DYNAMIC SWITCHING BETWEEN COMMUNICATIONS SCHEMES FOR UPLINK COMMUNICATIONS

Methods, systems, and devices for wireless communication are described. In some systems, a user equipment (UE) may support multiple communications schemes, including a time division multiplexing (TDM) scheme, a frequency division multiplexing (FDM) scheme, a spatial division multiplexing (SDM) scheme, and a single transmission/reception point (sTRP) scheme. The UE may receive control signaling that indicates the multiple communications schemes and downlink control information (DCI) that schedules an uplink data message. The DCI may indicate one or more sounding reference signal (SRS) resource sets associated with the uplink data message. The UE may transmit the uplink data message in accordance with a switching arrangement for switching between the communications schemes. The switching arrangement may be indicated for the uplink data message by one or more of the control signaling, the DCI, or the one or more SRS resource sets.

FIELD OF TECHNOLOGY

The following relates to wireless communication, including dynamic switching between communications schemes for uplink communications.

BACKGROUND

In some systems, a UE may support transmission of one or more uplink data messages according to any one of a time division multiplexing (TDM) scheme, a spatial division multiplexing (SDM) scheme, and an FDM scheme.

SUMMARY

The described techniques relate to improved methods, systems, devices, and apparatuses that support dynamic switching between communications schemes for uplink communications. Generally, the described techniques provide for a user equipment (UE) to switch between a set of multiple communications schemes for transmission of one or more uplink data messages. The UE may receive control signaling that indicates a configuration of the set of multiple communications schemes for uplink communications by the UE. The set of multiple communications schemes may include a time division multiplexing (TDM) scheme, a frequency division multiplexing (FDM) scheme, a spatial division multiplexing (SDM) scheme, a single transmission/reception point (sTRP) transmission scheme, or any combination thereof. The UE may receive, after receiving the control signaling, downlink control information (DCI) that schedules at least one uplink data message and indicates one or more sounding reference signal (SRS) resource sets associated with the uplink data message. A switching arrangement for switching between the multiple sets of communications schemes may be indicated by one or more of the control signaling, the DCI, or the one or more SRS resources sets. The UE may transmit the uplink data message in accordance with the switching arrangement. For example, the UE may transmit a portion of the uplink data message or one or more repetitions of the uplink data message using one of the communications schemes and based on the indicated switching arrangement.

A method for wireless communication at a UE is described. The method may include receiving control signaling that indicates a configuration of a set of multiple communications schemes for uplink communications by the UE, the set of multiple communications schemes including an FDM scheme, a TDM scheme, an SDM scheme, and an sTRP transmission scheme, receiving DCI that schedules an uplink data message and indicates one or more SRS resource sets associated with the uplink data message, where a switching arrangement between the set of multiple communications schemes is indicated for the uplink data message by one or more of the control signaling, the DCI, or the one or more SRS resource sets, and transmitting the uplink data message in accordance with the switching arrangement.

An apparatus for wireless communication at a UE is described. The apparatus may include a processor, memory coupled with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to receive control signaling that indicates a configuration of a set of multiple communications schemes for uplink communications by the UE, the set of multiple communications schemes including an FDM scheme, a TDM scheme, an SDM scheme, and an sTRP transmission scheme, receive DCI that schedules an uplink data message and indicates one or more SRS resource sets associated with the uplink data message, where a switching arrangement between the set of multiple communications schemes is indicated for the uplink data message by one or more of: the control signaling, the DCI, or the one or more SRS resource sets, and transmit the uplink data message in accordance with the switching arrangement.

Another apparatus for wireless communication at a UE is described. The apparatus may include means for receiving control signaling that indicates a configuration of a set of multiple communications schemes for uplink communications by the UE, the set of multiple communications schemes including an FDM scheme, a TDM scheme, an SDM scheme, and an sTRP transmission scheme, means for receiving DCI that schedules an uplink data message and indicates one or more SRS resource sets associated with the uplink data message, where a switching arrangement between the set of multiple communications schemes is indicated for the uplink data message by one or more of: the control signaling, the DCI, or the one or more SRS resource sets, and means for transmitting the uplink data message in accordance with the switching arrangement.

A non-transitory computer-readable medium storing code for wireless communication at a UE is described. The code may include instructions executable by a processor to receive control signaling that indicates a configuration of a set of multiple communications schemes for uplink communications by the UE, the set of multiple communications schemes including an FDM scheme, a TDM scheme, an SDM scheme, and an sTRP transmission scheme, receive DCI that schedules an uplink data message and indicates one or more SRS resource sets associated with the uplink data message, where a switching arrangement between the set of multiple communications schemes is indicated for the uplink data message by one or more of the control signaling, the DCI, or the one or more SRS resource sets, and transmit the uplink data message in accordance with the switching arrangement.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, receiving the DCI may include operations, features, means, or instructions for receiving a switching indication field, where a value of the switching indication field indicates the switching arrangement between the set of multiple communications schemes for the uplink data message.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the one or more SRS resource sets indicated via the DCI include a first SRS resource set and a second SRS resource set associated with the uplink data message and the switching arrangement indicates an arrangement for transmitting a first portion or a first repetition of the uplink data message in accordance with a first set of parameters associated with the first SRS resource set and for transmitting a second portion or a second repetition of the uplink data message in accordance with a second set of parameters associated with the second SRS resource set.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, receiving the control signaling may include operations, features, means, or instructions for receiving a radio resource control (RRC) message that indicates an uplink switching mode for the UE, the uplink switching mode associated with a switch between a subset of communications schemes of the set of multiple communications schemes and selected from one of a first uplink switching mode and a second uplink switching mode. In some examples, the first uplink switching mode may be associated with a first subset of communications schemes including the SDM scheme and the sTRP transmission scheme, and the second uplink switching mode may be associated with a second subset of communications schemes including the FDM scheme, the TDM scheme, and the sTRP transmission scheme.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining a communications scheme of the set of multiple communications schemes for transmitting the uplink data message based on the indicated uplink switching mode and the value of the switching indication field, where each value of the switching indication field indicates a respective communications scheme of the subset of communications schemes associated with the uplink switching mode.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the uplink switching mode may be the first uplink switching mode and the method, apparatuses, and non-transitory computer-readable medium may include further operations, features, means, or instructions for determining whether a communications scheme of the set of multiple communications schemes for transmitting the uplink data message is the SDM scheme or the sTRP transmission scheme based on the value of the switching indication field. In some examples, a first set of values of the switching indication field indicates the sTRP transmission scheme and a second set of values of the switching indication field indicates the SDM scheme.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the uplink switching mode may be the second uplink switching mode and the method, apparatuses, and non-transitory computer-readable medium may include further operations, features, means, or instructions for determining that a communications scheme of the set of multiple communications schemes for transmitting a set of multiple sets of repetitions of the uplink data message is associated with multiple TRPs based on one or more first values of the switching indication field and a value of a time domain resource allocation (TDRA) field in the DCI, where the value of the TDRA field of the DCI indicates whether the communications scheme may be the FDM scheme or the TDM scheme.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining the switching arrangement and a communications scheme of the set of multiple communications schemes for transmitting the uplink data message based on the value of the switching indication field, where each value of a set of multiple values of the switching indication field indicates a respective switching arrangement of a set of multiple switching arrangements and a respective communications scheme of the set of multiple communications schemes for transmitting the uplink data message.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the DCI further includes a first resource indication field associated with a first set of multiple values and a second resource indication field associated with a second set of multiple values. In some examples, a first subset of values of the first set of multiple values may be associated with resource indications for a first SRS resource set based on the switching indication field indicating the SDM scheme, and a second subset of values of the second set of multiple values may be associated with resource indications for a second SRS resource set based on the switching indication field indicating the SDM scheme.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the DCI further includes a first resource indication field associated with a first set of multiple values and a second resource indication field associated with a second set of multiple values. In some examples, a first subset of values of the first set of multiple values may be associated with resource indications for a first SRS resource set based on the switching indication field indicating the SDM scheme, and a second subset of values of the first set of multiple values may be associated with resource indications for a second SRS resource set based on the switching indication field indicating the SDM scheme.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, receiving the control signaling may include operations, features, means, or instructions for receiving an RRC message that indicates two or more SRS resource sets for the UE, where the RRC message indicates a communications scheme of the set of multiple communications schemes for transmission of the uplink data message, and where transmitting the uplink data message may be based on the communications scheme indicated via the RRC message.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining the communications scheme based on the RRC message and a frequency band on which the uplink data message may be transmitted, where the RRC message indicates a respective communications scheme of the set of multiple communications schemes for each frequency band of a set of multiple frequency bands.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining the communications scheme based on the RRC message and a configuration of the DCI, where the RRC message indicates a respective communications scheme of the set of multiple communications schemes for each type of the DCI of a set of multiple types.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, receiving the control signaling may include operations, features, means, or instructions for receiving a medium access control-control element (MAC-CE) that indicates a communications scheme of the set of multiple communications schemes for transmission of the uplink data message, where transmitting the uplink data message may be based on the communications scheme indicated via the MAC-CE.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving an RRC message that indicates two SRS resource sets for the UE, where the MAC-CE disables a first SRS resource set of the two SRS resource sets, and where a presence of a switching indication field in the DCI may be based on disabling the first SRS resource set.

A method for wireless communication at a base station is described. The method may include transmitting, to a UE, control signaling that indicates a configuration of a set of multiple communications schemes for uplink communications by the UE, the set of multiple communications schemes including an FDM scheme, a TDM scheme, an SDM scheme, and an sTRP transmission scheme, transmitting, to the UE, DCI that schedules an uplink data message and indicates one or more SRS resource sets associated with the uplink data message, where a switching arrangement between the set of multiple communications schemes is indicated for the uplink data message by one or more of: the control signaling, the DCI, or the one or more SRS resource sets, and receiving, from the UE, the uplink data message in accordance with the switching arrangement.

An apparatus for wireless communication at a base station is described. The apparatus may include a processor, memory coupled with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to transmit, to a UE, control signaling that indicates a configuration of a set of multiple communications schemes for uplink communications by the UE, the set of multiple communications schemes including an FDM scheme, a TDM scheme, an SDM scheme, and an sTRP transmission scheme, transmit, to the UE, DCI that schedules an uplink data message and indicates one or more SRS resource sets associated with the uplink data message, where a switching arrangement between the set of multiple communications schemes is indicated for the uplink data message by one or more of: the control signaling, the DCI, or the one or more SRS resource sets, and receive, from the UE, the uplink data message in accordance with the switching arrangement.

Another apparatus for wireless communication at a base station is described. The apparatus may include means for transmitting, to a UE, control signaling that indicates a configuration of a set of multiple communications schemes for uplink communications by the UE, the set of multiple communications schemes including an FDM scheme, a TDM scheme, an SDM scheme, and an sTRP transmission scheme, means for transmitting, to the UE, DCI that schedules an uplink data message and indicates one or more SRS resource sets associated with the uplink data message, where a switching arrangement between the set of multiple communications schemes is indicated for the uplink data message by one or more of the control signaling, the DCI, or the one or more SRS resource sets, and means for receiving, from the UE, the uplink data message in accordance with the switching arrangement.

A non-transitory computer-readable medium storing code for wireless communication at a base station is described. The code may include instructions executable by a processor to transmit, to a UE, control signaling that indicates a configuration of a set of multiple communications schemes for uplink communications by the UE, the set of multiple communications schemes including an FDM scheme, a TDM scheme, an SDM scheme, and an sTRP transmission scheme, transmit, to the UE, DCI that schedules an uplink data message and indicates one or more SRS resource sets associated with the uplink data message, where a switching arrangement between the set of multiple communications schemes is indicated for the uplink data message by one or more of: the control signaling, the DCI, or the one or more SRS resource sets, and receive, from the UE, the uplink data message in accordance with the switching arrangement.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, transmitting the DCI may include operations, features, means, or instructions for transmitting a switching indication field, where a value of the switching indication field indicates the switching arrangement between the set of multiple communications schemes for the uplink data message.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the one or more SRS resource sets indicated via the DCI include a first SRS resource set and a second SRS resource set associated with the uplink data message and the switching arrangement indicates an arrangement for transmitting a first portion or a first repetition of the uplink data message in accordance with a first set of parameters associated with the first SRS resource set and for transmitting a second portion or a second repetition of the uplink data message in accordance with a second set of parameters associated with the second SRS resource set.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, transmitting the control signaling may include operations, features, means, or instructions for transmitting an RRC message that indicates an uplink switching mode for the UE, the uplink switching mode associated with a switch between a subset of communications schemes of the set of multiple communications schemes and selected from one of a first uplink switching mode and a second uplink switching mode. In some examples, the first uplink switching mode may be associated with a first subset of communications schemes including the SDM scheme and the sTRP transmission scheme, and the second uplink switching mode may be associated with a second subset of communications schemes including the FDM scheme, the TDM scheme, and the sTRP transmission scheme.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, each value of the switching indication field indicates a respective communications scheme of the subset of communications schemes associated with the indicated uplink switching mode.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the uplink switching mode may be the first uplink switching mode, and a first set of values of the switching indication field may indicate the sTRP transmission scheme, and a second set of values of the switching indication field may indicate the SDM scheme.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the uplink switching mode may be the second uplink switching mode, and one or more first values of the switching indication field may correspond to a communications scheme of the set of multiple communications schemes that may be associated with multiple TRPs, and a value of a TDRA field in the DCI indicates whether the communications scheme may be the FDM scheme or the TDM scheme.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, each value of a set of multiple values of the switching indication field indicates a respective switching arrangement of a set of multiple switching arrangements and a respective communications scheme of the set of multiple communications schemes for transmitting the uplink data message.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the DCI further includes a first resource indication field associated with a first set of multiple values and a second resource indication field associated with a second set of multiple values, a first subset of values of the first set of multiple values may be associated with resource indications for a first SRS resource set based on the switching indication field indicating the SDM scheme, and a second subset of values of the second set of multiple values may be associated with resource indications for a second SRS resource set based on the switching indication field indicating the SDM scheme.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the DCI further includes a first resource indication field associated with a first set of multiple values and a second resource indication field associated with a second set of multiple values, a first subset of values of the first set of multiple values may be associated with resource indications for a first SRS resource set based on the switching indication field indicating the SDM scheme, and a second subset of values of the first set of multiple values may be associated with resource indications for a second SRS resource set based on the switching indication field indicating the SDM scheme.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, transmitting the control signaling may include operations, features, means, or instructions for transmitting an RRC message that indicates two or more SRS resource sets for the UE, where the RRC message indicates a communications scheme of the set of multiple communications schemes for transmission of the uplink data message, and where transmitting the uplink data message may be based on the communications scheme indicated via the RRC message.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, transmitting the control signaling may include operations, features, means, or instructions for transmitting a MAC-CE that indicates a communications scheme of the set of multiple communications schemes for transmission of the uplink data message, where transmitting the uplink data message may be based on the communications scheme indicated via the MAC-CE.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting an RRC message that indicates two SRS resource sets for the UE, where the MAC-CE disables a first SRS resource set of the two reference signal resource sets, and where a presence of a switching indication field in the DCI may be based on disabling the first SRS resource set.

DETAILED DESCRIPTION

In some wireless communications systems, a user equipment (UE) may transmit uplink data messages to a base station via an uplink data channel. The base station may transmit control signaling to the UE to indicate a configuration of a sounding reference signal (SRS) resource set for the uplink data transmissions. The base station may transmit downlink control information (DCI) that schedules each uplink data message. The DCI may include an SRS resource indication (SRI) field that indicates one or more of the SRS resources from the SRS resource set. The UE may transmit the uplink message using transmission parameters that are associated with the indicated SRS resource(s).

A UE may receive DCI that schedules multiple repetitions of an uplink data message over time. If the UE supports time division multiplexing (TDM) for uplink communication, a first subset of the uplink repetitions may be associated with a different set of transmission parameters than a second subset of the uplink repetitions. In such cases, the DCI may include a switching indication field that indicates whether the UE is to use transmission parameters associated with a first SRS resource set, a second SRS resource set, or both for transmitting the uplink repetitions. If the DCI indicates both sets of transmission parameters, a first subset of the uplink repetitions may be associated with the first resource set and directed toward a first transmission/reception point (TRP) and a second subset of the repetitions may be associated with the second resource set and directed toward a second TRP. If the UE supports a spatial division multiplexing (SDM) scheme or a frequency division multiplexing (FDM) scheme for uplink communication, different spatial layers or sets of resource blocks (RBs) of an uplink data message may be associated with different SRS resource sets and directed toward different TRPs. A configuration for indicating a switching arrangement that supports switching between TDM, FDM, and SDM schemes may be beneficial.

As described herein, a base station may transmit control signaling, DCI, or both to indicate a switching arrangement for the UE to switch between communications schemes and corresponding transmission parameters for uplink communications according to any of a TDM scheme, an FDM scheme, an SDM scheme, and a single TRP (sTRP) scheme. The base station may transmit control signaling to the UE to indicate a configuration of the multiple communications schemes. The control signaling may additionally or alternatively configure two or more SRS resource sets for the UE. The base station may subsequently transmit DCI to the UE to schedule an uplink data message, one or more repetitions of the uplink data message, or both. One or more SRI fields in the DCI may indicate one or more SRS resources from the SRS resource sets that are associated with the uplink data message. The indicated SRS resources may correspond to one or more sets of transmission parameters that the UE may use to transmit the uplink data message. The control signaling, the DCI, or both may indicate, to the UE, one of the communications schemes and a switching arrangement for the UE to use to transmit the uplink data message. The UE may transmit the uplink data message using the indicated communication scheme. The UE may transmit one or more portions or repetitions of the uplink data message using different sets of transmission parameters based on the switching arrangement. A portion of the uplink data message may correspond to a set of RBs, a set of spatial layers, or both.

In some examples, the control signaling may be radio resource control (RRC) signaling or a medium access control-control element (MAC-CE) that indicates one of the communications schemes for the UE to use. The UE may subsequently receive the DCI that indicates how the UE should switch between SRS resource sets for transmitting respective portions or repetitions of an uplink data message using the indicated communications scheme. Alternatively, the control signaling may be a MAC-CE that disables all but one of the SRS resource sets configured for the UE, and the UE may transmit the repetitions to a single TRP according to the indicated communications scheme and a single SRS resource set (e.g., without a switching arrangement). In some other examples, the control signaling may indicate a configuration of the SRS resource sets and the multiple communications schemes, and the DCI may indicate a single communications scheme and corresponding switching arrangement for the UE. For example, the UE may support a set of switching arrangements and a value of a switching indication field in the DCI may indicate or point to a single communications scheme and corresponding switching arrangement of the set of switching arrangements for the UE. The switching indication field may be referred to as a dynamic switching field herein. As such, the described techniques provide for a UE to switch between multiple communications schemes for uplink data transmissions.

Aspects of the disclosure are initially described in the context of wireless communications systems. Additional aspects of the disclosure are described with reference to communications scheme configurations, switching arrangements, SRI configurations, and process flows. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to dynamic switching between communications schemes for uplink communications.

In some examples, one or more components of the wireless communications system100may operate as or be referred to as a network node. As used herein, a network node may refer to any UE115, base station105, entity of a core network130, apparatus, device, or computing system configured to perform any techniques described herein. For example, a network node may be a UE115. As another example, a network node may be a base station105. As another example, a first network node may be configured to communicate with a second network node or a third network node. In one aspect of this example, the first network node may be a UE115, the second network node may be a base station105, and the third network node may be a UE115. In another aspect of this example, the first network node may be a UE115, the second network node may be a base station105, and the third network node may be a base station105. In yet other aspects of this example, the first, second, and third network nodes may be different. Similarly, reference to a UE115, a base station105, an apparatus, a device, or a computing system may include disclosure of the UE115, base station105, apparatus, device, or computing system being a network node. For example, disclosure that a UE115is configured to receive information from a base station105also discloses that a first network node is configured to receive information from a second network node. In this example, consistent with this disclosure, the first network node may refer to a first UE115, a first base station105, a first apparatus, a first device, or a first computing system configured to receive the information; and the second network node may refer to a second UE115, a second base station105, a second apparatus, a second device, or a second computing system

In some examples, a UE115may switch between set of multiple communications schemes for transmission of one or more uplink data messages. The UE115may receive control signaling from a base station105that indicates a configuration of the set of multiple communications schemes for uplink communications by the UE115. The set of multiple communications schemes may include a TDM scheme, an FDM scheme, an SDM scheme, an sTRP transmission scheme, or any combination thereof. The UE115may receive, after receiving the control signaling, DCI that schedules at least one uplink data message and that indicates one or more SRS resource sets associated with the uplink data message. A switching arrangement for switching between the SRS resource sets may be indicated by one or more of the control signaling, the DCI, or the one or more SRS resources sets. The UE115may transmit the uplink data message to the base station105in accordance with the switching arrangement. For example, the UE115may transmit a portion of the uplink data message or one or more repetitions of the uplink data message using one of the communications schemes and based on the indicated switching arrangement.

FIG.2illustrates an example of a wireless communications system200that supports dynamic switching between communications schemes for uplink communications in accordance with aspects of the present disclosure. The wireless communications system200may implement or be implemented by aspects of the wireless communications system100as described with reference toFIG.1. For example, the wireless communications system200may include a base station105-aand a UE115-a, which may represent examples of a UE115and a base station105as described with reference toFIG.1.

In the example ofFIG.2, the base station105-amay include, or be in communication with, one or more access network transmission entities, which may be referred to as radio heads, smart radio heads, or TRPs205. The base station105-amay communicate with the TRPs205-aand205-bvia backhaul links220-aand220-b, respectively, which may represent examples of backhaul links120as described with reference toFIG.1. The UE115-amay communicate with the TRPs205-aand205-bvia downlink communication links215and uplink communication links225. The TRPs205may forward downlink data and control information from the base station105-ato the UE115-a. The TRPs205may receive uplink data from the UE115-aand forward the uplink data to the base station105-avia the backhaul links220. The TRPs205and the UE115-amay support beamformed communications. For example, the TRP205-a, the TRP205-b, and the UE115-amay each perform beamforming using a respective set of beams210for uplink and downlink communications.

The UE115-amay transmit one or more uplink data messages230to the base station105-avia the uplink communication link225-a, the uplink communication link225-b, or both (e.g., via the TRPs205). In some cases, the base station105-amay schedule the uplink communications by the UE115-a. The base station105-amay configure an SRS resource set for uplink communications by the UE115-a. Each SRS resource in the SRS resource set may be associated with a set of transmission parameters, such as a spatial domain filter (e.g., a beam), a quantity of antenna ports, or other transmission parameters. The base station105-amay transmit a scheduling DCI240to the UE115-ato schedule each uplink data message230. The base station105-amay transmit the scheduling DCI240to the UE115-avia a physical downlink control channel (PDCCH) of the downlink communication link215-a, the downlink communication link215-b, or both (e.g., via one or both of the TRPs205-aand205-b). The base station105-amay transmit an SRI field in the DCI240that may indicate one or more SRS resources from the SRS resource set that are associated with the respective uplink data message230. The UE115-amay transmit the uplink data message230using transmission parameters that are associated with the indicated SRS resource(s).

The UE115-amay support two types of uplink communications, such as codebook-based physical uplink shared data channel (PUSCH) communications and non-codebook-based PUSCH communications. The SRS resources may be configured based on the type of uplink communications. For codebook-based PUSCH, the base station105-amay transmit control signaling235(e.g., RRC signaling) that configures the SRS resource set for codebook-based PUSCH (e.g., an SRS resource set with “usage” set to “codebook”). The SRS resource set may include a first quantity of SRS resources configured for the UE115-a(e.g., a maximum of four SRS resources, or some other quantity of resources). Each SRS resource in the SRS resource set may be configured with a quantity of antenna ports (e.g., nrofSRS-Ports). The SRI field in the DCI240may indicate a single SRS resource from the SRS resource set. The UE115-amay determine a quantity of antenna ports to use for transmitting the uplink data message230based on a quantity of antenna ports that are associated with the indicated SRS resources. The quantity of antenna ports may, in some cases, correspond to a quantity of spatial layers of the uplink data message230, a quantity of TRPs205associated with the uplink data message230, or both. The UE115-amay transmit the uplink data message230using a same spatial domain filter (e.g., beam) as the indicated SRS resource. The DCI240may include a different field, such as a precoding information and number of layers field, configured to indicate a quantity of spatial layers (e.g., a rank) and a precoder (e.g., a transmit precoding matrix indicator (TPMI)) for the uplink data message230.

For non-codebook-based PUSCH, the base station105-amay transmit the control signaling235(e.g., RRC signaling) that configures the SRS resource set for non-codebook-based PUSCH (e.g., an SRS resource set with “usage” set to “non-codebook”). The SRS resource set may include a first quantity of SRS resources configured for the UE115-a(e.g., a maximum of four SRS resources, or some other quantity of SRS resources). Each SRS resource in the SRS resource set may be configured with, for example, one antenna port. The SRI field in the DCI240may indicate one or more SRS resources from the SRS resource set. The UE115-amay determine a quantity of antenna ports to use for transmitting the uplink data message230based on a quantity of SRS resources that are indicated via the DCI240. The quantity of antenna ports may, in some cases, correspond to a quantity of spatial layers of the uplink data message230, a quantity of TRPs205associated with the uplink data message230, or both. The UE115-amay transmit the uplink data message230using a same spatial domain filter (e.g., beam) as the indicated SRS resource(s). For both codebook-based and non-codebook-based PUSCH, a size of the SRI field in the DCI240(e.g., a quantity of bits) may be based on a quantity of SRS resources within the SRS resource set configured for the UE115-a.

The UE115-amay support PUSCH repetition in a TDM manner. For example, the UE115-amay receive a single DCI240that schedules a first uplink data message230and one or more repetitions of the uplink data message230, where each uplink repetition may be transmitted at a different time (e.g., in a TDM fashion). In some cases, the DCI240may indicate different transmission parameters for the uplink repetitions. The UE115-amay be configured with two or more SRS resource sets, and the DCI240may include a first resource indication field (e.g., an SRI or TPMI field) for indicating a first SRS resource from a first SRS set and a second resource indication field for indicating a second SRS resource from a second SRS resource set. That is, uplink repetitions that are scheduled by a same DCI240may belong to two sets, where each set may be associated with a different SRS resource set and a different set of transmission parameters. The transmission parameters may include spatial relation parameters (e.g., a beam), power control parameters, precoding parameters, or any combination thereof.

In some examples, each SRS resource set and corresponding set of transmission parameters may correspond to a different TRP205. For example, the first set of transmission parameters may indicate a beam and power control parameters that are targeted toward a first TRP205-aand the second set of transmission parameters may indicate a beam and power control parameters that are targeted toward a second TRP205-b. The UE115-amay thereby support PUSCH repetition in an sTRP manner (e.g., using a single SRS resource set) and a multi-TRP TDM manner (e.g., using multiple SRS resource sets).

To support switching between sTRP and multi-TRP TDM communications, the DCI240may include a switching field that is configured to indicate a switching arrangement (e.g., a pattern or configuration) for switching between the two sets of transmission parameters for the uplink repetitions. A value of the switching field (e.g., a two-bit field) may indicate whether the UE115-ais to transmit the uplink repetitions using one or two SRS resource sets, and which repetitions are associated with which resource sets. Table 1 illustrates example values of the uplink switching field and corresponding switching arrangements. In some examples, such as in the example of Table 1, the value of the switching field may be referred to as a codepoint.

In the example of Table 1, the switching field may include two bits and may indicate that the UE115-ais to use the first set of parameters associated with the first SRS resource set and the TRP205-a(e.g., TRP1), use the second set of parameters associated with the second SRS resource set and the TRP205-b(e.g., TRP2), use both sets of parameters for two sets of uplink repetitions with a first order (e.g., TRP1, TRP2), or to use both sets of parameters for two sets of uplink repetitions with a second order (e.g., TRP2, TRP1). The first SRS resource set may be the SRS resource set that has the lowest ID value (e.g., ID=2) of the two SRS resource sets configured for the UE115-a. The other SRS resource set with a higher ID value (e.g., ID=4) may be configured as the second SRS resource set.

The order of the switching arrangement (e.g., for the codepoints 10 and 11) may indicate which SRS resource set to use for a first uplink repetition in time, and the UE115-amay alternate between the SRS resource sets for transmission of the remaining uplink repetitions in accordance with the order and the sets of uplink repetitions. For example, if the switching field indicates the codepoint 10, the UE115-amay transmit a first uplink repetition in accordance with the first set of transmission parameters directed toward the TRP205-a, a second uplink data message in accordance with the second set of transmission parameters directed toward the TRP205-b, and the UE115-amay continue to transmit remaining uplink repetitions in an alternating fashion. A quantity of uplink repetitions (e.g., a repetition number) may be indicated by a value of a time domain resource allocation (TDRA) field in the DCI240. The described switching field may be applied for both codebook-based PUSCH and non-codebook-based PUSCH communications.

The UE115-aas described herein may support FDM and SDM schemes for uplink data transmissions (e.g., PUSCH) in addition to, or as an alternative to, the described TDM scheme. For example, the UE115-amay receive control signaling235that indicates multiple communications schemes for the UE115-a, including a TDM scheme, an FDM scheme, an SDM scheme, an sTRP transmission scheme, or any combination thereof. The TDM scheme, the FDM scheme, and the SDM scheme may be associated with multi-TRP transmissions, and the sTRP transmission scheme may correspond to transmission of uplink repetitions directed to a single TRP205. During the TDM, FDM, or SDM schemes, the UE115-amay transmit one or more portions (e.g., a set of RBs or spatial layers) or one or more repetitions of the uplink data message toward each of the TRP205-aand the TRP205-b(e.g., and/or one or more other TRPs205). During the sTRP transmission scheme, the UE115-amay transmit each portion and uplink repetition of the uplink data message to a same TRP205. The TDM, FDM, and SDM schemes are illustrated and described in further detail with respect toFIG.3.

In some examples, the UE115-amay be configured with two SRS resource sets, and each SRS resource set may correspond to a different TRP205and corresponding set of transmission parameters. For example, each TRP205may be associated with a respective SRS resource set and corresponding set of transmission parameters. For multi-TRP communications, the UE115-amay transmit a first set of RBs, a first set of spatial layers, or a first set of uplink repetitions toward the TRP205-ain accordance with a first set of transmission parameters. The first set of transmission parameters may be indicated by a first SRI field in the DCI240that indicates SRS resources from a first SRS resource set. The UE115-amay transmit a second set of RBs, a second set of spatial layers, or a second set of uplink repetitions toward the TRP205-bin accordance with a second set of transmission parameters. The second set of transmission parameters may be indicated by a second SRI field in the DCI240that indicates SRS resources from a second SRS resource set. In some cases, the switching field in DCI may not be configured to support switching between TDM, FDM, and SDM schemes.

Enhanced signaling described herein may provide for the base station105-ato dynamically or semi-statically indicate, to the UE115-a, which communications scheme to use and a switching arrangement for switching between sets of transmission parameters for the indicated communications schemes. For example, the wireless communications system200may support enhanced control signaling235, an enhanced DCI240, or both that are capable of indicating a communications scheme and a switching arrangement for the UE115-ato use for transmitting one or more uplink repetitions of an uplink data message230. The switching arrangement may correspond to a mode, configuration, or pattern for the UE115-ato use for switching between sets of transmission parameters for each portion (e.g., set of RBs or spatial layers) or repetition of the uplink data message230. The enhanced signaling may be used for codebook or non-codebook-based communications when a UE115is configured with two or more SRS resource sets.

The base station105-amay transmit the control signaling235to the UE115-ato indicate a configuration of the two or more SRS resource sets for the UE115-a. The two or more SRS resource sets may be configured for codebook or non-codebook-based PUSCH. In some examples, the control signaling235may include an RRC message that configures two SRS resource sets and indicates a communications scheme for the UE115-ato use for performing subsequent uplink transmissions. The communications scheme may be one of the FDM, TDM, or SDM schemes. The UE115-amay transmit subsequent uplink data messages230in accordance with the indicated communications scheme. In some examples, the RRC message may configure a communications scheme per frequency band (e.g., per component carrier or per bandwidth part (BWP)). The UE115-amay determine which communications scheme to use based on the RRC message and a frequency band on which the uplink repetitions are scheduled. Additionally or alternatively, the RRC message may configure a communications scheme per type of the DCI240. For example, the RRC message may configure a respective communications scheme for each format of the DCI240(e.g., DCI format 0_1 or 0_2 for dynamically granted PUSCH), or the RRC message may configure a respective communications scheme for each grant configuration (e.g., for configured grant PUSCH). The UE115-amay determine which communications scheme to use for transmitting uplink repetitions based on the RRC message and a type of the DCI240or other scheduling grant that the UE115-areceives.

Additionally or alternatively, the base station105-amay transmit the RRC message to indicate the configuration of the two SRS resource sets, and the base station105-amay subsequently transmit a MAC-CE to indicate a communications scheme. The UE115-amay transmit subsequent uplink data messages230in accordance with the communications scheme indicated via the MAC-CE. The MAC-CE may be transmitted dynamically or semi-statically to indicate a switch or change in communications schemes to the UE115-a. The MAC-CE may additionally, or alternatively, enable or disable one or more of the SRS resource sets configured for the UE115-ato enable or disable multi-TRP communications. For example, if the MAC-CE disables one of the two SRS resource sets configured for the UE115-a, the UE115-amay perform single-TRP communications until a subsequent MAC-CE enables both of the SRS resource sets.

The base station105-amay transmit the DCI240to the UE115-aafter transmitting the control signaling235(e.g., the RRC message, the MAC-CE, or both). The DCI240may schedule the uplink data message230and corresponding uplink repetitions. The DCI240may be transmitted dynamically or semi-statically, and may represent an example of a dynamic grant or a configured grant for the UE115-a. The DCI240may include two SRI fields. A first SRI field in the DCI240may indicate an SRS resource from the first SRS resource set configured for the UE115-aand a second SRI field in the DCI240may indicate an SRS resource from the second SRS resource set configured for the UE115-a. The first SRS resource, the second SRS resource, or both may be associated with a respective set of parameters for the UE115-ato use to transmit the uplink data message230.

To support switching between the sets of transmission parameters for each portion or repetition of the uplink data message230as described herein, the DCI240may include a dynamic switching field configured to indicate which set(s) of parameters the UE115-ashould use and an order for switching between the sets of transmission parameters. If the MAC-CE disables one of the two SRS resource sets for the UE115-a, the dynamic switching field may be empty, or may not be present in the DCI240. Configurations of the dynamic switching field are described in further detail elsewhere herein, including with reference toFIGS.4-7.

The described techniques support transmission of uplink data repetitions according to an FDM scheme, a TDM scheme, an SDM scheme, an sTRP transmission scheme, or any combination thereof. The UE115-amay thereby switch between multiple communications schemes for transmission of uplink data messages230, which may provide for improved communication reliability and efficiency for uplink communications.

FIG.3illustrates an example of a communications scheme configuration300that supports dynamic switching between communications schemes for uplink communications in accordance with aspects of the present disclosure. The communications scheme configuration300may implement or be implemented by aspects of the wireless communications systems100and200as described with reference toFIGS.1and2. For example, the communications scheme configuration300illustrates example configurations or allocations of resources for different uplink communications schemes supported by a UE115, which may represent an example of a UE115as described with reference toFIGS.1and2. The UE115may transmit uplink data messages to a base station105in accordance with one or more of the communications schemes illustrated in the communications scheme configuration300.

The communications scheme configuration300illustrates example allocations of resources for an SDM scheme305, an FDM scheme310, and a TDM scheme315. The UE115may support each of the communications schemes, and the UE115may receive control signaling, DCI, or both that indicates which scheme the UE115should use at a given time. The resources illustrated inFIG.3may include symbols in a time domain (e.g., a horizontal axis inFIG.3) and RBs in a frequency domain (e.g., a vertical axis inFIG.3). In some examples, the resources may be spatially layered in a spatial domain (e.g., an axis extending out of the page inFIG.3). Although not illustrated inFIG.3, each uplink data message may include one or multiple spatial layers, including uplink data messages transmitted according to the FDM scheme310or the TDM scheme315. A quantity of the spatial layers may correspond to a rank of the uplink data message, and may be determined based on a quantity of SRS resources that are indicated, a quantity of antenna ports associated with an indicated SRS resource, or a TPMI field in the DCI, as described with reference toFIG.2.

If the signaling indicates the SDM scheme305, the spatial layers of the uplink data message may be grouped into sets of one or more spatial layers, and each set may be associated with same or different transmission parameters. In the example ofFIG.3, a first spatial layer may be transmitted in accordance with a first set of transmission parameters (e.g., a first SRS resource set) and a second spatial layer may be transmitted in accordance with a second set of transmission parameters (e.g., a second SRS resource set). Each set of transmission parameters may be associated with or directed toward a different TRP. As such, the first spatial layer may be transmitted to a first TRP (e.g., TRP205-ainFIG.2) and the second spatial layer may be transmitted to a second TRP (e.g., TRP205-binFIG.2). The UE115may determine which set of spatial layers is associated with which set of transmission parameters based on one or more SRI fields in the DCI and a value of a dynamic switching field in the DCI, as described in further detail with reference toFIGS.4-8. Although not pictured inFIG.3, it is to be understood that, in some examples, each spatial layer of an uplink data message may be transmitted in accordance with a same set of transmission parameters. In such cases, the uplink data message may be transmitted in an sTRP manner.

If the signaling indicates the FDM scheme310, the UE115may transmit an uplink data message that includes multiple sets of RBs each associated with a same or different set of transmission parameters. In the example ofFIG.3, a first set of RBs in the frequency domain may be transmitted in accordance with the first set of transmission parameters (e.g., a first SRS resource set) and a second set of RBs in the frequency domain may be transmitted in accordance with the second set of transmission parameters (e.g., a second SRS resource set). As such, the first set of RBs may be transmitted to the first TRP and the second set of RBs may be transmitted to the second TRP. The UE115may determine which set of RBs is associated with which set of transmission parameters based on one or more SRI fields in the DCI and a value of a dynamic switching field in the DCI, as described in further detail with reference toFIGS.5-8. Although not pictured inFIG.3, it is to be understood that, in some examples, each set of RBs in an uplink data message may be transmitted in accordance with a same set of transmission parameters. In such cases, the uplink data message may be transmitted according to an sTRP transmission scheme.

If the signaling indicates the TDM scheme315, the UE115may transmit multiple repetitions of the uplink data message in time. Each repetition of the uplink data message may be associated with a same or different set of transmission parameters. In the example ofFIG.3, a first repetition of the uplink data message may be transmitted in accordance with the first set of transmission parameters (e.g., a first SRS resource set) and a second repetition of the uplink data message may be transmitted in accordance with the second set of transmission parameters (e.g., a second SRS resource set). As such, the first uplink repetition may be transmitted to the first TRP and the second uplink repetition may be transmitted to the second TRP. The UE115may determine an order for switching between the sets of transmission parameters based on one or more SRI fields in the DCI and a value of a dynamic switching field in the DCI, as described in further detail with reference toFIGS.4-8. Although not pictured inFIG.3, it is to be understood that, in some examples, each repetition of an uplink data message may be transmitted in accordance with a same set of transmission parameters. In such cases, the uplink repetitions may be transmitted according to an sTRP transmission scheme.

A TDRA field in the DCI may indicate a quantity of repetitions of the uplink data message for the UE115to transmit in the time domain. The UE115may or may not support uplink repetition (e.g., PUSCH repetition) for the SDM scheme305and the FDM scheme310. If the TDRA field indicates more than one repetition for the SDM scheme305or the FDM scheme310, the UE115may refrain from transmitting the uplink repetitions, or the UE115may repeat the SDM or FDM pattern for each uplink repetition in time. If the UE115does not support repetitions for SDM, FDM, or both, the UE115may ignore the TDRA field and transmit a single uplink data message. If uplink repetition is enabled for any of the communications schemes, each repetition of an uplink message may include a same quantity of spatial layers. If the uplink data message is scheduled to be transmitted using the FDM scheme310or the TDM scheme315and with a rank that is greater than one (e.g., more than one spatial layer), each spatial layer may include a same FDM or TDM resource pattern.

As described herein, to support switching between the SDM scheme305, the FDM scheme310, and the TDM scheme315, the UE115may receive control signaling, a DCI, or both that indicate which communications scheme to use and a switching arrangement for transmitting uplink data in accordance with the indicated communications scheme. The switching arrangement may correspond to a configuration or pattern for the UE115to switch between SRS resource sets and corresponding sets of transmission parameters for transmitting respective sets of spatial layers (e.g., for the SDM scheme305), respective sets of RBs (e.g., for the FDM scheme310), or respective repetitions of the uplink data message (e.g., for the TDM scheme315), as described in further detail with reference toFIGS.4-8.

FIG.4illustrates an example of a switching arrangement400that supports dynamic switching between communications schemes for uplink communications in accordance with aspects of the present disclosure. The switching arrangement400may implement or be implemented by aspects of the wireless communications systems100and200, as described with reference toFIGS.1and2. For example, the switching arrangement400illustrates example arrangements that may be indicated by a base station105to a UE115via a dynamic switching field in DCI. The base station105and the UE115may represent examples of a base station105and a UE115as described with reference toFIGS.1through3. In this case, the dynamic switching field may indicate arrangements for a UE115to switch between an sTRP transmission scheme and an SDM scheme, in which the UE115may switch between sets of transmission parameters for transmission of different sets of spatial layers in an SDM manner. The SDM scheme may represent an example of the SDM scheme305described with reference toFIG.3.

As described with reference toFIG.2, the UE115may receive control signaling (e.g., an RRC configuration) from the base station105that configures the UE115with a first SRS resource set and a second SRS resource set for uplink communications. The SRS resource sets may be configured for codebook-based PUSCH or for non-codebook-based PUSCH. The first SRS resource set may be associated with a first set of transmission parameters and a first TRP (TRP1). The second SRS resource set may be associated with a second set of transmission parameters and a second TRP (TRP2). The control signaling may additionally indicate a configuration for the UE115to support an FDM communications scheme, a TDM communications scheme, an SDM communications scheme, and an sTRP transmission scheme.

The UE115may receive, via the control signaling, or via a second control signal (e.g., a second RRC message), an indication of an uplink switching mode for the UE115. The indication of the uplink switching mode may be transmitted dynamically or semi-statically, and the UE115may switch between a first uplink switching mode (mode 1) and a second uplink switching mode (mode 2) based on the signaling. Each uplink switching mode may be associated with switching between a subset of the multiple communications schemes. For example, the first uplink switching mode may be associated with the SDM scheme and the sTRP transmission scheme (e.g., an SDM mode). The second uplink switching mode may be associated with the TDM scheme, the FDM scheme, and the sTRP transmission scheme (e.g., a TDM-FDM mode). If the UE115receives an indication of the first uplink switching mode, the UE115may support switching between the SDM scheme (e.g., a multi-TRP SDM scheme) and the sTRP scheme. If the UE115receives an indication of the second uplink switching mode, the UE115may support switching between the TDM scheme, the FDM scheme (e.g., multi-TRP TDM and FDM schemes), and the sTRP scheme.

The UE115may receive scheduling DCI405from the base station105that indicates a communications scheme of the subset of communications schemes associated with the indicated uplink switching mode. As described with reference toFIG.2, the DCI405may include a dynamic switching field that is configured to indicate a communications scheme of the multiple communications schemes for the UE115and a switching arrangement for the UE115to use for transmitting the uplink message in accordance with the communications scheme. The switching arrangement may indicate whether the UE115is to use the first SRS resource set, the second SRS resource set, or both, and an order for the UE115to switch between sets of transmission parameters corresponding to the SRS resource sets. In some examples, the value of the dynamic switching field may be interpreted differently based on which uplink switching mode is configured for the UE115.

In the example ofFIG.4, the UE115may operate in the first uplink switching mode (e.g., the SDM mode).FIG.4illustrates an example values of the dynamic switching field in the DCI405and corresponding switching arrangements for the UE115to use for communicating an uplink data message using one or more sets of transmission parameters and the SDM scheme or the sTRP transmission scheme. The dynamic switching field may include at least two bits. If the control signaling indicates the first uplink switching mode, the UE115may determine a switching arrangement based on a value of the two bits. In some examples, the dynamic switching field may include more than two bits, and the UE115and the base station105may utilize two of the bits for indicating switching arrangements when the UE115operates in the first uplink switching mode.

A value of the dynamic switching field may indicate an uplink communications scheme and a switching arrangement for the UE115. For example, each value of the two bits of the dynamic switching field may index to or point to a switching arrangement in a table configured for the UE115. In some examples, the value of the dynamic switching field may be referred to as a codepoint. Table 2 illustrates example codepoint values and corresponding uplink switching arrangements for the first uplink switching mode.

As shown in Table 2 and illustrated inFIG.4, the values of the dynamic switching field for the first uplink switching mode may indicate that the UE115is to transmit one or more uplink data repetitions in an SDM manner. If the dynamic switching field indicates a first value (e.g., 00), the UE115may transmit each layer of the uplink data message in accordance with a first set of transmission parameters associated with the first SRS resource set. Each spatial layer may be transmitted to the first TRP. If the dynamic switching field indicates a second value (e.g., 01), the UE115may transmit each layer of the uplink data message in accordance with a second set of transmission parameters associated with the second SRS resource set. Each spatial layer may be transmitted to the second TRP. A quantity of spatial layers of the uplink data message may be based on the SRI field in the DCI505and may be associated with a rank of the uplink message. The first and second values of the dynamic switching field may thereby indicate that the UE115is to transmit the uplink data message using an sTRP transmission scheme and a single set of transmission parameters.

If the dynamic switching field indicates a third value (e.g., 10), the UE115may transmit a first set of spatial layers of the uplink message in accordance with the first set of transmission parameters associated with the first SRS resource set, and the UE115may transmit a second set of spatial layers of the uplink message in accordance with the second set of transmission parameters associated with the second SRS resource set. If the dynamic switching field indicates a fourth value (e.g., 11), the UE115may transmit a first set of spatial layers of the uplink message in accordance with the second set of transmission parameters associated with the second SRS resource set, and the UE115may transmit a second set of spatial layers of the uplink message in accordance with the first set of transmission parameters associated with the first SRS resource set. The first and second sets of spatial layers may each include one or multiple spatial layers.

Each set of spatial layers that is transmitted in accordance with a different set of transmission parameters may, in some examples, be transmitted to a different TRP. As such, if the dynamic switching field indicates the third or fourth values, the UE115may perform multi-TRP SDM communications. The third and fourth values may additionally indicate an order for the UE115to switch between the sets of transmission parameters and corresponding TRPs. For example, the codepoint 10 may indicate that the UE115is to transmit a first spatial layer based on the first SRS resource set and the first set of transmission parameters and transmit a second spatial layer based on the second SRS resource set and the second set of transmission parameters. The UE115may determine the first SRS resource set based on an ID of the first SRS resource set being greater than an ID of the second SRS resource set.

A quantity of spatial layers of the uplink data message (e.g., a rank) may be based on the SRI field in the DCI405. For example, for codebook-based PUSCH, the SRI field may indicate an SRS resource associated with a total rank of four (e.g., four spatial layers), and the UE115may transmit four spatial layers of the uplink data message accordingly. For non-codebook-based PUSCH, the SRI fields may indicate a total of four SRS resources, and the UE115may transmit four spatial layers of the uplink data message accordingly. A quantity of spatial layers in the first and second sets of spatial layers may be based on the first and second SRI fields, respectively. For example, if the first SRI field indicates a single SRS resource or an SRS resource associated with a rank of one from the first SRS resource set, the first set of spatial layers may include one spatial layer. If the second SRI field indicates two SRS resources or an SRS resource associated with a rank of two from the second SRS resource set, the second set of spatial layers may include two spatial layers.

AlthoughFIG.4illustrates a single repetition of the uplink data message in time, it is to be understood that the UE115may transmit one or more repetitions of the uplink data message in accordance with the SDM scheme and based on a value of a TDRA field in the DCI. For example, the UE115may, in some examples, repeat the indicated switching arrangement for each repetition of the uplink data message. The UE115may transmit the same quantity of spatial layers in each repetition of the uplink data message. Alternatively, the UE115may not support uplink repetition for SDM, and the UE115may transmit a single uplink message in accordance with the SDM scheme.

The UE115may thereby be configured to operation in first uplink switching mode for switching between SDM and sTRP communications. The UE115may determine whether to transmit spatial layers of an uplink message in accordance with a single set of transmission parameters or more than one set of transmission parameters based on a value of the dynamic switching field in the DCI405that schedules the uplink data message.

FIG.5illustrates an example of a switching arrangement500that supports dynamic switching between communications schemes for uplink communications in accordance with aspects of the present disclosure. The switching arrangement500may implement or be implemented by aspects of the wireless communications systems100and200, as described with reference toFIGS.1and2. For example, the switching arrangement500illustrates example arrangements that may be indicated by a base station105to a UE115via a dynamic switching field in DCI. The base station105and the UE115may represent examples of a base station105and a UE115as described with reference toFIGS.1through4. In this case, the dynamic switching field may indicate arrangements for a UE115to switch between an sTRP transmission scheme, a TDM scheme, and an FDM scheme. In the TDM and FDM schemes, the UE115may switch between sets of transmission parameters for transmission of different uplink repetitions or sets of RBs in a TDM or an FDM manner, respectively. The FDM and TDM schemes may represent an example of the FDM scheme310and the TDM scheme315, respectively, as described with reference toFIG.3.

As described with reference toFIGS.2and4, the UE115may receive control signaling (e.g., an RRC configuration) from the base station105that configures the UE115with a first SRS resource set and a second SRS resource set for uplink communications. The SRS resource sets may be configured for codebook-based PUSCH or for non-codebook-based PUSCH. The first SRS resource set may be associated with a first set of transmission parameters and a first TRP (TRP1). The second SRS resource set may be associated with a second set of transmission parameters and a second TRP (TRP2). The control signaling may additionally indicate a configuration for the UE115to support an FDM scheme, a TDM scheme, an SDM scheme, and an sTRP transmission scheme.

The UE115may receive, via the control signaling, or via a second control signal (e.g., a second RRC message), an indication of a first uplink switching mode or a second uplink switching mode for the UE115, as described in further detail with reference toFIG.4. The UE115may receive scheduling DCI505from the base station105that includes a dynamic switching field configured to indicate a communications scheme of a subset of communications schemes associated with the indicated uplink switching mode and a switching arrangement for the UE115to use for transmitting the uplink data message. The switching arrangement may indicate whether the UE115is to use the first SRS resource set, the second SRS resource set, or both, and an order for the UE115to switch between sets of transmission parameters corresponding to the SRS resource sets. In some examples, the value of the dynamic switching field may be interpreted differently based on which uplink switching mode is configured for the UE115.

In the example ofFIG.5, the UE115may operate in the second uplink switching mode (e.g., a TDM-FDM mode).FIG.5illustrates an example values of the dynamic switching field in the DCI505and corresponding switching arrangements for the UE115to use for communicating an uplink data message using one or more sets of transmission parameters and the sTRP transmission scheme, the TDM scheme, or the FDM scheme. The dynamic switching field in the DCI505may include two bits, three bits, or some other quantity of bits.

In a first example, the dynamic switching field may include three bits that may indicate a set of values (e.g., eight values). Each value may indicate a respective communications scheme and corresponding switching arrangement for the UE115to use to transmit uplink repetitions. For example, each value (e.g., each codepoint) may index or point to a respective switching arrangement in a table configured for the UE115. In some examples, one or more of the values may be reserved, or may not point to a switching arrangement. Table 3 andFIG.5illustrate example codepoint values and corresponding switching arrangements for switching between TDM, FDM, and sTRP communications if the dynamic switching field includes three bits.

As shown in Table 3 and illustrated inFIG.5, a value of the dynamic switching field may indicate whether the UE115operating in the second uplink switching mode is to transmit an uplink data message and one or more repetitions of the uplink data message in a TDM, FDM, or sTRP manner. The UE115may determine that a first set of values of the dynamic switching field (e.g., 000 and 001) are associated with sTRP communications. The UE115may transmit the uplink repetitions in a TDM fashion using a same set of transmission parameters and directed toward a single TRP.

If the dynamic switching field indicates a first value (e.g., 000), the UE115may transmit the uplink repetitions using the first set of transmission parameters indicated by the first SRI field and associated with the first TRP. If the dynamic switching field indicates a second value (e.g., 001) the UE115may transmit the uplink repetitions using the second set of transmission parameters indicated by the second SRI field and associated with the second TRP. In the example ofFIG.5, a TDRA field in the DCI may indicate a repetition number of four, and the UE115may transmit four uplink repetitions in time. Although four uplink repetitions are illustrated inFIG.5, it is to be understood that the UE115may transmit any quantity of uplink repetitions, including no repetitions of an uplink data message.

The UE115may determine that a second set of values of the dynamic switching field (e.g., 010, 011, 100, 101) are associated with multi-TRP communications in either an FDM or SDM scheme, and each value of the second set of values may further indicate a switching arrangement for the UE115to switch between sets of transmission parameters for transmission of the uplink repetitions. If the dynamic switching field indicates a third value (e.g., 010), the UE115may transmit the uplink repetitions in a TDM manner, and the UE115may switch between the first and second sets of transmission parameters in a first order (e.g., TRP1, TRP2). For example, the UE115may transmit a first repetition in accordance with the first set of transmission parameters and a second repetition in accordance with the second set of parameters, and the UE115may continue to alternate the transmission parameters in this order for remaining uplink repetitions.

If the dynamic switching field indicates a fourth value (e.g., 011), the UE115may transmit the uplink repetitions in a TDM manner, and the UE115may switch between the first and second sets of transmission parameters in a second order (e.g., TRP2, TRP1). For example, the UE115may transmit a first repetition in accordance with the second set of transmission parameters and a second repetition in accordance with the first set of parameters, and the UE115may continue to alternate the transmission parameters in this order for remaining uplink repetitions.

If the dynamic switching field indicates a fifth value (e.g., 100), the UE115may transmit the uplink data message in an FDM manner, and the UE115may switch between the first and second sets of transmission parameters in a first order (e.g., TRP1, TRP2). For example, the UE115may transmit a first subset of RBs of the uplink data message in accordance with the first set of transmission parameters and a second subset of RBs of the uplink data message in accordance with the second set of parameters. If the dynamic switching field indicates a sixth value (e.g., 101), the UE115may transmit the uplink data message in an FDM manner, and the UE115may switch between the first and second sets of transmission parameters in a second order (e.g., TRP2, TRP1). For example, the UE115may transmit a first subset of RBs of the uplink data message in accordance with the second set of transmission parameters and a second subset of RBs of the uplink data message in accordance with the first set of parameters.

In some examples, the UE115may not support uplink repetitions for an uplink data message transmitted using the FDM scheme. That is, the UE115may not expect to receive a TDRA field in the DCI505that indicates a repetition number greater than one. In such cases, if the dynamic switching field in the DCI505indicates the FDM scheme, the UE115may transmit the uplink data message using the FDM scheme based on the value of the dynamic switching field, and the UE115may refrain from repeating the uplink data message in time.

Alternatively, the UE115may support uplink repetitions for an uplink data message transmitted using the FDM scheme. If the TDRA field in the DCI505indicates a repetition number greater than one, the UE115may transmit multiple repetitions of the uplink data message using the same FDM resource configuration as indicated by the value of the dynamic switching field. The UE115may repeat the same FDM pattern in the time domain for the quantity of repetitions indicated by the TDRA field (e.g., four repetitions inFIG.5).

In some examples (not illustrated inFIG.5), the dynamic switching field may include two bits for indicating a switching arrangement for the second uplink switching mode. The two bits may be used to indicate a communications scheme between the sTRP, TDM, and FDM schemes. In such cases, a first set of values of the dynamic switching field (e.g., 00 and 01) may indicate an sTRP scheme for transmitting the uplink repetitions in accordance with either the first or second set of transmission parameters. Such sTRP switching arrangements may be similar to the sTRP scheme described with reference to Table 1, or with reference to codepoints 000 and 001 in Table 3 andFIG.5.

A second set of values of the dynamic switching field (e.g., 10 and 11) may be associated with multiple TRPs. The UE115may determine whether the second set of values indicate a TDM scheme or an FDM scheme based on a value of the TDRA field in the DCI. For example, if a repetition number indicated by the TDRA field is greater than one, the UE115may determine that the codepoints 10 and 11 indicate the TDM communications scheme, and if the TDRA row in the TDRA field is not configured with a repetition number or is configured with a repetition number of one, the UE115may determine that the codepoints 10 and 11 indicate the FDM scheme.

Regardless of whether the TDRA field indicates the TDM scheme or the FDM scheme, the codepoints 10 and 11 may indicate a corresponding order for the UE115to switch between the first and second sets of transmission parameters in accordance with the respective scheme. If the TDRA field indicates TDM, the codepoints 10 and 11 may indicate a same order for the UE115as the codepoints 10 and 11 described with reference to Table 1, or as codepoints 010 and 011 described with reference to Table 3 andFIG.5. If the TDRA field indicates the FDM scheme, the codepoints 10 and 11 may indicate a same order for the UE115as the codepoints 100 and 101 described with reference to Table 3 andFIG.5.

The UE115may thereby receive RRC signaling that indicates one of a first or a second uplink switching mode each associated with switching between a subset of communications schemes. A configuration of the dynamic switching field in the DCI may be based on the indicated uplink switching mode and may indicate a communications scheme of the subset associated with the indicated uplink switching mode and an order or arrangement for switching between sets of transmission parameters in accordance with the communications scheme.

FIG.6illustrates an example of a switching arrangement600that supports dynamic switching between communications schemes for uplink communications in accordance with aspects of the present disclosure. The switching arrangement600may implement or be implemented by aspects of the wireless communications systems100and200, as described with reference toFIGS.1and2. For example, the switching arrangement600illustrates example switching arrangements that may be configured by a base station105for a UE115to use for transmitting uplink repetitions in an sTRP manner, a TDM manner, an FDM manner, or an SDM manner. The base station105and the UE115may represent examples of a base station105and a UE115as described with reference toFIGS.1through5. The TDM, FDM, and SDM schemes may represent examples of corresponding communications schemes as described with reference toFIG.3.

As described with reference toFIG.2, the UE115may receive control signaling (e.g., an RRC configuration) from the base station105that configures the UE115with a first SRS resource set and a second SRS resource set for uplink communications. The SRS resource sets may be configured for codebook-based PUSCH or for non-codebook-based PUSCH. The first SRS resource set may be associated with a first set of transmission parameters and a first TRP (TRP1). The second SRS resource set may be associated with a second set of transmission parameters and a second TRP (TRP2). The control signaling may additionally indicate a configuration for the UE115to support an FDM communications scheme, a TDM communications scheme, an SDM communications scheme, and an sTRP communications scheme.

The UE115may receive a scheduling DCI605from the base station105that includes a dynamic switching field configured to indicate a communications scheme of the multiple communications schemes configured for the UE115and a switching arrangement for the UE115to use for transmitting the uplink repetitions. The switching arrangement may indicate whether the UE115is to use the first SRS resource set, the second SRS resource set, or both, and an order for the UE115to switch between sets of transmission parameters corresponding to the SRS resource sets. In the example ofFIG.6, the dynamic switching field may indicate a communications scheme from any of the TDM, FDM, SDM, and sTRP transmission schemes (e.g., irrespective of an indication of an uplink switching mode for the UE115).

To indicate the communications scheme and corresponding switching arrangement as described herein, the dynamic switching field in the DCI605may include a first quantity of bits (e.g., three bits) that may indicate a set of values (e.g., eight values). Each value may indicate a respective communications scheme and corresponding switching arrangement for the UE115to use to transmit uplink repetitions. For example, each value (e.g., each codepoint) may index or point to a respective switching arrangement in a table configured for the UE115. Table 4 illustrates example codepoint values and corresponding switching arrangements for switching between TDM, FDM, SDM, and sTRP communications if the dynamic switching field includes three bits.

As shown in Table 4 and illustrated inFIG.6, the value of the dynamic switching field in the DCI605may schedule the UE115to transmit an uplink data message, one or more uplink repetitions of the uplink data message, or both, according to any one of the TDM, FDM, and SDM communications schemes. The value of the dynamic switching field may, in some cases, additionally indicate an order for the UE115to switch between sets of transmission parameters for transmitting portions or repetitions of the uplink data message. A portion of the uplink data message may include a set of RBs or a set of spatial layers.

A first set of values of the dynamic switching field may represent examples of the codepoints described with reference toFIG.5and Table 3. For example, the first set of values may indicate either an sTRP transmission scheme (e.g., 000 and 001), a TDM scheme (e.g., 010 and 011), or an FDM scheme (e.g., 100 and 101) and a corresponding switching arrangement for switching between sets of transmission parameters in accordance with the indicated communications schemes. Such switching arrangements are described in further detail with respect toFIG.4and Table 3.

Remaining values of the dynamic switching field (e.g., 110 and 111) may indicate the SDM transmission scheme. That is, the fifth and sixth values of the dynamic switching field may indicate that the UE115is to transmit a first set of spatial layers and a second set of spatial layers of the uplink data message in accordance with different sets of transmission parameters.

If the dynamic switching field indicates a fifth value (e.g., 110), the UE115may transmit a first set of one or more spatial layers according to the first set of transmission parameters indicated by the first SRI field and a second set of one or more spatial layers according to the second set of transmission parameters indicated by the second SRI field. The first set of spatial layers may be transmitted to a first TRP and the second set of spatial layers may be transmitted to a second TRP. If the dynamic switching field indicates a sixth value (e.g., 111), the UE115may transmit the first set of one or more spatial layers according to the second set of transmission parameters indicated by the first SRI field and the second set of one or more spatial layers according to the first set of transmission parameters indicated by the second SRI field. The first set of spatial layers may be transmitted to the second TRP and the second set of spatial layers may be transmitted to the first TRP.

A quantity of spatial layers in each set may be based on values of the first and second SRI fields in the DCI605, as described with reference toFIG.4. The UE115may or may not support uplink repetitions for the SDM scheme. For example, the UE115may refrain from transmitting repetitions of the uplink data message if the DCI605indicates the SDM scheme, or the UE115may transmit repetitions of the uplink data message by repeating the SDM switching arrangement for each uplink repetition. In some examples, the fifth and sixth codepoints in Table 4 may indicate similar switching arrangements as the third and fourth codepoints, respectively in Table 2 and as described with respect toFIG.4.

The base station105may thereby indicate, to the UE115, a switching arrangement for transmitting one or more uplink data messages in accordance with any of the TDM, FDM, SDM, and sTRP transmission schemes. Such techniques may provide for the UE115to switch between communications schemes for uplink communications with reduced latency and improved communication reliability.

FIG.7illustrates an example of an SRI configuration700that supports dynamic switching between communications schemes for uplink communications in accordance with aspects of the present disclosure. The SRI configuration700may implement or be implemented by aspects of the wireless communications systems100and200as described with reference toFIGS.1and2. For example, the SRI configuration700illustrates an example configuration of a first SRI field705-aand a second SRI field705-bthat support communications according to TDM, FDM, SDM, and sTRP schemes. The SRI fields705in a DCI may be transmitted by a base station105to a UE115via a PDCCH. The base station105and the UE115may represent examples of a base station105and a UE115as described with reference toFIGS.1through6. In this case, the base station105may utilize a subset715of values or bits of each SRI field705to indicate SRS resources for the SDM scheme, which may support efficient utilization of resources and reduced overhead for switching between multiple communications schemes.

As described herein, the UE115may receive RRC signaling that indicates a TDM, FDM, SDM, and sTRP scheme and that configures two SRS resource sets710for the UE115. The UE115may support one of the TDM, FDM, SDM, and sTRP schemes at any given time. The UE115may switch between the communications schemes in accordance with an indication received via a dynamic switching field in the DCI. The dynamic switching field may indicate any of the TDM, FDM, SDM, and sTRP schemes, as described with reference toFIG.6and Table 4.

FIG.7illustrates a single SRS resource set710for clarity purposes. However, it is to be understood that the UE115may be configured with two SRS resource sets710that may be the same or different. The SRS resource set710may represent both a first SRS resource set710and a second SRS resource set710that share a same configuration. In the example ofFIG.7, the SRS resource sets710may include four SRS resources, although it is to be understood that an SRS resource set710may include any quantity of SRS resources.

The DCI that schedules one or more uplink messages may include a first SRI field705-aand a second SRI field705-b. The first SRI field705-amay indicate an SRS resource from the first SRS resource set710and the second SRI field705-bmay indicate an SRS resource from the second SRS resource set710. The indicated SRS resources may be associated with one or more antenna ports, and the UE115may transmit an uplink message or a portion of an uplink message (e.g., one or more RBs or one or more spatial layers) using a same quantity of antenna ports (e.g., a same rank or same quantity of spatial layers) as the indicated SRS resource(s). Each SRS resource may be associated with a single antenna port or one or more antenna ports, for non-codebook-based PUSCH and codebook-based PUSCH, respectively, as described in further detail with reference toFIG.2. In the example ofFIG.7, a maximum rank for TDM communications may be four, and a total maximum rank for SDM communications may be four. As such, a maximum rank for each SRS resource set710(e.g., and corresponding set of spatial layers) may be two for SDM communications.

The UE115may determine whether to use transmission parameters indicated via the first SRI field705-ain the DCI, the second SRI field705-bin the DCI, or both, based on the value of the dynamic switching field in the DCI. Uplink repetitions transmitted in a TDM manner may each include a same quantity of spatial layers. That is, a rank and quantity of demodulation reference signal (DMRS) ports may be the same across all uplink repetitions for TDM communications. If the dynamic switching field indicates that the UE115is to switch between transmission parameters for transmitting the uplink repetitions in the TDM manner, the first SRI field705-afor TDM will indicate a quantity of the spatial layers (e.g., a rank), and the second SRI field705-bfor TDM will not indicate a rank. As such, a size of the second SRI field705-bmay be smaller than a size of the first SRI field705-afor the TDM scheme. For example, inFIG.7, the first SRI field705-afor TDM may indicate a rank of two, and the second SRI field705-bfor TDM may indicate SRS resources from among the SRS resource set710that are associated with a rank of two (e.g., instead of indicating one or more SRS resources from all of the SRS resources in the SRS resource set710). For codebook-based PUSCH, in some examples, the SRI fields705-aand705-bmay be TPMI fields that may indicate a respective rank and quantity of spatial layers for the uplink data message.

If the dynamic switching field indicates that the UE115is to switch between transmission parameters for transmitting different sets of spatial layers in an SDM fashion, the first SRI705-amay indicate a first quantity of spatial layers and the second SRI705-bmay indicate a second quantity of spatial layers that may be the same as or different than the first quantity. That is, the second SRI705-bmay point to any of the SRS resources from the SRS resource set710irrespective of a value of the first SRI705-a. However, for SDM communications, a maximum rank for each SRS resource set710may be less than a maximum rank for TDM communications. For example, a rank combination for two sets of TDM repetitions may be four and four, and a maximum rank for all spatial layers of an uplink message transmitted in an SDM fashion may be four.

As such, the first SRI705-amay indicate a first subset of resources from the first SRS resource set710for SDM, and the second SRI705-bmay indicate a second subset of SRS resources from the second SRS resource set710for SDM. A quantity of the first subset of SRS resources may be the first X SRS resources in the first SRS resource set710, where

A quantity of the second subset of SRS resources may be the first Y SRS resources in the second SRS resource set710, where

NSRS1and NSRS2may correspond to quantities of SRS resources in the first and second SRS resource sets, respectively, and Lmaxmay correspond to a maximum rank or quantity of spatial layers for SDM (e.g., a total maximum rank).

To improve utilization of the SRI fields705-aand705-bfor both TDM and SDM communications, each value of the SRI fields705-aand705-bmay be used to indicate SRS resources for TDM communications, and a subset715of values (e.g., a subset of SRI codepoints) of the SRI fields705-aand705-bmay be used to indicate one or more SRS resources from the first and second SRS resource sets710, respectively, for SDM communications. A quantity of bits to indicate any of the first or second subsets of SRS resources for SDM communications may be the same as or less than the first and second quantity of bits for TDM communications. As such, a subset715or all of the bits in the SRI fields705-aand705-bmay be used for SDM communications.

For example, the SRI field705-amay include a first quantity of bits (e.g., three bits) that supports an indication of any of the SRS resources from the SRS resource set710for TDM communications. The subset715-aof the SRI field705-amay be used to indicate SRS resources from the first subset of SRS resources for SDM communications. The SRI field705-bmay include a second quantity of bits (e.g., two bits) that supports an indication of any of the SRS resources associated with a single rank in the SRS resource set710for TDM communications. The subset715-bof the SRI field705-bmay be used to indicate SRS resources from the second subset of SRS resources for SDM communications. If the dynamic switching field in the DCI indicates the SDM scheme, the base station105may pad the subsets715-aand715-bof the SRI fields705-aand705-b, respectively (e.g., zero-padding the SRIs) to match the SRI size for TDM communications.

The SRI fields705in the DCI may thereby be used for any one of TDM, FDM, and SDM communications at any given time. The SRI fields705may include a quantity of bits that support SRS resource indications for TDM, and a subset715of each SRI field705may be used for SRS resource indications for SDM. In some examples, the first and second SRI fields705-aand705-bmay be used to indicate SRS resources for non-codebook-based PUSCH communications. In some other examples, such as for codebook-based PUSCH communications, the SRI fields705may represent examples of TPMI fields, and the subsets715-aand715-bmay represent sub-TPMIs for indication of respective precoding matrices. Such techniques may provide for the UE115to switch between multiple communications schemes, which may improve communication reliability and reduce latency.

FIG.8illustrates an example of an SRI configuration800that supports dynamic switching between communications schemes for uplink communications in accordance with aspects of the present disclosure. The SRI configuration800may implement or be implemented by aspects of the wireless communications systems100and200as described with reference toFIGS.1and2. For example, the SRI configuration800illustrates an example configuration of a first SRI field805. In this case, the first SRI field805may be divided into two or more subsets815to support SDM communications. The SRI field805in a DCI may be transmitted by a base station105to a UE115via a PDCCH. The base station105and the UE115may represent examples of a base station105and a UE115as described with reference toFIGS.1through7.

The UE115may receive RRC signaling that indicates TDM, FDM, SDM, and sTRP schemes and that configures two SRS resource sets810for the UE115. The UE115may support one of the TDM, FDM, SDM, and sTRP schemes at any given time. The UE115may switch between the communications schemes in accordance with an indication received via a dynamic switching field in the DCI. The dynamic switching field may indicate any of the TDM, FDM, SDM, and sTRP schemes, as described with reference toFIG.6and Table 4.

FIG.8illustrates a single SRS resource set810for clarity purposes. However, it is to be understood that the UE115may be configured with two SRS resource sets810that may be the same or different. The SRS resource set810may represent both a first SRS resource set810and a second SRS resource set810that share a same configuration. In the example ofFIG.8, the SRS resource sets810may include four SRS resources, although it is to be understood that an SRS resource set810may include any quantity of SRS resources.

The DCI that schedules one or more uplink messages may include a first SRI field805, a second SRI field805(not pictured inFIG.8), or both. The UE115may determine whether to use transmission parameters indicated via the first SRI field805, the second SRI field805, or both, based on the value of the dynamic switching field in the DCI and a communications scheme indicated to the UE115. As described in further detail with reference toFIG.7, a size of SRI fields805may be different for different communications schemes. For example, an SRI field805may include a first quantity of bits (e.g., four bits) to support SRS resource indications for TDM communications and a second quantity of bits (e.g., two bits) that is less than the first quantity of bits to support SRS resource indications for SDM communications.

To improve shared utilization of the SRI fields805for any one of TDM, FDM, and SDM communications schemes at a given time, the first SRI field805may be divided into two subsets815to support SDM communications. That is, when the dynamic switching field in the DCI indicates the SDM scheme, the first SRI field805may be interpreted as two subsets815-aand815-b(e.g., sub-SRIs) for indication of one or more SRS resources from the first and second SRS resource sets, respectively. The second SRI field805may be used to for SRS resource indications from the second SRS resource set for TDM communications, and the second SRI field805may not be used when the dynamic switching field indicates SDM.

For example, the SRI field805may include a first quantity of bits (e.g., four bits) that supports an indication of any of the SRS resources from the SRS resource set810for TDM communications. A first subset815-aof the SRI field805may include a first quantity of bits (e.g., two bits) that supports an indication of one or more SRS resources from a first SRS resource set810for a set of spatial layers of an uplink message, and a second subset815-bof the SRI field805may include a second quantity of bits (e.g., two bits) that may be the same as or different than the first quantity of bits and may support an indication of one or more SRS resources from a second SRS resource set810for a second set of spatial layers of the uplink data message.

A quantity of bits to indicate any of the first or second subsets of SRS resources for SDM communications may be the same as or less than the first and second quantity of bits for TDM communications. As such, a total quantity of bits associated with the subsets815-aand815-bmay be less than or the same as a quantity of bits in the SRI field805.

The SRI fields805in the DCI may thereby be used for any one of TDM, FDM, and SDM communications at any given time. The first SRI field805may include a quantity of bits that support SRS resource indications for TDM, and first and second subsets815of the first SRI field805may be used for SRS resource indications for SDM. In some examples, the first and second SRI fields805may be used to indicate SRS resources for non-codebook-based PUSCH communications. In some other examples, such as for codebook-based PUSCH communications, the SRI fields805may represent examples of TPMI fields, and the subsets815-aand815-bmay represent sub-TPMIs for indication of respective precoding matrices. Such techniques may provide for the UE115to switch between multiple communications schemes, which may improve communication reliability and reduce latency.

FIG.9illustrates an example of a process flow900that supports dynamic switching between communications schemes for uplink communications in accordance with aspects of the present disclosure. The process flow900may implement or be implemented by aspects of the wireless communications systems100and200as described with reference toFIGS.1and2, respectively. For example, the process flow900may implement or be implemented by a UE115-band a base station105-b, which may be examples of a UE115and a base station105as described with reference toFIGS.1through8. The UE115-bmay switch between a TDM scheme, an FDM scheme, an SDM scheme, and an sTRP scheme for uplink communications.

In the following description of the process flow900, the operations between the UE115-band the base station105-bmay be performed in different orders or at different times. Some operations may also be left out of the process flow900, or other operations may be added. Although the base station105-band the UE115-bare shown performing the operations of the process flow900, some aspects of some operations may also be performed by one or more other wireless devices.

At905, the base station105-bmay transmit control signaling to the UE115-b. The control signaling may indicate a configuration of a set of communications schemes for uplink communications by the UE115-b. The set of communications schemes may include an FDM scheme, a TDM scheme, an SDM scheme, and an sTRP scheme (e.g., among other communications schemes).

At910, the base station105-bmay transmit DCI to the UE115-b. The DCI may schedule an uplink data message. The DCI may indicate one or more SRS resource sets associated with the uplink data message. In some examples, the DCI may include a dynamic switching field that is configured to indicate a communications scheme and a switching arrangement between the set of communications schemes.

At915, in some examples, the UE115-bmay determine a switching arrangement between the set of communications schemes. The switching arrangement may be indicated to the UE115-bby one or more of: the control signaling, the DCI, or the one or more SRS resource sets. In some examples, the UE115-bmay be configured with a first SRS resource set and a second SRS resource set, and the switching arrangement may indicate an arrangement for transmitting a first portion or repetition of the uplink data message in accordance with a first set of transmission parameters associated with the first SRS resource set and for transmitting a second portion or repetition of the uplink data message in accordance with a second set of parameters associated with the second SRS resource set.

At920, the UE115-bmay transmit the uplink data message to the base station105-bin accordance with the switching arrangement. In some examples, the UE115-bmay transmit the uplink data message using one of the TDM, FDM, or SDM schemes and in accordance with two or more sets of transmission parameters based on the switching arrangement.

The receiver1010may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to dynamic switching between communications schemes for uplink communications). Information may be passed on to other components of the device1005. The receiver1010may utilize a single antenna or a set of multiple antennas.

The communications manager1020, the receiver1010, the transmitter1015, or various combinations thereof or various components thereof may be examples of means for performing various aspects of dynamic switching between communications schemes for uplink communications as described herein. For example, the communications manager1020, the receiver1010, the transmitter1015, or various combinations or components thereof may support a method for performing one or more of the functions described herein.

In some examples, the communications manager1020may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the receiver1010, the transmitter1015, or both. For example, the communications manager1020may receive information from the receiver1010, send information to the transmitter1015, or be integrated in combination with the receiver1010, the transmitter1015, or both to receive information, transmit information, or perform various other operations as described herein.

The communications manager1020may support wireless communication at a UE in accordance with examples as disclosed herein. For example, the communications manager1020may be configured as or otherwise support a means for receiving control signaling that indicates a configuration of a set of multiple communications schemes for uplink communications by the UE, the set of multiple communications schemes including an FDM scheme, a TDM scheme, an SDM scheme, and an sTRP transmission scheme. The communications manager1020may be configured as or otherwise support a means for receiving DCI that schedules an uplink data message and indicates one or more SRS resource sets associated with the uplink data message, where a switching arrangement between the set of multiple communications schemes is indicated for the uplink data message by one or more of: the control signaling, the DCI, or the one or more SRS resource sets. The communications manager1020may be configured as or otherwise support a means for transmitting the uplink data message in accordance with the switching arrangement.

By including or configuring the communications manager1020in accordance with examples as described herein, the device1005(e.g., a processor controlling or otherwise coupled to the receiver1010, the transmitter1015, the communications manager1020, or a combination thereof) may support techniques for reduced processing, improved utilization of communication resources, and reduced processing latency. For example, the processor of the device1005(e.g., a UE115) may support dynamic switching between multiple communications schemes, which may improve reliability and reduce processing as compared with systems in which the device1005does not support switching between communications schemes. The device1005may receive an indication of a communications scheme and a switching arrangement for uplink communications via one or more control messages, such as an RRC message, a MAC-CE, or DCI that include fields or information elements configured to indicate a communications scheme from the multiple communications schemes. The described control signaling may improve utilization of communication resources for uplink communications.

The receiver1110may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to dynamic switching between communications schemes for uplink communications). Information may be passed on to other components of the device1105. The receiver1110may utilize a single antenna or a set of multiple antennas.

The device1105, or various components thereof, may be an example of means for performing various aspects of dynamic switching between communications schemes for uplink communications as described herein. For example, the communications manager1120may include a control signaling component1125, a DCI component1130, an uplink data message component1135, or any combination thereof. The communications manager1120may be an example of aspects of a communications manager1020as described herein. In some examples, the communications manager1120, or various components thereof, may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the receiver1110, the transmitter1115, or both. For example, the communications manager1120may receive information from the receiver1110, send information to the transmitter1115, or be integrated in combination with the receiver1110, the transmitter1115, or both to receive information, transmit information, or perform various other operations as described herein.

The communications manager1120may support wireless communication at a UE in accordance with examples as disclosed herein. The control signaling component1125may be configured as or otherwise support a means for receiving control signaling that indicates a configuration of a set of multiple communications schemes for uplink communications by the UE, the set of multiple communications schemes including an FDM scheme, a TDM scheme, an SDM scheme, and an sTRP transmission scheme. The DCI component1130may be configured as or otherwise support a means for receiving DCI that schedules an uplink data message and indicates one or more SRS resource sets associated with the uplink data message, where a switching arrangement between the set of multiple communications schemes is indicated for the uplink data message by one or more of: the control signaling, the DCI, or the one or more SRS resource sets. The uplink data message component1135may be configured as or otherwise support a means for transmitting the uplink data message in accordance with the switching arrangement.

FIG.12shows a block diagram1200of a communications manager1220that supports dynamic switching between communications schemes for uplink communications in accordance with aspects of the present disclosure. The communications manager1220may be an example of aspects of a communications manager1020, a communications manager1120, or both, as described herein. The communications manager1220, or various components thereof, may be an example of means for performing various aspects of dynamic switching between communications schemes for uplink communications as described herein. For example, the communications manager1220may include a control signaling component1225, a DCI component1230, an uplink data message component1235, a switching arrangement component1240, an RRC component1245, a MAC-CE component1250, an uplink switching mode component1255, a communications scheme component1260, or any combination thereof. Each of these components may communicate, directly or indirectly, with one another (e.g., via one or more buses).

The communications manager1220may support wireless communication at a UE in accordance with examples as disclosed herein. The control signaling component1225may be configured as or otherwise support a means for receiving control signaling that indicates a configuration of a set of multiple communications schemes for uplink communications by the UE, the set of multiple communications schemes including an FDM scheme, a TDM scheme, an SDM scheme, and an sTRP transmission scheme. The DCI component1230may be configured as or otherwise support a means for receiving DCI that schedules an uplink data message and indicates one or more SRS resource sets associated with the uplink data message, where a switching arrangement between the set of multiple communications schemes is indicated for the uplink data message by one or more of: the control signaling, the DCI, or the one or more SRS resource sets. The uplink data message component1235may be configured as or otherwise support a means for transmitting the uplink data message in accordance with the switching arrangement.

In some examples, to support receiving the DCI, the switching arrangement component1240may be configured as or otherwise support a means for receiving a switching indication field, where a value of the switching indication field indicates the switching arrangement between the set of multiple communications schemes for the uplink data message.

In some examples, the one or more SRS resource sets indicated via the DCI include a first SRS resource set and a second SRS resource set associated with the uplink data message. In some examples, the switching arrangement indicates an arrangement for transmitting a first portion or a first repetition of the uplink data message in accordance with a first set of parameters associated with the first SRS resource set and for transmitting a second portion or a second repetition of the uplink data message in accordance with a second set of parameters associated with the second SRS resource set.

In some examples, to support receiving the control signaling, the uplink switching mode component1255may be configured as or otherwise support a means for receiving an RRC message that indicates an uplink switching mode for the UE, the uplink switching mode associated with a switch between a subset of communications schemes of the set of multiple communications schemes and selected from one of a first uplink switching mode and a second uplink switching mode. In some examples, the first uplink switching mode may be associated with a first subset of communications schemes including the SDM scheme and the sTRP transmission scheme. In some examples the uplink switching mode may be associated with a second subset of communications schemes including the FDM scheme, the TDM scheme, and the sTRP transmission scheme.

In some examples, the communications scheme component1260may be configured as or otherwise support a means for determining a communications scheme of the set of multiple communications schemes for transmitting the uplink data message based on the indicated uplink switching mode and the value of the switching indication field, where each value of the switching indication field indicates a respective communications scheme of the subset of communications schemes associated with the uplink switching mode.

In some examples, the uplink switching mode is the first uplink switching mode, and the communications scheme component1260may be configured as or otherwise support a means for determining whether a communications scheme of the set of multiple communications schemes for transmitting the uplink data message is the SDM scheme or the sTRP transmission scheme based on the value of the switching indication field. In some examples, a first set of values of the switching indication field may indicate the sTRP transmission scheme, and a second set of values of the switching indication field may indicate the SDM scheme.

In some examples, the uplink switching mode is the second uplink switching mode, and the communications scheme component1260may be configured as or otherwise support a means for determining that a communications scheme of the set of multiple communications schemes for transmitting a set of multiple sets of repetitions of the uplink data message is associated with multiple TRPs based on one or more first values of the switching indication field and a value of a TDRA field in the DCI, where the value of the TDRA field of the DCI indicates whether the communications scheme is the FDM scheme or the TDM scheme.

In some examples, the switching arrangement component1240may be configured as or otherwise support a means for determining the switching arrangement and a communications scheme of the set of multiple communications schemes for transmitting the uplink data message based on the value of the switching indication field, where each value of a set of multiple values of the switching indication field indicates a respective switching arrangement of a set of multiple switching arrangements and a respective communications scheme of the set of multiple communications schemes for transmitting the uplink data message.

In some examples, the DCI further includes a first resource indication field associated with a first set of multiple values and a second resource indication field associated with a second set of multiple values. In some examples, a first subset of values of the first set of multiple values is associated with resource indications for a first SRS resource set based on the switching indication field indicating the SDM scheme. In some examples, a second subset of values of the second set of multiple values is associated with resource indications for a second SRS resource set based on the switching indication field indicating the SDM scheme.

In some examples, the DCI further includes a first resource indication field associated with a first set of multiple values and a second resource indication field associated with a second set of multiple values. In some examples, a first subset of values of the first set of multiple values is associated with resource indications for a first SRS resource set based on the switching indication field indicating the SDM scheme. In some examples, a second subset of values of the first set of multiple values is associated with resource indications for a second SRS resource set based on the switching indication field indicating the SDM scheme.

In some examples, to support receiving the control signaling, the RRC component1245may be configured as or otherwise support a means for receiving an RRC message that indicates two or more SRS resource sets for the UE, where the RRC message indicates a communications scheme of the set of multiple communications schemes for transmission of the uplink data message, and where transmitting the uplink data message is based on the communications scheme indicated via the RRC message.

In some examples, the communications scheme component1260may be configured as or otherwise support a means for determining the communications scheme based on the RRC message and a frequency band on which the uplink data message is transmitted, where the RRC message indicates a respective communications scheme of the set of multiple communications schemes for each frequency band of a set of multiple frequency bands.

In some examples, the communications scheme component1260may be configured as or otherwise support a means for determining the communications scheme based on the RRC message and a configuration of the DCI, where the RRC message indicates a respective communications scheme of the set of multiple communications schemes for each type of the DCI of a set of multiple types.

In some examples, to support receiving the control signaling, the MAC-CE component1250may be configured as or otherwise support a means for receiving a MAC-CE that indicates a communications scheme of the set of multiple communications schemes for transmission of the uplink data message, where transmitting the uplink data message is based on the communications scheme indicated via the MAC-CE.

In some examples, the control signaling component1225may be configured as or otherwise support a means for receiving an RRC message that indicates two SRS resource sets for the UE, where the MAC-CE disables a first SRS resource set of the two SRS resource sets, and where a presence of a switching indication field in the DCI is based on disabling the first SRS resource set.

FIG.13shows a diagram of a system1300including a device1305that supports dynamic switching between communications schemes for uplink communications in accordance with aspects of the present disclosure. The device1305may be an example of or include the components of a device1005, a device1105, or a UE115as described herein. The device1305may communicate wirelessly with one or more base stations105, UEs115, or any combination thereof. The device1305may include components for bi-directional voice and data communications including components for transmitting and receiving communications, such as a communications manager1320, an input/output (I/O) controller1310, a transceiver1315, an antenna1325, a memory1330, code1335, and a processor1340. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus1345).

The I/O controller1310may manage input and output signals for the device1305. The I/O controller1310may also manage peripherals not integrated into the device1305. In some cases, the I/O controller1310may represent a physical connection or port to an external peripheral. In some cases, the I/O controller1310may utilize an operating system such as iOS®, ANDROID®, MS-DOS®, MS-WINDOWS®, OS/2®, UNIX®, LINUX®, or another known operating system. Additionally or alternatively, the I/O controller1310may represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device. In some cases, the I/O controller1310may be implemented as part of a processor, such as the processor1340. In some cases, a user may interact with the device1305via the I/O controller1310or via hardware components controlled by the I/O controller1310.

In some cases, the device1305may include a single antenna1325. However, in some other cases, the device1305may have more than one antenna1325, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver1315may communicate bi-directionally, via the one or more antennas1325, wired, or wireless links as described herein. For example, the transceiver1315may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver1315may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas1325for transmission, and to demodulate packets received from the one or more antennas1325. The transceiver1315, or the transceiver1315and one or more antennas1325, may be an example of a transmitter1015, a transmitter1115, a receiver1010, a receiver1110, or any combination thereof or component thereof, as described herein.

The memory1330may include random access memory (RAM) and read-only memory (ROM). The memory1330may store computer-readable, computer-executable code1335including instructions that, when executed by the processor1340, cause the device1305to perform various functions described herein. The code1335may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some cases, the code1335may not be directly executable by the processor1340but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some cases, the memory1330may contain, among other things, a basic I/O system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.

The processor1340may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, the processor1340may be configured to operate a memory array using a memory controller. In some other cases, a memory controller may be integrated into the processor1340. The processor1340may be configured to execute computer-readable instructions stored in a memory (e.g., the memory1330) to cause the device1305to perform various functions (e.g., functions or tasks supporting dynamic switching between communications schemes for uplink communications). For example, the device1305or a component of the device1305may include a processor1340and memory1330coupled to the processor1340, the processor1340and memory1330configured to perform various functions described herein.

The communications manager1320may support wireless communication at a UE in accordance with examples as disclosed herein. For example, the communications manager1320may be configured as or otherwise support a means for receiving control signaling that indicates a configuration of a set of multiple communications schemes for uplink communications by the UE, the set of multiple communications schemes including an FDM scheme, a TDM scheme, an SDM scheme, and an sTRP transmission scheme. The communications manager1320may be configured as or otherwise support a means for receiving DCI that schedules an uplink data message and indicates one or more SRS resource sets associated with the uplink data message, where a switching arrangement between the set of multiple communications schemes is indicated for the uplink data message by one or more of: the control signaling, the DCI, or the one or more SRS resource sets. The communications manager1320may be configured as or otherwise support a means for transmitting the uplink data message in accordance with the switching arrangement.

By including or configuring the communications manager1320in accordance with examples as described herein, the device1305may support techniques for improved communication reliability, reduced latency, more efficient utilization of communication resources, and improved coordination between devices. For example, the device1305(e.g., a UE115) may transmit one or more uplink data messages using a TDM, FDM, SDM, or sTRP scheme. The device1305may switch between the communications schemes at any given time based on an indication received via one or more of an RRC message, DCI, or a MAC-CE. By supporting the multiple communications schemes, the device1305may perform more efficient and reliable uplink transmissions, which may improve communication reliability and reduce latency. Additionally, or alternatively, the enhanced control signaling described herein may provide for more efficient utilization of communication resources. For example, one or more uplink switching modes or bit configurations may be configured to support any of the multiple communications schemes, such that a same field or information element in the control signaling may be used to indicate any of the communications schemes.

In some examples, the communications manager1320may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the transceiver1315, the one or more antennas1325, or any combination thereof. Although the communications manager1320is illustrated as a separate component, in some examples, one or more functions described with reference to the communications manager1320may be supported by or performed by the processor1340, the memory1330, the code1335, or any combination thereof. For example, the code1335may include instructions executable by the processor1340to cause the device1305to perform various aspects of dynamic switching between communications schemes for uplink communications as described herein, or the processor1340and the memory1330may be otherwise configured to perform or support such operations.

FIG.14shows a block diagram1400of a device1405that supports dynamic switching between communications schemes for uplink communications in accordance with aspects of the present disclosure. The device1405may be an example of aspects of a base station105as described herein. The device1405may include a receiver1410, a transmitter1415, and a communications manager1420. The device1405may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

The receiver1410may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to dynamic switching between communications schemes for uplink communications). Information may be passed on to other components of the device1405. The receiver1410may utilize a single antenna or a set of multiple antennas.

The transmitter1415may provide a means for transmitting signals generated by other components of the device1405. For example, the transmitter1415may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to dynamic switching between communications schemes for uplink communications). In some examples, the transmitter1415may be co-located with a receiver1410in a transceiver module. The transmitter1415may utilize a single antenna or a set of multiple antennas.

The communications manager1420, the receiver1410, the transmitter1415, or various combinations thereof or various components thereof may be examples of means for performing various aspects of dynamic switching between communications schemes for uplink communications as described herein. For example, the communications manager1420, the receiver1410, the transmitter1415, or various combinations or components thereof may support a method for performing one or more of the functions described herein.

In some examples, the communications manager1420may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the receiver1410, the transmitter1415, or both. For example, the communications manager1420may receive information from the receiver1410, send information to the transmitter1415, or be integrated in combination with the receiver1410, the transmitter1415, or both to receive information, transmit information, or perform various other operations as described herein.

The communications manager1420may support wireless communication at a base station in accordance with examples as disclosed herein. For example, the communications manager1420may be configured as or otherwise support a means for transmitting, to a UE, control signaling that indicates a configuration of a set of multiple communications schemes for uplink communications by the UE, the set of multiple communications schemes including an FDM scheme, a TDM scheme, an SDM scheme, and an sTRP transmission scheme. The communications manager1420may be configured as or otherwise support a means for transmitting, to the UE, DCI that schedules an uplink data message and indicates one or more SRS resource sets associated with the uplink data message, where a switching arrangement between the set of multiple communications schemes is indicated for the uplink data message by one or more of: the control signaling, the DCI, or the one or more SRS resource sets. The communications manager1420may be configured as or otherwise support a means for receiving, from the UE, the uplink data message in accordance with the switching arrangement.

FIG.15shows a block diagram1500of a device1505that supports dynamic switching between communications schemes for uplink communications in accordance with aspects of the present disclosure. The device1505may be an example of aspects of a device1405or a base station105as described herein. The device1505may include a receiver1510, a transmitter1515, and a communications manager1520. The device1505may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

The receiver1510may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to dynamic switching between communications schemes for uplink communications). Information may be passed on to other components of the device1505. The receiver1510may utilize a single antenna or a set of multiple antennas.

The transmitter1515may provide a means for transmitting signals generated by other components of the device1505. For example, the transmitter1515may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to dynamic switching between communications schemes for uplink communications). In some examples, the transmitter1515may be co-located with a receiver1510in a transceiver module. The transmitter1515may utilize a single antenna or a set of multiple antennas.

The device1505, or various components thereof, may be an example of means for performing various aspects of dynamic switching between communications schemes for uplink communications as described herein. For example, the communications manager1520may include a control signaling component1525, a DCI component1530, an uplink data message component1535, or any combination thereof. The communications manager1520may be an example of aspects of a communications manager1420as described herein. In some examples, the communications manager1520, or various components thereof, may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the receiver1510, the transmitter1515, or both. For example, the communications manager1520may receive information from the receiver1510, send information to the transmitter1515, or be integrated in combination with the receiver1510, the transmitter1515, or both to receive information, transmit information, or perform various other operations as described herein.

The communications manager1520may support wireless communication at a base station in accordance with examples as disclosed herein. The control signaling component1525may be configured as or otherwise support a means for transmitting, to a UE, control signaling that indicates a configuration of a set of multiple communications schemes for uplink communications by the UE, the set of multiple communications schemes including an FDM scheme, a TDM scheme, an SDM scheme, and an sTRP transmission scheme. The DCI component1530may be configured as or otherwise support a means for transmitting, to the UE, DCI that schedules an uplink data message and indicates one or more SRS resource sets associated with the uplink data message, where a switching arrangement between the set of multiple communications schemes is indicated for the uplink data message by one or more of: the control signaling, the DCI, or the one or more SRS resource sets. The uplink data message component1535may be configured as or otherwise support a means for receiving, from the UE, the uplink data message in accordance with the switching arrangement.

FIG.16shows a block diagram1600of a communications manager1620that supports dynamic switching between communications schemes for uplink communications in accordance with aspects of the present disclosure. The communications manager1620may be an example of aspects of a communications manager1420, a communications manager1520, or both, as described herein. The communications manager1620, or various components thereof, may be an example of means for performing various aspects of dynamic switching between communications schemes for uplink communications as described herein. For example, the communications manager1620may include a control signaling component1625, a DCI component1630, an uplink data message component1635, a switching arrangement component1640, an RRC component1645, a MAC-CE component1650, an uplink switching mode component1655, or any combination thereof. Each of these components may communicate, directly or indirectly, with one another (e.g., via one or more buses).

The communications manager1620may support wireless communication at a base station in accordance with examples as disclosed herein. The control signaling component1625may be configured as or otherwise support a means for transmitting, to a UE, control signaling that indicates a configuration of a set of multiple communications schemes for uplink communications by the UE, the set of multiple communications schemes including an FDM scheme, a TDM scheme, an SDM scheme, and an sTRP transmission scheme. The DCI component1630may be configured as or otherwise support a means for transmitting, to the UE, DCI that schedules an uplink data message and indicates one or more SRS resource sets associated with the uplink data message, where a switching arrangement between the set of multiple communications schemes is indicated for the uplink data message by one or more of the control signaling, the DCI, or the one or more SRS resource sets. The uplink data message component1635may be configured as or otherwise support a means for receiving, from the UE, the uplink data message in accordance with the switching arrangement.

In some examples, to support transmitting the DCI, the switching arrangement component1640may be configured as or otherwise support a means for transmitting a switching indication field, where a value of the switching indication field indicates the switching arrangement between the set of multiple communications schemes for the uplink data message.

In some examples, the one or more SRS resource sets indicated via the DCI include a first SRS resource set and a second SRS resource set associated with the uplink data message. In some examples, the switching arrangement indicates an arrangement for transmitting a first portion or a first repetition of the uplink data message in accordance with a first set of parameters associated with the first SRS resource set and for transmitting a second portion or a second repetition of the uplink data message in accordance with a second set of parameters associated with the second SRS resource set.

In some examples, to support transmitting the control signaling, the uplink switching mode component1655may be configured as or otherwise support a means for transmitting an RRC message that indicates an uplink switching mode for the UE, the uplink switching mode associated with a switch between a subset of communications schemes of the set of multiple communications schemes and selected from one of a first uplink switching mode and a second uplink switching mode. In some examples, the first uplink switching mode may be associated with a first subset of communications schemes including the SDM scheme and the sTRP transmission scheme and the second uplink switching mode may be associated with a second subset of communications schemes including the FDM scheme, the TDM scheme, and the sTRP transmission scheme.

In some examples, each value of the switching indication field indicates a respective communications scheme of the subset of communications schemes associated with the indicated uplink switching mode.

In some examples, the uplink switching mode is the first uplink switching mode. In some examples, a first set of values of the switching indication field indicates the sTRP transmission scheme and a second set of values of the switching indication field indicates the SDM scheme. In some examples, the uplink switching mode is the second uplink switching mode. In some examples, one or more first values of the switching indication field correspond to a communications scheme of the set of multiple communications schemes that is associated with multiple TRPs. In some examples, a value of a TDRA field in the DCI indicates whether the communications scheme is the FDM scheme or the TDM scheme.

In some examples, each value of a set of multiple values of the switching indication field indicates a respective switching arrangement of a set of multiple switching arrangements and a respective communications scheme of the set of multiple communications schemes for transmitting the uplink data message.

In some examples, the DCI further includes a first resource indication field associated with a first set of multiple values and a second resource indication field associated with a second set of multiple values. In some examples, a first subset of values of the first set of multiple values is associated with resource indications for a first SRS resource set based on the switching indication field indicating the SDM scheme. In some examples, a second subset of values of the second set of multiple values is associated with resource indications for a second SRS resource set based on the switching indication field indicating the SDM scheme.

In some examples, the DCI further includes a first resource indication field associated with a first set of multiple values and a second resource indication field associated with a second set of multiple values. In some examples, a first subset of values of the first set of multiple values is associated with resource indications for a first SRS resource set based on the switching indication field indicating the SDM scheme. In some examples, a second subset of values of the first set of multiple values is associated with resource indications for a second SRS resource set based on the switching indication field indicating the SDM scheme.

In some examples, to support transmitting the control signaling, the RRC component1645may be configured as or otherwise support a means for transmitting an RRC message that indicates two or more SRS resource sets for the UE, where the RRC message indicates a communications scheme of the set of multiple communications schemes for transmission of the uplink data message, and where transmitting the uplink data message is based on the communications scheme indicated via the RRC message.

In some examples, to support transmitting the control signaling, the MAC-CE component1650may be configured as or otherwise support a means for transmitting a MAC-CE that indicates a communications scheme of the set of multiple communications schemes for transmission of the uplink data message, where transmitting the uplink data message is based on the communications scheme indicated via the MAC-CE.

In some examples, the control signaling component1625may be configured as or otherwise support a means for transmitting an RRC message that indicates two SRS resource sets for the UE, where the MAC-CE disables a first SRS resource set of the two SRS resource sets, and where a presence of a switching indication field in the DCI is based on disabling the first SRS resource set.

FIG.17shows a diagram of a system1700including a device1705that supports dynamic switching between communications schemes for uplink communications in accordance with aspects of the present disclosure. The device1705may be an example of or include the components of a device1405, a device1505, or a base station105as described herein. The device1705may communicate wirelessly with one or more base stations105, UEs115, or any combination thereof. The device1705may include components for bi-directional voice and data communications including components for transmitting and receiving communications, such as a communications manager1720, a network communications manager1710, a transceiver1715, an antenna1725, a memory1730, code1735, a processor1740, and an inter-station communications manager1745. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus1750).

In some cases, the device1705may include a single antenna1725. However, in some other cases the device1705may have more than one antenna1725, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver1715may communicate bi-directionally, via the one or more antennas1725, wired, or wireless links as described herein. For example, the transceiver1715may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver1715may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas1725for transmission, and to demodulate packets received from the one or more antennas1725. The transceiver1715, or the transceiver1715and one or more antennas1725, may be an example of a transmitter1415, a transmitter1515, a receiver1410, a receiver1510, or any combination thereof or component thereof, as described herein.

The memory1730may include RAM and ROM. The memory1730may store computer-readable, computer-executable code1735including instructions that, when executed by the processor1740, cause the device1705to perform various functions described herein. The code1735may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some cases, the code1735may not be directly executable by the processor1740but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some cases, the memory1730may contain, among other things, a BIOS which may control basic hardware or software operation such as the interaction with peripheral components or devices.

The processor1740may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, the processor1740may be configured to operate a memory array using a memory controller. In some other cases, a memory controller may be integrated into the processor1740. The processor1740may be configured to execute computer-readable instructions stored in a memory (e.g., the memory1730) to cause the device1705to perform various functions (e.g., functions or tasks supporting dynamic switching between communications schemes for uplink communications). For example, the device1705or a component of the device1705may include a processor1740and memory1730coupled to the processor1740, the processor1740and memory1730configured to perform various functions described herein.

The communications manager1720may support wireless communication at a base station in accordance with examples as disclosed herein. For example, the communications manager1720may be configured as or otherwise support a means for transmitting, to a UE, control signaling that indicates a configuration of a set of multiple communications schemes for uplink communications by the UE, the set of multiple communications schemes including an FDM scheme, a TDM scheme, an SDM scheme, and an sTRP transmission scheme. The communications manager1720may be configured as or otherwise support a means for transmitting, to the UE, DCI that schedules an uplink data message and indicates one or more SRS resource sets associated with the uplink data message, where a switching arrangement between the set of multiple communications schemes is indicated for the uplink data message by one or more of: the control signaling, the DCI, or the one or more SRS resource sets. The communications manager1720may be configured as or otherwise support a means for receiving, from the UE, the uplink data message in accordance with the switching arrangement.

In some examples, the communications manager1720may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the transceiver1715, the one or more antennas1725, or any combination thereof. Although the communications manager1720is illustrated as a separate component, in some examples, one or more functions described with reference to the communications manager1720may be supported by or performed by the processor1740, the memory1730, the code1735, or any combination thereof. For example, the code1735may include instructions executable by the processor1740to cause the device1705to perform various aspects of dynamic switching between communications schemes for uplink communications as described herein, or the processor1740and the memory1730may be otherwise configured to perform or support such operations.

At1805, the method may include receiving control signaling that indicates a configuration of a set of multiple communications schemes for uplink communications by the UE, the set of multiple communications schemes including an FDM scheme, a TDM scheme, an SDM scheme, and an sTRP transmission scheme. The operations of1805may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1805may be performed by a control signaling component1225as described with reference toFIG.12.

At1810, the method may include receiving DCI that schedules an uplink data message and indicates one or more SRS resource sets associated with the uplink data message, where a switching arrangement between the set of multiple communications schemes is indicated for the uplink data message by one or more of: the control signaling, the DCI, or the one or more SRS resource sets. The operations of1810may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1810may be performed by a DCI component1230as described with reference toFIG.12.

At1815, the method may include transmitting the uplink data message in accordance with the switching arrangement. The operations of1815may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1815may be performed by an uplink data message component1235as described with reference toFIG.12.

At1905, the method may include receiving control signaling that indicates a configuration of a set of multiple communications schemes for uplink communications by the UE, the set of multiple communications schemes including an FDM scheme, a TDM scheme, an SDM scheme, and an sTRP transmission scheme. The operations of1905may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1905may be performed by a control signaling component1225as described with reference toFIG.12.

At1910, the method may include receiving DCI that schedules an uplink data message and indicates one or more SRS resource sets associated with the uplink data message, where a switching arrangement between the set of multiple communications schemes is indicated for the uplink data message by one or more of: the control signaling, the DCI, or the one or more SRS resource sets. The operations of1910may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1910may be performed by a DCI component1230as described with reference toFIG.12.

At1915, the method may include receiving a switching indication field of the DCI, where a value of the switching indication field indicates the switching arrangement between the set of multiple communications schemes for the uplink data message. The operations of1915may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1915may be performed by a switching arrangement component1240as described with reference toFIG.12.

At1920, the method may include transmitting the uplink data message in accordance with the switching arrangement. The operations of1920may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1920may be performed by an uplink data message component1235as described with reference toFIG.12.

At2005, the method may include receiving control signaling that indicates a configuration of a set of multiple communications schemes for uplink communications by the UE, the set of multiple communications schemes including an FDM scheme, a TDM scheme, an SDM scheme, and an sTRP transmission scheme. The operations of2005may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of2005may be performed by a control signaling component1225as described with reference toFIG.12.

At2010, the method may include receiving DCI that schedules an uplink data message and indicates one or more SRS resource sets associated with the uplink data message, where a switching arrangement between the set of multiple communications schemes is indicated for the uplink data message by one or more of: the control signaling, the DCI, or the one or more SRS resource sets. The operations of2010may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of2010may be performed by a DCI component1230as described with reference toFIG.12.

At2015, the method may include receiving a switching indication field of the DCI, where a value of the switching indication field indicates the switching arrangement between the set of multiple communications schemes for the uplink data message. The operations of2015may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of2015may be performed by a switching arrangement component1240as described with reference toFIG.12.

At2020, the method may include determining the switching arrangement and a communications scheme of the set of multiple communications schemes for transmitting the uplink data message based on the value of the switching indication field, where each value of a set of multiple values of the switching indication field indicates a respective switching arrangement of a set of multiple switching arrangements and a respective communications scheme of the set of multiple communications schemes for transmitting the uplink data message. The operations of2020may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of2020may be performed by a switching arrangement component1240as described with reference toFIG.12.

At2025, the method may include transmitting the uplink data message in accordance with the switching arrangement. The operations of2025may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of2025may be performed by an uplink data message component1235as described with reference toFIG.12.

At2105, the method may include transmitting, to a UE, control signaling that indicates a configuration of a set of multiple communications schemes for uplink communications by the UE, the set of multiple communications schemes including an FDM scheme, a TDM scheme, an SDM scheme, and an sTRP transmission scheme. The operations of2105may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of2105may be performed by a control signaling component1625as described with reference toFIG.16.

At2110, the method may include transmitting, to the UE, DCI that schedules an uplink data message and indicates one or more SRS resource sets associated with the uplink data message, where a switching arrangement between the set of multiple communications schemes is indicated for the uplink data message by one or more of: the control signaling, the DCI, or the one or more SRS resource sets. The operations of2110may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of2110may be performed by a DCI component1630as described with reference toFIG.16.

At2115, the method may include receiving, from the UE, the uplink data message in accordance with the switching arrangement. The operations of2115may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of2115may be performed by an uplink data message component1635as described with reference toFIG.16.

Aspect 1: A method for wireless communication at a UE, comprising: receiving control signaling that indicates a configuration of a plurality of communications schemes for uplink communications by the UE, the plurality of communications schemes comprising an FDM scheme, a TDM scheme, an SDM scheme, and an sTRP transmission scheme; receiving DCI that schedules an uplink data message and indicates one or more SRS resource sets associated with the uplink data message, wherein a switching arrangement between the plurality of communications schemes is indicated for the uplink data message by one or more of: the control signaling, the DCI, or the one or more SRS resource sets; and transmitting the uplink data message in accordance with the switching arrangement.

Aspect 2: The method of aspect 1, wherein receiving the DCI comprises: receiving a switching indication field, wherein a value of the switching indication field indicates the switching arrangement between the plurality of communications schemes for the uplink data message.

Aspect 3: The method of aspect 2, wherein the one or more SRS resource sets indicated via the DCI comprise a first SRS resource set and a second SRS resource set associated with the uplink data message; and the switching arrangement indicates an arrangement for transmitting a first portion or a first repetition of the uplink data message in accordance with a first set of parameters associated with the first SRS resource set and for transmitting a second portion or a second repetition of the uplink data message in accordance with a second set of parameters associated with the second SRS resource set.

Aspect 4: The method of any of aspects 2 through 3, wherein receiving the control signaling comprises: receiving a RRC message that indicates an uplink switching mode for the UE, the uplink switching mode associated with a switch between a subset of communications schemes of the plurality of communications schemes and selected from one of a first uplink switching mode and a second uplink switching mode, wherein: the first uplink switching mode is associated with a first subset of communications schemes comprising the SDM scheme and the sTRP transmission scheme; and the second uplink switching mode is associated with a second subset of communications schemes comprising the FDM scheme, the TDM scheme, and the sTRP transmission scheme.

Aspect 5: The method of aspect 4, further comprising: determining a communications scheme of the plurality of communications schemes for transmitting the uplink data message based at least in part on the indicated uplink switching mode and the value of the switching indication field, wherein each value of the switching indication field indicates a respective communications scheme of the subset of communications schemes associated with the uplink switching mode.

Aspect 6: The method of aspect 4, wherein the uplink switching mode is the first uplink switching mode, the method further comprising: determining whether a communications scheme of the plurality of communications schemes for transmitting the uplink data message is the SDM scheme or the sTRP transmission scheme based at least in part on the value of the switching indication field, wherein: a first set of values of the switching indication field indicates the sTRP transmission scheme; and a second set of values of the switching indication field indicates the SDM scheme.

Aspect 7: The method of aspect 4, wherein the uplink switching mode is the second uplink switching mode, the method further comprising: determining that a communications scheme of the plurality of communications schemes for transmitting a plurality of sets of repetitions of the uplink data message is associated with multiple TRPs based at least in part on one or more first values of the switching indication field and a value of a TDRA field in the DCI, wherein the value of the TDRA field of the DCI indicates whether the communications scheme is the FDM scheme or the TDM scheme.

Aspect 8: The method of any of aspects 2 through 3, further comprising: determining the switching arrangement and a communications scheme of the plurality of communications schemes for transmitting the uplink data message based at least in part on the value of the switching indication field, wherein each value of a plurality of values of the switching indication field indicates a respective switching arrangement of a plurality of switching arrangements and a respective communications scheme of the plurality of communications schemes for transmitting the uplink data message.

Aspect 9: The method of aspect 8, wherein the DCI further comprises a first resource indication field associated with a first plurality of values and a second resource indication field associated with a second plurality of values; a first subset of values of the first plurality of values is associated with resource indications for a first SRS resource set based at least in part on the switching indication field indicating the SDM scheme; and a second subset of values of the second plurality of values is associated with resource indications for a second SRS resource set based at least in part on the switching indication field indicating the SDM scheme.

Aspect 10: The method of aspect 8, wherein the DCI further comprises a first resource indication field associated with a first plurality of values and a second resource indication field associated with a second plurality of values; a first subset of values of the first plurality of values is associated with resource indications for a first SRS resource set based at least in part on the switching indication field indicating the SDM scheme; and a second subset of values of the first plurality of values is associated with resource indications for a second SRS resource set based at least in part on the switching indication field indicating the SDM scheme.

Aspect 11: The method of any of aspects 1 through 10, wherein receiving the control signaling comprises: receiving an RRC message that indicates two or more SRS resource sets for the UE, wherein the RRC message indicates a communications scheme of the plurality of communications schemes for transmission of the uplink data message, and wherein transmitting the uplink data message is based at least in part on the communications scheme indicated via the RRC message.

Aspect 12: The method of aspect 11, further comprising: determining the communications scheme based at least in part on the RRC message and a frequency band on which the uplink data message is transmitted, wherein the RRC message indicates a respective communications scheme of the plurality of communications schemes for each frequency band of a plurality of frequency bands.

Aspect 13: The method of aspect 11, further comprising: determining the communications scheme based at least in part on the RRC message and a configuration of the DCI, wherein the RRC message indicates a respective communications scheme of the plurality of communications schemes for each type of the DCI of a plurality of types.

Aspect 14: The method of any of aspects 1 through 13, wherein receiving the control signaling comprises: receiving a MAC-CE that indicates a communications scheme of the plurality of communications schemes for transmission of the uplink data message, wherein transmitting the uplink data message is based at least in part on the communications scheme indicated via the MAC-CE.

Aspect 15: The method of aspect 14, further comprising: receiving an RRC message that indicates two SRS resource sets for the UE, wherein the MAC-CE disables a first SRS resource set of the two SRS resource sets, and wherein a presence of a switching indication field in the DCI is based at least in part on disabling the first SRS resource set.

Aspect 16: A method for wireless communication at a base station, comprising: transmitting, to a UE, control signaling that indicates a configuration of a plurality of communications schemes for uplink communications by the UE, the plurality of communications schemes comprising an FDM scheme, a TDM scheme, an SDM scheme, and an sTRP transmission scheme; transmitting, to the UE, DCI that schedules an uplink data message and indicates one or more SRS resource sets associated with the uplink data message, wherein a switching arrangement between the plurality of communications schemes is indicated for the uplink data message by one or more of: the control signaling, the DCI, or the one or more SRS resource sets; and receiving, from the UE, the uplink data message in accordance with the switching arrangement.

Aspect 17: The method of aspect 16, wherein transmitting the DCI comprises: transmitting a switching indication field, wherein a value of the switching indication field indicates the switching arrangement between the plurality of communications schemes for the uplink data message.

Aspect 18: The method of aspect 17, wherein the one or more SRS resource sets indicated via the DCI comprise a first SRS resource set and a second SRS resource set associated with the uplink data message; and the switching arrangement indicates an arrangement for transmitting a first portion or a first repetition of the uplink data message in accordance with a first set of parameters associated with the first SRS resource set and for transmitting a second portion or a second repetition of the uplink data message in accordance with a second set of parameters associated with the second SRS resource set.

Aspect 19: The method of any of aspects 17 through 18, wherein transmitting the control signaling comprises: transmitting an RRC message that indicates an uplink switching mode for the UE, the uplink switching mode associated with a switch between a subset of communications schemes of the plurality of communications schemes and selected from one of a first uplink switching mode and a second uplink switching mode, wherein: the first uplink switching mode is associated with a first subset of communications schemes comprising the SDM scheme and the sTRP transmission scheme; and the second uplink switching mode is associated with a second subset of communications schemes comprising the FDM scheme, the TDM scheme, and the sTRP transmission scheme.

Aspect 20: The method of aspect 19, wherein each value of the switching indication field indicates a respective communications scheme of the subset of communications schemes associated with the indicated uplink switching mode.

Aspect 21: The method of aspect 19, wherein: the uplink switching mode is the first uplink switching mode; a first set of values of the switching indication field indicates the sTRP transmission scheme; and a second set of values of the switching indication field indicates the SDM scheme.

Aspect 22: The method of aspect 19, wherein: the uplink switching mode is the second uplink switching mode; one or more first values of the switching indication field correspond to a communications scheme of the plurality of communications schemes that is associated with multiple TRPs; and a value of a TDRA field in the DCI indicates whether the communications scheme is the FDM scheme or the TDM scheme.

Aspect 23: The method of any of aspects 17 through 18, wherein each value of a plurality of values of the switching indication field indicates a respective switching arrangement of a plurality of switching arrangements and a respective communications scheme of the plurality of communications schemes for transmitting the uplink data message.

Aspect 24: The method of aspect 23, wherein the DCI further comprises a first resource indication field associated with a first plurality of values and a second resource indication field associated with a second plurality of values; a first subset of values of the first plurality of values is associated with resource indications for a first SRS resource set based at least in part on the switching indication field indicating the SDM scheme; and a second subset of values of the second plurality of values is associated with resource indications for a second SRS resource set based at least in part on the switching indication field indicating the SDM scheme.

Aspect 25: The method of aspect 23, wherein the DCI further comprises a first resource indication field associated with a first plurality of values and a second resource indication field associated with a second plurality of values; a first subset of values of the first plurality of values is associated with resource indications for a first SRS resource set based at least in part on the switching indication field indicating the SDM scheme; and a second subset of values of the first plurality of values is associated with resource indications for a second SRS resource set based at least in part on the switching indication field indicating the SDM scheme.

Aspect 26: The method of any of aspects 16 through 25, wherein transmitting the control signaling comprises: transmitting an RRC message that indicates two or more SRS resource sets for the UE, wherein the RRC message indicates a communications scheme of the plurality of communications schemes for transmission of the uplink data message, and wherein transmitting the uplink data message is based at least in part on the communications scheme indicated via the RRC message.

Aspect 27: The method of any of aspects 16 through 26, wherein transmitting the control signaling comprises: transmitting a MAC-CE that indicates a communications scheme of the plurality of communications schemes for transmission of the uplink data message, wherein transmitting the uplink data message is based at least in part on the communications scheme indicated via the MAC-CE.

Aspect 28: The method of aspect 27, further comprising: transmitting an RRC message that indicates two SRS resource sets for the UE, wherein the MAC-CE disables a first SRS resource set of the two reference signal resource sets, and wherein a presence of a switching indication field in the DCI is based at least in part on disabling the first SRS resource set.

Aspect 33: An apparatus for wireless communication at a base station, comprising at least one means for performing a method of any of aspects 16 through 28.