EP-4381850-B1 - SIDELINK GRANT COLLISION HANDLING

EP4381850B1EP 4381850 B1EP4381850 B1EP 4381850B1EP-4381850-B1

Inventors

WANG, XIAOJIE
SARKIS, GABI
ZHANG, XIAOXIA
LI, JUNYI
GUPTA, PIYUSH

Dates

Publication Date: 20260506
Application Date: 20220712

Claims (15)

A user equipment, UE, for wireless communication, comprising: means (802) for receiving, from a network entity, an indication of a first sidelink grant associated with a first set of resources; means (802) for receiving, from the network entity, an indication of a second sidelink grant associated with a second set of resources, wherein the first set of resources at least partially overlaps in a time domain with the second set of resources; means (140) for performing an action based at least in part on the first set of resources at least partially overlapping in the time domain with the second set of resources, wherein the performing the action includes selecting one or more sidelink grants, from the first sidelink grant and the second sidelink grant, to be used for a transmission based at least in part on a transmit power budget of the UE; and means (804) for transmitting one or more sidelink messages using the selected one or more sidelink grants based at least in part on performing the action.
The UE of claim 1, wherein the first sidelink grant and the second sidelink grant are included in a set of colliding sidelink grants, and wherein a number of the selected one or more sidelink grants is based at least in part on a threshold number.
The UE of claim 1, wherein the selecting the one or more sidelink grants is further based on at least one of: channel state information, beam information associated with the first sidelink grant and beam information associated with the second sidelink grant, a frequency gap (520) between the first sidelink grant and the second sidelink, a peak to average power ratio, PAPR, threshold, a first packet delay budget, PDB, associated with the first sidelink grant, a second PDB associated with the second sidelink grant, or a receiver associated with at least one of the first sidelink grant or the second sidelink grant.
The UE of claim 1, further comprising means for refraining from transmitting a first sidelink message using the first sidelink grant; means for identifying a future sidelink grant that can be used to transmit the first sidelink message; means for transmitting the first sidelink message in the future sidelink grant associated with the first sidelink grant; and means for transmitting, to the network entity, feedback information indicating that the first sidelink message was successfully transmitted.
The UE of claim 1, further comprising means for selecting both the first sidelink grant and the second sidelink grant for sidelink transmissions based on the transmit power budget of the UE and a frequency gap (520) between the first set of resources and the second set of resources being less than or equal to a frequency gap threshold, and wherein the means for transmitting the one or more sidelink messages includes means for transmitting a first sidelink message using the first sidelink grant and the first set of resources and means for transmitting a second sidelink message using the second sidelink grant and the second set of resources; or the UE of claim 1, wherein the first set of resources at least partially overlap in a frequency domain with the second set of resources, and wherein the means for performing the action includes means for allocating one or more common frequency domain resources, from the first set of resources and the second set of resources, to either the first sidelink grant or the second sidelink grant, and wherein the means for transmitting the one or more sidelink messages includes means for transmitting a first sidelink message using the first sidelink grant and the first set of resources and means for transmitting a second sidelink message using the second sidelink grant and the second set of resources.
The UE of claim 1, wherein the first sidelink grant and the second sidelink grant are included in a set of colliding sidelink grants, and wherein the means for performing the action includes means for performing a first action to resolve collisions among sidelink grants, included in the set of colliding sidelink grants, that are associated with different sidelink grant types; and means for performing a second action to resolve collisions among sidelink grants, included in the set of colliding sidelink grants, that are associated with a same sidelink grant type.
The UE of claim 1, further includes means for detecting a first trigger associated with transmitting using the first sidelink grant; and means for detecting a second trigger associated with transmitting using the second sidelink grant, wherein performing the action is based at least in part on detecting the first trigger and detecting the second trigger.
A method of wireless communication performed by a user equipment, UE, comprising: receiving (610, 710), from a network entity, an indication of a first sidelink grant associated with a first set of resources; receiving (610, 720), from the network entity, an indication of a second sidelink grant associated with a second set of resources, wherein the first set of resources at least partially overlaps in a time domain with the second set of resources; performing (625, 730) an action based at least in part on the first set of resources at least partially overlapping in the time domain with the second set of resources, wherein the performing the action includes selecting one or more sidelink grants, from the first sidelink grant and the second sidelink grant, to be used for a transmission based at least in part on a transmit power budget of the UE; and transmitting (630, 740) one or more sidelink messages using the selected one or more sidelink grants based at least in part on performing the action.
The method of claim 8, wherein the first sidelink grant and the second sidelink grant are included in a set of colliding sidelink grants, and wherein a number of the selected one or more sidelink grants is based at least in part on a threshold number.
The method of claim 8, wherein the selecting the one or more sidelink grants is further based on at least one of: channel state information, beam information associated with the first sidelink grant and beam information associated with the second sidelink grant, a frequency gap (520) between the first sidelink grant and the second sidelink, a peak to average power ratio, PAPR, threshold, a first packet delay budget, PDB, associated with the first sidelink grant, a second PDB associated with the second sidelink grant, or a receiver associated with at least one of the first sidelink grant or the second sidelink grant.
The method of claim 8, wherein the performing the action comprises: refraining from transmitting a first sidelink message using the first sidelink grant; identifying a future sidelink grant that can be used to transmit the first sidelink message; transmitting the first sidelink message in the future sidelink grant associated with the first sidelink grant; and transmitting, to the network entity, feedback information indicating that the first sidelink message was successfully transmitted.
The method of claim 8, wherein the performing the action comprises: selecting both the first sidelink grant and the second sidelink grant for sidelink transmissions based on the transmit power budget of the UE and a frequency gap (520) between the first set of resources and the second set of resources being less than or equal to a frequency gap threshold, and wherein the transmitting the one or more sidelink messages comprises: transmitting a first sidelink message using the first sidelink grant and the first set of resources; and transmitting a second sidelink message using the second sidelink grant and the second set of resources; or the method of claim 8, wherein the first set of resources at least partially overlap in a frequency domain with the second set of resources, and wherein the performing the action comprises: allocating one or more common frequency domain resources, from the first set of resources and the second set of resources, to either the first sidelink grant or the second sidelink grant; and wherein the transmitting the one or more sidelink messages comprises: transmitting a first sidelink message using the first sidelink grant and the first set of resources; and transmitting a second sidelink message using the second sidelink grant and the second set of resources.
The method of claim 8, wherein the first sidelink grant and the second sidelink grant are included in a set of colliding sidelink grants, and wherein performing the action comprises: performing a first action to resolve collisions among sidelink grants, included in the set of colliding sidelink grants, that are associated with different sidelink grant types; and performing a second action to resolve collisions among sidelink grants, included in the set of colliding sidelink grants, that are associated with a same sidelink grant type.
The method of claim 8, further comprising: detecting a first trigger associated with transmitting using the first sidelink grant; and detecting a second trigger associated with transmitting using the second sidelink grant, wherein performing the action is based at least in part on detecting the first trigger and detecting the second trigger.
A computer program comprising instructions which, when the program is executed by a computer, cause the computer to carry out the method of any of claims 8 to 14.

Description

FIELD OF THE DISCLOSURE Aspects of the present disclosure generally relate to wireless communication and to techniques and apparatuses for sidelink grant collision handling. BACKGROUND Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, or the like). Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP). A wireless network may include one or more base stations that support communication for a user equipment (UE) or multiple UEs. A UE may communicate with a base station via downlink communications and uplink communications. "Downlink" (or "DL") refers to a communication link from the base station to the UE, and "uplink" (or "UL") refers to a communication link from the UE to the base station. The above multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different UEs to communicate on a municipal, national, regional, and/or global level. New Radio (NR), which may be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the 3GPP. NR is designed to better support mobile broadband internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink, using CP-OFDM and/or single-carrier frequency division multiplexing (SC-FDM) (also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink, as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. As the demand for mobile broadband access continues to increase, further improvements in LTE, NR, and other radio access technologies remain useful. EP 3 796 731 A1 discloses an apparatus for use in a UE includes processing circuitry coupled to a memory. To configure the UE for enhanced UL configured grant transmission supporting multiple configured grant configurations in a 5G-NR network, the processing circuitry is to decode first RRC signaling including the multiple configured grant configurations for a single BWP. Each of the multiple configured grant configurations includes a corresponding configuration index identifying the configured grant configuration. Second RRC signaling is decoded which includes logical channel configurations with a list of allowed configured grant configurations of the multiple configured grant configurations. Each of the allowed configured grant configurations is identified by the corresponding configuration index. A PUSCH is encoded for a UL transmission using one of the allowed configured grant configurations. 3GPP document R2-2003555 discusses remaining MAC open issues, i.e. left-over functional issues for 5G V2X with NR SL. WO 2020/168223 A1 relates to Intra-UE Prioritization in uplink (UL) transmissions. In an example, an apparatus may receive first information indicating a first uplink grant associated with a first transmission and second information indicating a second uplink grant associated with a second transmission. The apparatus may determine, based on the first information and the second information, that the first transmission and the second transmission overlap at least partially in time. The apparatus may determine a first priority associated with the first transmission and a second priority associated with the second transmission. The apparatus may then cause, based at least in part on the first priority and the second priority, at least one of: prioritization of one transmission over another transmission, or preemption of the first transmission by the second transmission. SUMMARY The invention is defined by the independent claims. Some aspects described herein relate to a user equipment (UE) for wireless communication, according to independent claim 1. Some aspects described herein relate to a method of wireless communication performed by a UE, according to independent claim 8. Some aspects described herein relate to a computer program comprising instructions for wireless communication,