Mixed format techniques for orphaned symbols in uplink channel repetitions

Methods, systems, and devices for wireless communications are described. A user equipment (UE) receives, from a base station, an indication of a configuration for symbol repetition, the configuration including one or more parameters for transmitting a message on a physical uplink channel. The UE formats, based on a first format of the configuration, a first portion of a set of repetitions of the message scheduled for transmission before a slot boundary, and formats, based on a second format of the configuration, a second portion of the set of repetitions of the message scheduled for transmission after the slot boundary, the second portion being a single symbol. The UE transmits, to the base station, the first portion of the set of repetitions formatted according to the first format and the second portion of the set of repetitions according to the second format.

FIELD OF TECHNOLOGY

The following relates to wireless communications, including mixed format techniques for orphaned symbols in uplink channel repetitions.

BACKGROUND

SUMMARY

Some wireless systems may support communications between a UE and a base station. Communications between the UE and base station may involve a series of messages between the UE and the base station. In some cases, it may be desirable to improve the throughput associated with the communications.

The described techniques relate to improved methods, systems, devices, and apparatuses that support mixed format techniques for orphaned symbols (e.g., a single symbol after a transmission time interval boundary, such as a slot boundary) related to uplink channel repetitions. Generally, a user equipment (UE) may receive configuration information for mixed format techniques for orphaned symbols in uplink channel repetitions. The UE may format a first portion of a set of repetitions of a message based on a first format of the configuration and a second portion of the set of repetitions of the message based on a second format of the configuration, where the second portion of the set of repetitions is a single symbol (e.g., an orphan symbol, a symbol after a transmission time interval boundary, such as a slot boundary). The UE may then transmit to the base station the first portion according to the first format and the second portion according to the second format.

A method of wireless communication by a UE is described. The method may include receiving, from a base station, an indication of a configuration for symbol repetition, the configuration including one or more parameters for transmitting a message on a physical uplink channel, formatting, based on a first format indicated by the indication of the configuration, a first portion of a set of repetitions of the message scheduled for transmission before a slot boundary, and based on a second format indicated by the indication of the configuration, a second portion of the set of repetitions of the message scheduled for transmission after the slot boundary, where the second portion of the set of repetitions is a single symbol, and transmitting, to the base station, the first portion of the set of repetitions formatted according to the first format and the second portion of the set of repetitions according to the second format.

An apparatus for wireless communication by 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, from a base station, an indication of a configuration for symbol repetition, the configuration including one or more parameters for transmitting a message on a physical uplink channel, format, based on a first format indicated by the indication of the configuration, a first portion of a set of repetitions of the message scheduled for transmission before a slot boundary, and based on a second format indicated by the indication of the configuration, a second portion of the set of repetitions of the message scheduled for transmission after the slot boundary, where the second portion of the set of repetitions is a single symbol, and transmit, to the base station, the first portion of the set of repetitions formatted according to the first format and the second portion of the set of repetitions according to the second format.

Another apparatus for wireless communication by a UE is described. The apparatus may include means for receiving, from a base station, an indication of a configuration for symbol repetition, the configuration including one or more parameters for transmitting a message on a physical uplink channel, formatting, based on a first format indicated by the indication of the configuration, a first portion of a set of repetitions of the message scheduled for transmission before a slot boundary, and based on a second format indicated by the indication of the configuration, a second portion of the set of repetitions of the message scheduled for transmission after the slot boundary, where the second portion of the set of repetitions is a single symbol, and transmitting, to the base station, the first portion of the set of repetitions formatted according to the first format and the second portion of the set of repetitions according to the second format.

A non-transitory computer-readable medium storing code for wireless communication by a UE is described. The code may include instructions executable by a processor to receive, from a base station, an indication of a configuration for symbol repetition, the configuration including one or more parameters for transmitting a message on a physical uplink channel, format, based on a first format indicated by the indication of the configuration, a first portion of a set of repetitions of the message scheduled for transmission before a slot boundary, and based on a second format indicated by the indication of the configuration, a second portion of the set of repetitions of the message scheduled for transmission after the slot boundary, where the second portion of the set of repetitions is a single symbol, and transmit, to the base station, the first portion of the set of repetitions formatted according to the first format and the second portion of the set of repetitions according to the second format.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for selecting the second format based on a number of bits supported by the first format, where formatting the second portion of the set of repetitions may be based on selecting the second format. In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the second format may support sequence-based transmissions.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for selecting the second format based on the number of bits supported by the second format matching the number of bits supported by the first format, where formatting the second portion of the set of repetitions may be based on selecting the second format.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for selecting the second format based on the second format supporting a demodulation reference signal and data being encoded or multiplexed within a single symbol.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, selecting the second format may include operations, features, means, or instructions for selecting a modified physical uplink control channel format, where a number of bits supported by the modified physical uplink control channel format matches the number of bits supported by the first format.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the number of bits supported by the first format and the second format may be 2 bits or less.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the number of bits supported by the first format and the second format may be greater than 2 bits.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for selecting the second format based on a number of resource blocks supported by the first format.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for selecting the second format based on a number of resource blocks supported by the second format matching the number of resource blocks supported by the first format.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, selecting the second format may include operations, features, means, or instructions for selecting a modified physical uplink control channel format, where a number of resource blocks supported by the modified physical uplink control channel format matches the number of resource blocks supported by the first format, and where a number of bits supported by the modified physical uplink control channel format matches the number of bits supported by the first format.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, receiving the indication of the configuration may include operations, features, means, or instructions for receiving the indication of the configuration in a radio resource control message, or a media access control-control element message, or a downlink control information message, or any combination thereof.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first portion of the message includes two or more symbols.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the physical uplink channel includes a physical uplink control channel.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first format includes a physical uplink control channel format 1 and the second format includes a physical uplink control channel format 0.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first format includes a physical uplink control channel format 1 and the second format includes a modified physical uplink control channel format 2.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first format includes a physical uplink control channel format 3 and the second format includes a modified physical uplink control channel format 0.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first format includes a physical uplink control channel format 3 and the second format includes a physical uplink control channel format 2.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first format includes a physical uplink control channel format 4 and the second format includes a modified physical uplink control channel format 0.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first format includes a physical uplink control channel format 4 and the second format includes a physical uplink control channel format 2.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the one or more parameters include an indication of a number of repetitions, an indication of a length of the repetition, an indication of a starting symbol for the repetition, or any combination thereof.

A method of wireless communication by a base station is described. The method may include transmitting, to a UE, an indication of a configuration for symbol repetition, the configuration including one or more parameters for transmitting a message on a physical uplink channel, receiving, from the UE, a first portion of a set of repetitions of the message transmitted before a slot boundary and formatted according to a first format indicated by the indication of the configuration, and a second portion of the set of repetitions of the message transmitted after the slot boundary and formatted according to a second format indicated by the indication of the configuration, the second portion of the set of repetitions being a single symbol, and processing the first portion of the set of repetitions of the message according to the first format and the second portion of the set of repetitions of the message according to the second format.

An apparatus for wireless communication by 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, an indication of a configuration for symbol repetition, the configuration including one or more parameters for transmitting a message on a physical uplink channel, receive, from the UE, a first portion of a set of repetitions of the message transmitted before a slot boundary and formatted according to a first format indicated by the indication of the configuration, and a second portion of the set of repetitions of the message transmitted after the slot boundary and formatted according to a second format indicated by the indication of the configuration, the second portion of the set of repetitions being a single symbol, and process the first portion of the set of repetitions of the message according to the first format and the second portion of the set of repetitions of the message according to the second format.

Another apparatus for wireless communication by a base station is described. The apparatus may include means for transmitting, to a UE, an indication of a configuration for symbol repetition, the configuration including one or more parameters for transmitting a message on a physical uplink channel, receiving, from the UE, a first portion of a set of repetitions of the message transmitted before a slot boundary and formatted according to a first format indicated by the indication of the configuration, and a second portion of the set of repetitions of the message transmitted after the slot boundary and formatted according to a second format indicated by the indication of the configuration, the second portion of the set of repetitions being a single symbol, and processing the first portion of the set of repetitions of the message according to the first format and the second portion of the set of repetitions of the message according to the second format.

A non-transitory computer-readable medium storing code for wireless communication by a base station is described. The code may include instructions executable by a processor to transmit, to a UE, an indication of a configuration for symbol repetition, the configuration including one or more parameters for transmitting a message on a physical uplink channel, receive, from the UE, a first portion of a set of repetitions of the message transmitted before a slot boundary and formatted according to a first format indicated by the indication of the configuration, and a second portion of the set of repetitions of the message transmitted after the slot boundary and formatted according to a second format indicated by the indication of the configuration, the second portion of the set of repetitions being a single symbol, and process the first portion of the set of repetitions of the message according to the first format and the second portion of the set of repetitions of the message according to the second format.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for indicating, via the indication of the configuration, a selection of the second format for the UE to use based on a number of bits supported by the first format. In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the second format may support sequence-based transmissions.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for indicating, via the indication of the configuration, a selection of the second format for the UE to use based on the second format supporting a demodulation reference signal and data being encoded or multiplexed within a single symbol.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for indicating, via the indication of the configuration, a selection of the second format for the UE to use based on a number of bits supported by the second format matching the number of bits supported by the first format.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for indicating, via the indication of the configuration, a modified physical uplink control channel format, where a number of bits supported by the modified physical uplink control channel format matches the number of bits supported by the first format.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the number of bits supported by the first format and the second format may be 2 bits or less.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the number of bits supported by the first format and the second format may be greater than 2 bits.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for indicating, via the indication of the configuration, a selection of the second format for the UE to use based on a number of resource blocks supported by the first format.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for indicating, via the indication of the configuration, a selection of the second format for the UE to use based on a number of resource blocks supported by the second format matching the number of resource blocks supported by the first format.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for indicating, via the indication of the configuration, a modified physical uplink control channel format, where a number of resource blocks supported by the modified physical uplink control channel format matches the number of resource blocks supported by the first format, and where a number of bits supported by the modified physical uplink control channel format matches the number of bits supported by the first format.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, transmitting the indication of the configuration may include operations, features, means, or instructions for transmitting the configuration in a radio resource control message, or a media access control-control element message, or a downlink control information message, or any combination thereof.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first portion of the message includes two or more symbols.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the physical uplink channel includes a physical uplink control channel.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first format includes a physical uplink control channel format 1 and the second format includes a physical uplink control channel format 0.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first format includes a physical uplink control channel format 1 and the second format includes a modified physical uplink control channel format 2.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first format includes a physical uplink control channel format 3 and the second format includes a modified physical uplink control channel format 0.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first format includes a physical uplink control channel format 3 and the second format includes a physical uplink control channel format 2.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first format includes a physical uplink control channel format 4 and the second format includes a modified physical uplink control channel format 0.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first format includes a physical uplink control channel format 4 and the second format includes a physical uplink control channel format 2.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the one or more parameters include an indication of a number of repetitions, an indication of a length of the repetition, an indication of a starting symbol for the repetition, or any combination thereof.

DETAILED DESCRIPTION

Some wireless communications systems may support uplink channel repetitions, such as physical uplink control channel (PUCCH) repetitions (e.g., PUCCH repetition type A, PUCCH repetition type B). In such cases, a base station may configure a user equipment (UE) to transmit repetitions (e.g., X symbols) of a message on a physical uplink channel (e.g., PUSCH or PUCCH). In such examples, the UE may configure one or more repetitions in a message.

In some cases, the repetitions for the message may span across a transmission interval time boundary, such as a slot-boundary, breaking the repetitions of the message into two or more segments (e.g., subsets) of the repetitions (e.g., two or more separate actual repetitions). In some cases, one or more downlink (DL) symbols or invalid symbols may occur among the repetitions of a message, which also may break the repetitions of the message into two or more segments of the repetitions. Thus, a first portion of the repetitions may be scheduled for transmission before a transmission time interval boundary, such as a slot boundary (or DL symbol, or an invalid symbol), for example, and a second portion of the repetitions may be scheduled for transmission after the transmission time interval boundary, such as the slot boundary (or a DL symbol, or an invalid symbol).

In some cases, the break in the repetitions may result in a single symbol (e.g., one orphaned symbol) remaining after the break (e.g., after the slot boundary). In some examples, repetitions of a message may include X symbols (e.g., a symbol repeated X times). In some cases, one of those X symbols of the repetitions of the message may be orphaned after the break. When the repetitions of the message include 10 repetitions, for example, and the slot boundary occurs directly after 9 repetitions, then the first portion of the repetitions would include the first 9 repetitions and the second portion would include the 1 remaining repetition (e.g., 1 remaining symbol). When the repetitions of the message include 10 repetitions, for example, and a DL symbol or invalid symbol may occur after 8 repetitions, then the first portion of the repetitions would include the first 8 repetitions, followed by a DL symbol or invalid symbol, which may then be followed by the second portion that would include the 1 remaining repetition (e.g., 1 remaining orphaned symbol).

In some cases, the same format that is used on the first portion may be used on the second portion. However, the format used for the set of repetitions of the message may include a constraint (e.g., a parameter limitation or condition to be used for one or more operations) to use more than 1 symbol (e.g., constraint of using 4-14 symbols for PUCCH Formats 1, 3, and 4, constraint of using multiple symbols). Thus, the first portion of the set of repetitions may be constrained to use more than 1 symbol according to a format of the first portion, and because the format used on the first portion may otherwise apply to the second portion, the second portion may also be constrained to use more than 1 symbol independent of the number of symbols in the first portion or the second portion. But when the second portion includes a single repetition (e.g., a single symbol) after the break, the UE may be unable to transmit data/control information in that single remaining symbol due to a mismatch between a constraint of the format used on the first portion (e.g., to use more than 1 symbol) and the number of symbols available in the second portion (e.g., 1 symbol). Accordingly, the UE may drop or skip the orphaned symbol because of the UE being configured to use the format of the first portion on the second portion, but the format includes a constraint to use more than 1 symbol and the second portion of the set of repetitions includes 1 symbol.

Using a second format for the second portion of a set of repetitions may avoid the UE dropping or skipping the orphaned symbol. In some examples, when a break in a set of repetitions of a message occurs between the second to last symbol and the last symbol of the set of repetitions, a first format may be used on the first portion of the set of repetitions and a second format, i.e., different than the first format, may be used on the last symbol of the second portion of the set of repetitions. In some examples, the second format may support or be used for sequence-based transmissions (e.g., without a demodulation reference signal (DMRS) or transmissions without a DMRS-based structure). In some cases, the first format may support or be used for DMRS-based transmissions, and the second format may not support DMRS-based transmissions.

In some cases, an unmodified version of the second format may be used on the last symbol. In some cases, an unmodified version of the second format may be used when the number of bits that are used in the first format is within a range of the number of bits that may be used in the second format (e.g., according to a constraint of the second format). In some cases, an unmodified version of the second format may be used when the number of resource blocks that are used in the first format is within a range of or equal to the number of resource blocks that may be used in the second format (e.g., according to a constraint of the second format).

In some cases, a modified version of the second format may be used on the last symbol. The modified version of the second format may include a modified number of bits that may be used in the second format, or a modified number of resource blocks that may be used in the second format, or both. In some cases, according to the modified or unmodified second format, the UE sets the number of bits that are used on the second portion (e.g., the orphaned symbol) to match the number of bits that are used on the first portion according to the first format. In some cases, according to the modified or unmodified second format, the UE sets the number of resource blocks that are used on the second portion (e.g., the orphaned symbol) to match the number of resource blocks that are used on the first portion according to the first format.

In some cases, a base station may signal a configuration for repetition to a UE. In some cases, the configuration may indicate a process for orphaned symbols. In some cases, the configuration may indicate one or more formats to use for various symbols, including, but not limited to, orphaned symbols (e.g., a second format for the orphaned symbol, a second format to use on the second portion based on the first format used on the first format). In some cases, the configuration may indicate to drop or skip an orphaned symbol.

Thus, the present techniques improve resource usage efficiency when a break in the repetitions of a message occurs between the second to last symbol and the last symbol of the repetitions of the message, leaving a single orphaned symbol in a second portion of the repetitions of the message. When a break in the repetitions of a message occurs between the second to last symbol and the last symbol of the repetitions of the message, the first format may be used on the first portion of the repetitions and a second format may be used on the last symbol of the second portion of the repetitions.

Particular aspects of the subject matter described herein may be implemented to realize one or more advantages. The described techniques may support improvements in system efficiency such that a device may improve resource usage by avoiding symbols (e.g., orphaned symbols) being discarded or otherwise being sub-optimally used. Additionally, described techniques may result in avoiding multiple retransmissions and failed transmissions, decreases in system latency, improving the reliability of a decoding procedure for uplink transmissions at a base station, and improving user experience.

Aspects of the disclosure are initially described in the context of wireless communications systems. Aspects of the disclosure are further illustrated by and described with reference to physical uplink channel 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 mixed format techniques for orphaned symbols in uplink channel repetitions.

Aspects of the disclosure are initially described in the context of wireless communications systems. Aspects of the disclosure are further illustrated by and described with reference to physical uplink channel configurations and process flows that relate to mixed format techniques for orphaned symbols in uplink channel repetitions. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to mixed format techniques for orphaned symbols in uplink channel repetitions.

In some examples, a UE115may receive (e.g., from a base station105) an indication of a configuration for symbol repetition, where the configuration includes one or more parameters for transmitting a message on a physical uplink channel. The configuration may indicate a configuration for mixed format techniques for orphaned symbols in uplink channel repetitions. In some cases, a first portion of a set of repetitions of the message may be scheduled for transmission before a slot boundary and a second portion of the set of repetitions of the message may be scheduled for transmission after the slot boundary. The UE115may format the first portion of the set of repetitions of the message based on a first format indicated by the indication of the configuration and the second portion of the set of repetitions of the message based on a second format indicated by the configuration. In some cases, the second portion of the set of repetitions may include a single symbol. In some cases, the UE115may transmit (e.g., to a base station105) the first portion of the set of repetitions formatted according to the first format and the second portion of the set of repetitions according to the second format.

FIG.2illustrates an example of a physical uplink channel configuration200that supports mixed format techniques for orphaned symbols in uplink channel repetitions in accordance with aspects of the present disclosure. In some examples, physical uplink channel configuration200may be implemented by or may implement aspects of wireless communications system100. For instance, a UE115may communicate with a base station105according to physical uplink channel configurations200, and the UE115and the base station105may be examples of corresponding devices described with reference toFIG.1.

Physical uplink channel configuration200may support physical uplink channel repetition type A (e.g., PUSCH repetitions type A or PUCCH repetitions type A). Physical uplink channel configuration200may support physical uplink channel repetition type B (e.g., PUSCH repetitions type B or PUCCH repetitions type B).

In some examples, a wireless communications system may support a physical uplink channel repetition configuration. Such configurations may support both dynamic grants and configured grants. In some examples, a base station105may transmit an uplink grant (e.g., via downlink control information (DCI)) triggering an uplink transmission. Base station105may also dynamically indicate configuration information for a number of repetitions of an uplink message. For instance, the DCI may include an indication of a starting symbol (S) for a first repetition (e.g., in each slot), a length (L) of each repetition (e.g., a number of symbols), a number of repetitions (K), other parameters, or any combination thereof. In some examples, a DCI including a scheduling grant may also include an indication (e.g., an SLIV field) indicating such configuration information.

In some examples, one or more repetitions220may be scheduled or configured within slots210or across slot boundaries215. Physical uplink channel repetition type B may also support dynamic indications of a number of repetitions, inter-nominal repetition frequency hopping, uplink/downlink symbol interaction, configuration indications and configuration information, or the like. In some examples of physical uplink channel repetitions, a base station105may configure a UE115to transmit one or more repetitions of an uplink message (e.g., a data message on a PUSCH or a control message on a PUCCH). Base station105may configure (e.g., via DCI205-b) UE115to transmit one or more repetitions220. For instance, base station105may transmit DCI205-bduring or prior to slot210-cto trigger an uplink message. Configuration information (e.g., included in DCI205-b) may indicate a starting symbol (e.g., S=10) for a first repetition220of the uplink message in a first slot210, a length of each repetition (e.g., L=4), a number of repetitions (e.g., K=2), or the like. In such examples, UE115may transmit K=2 nominal repetitions, each having length L=4, back-to-back (e.g., consecutively) starting from symbol S=10. Thus, UE115may transmit first repetition220-cof the uplink message during the last four symbols of slot210-c(e.g., after the first ten symbols of slot210-cbased on S=10), and may then immediately transmit the second repetition220-dof the uplink message during the first four symbols of next slot210-d(e.g., the next four symbols following repetition220-c). In some examples, UE115may transmit the uplink message on invalid symbols in slot210-daccording to the configuration information. The same or similar procedures may be performed for transmitting control messages on a PUCCH.

In some examples, one or more repetitions220may cross a slot boundary215. In some cases, a portion of the divided repetition220may include a format that includes a constraint that a set of repetitions includes at least two symbols. In some cases, a divided repetition (e.g., divided repetition220-d) may include a single symbol. Accordingly, a format may be adapted for the divided repetition with a single symbol. In some cases, a UE115may format different portions of a divided repetition220using different types of formatting as described in the present disclosure.

FIG.3illustrates an example of examples of physical uplink channel configurations300,301, and302, respectively, that support mixed format techniques for orphaned symbols in uplink channel repetitions in accordance with aspects of the present disclosure. In some examples, physical uplink channel configuration300, physical uplink channel configuration301, and physical uplink channel configuration302may implement or may be implemented by aspects of wireless communications system100. For instance, a UE115may communicate with a base station105according to physical uplink channel configurations300,301, and302, and the UE115and the base station105may be examples of corresponding devices described with reference toFIG.1. A base station may transmit configuration information to UE115(e.g., via a DCI205, as described with reference toFIG.2).

As illustrated with reference toFIG.3A, UE115may identify, based on the configuration information, one or more repetitions320in slots310. In some examples, repetitions320may be referred to as nominal repetitions. Nominal repetitions may be located in a virtual domain, and may ignore slot boundaries, downlink TTI interruptions, or the like. For instance, where base station105configures an uplink message (e.g., a control message on a PUCCH or a data message on a PUSCH) with two consecutive repetitions of four symbols each starting after four symbols of a first slot310, UE115may identify two nominal repetitions (e.g., repetition320-aand repetition320-bduring slot310-a).

However, in some examples, cross-slot repetitions may be supported (e.g., in physical uplink channel repetition type B for PUSCH or PUCCH). For instance, as illustrated with reference toFIG.3B, base station105may configure four consecutive nominal repetitions having a length of four symbols (e.g., repetition320-c, repetition320-d, repetition320-e, and repetition320-f) to start after four symbols of slot310-c. However, repetition320-emay cross slot boundary315-bbetween slot310-cand slot310-d. UE115may perform uplink transmissions in slot310-caccording to a first set of transmission parameters (e.g., transmit power, beam selection, modulation and coding scheme (MCS), TCI state, or the like), and may perform uplink transmissions in slot310-daccording to a second set of transmission parameters. If a first portion325of a repetition320is located on one side of a TTI boundary, such as a slot boundary315, and another portion325of the repetition320is on the other side of the TTI boundary, such as the slot boundary315, then the different portions325of the repetition320may be transmitted using different transmission parameters.

ForFIG.3B, although base station105configures four nominal repetitions, UE115may transmit five actual repetitions. An actual repetition may be defined as a portion325of a repetition320. For instance, a nominal repetition may be broken into multiple actual repetitions due to slot boundaries, downlink TTI interruption, or the like. Thus, although base station105schedules four nominal repetitions (e.g., repetition320-c, repetition320-d, repetition320-e, and repetition320-f), UE115may transmit five actual repetitions (e.g., repetition320-c, repetition320-d, first portion325-aof repetition320-e, second portion325-bof repetition320-e, and repetition320-f).

Similarly, as illustrated with reference toFIG.3C, a single repetition320may cross a slot boundary315-c. In some cases, base station105may configure a one or more nominal repetition where S+L>14. For instance, base station105may configure UE115to transmit one repetition320-ghaving a length of fourteen symbols starting after the first four symbols of slot310-e(e.g., S=4). In such examples, repetition320-gmay cross slot boundary315-c. Thus, although base station105configures a single nominal repetition (e.g., repetition320-g), UE115may transmit two actual transmissions (e.g., first portion325-cof repetition320-gand second portion325-dof repetition320-g). UE115may transmit first portion325-cusing a first set of transmission parameters for slot310-e, and may transmit the second portion325-dusing a second set of transmission parameters for slot310-f.

In some cases, repetition320-emay use a format with a constraint that the repetition320-eincludes at least two symbols. As shown, the first portion325-aof repetition320-eincludes two symbols and the second portion325-bof repetition320-eincludes two symbols. Accordingly, the first portion325-aof repetition320-eand the second portion325-bof repetition320-emay be formatted with a format that includes a two-symbol per repetition constraint (e.g., both formatted with the same format).

However, in some cases, a divided repetition (e.g., the first portion325-aof repetition320-eor the second portion325-bof repetition320-eforFIG.3B, the first portion325-cof repetition320-gor the second portion325-dof repetition320-gforFIG.3C) may include a single symbol. Accordingly, a format may be adapted for the divided repetition that includes a single symbol in a portion. In some cases, a UE115may format different portions of a divided repetition220using different types of formatting. For example, a UE115may format the first portion325-aof repetition320-eusing a first format and may format the second portion325-bof repetition320-eusing a second format different than the first format.

FIG.4illustrates an example of a physical uplink channel configuration400that supports mixed format techniques for orphaned symbols in uplink channel repetitions in accordance with aspects of the present disclosure. In some examples, physical uplink channel configuration400may be implemented by or may implement aspects of wireless communications system100. For instance, a UE115may communicate with a base station105according to physical uplink channel configuration400, and the UE115and the base station105may be examples of corresponding devices described with reference toFIG.1.

In some examples (e.g., in wireless communications systems that support PUSCH repetitions type B or PUCCH repetitions type B), wireless communications systems may support segmentation of repetitions. In such examples, a nominal repetition may be segmented around slot boundary415, semi-static downlink symbols, or other parameters (e.g., an invalidsymbolpattern indication). For instance, base station105may transmit a DCI405, which may include configuration information for an uplink message (e.g., a data message on a PUSCH or a control message on a PUCCH). The configuration information may include a grant for two repetitions (e.g., K=2) having lengths of five symbols (e.g., L=5) starting after the first nine symbols of slot410-a(e.g., S=9). In some examples, an indication (e.g., in DCI405or another downlink message) such as an invalidsymbolpattern indicator may indicate useable symbols for a physical uplink channel (e.g., a PUSCH). For instance, the indication may indicate that one or more invalid symbols (e.g., the third and fourth invalid symbols of slot410-b) are useable for a repetition420. In such examples, UE115may identify two nominal repetitions (e.g., repetition420-aand repetition420-b), and may transmit two actual repetitions (e.g., portion425of repetition420-b). In some examples, portion425of repetition420-bmay include some symbols, but not all symbols of nominal repetition420-b.

Thus, as described with reference toFIGS.3B,3C, and5, in some examples, due to a nominal repetition that crosses a slot boundary, or an intervening downlink symbol, or configuration information, or any combination thereof, UE115may transmit an actual transmission (e.g., portion of a nominal transmission), and may not be located in a same slot as another portion of the repetitions or of another repetition.

In some examples, the uplink message may be a control message on a PUCCH. In such examples, PUCCH repetition configurations may support multiple PUCCH repetitions within a single slot310, unequal lengths across repetitions, slot boundaries breaking nominal repetitions in actual repetitions (e.g., two actual repetitions for one nominal repetition divided into two portions), DL OFDM symbols breaking nominal repetitions into multiple actual repetitions, or the like. Such PUCCH repetition configurations may be referred to as PUCCH repetition type B. Thus, data messages on a PUSCH or control messages on a PUCCH may experience the same issues resulting from actual repetitions (e.g., after a slot boundary, an intervening downlink symbol, or both).

In some cases, repetition420-amay be formatted according to a format that includes a constraint that the repetition420-aincludes at least two symbols. As shown, the repetition420-aand repetition420-b(e.g., portion425of repetition420-b) each includes at least two symbols. Accordingly, the repetition420-aand repetition420-b(e.g., portion425of repetition420-b) may be formatted with a format that includes a two-symbol per repetition constraint (e.g., both repetitions formatted with the same format). However, in some cases, a divided repetition (e.g., portion425of repetition420-b) may include a single symbol. Accordingly, a format may be adapted for the divided repetition that includes a single symbol. When portion425of repetition420-bincludes a single symbol, a UE115may format repetition420-ausing a first format and may format portion425of repetition420-busing a second format different than the first format.

FIG.5illustrates an example of a physical uplink channel configuration500that supports mixed format techniques for orphaned symbols in uplink channel repetitions in accordance with aspects of the present disclosure. In some examples, physical uplink channel configuration500may be implemented by or may implement aspects of wireless communications system100. For instance, a UE115may communicate with a base station105according to physical uplink channel configuration500, and the UE115and the base station105may be examples of corresponding devices described with reference toFIG.1.

In some examples, the base station105may provide the UE115with configuration information (e.g., indicate a configuration) that includes one or more parameters for transmitting a message on a physical uplink channel. In some cases, the one or more parameters may include an indication of a number of repetitions, an indication of a length of the repetition, an indication of a starting symbol for the repetition, or any combination thereof. In some examples, the UE115receiving the configuration may include the UE115receiving the configuration in a radio resource control message, or a media access control-control element message, or a downlink control information message, or any combination thereof. In some cases, the configuration may indicate to drop or skip an orphaned symbol. In some cases, the configuration may indicate one or more conditions (e.g., a channel condition, a signal power measurement, etc.) when the UE115may drop an orphaned symbol or skip transmitting an orphaned symbol.

In some cases, the configuration information (e.g., at least partially included in DCI505) may indicate a starting symbol (e.g., S=4, after the fourth symbol) for repetition520of the uplink message in a first slot510-a, a length of the repetition (e.g., L=11), a number of repetitions (e.g., K=1), or the like. In such examples, UE115may transmit K=1 nominal repetitions having length L=11 starting from symbol S=4. Thus, UE115may identify one nominal repetition (e.g., repetition520). However, in some examples, a repetition520may be divided by a TTI boundary (e.g., slot boundary515), a downlink symbol, an invalid symbol, or the like. For instance, repetition520may cross slot boundary515between slot510-aand slot510-b. Thus, the UE115may divide the nominal repetition (e.g., repetition520) into two actual transmissions (e.g., portion525-aof repetition520and portion525-bof repetition520). In some cases, the portion525-aof the message may include two or more symbols. In some cases, the physical uplink channel may include a physical uplink control channel.

In some examples, the UE115may format portion525-aof repetition520based on a first format indicated by the configuration, and format portion525-bof repetition520based on a second format indicated by the configuration. In some cases, the configuration may indicate a first format to use on a first portion of a set of repetitions (e.g., portion525-a) and a second format to use on a second portion when the second portion includes a single symbol (e.g., portion525-b). In some cases, a second format (e.g., a second format different than the first format, a modified second format) may be used on the second portion (e.g., portion525-b) when the second portion includes one symbol or two symbols.

In some examples, the second format (e.g., format 0) may support or be used for sequence-based transmissions (e.g., without a demodulation reference signal (DMRS) or transmissions without a DMRS-based structure). In some cases, the first format may support or be used for DMRS-based transmissions, and the second format may not support DMRS-based transmissions (e.g., format 0). In some cases, the first format may rely on the existence of a DMRS or knowledge of the associated channel (e.g., channel estimation) to enable a base station to decode a transmission formatted according to the first format, while the second format may not rely on the existence of a DMRS or knowledge of the channel (e.g., channel estimation) to enable the base station to decode a transmission formatted according to the second format. In the second format, DMRS overhead may be reduced (e.g., eliminated completely) since channel estimation may not be used for non-coherent detection used in transmissions with sequence-based structures. In some cases, when the second format is used independent resources in the code domain may be assigned for HARQ-ACK feedback.

In some examples, the second format (e.g., format 2) may support or be used for DMRS-based transmissions or transmissions with a DMRS-based structure. In some examples, the second format may be selected based on the second format supporting a demodulation reference signal and data being encoded or multiplexed within the same symbol. Accordingly, in some cases the second format may be selected based on the second format supporting DMRS-based transmissions for orphaned symbols (e.g., when the DMRS and data are encoded or multiplexed in the same orphaned symbol).

In some cases, the configuration may indicate the format to use for portion525-bbased on portion525-bincluding a single symbol and based on the format used for portion525-a. In some cases, the configuration may include a list of formats to use based on when portion525-bincludes a single symbol and based on the format used for portion525-a.

In some examples, the UE115may transmit, to the base station105, the portion525-aformatted by UE115according to the first format and the portion525-bformatted by UE115according to the second format. In some examples, the UE115may select the second format based on a number of bits supported by the first format (e.g., a constraint on the number of bits used in a repetition). In some cases, formatting the portion525-bmay be based on the UE115selecting the second format (e.g., selecting the second format based on the configuration).

In some examples, the UE115may select the second format based on a number of bits supported by the second format matching the number of bits supported by the first format, where formatting the portion525-bis based on UE115selecting the second format. In some examples, the UE115selecting the second format may include the UE115selecting a modified physical uplink control channel format, where a number of bits supported by the modified physical uplink control channel format matches the number of bits supported by the first format.

In some cases, the number of bits supported by the first format and the second format is 2 bits or less (e.g., each repetition of a given format includes 2 bits or less). In some cases, the number of bits supported by the first format and the second format is greater than 2 bits (e.g., each repetition of a given format includes 2 or more bits). In some cases, the configuration may indicate a maximum number of bits that may be used in a repetition of a given format (e.g., the first format includes 2 or more bits and up to 20 bits, or up to 30 bits, or up to 100 bits, up to 8,064 bits).

In some examples, the UE115may select the second format based on a number of resource blocks supported by the first format. In some examples, the UE115may select the second format based on a number of resource blocks supported by the second format matching the number of resource blocks supported by the first format (e.g., a maximum of 1 resource block supported by the first format and the second format, from 1 to 16 resource blocks supported by the first format and the second format). In some examples, the UE115selecting the second format may include the UE115selecting a modified physical uplink control channel format, where a number of resource blocks supported by the modified physical uplink control channel format matches the number of resource blocks supported by the first format and a number of bits supported by the modified physical uplink control channel format matches the number of bits supported by the first format.

In some cases, a physical uplink control channel format may include one or more constraints as shown in Table 1. As shown, a physical uplink control channel format 0 may include a constraint of 2 or less bits and 1 resource block. In some examples, a physical uplink control channel format 1 may include a constraint of 2 or less bits and 1 resource block (e.g., 1 physical resource block). For instance, a repetition formatted according to format 1 may include 2 or less bits and 1 resource block in the repetition. As shown in Table 1, a physical uplink control channel format 2 may include a constraint of greater than 2 bits and 1-16 resource blocks. As shown in Table 1, a physical uplink control channel format 3 may include a constraint of greater than 2 bits and 1-6 resource blocks, or 8-10 resource blocks, or 12 resource blocks, or 15 resource blocks, or 16 resource blocks. As shown in Table 1, a physical uplink control channel format 4 may include a constraint of greater than 2 bits and 1 resource block.

In some examples, when portion525-ais formatted according to physical uplink control channel format 1 of Table 1, based on the configuration the UE115may select physical uplink control channel format 0 of Table 1 to format portion525-b. Because format 1 and format 0 both include a constraint of 2 or less bits and 1 resource block, the UE115may select a non-modified version of format 0 (e.g., format 0 of Table 1) to format portion525-b.

In some examples, when portion525-ais formatted according to physical uplink control channel format 1 of Table 1, the UE115may select, based on the configuration, physical uplink control channel modified format 2a of Table 1 to format portion525-b. Because format 1 is constrained to less than or equal to 2 bits and 1 resource block, but format 2 is constrained to greater than 2 bits and 1-16 resource blocks, the UE115may select a modified version of format 2 that is constrained to less than or equal to 2 bits and 1 resource block (e.g., format 2a of Table 1) to format portion525-b.

In some examples, when portion525-ais formatted according to physical uplink control channel format 3 of Table 1, the UE115may select, based on the configuration, physical uplink control channel modified format 0a of Table 1 to format portion525-b. Because format 3 is constrained to greater than 2 bits and 1-6, 8-10, 12, 15, 16 resource blocks, but format 0 is constrained to less than or equal to 2 bits and 1 resource block, the UE115may select a modified version of format 0 that is constrained to greater than 2 bits and 1-6, 8-10, 12, 15, 16 resource blocks (e.g., format 0a of Table 1) to format portion525-b.

In some examples, when portion525-ais formatted according to physical uplink control channel format 3 of Table 1, based on the configuration the UE115may select physical uplink control channel format 2 of Table 1 to format portion525-b. Because format 3 and format 2 both include a constraint of greater than 2 bits, but format 3 is constrained to 1-6, 8-10, 12, 15, 16 resource blocks while format 2 allows 1-16 resource blocks, the UE115or a base station105may constrain format 2 to 1-6, 8-10, 12, 15, 16 resource blocks to format portion525-b. In some cases, the configuration may indicate to the UE to match the number of resource blocks in the second format to the number of resource blocks allowed in the first format.

In some examples, when portion525-ais formatted according to physical uplink control channel format 4 of Table 1, based on the configuration the UE115may select physical uplink control channel modified format Ob of Table 1 to format portion525-b. Because format 4 and format 0 both include a constraint of 1 resource block, but format 0 is constrained to less than or equal to 2 bits while format 4 is constrained to greater than 2 bits, the UE115may select a modified version of format 0 that is constrained to greater than 2 bits (e.g., format Ob of Table 1) to format portion525-b.

In some examples, when portion525-ais formatted according to physical uplink control channel format 4 of Table 1, based on the configuration the UE115may select physical uplink control channel format 2 of Table 1 to format portion525-b. Because format 4 and format 2 both include a constraint of greater than 2 bits, but format 4 is constrained to 1 resource block while format 2 allows 1-16 resource blocks, the UE115or a base station105may constrain format 2 to 1 resource block to format portion525-b. In some cases, the configuration may indicate to the UE to match the number of resource blocks in the second format to the number of resource blocks allowed in the first format.

FIG.6illustrates an example of a process flow600that supports mixed format techniques for orphaned symbols in uplink channel repetitions in accordance with aspects of the present disclosure. In some examples, process flow600may be implemented by or may implement aspects of wireless communications system100. For instance, UE615and base station605may be examples of corresponding devices described with reference toFIG.1, among others.

At605, base station105-amay transmit to UE115-aan indication of a configuration for symbol repetition. In some cases, the configuration may include one or more parameters for transmitting a message on a physical uplink channel. In some cases, the configuration may indicate one or multiple formats to use for orphaned symbols in uplink channel repetitions. In some cases, the base station105-amay generate the configuration and then transmit the generated configuration to the UE115-a.

At610, UE115-amay receive the configuration from base station105-aand implement the configuration. In some cases, the UE115-amay use the configuration to configure one or more symbol repetition transmissions (e.g., to base station105-a). In some cases, the UE115-amay use the one or more parameters of the implemented configuration to transmit the message on the physical uplink channel.

At615, UE115-amay select a second format for a symbol repetition transmission (e.g., a set of repetitions of the message transmission). In some cases, UE115-amay determine that the symbol repetition transmission is divided by a repetition partition (e.g., a slot boundary, a TTI boundary, a downlink symbol, an invalid symbol), or the like, based on the scheduling of the symbol repetition transmission. In some cases, UE115-amay select a first format for a first portion of the symbol repetition transmission and select the second format for a second portion of the symbol repetition transmission. In some cases, UE115-amay select the second format based on an aspect of a first format. In some cases, the aspect of the first format may include a number of bits supported by the first format or a number of resource blocks supported by the first format, or both. In some cases, UE115-amay select the second format based on the second portion of the symbol repetition transmission having a single symbol. In some cases, UE115-amay select the second format based on the second portion of the symbol repetition transmission being one or two symbols.

At620, UE115-amay format the first portion of the symbol repetition transmission according to the selected first format based on the first portion being scheduled for transmission before the repetition partition, and UE115-amay format the second portion of the symbol repetition transmission according to the selected second format based on the second portion being scheduled for transmission after the repetition partition.

At625, UE115-amay transmit, to base station105-a, the first portion of the symbol repetition transmission formatted according to the first format and transmit the second portion of the symbol repetition transmission formatted according to the second format.

At630, base station105-amay process the first portion of the symbol repetition transmission according to the first format and the second portion of the symbol repetition transmission of the message according to the second format.

FIG.7shows a block diagram700of a device705that supports mixed format techniques for orphaned symbols in uplink channel repetitions in accordance with aspects of the present disclosure. The device705may be an example of aspects of a UE115as described herein. The device705may include a receiver710, a communications manager715, and a transmitter720. The device705may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

The receiver710may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to mixed format techniques for orphaned symbols in uplink channel repetitions). Information may be passed on to other components of the device705. The receiver710may be an example of aspects of the transceiver1020described with reference toFIG.10. The receiver710may utilize a single antenna or a set of antennas.

The communications manager715may receive, from a base station, an indication of a configuration for symbol repetition, the configuration including one or more parameters for transmitting a message on a physical uplink channel. The communications manager715may format, based on a first format indicated by the indication of the configuration, a first portion of a set of repetitions of the message scheduled for transmission before a slot boundary. The communications manager715may format based on a second format indicated by the indication of the configuration, a second portion of the set of repetitions of the message scheduled for transmission after the slot boundary, where the second portion of the set of repetitions is a single symbol. The communications manager715may transmit, to the base station, the first portion of the set of repetitions formatted according to the first format and the second portion of the set of repetitions according to the second format. The communications manager715may be an example of aspects of the communications manager1010described herein.

The transmitter720may transmit signals generated by other components of the device705. In some examples, the transmitter720may be collocated with a receiver710in a transceiver module. For example, the transmitter720may be an example of aspects of the transceiver1020described with reference toFIG.10. The transmitter720may utilize a single antenna or a set of antennas.

FIG.8shows a block diagram800of a device805that supports mixed format techniques for orphaned symbols in uplink channel repetitions in accordance with aspects of the present disclosure. The device805may be an example of aspects of a device705, or a UE115as described herein. The device805may include a receiver810, a communications manager815, and a transmitter835. The device805may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

The receiver810may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to mixed format techniques for orphaned symbols in uplink channel repetitions). Information may be passed on to other components of the device805. The receiver810may be an example of aspects of the transceiver1020described with reference toFIG.10. The receiver810may utilize a single antenna or a set of antennas.

The communications manager815may be an example of aspects of the communications manager715as described herein. The communications manager815may include a parameter manager820, a format manager825, and an uplink manager830. The communications manager815may be an example of aspects of the communications manager1010described herein.

The parameter manager820may receive, from a base station, an indication of a configuration for symbol repetition, the configuration including one or more parameters for transmitting a message on a physical uplink channel. The format manager825may format, based on a first format indicated by the indication of the configuration, a first portion of a set of repetitions of the message scheduled for transmission before a slot boundary. The format manager825may format, based on a second format indicated by the indication of the configuration, a second portion of the set of repetitions of the message scheduled for transmission after the slot boundary, where the second portion of the set of repetitions is a single symbol. The uplink manager830may transmit, to the base station, the first portion of the set of repetitions formatted according to the first format and the second portion of the set of repetitions according to the second format. In some examples, the second format may support or be used for sequence-based transmissions (e.g., without a demodulation reference signal (DMRS) or transmissions without a DMRS-based structure). In some cases, the first format may support or be used for DMRS-based transmissions, and the second format may not support DMRS-based transmissions.

The transmitter835may transmit signals generated by other components of the device805. In some examples, the transmitter835may be collocated with a receiver810in a transceiver module. For example, the transmitter835may be an example of aspects of the transceiver1020described with reference toFIG.10. The transmitter835may utilize a single antenna or a set of antennas.

FIG.9shows a block diagram900of a communications manager905that supports mixed format techniques for orphaned symbols in uplink channel repetitions in accordance with aspects of the present disclosure. The communications manager905may be an example of aspects of a communications manager715, a communications manager815, or a communications manager1010described herein. The communications manager905may include a parameter manager910, a format manager915, an uplink manager920, a selection manager925, and a message manager930. Each of these modules may communicate, directly or indirectly, with one another (e.g., via one or more buses).

The parameter manager910may receive, from a base station, an indication of a configuration for symbol repetition, the configuration including one or more parameters for transmitting a message on a physical uplink channel. In some cases, the one or more parameters include an indication of a number of repetitions, an indication of a length of the repetition, an indication of a starting symbol for the repetition, or any combination thereof.

The format manager915may format, based on a first format indicated by the indication of the configuration, a first portion of a set of repetitions of the message scheduled for transmission before a slot boundary, and based on a second format indicated by the indication of the configuration, a second portion of the set of repetitions of the message scheduled for transmission after the slot boundary, where the second portion of the set of repetitions is a single symbol. In some cases, the first portion of the message includes two or more symbols.

In some cases, the physical uplink channel includes a physical uplink control channel. In some cases, the first format includes a physical uplink control channel format 1 and the second format includes a physical uplink control channel format 0. In some cases, the first format includes a physical uplink control channel format 1 and the second format includes a modified physical uplink control channel format 2. In some cases, the first format includes a physical uplink control channel format 3 and the second format includes a modified physical uplink control channel format 0. In some cases, the first format includes a physical uplink control channel format 3 and the second format includes a physical uplink control channel format 2. In some cases, the first format includes a physical uplink control channel format 4 and the second format includes a modified physical uplink control channel format 0. In some cases, the first format includes a physical uplink control channel format 4 and the second format includes a physical uplink control channel format 2.

The uplink manager920may transmit, to the base station, the first portion of the set of repetitions formatted according to the first format and the second portion of the set of repetitions according to the second format.

The selection manager925may select the second format based on a number of bits supported by the first format, where formatting the second portion of the set of repetitions is based on selecting the second format. In some examples, the selection manager925may select the second format based on the number of bits supported by the second format matching the number of bits supported by the first format, where formatting the second portion of the set of repetitions is based on selecting the second format. In some examples, the selection manager925may select the second format based on the second format supporting a demodulation reference signal and data being encoded or multiplexed within a single symbol.

In some examples, the selection manager925may select a modified physical uplink control channel format, where a number of bits supported by the modified physical uplink control channel format matches the number of bits supported by the first format. In some examples, the selection manager925may select the second format based on a number of resource blocks supported by the first format.

In some examples, the selection manager925may select the second format based on a number of resource blocks supported by the second format matching the number of resource blocks supported by the first format. In some examples, the selection manager925may select a modified physical uplink control channel format, where a number of resource blocks supported by the modified physical uplink control channel format matches the number of resource blocks supported by the first format, and where a number of bits supported by the modified physical uplink control channel format matches the number of bits supported by the first format.

In some cases, the number of bits supported by the first format and the second format is 2 bits or less. In some cases, the number of bits supported by the first format and the second format is greater than 2 bits.

The message manager930may receive the indication of the configuration in a radio resource control message, or a media access control-control element message, or a downlink control information message, or any combination thereof.

FIG.10shows a diagram of a system1000including a device1005that supports mixed format techniques for orphaned symbols in uplink channel repetitions in accordance with aspects of the present disclosure. The device1005may be an example of or include the components of device705, device805, or a UE115as described herein. The device1005may include components for bi-directional voice and data communications including components for transmitting and receiving communications, including a communications manager1010, an I/O controller1015, a transceiver1020, an antenna1025, memory1030, and a processor1040. These components may be in electronic communication via one or more buses (e.g., bus1045).

The communications manager1010may receive, from a base station, an indication of a configuration for symbol repetition, the configuration including one or more parameters for transmitting a message on a physical uplink channel, format, based on a first format indicated by the indication of the configuration, a first portion of a set of repetitions of the message scheduled for transmission before a slot boundary, and based on a second format indicated by the indication of the configuration, a second portion of the set of repetitions of the message scheduled for transmission after the slot boundary, where the second portion of the set of repetitions is a single symbol, and transmit, to the base station, the first portion of the set of repetitions formatted according to the first format and the second portion of the set of repetitions according to the second format.

The I/O controller1015may manage input and output signals for the device1005. The I/O controller1015may also manage peripherals not integrated into the device1005. In some cases, the I/O controller1015may represent a physical connection or port to an external peripheral. In some cases, the I/O controller1015may utilize an operating system such as iOS®, ANDROID®, MS-DOS®, MS-WINDOWS®, OS/2®, UNIX®, LINUX®, or another known operating system. In other cases, the I/O controller1015may represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device. In some cases, the I/O controller1015may be implemented as part of a processor. In some cases, a user may interact with the device1005via the I/O controller1015or via hardware components controlled by the I/O controller1015.

In some cases, the wireless device may include a single antenna1025. However, in some cases the device may have more than one antenna1025, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.

The code1035may include instructions to implement aspects of the present disclosure, including instructions to support wireless communications. The code1035may be stored in a non-transitory computer-readable medium such as system memory or other type of memory. In some cases, the code1035may not be directly executable by the processor1040but may cause a computer (e.g., when compiled and executed) to perform functions described herein.

FIG.11shows a block diagram1100of a device1105that supports mixed format techniques for orphaned symbols in uplink channel repetitions in accordance with aspects of the present disclosure. The device1105may be an example of aspects of a base station105as described herein. The device1105may include a receiver1110, a communications manager1115, and a transmitter1120. The device1105may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

The communications manager1115may transmit, to a UE, an indication of a configuration for symbol repetition, the configuration including one or more parameters for transmitting a message on a physical uplink channel. The communications manager1115may receive, from the UE, a first portion of a set of repetitions of the message transmitted before a slot boundary and formatted according to a first format indicated by the indication of the configuration. The communications manager1115may receive, from the UE, a second portion of the set of repetitions of the message transmitted after the slot boundary and formatted according to a second format indicated by the indication of the configuration, the second portion of the set of repetitions being a single symbol. The communications manager1115may process the first portion of the set of repetitions of the message according to the first format and the second portion of the set of repetitions of the message according to the second format. The communications manager1115may be an example of aspects of the communications manager1410described herein.

The receiver1210may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to mixed format techniques for orphaned symbols in uplink channel repetitions). Information may be passed on to other components of the device1205. The receiver1210may be an example of aspects of the transceiver1420described with reference toFIG.14. The receiver1210may utilize a single antenna or a set of antennas.

The communications manager1215may be an example of aspects of the communications manager1115as described herein. The communications manager1215may include a configuration manager1220, a repetition manager1225, and a processing manager1230. The communications manager1215may be an example of aspects of the communications manager1410described herein.

The configuration manager1220may transmit, to a UE, an indication of a configuration for symbol repetition, the configuration including one or more parameters for transmitting a message on a physical uplink channel.

The repetition manager1225may receive, from the UE, a first portion of a set of repetitions of the message transmitted before a slot boundary and formatted according to a first format indicated by the indication of the configuration, and a second portion of the set of repetitions of the message transmitted after the slot boundary and formatted according to a second format indicated by the indication of the configuration, the second portion of the set of repetitions being a single symbol.

The processing manager1230may process the first portion of the set of repetitions of the message according to the first format and the second portion of the set of repetitions of the message according to the second format. In some examples, the second format may support or be used for sequence-based transmissions (e.g., without a demodulation reference signal (DMRS) or transmissions without a DMRS-based structure). In some cases, the first format may support or be used for DMRS-based transmissions, and the second format may not support DMRS-based transmissions.

The transmitter1235may transmit signals generated by other components of the device1205. In some examples, the transmitter1235may be collocated with a receiver1210in a transceiver module. For example, the transmitter1235may be an example of aspects of the transceiver1420described with reference toFIG.14. The transmitter1235may utilize a single antenna or a set of antennas.

FIG.13shows a block diagram1300of a communications manager1305that supports mixed format techniques for orphaned symbols in uplink channel repetitions in accordance with aspects of the present disclosure. The communications manager1305may be an example of aspects of a communications manager1115, a communications manager1215, or a communications manager1410described herein. The communications manager1305may include a configuration manager1310, a repetition manager1315, a processing manager1320, and an indication manager1325. Each of these modules may communicate, directly or indirectly, with one another (e.g., via one or more buses).

The configuration manager1310may transmit, to a UE, an indication of a configuration for symbol repetition, the configuration including one or more parameters for transmitting a message on a physical uplink channel. In some examples, the configuration manager1310may transmit the configuration in a radio resource control message, or a media access control-control element message, or a downlink control information message, or any combination thereof. In some cases, the first portion of the message includes two or more symbols. In some cases, the physical uplink channel includes a physical uplink control channel.

In some cases, the first format includes a physical uplink control channel format 1 and the second format includes a physical uplink control channel format 0. In some cases, the first format includes a physical uplink control channel format 1 and the second format includes a modified physical uplink control channel format 2.

In some cases, the first format includes a physical uplink control channel format 3 and the second format includes a modified physical uplink control channel format 0. In some cases, the first format includes a physical uplink control channel format 3 and the second format includes a physical uplink control channel format 2.

In some cases, the first format includes a physical uplink control channel format 4 and the second format includes a modified physical uplink control channel format 0. In some cases, the first format includes a physical uplink control channel format 4 and the second format includes a physical uplink control channel format 2.

In some cases, the one or more parameters include an indication of a number of repetitions, an indication of a length of the repetition, an indication of a starting symbol for the repetition, or any combination thereof.

The repetition manager1315may receive, from the UE, a first portion of a set of repetitions of the message transmitted before a slot boundary and formatted according to a first format indicated by the indication of the configuration, and a second portion of the set of repetitions of the message transmitted after the slot boundary and formatted according to a second format indicated by the indication of the configuration, the second portion of the set of repetitions being a single symbol.

The processing manager1320may process the first portion of the set of repetitions of the message according to the first format and the second portion of the set of repetitions of the message according to the second format. The indication manager1325may indicate, via the indication of the configuration, a selection of the second format for the UE to use based on a number of bits supported by the first format.

In some examples, the indication manager1325may indicate, via the indication of the configuration, a selection of the second format for the UE to use based on a number of bits supported by the second format matching the number of bits supported by the first format. In some examples, the indication manager1325may indicate, via the indication of the configuration, a modified physical uplink control channel format, where a number of bits supported by the modified physical uplink control channel format matches the number of bits supported by the first format. In some examples, the indication manager1325may indicate, via the indication of the configuration, a selection of the second format for the UE to use based on the second format supporting a demodulation reference signal and data being encoded or multiplexed within a single symbol.

In some examples, the indication manager1325may indicate, via the indication of the configuration, a selection of the second format for the UE to use based on a number of resource blocks supported by the first format. In some examples, the indication manager1325may indicate, via the indication of the configuration, a selection of the second format for the UE to use based on a number of resource blocks supported by the second format matching the number of resource blocks supported by the first format.

In some examples, the indication manager1325may indicate, via the indication of the configuration, a modified physical uplink control channel format, where a number of resource blocks supported by the modified physical uplink control channel format matches the number of resource blocks supported by the first format, and where a number of bits supported by the modified physical uplink control channel format matches the number of bits supported by the first format.

In some cases, the number of bits supported by the first format and the second format is 2 bits or less. In some cases, the number of bits supported by the first format and the second format is greater than 2 bits.

FIG.14shows a diagram of a system1400including a device1405that supports mixed format techniques for orphaned symbols in uplink channel repetitions in accordance with aspects of the present disclosure. The device1405may be an example of or include the components of device1105, device1205, or a base station105as described herein. The device1405may include components for bi-directional voice and data communications including components for transmitting and receiving communications, including a communications manager1410, a network communications manager1415, a transceiver1420, an antenna1425, memory1430, a processor1440, and an inter-station communications manager1445. These components may be in electronic communication via one or more buses (e.g., bus1450).

The communications manager1410may transmit, to a UE, an indication of a configuration for symbol repetition, the configuration including one or more parameters for transmitting a message on a physical uplink channel. The communications manager1410may receive, from the UE, a first portion of a set of repetitions of the message transmitted before a slot boundary and formatted according to a first format indicated by the indication of the configuration, and a second portion of the set of repetitions of the message transmitted after the slot boundary and formatted according to a second format indicated by the indication of the configuration, the second portion of the set of repetitions being a single symbol. The communications manager1410may process the first portion of the set of repetitions of the message according to the first format and the second portion of the set of repetitions of the message according to the second format.

In some cases, the wireless device may include a single antenna1425. However, in some cases the device may have more than one antenna1425, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.

The memory1430may include RAM, ROM, or a combination thereof. The memory1430may store computer-readable code1435including instructions that, when executed by a processor (e.g., the processor1440) cause the device to perform various functions described herein. In some cases, the memory1430may contain, among other things, a BIOS which may control basic hardware or software operation such as the interaction with peripheral components or devices.

The code1435may include instructions to implement aspects of the present disclosure, including instructions to support wireless communications. The code1435may be stored in a non-transitory computer-readable medium such as system memory or other type of memory. In some cases, the code1435may not be directly executable by the processor1440but may cause a computer (e.g., when compiled and executed) to perform functions described herein.

At1505, the UE may receive, from a base station, an indication of a configuration for symbol repetition, the configuration including one or more parameters for transmitting a message on a physical uplink channel. The operations of1505may be performed according to the methods described herein. In some examples, aspects of the operations of1505may be performed by a parameter manager as described with reference toFIGS.7through10.

At1510, the UE may format, based on a first format indicated by the indication of the configuration, a first portion of a set of repetitions of the message scheduled for transmission before a slot boundary, and based on a second format indicated by the indication of the configuration, a second portion of the set of repetitions of the message scheduled for transmission after the slot boundary, where the second portion of the set of repetitions is a single symbol. The operations of1510may be performed according to the methods described herein. In some examples, aspects of the operations of1510may be performed by a format manager as described with reference toFIGS.7through10.

At1515, the UE may transmit, to the base station, the first portion of the set of repetitions formatted according to the first format and the second portion of the set of repetitions according to the second format. The operations of1515may be performed according to the methods described herein. In some examples, aspects of the operations of1515may be performed by an uplink manager as described with reference toFIGS.7through10.

FIG.16shows a flowchart illustrating a method1600that supports mixed format techniques for orphaned symbols in uplink channel repetitions in accordance with aspects of the present disclosure. The operations of method1600may be implemented by a UE115or its components as described herein. For example, the operations of method1600may be performed by a communications manager as described with reference toFIGS.7through10. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the functions described herein. Additionally or alternatively, a UE may perform aspects of the functions described herein using special-purpose hardware.

At1605, the UE may receive, from a base station, an indication of a configuration for symbol repetition, the configuration including one or more parameters for transmitting a message on a physical uplink channel. The operations of1605may be performed according to the methods described herein. In some examples, aspects of the operations of1605may be performed by a parameter manager as described with reference toFIGS.7through10.

At1610, the UE may format, based on a first format indicated by the indication of the configuration, a first portion of a set of repetitions of the message scheduled for transmission before a slot boundary, and based on a second format indicated by the indication of the configuration, a second portion of the set of repetitions of the message scheduled for transmission after the slot boundary, where the second portion of the set of repetitions is a single symbol. The operations of1610may be performed according to the methods described herein. In some examples, aspects of the operations of1610may be performed by a format manager as described with reference toFIGS.7through10.

At1615, the UE may transmit, to the base station, the first portion of the set of repetitions formatted according to the first format and the second portion of the set of repetitions according to the second format. The operations of1615may be performed according to the methods described herein. In some examples, aspects of the operations of1615may be performed by an uplink manager as described with reference toFIGS.7through10.

At1620, the UE may select the second format based on a number of bits supported by the first format, where formatting the second portion of the set of repetitions is based on selecting the second format. The operations of1620may be performed according to the methods described herein. In some examples, aspects of the operations of1620may be performed by a selection manager as described with reference toFIGS.7through10.

At1625, the UE may select the second format based on a number of resource blocks supported by the first format. The operations of1625may be performed according to the methods described herein. In some examples, aspects of the operations of1625may be performed by a selection manager as described with reference toFIGS.7through10.

FIG.17shows a flowchart illustrating a method1700that supports mixed format techniques for orphaned symbols in uplink channel repetitions in accordance with aspects of the present disclosure. The operations of method1700may be implemented by a base station105or its components as described herein. For example, the operations of method1700may be performed by a communications manager as described with reference toFIGS.11through14. In some examples, a base station may execute a set of instructions to control the functional elements of the base station to perform the functions described herein. Additionally or alternatively, a base station may perform aspects of the functions described herein using special-purpose hardware.

At1705, the base station may transmit, to a UE, an indication of a configuration for symbol repetition, the configuration including one or more parameters for transmitting a message on a physical uplink channel. The operations of1705may be performed according to the methods described herein. In some examples, aspects of the operations of1705may be performed by a configuration manager as described with reference toFIGS.11through14.

At1710, the base station may receive, from the UE, a first portion of a set of repetitions of the message transmitted before a slot boundary and formatted according to a first format indicated by the indication of the configuration, and a second portion of the set of repetitions of the message transmitted after the slot boundary and formatted according to a second format indicated by the indication of the configuration, the second portion of the set of repetitions being a single symbol. The operations of1710may be performed according to the methods described herein. In some examples, aspects of the operations of1710may be performed by a repetition manager as described with reference toFIGS.11through14.

At1715, the base station may process the first portion of the set of repetitions of the message according to the first format and the second portion of the set of repetitions of the message according to the second format. The operations of1715may be performed according to the methods described herein. In some examples, aspects of the operations of1715may be performed by a processing manager as described with reference toFIGS.11through14.

FIG.18shows a flowchart illustrating a method1800that supports mixed format techniques for orphaned symbols in uplink channel repetitions in accordance with aspects of the present disclosure. The operations of method1800may be implemented by a base station105or its components as described herein. For example, the operations of method1800may be performed by a communications manager as described with reference toFIGS.11through14. In some examples, a base station may execute a set of instructions to control the functional elements of the base station to perform the functions described herein. Additionally or alternatively, a base station may perform aspects of the functions described herein using special-purpose hardware.18

At1805, the base station may transmit, to a UE, an indication of a configuration for symbol repetition, the configuration including one or more parameters for transmitting a message on a physical uplink channel. The operations of1805may be performed according to the methods described herein. In some examples, aspects of the operations of1805may be performed by a configuration manager as described with reference toFIGS.11through14.

At1810, the base station may receive, from the UE, a first portion of a set of repetitions of the message transmitted before a slot boundary and formatted according to a first format indicated by the indication of the configuration, and a second portion of the set of repetitions of the message transmitted after the slot boundary and formatted according to a second format indicated by the indication of the configuration, the second portion of the set of repetitions being a single symbol. The operations of1810may be performed according to the methods described herein. In some examples, aspects of the operations of1810may be performed by a repetition manager as described with reference toFIGS.11through14.

At1815, the base station may process the first portion of the set of repetitions of the message according to the first format and the second portion of the set of repetitions of the message according to the second format. The operations of1815may be performed according to the methods described herein. In some examples, aspects of the operations of1815may be performed by a processing manager as described with reference toFIGS.11through14.

At1820, the base station may indicate, via the indication of the configuration, a selection of the second format for the UE to use based on a number of bits supported by the first format. The operations of1820may be performed according to the methods described herein. In some examples, aspects of the operations of1820may be performed by an indication manager as described with reference toFIGS.11through14.

At1825, the base station may indicate, via the indication of the configuration, a selection of the second format for the UE to use based on a number of resource blocks supported by the first format. The operations of1825may be performed according to the methods described herein. In some examples, aspects of the operations of1825may be performed by an indication manager as described with reference toFIGS.11through14.

Aspect 1: A method for wireless communication by a UE, comprising: receiving, from a base station, an indication of a configuration for symbol repetition, the configuration comprising one or more parameters for transmitting a message on a physical uplink channel; formatting, based at least in part on a first format indicated by the indication of the configuration, a first portion of a set of repetitions of the message scheduled for transmission before a slot boundary, and based at least in part on a second format indicated by the indication of the configuration, a second portion of the set of repetitions of the message scheduled for transmission after the slot boundary, wherein the second portion of the set of repetitions is a single symbol; and transmitting, to the base station, the first portion of the set of repetitions formatted according to the first format and the second portion of the set of repetitions according to the second format.

Aspect 2: The method of aspect 1, further comprising: selecting the second format based at least in part on a number of bits supported by the first format, wherein formatting the second portion of the set of repetitions is based at least in part on selecting the second format.

Aspect 3: The method of aspect 2, further comprising: selecting the second format based at least in part on the number of bits supported by the second format matching the number of bits supported by the first format, wherein formatting the second portion of the set of repetitions is based at least in part on selecting the second format.

Aspect 4: The method of any of aspects 2 through 3, wherein selecting the second format comprises: selecting a modified physical uplink control channel format, wherein a number of bits supported by the modified physical uplink control channel format matches the number of bits supported by the first format.

Aspect 5: The method of any of aspects 2 through 4, wherein the number of bits supported by the first format and the second format is 2 bits or less.

Aspect 6: The method of any of aspects 2 through 5, wherein the number of bits supported by the first format and the second format is greater than 2 bits.

Aspect 7: The method of any of aspects 1 through 6, further comprising: selecting the second format based at least in part on a number of resource blocks supported by the first format.

Aspect 8: The method of aspect 7, further comprising: selecting the second format based at least in part on a number of resource blocks supported by the second format matching the number of resource blocks supported by the first format.

Aspect 9: The method of any of aspects 7 through 8, wherein selecting the second format comprises: selecting a modified physical uplink control channel format, wherein a number of resource blocks supported by the modified physical uplink control channel format matches the number of resource blocks supported by the first format, and wherein a number of bits supported by the modified physical uplink control channel format matches the number of bits supported by the first format.

Aspect 10: The method of any of aspects 1 through 9, further comprising: selecting the second format based at least in part on the second format supporting a demodulation reference signal and data being encoded or multiplexed within a single symbol.

Aspect 11: The method of any of aspects 1 through 10, wherein receiving the indication of the configuration comprises: receiving the indication of the configuration in a radio resource control message, or a media access control-control element message, or a downlink control information message, or any combination thereof.

Aspect 12: The method of any of aspects 1 through 11, wherein the second format is configured for sequence-based transmissions.

Aspect 13: The method of any of aspects 1 through 12, wherein the first portion of the message comprises two or more symbols.

Aspect 14: The method of any of aspects 1 through 13, wherein the physical uplink channel comprises a physical uplink control channel.

Aspect 15: The method of any of aspects 1 through 14, wherein the first format comprises a physical uplink control channel format 1 and the second format comprises a physical uplink control channel format 0.

Aspect 16: The method of any of aspects 1 through 15, wherein the first format comprises a physical uplink control channel format 1 and the second format comprises a modified physical uplink control channel format 2.

Aspect 17: The method of any of aspects 1 through 16, wherein the first format comprises a physical uplink control channel format 3 and the second format comprises a modified physical uplink control channel format 0.

Aspect 18: The method of any of aspects 1 through 17, wherein the first format comprises a physical uplink control channel format 3 and the second format comprises a physical uplink control channel format 2.

Aspect 19: The method of any of aspects 1 through 18, wherein the first format comprises a physical uplink control channel format 4 and the second format comprises a modified physical uplink control channel format 0.

Aspect 20: The method of any of aspects 1 through 19, wherein the first format comprises a physical uplink control channel format 4 and the second format comprises a physical uplink control channel format 2.

Aspect 21: The method of any of aspects 1 through 20, wherein the one or more parameters comprise an indication of a number of repetitions, an indication of a length of the repetition, an indication of a starting symbol for the repetition, or any combination thereof.

Aspect 22: A method for wireless communication by a base station, comprising: transmitting, to a UE, an indication of a configuration for symbol repetition, the configuration comprising one or more parameters for transmitting a message on a physical uplink channel; receiving, from the UE, a first portion of a set of repetitions of the message transmitted before a slot boundary and formatted according to a first format indicated by the indication of the configuration, and a second portion of the set of repetitions of the message transmitted after the slot boundary and formatted according to a second format indicated by the indication of the configuration, the second portion of the set of repetitions being a single symbol; and processing the first portion of the set of repetitions of the message according to the first format and the second portion of the set of repetitions of the message according to the second format.

Aspect 23: The method of aspect 22, further comprising: indicating, via the indication of the configuration, a selection of the second format for the UE to use based at least in part on a number of bits supported by the first format.

Aspect 24: The method of aspect 23, further comprising: indicating, via the indication of the configuration, a selection of the second format for the UE to use based at least in part on a number of bits supported by the second format matching the number of bits supported by the first format.

Aspect 25: The method of any of aspects 23 through 24, further comprising: indicating, via the indication of the configuration, a modified physical uplink control channel format, wherein a number of bits supported by the modified physical uplink control channel format matches the number of bits supported by the first format.

Aspect 26: The method of any of aspects 23 through 25, wherein the number of bits supported by the first format and the second format is 2 bits or less.

Aspect 27: The method of any of aspects 23 through 26, wherein the number of bits supported by the first format and the second format is greater than 2 bits.

Aspect 28: The method of any of aspects 22 through 27, further comprising: indicating, via the indication of the configuration, a selection of the second format for the UE to use based at least in part on a number of resource blocks supported by the first format.

Aspect 29: An apparatus for wireless communication by a UE, comprising a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method of any of aspects 1 through 21.

Aspect 30: An apparatus for wireless communication by a UE, comprising at least one means for performing a method of any of aspects 1 through 21.

Aspect 33: An apparatus for wireless communication by a base station, comprising at least one means for performing a method of any of aspects 22 through 28.