EP-4740664-A1 - FREQUENCY RESOURCE ALLOCATION FOR NON-CONTIGUOUS SUBCHANNELS IN SIDELINK COMMUNICATIONS

EP4740664A1EP 4740664 A1EP4740664 A1EP 4740664A1EP-4740664-A1

Abstract

Methods, systems, and devices for wireless communication are described. In some examples, a user equipment (UE) may receive control signaling that indicates a frequency resource allocation for at least a first sidelink resource and a second sidelink resource, where the frequency resource allocation may indicate a non-contiguous subchannel combination for the second sidelink resource. In response to receiving the control signaling, the UE may select the non-contiguous subchannel combination for the second sidelink resource based on a mapping between an index value of the frequency resource allocation and multiple subchannel combinations. The UE may also select a subchannel combination for the first sidelink resource based on a relationship between the first sidelink resource and the second sidelink resource. In response to selecting the subchannel combinations for the first and second sidelink resources, the UE may communicate via a sidelink channel using the first sidelink resource and the second sidelink resource.

Inventors

GUO, Shaozhen
XU, CHANGLONG
LIU, CHIH-HAO
SUN, JING
CHEN, SIYI
YANG, Luanxia
CHISCI, GIOVANNI
ZHANG, XIAOXIA
XU, HAO

Assignees

QUALCOMM INCORPORATED

Dates

Publication Date: 20260513
Application Date: 20230707

Claims (20)

A user equipment (UE) for wireless communication, comprising: one or more memories storing processor-executable code; and one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the UE to: receive control signaling that indicates a frequency resource allocation for multiple sidelink resources, the multiple sidelink resources including at least a first sidelink resource and a second sidelink resource, wherein the frequency resource allocation indicates a non-contiguous subchannel combination for the second sidelink resource of the multiple sidelink resources; and communicate via a sidelink channel using at least the first sidelink resource and the second sidelink resource of the multiple sidelink resources, wherein a subchannel combination for the first sidelink resource is based at least in part on a relationship between the first sidelink resource and the second sidelink resource and on a quantity of the multiple sidelink resources.
The UE of claim 1, wherein the control signaling indicates an index value associated with the frequency resource allocation for selecting the non-contiguous subchannel combination for the second sidelink resource, and the one or more processors are individually or collectively further operable to execute the code to cause the UE: select the non-contiguous subchannel combination for the second sidelink resource based at least in part on the index value associated with the frequency resource allocation.
The UE of claim 2, wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to: map the index value associated with the frequency resource allocation to one of a plurality of subchannel combinations, wherein selecting the non-contiguous subchannel combination for the second sidelink resource is based at least in part on mapping the index value to one of the plurality of subchannel combinations.
The UE of claim 2, wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to: select the non-contiguous subchannel combination for the second sidelink resource as the subchannel combination for the first sidelink resource, wherein the relationship between the second sidelink resource and the first sidelink resource comprises the non-contiguous subchannel combination for the second sidelink resource being applied to each of the multiple sidelink resources.
The UE of claim 2, wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to: select a second non-contiguous subchannel combination as the subchannel combination for the first sidelink resource, wherein the relationship between the second sidelink resource and the first sidelink resource comprises that each of the multiple sidelink resources are associated with a respective non-contiguous subchannel combination.
The UE of claim 5, wherein selecting the second non-contiguous subchannel combination for the first sidelink resource is based at least in part on a starting subchannel index of a PSCCH and a defined offset.
The UE of claim 6, wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to: calculate a difference between a first index of a first subchannel of the non-contiguous subchannel combination for the second sidelink resource and a second index of a second subchannel of the non-contiguous subchannel combination for the second sidelink resource, wherein the defined offset is based at least in part on the difference.
The UE of claim 6, wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to: receive, via the control signaling, an indication of the defined offset.
The UE of claim 5, wherein selecting the second non-contiguous subchannel combination is based at least in part on a starting subchannel index of a PSCCH and a quantity of subchannels indicated via the frequency resource allocation.
The UE of claim 9, wherein the second non-contiguous subchannel combination has a same starting subchannel index as the PSCCH and a same quantity of subchannels as the non-contiguous subchannel combination for the second sidelink resource.
The UE of claim 9, wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to: receive, via the control signaling, an indication of the second non-contiguous subchannel combination for the first sidelink resource, wherein the second non-contiguous subchannel combination is selected based on the indication.
The UE of claim 2, wherein the subchannel combination for the first sidelink resource is a contiguous subchannel combination.
The UE of claim 12, wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to: receive, via the control signaling, an indication of the contiguous subchannel combination.
The UE of claim 12, wherein the contiguous subchannel combination is based at least in part on a starting subchannel index of a PSCCH and a quantity of subchannels indicated via the frequency resource allocation.
The UE of claim 2, wherein selecting the non-contiguous subchannel combination for the second sidelink resource is further based at least in part on a starting subchannel index of a PSCCH.
The UE of claim 2, wherein selecting the non-contiguous subchannel combination for the second sidelink resource is further based at least in part on a quantity of subchannels for the second sidelink resource and a quantity of subchannel indexes of the non-contiguous subchannel combination for the second sidelink resource.
The UE of claim 2, wherein a quantity of bits of the index value of the frequency resource allocation is based at least in part on a quantity of a plurality of contiguous subchannel combinations for the multiple sidelink resources and a quantity of a plurality of non-contiguous subchannel combinations for the multiple sidelink resources.
A user equipment (UE) for wireless communication, comprising: one or more memories storing processor-executable code; and one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the UE to: transmit control signaling that indicates a frequency resource allocation for multiple sidelink resources, the multiple sidelink resources including at least a first sidelink resource and a second sidelink resource, wherein the frequency resource allocation indicates a non-contiguous subchannel combination for the second sidelink resource of the multiple sidelink resources; and communicate via a sidelink channel using at least the first sidelink resource and the second sidelink resource of the multiple sidelink resources, wherein a subchannel combination for the first sidelink resource is based at least in part on a relationship between the second sidelink resource and the first sidelink resource and on a quantity of the multiple sidelink resources.
The UE of claim 18, wherein the non-contiguous subchannel combination for the second sidelink resource is based at least in part on an index value of the frequency resource allocation.
The UE of claim 19, wherein the subchannel combination for the first sidelink resource is equivalent to the non-contiguous subchannel combination for the second sidelink resource.

Description

FREQUENCY RESOURCE ALLOCATION FOR NON-CONTIGUOUS SUBCHANNELS IN SIDELINK COMMUNICATIONS FIELD OF TECHNOLOGY The following relates to wireless communications, including frequency resource allocation for non-contiguous subchannels in sidelink communications. BACKGROUND Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power) . Examples of such multiple-access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems. These systems may employ technologies such as code division multiple access (CDMA) , time division multiple access (TDMA) , frequency division multiple access (FDMA) , orthogonal FDMA (OFDMA) , or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM) . A wireless multiple-access communications system may include one or more base stations, each supporting wireless communication for communication devices, which may be known as user equipment (UE) . SUMMARY The described techniques relate to improved methods, systems, devices, and apparatuses that support frequency resource allocation for non-contiguous subchannels in sidelink communications. For example, the described techniques provide for a first user equipment (UE) to receive, and for a network entity or a second UE to transmit, non-contiguous subchannel allocations for multiple sidelink resources, thereby enabling increased transmission power in sidelink communications. For example, the first UE may receive, and the network entity or the second UE may transmit, control signaling that indicates a frequency resource allocation for at least a first sidelink resource and a second sidelink resource, where the frequency resource allocation may indicate a non- contiguous subchannel combination for the second sidelink resource. In response to receiving the control signaling, the first UE may select the non-contiguous subchannel combination for the second sidelink resource based on a mapping between an index value of the frequency resource allocation and multiple subchannel combinations. The first UE may also select a subchannel combination for the first sidelink resource based on a relationship between the first sidelink resource and the second sidelink resource. In response to selecting the subchannel combinations for the first and second sidelink resources, the first UE and the second UE may communicate via a sidelink channel using the first sidelink resource and the second sidelink resource. A method for wireless communications by a UE is described. The method may include receiving control signaling that indicates a frequency resource allocation for multiple sidelink resources, the multiple sidelink resources including at least a first sidelink resource and a second sidelink resource, where the frequency resource allocation indicates a non-contiguous subchannel combination for the second sidelink resource of the multiple sidelink resources and communicating via a sidelink channel using at least the first sidelink resource and the second sidelink resource of the multiple sidelink resources, where a subchannel combination for the first sidelink resource is based on a relationship between the first sidelink resource and the second sidelink resource and on a quantity of the multiple sidelink resources. A UE for wireless communication is described. The UE may include one or more memories storing processor-executable code and one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the UE to receive control signaling that indicates a frequency resource allocation for multiple sidelink resources, the multiple sidelink resources including at least a first sidelink resource and a second sidelink resource, where the frequency resource allocation indicates a non-contiguous subchannel combination for the second sidelink resource of the multiple sidelink resources and communicate via a sidelink channel using at least the first sidelink resource and the second sidelink resource of the multiple sidelink resources, where a subchannel combination for the first sidelink resource is based on a relationship between the first sidelink resource and the second sidelink resource and on a quantity of the multiple sidelink resources. Another UE for wireless communication is described. The UE may include means for receiving control signaling that indicates a frequency resource allocation for multiple sidelink resources, the multiple sidelink resources including at least a first sidelink resource and a second sidelink resource, whe