US-12628203-B2 - Sidelink resource collision handling and resource allocation through user equipment coordination

US12628203B2US 12628203 B2US12628203 B2US 12628203B2US-12628203-B2

Abstract

A user equipment (UE) may detect a collision or interference issues of a second UE and transmit information regarding the detected collision to a base station. The second UE may not able to sense the channel on its own and thus may inadvertently use resources already reserved or in use by other UEs. The information regarding the detected collision may include layer-1 identifiers (L1 IDs) and/or layer-2 identifiers (L2 IDs) corresponding to the UE and/or the second UE as well as additional information corresponding to the resource collision. This information may be usable by the base station in determining that the base station has previously communicated with the second UE and may trigger a resource reselection by the second UE. The UE may receive sidelink communications on one or more reselected sidelink transmission resources from the second UE.

Inventors

Zhibin Wu
Yuqin Chen
Adesh Kumar
Chunxuan Ye
Dawei Zhang
Fangli XU
Haijing Hu
Naveen Kumar R. PALLE VENKATA
Sethuraman Gurumoorthy
Srirang A. Lovlekar

Assignees

APPLE INC.

Dates

Publication Date: 20260512
Application Date: 20201022

Claims (20)

1 . An apparatus, comprising: a memory: and at least one processor in communication with the memory and configured to cause a user equipment (UE) to: receive, from a second UE, a periodic sidelink message identifying the second UE as a transmit only UE that is not capable of receiving sidelink transmissions and performing sidelink channel sensing; detect a collision of one or more resources resulting from one or more sidelink transmissions of the second UE; and transmit information regarding the detected collision to a base station, wherein the information regarding the detected collision includes at least one identifier of the UE and at least one identifier of the second UE, and wherein the at least one identifier of the UE and the at least one identifier of the second UE are useable by the base station to verify that the second UE caused the collision and to cause the base station to reconfigure the second UE to discontinue using sidelink resources which caused the collision.
2 . The apparatus of claim 1 , wherein the information regarding the detected collision is configured to cause the base station to reconfigure the second UE to use one or more additional sidelink resources in place of the sidelink resources which caused the collision.
3 . The apparatus of claim 2 , wherein the information regarding the detected collision at least partially comprises one or more layer-2 identifiers (L2 IDs) of intended transmissions.
4 . The apparatus of claim 1 , wherein the information regarding the detected collision is configured to cause the base station to trigger the second UE to perform a sidelink resource reselection.
5 . The apparatus of claim 1 , wherein the information regarding the detected collision is further configured to cause the base station to re-configure a mode-2 resource pool.
6 . The apparatus of claim 1 , wherein the information regarding the detected collision is further configured to cause the base station to trigger the second UE to use one or more additional sidelink resources in place of the sidelink resources which caused the collision.
7 . The apparatus of claim 1 , wherein the periodic sidelink message comprises a physical sidelink control channel (PSCCH) transmission including a capability field or flag indicating a transmit-only capability of the second UE.
8 . The apparatus of claim 7 , wherein the periodic sidelink message further comprises a Layer-2 identifier of the second UE.
9 . The apparatus of claim 1 , wherein a periodicity of the sidelink message identifying the second UE as a transmit-only UE is based on at least one of a mobility state of the second UE, a detected collision density, or a power-saving configuration of the second UE.
10 . A wireless device, comprising: wireless communication circuitry; and at least one processor coupled to the wireless communication circuitry and configured to cause the wireless device to: receive, from a second wireless device, a periodic sidelink message identifying the second wireless device as a transmit only wireless device that is not capable of receiving sidelink transmissions and performing sidelink channel sensing; detect a collision of one or more resources resulting from one or more sidelink transmissions of the second wireless device; and transmit information regarding the detected collision to a base station, wherein the information regarding the detected collision includes at least one identifier of the wireless device and at least one identifier of the second wireless device, and wherein the at least one identifier of the wireless device and the at least one identifier of the second wireless device are useable by the base station to verify that the second wireless device caused the collision and to cause the base station to reconfigure the second wireless device to discontinue using sidelink resources which caused the collision.
11 . The wireless device of claim 10 , wherein the information regarding the detected collision is further configured to cause the base station to trigger the second wireless device to perform a sidelink resource reselection.
12 . The wireless device of claim 10 , wherein the information regarding the detected collision is further configured to cause the base station to re-configure a mode-2 resource pool.
13 . The wireless device of claim 10 , wherein the information regarding the detected collision is further configured to cause the base station to trigger the second wireless device to use one or more additional sidelink resources in place of the sidelink resources which caused the collision.
14 . The wireless device of claim 10 , wherein the information regarding the detected collision at least partially comprises one or more layer-2 identifiers (L2 IDs) of intended transmissions.
15 . An apparatus, comprising: a memory; and at least one processor in communication with the memory and configured to cause a cellular base station to: receive information regarding one or more transmissions from a first user equipment (UE) that periodically transmits a sidelink message identifying itself as a transmit only UE that is not capable of receiving sidelink transmissions and performing sidelink channel sensing; receive additional information regarding a detected collision from a second UE,; wherein the additional information regarding the detected collision including at least one identifier of the first UE and at least one identifier of the second UE useable by the cellular base station to verify that the first UE caused the collision; determine the identity of the first UE based at least in part on the received information from the first UE and the received additional information from the second UE; and transmit, based at least in part in response to determining the identity of the first UE, signaling to the first UE to direct the first UE to discontinue usage of sidelink resources which caused the collision.
16 . The apparatus of claim 15 , wherein the signaling is configured to cause the cellular base station to reconfigure the first UE to use one or more additional sidelink resources in place of the sidelink resources which caused the collision.
17 . The apparatus of claim 15 , wherein the signaling is configured to cause the cellular base station to trigger the first UE to perform a sidelink resource reselection.
18 . The apparatus of claim 15 , wherein the information received from first UE at least partially comprises one or more layer-2 identifiers (L2 IDs) of intended transmissions.
19 . The apparatus of claim 15 , wherein the cellular base station is further configured to re-configure a mode-2 resource pool based at least in part on receiving the additional information regarding the detected collision.
20 . The apparatus of claim 15 , wherein the at least one processor is further configured to cause the cellular base station to: transmit, to the first UE, an acknowledgement that indicates that the first UE's capability as a transmit only UE has been registered and instructs the first UE to reduce or suspend transmission of the periodic sidelink message.

Description

PRIORITY CLAIM INFORMATION This application is a national stage application of International Application No. PCT/CN2020/122773, filed on Oct. 22, 2020, titled “Sidelink Resource Collision Handling and Resource Allocation Through User Equipment Coordination”, which is hereby incorporated by reference in its entirety. The claims in the instant application are different than those of the parent application or other related applications. The Applicant therefore rescinds any disclaimer of claim scope made in the parent application or any predecessor application in relation to the instant application. The Examiner is therefore advised that any such previous disclaimer and the cited references that it was made to avoid, may need to be revisited. Further, any disclaimer made in the instant application should not be read into or against the parent application or other related applications. FIELD The present application relates to wireless devices, and more particularly to an apparatus, system, and method for detecting and reporting sidelink collision/interference issues on behalf of a user equipment via a base station and coordinating UE in order to provide improved sidelink resource allocation. DESCRIPTION OF THE RELATED ART Wireless communication systems are rapidly growing in usage. One recent development in cellular communications is referred to as sidelink communication, where two user equipment (UE) devices communicate with each other without an intervening base station. One proposed use of sidelink wireless communications is in vehicular applications, particularly in V2X (vehicle-to-everything) systems. V2X systems allow for communication between vehicles (e.g., via communications devices housed in or otherwise carried by vehicles), pedestrian UEs (including UEs carried by other persons such as cyclists, etc.), and other wireless communications devices for various purposes, such as to coordinate traffic activity, facilitate autonomous driving, and perform collision avoidance. The increased communication requirements of certain V2X systems may strain the power and resource capabilities of portable, battery-powered UE devices. In addition, some. UEs may lack sidelink receiving capabilities for communicating with other UEs or may experience interference from other UEs. This may result in increased resource collisions during sidelink communications and may further present decreased battery life, increased latency, and degraded communication issues. Accordingly, improvements in the field would be desirable. Embodiments are presented herein of apparatuses, systems, and methods for detecting and reporting sidelink collision/interference issues on behalf of user equipment (UE) via a base station and coordinating UE in order to minimize resource collisions and provide improved sidelink resource allocation, as well as reduce latency and power consumption, and enhance reliability. Some embodiments relate to a user equipment (UE), comprising at least one antenna, a radio operably coupled to the at least one antenna, and a processor operably coupled to the radio. The (first) UE may be further configured to detect sidelink collision/interference issues of another (second) UE and transmit information regarding the detected collision to a base station. The second UE may be a fully capable UE (capable of both sidelink transmit and receive) or may be a transmit only UE. The second UE may not be able to adequately sense the sidelink channel for available resources, due to various circumstances that may arise. In the case where the second UE is a transmit only UE, the second UE may not be able to sense the channel on its own and thus may inadvertently use resources already reserved or in use by other UEs. The information regarding the detected collision may include address or identifier information sufficient for the base station to identify the second UE (the “culprit UE”), as well as additional information corresponding to the resource collision. For example, the address or identifier information may include layer-1 identifiers (L1 IDs) and/or layer-2 identifiers (L2 IDs) corresponding to the UE and/or the second UE. The information regarding the detected collision may be usable by the base station in determining that the base station has previously communicated with the second UE and may further cause the base station to trigger a resource reselection by the second UE. When the second UE receives new resources due to its reselection, the second UE may then begin transmitting using these resources. The first UE may then receive sidelink communications on one or more reselected sidelink transmission resources from the second UE. In some aspects, the second UE may be a transmit-only UE and may be configured to periodically transmit sidelink communications indicating that it is a transmit-only UE. Moreover, in other aspects, the second UE may be further configured to operate as a mode-1 UE. Moreover, the second UE may be configur