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EP-4169318-B1 - METHOD AND APPARATUS FOR CONFIGURATION AND SIGNALING OF SIDELINK RESOURCES FOR INTER-UE COORDINATION

EP4169318B1EP 4169318 B1EP4169318 B1EP 4169318B1EP-4169318-B1

Inventors

  • FARAG, Emad Nader

Dates

Publication Date
20260513
Application Date
20210723

Claims (15)

  1. A user equipment, UE, (116) comprising: a transceiver (310); and a processor (340) , wherein the transceiver (310) is configured to: receive configuration information to enable inter-UE co-ordination for a sidelink, SL, resource pool, and, if inter-UE co-ordination is enabled, transmit, to a target UE for an SL transmission, a signal to trigger a transmission of inter-UE co-ordination information, and receive, from the target UE, the inter-UE co-ordination information, wherein the inter-UE co-ordination information indicates a plurality of resources of the SL resource pool including at least one of preferred resources and non-preferred resources, wherein the processor (340) is further configured to determine a set of candidate SL resources based on the at least one of preferred resources and non-preferred resources, and select a SL resource within the determined set, wherein the transceiver (310) is further configured to transmit a SL channel on the SL resource.
  2. The UE of claim 1, wherein: the signal to trigger the transmission of inter-UE co-ordination information is included in SL control information, SCI, and the signal to trigger the transmission of inter-UE co-ordination information includes information indicating a priority of the SL transmission.
  3. The UE of claim 1, wherein the configuration information is received from one of: a base station through an Uu interface, the target UE through a PC5 interface, or another UE through the PC5 interface.
  4. The UE of claim 1, wherein for determining the set of candidate SL resources, the processor is configured to: identify whether there are resources determined based on sensing by the UE, and in case that there are resources determined based on sensing by the UE and the preferred resources are identified based on the inter UE co-ordination information, determine an intersection of the preferred resources and the resources as the set of candidate SL resources.
  5. The UE of claim 4, wherein the resources are determined by excluding the non-preferred resources.
  6. The UE of claim 1, wherein the inter-UE co-ordination information indicates at least one of: a start of a sensing window for determination of the inter-UE co-ordination information, an end of the sensing window, a duration of the sensing window, one or more resources reserved by decoded SL control information, SCI, in the sensing window and associated priorities, and a SL reference signal receive power, RSRP, of the decoded SCI in the sensing window.
  7. The UE of claim 1, wherein the inter-UE co-ordination information is based on sensing at the target UE, and wherein the preferred resources are resources available for SL transmission and the non-preferred resources are resources not available for SL transmission.
  8. A target user equipment, UE, (116) comprising: a transceiver (310) ; and a processor (340) , wherein the transceiver (310) is configured to: receive configuration information to enable inter-UE co-ordination for a sidelink, SL, resource pool, and, if inter-UE co-ordination is enabled, receive, from a UE, a signal to trigger a transmission of inter-UE co-ordination information, wherein the processor (340) is further configured to determine, based on the configuration information and the signal to trigger the transmission of inter-UE co-ordination information, the inter-UE co-ordination information, wherein the transceiver (310) is further configured to transmit, to the UE, the inter-UE co-ordination information, wherein the inter-UE co-ordination information indicates a plurality of resources of the SL resource pool including at least one of preferred resources and non-preferred resources, and receive , from the UE, a SL channel on a SL resource, wherein the SL resource is from a set of candidate SL resources based on the at least one of preferred resources and non-preferred resources.
  9. The UE of claim 8, wherein: the signal to trigger the transmission of inter-UE co-ordination information is included in SL control information, SCI, and the signal to trigger the transmission of inter-UE co-ordination information includes information indicating a priority of an SL channel reception.
  10. The UE of claim 8, wherein the configuration information is received from one of: a base station through an Uu interface, a second UE from which the SL channel was received, or a third UE through a PC5 interface.
  11. The UE of claim 8, wherein the inter-UE co-ordination information indicates at least one of: a start of a sensing window for the determination of the inter-UE co-ordination information, an end of the sensing window, a duration of the sensing window, one or more resources reserved by decoded SL control information, SCI, in the sensing window and associated priorities, and a SL reference signal receive power, RSRP, of the decoded SCI in the sensing window.
  12. The UE of claim 8, wherein inter-UE co-ordination information is determined based on sensing at the UE, and wherein the preferred resources are resources available for an SL channel reception and the non-preferred resources are resources not available for the SL channel reception.
  13. A method performed by a user equipment, UE, the method comprising: receiving configuration information to enable inter-UE co-ordination for a sidelink, SL, resource pool; and, if inter-UE co-ordination is enabled, transmitting, to a target UE for an SL transmission, a signal to trigger a transmission of inter-UE co-ordination information; receiving, from the target UE, the inter-UE co-ordination information, wherein the inter-UE co-ordination information indicates a plurality of resources of the SL resource pool including at least one of preferred resources and non-preferred resources; determining a set of candidate SL resources based on the at least one of preferred resources and non-preferred resources; selecting a SL resource within the determined set; and transmitting a SL channel on the SL resource.
  14. The method of claim 13, wherein determining the set of candidate SL resources comprises: identifying whether there are resources determined based on sensing by the UE; and in case that there are resources determined based on sensing by the UE and the preferred resources are identified based on the inter UE co-ordination information, determining an intersection of the preferred resources and the resources as the set of candidate SL resources.
  15. The method of claim 14, wherein the resources are determined by excluding the non-preferred resources.

Description

Technical Field The present disclosure relates generally to wireless communication systems and, more specifically, the present disclosure relates to configuration and signaling of sidelink (SL) resources for inter-UE co-ordination. Background Art To meet the demand for wireless data traffic having increased since deployment of 4G communication systems, efforts have been made to develop an improved 5G or pre-5G communication system. Therefore, the 5G or pre-5G communication system is also called a 'Beyond 4G Network' or a 'Post LTE System'. The 5G communication system is considered to be implemented in higher frequency (mmWave) bands, e.g., 60GHz bands, so as to accomplish higher data rates. To decrease propagation loss of the radio waves and increase the transmission distance, the beamforming, massive multiple-input multiple-output (MIMO), Full Dimensional MIMO (FD-MIMO), array antenna, an analog beam forming, large scale antenna techniques are discussed in 5G communication systems. In addition, in 5G communication systems, development for system network improvement is under way based on advanced small cells, cloud Radio Access Networks (RANs), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, moving network, cooperative communication, Coordinated Multi-Points (CoMP), reception-end interference cancellation and the like. In the 5G system, Hybrid FSK and QAM Modulation (FQAM) and sliding window superposition coding (SWSC) as an advanced coding modulation (ACM), and filter bank multi carrier(FBMC), non-orthogonal multiple access(NOMA), and sparse code multiple access (SCMA) as an advanced access technology have been developed. 5th generation (5G) or new radio (NR) mobile communications is recently gathering increased momentum with all the worldwide technical activities on the various candidate technologies from industry and academia. The candidate enablers for the 5G/NR mobile communications include massive antenna technologies, from legacy cellular frequency bands up to high frequencies, to provide beamforming gain and support increased capacity, new waveform (e.g., a new radio access technology (RAT)) to flexibly accommodate various services/applications with different requirements, new multiple access schemes to support massive connections, and so on. HUAWEI ET AL: "On Sidelink enhancement", 3GPP DRAFT; R1-2004602, vol. RAN WG1, no. E-meeting; 20200525 - 20200605 16 May 2020 (2020-05-16) discusses NR sidelink enhancement. VIVO: "OoS management for sidelink", 3GPP DRAFT; R1-1908155 OOS MANAGEMENT FOR SIDELINK, vol. RAN WG1, no. Prague, CZ; 20190826 - 20190830 17 August 2019 (2019-08-17) discusses QoS management for sidelink. TCL COMMUNICATION: "Views on Sidelink_Enhancement Priorities for R17", 3GPP DRAFT; RP-192834, vol. TSG RAN, no. Sitges, Spain; 20191209 - 20191212 2 December 2019 (2019-12-02) discusses the enhancements for sidelink work item. [Disclosure of Invention] [Technical Problem] A monitoring procedure for resource (re)selection during a sensing window requires reception and decoding of a sidelink control information (SCI) format during the sensing window. This reception and decoding process increases a processing complexity and power consumption of a user equipment (UE) for sidelink communication and requires the UE to have receive circuitry on the sidelink for sensing even if the UE only transmits and does not receive on the sidelink. [Solution to Problem] The present disclosure relates to wireless communication systems and, more specifically, the present disclosure relates to configuration and signaling of SL resources for inter-UE co-ordination. In one embodiment, a UE according to claim 1 is provided. In another embodiment, another UE according to claim 8 is provided. In yet another embodiment, a method of operating a UE according to claim 13 is provided. Other technical features may be readily apparent to one skilled in the art from the following figures, descriptions, and claims. Before undertaking the DETAILED DESCRIPTION below, it may be advantageous to set forth definitions of certain words and phrases used throughout this patent document. The term "couple" and its derivatives refer to any direct or indirect communication between two or more elements, whether or not those elements are in physical contact with one another. The terms "transmit," "receive," and "communicate," as well as derivatives thereof, encompass both direct and indirect communication. The terms "include" and "comprise," as well as derivatives thereof, mean inclusion without limitation. The term "or" is inclusive, meaning and/or. The phrase "associated with," as well as derivatives thereof, means to include, be included within, interconnect with, contain, be contained within, connect to or with, couple to or with, be communicable with, cooperate with, interleave, juxtapose, be proximate to, be bound to or with, have, have a property of, have a relationship to or with, or the like. The ter