EP-4158979-B1 - SCHEDULING RESOURCES FOR USER EQUIPMENT (UE) SIDELINK COMMUNICATION

EP4158979B1EP 4158979 B1EP4158979 B1EP 4158979B1EP-4158979-B1

Inventors

FONG, LIK HANG SILAS
SUN, JING
GUPTA, PIYUSH
LI, JUNYI
ZHANG, XIAOXIA
WANG, XIAOJIE

Dates

Publication Date: 20260513
Application Date: 20210329

Claims (9)

A method of wireless communication, comprising: scheduling (601), by a base station, resources for a sidelink between a first user equipment, UE,, and a specified second UE, wherein the first UE is in communication with the base station and is a UE to transmit to the specified second UE via the sidelink and the specified second UE is a receiver UE for the sidelink; and transmitting (602), by the base station, control signaling to the first UE to implement the sidelink between the first UE and the specified second UE in accordance with the scheduling, wherein the control signaling is configured to identify the specified second UE, wherein the control signaling is downlink control information, DCI, and is configured to carry a sidelink receiver UE indicator, corresponding to the specified second UE, by: scrambling, by the base station, a cyclic redundancy check, CRC, of the DCI using a sidelink-radio network temporary identifier, SL-RNTI, corresponding to the first UE or the specified second UE and distributing the SL-RNTI to the first UE.
The method of claim 1, further comprising: controlling, by the base station, resources allocated to the sidelink between the first UE and the specified second UE using downlink control information, DCI.
The method of claim 1, further comprising: determining, by the base station, if additional resource allocation is to be provided for the sidelink between the first UE and the specified second UE based at least in part on an acknowledgment/negative-acknowledgment, ACK/NACK, received from the first UE via a physical uplink control channel, PUCCH.
The method of claim 1, further comprising: associating, by the base station, one or more hybrid automatic repeat request, HARQ, process identifiers with the specified second UE, wherein downlink control information, DCI, carries the one or more HARQ process identifiers to identify the specified second UE as a receiver UE for the sidelink.
The method of claim 1, wherein the scheduling is with respect to a configured grant, CG, and wherein scrambling the CRC of the DCI comprises: scrambling the CRC using a sidelink-configured scheduling-transmitter UE-receiver UE-radio network temporary identifier, SL-CS-TX-RX-RNTI, corresponding to the first UE and the specified second UE.
An apparatus configured for wireless communication, the apparatus comprising: at least one processor; and a memory coupled to the at least one processor, wherein the at least one processor is configured: to schedule, by a base station, resources for a sidelink between a first user equipment, UE, and a specified second UE, wherein the first UE is in communication with the base station and is a UE to transmit to the specified second UE via the sidelink; and to transmit, by the base station, control signaling to the first UE to implement the sidelink between the first UE and the specified second UE in accordance with the scheduling, wherein the control signaling is configured to identify the specified second UE, wherein the control signaling is downlink control information, DCI, and is configured to carry a sidelink receiver UE indicator, corresponding to the specified second UE, by: scrambling, by the base station, a cyclic redundancy check, CRC, of the DCI using a sidelink-radio network temporary identifier, SL-RNTI, corresponding to the first UE or the specified second UE and distributing the SL-RNTI to the first UE.
A method of wireless communication, comprising: receiving, by a first user equipment, UE, from a base station, control signaling scheduling resources for a sidelink between the first UE and a specified second UE, wherein the first UE is in communication with the base station and is a UE to transmit to the specified second UE via the sidelink, and wherein the control signaling is configured to identify the specified second UE, wherein the control signaling is downlink control information, DCI, and is configured to carry a sidelink receiver UE indicator, corresponding to the specified second UE, by scrambling, by the base station, a cyclic redundancy check, CRC, of the DCI using a sidelink-radio network temporary identifier, SL-RNTI, corresponding to the first UE or the specified second UE and distributing the SL-RNTI to the first UE; and implementing, by the first UE based on the control signaling, the sidelink between the first UE and the specified second UE in accordance with the scheduling.
The method of claim 7, wherein the first UE operates under control of the base station to implement resources allocated to the sidelink between the first UE and the specified second UE as designated by downlink control information, DCI.
An apparatus configured for wireless communication, the apparatus comprising: at least one processor; and a memory coupled to the at least one processor, wherein the at least one processor is configured: to receive, by a first user equipment, UE, from a base station, control signaling scheduling resources for a sidelink between the first UE and a specified second UE, wherein the first UE is in communication with the base station and is a UE to transmit to the specified second UE via the sidelink, and wherein the control signaling is configured to identify the specified second UE, wherein the control signaling is downlink control information, DCI, and is configured to carry a sidelink receiver UE indicator, corresponding to the specified second UE, by: scrambling, by the base station, a cyclic redundancy check, CRC, of the DCI using a sidelink-radio network temporary identifier, SL-RNTI, corresponding to the first UE or the specified second UE and distributing the SL-RNTI to the first UE: and to implement, by the first UE based on the control signaling, the sidelink between the first UE and the specified second UE in accordance with the scheduling.

Description

TECHNICAL FIELD Aspects of the present disclosure relate generally to wireless communication systems, and more particularly, to scheduling resources for user equipment (UE) sidelink communication. Certain embodiments of the technology discussed below can enable and provide scheduling of resources for a sidelink between a first UE in communication with a base station and a specified second UE in communication with the first UE, such as using downlink control information (DCI) and/or radio resource control (RRC) signaling. Prior art examples are: US 2020/022089 A1 (GUO LI [US]) 16 January 2020; WO 2020/030703 A1 (FRAUNHOFER GES FORSCHUNG [DE]) 13 February 2020; 3GPP contribution doc.: "Considerations on Sidelink HARQ Procedure", Source: SAMSUNG, vol. RAN WG1, no. Athens, Greece; 20190225 - 20190301 15 February 2019 INTRODUCTION Wireless communication networks are widely deployed to provide various communication services such as voice, video, packet data, messaging, broadcast, and the like. These wireless networks may be multiple-access networks capable of supporting multiple users by sharing the available network resources. Such networks, which are usually multiple access networks, support communications for multiple users by sharing the available network resources. A wireless communication network may include a number of base stations or node Bs that can support communication for a number of user equipments (UEs). A UE may communicate with a base station via downlink and uplink. The downlink (or forward link) refers to the communication link from the base station to the UE, and the uplink (or reverse link) refers to the communication link from the UE to the base station. A base station may transmit data and control information on the downlink to a UE and/or may receive data and control information on the uplink from the UE. On the downlink, a transmission from the base station may encounter interference due to transmissions from neighbor base stations or from other wireless radio frequency (RF) transmitters. On the uplink, a transmission from the UE may encounter interference from uplink transmissions of other UEs communicating with the neighbor base stations or from other wireless RF transmitters. This interference may degrade performance on both the downlink and uplink. The UEs may comprise various device configurations, such as a mobile wireless device, an Internet of Things (IoT) or Internet of Everything (IoE) device, etc., and may have particular associated communication needs and/or requirements. For example, latency and reliability requirements for Industrial Internet of Things (IIoT) traffic are stringent (e.g., latency ≈ 1-2ms and reliability ≈ 10-5-10-6 block error rate (BLER)). The aforementioned interference presents challenges with respect to some wireless communications meeting needs and/or requirements of the particular wireless devices and situations. SUMMARY The scope of the present invention is defined in the appended independent claims 1, 6, 7 and 9. Specific embodiments of the present invention are defined in the dependent claims. The following summarizes some aspects of the present disclosure to provide a basic understanding of the discussed technology. This summary is not an extensive overview of all contemplated features of the disclosure and is intended neither to identify key or critical elements of all aspects of the disclosure nor to delineate the scope of any or all aspects of the disclosure. Its sole purpose is to present some concepts of one or more aspects of the disclosure in summary form as a prelude to the more detailed description that is presented later. In one aspect of the disclosure, a method of wireless communication is provided. The method may include scheduling resources for a sidelink between a first user equipment (UE) and a specified second UE. The first UE may be in communication with a base station and may be a UE to transmit to the specified second UE via the sidelink. The method may also include transmitting control signaling to the first UE to implement the sidelink between the first UE and the specified second UE in accordance with the scheduling. The control signaling may be configured to identify the specified second UE. In an additional aspect of the disclosure, an apparatus configured for wireless communication is provided. The apparatus may include means for scheduling resources for a sidelink between a first UE and a specified second UE. The first UE may be in communication with a base station and may be a UE to transmit to the specified second UE via the sidelink. The apparatus may also include means for transmitting control signaling to the first UE to implement the sidelink between the first UE and the specified second UE in accordance with the scheduling. The control signaling may be configured to identify the specified second UE. In an additional aspect of the disclosure, a non-transitory computer-readable medium having program code recorded ther