Resource exclusion and transmission on the sidelink with a multi-TRP enabled UE

Abstract

Certain aspects of the present disclosure provide a method for wireless communication by a user equipment (UE). The method generally includes: performing received signal power measurements on a first transmit reception point (TRP) of the UE and a second TRP of the UE; determining resources to be excluded from a resource pool for sidelink transmission based on the received signal power measurements performed on the first TRP and the second TRP; selecting resources for sidelink communication from the resource pool based at least in part on the determination of the resources to be excluded; and transmitting on the sidelink using the selected resources on one or more of the first TRP and the second TRP.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application hereby claims priority to U.S. Application No. 17 / 319,227 filed on May 13, 2021, which claims priority under 35 U.S.C. §119 to pending U.S. Provisional Patent Application No. 63 / 037,850 filed on June 11, 2020, the contents of both applications being incorporated herein in their entirety.

[0003] Public domain

[0004] Aspects of the present disclosure relate to wireless communications, and more particularly, to device-to-device sidelink communications.

[0005] Related technical description

[0006] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcast, etc. These 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, etc.). Examples of such multiple-access systems include Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, 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, and Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems, to name just a few.

[0007] In some examples, a wireless multiple access communication system may include several base stations (BS), each of which is capable of simultaneously supporting communication of multiple communication devices (also referred to as user equipment (UE)). In an LTE or LTE-A network, a set of one or more base stations may define an evolved B node (eNB). In other examples (e.g., in a next generation, new radio (NR), or 5G network), a wireless multiple access communication system may include several distributed units (DUs) (e.g., edge units (EUs), edge nodes (ENs), radio heads (RHs), smart radio heads (SRHs), transmission reception points (TRPs), etc.) in communication with several central units (CUs) (e.g., central nodes (CNs), access node controllers (ANCs), etc.), wherein a set of one or more DUs in communication with a CU may define an access node (e.g., which may be referred to as a BS, a 5G NB, a next generation B node (gNB or gNodeB), a transmission reception point (TRP), etc.). A BS or DU may communicate with a set of UEs on downlink channels (eg, for transmissions from the BS or DU to the UEs) and uplink channels (eg, for transmissions from the UEs to the BS or DU).

[0008] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at a city, country, region, and even global level. NR (e.g., New Radio or 5G) is an example of an emerging telecommunication standard. NR is an enhancement set of the LTE mobile standard promulgated by 3GPP. NR is designed to better support mobile broadband Internet access by using OFDMA with a cyclic prefix (CP) on the downlink (DL) and uplink (UL) to improve spectrum efficiency, reduce costs, improve services, utilize new spectrum, and better integrate with other open standards. To this end, NR supports beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.

[0009] Sidelink communications are communications from one UE to another UE. As the demand for mobile broadband access continues to grow, there is a need for further improvements to NR and LTE technologies, including improvements to sidelink communications. Preferably, these improvements should be applicable to other multiple access technologies and telecommunication standards that employ these technologies.

[0010] Overview

[0011] The systems, methods, and devices of the present disclosure each have several aspects, no single one of which is solely responsible for its desirable attributes. Without limiting the scope of the present disclosure as expressed in the appended claims, some features will now be briefly discussed. After considering this discussion, and particularly after reading the section entitled "Detailed Description," it will be understood how the features of the present disclosure provide advantages including improved device-to-device communication in wireless networks.

[0012] Certain aspects of the present disclosure provide a method for wireless communication by a user equipment (UE). The method generally includes: performing received signal power measurements at a first transmit reception point (TRP) of the UE and a second TRP of the UE, determining a candidate resource set from a resource pool for sidelink transmission based on the received signal power measurements performed at the first TRP and the second TRP, selecting resources for sidelink communication from the candidate resource set, and transmitting on the sidelink via at least one of the first TRP or the second TRP using the selected resources.

[0013] Certain aspects of the present disclosure provide a method for wireless communication by a receiving UE. The method generally includes: receiving one or more sidelink control information (SCI) indicating resources for a sidelink transmission jointly scheduled on a first transmit reception point (TRP) and a second transmit reception point of the transmitting UE, and monitoring the indicated resources for the sidelink transmission.

[0014] Certain aspects of the present disclosure provide a user equipment (UE). The UE generally includes: means for performing received signal power measurements at a first transmit reception point (TRP) of the UE and a second TRP of the UE, means for determining a candidate resource set from a resource pool for sidelink transmission based on the received signal power measurements performed at the first TRP and the second TRP, means for selecting resources for sidelink communication from the candidate resource set, and means for transmitting on the sidelink via at least one of the first TRP or the second TRP using the selected resources.

[0015] Certain aspects of the present disclosure provide a receiving user equipment (UE). The receiving UE generally includes: means for receiving one or more sidelink control information (SCI) indicating resources for a sidelink transmission jointly scheduled on a first transmit reception point (TRP) and a second transmit reception point of the transmitting UE, and means for monitoring the indicated resources for the sidelink transmission.

[0016] Certain aspects of the present disclosure provide a user equipment (UE). The UE generally includes: a processing system and a transmitter, the processing system is configured to perform received signal power measurements at a first transmit reception point (TRP) of the UE and a second TRP of the UE, determine a candidate resource set from a resource pool for sidelink transmission based on the received signal power measurements performed at the first TRP and the second TRP, and select resources for sidelink communication from the candidate resource set, the transmitter is configured to transmit on the sidelink via at least one of the first TRP or the second TRP by using the selected resources.

[0017] Certain aspects of the present disclosure provide a receiving user equipment (UE). The receiving UE generally includes: a receiver and a processing system, the receiver is configured to receive one or more sidelink control information (SCI) indicating resources for sidelink transmissions jointly scheduled on a first transmit reception point (TRP) and a second transmit reception point of the transmitting UE, and the processing system is configured to monitor the indicated resources to find the sidelink transmission.

[0018] Certain aspects of the present disclosure provide an apparatus for wireless communication by a user equipment (UE). The apparatus generally includes: a processing system and an interface, the processing system is configured to perform received signal power measurements on a first transmit reception point (TRP) of the UE and a second TRP of the UE, determine a candidate resource set from a resource pool for sidelink transmission based on the received signal power measurements performed on the first TRP and the second TRP, and select resources for sidelink communication from the candidate resource set, and the interface is configured to output data for transmission on the sidelink via at least one of the first TRP or the second TRP using the selected resources.

[0019] Certain aspects of the present disclosure provide an apparatus for wireless communication by a receiving user equipment (UE). The apparatus generally includes an interface and a processing system, the interface being configured to obtain one or more sidelink control information (SCI) indicating resources for sidelink transmissions jointly scheduled on a first transmit reception point (TRP) and a second transmit reception point of the transmitting UE, and the processing system being configured to monitor the indicated resources to find the sidelink transmission.

[0020] Certain aspects of the present disclosure provide a computer-readable medium for wireless communication by a user equipment (UE). The computer-readable medium generally includes instructions executable by the UE to cause the UE to: receive one or more sidelink control information (SCI) indicating resources for sidelink transmissions jointly scheduled on a first transmit reception point (TRP) and a second transmit reception point of a transmitting UE and monitor the indicated resources for the sidelink transmission.

[0021] Certain aspects of the present disclosure provide a computer-readable medium for wireless communication by a receiving user equipment (UE). The computer-readable medium generally includes instructions executable by the receiving UE to cause the receiving UE to: perform received signal power measurements at a first transmit reception point (TRP) of the UE and a second TRP of the UE, determine a candidate resource set from a resource pool for sidelink transmission based on the received signal power measurements performed at the first TRP and the second TRP, select resources for sidelink communication from the candidate resource set, and transmit on the sidelink via at least one of the first TRP or the second TRP using the selected resources.

[0022] To achieve the foregoing and related ends, one or more aspects include features fully described below and particularly pointed out in the claims. The following description and the accompanying drawings set forth in detail certain illustrative features of one or more aspects. However, these features are only indicative of several of the various ways in which the principles of the various aspects can be employed. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to understand in detail the manner in which the above-stated features of the present disclosure are used, a more particular description of the content briefly summarized above may be made with reference to various aspects, some of which are illustrated in the accompanying drawings. It should be noted, however, that the accompanying drawings illustrate only certain typical aspects of the present disclosure and are not to be considered limiting of its scope, as the description may admit to other equally effective aspects.

[0025] Figure 1 is a block diagram conceptually illustrating an example telecommunications system in accordance with certain aspects of the present disclosure.

[0026] Figure 2 is a block diagram illustrating an example logical architecture of a distributed radio access network (RAN) in accordance with certain aspects of the present disclosure.

[0027] Figure 3 is a diagram illustrating an example physical architecture of a distributed RAN in accordance with certain aspects of the present disclosure.

[0028] Figure 4 is a block diagram conceptually illustrating designs of example base stations (BSs) and user equipment (UEs) in accordance with certain aspects of the present disclosure.

[0029] Figure 5A and 5B A pictorial representation of an example vehicle-to-everything (V2X) system is shown in accordance with some aspects of the present disclosure.

[0030] Figure 6 Illustrated are example allocations of resource pools for sidelink communications in accordance with certain aspects of the present disclosure.

[0031] Figure 7 is an example resource pool for sidelink communications.

[0032] Figure 8 Explains the two modes of sidelink communication.

[0033] Fig. 9 Example sidelink scenarios for a multiple transmit reception point (mTRP) enabled UE that may be utilized in accordance with aspects of the present disclosure are illustrated.

[0034] Fig.10

[0013] Example operations for wireless communications by a transmitting UE are illustrated in accordance with certain aspects of the present disclosure.

[0035] Fig.11

[0013] Example operations for wireless communications by a recipient UE are illustrated in accordance with certain aspects of the present disclosure.

[0036] Figure 12-14 Illustrated are example sidelink resource exclusion and selection for an mTRP-enabled UE in accordance with certain aspects of the present disclosure.

[0037] Figure 15-16 Examples of sidelink retransmission resources and indications thereof are illustrated in accordance with certain aspects of the present disclosure.

[0038] To facilitate understanding, identical reference numerals have been used, where possible, to designate identical elements that are common to the figures. It is contemplated that elements disclosed in one aspect may be beneficially utilized in other aspects without specific recitation.

[0039] Detailed Description

[0040] Various aspects of the present disclosure provide apparatus, methods, processing systems, and computer-readable media for resource exclusion and selection for sidelink transmissions by a multi-TRP (mTRP) enabled UE. As will be described in more detail below, for an mTRP UE, resource exclusion for transmissions may take into account RSRP measured at all TRPs. The techniques proposed herein may reduce latency and improve reliability in sidelink communications such as vehicle-to-everything (V2X) by effectively utilizing the enhanced hardware capabilities available in mTRP UEs.

[0041] The following description provides examples rather than limiting the scope, applicability, or examples set forth in the claims. Changes may be made to the functions and arrangements of the elements discussed without departing from the scope of the present disclosure. Various examples may appropriately omit, replace, or add various procedures or components. For example, the described method may be performed in an order different from the order described, and various steps may be added, omitted, or combined. Moreover, the features described with reference to some examples may be combined in some other examples. For example, any number of aspects set forth herein may be used to implement a device or practice method. In addition, the scope of the present disclosure is intended to cover such devices or methods practiced using other structures, functionality, or structures and functionality that are supplementary to or different from the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the present disclosure disclosed herein may be implemented by one or more elements of the claims. The wording "exemplary" is used herein to mean "used as an example, instance, or explanation". Any aspect described as "exemplary" herein is not necessarily to be interpreted as superior to or superior to other aspects.

[0042] The techniques described herein can be used for various wireless communication technologies, such as LTE, CDMA, TDMA, FDMA, OFDMA, SC-FDMA and other networks. The terms "network" and "system" are often used interchangeably. A CDMA network can implement radio technologies such as Universal Terrestrial Radio Access (UTRA), cdma2000, etc. UTRA includes other variants of Wideband CDMA (WCDMA) and CDMA. cdma2000 covers IS-2000, IS-95 and IS-856 standards. A TDMA network can implement radio technologies such as Global System for Mobile Communications (GSM). An OFDMA network can implement radio technologies such as NR (e.g., 5G RA), Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDMA, etc. UTRA and E-UTRA are part of Universal Mobile Telecommunications System (UMTS).

[0043] New Radio (NR) is an emerging wireless communication technology being developed in collaboration with the 5G Technology Forum (5GTF). 3GPP Long Term Evolution (LTE) and Advanced LTE (LTE-A) are versions of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization called "3rd Generation Partnership Project" (3GPP). Cdma2000 and UMB are described in documents from an organization called "3rd Generation Partnership Project 2" (3GPP2). The techniques described herein may be used for the wireless networks and radio technologies mentioned above as well as other wireless networks and radio technologies. For clarity, although various aspects may be described herein using terms commonly associated with 3G and / or 4G wireless technologies, various aspects of the present disclosure may be applied in communication systems based on other generations, such as 5G and later generations, including NR technologies.

[0044] New Radio (NR) access (e.g., 5G technology) can support various wireless communication services, such as enhanced mobile broadband (eMBB) targeting wide bandwidth (e.g., 80 MHz or higher), millimeter wave (mmW) targeting high carrier frequency (e.g., 25 GHz or higher), massive machine type communication MTC (mMTC) targeting non-backward compatible MTC technology, and / or mission critical services targeting ultra-reliable low latency communication (URLLC). These services may include latency and reliability requirements. These services may also have different transmission time intervals (TTIs) to meet corresponding quality of service (QoS) requirements. In addition, these services can coexist in the same subframe.

[0045] Figure 1 An example wireless communication network 100 is illustrated in which aspects of the present disclosure may be performed. For example, Figure 1 One or more UEs 120 may be configured to perform the following reference Fig.10 The described operations are to determine the mTRP UE of the sidelink resource manager 122 for resources to be used for sidelink transmission. Similarly, one or more UEs may be configured to perform Fig.11 Operation 1100 is used to process (from execution Fig.10 Operation 1000 of the mTRP UE) sidelink transmission.

[0046] like Figure 1As illustrated in , the wireless communication network 100 may include several base stations (BSs) 110a-z (each also individually referred to herein as BS 110 or collectively referred to as BS 110) and other network entities. In various aspects of the present disclosure, a roadside service unit (RSU) may be considered to be a type of BS, and BS 110 may be referred to as an RSU. BS 110 may provide communication coverage for a specific geographic area (sometimes referred to as a "cell"), which may be stationary or mobile depending on the location of the mobile BS 110. In some examples, BS 110 may be interconnected to each other and / or to one or more other BSs or network nodes (not shown) in the wireless communication network 100 using any suitable transport network via various types of backhaul interfaces (e.g., direct physical connections, wireless connections, virtual networks, etc.). Figure 1 In the example shown in , BSs 110a, 110b, and 110c may be macro BSs for macro cells 102a, 102b, and 102c, respectively. BS 110x may be a pico BS for a pico cell 102x. BSs 110y and 110z may be femto BSs for femto cells 102y and 102z, respectively. The BS may support one or more cells. BS 110 communicates with user equipment (UE) 120a-y (each also individually referred to herein as UE 120 or collectively referred to as UE 120) in the wireless communication network 100. UE 120 (e.g., 120x, 120y, etc.) may be dispersed throughout the wireless communication network 100, and each UE 120 may be stationary or mobile.

[0047] The wireless communication network 100 may also include a relay station (e.g., relay station 110r) (also referred to as a relay, etc.) that receives transmissions of data and / or other information from an upstream station (e.g., BS 110a or UE 120r) and sends transmissions of the data and / or other information to a downstream station (e.g., UE 120 or BS 110), or the relay station relays transmissions between UEs 120 to facilitate communication between the devices.

[0048] A network controller 130 may couple to a set of BSs 110 and provide coordination and control for these BSs 110. The network controller 130 may communicate with the BSs 110 via a backhaul. The BSs 110 may also communicate with each other (eg, directly or indirectly) via a wireless or wired backhaul.

[0049] UE 120 (e.g., 120x, 120y, etc.) may be dispersed throughout the wireless communication network 100, and each UE may be stationary or mobile. UE may also be referred to as a mobile station, terminal, access terminal, subscriber unit, station, customer premises equipment (CPE), cellular phone, smart phone, personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, laptop computer, cordless phone, wireless local loop (WLL) station, tablet computer, camera, gaming device, netbook, smartbook, ultrabook, appliance, medical device or medical equipment, biometric sensor / device, wearable device (such as smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet, etc.)), entertainment device (e.g., music device, video device, satellite radio, etc.), transportation component or sensor, smart meter / sensor, industrial manufacturing equipment, global positioning system device, or any other suitable device configured to communicate via wireless or wired medium. Some UEs may be considered machine type communication (MTC) devices or evolved MTC (eMTC) devices. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., which can communicate with a BS, another device (e.g., a remote device), or some other entity. A wireless node can provide connectivity for or to a network (e.g., a wide area network (such as the Internet) or a cellular network), for example, via a wired or wireless communication link. Some UEs may be considered Internet of Things (IoT) devices, which may be narrowband IoT (NB-IoT) devices.

[0050] Some wireless networks (e.g., LTE) utilize orthogonal frequency division multiplexing (OFDM) on the downlink and single carrier frequency division multiplexing (SC-FDM) on the uplink. OFDM and SC-FDM divide the system bandwidth into multiple (K) orthogonal subcarriers, which are also often referred to as frequency modulation, frequency bins, etc. Each subcarrier can be modulated with data. In general, modulation symbols are sent in the frequency domain for OFDM and in the time domain for SC-FDM. The spacing between adjacent subcarriers can be fixed, and the total number of subcarriers (K) can depend on the system bandwidth. For example, the spacing of subcarriers can be 15kHz, and the minimum resource allocation (called a "resource block" (RB)) can be 12 subcarriers (or 180kHz). Therefore, for system bandwidths of 1.25, 2.5, 5, 10, or 20 megahertz (MHz), the nominal fast Fourier transform (FFT) size can be equal to 128, 256, 512, 1024, or 2048, respectively. The system bandwidth may also be partitioned into subbands. For example, a subband may cover 1.08 MHz (ie, 6 resource blocks), and there may be 1, 2, 4, 8, or 16 subbands for system bandwidths of 1.25, 2.5, 5, 10, or 20 MHz, respectively.

[0051] Although aspects of the examples described herein may be associated with LTE technology, aspects of the present disclosure may be applicable to other wireless communication systems, such as NR. NR may utilize OFDM with CP on the uplink and downlink and include support for half-duplex operation using TDD. Beamforming may be supported and the beam direction may be dynamically configured. MIMO transmission with precoding may also be supported. MIMO configurations in the DL may support up to 8 transmit antennas (with multi-layer DL transmissions of up to 8 streams) and up to 2 streams per UE. Multi-layer transmissions of up to 2 streams per UE may be supported. Aggregation of multiple cells may be supported using up to 8 serving cells.

[0052] In some examples, access to the air interface may be scheduled. A scheduling entity (e.g., BS) allocates resources for communication between some or all devices and equipment within its service area or cell. A scheduling entity may be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more subordinate entities. That is, for scheduled communications, subordinate entities utilize resources allocated by the scheduling entity. A base station is not the only entity that can be used as a scheduling entity. In some examples, a UE may act as a scheduling entity, and may schedule resources for one or more subordinate entities (e.g., one or more other UEs), and other UEs may utilize resources scheduled by the UE for wireless communication. In some examples, a UE may act as a scheduling entity in a peer-to-peer (P2P) network and / or in a mesh network. In a mesh network example, UEs may communicate directly with each other in addition to communicating with a scheduling entity.

[0053] exist Figure 1 In FIG. 1 , a solid line with double arrows indicates desired transmissions between a UE and a serving BS, which is a BS designated to serve the UE on a downlink and / or uplink. A thin dashed line with double arrows indicates interfering transmissions between a UE and a BS.

[0054] Figure 2 An example logical architecture of a distributed radio access network (RAN) 200 is illustrated, which may be Figure 1 2. The 5G access node 206 may include an access node controller (ANC) 202. The ANC 202 may be a central unit (CU) of the distributed RAN 200. The backhaul interface to the next generation core network (NG-CN) 204 may be terminated at the ANC 202. The backhaul interface to the adjacent next generation access node (NG-AN) 210 may be terminated at the ANC 202. The ANC 202 may include one or more TRPs 208 (e.g., cellular cells, BSs, gNBs, etc.).

[0055] The TRP 208 may be a distributed unit (DU). The TRP 208 may be connected to a single ANC (e.g., ANC 202) or more than one ANC (not illustrated). For example, for RAN sharing, Radio as a Service (RaaS), and service-specific AND deployments, the TRP 208 may be connected to more than one ANC. Each of the TRPs 208 may include one or more antenna ports. The TRP 208 may be configured to serve traffic to the UE individually (e.g., dynamically selected) or jointly (e.g., jointly transmitted).

[0056] The logical architecture of the distributed RAN 200 may support fronthaul solutions across different deployment types. For example, the logical architecture may be based on transport network capabilities (eg, bandwidth, latency, and / or jitter).

[0057] The logical architecture of the distributed RAN 200 may share features and / or components with LTE. For example, the next generation access node (NG-AN) 210 may support dual connectivity with NR and may share a common fronthaul for LTE and NR.

[0058] The logical architecture of the distributed RAN 200 may enable collaboration between and among TRPs 208, for example, within a TRP and / or across TRPs via the ANC 202. An inter-TRP interface may not be used.

[0059] Logical functions may be dynamically distributed in the logical architecture of the distributed RAN 200. The radio resource control (RRC) layer, the packet data convergence protocol (PDCP) layer, the radio link control (RLC) layer, the medium access control (MAC) layer, and the physical (PHY) layer may be adaptively placed at the DU (e.g., TRP 208) or the CU (e.g., ANC 202).

[0060] Figure 3 An example physical architecture of a distributed RAN 300 in accordance with aspects of the present disclosure is illustrated. A centralized core network unit (C-CU) 302 may host core network functions. The C-CU 302 may be centrally deployed. C-CU 302 functionality may be offloaded (e.g., to Advanced Wireless Services (AWS)) in an effort to handle peak capacity.

[0061] A centralized RAN unit (C-RU) 304 may host one or more ANC functions. Optionally, the C-RU 304 may host core network functions locally. The C-RU 304 may have a distributed deployment. The C-RU 304 may be close to the edge of the network.

[0062] The DU 306 may host one or more TRPs (edge ​​node (EN), edge unit (EU), radio head (RH), smart radio head (SRH), etc.) The DU may be located at the edge of the network with radio frequency (RF) functionality.

[0063] Figure 4 Explained (such as Figure 1 1 and 120a, which may be used to implement aspects of the present disclosure. For example, antenna 452, processors 466, 458, 464, and / or controller / processor 480 of UE 120a may be used to perform the operations described herein. Fig.10 Various techniques and methods are described.

[0064] At BS 110a, a transmit processor 420 may receive data from a data source 412 and control information from a controller / processor 440. The control information may be for a physical broadcast channel (PBCH), a physical control format indicator channel (PCFICH), a physical hybrid ARQ indicator channel (PHICH), a physical downlink control channel (PDCCH), a group common PDCCH (GC PDCCH), etc. The data may be for a physical downlink shared channel (PDSCH), etc. The processor 420 may process (e.g., encode and symbol map) the data and the control information to obtain data symbols and control symbols, respectively. The processor 420 may also generate reference symbols (e.g., of a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a cell-specific reference signal (CRS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 430 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, and / or reference symbols, where applicable, and may provide an output symbol stream to modulators (MODs) 432a to 432t. Each modulator 432 may process a respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator may further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The downlink signals from modulators 432a to 432t may be transmitted via antennas 434a to 434t, respectively.

[0065] At UE 120a, antennas 452a to 452r may receive downlink signals from base station 110a and may provide received signals to demodulators (DEMODs) 454a to 454r in the transceiver, respectively. Each demodulator 454 may condition (e.g., filter, amplify, downconvert, and digitize) a respective received signal to obtain input samples. Each demodulator may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. A MIMO detector 456 may obtain received symbols from all demodulators 454a to 454r, perform MIMO detection on the received symbols where applicable, and provide detected symbols. A receive processor 458 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for UE 120a to a data sink 460, and provide decoded control information to a controller / processor 480.

[0066] On the uplink, at the UE 120a, a transmit processor 464 may receive and process data from a data source 462 (e.g., for a physical uplink shared channel (PUSCH)) and control information from a controller / processor 480 (e.g., for a physical uplink control channel (PUCCH)). The transmit processor 464 may also generate reference symbols for reference signals (e.g., a sounding reference signal (SRS)). The symbols from the transmit processor 464 may be precoded by a TX MIMO processor 466, if applicable, further processed by demodulators 454a to 454r in the transceiver (e.g., for SC-FDM, etc.), and transmitted to the base station 110a. At the BS 110a, the uplink signal from the UE 120a may be received by the antenna 434, processed by the modulator 432, detected by the MIMO detector 436, if applicable, and further processed by the receive processor 438 to obtain decoded data and control information sent by the UE 120a. Receive processor 438 may provide decoded data to data sink 439 and decoded control information to controller / processor 440 .

[0067] Controllers / processors 440 and 480 may direct the operation at BS 110a and UE 120a, respectively. Processor 440 and / or other processors and modules at BS 110a may perform or direct the execution of processes for the techniques described herein. Figure 4 As shown in FIG. 1 , the controller / processor 480 of the UE 120a has a plurality of components that can be configured to perform Fig.10 Operation 1000 and / or Fig.11 The side link manager 481 of operation 1100.

[0068] In some cases, two or more subordinate entities (e.g., UEs) may communicate with each other using sidelink signals. Real-world applications of such sidelink communications may include public safety, proximity services, UE-to-network relay, vehicle-to-vehicle (V2V) communications, Internet of Everything (IoE) communications, IoT communications, mission-critical mesh networks, and / or various other suitable applications. Generally, a sidelink signal may refer to a signal that is communicated from one subordinate entity (e.g., UE1) to another subordinate entity (e.g., UE2) without relaying the communication through a scheduling entity (e.g., UE or BS), even if the scheduling entity may be used for scheduling and / or control purposes. In some examples, the sidelink signal may be communicated using a licensed spectrum (unlike a wireless local area network (WLAN), which typically uses an unlicensed spectrum).

[0069] Figure 5A and 5B A diagrammatic representation of an example vehicle-to-everything (V2X) system is shown in accordance with some aspects of the present disclosure. For example, Figure 5A and 5B The vehicles shown in may communicate via a sidelink channel and may perform sidelink CSI reporting as described herein.

[0070] exist Figure 5A and 5B The V2X system provided in provides two complementary transmission modes. Figure 5A The first transmission mode, shown by way of example in FIG. 1 , involves direct communication between parties that are adjacent to each other in a local area (e.g., also referred to as sidelink communication). Figure 5B The second transmission mode illustrated by way of example in FIG. 8 involves network communication through a network, which may be implemented through a Uu interface (eg, a wireless communication interface between a radio access network (RAN) and a UE).

[0071] Reference Figure 5A , a V2X system 500 (e.g., including vehicle-to-vehicle (V2V) communications) is illustrated with two vehicles 502, 504. A first transmission mode allows direct communication between different parties in a given geographic location. As illustrated, the vehicles may have a wireless communication link 506 with an individual through a PC5 interface (i.e., vehicle to pedestrian (V2P), e.g., via a UE). Communications between vehicles 502 and 504 may also occur through a PC5 interface 508. In a similar manner, communications from vehicle 502 to other highway components (e.g., roadside service units 510, such as traffic signals or signs) (i.e., vehicle to infrastructure (V2I)) may occur through a PC5 interface 512. For Figure 5A For each communication explained in the above, bidirectional communication can be performed between elements, so each element can be a transmitter and receiver of information. The V2X system 500 can be a self-managed system implemented without the assistance of a network entity. The self-managed system can achieve improved spectrum efficiency, reduced costs, and increased reliability because no network service interruption occurs during the switching operation of the moving vehicle. The V2X system can be configured to operate in a licensed or unlicensed spectrum, whereby any vehicle equipped with the system can access the common frequency and share information. Such coordinated / shared spectrum operation allows safe and reliable operation.

[0072] Figure 5BA V2X system 550 is shown for communicating between a vehicle 552 and a vehicle 554 through a network entity 556. These network communications may occur through discrete nodes (such as base stations, e.g., eNBs or gNBs) that send information to and receive information from (e.g., relay information between) the vehicles 552, 554. Network communications through vehicle-to-network (V2N) links 558 and 510 may be used, for example, for long-range communications between vehicles, such as for communicating that there is a traffic accident at a distance ahead along a road or highway. Other types of communications may be sent by nodes to vehicles, such as traffic flow conditions, road hazard warnings, environmental / weather reports, service station availability, and other similar examples. Such data may be obtained from a cloud-based sharing service.

[0073] In some cases, two or more subordinate entities (e.g., UEs) may communicate with each other using sidelink signals. As described above, V2V and V2X communications are examples of communications that can be transmitted via a sidelink. When a UE is transmitting a sidelink communication on a subchannel of a frequency band, the UE is generally unable to receive another communication in the frequency band (e.g., another sidelink communication from another UE). Other applications of sidelink communications may include public safety or service announcement communications, proximity service communications, UE-to-network relay communications, device-to-device (D2D) communications, Internet of Everything (IoE) communications, Internet of Things (IoT) communications, mission-critical mesh communications, and other suitable applications. In general, a sidelink may refer to a direct link between a subordinate entity (e.g., UE1) and another subordinate entity (e.g., UE2). In this way, a sidelink may be used to transmit and receive communications (also referred to herein as "sidelink signals") without relaying communications through a scheduling entity (e.g., BS), even if the scheduling entity may be used for scheduling or control purposes. In some examples, sidelink signals may be communicated using licensed spectrum (unlike wireless local area networks, which typically use unlicensed spectrum).

[0074] Various sidelink channels may be used for sidelink communications, including a physical sidelink discovery channel (PSDCH), a physical sidelink control channel (PSCCH), a physical sidelink shared channel (PSSCH), and a physical sidelink feedback channel (PSFCH). The PSDCH may carry discovery expressions that enable neighboring devices to discover each other. The PSCCH may carry control signaling (such as sidelink resource configuration and other parameters for data transmission), while the PSSCH may carry data transmission.

[0075] For operations on PSSCH, the UE may perform transmission or reception in a time slot on a carrier. Reservation or allocation of transmission resources for sidelink transmission is typically performed on a subchannel of a frequency band during a time slot. The NR sidelink may provide support for the UE for a scenario where all symbols in a time slot are available for the sidelink and another scenario where only a subset of consecutive symbols in a time slot are available for the sidelink.

[0076] The PSFCH may carry feedback such as channel state information (CSI) related to the sidelink channel quality. Sequence-based PSFCH formats with one symbol (excluding the AGC training period) may be supported. The following formats are possible: a PSFCH format based on PUCCH format 2, and a PSFCH format that spans all symbols available for the sidelink in a slot.

[0077] Figure 6 is how the resources of the common resource pool 600 can be allocated to the UE (eg, Figure 1 10) between the UE 110) shown in FIG. As mentioned above, with reference to FIG. Figure 5A and 5B , a side link generally refers to a link between two users, or a user relay can be used in different scenarios and different applications. As previously described, when a UE transmits a side link communication on a subchannel of a frequency band, the UE is generally unable to receive another communication in the frequency band (e.g., another side link communication from another UE). Thus, the side link communication may be referred to as half-duplex. Thus, UE 0, UE 1, and UE 5, which transmit side link communications 612, 614, and 616, respectively, cannot receive side link communications from each other. That is, UE 0 cannot receive side link transmissions 614 and 616. Similarly, UE 2 cannot receive side link transmissions 624 and 632 from UE 3 and UE 4, respectively. Moreover, UE 3 cannot receive side link transmission 622 from UE 2, and UE 4 cannot receive side link transmission 634 from UE 2. In various aspects of the present disclosure, for a UE or wireless node that cannot receive a side link transmission, the side link transmission (s) that cannot be received may be referred to as "erasures" because the UE has no information about the side link transmission. This is different from other cases where the UE fails to decode a transmission because in those cases the UE may retain some information about the transmission that the UE failed to decode, and the UE may combine the retained information with retransmissions received by the UE to determine the transmission that the UE failed to decode.

[0078] According to previously known techniques, in NR sidelink communications, resource allocation is based on reservation. In these techniques, resource allocation is performed in units of subchannels in the frequency domain, and resource allocation is limited to one time slot in the time domain. In previously known techniques, transmission can reserve resources in the current time slot and up to two future time slots. Reservation information can be carried in sidelink control information (SCI). In previously known techniques, sidelink control information (SCI) can be transmitted in two stages. The first stage SCI (SCI-1) can be transmitted on the physical sidelink control channel (PSCCH) and contains resource reservation information and information required for decoding the second stage SCI (SCI-2). SCI-2 can be transmitted on the physical sidelink shared channel (PSSCH) and contains information required for decoding data on the shared channel (SCH) and providing feedback (e.g., acknowledgment (ACK) or negative acknowledgment (NAK)) on the physical sidelink feedback channel (PSFCH).

[0079] Figure 7 700 is an example resource pool for sidelink communications. As illustrated, the minimum resource allocation unit is a subchannel in the frequency domain (i.e., as shown on the y-axis) and the resource allocation in the time domain is a time slot (i.e., as shown on the x-axis). For example, depending on the subcarrier spacing (SCS) value, and depending on whether a normal cyclic prefix (CP) or an extended CP is used, a time slot in the time domain may include 12 or 14 orthogonal frequency division multiplexing (OFDM) symbols.

[0080] In the frequency domain, each subchannel may include a set number of consecutive resource blocks (RBs), which may include 12 consecutive subcarriers with the same SCS (such as 10, 15, 20, 25... etc. consecutive RBs depending on the actual configuration). In the following, each resource unit in a time slot and a subchannel is referred to as a resource or a resource unit. For a certain resource pool, the coordinates of the time slot index (e.g., the nth time slot in the x-axis of the time domain) and the subchannel index (e.g., the mth subchannel in the y-axis of the frequency domain) can be used to refer to the resources therein. Interchangeably, the time slot index can be referred to as the time index; and the subchannel index can be referred to as the frequency index.

[0081] Figure 8 Two modes of resource allocation for sidelink communication, Mode 1 and Mode 2, are explained.

[0082] In Mode 1 sidelink communication, the sidelink resources are usually scheduled by the gNB. In Mode 2 sidelink communication, the UE may autonomously select sidelink resources from the (pre-)configured sidelink resource pool(s) based on a channel sensing mechanism. When the UE is in coverage, the gNB may be configured to adopt Mode 1 or Mode 2. When the UE is out of coverage, only Mode 2 may be adopted.

[0083] In Mode 2, when traffic arrives at the transmitting UE, the transmitting UE may select resources for PSCCH and PSSCH, and / or reserve resources for retransmission to minimize waiting time. Therefore, in a conventional configuration, the transmitting UE will select resources for PSSCH associated with PSCCH for initial transmission and blind retransmission, which incurs unnecessary resources and associated power consumption. In order to avoid such resource waste and other similar resource duplication / blind reservation / redundancy, such as Fig. 9 As shown in , UEs in sidelink communication may communicate to use a subset of these resources.

[0084] Example resource exclusion and transmission on the sidelink with an mTRP-enabled UE

[0085] Various aspects of the present disclosure provide techniques for resource exclusion and selection for sidelink transmissions by a multi-TRP (mTRP) enabled UE. As will be described in more detail below, the techniques provide resource exclusion for transmissions that take into account RSRP measured at all TRPs. The techniques proposed herein can reduce latency and improve reliability in sidelink communications by effectively utilizing the enhanced hardware capabilities available in mTRP UEs.

[0086] Some vehicles may have two or more transmit-receive points (TRPs). For example, a car may have a front and read antenna panel. Larger vehicles, such as trucks and trailers, may have multiple TRPs. In such cases, the TRPs on the same vehicle may be separated by considerable distances (e.g., 3-4 meters for a car or 20 meters or more for an 18-wheel truck and trailer).

[0087] Fig. 9 Illustrated how each TRP (TRP1 and TRP2) of an mTRP UE sees the sidelink communication channel differently. When transmitting using an mTRP UE, each TRP will have a different Reference Signal Received Power (RSRP) measurement from the same peer UE. This may be due to range differences, line-of-sight (LoS) vs. non-line-of-sight (NLoS) channels, obstructions, etc.

[0088] exist Fig. 9 In the illustrated example, TRP1 has a good link to UE3, but TRP2 does not have a good link to UE3 due to being blocked by UE2. TRP2 observes a stronger RSRP from UE1 (RSRP>threshold), while TRP1 observes a weaker RSRP from UE1 (RSRP<threshold) due to the greater distance.

[0089] The current standard specification lacks special provisions for mTRP transmission. As a result, the hardware capabilities of mTRP UEs may not be fully utilized for sidelink communications. Different TRPs will have different channels to peer UEs, and therefore they will have different RSRPs observed from the same peer at different TRPs (e.g., Fig. 9 ).

[0090] However, aspects of the present disclosure may take advantage of this observation to better utilize network resources by transmitting different signals or signal powers from different TRPs. The techniques presented herein propose techniques for efficient multi-TRP transmission based on self-measurement (e.g., by transmitting on one TRP while receiving on another TRP). RSRP measurements for different time-frequency resources on different TRPs will be different. In addition, an mTRP UE may also have different assumptions about interference between its own TRPs.

[0091] Resource exclusion for transmission may take into account the RSRP measured on all TRPs to achieve efficient resource selection. Resource exclusion generally refers to identifying certain resources from the sidelink resource pool that are not suitable for transmission (e.g., due to excessive interference or reservations by other UEs). Resource exclusion may also take into account resources reserved by other UEs (e.g., as indicated in the SCI). However, the techniques presented herein allow for resource exclusion when there are multiple TRPs at the transmitter. When there are multiple TRPs at the transmitter, resource exclusion and selection may also be optimized to achieve faster retransmissions or concurrent transmissions.

[0092] Fig.10 1 illustrates example operations 1000 for wireless communications by a transmitting UE in accordance with certain aspects of the present disclosure. For example, when performing sidelink communications with another UE (which may or may not be mTRP-enabled), the transmitting UE may Figure 1 or Figure 4 The mTRP UE 120 performs operation 1000.

[0093] Operation 1000 begins at 1002 by performing received signal power measurements at a first transmit reception point (TRP) of a transmitting UE and a second TRP of the transmitting UE. At 1004, the transmitting UE determines candidate resources from a resource pool for sidelink transmission based on the received signal power measurements determined or performed at the first TRP and the second TRP or determines resources to be excluded from the resource pool for sidelink transmission based on the received signal power measurements performed at the first TRP and the second TRP. At 1006, the transmitting UE selects resources for sidelink communication from the candidate resource set or selects resources from the resource pool for sidelink communication based at least in part on the determination of the resources to be excluded. At 1008, the transmitting UE transmits on the sidelink via at least one of the first TRP or the second TRP using the selected resources.

[0094] Fig.11 Example operations 1100 for wireless communications by a receiving UE are illustrated and may be considered similar to Fig.10 The operation 1000 is complementary. For example, Figure 1 or Figure 4 The UE 120 performs operation 1100 to receive and process the Fig.10 The operations 1000 of the UE transmit a sidelink transmission of an mTRP.

[0095] Operations 1100 begin at 1102 by receiving one or more sidelink control information (SCI) indicating resources for a sidelink transmission jointly scheduled on a first transmit reception point (TRP) and a second transmit reception point of a transmitting UE. At 1104, the receiving UE monitors the indicated resources for the sidelink transmission.

[0096] As mentioned above, resource exclusion generally refers to identifying certain resources from the sidelink resource pool as unsuitable for transmission. By definition, the remaining resources (unavailable) may be considered available for sidelink transmission. One approach for a UE with m TRPs is to consider a resource available (only) when the (interference) RSRP measured on the time-frequency resource for each TRP is below a threshold:

[0097] max(RSRP 1 , RSRP 2 ,…RSRP m )≤ρ thresh .

[0098] According to this approach, if the condition is not met, the time-frequency resource is considered to be excluded.

[0099] However, according to the joint scheduling proposed in this article, sidelink transmissions can be performed with only one TRP or a subset of the TRPs, taking into account resource exclusions (and resource availability) at all TRPs. In other words, because different TRPs can observe different channels, different resources can be used for transmissions on different TRPs. As a result, the techniques proposed in this article can utilize network resources more efficiently.

[0100] For example, Fig.12 The RSRP observed by TRP1 and TRP2 of an mTRP UE on each time / frequency resource is illustrated. For example, the RSRP observed by each TRP on each resource may be determined based on self-measurement (e.g., performed while transmitting on one TRP while measuring the RSRP of a different time / frequency resource on another TRP). For purposes of illustration, physical resource blocks (PRBs) are shown with cross-hatching to indicate excluded (RSRP greater than a threshold) resources (PRBs) and PRBs are shown with solid blocks to indicate available resources (RSRP less than or equal to the threshold).

[0101] In the case where the transmission is performed on a single TRP, the TRP selected for transmission may be the earliest available TRP having sufficient resources for the transmission.

[0102] Refer again Fig.12 , assuming that the UE needs to select 4 physical resource blocks (PRBs) to transmit a transport block (TB) via sidelink transmission, 4 PRBs occur earlier for TRP 2 (time slots 1-2) than for TRP 1 (time slot 4). Therefore, in this case, TRP 2 can be selected for sidelink transmission because it has the earliest resources.

[0103] In another example, the TRP with the earliest resources that meet the exclusion criteria may be selected (e.g., the lowest exclusion in terms of measured RSRP). For example, in a 2 TRP scenario, RSRP-based exclusion may result in sufficient resources for TRP1 in slot 4 with an exclusion RSRP metric of -90 dBm (ex RSRP = -90 dBm) and sufficient resources for TRP2 in slot 3 but with an exclusion RSRP metric of -80 dBm (ex RSRP = -80 dBm). In such a scenario, even if sufficient resources are found later (slot 4) for TRP1, TRP1 may be selected because those resources with lower exclusion RSRPs may be selected, which increases the probability of successful transmission due to reduced interference.

[0104] Another approach may attempt to achieve a compromise between the earliest available resource and the lowest excluded RSRP. For example, within a preconfigured number of slots (e.g., a window of T=5 slots), the UE may identify the resource with the lowest RSRP. In other words, if later resources (within a 5-slot window) with lower excluded RSRP can be selected, then selecting these resources may be acceptable.

[0105] For example, if TRP 1 has sufficient resources with ex RSRP=-70dBm at slot 3, and TRP2 has sufficient resources with ex RSRP=-90dBm at slot 7, the UE will select TRP2 for transmission even though the resources appear later because the TRP 2 resources have the lowest measured / heard RSRP in the 5-slot window (from slots 3-7). On the other hand, if TRP 1 has sufficient resources with ex RSRP=-70dBm at slot 3, and TRP2 does not have sufficient resources with ex RSRP=-90dBm until slot 9, the UE will select TRP1 for transmission because the TRP 2 resources are outside the 5-slot window starting at slot 3.

[0106] In some cases, when one TRP or a subset of TRPs is selected for transmission, another TRP may not transmit at all. In other cases, another TRP may be restricted to transmit on orthogonal time-frequency resources to avoid interfering with the transmission of other TRPs. In such cases, the TRP may be able to transmit at full power on orthogonal resources (eliminating the need for power control / interference management).

[0107] In some cases, retransmissions may be sent at a different TRP than the original / first transmission. This may apply to blind retransmissions (e.g., automatically sent without feedback to improve reliability) or back-to-back hybrid automatic repeat request (HARQ) retransmissions.

[0108] like Fig.13 As illustrated in , when the mTRP UE determines that the resources required for the retransmission are available at a different TRP (or set of TRPs) earlier than the initial TRP, a different TRP may be used for the retransmission. In the illustrated example, the first transmission is sent on TRP2 (using 4 PRBs in slots 1-2) and the retransmission is sent on TRP1 (using 4 PRBs in slot 4).

[0109] In some cases, the resource(s) reserved by the second TRP (TRP set) for retransmission may not be indicated in the SCI transmitted on the first TRP (TRP set). In such cases, other UEs may not perform any resource exclusion until the next SCI (indicating the reserved resources) is received. In other cases, resources may be indicated and / or excluded (together with RSRP-based exclusion) in the SCI transmitted on the first TRP. In one case, resources may be excluded based on the RSRP measured via the first TRP. In another case, additional protection such as RSRP+x dB may be indicated in the SCI of the resources, and these resources should be protected or excluded from use when the measurement via the first TRP is equal to or greater than RSRP+x dB. In yet another case, the SCI may indicate that resources are to be excluded regardless of RSRP (e.g., to help avoid conflicts and ensure successful transmission of high priority data).

[0110] In some cases, an mTRP UE may decide to transmit on multiple TRPs simultaneously. For example, when (sufficient) transmission resources are available on two (or more) TRPs simultaneously, both TRPs may be used for transmission. In such cases, for a given TB, two (or more) TRPs may have overlapping available resources, excluding RSRP restrictions.

[0111] like Fig.14 As explained in , in some cases, the total number of available resources on these TRPs may be different. In the illustrated example, the 2 PRBs selected for transmission on TRP1 overlap with the 4 PRBs selected for transmission on TRP2. In such cases, the two TRPs may transmit the same TBs, but map to different MCS values ​​(e.g., QPSK for TRP 2 and 16QAM for TRP1). In this case, the SCI of the two transmissions may indicate the corresponding MCS values. In some cases, the TRPs appropriately set their transmission power and / or beam direction in an effort to minimize interference.

[0112] At the receiving UE (which may support a single TRP or multiple TRPs), in some cases, if two transmissions are received, the receiving UE may only decode the one with the higher SINR / SCI-RSRP and ignore the other. In other cases, the receiving UE may decode both first. For example, the receiving UE may first decode the transmission with the higher MCS and store the decoded bits, log-likelihood ratio LLR values ​​(soft bits), or both bits and LLR values ​​if the decoding fails. The receiver may then decode the lower MCS transmission based on the stored decoded bits or stored LLR values ​​from the higher MCS transmission to enhance robustness.

[0113] like Fig.15As explained in , in some cases, retransmission resources may be indicated in all SCIs (for initial transmissions). When two TRPs find partially overlapping retransmission resources, as in the illustrated example, these resources may be indicated in the SCIs transmitted on both TRPs. At the receiving UE, resource exclusion may be performed based on the reservation information and the RSRP measured on the two SCIs.

[0114] In some cases, such as Fig.16 As illustrated in , the two TRPs may not find retransmission resources at the same location. In such a case, the mTRP UE may select the retransmission candidate based on some criteria (such as earlier or maximum allocation within the window). In the illustrated example, the UE selects the earlier occurring resources in TRP 2 for the first retransmission and selects the later occurring resources in TRP 1 for the second retransmission.

[0115] like Fig.16 As explained in , the SCI transmitted on one TRP (or TRP set) may indicate the retransmission resources used for the TRP (or TRP set). In such a case, the SCI transmitted on different TRPs may point to different retransmission resources corresponding to different retransmission opportunities (e.g., the SCI transmitted on TRP 2 points to the resources used for the first retransmission and the SCI transmitted on TRP 1 points to the resources used for the second retransmission).

[0116] At the receiving UE, resource exclusion at these retransmission opportunities may be based on the RSRP received from the corresponding TRP. Upon decoding the SCI on the first transmission and inferring the concurrent transmissions (on TRP1 and TRP2), the receiving UE may treat the retransmissions as consecutive retransmissions.

[0117] Example aspects

[0118] In addition to the above aspects, many aspects of specific combinations are also within the scope of the present disclosure, some of which are described in detail below:

[0119] Aspect 1: A method for wireless communication by a user equipment (UE), comprising: performing received signal power measurements at a first transmit receive point (TRP) of the UE and a second TRP of the UE; determining a candidate resource set from a resource pool for sidelink transmission based on the received signal power measurements performed at the first TRP and the second TRP; selecting resources for sidelink communication from the candidate resource set; and transmitting on the sidelink via at least one of the first TRP or the second TRP by using the selected resources.

[0120] Aspect 2: A method as in Aspect 1, wherein performing the received signal power measurement includes performing self-interference measurement by: transmitting on the first TRP while receiving on the second TRP; and transmitting on the second TRP while receiving on the first TRP.

[0121] Aspect 3: A method as in any of Aspects 1-2, wherein: the selection of the resources includes selecting resources for sidelink transmission only on one of the first TRP and the second TRP; and the transmission is performed only on the one TRP.

[0122] Aspect 4: The method of Aspect 3 further comprises: selecting one TRP for the transmission based on the fact that the one TRP has sufficient resources available for transmission earlier in time than resources available for transmission of another TRP.

[0123] Aspect 5: The method of Aspect 3 further comprises: selecting one TRP for the transmission based on that the one TRP has sufficient resources available for transmission earlier than the transmission of another TRP, and the sufficient resources satisfy the metric.

[0124] Aspect 6: A method as in any one of Aspects 1-5, wherein: the selection of the resources includes selecting a first resource set for transmission on the first TRP and selecting a second resource set for transmission on the second TRP; and the transmission is performed on the first TRP via the first resource set and on the second TRP via the second resource set.

[0125] Aspect 7: The method of Aspect 6, wherein the first resource set and the second resource set are orthogonal in at least one of frequency or time.

[0126] Aspect 8: A method as in Aspect 6, wherein the transmission comprises: a first transmission is performed on the first TRP via the first resource set; and a retransmission of the first transmission is performed on the second TRP via the second resource set.

[0127] Aspect 9: A method as in Aspect 8, wherein the second resource set used for the retransmission is indicated via sidelink control information (SCI) transmitted on the first TRP.

[0128] Aspect 10: The method of aspect 8, wherein the SCI indicates that the second resource set is to be excluded by a UE receiving the SCI regardless of measurements associated with the second resource set.

[0129] Aspect 11: The method of Aspect 6, wherein the first resource set and the second resource set at least partially overlap in time, frequency, or time and frequency.

[0130] Aspect 12: The method of any one of aspects 6 and 11, wherein the first resource set has a different number of resources than the second resource set.

[0131] Aspect 13: A method as in any one of Aspects 1-12, wherein: the same transport block (TB) is transmitted on the first TRP and the second TRP; the first TRP uses a first modulation and coding scheme (MCS) to transmit the TB via the first resource set; and the second TRP uses a second MCS to transmit the TB via the second resource set.

[0132] Aspect 14: A method as in Aspect 13, wherein: the side link control information (SCI) transmitted on the first TRP indicates the first MCS; and the SCI transmitted on the second TRP indicates the second MCS.

[0133] Aspect 15: The method of any one of Aspects 1-14, further comprising setting at least one of the transmit power or beam direction for transmissions on the first TRP and the second TRP based on the received signal power measurement.

[0134] Aspect 16: A method as in Aspect 6 or Aspect 11, wherein the transmission comprises: a first transmission is performed on the first TRP via the first resource set and on the second TRP via the second resource set; and a retransmission of the first transmission is performed on the first TRP via the first retransmission resource set and on the second TRP via the second retransmission resource set.

[0135] Aspect 17: A method as in Aspect 16, wherein: the first retransmission resource set and the second retransmission resource set at least partially overlap in time, frequency, or time and frequency; the first retransmission resource set is indicated via sidelink control information (SCI) transmitted on the first TRP; and the second retransmission resource set is indicated via the SCI transmitted on the second TRP.

[0136] Aspect 18: A method as in Aspect 16, wherein: the first retransmission resource set and the second retransmission resource set occupy different time resources corresponding to different retransmission opportunities; and the side link control information (SCI) is transmitted on the first TRP and the second TRP via the different retransmission resources corresponding to different retransmission opportunities.

[0137] Aspect 19: A method for wireless communication by a receiving user equipment (UE), comprising: receiving one or more sidelink control information (SCI) indicating resources for sidelink transmissions jointly scheduled at a first transmit reception point (TRP) and a second transmit reception point of the transmitting UE; and monitoring the indicated resources to search for the sidelink transmission.

[0138] Aspect 20: A method as in Aspect 19, wherein the one or more SCIs include: a first SCI indicating a first set of resources used for sidelink transmission from the first TRP; and a second SCI indicating a second set of resources used for sidelink transmission from the second TRP.

[0139] Aspect 21: The method of Aspect 20 further comprises: in a case where the receiving UE receives the sidelink transmission via both the first resource set and the second resource set, decoding the sidelink transmission received on only one of the first resource set and the second resource set.

[0140] Aspect 22: A method as in Aspect 20, wherein: the first SCI and the second SCI also indicate a first modulation and coding scheme (MCS) and a second modulation and coding scheme used for the sidelink transmission via the first resource set and the second resource set; and in the case where the receiving UE receives the sidelink transmission on both the first resource set and the second resource set, the method further includes attempting to decode the sidelink transmission sent using the higher of the first MCS and the second MCS.

[0141] Aspect 23: The method of Aspect 22 further includes, in the event that the attempt to decode the side link transmission sent using the higher of the first MCS and the second MCS fails: storing the decoded bits or log-likelihood ratios (LLRs) from the failed attempt; and attempting to decode the side link transmission sent using the lower of the first MCS and the second MCS based on the stored decoded bits or LLRs.

[0142] Aspect 24: A method as in any of Aspects 19-23, wherein the one or more SCIs also indicate retransmission resources for sidelink retransmissions scheduled on at least one of the first TRP or the second TRP of the transmitting UE.

[0143] Aspect 25: The method of Aspect 24, further comprising determining candidate resources for sidelink transmission based at least in part on the indicated retransmission resources.

[0144] Aspect 26: A method as in Aspect 24, wherein: the one or more SCIs further indicate measurements regarding reference signal received power (RSRP); and the method further includes determining candidate resources for sidelink transmission based on the indicated retransmission resources and the indicated measurements.

[0145] Aspect 27: A method as in Aspect 24, wherein: the one or more SCI indications that the indicated first retransmission resource set and the indicated second retransmission resource set from the first TRP and the second TRP correspond to different retransmission opportunities; and the method further includes determining resource exclusion at the different retransmission opportunities based on a reference signal received power (RSRP) measurement from the corresponding TRP.

[0146] Aspect 28: A method as in Aspect 24, wherein: the one or more SCI indications that the indicated first retransmission resource set and the indicated second retransmission resource set from the first TRP and the second TRP correspond to different retransmission timings; and the method further includes treating the retransmissions via the indicated first retransmission resource set and the indicated second retransmission resource set as consecutive retransmissions.

[0147] Aspect 29: A user equipment (UE), comprising means for performing the operations of one or more of aspects 1-18.

[0148] Aspect 30: A user equipment UE comprises a transceiver and a processing system, the processing system comprising at least one processor configured to perform operations as in one or more of aspects 1-18.

[0149] Aspect 31: An apparatus for wireless communication by a user equipment (UE), comprising: a processing system configured to: perform received signal power measurements at a first transmit receive point (TRP) of the UE and a second TRP of the UE, determine resources to be excluded from a resource pool for sidelink transmission based on the received signal power measurements performed at the first TRP and the second TRP; and select resources for sidelink communication from the resource pool based at least in part on the determination of the resources to be excluded; and an interface configured to output data for transmission on the sidelink via one or more of the first TRP and the second TRP using the selected resources.

[0150] Aspect 32: A computer-readable medium for wireless communications, comprising code executable by a device for: performing received signal power measurements at a first transmit receive point (TRP) of a UE and a second TRP of the UE; determining resources to be excluded from a resource pool for sidelink transmission based on the received signal power measurements performed at the first TRP and the second TRP; and selecting resources for sidelink communication from the resource pool based at least in part on the determination of the resources to be excluded; and transmitting on the sidelink via one or more of the first TRP and the second TRP using the selected resources.

[0151] Aspect 33: A receiving user equipment (UE), comprising means for performing the operations of one or more of aspects 19-28.

[0152] Aspect 34: A receiving user equipment UE, comprising a transceiver and a processing system, the processing system comprising at least one processor configured to perform operations as in one or more of aspects 19-28.

[0153] Aspect 35: An apparatus for wireless communication by a receiving user equipment (UE), comprising: an interface configured to obtain one or more sidelink control information (SCI) indicating resources for sidelink transmissions jointly scheduled at a first transmit reception point (TRP) and a second transmit reception point of the transmitting UE; and a processing system configured to monitor the indicated resources to search for the sidelink transmission.

[0154] Aspect 36: A computer-readable medium for wireless communications, comprising code executable by a device for: obtaining one or more sidelink control information (SCI) indicating resources for sidelink transmissions jointly scheduled at a first transmit reception point (TRP) and a second transmit reception point of a transmitting UE; and monitoring the indicated resources to search for the sidelink transmission.

[0155] Each method disclosed herein includes one or more steps or actions for implementing the method. These method steps and / or actions can be interchangeable with each other without departing from the scope of the claims. In other words, unless a specific order of steps or actions is specified, the order and / or use of specific steps and / or actions can be changed without departing from the scope of the claims.

[0156] As used herein, a phrase referring to "at least one of" a list of items refers to any combination of those items, including single members. As an example, "at least one of a, b, or c" is intended to cover: a, b, c, ab, ac, bc, and abc, as well as any combination with multiple identical elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other ordering of a, b, and c).

[0157] As used herein, the term "determining" encompasses a wide variety of actions. For example, "determining" may include calculating, computing, processing, deriving, investigating, searching (e.g., searching in a table, a database, or another data structure), ascertaining, and the like. Also, "determining" may include receiving (e.g., receiving information), accessing (e.g., accessing data in a memory), and the like. Also, "determining" may include resolving, selecting, choosing, establishing, and the like.

[0158] The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be easily understood by those skilled in the art, and the universal principles defined herein can be applied to other aspects. Thus, the claims are not intended to be limited to the various aspects shown herein, but should be granted the full scope consistent with the language of the claims, wherein the singular reference to the element is not intended to mean "there is and only one" (unless specifically stated) but "one or more". Unless specifically stated otherwise, the term "some" refers to one or more. The elements of the various aspects described throughout this disclosure are all structural and functional equivalents currently or hereafter known to ordinary technicians in the art and are explicitly incorporated herein by reference, and are intended to be covered by the claims. In addition, nothing disclosed herein is intended to be donated to the public, regardless of whether such disclosure is explicitly recorded in the claims. Any element of the claim should not be interpreted under the provisions of 35 U.S.C. § 112 (f), unless the element is explicitly stated using the phrase "device for..." or in the case of a method claim, the element is stated using the phrase "step for...".

[0159] The various operations of the methods described above may be performed by any suitable device capable of performing the corresponding functions. These devices may include various hardware and / or software components and / or modules, including but not limited to circuits, application specific integrated circuits (ASICs), or processors. In general, where there are operations illustrated in the figures, these operations may have corresponding paired device plus function components. For example, Fig.10 and 11 The various operations shown in Figure 4 The UE 120a may be executed by various processors shown in the figure, such as processors 466, 458, 464 and / or controller / processor 480 of the UE 120a.

[0160] The means for receiving may include Figure 4 The transceiver, receiver or at least one antenna and at least one receiving processor described in the embodiment. The device for transmitting, the device for sending or the device for outputting may include Figure 4The transceiver, transmitter or at least one antenna and at least one transmit processor illustrated in the embodiment of the present invention. The means for performing received signal power measurement, the means for determining, the means for selecting, the means for performing self-interference measurement, the means for monitoring, the means for decoding, the means for attempting, the means for storing, the means for treating retransmission and the means for setting may include a processing system, which may include one or more processors, such as Figure 4 1. The processors 458, 464, and 466 of the UE 120a and / or the controller / processor 480 and / or the processors 420, 430, 438 and / or the controller / processor 440 of the BS 110a are shown in FIG.

[0161] In some cases, a device may not actually transmit a frame, but may have an interface (means for outputting) for outputting a frame for transmission. For example, a processor may output a frame to a radio frequency (RF) front end via a bus interface for transmission. Similarly, a device may not actually receive a frame, but may have an interface (means for obtaining) for obtaining a frame received from another device. For example, a processor may obtain (or receive) a frame from an RF front end via a bus interface for reception.

[0162] The various illustrative logical blocks, modules, and circuits described in conjunction with the present disclosure may be implemented or executed with a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device (PLD), discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any commercially available processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

[0163] If implemented in hardware, an example hardware configuration may include a processing system in a wireless node. The processing system may be implemented using a bus architecture. Depending on the specific application and overall design constraints of the processing system, the bus may include any number of interconnecting buses and bridges. The bus may link together various circuits including a processor, a machine-readable medium, and a bus interface. The bus interface may be used to connect a network adapter, etc., to the processing system via the bus. The network adapter may be used to implement the signal processing functions of the PHY layer. In the user terminal 120 (see Figure 1), a user interface (e.g., a keypad, display, mouse, joystick, etc.) may also be connected to the bus. The bus may also link various other circuits, such as timing sources, peripherals, voltage regulators, power management circuits, and the like, which are well known in the art and will not be described further. The processor may be implemented with one or more general and / or special purpose processors. Examples include microprocessors, microcontrollers, DSP processors, and other circuit systems capable of executing software. Those skilled in the art will recognize how to best implement the functionality described with respect to the processing system, depending on the specific application and the overall design constraints imposed on the overall network or system.

[0164] If implemented in software, each function may be stored on or transmitted by a computer-readable medium as one or more instructions or codes. Software should be broadly interpreted to mean instructions, data, or any combination thereof, whether referred to as software, firmware, middleware, microcode, hardware description language, or other. Computer-readable media include both computer storage media and communication media, which include any media that facilitate the transfer of computer programs from one place to another. The processor may be responsible for managing the bus and general processing, including executing software modules stored on a machine-readable storage medium. A computer-readable storage medium may be coupled to a processor so that the processor can read and write information from / to the storage medium. In an alternative, a storage medium may be integrated into a processor. As an example, a machine-readable medium may include a transmission line, a carrier modulated by data, and / or a computer-readable storage medium having instructions stored thereon that is separated from a wireless node, all of which may be accessed by a processor through a bus interface. Alternatively or additionally, a machine-readable medium or any part thereof may be integrated into a processor, such as a cache and / or a general register file, which may be the case. As an example, examples of machine-readable storage media may include RAM (random access memory), flash memory, ROM (read only memory), PROM (programmable read only memory), EPROM (erasable programmable read only memory), EEPROM (electrically erasable programmable read only memory), registers, magnetic disks, optical disks, hard drives, or any other suitable storage media, or any combination thereof. Machine-readable media may be implemented in a computer program product.

[0165] A software module may include a single instruction, or many instructions, and may be distributed over several different code segments, between different programs, and across multiple storage media. A computer-readable medium may include multiple software modules. These software modules include instructions that cause a processing system to perform various functions when executed by an apparatus such as a processor. These software modules may include a transmission module and a reception module. Each software module may reside in a single storage device or may be distributed across multiple storage devices. As an example, when a triggering event occurs, a software module may be loaded into a RAM from a hard drive. During the execution of a software module, a processor may load some instructions into a cache to increase access speed. One or more cache lines may then be loaded into a general register file for execution by the processor. When describing the functionality of a software module as described below, it will be understood that such functionality is implemented by the processor when the processor executes instructions from the software module.

[0166] Likewise, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technology (such as infrared (IR), radio, and microwave), then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technology (such as infrared, radio, and microwave) is included in the definition of medium. Disk and disc, as used herein, include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk, and Disks, where disks often reproduce data magnetically, and discs reproduce data optically with lasers. Thus, in some aspects, computer-readable media may include non-transitory computer-readable media (e.g., tangible media). Additionally, for other aspects, computer-readable media may include transient computer-readable media (e.g., signals). Combinations of the above should also be included within the scope of computer-readable media.

[0167] Thus, some aspects may include a computer program product for performing the operations presented herein. For example, such a computer program product may include a computer-readable medium having stored (and / or encoded) thereon instructions that can be executed by one or more processors to perform the operations described herein. For example, a computer program product for performing the operations described herein and in Fig.10 and 11 Instructions for the operations explained in .

[0168] In addition, it should be appreciated that modules and / or other appropriate means for performing the methods and techniques described herein may be downloaded and / or otherwise obtained by a user terminal and / or base station where applicable. For example, such a device can be coupled to a server to facilitate the transfer of means for performing the methods described herein. Alternatively, the various methods described herein can be provided via a storage device (e.g., RAM, ROM, a physical storage medium such as a compact disc (CD) or a floppy disk, etc.) so that once the storage device is coupled to or provided to a user terminal and / or base station, the device can obtain the various methods. In addition, any other suitable technology suitable for providing the methods and techniques described herein to a device may be utilized.

[0169] It will be understood that the claims are not limited to the precise configuration and components illustrated above. Various changes, substitutions and variations may be made in the arrangement, operation and details of the methods and apparatus described above without departing from the scope of the claims.

Claims

1. A method for wireless communication by a user equipment (UE), include: transmitting on a first transmit-receive point (TRP) while receiving on a second TRP; receiving on the first TRP while transmitting on the second TRP, wherein the transmissions on the first TRP and the second TRP are used to identify a received signal power measurement, the received signal power measurement comprising a self-interference measurement of the first TRP and the second TRP; determining a set of candidate resources for at least the first TRP from a resource pool for sidelink transmission based on the received signal power measurements identified for the first TRP and the second TRP, including a self-interference measurement of the first TRP and a self-interference measurement of the second TRP; selecting the one of the first TRP or the second TRP for transmission based on one of the first TRP or the second TRP having sufficient resources available for transmission earlier in time than the other of the first TRP or the second TRP; selecting, from the set of candidate resources, resources for sidelink communication for the one of the first TRP or the second TRP; as well as Transmitting on the side link via the one of the first TRP or the second TRP using the selected resources.

2. The method of claim 1, wherein the one of the first TRP or the second TRP is selected for the transmission further based on the sufficient resources satisfying metric.

3. The method according to claim 1, in: The selecting of resources comprises selecting a first set of resources for transmission on the first TRP and selecting a second set of resources for transmission on the second TRP; and The transmission is performed on the first TRP via the first resource set and on the second TRP via the second resource set. 4 . The method of claim 3 , wherein the first set of resources and the second set of resources are orthogonal in at least one of frequency or time.

5. The method of claim 3, wherein the transmission include: A first transmission is performed on the first TRP via the first resource set; and Retransmission of the first transmission is performed on the second TRP via the second resource set.

6. The method of claim 5, wherein the second resource set used for the retransmission is indicated via sidelink control information (SCI) transmitted on the first TRP.

7. The method of claim 5, wherein the SCI indicates that a second set of resources is to be excluded by a UE receiving the SCI regardless of measurements associated with the second set of resources.

8. The method of claim 3, wherein the first resource and the second resource at least partially overlap in time, frequency, or time and frequency.

9. The method of claim 3, wherein the first set of resources has a different number of resources than the second set of resources.

10. The method according to claim 3, in: The same transport block (TB) is transmitted on the first TRP and the second TRP; The first TRP uses a first modulation and coding scheme (MCS) to transmit the TB via the first resource set; and The second TRP uses a second MCS to transmit the TB via the second resource set.

11. The method according to claim 10, in: Sidelink control information (SCI) transmitted on the first TRP indicates the first MCS; and The SCI transmitted on the second TRP indicates the second MCS.

12. The method of claim 1, further comprising setting at least one of a transmit power or a beam direction for transmissions on the first TRP and the second TRP based on the received signal power measurement.

13. The method of claim 3, wherein the transmission include: A first transmission is performed on the first TRP via the first set of resources and on the second TRP via the second set of resources; and Retransmission of the first transmission is performed on the first TRP via a first retransmission resource set and on the second TRP via a second retransmission resource set.

14. The method according to claim 13, in: The first retransmission resource set and the second retransmission resource set at least partially overlap in time, frequency, or time and frequency; The first retransmission resource set is indicated via sidelink control information (SCI) transmitted on the first TRP; and The second retransmission resource set is indicated via the SCI transmitted on the second TRP.

15. The method of claim 13, in: The first retransmission resource set and the second retransmission resource set occupy different time resources corresponding to different retransmission opportunities; and The first retransmission resource set and the second retransmission resource set are indicated by sidelink control information (SCI) transmitted on the first TRP and the second TRP via the different retransmission resources corresponding to the different retransmission opportunities.

16. A method for wireless communication by a receiving user equipment (UE), include: receiving one or more sidelink control information (SCI) indicating resources for sidelink transmissions jointly scheduled on a first transmit reception point (TRP) and a second transmit reception point of a transmitting UE, wherein the one or more SCIs include: a first SCI indicating a first resource set for retransmissions of the sidelink transmissions via the first TRP, and a second SCI indicating a second resource set for retransmissions of the sidelink transmissions via the second TRP, the first resource set being different from the second resource set, wherein the first resource set and the second resource set include at least partially overlapping resources, and wherein the first SCI and the second SCI indicate the at least partially overlapping resources based on the first resource set at least partially overlapping with the second resource set; and Monitor the indicated resources to look for the sidelink transmission, wherein the sidelink transmission is a joint transmission performed by the first TRP and the second TRP for the receiving UE, and wherein the joint transmission includes simultaneous transmission using the first and second TRPs.

17. The method of claim 16, further comprising: include: In a case where the receiving UE receives sidelink transmissions via both the first resource set and the second resource set, decoding the sidelink transmission received on only one of the first resource set and the second resource set.

18. The method of claim 16, in: The first SCI and the second SCI further indicate a first modulation and coding scheme (MCS) and a second modulation and coding scheme (MCS) for the sidelink transmission via the first resource set and the second resource set; and In the event that the receiving UE receives a sidelink transmission on both the first set of resources and the second set of resources, the method further includes attempting to decode the sidelink transmission sent using a higher of the first MCS and the second MCS.

19. The method of claim 18, further comprising, in an event that the attempt to decode the sidelink transmission sent using the higher of the first MCS and the second MCS fails: storing decoded bits or log-likelihood ratios (LLRs) from the failed attempts; and Attempting to decode the sidelink transmission sent using the lower of the first MCS and the second MCS based on the stored decoded bits or LLRs.

20. The method of claim 16, wherein the one or more SCIs also indicate retransmission resources for sidelink retransmissions scheduled on at least one of the first TRP or the second TRP of the transmitting UE.

21. The method of claim 20, further comprising determining candidate resources for sidelink transmission based at least in part on the indicated retransmission resources.

22. The method of claim 20, in: The one or more SCIs further indicate a measurement regarding Reference Signal Received Power (RSRP); and The method further includes determining candidate resources for sidelink transmission based on the indicated retransmission resources and the indicated measurements.

23. The method of claim 20, in: The one or more SCIs indicate that the indicated first retransmission resource set and the indicated second retransmission resource set from the first TRP and the second TRP correspond to different retransmission opportunities; and The method further includes determining resource exclusion at the different retransmission opportunities based on reference signal received power (RSRP) measurements from corresponding TRPs.

24. The method of claim 20, in: The one or more SCIs indicate that the indicated first retransmission resource set and the indicated second retransmission resource set from the first TRP and the second TRP correspond to different retransmission opportunities; and The method further includes considering retransmissions via the indicated first set of retransmission resources and the indicated second set of retransmission resources as consecutive retransmissions.

25. A user equipment (UE), include: A transmitter, the transmitter being configured to: transmitting on a first transmit-receive point (TRP) while receiving on a second TRP; receiving on the first TRP while transmitting on the second TRP, wherein the transmissions on the first TRP and the second TRP are used to identify a received signal power measurement, the received signal power measurement comprising a self-interference measurement of the first TRP and the second TRP; and a processing system, the processing system being configured to: determining a set of candidate resources for at least the first TRP from a resource pool for sidelink transmission based on the received signal power measurements identified for the first TRP and the second TRP, including a self-interference measurement of the first TRP and a self-interference measurement of the second TRP; selecting the one of the first TRP or the second TRP for transmission based on one of the first TRP or the second TRP having sufficient resources available for transmission earlier in time than the other of the first TRP or the second TRP; and selecting resources for sidelink communication for said one of said first TRP or said second TRP from said set of candidate resources, Wherein the transmitter is further configured to transmit on the side link via the one of the first TRP or the second TRP by using the selected resources.

26. The UE of claim 25, wherein the one of the first TRP or the second TRP is selected for the transmission further based on the sufficient resources satisfying metric.

27. The UE according to claim 25, in: The selecting of resources comprises selecting a first set of resources for transmission on the first TRP and selecting a second set of resources for transmission on the second TRP; and The transmission is performed on the first TRP via the first resource set and on the second TRP via the second resource set.

28. The UE of claim 27, wherein the first set of resources and the second set of resources are orthogonal in at least one of frequency or time.

29. The UE according to claim 27, wherein the transmission include: A first transmission is performed on the first TRP via the first resource set; and Retransmission of the first transmission is performed on the second TRP via the second resource set.

30. The UE of claim 29, wherein the second resource set used for the retransmission is indicated via sidelink control information (SCI) transmitted on the first TRP.

31. The UE of claim 29, wherein the SCI indicates that a second set of resources is to be excluded by a UE receiving the SCI regardless of measurements associated with the second set of resources.

32. The UE of claim 27, wherein the first resource and the second resource at least partially overlap in time, frequency, or time and frequency.

33. The UE of claim 27, wherein the first resource set has a different number of resources than the second resource set.

34. The UE according to claim 27, in: The same transport block (TB) is transmitted on the first TRP and the second TRP; The first TRP uses a first modulation and coding scheme (MCS) to transmit the TB via the first resource set; and The second TRP uses a second MCS to transmit the TB via the second resource set.

35. The UE according to claim 34, in: Sidelink control information (SCI) transmitted on the first TRP indicates the first MCS; and The SCI transmitted on the second TRP indicates the second MCS.

36. As described in claim 25, the processing system is further configured to set at least one of the transmission power or beam direction for the transmission on the first TRP and the second TRP based on the received signal power measurement.

37. The UE of claim 27, wherein the transmission include: A first transmission is performed on the first TRP via the first set of resources and on the second TRP via the second set of resources; and Retransmission of the first transmission is performed on the first TRP via a first retransmission resource set and on the second TRP via a second retransmission resource set.

38. The UE according to claim 37, in: The first retransmission resource set and the second retransmission resource set at least partially overlap in time, frequency, or time and frequency; The first retransmission resource set is indicated via sidelink control information (SCI) transmitted on the first TRP; and The second retransmission resource set is indicated via the SCI transmitted on the second TRP.

39. The UE according to claim 37, in: The first retransmission resource set and the second retransmission resource set occupy different time resources corresponding to different retransmission opportunities; and The first retransmission resource set and the second retransmission resource set are indicated by sidelink control information (SCI) transmitted on the first TRP and the second TRP via the different retransmission resources corresponding to the different retransmission opportunities.

40. A receiving user equipment (UE), include: A receiver configured to receive one or more sidelink control information (SCI) indicating resources for sidelink transmissions jointly scheduled on a first transmit reception point (TRP) and a second transmit reception point of a transmitting UE, wherein the one or more SCIs include: a first SCI indicating a first resource set for retransmissions of the sidelink transmissions via the first TRP, and a second SCI indicating a second resource set for retransmissions of the sidelink transmissions via the second TRP, the first resource set being different from the second resource set, wherein the first resource set and the second resource set include at least partially overlapping resources, and wherein the first SCI and the second SCI indicate the at least partially overlapping resources based on the first resource set at least partially overlapping with the second resource set; and A processing system configured to monitor the indicated resources for the sidelink transmission, wherein the sidelink transmission is a joint transmission performed by the first TRP and the second TRP for the receiving UE, and wherein the joint transmission includes simultaneous transmission using the first and second TRPs.

41. The receiving UE according to claim 40, in: In the event that the receiving UE receives a sidelink transmission via both the first set of resources and the second set of resources, the processing system is configured to decode the sidelink transmission received on only one of the first set of resources and the second set of resources.

42. The receiving UE according to claim 40, in: The first SCI and the second SCI further indicate a first modulation and coding scheme (MCS) and a second modulation and coding scheme for the sidelink transmission via the first resource set and the second resource set; and In the event that the receiving UE receives a sidelink transmission on both the first set of resources and the second set of resources, the processing system is configured to attempt to decode the sidelink transmission sent using a higher of the first MCS and the second MCS.

43. The receiving UE of claim 42, the processing system being configured to, if the attempt to decode the sidelink transmission sent using the higher of the first MCS and the second MCS fails: storing decoded bits or log-likelihood ratios (LLRs) from the failed attempts; and Attempting to decode the sidelink transmission sent using the lower of the first MCS and the second MCS based on the stored decoded bits or LLRs.

44. A receiving UE as described in claim 40, wherein the one or more SCIs also indicate retransmission resources for sidelink retransmissions scheduled on at least one of the first TRP or the second TRP of the transmitting UE.

45. The receiving UE of claim 44, the processing system configured to determine candidate resources for sidelink transmission based at least in part on the indicated retransmission resources.

46. ​​The receiving UE according to claim 44, in: The one or more SCIs further indicate a measurement regarding Reference Signal Received Power (RSRP); and The processing system is configured to determine candidate resources for sidelink transmission based on the indicated retransmission resources and the indicated measurements.

47. The receiving UE according to claim 44, in: The one or more SCIs indicate that the indicated first retransmission resource set and the indicated second retransmission resource set from the first TRP and the second TRP correspond to different retransmission opportunities; and The processing system is configured to determine resource exclusion at the different retransmission opportunities based on reference signal received power (RSRP) measurements from corresponding TRPs.

48. The receiving UE according to claim 44, in: The one or more SCIs indicate that the indicated first retransmission resource set and the indicated second retransmission resource set from the first TRP and the second TRP correspond to different retransmission opportunities; and The processing system is configured to consider retransmissions via the indicated first set of retransmission resources and the indicated second set of retransmission resources as consecutive retransmissions.

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