INTER-USER EQUIPMENT (UE) COORDINATION FOR SIDELINK IN AN UNLICENSED OR SHARED SPECTRUM

Methods, systems, and devices for wireless communications are described. A first user equipment (UE) may receive an inter-UE coordination request message from a second UE, the inter-UE coordination request message identifying a request for resource scheduling information for the first UE, the second UE, or both. The first UE may transmit an inter-UE coordination response message comprising the scheduling information to the second UE, the scheduling information comprising an indication of one or more of a resource block set and interlacing pattern frequency configuration for multi-slot burst communications between the first UE and the second UE or a starting slot and slot burst length configuration for the multi-slot burst communications between the first UE and the second UE.

FIELD OF TECHNOLOGY

The following relates to wireless communication, including inter-user equipment (UE) coordination for sidelink in an unlicensed or shared spectrum.

BACKGROUND

SUMMARY

The described techniques relate to improved methods, systems, devices, and apparatuses that support inter-user equipment (UE) coordination (IUC) for sidelink in an unlicensed or shared spectrum. For example, the described techniques provide IUC techniques with improved resource signaling for inter-UE communications. A first UE may wirelessly communicate with a second UE (e.g., using a sidelink or PC5 interface). The first UE may receive or otherwise obtain an IUC request message from the second UE. The IUC request message may carry or otherwise convey information identifying a request for resource scheduling information for the first UE, the second UE, or both the first UE and second UE. For example, the IUC request message may indicate preferred resources for use and/or non-preferred resources to be avoided for the first UE, the second UE, or both UE. The first UE may transmit or otherwise provide an IUC response message to the second UE. The IUC response message may carry or otherwise convey an indication of the scheduling information to the second UE. The scheduling information may include, for example, an indication of a resource block (RB) set and interlacing pattern frequency configuration, a starting slot and slot burst length configuration, or both, for multi-slot burst communications between the first UE and the second UE.

A method for wireless communication at a first UE is described. The method may include receiving an IUC request message from a second UE, the IUC request message identifying a request for resource scheduling information for the first UE, the second UE, or both and transmitting an IUC response message including the scheduling information to the second UE, the scheduling information including an indication of one or more of a RB set and interlacing pattern frequency configuration for multi-slot burst communications between the first UE and the second UE or a starting slot and slot burst length configuration for the multi-slot burst communications between the first UE and the second UE.

An apparatus for wireless communication at a first UE is described. The apparatus may include a processor, memory in electronic communication with the processor, and instructions stored in the memory. The instructions may be executable by the processor to receive an IUC request message from a second UE, the IUC request message identifying a request for resource scheduling information for the first UE, the second UE, or both and transmit an IUC response message including the scheduling information to the second UE, the scheduling information including an indication of one or more of a RB set and interlacing pattern frequency configuration for multi-slot burst communications between the first UE and the second UE or a starting slot and slot burst length configuration for the multi-slot burst communications between the first UE and the second UE.

Another apparatus for wireless communication at a first UE is described. The apparatus may include means for receiving an IUC request message from a second UE, the IUC request message identifying a request for resource scheduling information for the first UE, the second UE, or both and means for transmitting an IUC response message including the scheduling information to the second UE, the scheduling information including an indication of one or more of a RB set and interlacing pattern frequency configuration for multi-slot burst communications between the first UE and the second UE or a starting slot and slot burst length configuration for the multi-slot burst communications between the first UE and the second UE.

A non-transitory computer-readable medium storing code for wireless communication at a first UE is described. The code may include instructions executable by a processor to receive an IUC request message from a second UE, the IUC request message identifying a request for resource scheduling information for the first UE, the second UE, or both and transmit an IUC response message including the scheduling information to the second UE, the scheduling information including an indication of one or more of a RB set and interlacing pattern frequency configuration for multi-slot burst communications between the first UE and the second UE or a starting slot and slot burst length configuration for the multi-slot burst communications between the first UE and the second UE.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for identifying, based on the IUC request message, a first RB set and interlacing pattern frequency configuration and a first starting slot and slot burst length configuration for the multi-slot burst communications between the first UE and the second UE, where the indicated RB set and interlacing pattern frequency configuration may be based on the first RB set and interlacing pattern frequency configuration and the indicated starting slot and the slot burst length configuration may be based on the first starting slot and slot burst length configuration.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first RB set and interlacing pattern frequency configuration include a field indicating the starting RB set and number of continuous RB sets or a bitmap where each bit in the bitmap may be configured to indicate the starting RB set and continuous or discontinuous RB sets.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first RB set and interlacing pattern frequency configuration includes a starting RB set with a number of continuous or discontinuous RB sets and an interlacing pattern for the starting RB set and continuous or discontinuous RB sets.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first starting slot and slot burst length configuration includes a timing resource indication value identifying the starting slot and a number of slots included for multi-slot burst communications between the first UE and the second UE.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, transmitting the IUC response message may include operations, features, means, or instructions for transmitting, in the IUC response message, the indication of the starting slot and slot burst length configuration that includes a timing resource indication value identifying the starting slot and a number of slots included for multi-slot burst communications between the first UE and the second UE.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the indication of the number of slots included for multi-slot burst communications includes a shared indication of the number of slots that may be included in each instance of the multi-slot burst communications, a first indication of the number of slots that may be included in a first instance of the multi-slot burst communications and a second indication of the number of slots that may be included in one or more additional instances of the multi-slot burst communications, or a separate indication of the number of slots that may be included for each instance of the multi-slot burst communications.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the indication of the number of slots included for the multi-slot burst communication includes one or more fields indicating the number of slots included for the multi-slot burst communications, where each field of the one or more fields may have a shared field length or a different field length.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the indication of the timing resource indication value includes an earliest starting slot for the multi-slot burst communications.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, transmitting the IUC response message may include operations, features, means, or instructions for transmitting, in the IUC response message, the indication of the RB set and interlacing pattern frequency configuration that includes a starting RB set with a number of continuous or discontinuous RB sets and an interlacing pattern for the starting RB set and continuous or discontinuous RB sets.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the indication of the interlacing pattern includes an interlacing pattern for a starting interlacing pattern for a first instance of the multi-slot burst communications and a shared offset value identifying the offset between each instance of the multi-slot burst communications.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the indication of the interlacing pattern includes a bitmap where each bit in the bitmap may be configured to identify a starting interlacing pattern for a first instance of the multi-slot burst communications and a separate offset value for each subsequent instance of the multi-slot burst communications identifying the offset between each instance.

A method for wireless communication at a second UE is described. The method may include transmitting an IUC request message from a first UE, the IUC request message identifying a request for resource scheduling information for the first UE, the second UE, or both and receiving an IUC response message including the scheduling information from the first UE, the scheduling information including an indication of one or more of a RB set and interlacing pattern frequency configuration for multi-slot burst communications between the first UE and the second UE or a starting slot and slot burst length configuration for the multi-slot burst communications between the first UE and the second UE.

An apparatus for wireless communication at a second UE is described. The apparatus may include a processor, memory in electronic communication with the processor, and instructions stored in the memory. The instructions may be executable by the processor to transmit an IUC request message from a first UE, the IUC request message identifying a request for resource scheduling information for the first UE, the second UE, or both and receive an IUC response message including the scheduling information from the first UE, the scheduling information including an indication of one or more of a RB set and interlacing pattern frequency configuration for multi-slot burst communications between the first UE and the second UE or a starting slot and slot burst length configuration for the multi-slot burst communications between the first UE and the second UE.

Another apparatus for wireless communication at a second UE is described. The apparatus may include means for transmitting an IUC request message from a first UE, the IUC request message identifying a request for resource scheduling information for the first UE, the second UE, or both and means for receiving an IUC response message including the scheduling information from the first UE, the scheduling information including an indication of one or more of a RB set and interlacing pattern frequency configuration for multi-slot burst communications between the first UE and the second UE or a starting slot and slot burst length configuration for the multi-slot burst communications between the first UE and the second UE.

A non-transitory computer-readable medium storing code for wireless communication at a second UE is described. The code may include instructions executable by a processor to transmit an IUC request message from a first UE, the IUC request message identifying a request for resource scheduling information for the first UE, the second UE, or both and receive an IUC response message including the scheduling information from the first UE, the scheduling information including an indication of one or more of a RB set and interlacing pattern frequency configuration for multi-slot burst communications between the first UE and the second UE or a starting slot and slot burst length configuration for the multi-slot burst communications between the first UE and the second UE.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for identifying, based on the IUC request message, a first RB set and interlacing pattern frequency configuration and a first starting slot and slot burst length configuration for the multi-slot burst communications between the first UE and the second UE, where the indicated RB set and interlacing pattern frequency configuration may be based on the first RB set and interlacing pattern frequency configuration and the indicated starting slot and the slot burst length configuration may be based on the first starting slot and slot burst length configuration.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first RB set and interlacing pattern frequency configuration include a field indicating the starting RB set and number of continuous RB sets or a bitmap where each bit in the bitmap may be configured to indicate the starting RB set and continuous or discontinuous RB sets.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first RB set and interlacing pattern frequency configuration includes a starting RB set with a number of continuous or discontinuous RB sets and an interlacing pattern for the starting RB set and continuous or discontinuous RB sets.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first starting slot and slot burst length configuration includes a timing resource indication value identifying the starting slot and a number of slots included for multi-slot burst communications between the first UE and the second UE.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for identifying, based on the IUC response message, the indication of the starting slot and slot burst length configuration that includes a timing resource indication value identifying the starting slot and a number of slots included for multi-slot burst communications between the first UE and the second UE.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the indication of the number of slots included for multi-slot burst communications includes a shared indication of the number of slots that may be included in each instance of the multi-slot burst communications, a first indication of the number of slots that may be included in a first instance of the multi-slot burst communications and a second indication of the number of slots that may be included in one or more additional instances of the multi-slot burst communications, or a separate indication of the number of slots that may be included for each instance of the multi-slot burst communications.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the indication of the number of slots included for the multi-slot burst communication includes one or more fields indicating the number of slots included for the multi-slot burst communications, where each field of the one or more fields may have a shared field length or a different field length.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the indication of the timing resource indication value includes an earliest starting slot for the multi-slot burst communications.

Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for identifying, based at lest in part on the IUC response message, the indication of the RB set and interlacing pattern frequency configuration that includes a starting RB set with a number of continuous or discontinuous RB sets and an interlacing pattern for the starting RB set and continuous or discontinuous RB sets.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the indication of the interlacing pattern includes an interlacing pattern for a starting interlacing pattern for a first instance of the multi-slot burst communications and a shared offset value identifying the offset between each instance of the multi-slot burst communications.

In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the indication of the interlacing pattern includes a bitmap where each bit in the bitmap may be configured to identify a starting interlacing pattern for a first instance of the multi-slot burst communications and a separate offset value for each subsequent instance of the multi-slot burst communications identifying the offset between each instance.

DETAILED DESCRIPTION

Wireless networks may support inter-user equipment (UE) coordination (IUC) between UEs. For example, a first UE may communicate with a second UE over a sidelink. The first UE may transmit an IUC message to the second UE identifying a set of preferred resources, or a set of non-preferred resources, that may be used for scheduling decisions by the second UE. The preferred or non-preferred resources may include resources associated with the first UE or resources associated with the second UE.

The first UE may send the IUC message as a response to an IUC request message received from the second UE. The IUC request message may also indicate the preferred resources or non-preferred resources associated with the first UE or the second UE.

However, in some situations the communications between the UE may include multi-slot burst communications performed using one or more resource block (RB) sets. Moreover, different instances of the communications may be repeated across multiple slots according to a burst pattern. Conventional IUC techniques do not provide a mechanism for the first UE or the second UE to indicate (e.g., in the IUC request message and/or in the IUC response message) timing and frequency information supporting multi-slot burst communications between the UE (e.g., signaling RB set information as well as the repetition and offset information).

The described techniques relate to improved methods, systems, devices, and apparatuses that support inter-UE coordination for sidelink in an unlicensed or shared spectrum. For example, the described techniques provide for improved IUC techniques improving resource configurations for inter-UE communications. A first UE may be performing communications with a second UE (e.g., using cellular, Uu interface, techniques and/or using sidelink, PC5 interface, techniques). The first UE may receive or otherwise obtain an IUC request message from the second UE. The IUC request message may carry or otherwise convey information identifying a request for resource scheduling information for the first UE, the second UE, or both the first UE and second UE. For example, the IUC request message may indicate preferred resources and/or resources to be avoided for the first UE, the second UE, or both UE. The first UE may transmit or otherwise provide an IUC response message to the second UE. The IUC response message may carry or otherwise convey an indication of the scheduling information to the second UE. The scheduling information may include an indication of a RB set and interlacing pattern frequency configuration, a starting slot and slot burst length configuration, or both, for multi-slot burst communications between the first UE and the second UE.

A first UE (e.g., UE115) may receive an IUC request message from a second UE (e.g., a different UE115), the IUC request message identifying a request for resource scheduling information for the first UE, the second UE, or both. The first UE may transmit an IUC response message including the scheduling information to the second UE. The scheduling information may include an indication of one or more of: a RB set and interlacing pattern frequency for multi-slot burst communications between the first UE and the second UE or a starting slot and slot burst length for the multi-slot burst communications between the first UE and the second UE.

The second UE (e.g., the other UE115) may transmit an IUC request message from a first UE, the IUC request message identifying a request for resource scheduling information for the first UE, the second UE, or both. The second UE may receive an IUC response message including the scheduling information from the first UE. The scheduling information may include an indication of one or more of a RB set and interlacing pattern frequency for multi-slot burst communications between the first UE and the second UE or a starting slot and slot burst length for the multi-slot burst communications between the first UE and the second UE.

FIG.2illustrates an example of a wireless communications system200that supports IUC for sidelink in an unlicensed or shared spectrum in accordance with one or more aspects of the present disclosure. Wireless communications system200may implement aspects of wireless communication system100. Wireless communications system200may include UE205and UE210, which may be examples of the corresponding devices described herein. That is, UE205and UE210may each be examples of a UE. However, UE205may also be referred to as a first UE while UE210may also be referred to as a second UE. References to the first UE or the second UE are meant to distinguish between a UE transmitting an IUC request message and the UE transmitting an IUC response message. In the non-limiting example illustrated inFIG.2, UE210transmits the IUC request message (e.g., refers to the second UE) and UE205transmits the IUC response message (e.g., refers to the first UE).

Wireless communications system200may support IUC between UE205and UE210. Generally, IUC techniques (such as the techniques described herein) may be employed to improve wireless communications broadly. For example, IUC techniques may be triggered by a certain condition occurring for a particular UE (e.g., one UE experiences a threshold interference from another UE) or more broadly for the network (e.g., increased network traffic may lead to a need for improved coordination between UE). In some examples, the IUC techniques are triggered by an IUC request message. The IUC techniques may generally be enabled or disabled by the network (e.g., using RRC signaling, medium access control-control element (MAC-CE) signaling, or downlink control information (DCI) signaling). The result if the IUC may improve communications between the coordinating UE or may improve communications between one of the coordinating UE that is communicating with different UE or network entity. The IUC techniques may be employed for cellular communications (e.g., Uu interface), for sidelink communications (e.g., PC5 interface), or for other communication protocols.

IUC techniques according to the request-based triggering approach may include the second UE (UE210in this example) transmitting or otherwise providing an IUC request message to the first UE (UE205in this example). In some examples, the second UE uses the IUC request message to indicate its preferred resources. For example, the first UE may be the intended receiver of the second UE. In this scenario, the second UE may want to use resources determined as being available from the perspective of the second UE. This may enable the second UE to perform transmit resource selection based on the physical layer channel sensing determined by the second UE. When determining the preferred resource set indicated in the IUC request, the first UE typically applies a legacy resource selection procedure using the parameters provided in IUC request (e.g., the request for resource scheduling information). For example, the first UE may exclude candidate single-slot resource(s) belonging to slot(s) where the first UE does not expect to perform sidelink reception of a transport block due to half-duplex operations.

In some examples, the IUC request message may signal or otherwise indicate non-preferred resources. For example, if the first UE is an intended receiver from the second UE, the second UE may want to know in what resources the first UE is receiving a high amount of interference from nearby UEs so that second UE can avoid those resources. In the situation where the first UE is not the intended receiver of the second UE, the second UE may not want to create interference for the first UE, and therefore want to know which resources to avoid or to minimize interference to the first UE. Accordingly, the IUC request message may carry or otherwise convey a request for scheduling information (e.g., resource(s)) for the first UE, the second UE, or both UE.

The IUC may occur between the first UE and the second UE using various signaling techniques. For example, the IUC request message may be signaled using a sidelink control information (SCI) two (SCI 2) message, MAC-CE signaling, or other signaling techniques. A SCI message format 2-C may include all the same fields in an SCI message format 2-A, with the exception of a cast type indicator. For example, the IUC request may include a resource pool level (pre-)configuration, which may enable one of the following alternatives. A first alternative may include the MAC CE and SCI 2 being used as the container of an explicit IUC request transmission from the second UE to the first UE. When both SCI format 2-C and MAC-CE are used as the container of an explicit IUC request for IUC information, the same bit field size used for conveying the request in a SCI format 2-C may be applied to the MAC-CE. In some examples, the SCI message format 2-C may be optional for the receiving UE. It is typically up to UE implementation whether to use MAC-CE signaling or to additionally SCI 2 signaling. A second alternative may include MAC-CE signaling being used as the container of an explicit IUC request transmission. When MAC-CE signaling is used as the container of the explicit IUC request requesting IUC information, the same bit field size for the IUC request message in an SCI 2 may be applied to the MAC-CE signaling.

For example, conventional IUC request messages (e.g., using the MAC-CE or MAC-CE and SCI 2 signaling) may include bit(s) indicating whether the IUC request is a request for (non-)preferred resources or is providing (non-)preferred resources (e.g., Providing/requesting indicator). The IUC request message may include bit(s) indicating a priority for the IUC request. The IUC request message may include bit(s) indicating the number of subchannels (e.g., the (non-)preferred resources of the first or second UE). For example, the IUC request message may indicate: ┌log2NsubChannelSL┐, where NsubChannelSLis provided by the higher layer parameter sl-NumSubchannel. The IUC request message may include an indication of a resource reservation period. For example, the IUC request message may indicate Y, where Y=┌log2Nrsv_period┐, with Nrsv_periodbeing the number of entries in the higher layer parameter sl-ResourceReservePeriodList, if the higher layer parameter sl-MultiReserveResource is configured. Otherwise Y=0. The IUC request message may indicate a resource selection window location that identifies the slots to be used for sensing (e.g., slots n+T1and n+T2). For example, the IUC request message may indicate 2(10+┌log2(10*2u)┐), where u is 0, 1, 2, or 3, for SCS of 15 kHz, 30 kHz, 60 kHz, or 120 kHz, respectively. The IUC request message may include a resource set type that uses bit(s) to indicate whether the IUC request is for preferred resources or for non-preferred resources (e.g., when the parameter determineResourceSetTypeScheme1 is set to “UE-B's request.” Otherwise, no bits may be allocated to the resource set type field.

Accordingly, both MAC-CE and SCI 2 may be use for conveying the IUC request message, as well as the IUC response message, with both the MAC-CE and SCI 2 formats using the same or similar fields. Each (non-)preferred resource indicated in the IUC request message and/or the IUC response message may indicate a timing resource indicator value (TRIV), frequency resource indicator value (FRIV), as well as a resource repetition indicator (RRI) identifying the offsets between repetitions of the first resource combination in the time domain. For the IUC response message, the MAC-CE signaling techniques may be used to signal N>2 (non-)preferred resource combinations. For N<2 (non-)preferred resource combination, MAC-CE and additionally SCI 2 signaling may be used for the IUC response message.

In the SCI 2 signaling example, the IUC response message (also referred to simply as IUC information) carried in an SCI message format 2-C may include the same fields as the SCI message format 2-A, with the exception of the cast type indicator. The SCI 2 may be used in addition to MAC-CE signaling when the cast type for the IUC response message is a unicast cast type, in some examples. When both SCI 2 and MAC-CE signaling are used as containers for the IUC information, a slot offset of up to 255 may be supported.

In the SCI 2 IUC response message examples, the IUC response message may also include bit(s) indicating whether the IUC response message is providing an indication of the (non-)preferred resources or requesting an indication of the (non-) preferred resources. The SCI 2 IUC response message may also indicate the resource combination(s). For example, the SCI 2 IUC response message may indicate:

The IUC response message may include a first resource location field and a reference slot location field. The first resource location (e.g., in the time domain) may use bit(s) to signal the starting slot (e.g., the reference slot). The reference slot location may indicate (10+┌log2(10*2u)┐), where u is 0, 1, 2, or 3, for SCS of 15 kHz, 30 kHz, 60 kHz, or 120 kHz, respectively. The IUC request message may include a resource set type that uses bit(s) to indicate whether the IUC request is for preferred resources or for non-preferred resources (e.g., when the parameter determineResourceSetTypeScheme1 is set to “UE-B's request.” Otherwise, no bits may be allocated to the resource set type field. The IUC response message may include a lowest subchannel indices for the first resource location of each TRIV. For example, the field may indicate 2*┌log2(NsubchannelSL)┐, where NsubchannelSLis provided by the higher layer parameter sl-NumSubChannel. In some examples, the lowest subchannel index for the first resource location of each TRIV may be separately indicated in the IUC response message. In some examples, the IUC response message may include an actual number of resource combinations field. In the IUC response message, the field size of the indication of the resource combination(s) using the SCI 2 format may be determined based on N=2. The indication of

may be for a FRIV, the indication of “9” or some other value may be for a TRIV, and the indication of Y may be for the RRI. The indication of the first resource location of each TRIV may be an indication of a slot offset with respect to a reference slot.

In the MAC-CE signaling example, the IUC response message carried in the MAC-CE may include similar fields to the SCI 2 format. However, the number of resources being indicated using the MAC-CE signaling may be more than 2 (e.g., N does not have to equal 2). The MAC-CE IUC response message may include the providing/requesting indicator field. The MAC-CE IUC response message may indicate the resource combination field. For example, the resource combination field may indicate

The MAC-CE IUC response message may include a first resource location field and a reference slot location field. The first resource location (e.g., in the time domain) may use bit(s) to (N−1) ┌log2X┐, where X is provided by the (pre)configured maximum value of slot offset for the case when MAC-CE only is used as the container for the IUC response message. The reference slot location may indicate (10+┌log2(10*2u)┐), where u is 0, 1, 2, or 3, for SCS of 15 kHz, 30 kHz, 60 kHz, or 120 kHz, respectively. The MAC-CE IUC request message may include a resource set type that uses bit(s) to indicate whether the IUC request is for preferred resources or for non-preferred resources. The MAC-CE IUC response message may include a lowest subchannel indices for the first resource location of each TRIV. For example, the field may indicate N*┌log2(NsubchannelSL)┐, where NsubchannelSLis provided by the higher layer parameter sl-NumSubChannel. In some examples, the maximum value of N resource combinations being conveyed in the IUC information may be bounded so that the total payload size of IUC response message does not result in an excessive size of the transport block (TB) carrying the MAC-CE. For a slot offset that is (pre)configured to indicate the first resource location of each TRIV with respect to a reference slot, the granularity of the slot offset may be 1 logical slot, the (pre)configured maximum value of the slot offset may be up to 8000, and when both SCI 2 and MAC-CE are used as the container for the IUC response, the maximum value of the slot offset may be 255. When MAC-CE is used as the only container carrying the IUC information, the maximum value of the slot offset may be the (pre)configured maximum value.

In some examples, an SCI may be used to schedule multiple transmission time interval (TTI) (e.g., an SCI may be used to schedule multiple physical sidelink control channel (PSCCH) and/or physical sidelink shared channel (PSSCH) transmissions to conserve control signaling. For example, an embedded SCI in PSSCH (Alternative 1) and a decoupled SCI pool (Alternative 2) may be considered. Alternative 2 may be preferred for frequency range two (FR2) as one SCI can include quasi-colocation (QCL) information in the SCI and allow the receiver to apply appropriate QCL for PSSCH decoding. An SCI 1 may reserve up to 2 future bursts of slots for a multi-TB retransmission. A new time resource allocation field (K0 and the # of contiguous slots) may be applied. The number of contiguous slots for retransmission could be the same as used in the first transmission, or may be separately RRC configured. The time domain resource allocation (TDRA) or frequency domain resource allocation (FDRA) indications may reserve future slot/mini-slot bursts for PSSCH retransmission. Additionally, the TDRA or FDRA fields may reserve control mini-slots for future re-scheduling SCIs for decouple the control pool. Additionally, the SCI 1 may contain common FDRA and MCS fields for all of the PSSCH slots, a beta offset for the SCI 2, and a reserved transmit beam index and transmitters identifier if beam reservation is supported. The SCI 2 scheduling burst communications generally carries a HARQ identifier and service area identifier (SAI) for the first scheduled PSSCH slot and the values are virtual for the following PSSCH slots. A single K1 and PRI for the HARQ feedback, a source/destination identifier, a new data indicator (NDI) and redundancy version (RV) for each scheduled PSSCH slot, and a transmission configuration indicator (TCI) state for all of the schedules PSSCH slots (Alt 2) may be indicated in the SCI 2 scheduling multiple TBs.

In some examples, the communications may be performed over an unlicensed or shared radio frequency band. In unlicensed cellular communications, PUSCH resource allocations for NR-U may use an (X,Y) to indicate the resource allocation. X may indicate which interlaces are being allocated and Y may indicate which RB sets are being allocated. For the X indication in a 30 kHz SCS case, arbitrary interlace combinations may be supported using a five-bit bitmap. For the 15 kHz SCS case, consecutive interlace allocations may be supported, with some (regular) sets of interlace allocation being supported with MV. For the Y indication, consecutive RBs are supported for allocation. For a standalone SL-U deployment, the SL nodes may not use the same point A (e.g., frequency grid) and the absolute interlace index definition could be different. In some examples, the FDRA may be used in the form of a relative allocation starting from the current subchannel where the FDRA indicates how many subchannel(s) is allocated.

However, such techniques limit utilization of the IUC procedures. For example, a transmitter may prefer to clear the listen-before-talk (LBT) procedure and transmit in certain RB set(s) as there is less interference in a 20 MHz channel (e.g., WiFi interference) and the receiving node may not know the interference around transmitter. Accordingly, the transmitter may want to send the recommended RB set to assist the receiver to pick the preferred resources. However, conventional techniques only support the IUC information (e.g., carried in the IUC request message and/or in the IUC response message) only can signal up to N TRIV's (N up to 3) with (N−1) first resource locations which indicates the offset from the reference slot to the first resource indicated in the TRIV. The first TRIV is with respect to the reference slot, and the second or third TRIV is with respect to the indicated first resource locations (which is with respect to the reference slot). Each TRIV could signal up to three slots within the 32 slots from the reference point. For sidelink-U operations, the sidelink nodes may choose or reserve multiple contiguous slots to deal with LBT uncertainty or bursty traffic, and the TRIV, FRIV, or both, signaling according to such conventional techniques do not support such resource signaling in IUC exchanges. As one example for the FRIV indicated in the IUC information, the signaling needs to indicate RB-set and interlace information, such as to support sidelink-U.

Accordingly, aspects of the techniques discussed herein provide for relative (X, Y) indications in the IUC exchanges (such as for supporting sidelink-U PSSCH). The relative X (bitmap or RIV) with respect to the scheduling SCI 1 interlace may be supported. The X bitmap may indicate which interlaces are allocated, with wrap around (e.g., repetition of the indicated interlaces). The Relative Y may be with respect to the SCI 1 reception RB set (e.g., may indicate the number of occupied RB set starting from the SCI 1 reception RB set). The described improved signaling techniques may be applicable to the IUC request message, to the IUC response message, or to both messages.

For example, UE210may transmit or otherwise provide (and UE205may receive or otherwise obtain) an IUC request message. In some aspects, the IUC request message may indicate the priority value, number of subchannels, time interval between periodic transmissions, resource selection window, and the like. For example, the IUC request message may include a prioTx field (priority value) indicating the priority of the second UE's intended transmission, a LsubcH field (logical number of subchannels) indicating the second UE's intended transmission, and P rsvp Tx field (reservation period of the time interval between the second UE's periodic transmissions) of the second UE's intended transmission. The starting/ending times of the resource selection window may be based on the packet delay budget (PDB) of the second UE's transmissions. The starting/ending times of resource selection window (RSW) may be a form of a combination of dual frequency network (DFN) index and slot index. If the first UE is the intended receiver, UE205may provide the preferred resource based on the modified resource selection or non-preferred resources which have high amount of interference in the IUC response message.

In sidelink unlicensed, the second UE may prefer a certain RB-set (e.g., in a 20 MHz channel) in which it may clear the LBT more easily (e.g., identify a suspected clean channel). Accordingly, the second UE may determine if the first UE is to provide an indication of the preferred set in the preferred RB-set(s) in the IUC response message. The second UE may want the first UE to provide a burst of preferred slots to carry multiple TBs (e.g., for eMBB traffic) or address LBT uncertainty. Accordingly, the second UE may want to recommend the number of slots in the preferred bursts.

Accordingly, in some examples the IUC request message may carry or otherwise convey, in addition to or in lieu of the information discussed above, a requested RB set and interlacing pattern frequency configuration and a starting slot and slot burst length configuration for the multi-slot burst communications between UE205and UE210. For example, the IUC request message requesting the resource scheduling information for the (non-)preferred resources may include an indication of the recommended RB-sets as well as the number of slots in the bursts of preferred slots. The second UE may suggest to the first UE the recommended RB-set(s) in the IUC request message so that the second UE can make resource selection (scheduling decisions) within the recommended RB-set. In the sidelink unlicensed two-part FDRA (X,Y) indication, Y may be used to indicate the starting RB-set and the number of continuous RB-set(s) and X may be used to indicate which interlace(s) are allocated.

Broadly, the requested RB set and interlacing pattern frequency in the IUC request message may include an indication of the starting RB set and an indication of the number of continuous RB set(s) or a bitmap using each bit to indicate the starting RB set and continuous or discontinuous RB set(s). That is, different options may be employed to indicate the recommended RB-set(s) in the IUC request message. One option may include the IUC request message including an indication of the starting RB set and number of continuous RB set(s) (e.g., reusing the Y encoding techniques). Another option may include the IUC request message including a bitmap of the recommended RB set(s). That is, each bit in the bitmap may correspond to a unique RB set and the bits of the bitmap may be set or otherwise configured to indicate whether the corresponding RB set is allocated. This may enable signaling of discontinuous RB sets, as well as the starting RB set (e.g., the RB set having the lowest index) in the IUC request (e.g., the requested RB set and interlacing frequency configuration and requested starting slot and slot burst length configuration). The number of bits included in the bitmap may be based on the number of potential RB set(s) that can be allocated for communications. Again, if the second UE is aware of the number of slots needed (e.g., for eMBB traffic and/or to clear an LBT procedure), the IUC request message can signal the recommended number of slots in the bursts of preferred slots. The first UE can then make resource selection based on the recommendation and return the preferred burst resources having the desired length in the IUC response message. This may signal the interlacing pattern to be used during the burst resources.

Accordingly, to address LBT uncertainty or burst traffic, the second UE may indicate the burst of slots for the initial transmission and retransmission(s) in the IUC request message, as well as the starting slot and slot burst length (e.g., the number of slots included for the multi-slot burst communications). Accordingly, in some examples the RB set and interlacing pattern frequency configuration indicated in the IUC response message may be based on the requested RB set and interlacing pattern frequency configuration. Similarly, the starting slot and slot burst length configuration indicated in the IUC response message may be based on the requested starting slot and slot burst length indicated in the IUC request message.

UE205may respond to the IUC request message by transmitting an IUC response message to UE210. As discussed, the IUC response message may carry additional information for resources supporting multi-slot burst communications. In some aspects, the resource information indicated in the IUC response message may be based, at least to some degree, on the resource information indicated in the IUC request message. Accordingly, the IUC response message may carry or otherwise convey an indication of the starting slot and slot burst length (e.g., a TRIV identifying the starting slot and number of slots included for multi-slot burst communications). That is, the IUC response message may support identifying resource scheduling information supporting bursts of communications in (non-)preferred slots. In some aspects, this may include using the TRIV for each (non-)preferred resource combination as well as including additional length field(s) to indicate the length of the slot burst after the TRIV indicated slots.

In some examples, the indication of the number of slots included for multi-slot burst communications may include a shared indication of the number of slots that are included in each instance of the multi-slot burst communications. For example, the same slot burst length may be used for each instance of the multi-slot burst communications. This may use a common burst duration field in the IUC response message for the (non-)preferred resources.

In some examples, the indication of the number of slots included for multi-slot burst communications may include a first indication of the number of slots that are included in a first instance of the multi-slot burst communications and a second indication of the number of slots that are included in additional instance(s) of the multi-slot burst communications. For example, a different number of contiguous slots may be signaled in the IUC response message for the (non-)preferred resources. The different burst duration fields may be used for the initial (e.g., first) instance and for the subsequent instance(s) of the multi-slot burst communications.

In some examples, the indication of the number of slots included for multi-slot burst communications may include a separate indication of the number of slots that are included for each instance of the multi-slot burst communications. That is, each TRIV indicated slot may be signaled with its own indication of the number of contiguous slots for each instance of the multi-slot burst communications. In some examples, the field lengths uses for each signaled TRIV indicated slot may be the same or different. That is, one alternative may be to share the common length field(s) among each indicated instance or to use different field lengths for the slot burst(s) (e.g., each instance has its own slot burst length field size).

In some examples, wireless communications system200may support overbooking on the reserved channel occupancy time (COT) (e.g., the time in which the channel is reserved after a successful LBT procedure). Accordingly, the IUC exchange may support resource selection and reservation using different starting positions. Even when some resources are reserved, the first UE may want to indicate the preferred resources having a shorter common phase error (CPE) or a later starting position when overlapping with reserved COT resources.

Accordingly, in some examples the IUC response message may indicate an earliest starting slot for the multi-slot burst communications. For example, the IUC response message may carry or otherwise convey an indication of a starting position for the (non-)preferred resources. For example, the first UE (e.g., UE205) may indicate the earliest start position based on its resource selection. If the first UE identifies a reservation having a certain starting position within the set of starting positions associated with a given priority, then the first UE may pick the later starting position within the set (such as the one right after the reserved starting position). The second UE may select a starting position no earlier than the one indicated in the preferred resource (e.g., in the IUC response message). This may enable the second UE to yield to the first UE which reserves earlier starting position (sensed by the first UE) in the IUC response message.

If the second UE determines that earlier starting positions within the set of starting positions associated with a given priority are not available for a preferred resource, the resource may be overloaded. The second UE may attempt to pick a resource from the preferred resources having less overloading.

Accordingly, the resource combination field in the IUC response message may contain N FRIVs for N (non-)preferred resource sets. To support the frequency resource allocation in terms of RB sets and interlaces (e.g., in sidelink unlicensed), the FRIV fields of the IUC response message may also be enhanced. In some aspects, this may include using the two-part FDRA (X,Y) for the FRIV indication and including the reference RB set and interlace in the IUC response message. The IUC response message may carry or otherwise convey an indication of the starting RB set (e.g., in addition to or instead of the starting subchannel indication) and the starting interlace for the first resource in the FDRA. That is, the IUC response message may carry or otherwise convey an indication of the RB set and interlacing pattern frequency configuration that includes the starting RB set with the number of RB set(s) (e.g., contiguous or non-contiguous) and an interlacing pattern for the starting RB set and number of RB set(s).

For the Y part (RB set), there may be K RB set(s) in the resource pool. In the non-limiting example where continuous RB set(s) are allocated, UE205may jointly encode the starting RB set and number of RB set(s) with up to three (N) resources. This may include using

bits for N=3.

For the X part (interlace), joint encoding of the initial assignment and future reservation offsets are possible (e.g., when indicating continuous slots). For N=Y+1 (Y future reservations), there may be M total interlaces (e.g., if L interlaces are allocated), the IUC response message may indicate signal (M−L)Yoffsets. The FDRA indicated in the IUC response message may contain

bits for N=2 or using

bits for N=3. To use a relative bitmap to indicate non-contiguous interlaces (assuming M total interlaces), assume Y future reservations may take the same interlace pattern but with different relative interlace offsets, then the resulting indication may use an M bit bitmap for the first resource and ┌log 2(M)┐ additional bits for 1 future reservation and ┌log2M┐ additional bits for two future reservations.

Accordingly, the IUC request message and IUC response message may carry or otherwise convey an indication of time and/or frequency resources suited for multi-slot burst communications between UE205and UE210.

FIG.3illustrates an example of a resource configuration300that supports IUC for sidelink in an unlicensed or shared spectrum in accordance with one or more aspects of the present disclosure. Resource configuration300may implement aspects of wireless communications systems100and/or200. Aspects of resource configuration300may be implemented at or by a UE, which may an example of the corresponding device described herein.

As discussed above, aspects of the techniques described herein provide for improved IUC exchanges between UE. The improvements generally support the IUC request message, the IUC response message, or both, indicating frequency and time resources at the RB set level, identifying timing (e.g., offset, delay, repetition) parameters for multi-slot burst communications between the UE, and the like. Resource configuration300illustrates a non-limiting example of the resources configured (e.g., indicated in the IUC request or response messages, or resources scheduled in response to the IUC messages.

For example, a first UE may transmit or otherwise provide a IUC response message to a second UE. The IUC response message may be triggered by the occurrence of an event or condition or may be triggered by an IUC request message received from the second UE. The IUC response message may carry or otherwise convey scheduling information. The scheduling information may include an RB set and interlacing pattern frequency, a starting slot and slot burst length, or both, for the multi-slot burst communications. In some examples, the IUC request message may indicate a requested RB set and interlacing pattern frequency configuration, a requested starting slot and slot burst length, or both, for the multi-slot burst communications.

Resource configuration300illustrates an example of resource scheduling for multi-slot burst communications that may be signaled or otherwise based on the IUC message exchange. For example, the IUC response message may indicate a first resource combination305and a second resource combination310. Each resource combination may identify a set of slots, starting at reference slot315, that may be used for a first set of multi-slot burst communications using the first resource combination305. The first set of slots, beginning at reference slot315, may include three slots, by way of example only, that may be scheduled by a first TRIV and FRIV indication. For example, the first TRIV indicated in the IUC response message may identify the first three slots (the slot burst length is three slots) as the first instance of multi-slot burst communications. The first three slots may be signaled in the IUC response message using the improved TRIV indications discussed above (e.g., starting slot and slot burst length in the time domain, or both), the improved FRIV indications discussed above (e.g., starting RB and number of RB set(s) in the frequency domain, such as using the (X,Y) indication features), or both. The X portion of the FRIV indication may be used to indicate the interlace for the resource combination (e.g., the interlace pattern frequency configuration).

The second resource combination310may be indicated relative to reference slot315using a slot offset320. Like first resource combination305, the second resource combination310may be indicated using a second TRIV or FRIV field in the IUC response message. The second TRIV or FRIV field may be an absolute TRIV or FRIV indication may be signaled relative to first resource combination305(e.g., relative to reference slot315).

FIG.4illustrates an example of a resource configuration400that supports IUC for sidelink in an unlicensed or shared spectrum in accordance with one or more aspects of the present disclosure. Resource configuration400may implement aspects of wireless communications systems100and/or200, or aspects of resource configuration300. Aspects of resource configuration400may be implemented at or by a UE, which may an example of the corresponding device described herein.

As discussed above, aspects of the techniques described herein provide for improved IUC exchanges between UE. The improvements generally support the IUC request message, the IUC response message, or both, indicating frequency and time resources at the RB set level, identifying timing (e.g., offset, delay, repetition, or interlace) parameters for multi-slot burst communications between the UE, and the like.

For example, a first UE may transmit or otherwise provide a IUC response message to a second UE. The IUC response message may be triggered by the occurrence of an event or condition or may be triggered by an IUC request message received from the second UE. The IUC response message may carry or otherwise convey scheduling information. The scheduling information may include an RB set and interlacing pattern frequency, a starting slot and slot burst length, or both, for the multi-slot burst communications. In some examples, the IUC request message may indicate a requested RB set and interlacing pattern frequency configuration, a requested starting slot and slot burst length, or both, for the multi-slot burst communications.

Resource configuration400illustrates an example of resource scheduling for multi-slot burst communications that may be signaled or otherwise based on the IUC message exchange. For example, the IUC response message may indicate resources with a shorter CPR or later starting position when overlapping with reserved COT resources. Resource configuration400illustrates an example where the indication of the TRIV indicates an earliest starting slot for the multi-slot burst communications.

For example, a sensing window405may be defined during which the UE may monitor for one or more channels for channel measurement and performance procedures. Accordingly, during sensing window405the UE may identify or otherwise determine which channels are best suited for communications. After a resource selection has been triggered, the UE may have a time period T1during which the UE selects the resources to be used from a resource selection window. The UE may select a resource having a starting position at T1>T0. Accordingly, the IUC response message may indicate the earliest starting slot, which may improve resource selection of (non-) preferred resources410by the UE.

The communications manager520, the receiver510, the transmitter515, or various combinations thereof or various components thereof may be examples of means for performing various aspects of IUC for sidelink in an unlicensed or shared spectrum as described herein. For example, the communications manager520, the receiver510, the transmitter515, or various combinations or components thereof may support a method for performing one or more of the functions described herein.

In some examples, the communications manager520may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver510, the transmitter515, or both. For example, the communications manager520may receive information from the receiver510, send information to the transmitter515, or be integrated in combination with the receiver510, the transmitter515, or both to obtain information, output information, or perform various other operations as described herein.

The communications manager520may support wireless communication at a first UE in accordance with examples as disclosed herein. For example, the communications manager520may be configured as or otherwise support a means for receiving an IUC request message from a second UE, the IUC request message identifying a request for resource scheduling information for the first UE, the second UE, or both. The communications manager520may be configured as or otherwise support a means for transmitting an IUC response message including the scheduling information to the second UE, the scheduling information including an indication of one or more of a resource block set and interlacing pattern frequency configuration for multi-slot burst communications between the first UE and the second UE or a starting slot and slot burst length configuration for the multi-slot burst communications between the first UE and the second UE.

Additionally, or alternatively, the communications manager520may support wireless communication at a second UE in accordance with examples as disclosed herein. For example, the communications manager520may be configured as or otherwise support a means for transmitting an IUC request message from a first UE, the IUC request message identifying a request for resource scheduling information for the first UE, the second UE, or both. The communications manager520may be configured as or otherwise support a means for receiving an IUC response message including the scheduling information from the first UE, the scheduling information including an indication of one or more of a resource block set and interlacing pattern frequency configuration for multi-slot burst communications between the first UE and the second UE or a starting slot and slot burst length configuration for the multi-slot burst communications between the first UE and the second UE.

By including or configuring the communications manager520in accordance with examples as described herein, the device505(e.g., a processor controlling or otherwise coupled with the receiver510, the transmitter515, the communications manager520, or a combination thereof) may support techniques for improved IUC message content to support RB level resource signaling, starting slot and slot burst length indications, and other improvements to schedule multi-slot burst communications.

The device605, or various components thereof, may be an example of means for performing various aspects of IUC for sidelink in an unlicensed or shared spectrum as described herein. For example, the communications manager620may include an IUC request manager625an IUC response manager630, or any combination thereof. The communications manager620may be an example of aspects of a communications manager520as described herein. In some examples, the communications manager620, or various components thereof, may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver610, the transmitter615, or both. For example, the communications manager620may receive information from the receiver610, send information to the transmitter615, or be integrated in combination with the receiver610, the transmitter615, or both to obtain information, output information, or perform various other operations as described herein.

The communications manager620may support wireless communication at a first UE in accordance with examples as disclosed herein. The IUC request manager625may be configured as or otherwise support a means for receiving an IUC request message from a second UE, the IUC request message identifying a request for resource scheduling information for the first UE, the second UE, or both. The IUC response manager630may be configured as or otherwise support a means for transmitting an IUC response message including the scheduling information to the second UE, the scheduling information including an indication of one or more of a resource block set and interlacing pattern frequency configuration for multi-slot burst communications between the first UE and the second UE or a starting slot and slot burst length configuration for the multi-slot burst communications between the first UE and the second UE.

Additionally, or alternatively, the communications manager620may support wireless communication at a second UE in accordance with examples as disclosed herein. The IUC request manager625may be configured as or otherwise support a means for transmitting an IUC request message from a first UE, the IUC request message identifying a request for resource scheduling information for the first UE, the second UE, or both. The IUC response manager630may be configured as or otherwise support a means for receiving an IUC response message including the scheduling information from the first UE, the scheduling information including an indication of one or more of a resource block set and interlacing pattern frequency configuration for multi-slot burst communications between the first UE and the second UE or a starting slot and slot burst length configuration for the multi-slot burst communications between the first UE and the second UE.

FIG.7shows a block diagram700of a communications manager720that supports IUC for sidelink in an unlicensed or shared spectrum in accordance with one or more aspects of the present disclosure. The communications manager720may be an example of aspects of a communications manager520, a communications manager620, or both, as described herein. The communications manager720, or various components thereof, may be an example of means for performing various aspects of IUC for sidelink in an unlicensed or shared spectrum as described herein. For example, the communications manager720may include an IUC request manager725, an IUC response manager730, an IUC request frequency manager735, an IUC timing manager740, an IUC response frequency manager745, or any combination thereof. Each of these components may communicate, directly or indirectly, with one another (e.g., via one or more buses).

The communications manager720may support wireless communication at a first UE in accordance with examples as disclosed herein. The IUC request manager725may be configured as or otherwise support a means for receiving an IUC request message from a second UE, the IUC request message identifying a request for resource scheduling information for the first UE, the second UE, or both. The IUC response manager730may be configured as or otherwise support a means for transmitting an IUC response message including the scheduling information to the second UE, the scheduling information including an indication of one or more of a resource block set and interlacing pattern frequency configuration for multi-slot burst communications between the first UE and the second UE or a starting slot and slot burst length configuration for the multi-slot burst communications between the first UE and the second UE.

In some examples, the IUC request frequency manager735may be configured as or otherwise support a means for identifying, based on the IUC request message, a first resource block set and interlacing pattern frequency configuration and a first starting slot and slot burst length configuration for the multi-slot burst communications between the first UE and the second UE, where the indicated resource block set and interlacing pattern frequency configuration is based on the first resource block set and interlacing pattern frequency configuration and the indicated starting slot and the slot burst length configuration is based on the first starting slot and slot burst length configuration.

In some examples, the first resource block set and interlacing pattern frequency configuration include a field indicating the starting resource block set and number of continuous resource block sets or a bitmap where each bit in the bitmap is configured to indicate the starting resource block set and continuous or discontinuous resource block sets. In some examples, the first resource block set and interlacing pattern frequency configuration includes a starting resource block set with a number of continuous or discontinuous resource block sets and an interlacing pattern for the starting resource block set and continuous or discontinuous resource block sets. In some examples, the first starting slot and slot burst length configuration includes a timing resource indication value identifying the starting slot and a number of slots included for multi-slot burst communications between the first UE and the second UE.

In some examples, to support transmitting the IUC response message, the IUC timing manager740may be configured as or otherwise support a means for transmitting, in the IUC response message, the indication of the starting slot and slot burst length configuration that includes a timing resource indication value identifying the starting slot and a number of slots included for multi-slot burst communications between the first UE and the second UE.

In some examples, the indication of the number of slots included for multi-slot burst communications includes a shared indication of the number of slots that are included in each instance of the multi-slot burst communications, a first indication of the number of slots that are included in a first instance of the multi-slot burst communications and a second indication of the number of slots that are included in one or more additional instances of the multi-slot burst communications, or a separate indication of the number of slots that are included for each instance of the multi-slot burst communications. In some examples, the indication of the number of slots included for the multi-slot burst communication includes one or more fields indicating the number of slots included for the multi-slot burst communications, where each field of the one or more fields has a shared field length or a different field length. In some examples, the indication of the timing resource indication value includes an earliest starting slot for the multi-slot burst communications.

In some examples, to support transmitting the IUC response message, the IUC response frequency manager745may be configured as or otherwise support a means for transmitting, in the IUC response message, the indication of the resource block set and interlacing pattern frequency configuration that includes a starting resource block set with a number of continuous or discontinuous resource block sets and an interlacing pattern for the starting resource block set and continuous or discontinuous resource block sets.

In some examples, the indication of the interlacing pattern includes an interlacing pattern for a starting interlacing pattern for a first instance of the multi-slot burst communications and a shared offset value identifying the offset between each instance of the multi-slot burst communications. In some examples, the indication of the interlacing pattern includes a bitmap where each bit in the bitmap is configured to identify a starting interlacing pattern for a first instance of the multi-slot burst communications and a separate offset value for each subsequent instance of the multi-slot burst communications identifying the offset between each instance.

Additionally, or alternatively, the communications manager720may support wireless communication at a second UE in accordance with examples as disclosed herein. In some examples, the IUC request manager725may be configured as or otherwise support a means for transmitting an IUC request message from a first UE, the IUC request message identifying a request for resource scheduling information for the first UE, the second UE, or both. In some examples, the IUC response manager730may be configured as or otherwise support a means for receiving an IUC response message including the scheduling information from the first UE, the scheduling information including an indication of one or more of a resource block set and interlacing pattern frequency configuration for multi-slot burst communications between the first UE and the second UE or a starting slot and slot burst length configuration for the multi-slot burst communications between the first UE and the second UE.

In some examples, the IUC request frequency manager735may be configured as or otherwise support a means for identifying, based on the IUC request message, a first resource block set and interlacing pattern frequency configuration and a first starting slot and slot burst length configuration for the multi-slot burst communications between the first UE and the second UE, where the indicated resource block set and interlacing pattern frequency configuration is based on the first resource block set and interlacing pattern frequency configuration and the indicated starting slot and the slot burst length configuration is based on the first starting slot and slot burst length configuration.

In some examples, the first resource block set and interlacing pattern frequency configuration include a field indicating the starting resource block set and number of continuous resource block sets or a bitmap where each bit in the bitmap is configured to indicate the starting resource block set and continuous or discontinuous resource block sets. In some examples, the first resource block set and interlacing pattern frequency configuration includes a starting resource block set with a number of continuous or discontinuous resource block sets and an interlacing pattern for the starting resource block set and continuous or discontinuous resource block sets. In some examples, the first starting slot and slot burst length configuration includes a timing resource indication value identifying the starting slot and a number of slots included for multi-slot burst communications between the first UE and the second UE.

In some examples, the IUC timing manager740may be configured as or otherwise support a means for identifying, based on the IUC response message, the indication of the starting slot and slot burst length configuration that includes a timing resource indication value identifying the starting slot and a number of slots included for multi-slot burst communications between the first UE and the second UE.

In some examples, the indication of the number of slots included for multi-slot burst communications includes a shared indication of the number of slots that are included in each instance of the multi-slot burst communications, a first indication of the number of slots that are included in a first instance of the multi-slot burst communications and a second indication of the number of slots that are included in one or more additional instances of the multi-slot burst communications, or a separate indication of the number of slots that are included for each instance of the multi-slot burst communications.

In some examples, the indication of the number of slots included for the multi-slot burst communication includes one or more fields indicating the number of slots included for the multi-slot burst communications, where each field of the one or more fields has a shared field length or a different field length. In some examples, the indication of the timing resource indication value includes an earliest starting slot for the multi-slot burst communications.

In some examples, the IUC response frequency manager745may be configured as or otherwise support a means for identifying, based at least in part on the IUC response message, the indication of the resource block set and interlacing pattern frequency configuration that includes a starting resource block set with a number of continuous or discontinuous resource block sets and an interlacing pattern for the starting resource block set and continuous or discontinuous resource block sets.

In some examples, the indication of the interlacing pattern includes an interlacing pattern for a starting interlacing pattern for a first instance of the multi-slot burst communications and a shared offset value identifying the offset between each instance of the multi-slot burst communications. In some examples, the indication of the interlacing pattern includes a bitmap where each bit in the bitmap is configured to identify a starting interlacing pattern for a first instance of the multi-slot burst communications and a separate offset value for each subsequent instance of the multi-slot burst communications identifying the offset between each instance.

The communications manager820may support wireless communication at a first UE in accordance with examples as disclosed herein. For example, the communications manager820may be configured as or otherwise support a means for receiving an IUC request message from a second UE, the IUC request message identifying a request for resource scheduling information for the first UE, the second UE, or both. The communications manager820may be configured as or otherwise support a means for transmitting an IUC response message including the scheduling information to the second UE, the scheduling information including an indication of one or more of a resource block set and interlacing pattern frequency configuration for multi-slot burst communications between the first UE and the second UE or a starting slot and slot burst length configuration for the multi-slot burst communications between the first UE and the second UE.

Additionally, or alternatively, the communications manager820may support wireless communication at a second UE in accordance with examples as disclosed herein. For example, the communications manager820may be configured as or otherwise support a means for transmitting an IUC request message from a first UE, the IUC request message identifying a request for resource scheduling information for the first UE, the second UE, or both. The communications manager820may be configured as or otherwise support a means for receiving an IUC response message including the scheduling information from the first UE, the scheduling information including an indication of one or more of a resource block set and interlacing pattern frequency configuration for multi-slot burst communications between the first UE and the second UE or a starting slot and slot burst length configuration for the multi-slot burst communications between the first UE and the second UE.

By including or configuring the communications manager820in accordance with examples as described herein, the device805may support techniques for improved IUC message content to support RB level resource signaling, starting slot and slot burst length indications, and other improvements to schedule multi-slot burst communications.

At905, the method may include receiving an IUC request message from a second UE, the IUC request message identifying a request for resource scheduling information for the first UE, the second UE, or both. The operations of905may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of905may be performed by an IUC request manager725as described with reference toFIG.7.

At910, the method may include transmitting an IUC response message including the scheduling information to the second UE, the scheduling information including an indication of one or more of a resource block set and interlacing pattern frequency configuration for multi-slot burst communications between the first UE and the second UE or a starting slot and slot burst length configuration for the multi-slot burst communications between the first UE and the second UE. The operations of910may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of910may be performed by an IUC response manager730as described with reference toFIG.7.

At1005, the method may include receiving an IUC request message from a second UE, the IUC request message identifying a request for resource scheduling information for the first UE, the second UE, or both. The operations of1005may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1005may be performed by an IUC request manager725as described with reference toFIG.7.

At1010, the method may include identifying, based on the IUC request message, a first resource block set and interlacing pattern frequency configuration and a first starting slot and slot burst length configuration for the multi-slot burst communications between the first UE and the second UE, where the indicated resource block set and interlacing pattern frequency configuration is based on the first resource block set and interlacing pattern frequency configuration and the indicated starting slot and the slot burst length configuration is based on the first starting slot and slot burst length configuration. The operations of1010may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1010may be performed by an IUC request frequency manager735as described with reference toFIG.7.

At1015, the method may include transmitting an IUC response message including the scheduling information to the second UE, the scheduling information including an indication of one or more of a resource block set and interlacing pattern frequency configuration for multi-slot burst communications between the first UE and the second UE or a starting slot and slot burst length configuration for the multi-slot burst communications between the first UE and the second UE. The operations of1015may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1015may be performed by an IUC response manager730as described with reference toFIG.7.

At1105, the method may include transmitting an IUC request message from a first UE, the IUC request message identifying a request for resource scheduling information for the first UE, the second UE, or both. The operations of1105may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1105may be performed by an IUC request manager725as described with reference toFIG.7.

At1110, the method may include receiving an IUC response message including the scheduling information from the first UE, the scheduling information including an indication of one or more of a resource block set and interlacing pattern frequency configuration for multi-slot burst communications between the first UE and the second UE or a starting slot and slot burst length configuration for the multi-slot burst communications between the first UE and the second UE. The operations of1110may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1110may be performed by an IUC response manager730as described with reference toFIG.7.

At1205, the method may include transmitting an IUC request message from a first UE, the IUC request message identifying a request for resource scheduling information for the first UE, the second UE, or both. The operations of1205may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1205may be performed by an IUC request manager725as described with reference toFIG.7.

At1210, the method may include receiving an IUC response message including the scheduling information from the first UE, the scheduling information including an indication of one or more of a resource block set and interlacing pattern frequency configuration for multi-slot burst communications between the first UE and the second UE or a starting slot and slot burst length configuration for the multi-slot burst communications between the first UE and the second UE. The operations of1210may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1210may be performed by an IUC response manager730as described with reference toFIG.7.

At1215, the method may include identifying, based on the IUC response message, the indication of the starting slot and slot burst length configuration that includes a timing resource indication value identifying the starting slot and a number of slots included for multi-slot burst communications between the first UE and the second UE. The operations of1215may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1215may be performed by an IUC timing manager740as described with reference toFIG.7.

The following provides an overview of aspects of the present disclosure:Aspect 1: A method for wireless communication at a first UE, comprising: receiving an IUC request message from a second UE, the IUC request message identifying a request for resource scheduling information for the first UE, the second UE, or both; and transmitting an IUC response message comprising the scheduling information to the second UE, the scheduling information comprising an indication of one or more of a RB set and interlacing pattern frequency configuration for multi-slot burst communications between the first UE and the second UE or a starting slot and slot burst length configuration for the multi-slot burst communications between the first UE and the second UE.Aspect 2: The method of aspect 1, further comprising: identifying, based at least in part on the IUC request message, a first RB set and interlacing pattern frequency configuration and a first starting slot and slot burst length configuration for the multi-slot burst communications between the first UE and the second UE, wherein the indicated RB set and interlacing pattern frequency configuration is based at least in part on the first RB set and interlacing pattern frequency configuration and the indicated starting slot and the slot burst length configuration is based at least in part on the first starting slot and slot burst length configuration.Aspect 3: The method of aspect 2, wherein the first RB set and interlacing pattern frequency configuration comprise a field indicating the starting RB set and number of continuous RB sets or a bitmap where each bit in the bitmap is configured to indicate the starting RB set and continuous or discontinuous RB sets.Aspect 4: The method of any of aspects 2 through 3, wherein the first RB set and interlacing pattern frequency configuration comprises a starting RB set with a number of continuous or discontinuous RB sets and an interlacing pattern for the starting RB set and continuous or discontinuous RB sets.Aspect 5: The method of any of aspects 2 through 4, wherein the first starting slot and slot burst length configuration comprises a timing resource indication value identifying the starting slot and a number of slots included for multi-slot burst communications between the first UE and the second UE.Aspect 6: The method of any of aspects 1 through 5, wherein transmitting the IUC response message comprises: transmitting, in the IUC response message, the indication of the starting slot and slot burst length configuration that comprises a timing resource indication value identifying the starting slot and a number of slots included for multi-slot burst communications between the first UE and the second UE.Aspect 7: The method of aspect 6, wherein the indication of the number of slots included for multi-slot burst communications comprises a shared indication of the number of slots that are included in each instance of the multi-slot burst communications, a first indication of the number of slots that are included in a first instance of the multi-slot burst communications and a second indication of the number of slots that are included in one or more additional instances of the multi-slot burst communications, or a separate indication of the number of slots that are included for each instance of the multi-slot burst communications.Aspect 8: The method of any of aspects 6 through 7, wherein the indication of the number of slots included for the multi-slot burst communication comprises one or more fields indicating the number of slots included for the multi-slot burst communications, where each field of the one or more fields has a shared field length or a different field length.Aspect 9: The method of any of aspects 6 through 8, wherein the indication of the timing resource indication value comprises an earliest starting slot for the multi-slot burst communications.Aspect 10: The method of any of aspects 1 through 9, wherein transmitting the IUC response message comprises: transmitting, in the IUC response message, the indication of the RB set and interlacing pattern frequency configuration that comprises a starting RB set with a number of continuous or discontinuous RB sets and an interlacing pattern for the starting RB set and continuous or discontinuous RB sets.Aspect 11: The method of aspect 10, wherein the indication of the interlacing pattern comprises an interlacing pattern for a starting interlacing pattern for a first instance of the multi-slot burst communications and a shared offset value identifying the offset between each instance of the multi-slot burst communications.Aspect 12: The method of any of aspects 10 through 11, wherein the indication of the interlacing pattern comprises a bitmap where each bit in the bitmap is configured to identify a starting interlacing pattern for a first instance of the multi-slot burst communications and a separate offset value for each subsequent instance of the multi-slot burst communications identifying the offset between each instance.Aspect 13: A method for wireless communication at a second UE, comprising: transmitting an IUC request message from a first UE, the IUC request message identifying a request for resource scheduling information for the first UE, the second UE, or both; and receiving an IUC response message comprising the scheduling information from the first UE, the scheduling information comprising an indication of one or more of a RB set and interlacing pattern frequency configuration for multi-slot burst communications between the first UE and the second UE or a starting slot and slot burst length configuration for the multi-slot burst communications between the first UE and the second UE.Aspect 14: The method of aspect 13, further comprising: identifying, based at least in part on the IUC request message, a first RB set and interlacing pattern frequency configuration and a first starting slot and slot burst length configuration for the multi-slot burst communications between the first UE and the second UE, wherein the indicated RB set and interlacing pattern frequency configuration is based at least in part on the first RB set and interlacing pattern frequency configuration and the indicated starting slot and the slot burst length configuration is based at least in part on the first starting slot and slot burst length configuration.Aspect 15: The method of aspect 14, wherein the first RB set and interlacing pattern frequency configuration comprise a field indicating the starting RB set and number of continuous RB sets or a bitmap where each bit in the bitmap is configured to indicate the starting RB set and continuous or discontinuous RB sets.Aspect 16: The method of any of aspects 14 through 15, wherein the first RB set and interlacing pattern frequency configuration comprises a starting RB set with a number of continuous or discontinuous RB sets and an interlacing pattern for the starting RB set and continuous or discontinuous RB sets.Aspect 17: The method of any of aspects 14 through 16, wherein the first starting slot and slot burst length configuration comprises a timing resource indication value identifying the starting slot and a number of slots included for multi-slot burst communications between the first UE and the second UE.Aspect 18: [Proposal 2] The method of any of aspects 13 through 17, further comprising: identifying, based at least in part on the IUC response message, the indication of the starting slot and slot burst length configuration that comprises a timing resource indication value identifying the starting slot and a number of slots included for multi-slot burst communications between the first UE and the second UE.Aspect 19: The method of aspect 18, wherein the indication of the number of slots included for multi-slot burst communications comprises a shared indication of the number of slots that are included in each instance of the multi-slot burst communications, a first indication of the number of slots that are included in a first instance of the multi-slot burst communications and a second indication of the number of slots that are included in one or more additional instances of the multi-slot burst communications, or a separate indication of the number of slots that are included for each instance of the multi-slot burst communications.Aspect 20: The method of any of aspects 18 through 19, wherein the indication of the number of slots included for the multi-slot burst communication comprises one or more fields indicating the number of slots included for the multi-slot burst communications, where each field of the one or more fields has a shared field length or a different field length.Aspect 21: The method of any of aspects 18 through 20, wherein the indication of the timing resource indication value comprises an earliest starting slot for the multi-slot burst communications.Aspect 22: The method of any of aspects 13 through 21, further comprising: identifying, based at lest in part on the IUC response message, the indication of the RB set and interlacing pattern frequency configuration that comprises a starting RB set with a number of continuous or discontinuous RB sets and an interlacing pattern for the starting RB set and continuous or discontinuous RB sets.Aspect 23: The method of aspect 22, wherein the indication of the interlacing pattern comprises an interlacing pattern for a starting interlacing pattern for a first instance of the multi-slot burst communications and a shared offset value identifying the offset between each instance of the multi-slot burst communications.Aspect 24: The method of any of aspects 22 through 23, wherein the indication of the interlacing pattern comprises a bitmap where each bit in the bitmap is configured to identify a starting interlacing pattern for a first instance of the multi-slot burst communications and a separate offset value for each subsequent instance of the multi-slot burst communications identifying the offset between each instance.Aspect 25: An apparatus for wireless communication at a first UE, comprising a processor; memory in electronic communication with the processor; and instructions stored in the memory, wherein the instructions are executable by the processor to perform a method of any of aspects 1 through 12.Aspect 26: An apparatus for wireless communication at a first UE, comprising at least one means for performing a method of any of aspects 1 through 12.Aspect 27: A non-transitory computer-readable medium storing code for wireless communication at a first UE, the code comprising instructions executable by a processor to perform a method of any of aspects 1 through 12.Aspect 28: An apparatus for wireless communication at a second UE, comprising a processor; memory in electronic communication with the processor; and instructions stored in the memory, wherein the instructions are executable by the processor to perform a method of any of aspects 13 through 24.Aspect 29: An apparatus for wireless communication at a second UE, comprising at least one means for performing a method of any of aspects 13 through 24.Aspect 30: A non-transitory computer-readable medium storing code for wireless communication at a second UE, the code comprising instructions executable by a processor to perform a method of any of aspects 13 through 24.

Combinations of the above are also included within the scope of computer-readable media.