WO2022021120A1

WO2022021120A1 - Sidelink resource selection for a multiple transmitter-receiver point user equipment with application layer indicated directional bias

Info

Publication number: WO2022021120A1
Application number: PCT/CN2020/105415
Authority: WO
Inventors: Sourjya Dutta; Kapil Gulati; Junyi Li; Shuanshuan Wu; Hui Guo
Original assignee: Qualcomm Incorporated
Priority date: 2020-07-29
Filing date: 2020-07-29
Publication date: 2022-02-03

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine, using a resource exclusion procedure that is biased based at least in part on an indication of a directional bias, a set of available resources for a sidelink transmission. The UE may transmit the sidelink transmission using the set of available resources and at least one transmitter-receiver point (TRP) of a plurality of TRPs of the UE. Numerous other aspects are provided.

Description

SIDELINK RESOURCE SELECTION FOR A MULTIPLE TRANSMITTER-RECEIVER POINT USER EQUIPMENT WITH APPLICATION LAYER INDICATED DIRECTIONAL BIAS

FIELD OF THE DISCLOSURE

Aspects of the present disclosure generally relate to wireless communication and to techniques and apparatuses for sidelink resource selection for a multiple transmitter-receiver point user equipment with application layer indicated directional bias.

BACKGROUND

Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical 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, and/or the like) . Examples of such multiple-access technologies include 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, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE) . LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP) .

A wireless network may include a number of base stations (BSs) that can support communication for a number of user equipment (UEs) . A user equipment (UE) may communicate with a base station (BS) via the downlink and uplink. The downlink (or forward link) refers to the communication link from the BS to the UE, and the uplink (or reverse link) refers to the communication link from the UE to the BS. As will be described in more detail herein, a BS may be referred to as a Node B, a gNB, an access point (AP) , a radio head, a transmit receive point (TRP) , a New Radio (NR) BS, a 5G Node B, and/or the like.

The above multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different user equipment to communicate on a municipal, national, regional, and even global level. New Radio (NR) , which may also be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP) . NR is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink (DL) , using CP-OFDM and/or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM) ) on the uplink (UL) , as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. As the demand for mobile broadband access continues to increase, further improvements in LTE, NR, and other radio access technologies remain useful.

SUMMARY

In some aspects, a method of wireless communication performed by a user equipment (UE) includes: determining, using a resource exclusion procedure that is biased based at least in part on an indication of a directional bias, a set of available resources for a sidelink transmission; and transmitting the sidelink transmission using the set of available resources and at least one transmitter-receiver point (TRP) of a plurality of TRPs of the UE.

In some aspects, a UE for wireless communication includes: a memory; and one or more processors operatively coupled to the memory, the memory and the one or more processors configured to determine, using a resource exclusion procedure that is biased based at least in part on an indication of a directional bias, a set of available resources for a sidelink transmission; and transmit the sidelink transmission using the set of available resources and at least one TRP of a plurality of TRPs of the UE.

In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes: one or more instructions that, when executed by one or more processors of a UE, cause the UE to determine, using a resource exclusion procedure that is biased based at least in part on an indication of a directional bias, a set of available resources for a sidelink transmission; and transmit the sidelink transmission using the set of available resources and at least one TRP of a plurality of TRPs of the UE.

In some aspects, an apparatus for wireless communication includes: means for determining, using a resource exclusion procedure that is biased based at least in part on an indication of a directional bias, a set of available resources for a sidelink transmission; and means for transmitting the sidelink transmission using the set of available resources and at least one TRP of a plurality of TRPs of the apparatus.

Aspects generally include a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, wireless communication device, and/or processing system as substantially described herein with reference to and as illustrated by the drawings and specification.

The foregoing has outlined rather broadly the features and technical advantages of examples according to the disclosure in order that the detailed description that follows may be better understood. Additional features and advantages will be described hereinafter. The conception and specific examples disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. Characteristics of the concepts disclosed herein, both their organization and method of operation, together with associated advantages will be better understood from the following description when considered in connection with the accompanying figures. Each of the figures is provided for the purposes of illustration and description, and not as a definition of the limits of the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

So that the above-recited features of the present disclosure can be understood in detail, a more particular description, briefly summarized above, may be had by reference to aspects, some of which are illustrated in the appended drawings. It is to be noted, however, that the appended drawings illustrate only certain typical aspects of this disclosure and are therefore not to be considered limiting of its scope, for the description may admit to other equally effective aspects. The same reference numbers in different drawings may identify the same or similar elements.

Fig. 1 is a diagram illustrating an example of a wireless network, in accordance with various aspects of the present disclosure.

Fig. 2 is a diagram illustrating an example of a base station in communication with a UE in a wireless network, in accordance with various aspects of the present disclosure.

Fig. 3 is a diagram illustrating an example of sidelink communications, in accordance with various aspects of the present disclosure.

Fig. 4 is a diagram illustrating an example of sidelink communications and access link communications, in accordance with various aspects of the present disclosure.

Fig. 5 is a diagram illustrating an example of sidelink communications including a multiple transmitter-receiver point (mTRP) UE, in accordance with various aspects of the present disclosure.

Fig. 6 is a diagram illustrating an example associated with sidelink resource selection for an mTRP UE with application layer indicated directional bias, in accordance with various aspects of the present disclosure.

Fig. 7 is a diagram illustrating an example process associated with sidelink resource selection for an mTRP UE with application layer indicated directional bias, in accordance with various aspects of the present disclosure.

DETAILED DESCRIPTION

Various aspects of the disclosure are described more fully hereinafter with reference to the accompanying drawings. This disclosure may, however, be embodied in many different forms and should not be construed as limited to any specific structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Based on the teachings herein, one skilled in the art should appreciate that the scope of the disclosure is intended to cover any aspect of the disclosure disclosed herein, whether implemented independently of or combined with any other aspect of the disclosure. For example, an apparatus may be implemented or a method may be practiced using any number of the aspects set forth herein. In addition, the scope of the disclosure is intended to cover such an apparatus or method which is practiced using other structure, functionality, or structure and functionality in addition to or other than the various aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of a claim.

Several aspects of telecommunication systems will now be presented with reference to various apparatuses and techniques. These apparatuses and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, and/or the like (collectively referred to as “elements” ) . These elements may be implemented using hardware, software, or combinations thereof. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.

It should be noted that while aspects may be described herein using terminology commonly associated with a 5G or NR radio access technology (RAT) , aspects of the present disclosure can be applied to other RATs, such as a 3G RAT, a 4G RAT, and/or a RAT subsequent to 5G (e.g., 6G) .

Fig. 1 is a diagram illustrating an example of a wireless network 100, in accordance with various aspects of the present disclosure. The wireless network 100 may be or may include elements of a 5G (NR) network, an LTE network, and/or the like. The wireless network 100 may include a number of base stations 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A base station (BS) is an entity that communicates with user equipment (UEs) and may also be referred to as an NR BS, a Node B, a gNB, a 5G node B (NB) , an access point, a transmit receive point (TRP) , and/or the like. Each BS may provide communication coverage for a particular geographic area. In 3GPP, the term “cell” can refer to a coverage area of a BS and/or a BS subsystem serving this coverage area, depending on the context in which the term is used.

A BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and/or another type of cell. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscription. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscription. A femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs having association with the femto cell (e.g., UEs in a closed subscriber group (CSG) ) . A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS. In the example shown in Fig. 1, a BS 110a may be a macro BS for a macro cell 102a, a BS 110b may be a pico BS for a pico cell 102b, and a BS 110c may be a femto BS for a femto cell 102c. A BS may support one or multiple (e.g., three) cells. The terms “eNB” , “base station” , “NR BS” , “gNB” , “TRP” , “AP” , “node B” , “5G NB” , and “cell” may be used interchangeably herein.

In some aspects, a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a mobile BS. In some aspects, the BSs may be interconnected to one another and/or to one or more other BSs or network nodes (not shown) in the wireless network 100 through various types of backhaul interfaces such as a direct physical connection, a virtual network, and/or the like using any suitable transport network.

Wireless network 100 may also include relay stations. A relay station is an entity that can receive a transmission of data from an upstream station (e.g., a BS or a UE) and send a transmission of the data to a downstream station (e.g., a UE or a BS) . A relay station may also be a UE that can relay transmissions for other UEs. In the example shown in Fig. 1, a relay BS 110d may communicate with macro BS 110a and a UE 120d in order to facilitate communication between BS 110a and UE 120d. A relay BS may also be referred to as a relay station, a relay base station, a relay, and/or the like.

Wireless network 100 may be a heterogeneous network that includes BSs of different types, e.g., macro BSs, pico BSs, femto BSs, relay BSs, and/or the like. These different types of BSs may have different transmit power levels, different coverage areas, and different impacts on interference in wireless network 100. For example, macro BSs may have a high transmit power level (e.g., 5 to 40 watts) whereas pico BSs, femto BSs, and relay BSs may have lower transmit power levels (e.g., 0.1 to 2 watts) .

A network controller 130 may couple to a set of BSs and may provide coordination and control for these BSs. Network controller 130 may communicate with the BSs via a backhaul. The BSs may also communicate with one another, e.g., directly or indirectly via a wireless or wireline backhaul.

UEs 120 (e.g., 120a, 120b, 120c) may be dispersed throughout wireless network 100, and each UE may be stationary or mobile. A UE may also be referred to as an access terminal, a terminal, a mobile station, a subscriber unit, a station, and/or the like. A UE may be a cellular phone (e.g., a smart phone) , a personal digital assistant (PDA) , a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, biometric sensors/devices, wearable devices (smart watches, smart clothing, smart glasses, smart wrist bands, smart jewelry (e.g., smart ring, smart bracelet) ) , an entertainment device (e.g., a music or video device, or a satellite radio) , a vehicular component or sensor, smart meters/sensors, industrial manufacturing equipment, a global positioning system device, or any other suitable device that is configured to communicate via a wireless or wired medium.

Some UEs may be considered machine-type communication (MTC) or evolved or enhanced machine-type communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, and/or the like, that may communicate with a base station, another device (e.g., remote device) , or some other entity. A wireless node may provide, for example, connectivity for or to a network (e.g., a wide area network such as Internet or a cellular network) via a wired or wireless communication link. Some UEs may be considered Internet-of-Things (IoT) devices, and/or may be implemented as NB-IoT (narrowband internet of things) devices. Some UEs may be considered a Customer Premises Equipment (CPE) . UE 120 may be included inside a housing that houses components of UE 120, such as processor components, memory components, and/or the like. In some aspects, the processor components and the memory components may be coupled together. For example, the processor components (e.g., one or more processors) and the memory components (e.g., a memory) may be operatively coupled, communicatively coupled, electronically coupled, electrically coupled, and/or the like.

In general, any number of wireless networks may be deployed in a given geographic area. Each wireless network may support a particular RAT and may operate on one or more frequencies. A RAT may also be referred to as a radio technology, an air interface, and/or the like. A frequency may also be referred to as a carrier, a frequency channel, and/or the like. Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.

In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly using one or more sidelink channels (e.g., without using a base station 110 as an intermediary to communicate with one another) . For example, the UEs 120 may communicate using peer-to-peer (P2P) communications, device-to-device (D2D) communications, a vehicle-to-everything (V2X) protocol (e.g., which may include a vehicle-to-vehicle (V2V) protocol, a vehicle-to-infrastructure (V2I) protocol, vehicle-to-pedestrian (V2P) , and/or the like) , a mesh network, and/or the like. In this case, the UE 120 may perform scheduling operations, resource selection operations, and/or other operations described elsewhere herein as being performed by the base station 110.

Devices of wireless network 100 may communicate using the electromagnetic spectrum, which may be subdivided based on frequency or wavelength into various classes, bands, channels, and/or the like. For example, devices of wireless network 100 may communicate using an operating band having a first frequency range (FR1) , which may span from 410 MHz to 7.125 GHz, and/or may communicate using an operating band having a second frequency range (FR2) , which may span from 24.25 GHz to 52.6 GHz. The frequencies between FR1 and FR2 are sometimes referred to as mid-band frequencies. Although a portion of FR1 is greater than 6 GHz, FR1 is often referred to as a “sub-6 GHz” band. Similarly, FR2 is often referred to as a “millimeter wave” band despite being different from the extremely high frequency (EHF) band (30 GHz –300 GHz) which is identified by the International Telecommunications Union (ITU) as a “millimeter wave” band. Thus, unless specifically stated otherwise, it should be understood that the term “sub-6 GHz” or the like, if used herein, may broadly represent frequencies less than 6 GHz, frequencies within FR1, and/or mid-band frequencies (e.g., greater than 7.125 GHz) . Similarly, unless specifically stated otherwise, it should be understood that the term “millimeter wave” or the like, if used herein, may broadly represent frequencies within the EHF band, frequencies within FR2, and/or mid-band frequencies (e.g., less than 24.25 GHz) . It is contemplated that the frequencies included in FR1 and FR2 may be modified, and techniques described herein are applicable to those modified frequency ranges.

As indicated above, Fig. 1 is provided as an example. Other examples may differ from what is described with regard to Fig. 1.

Fig. 2 is a diagram illustrating an example 200 of a base station 110 in communication with a UE 120 in a wireless network 100, in accordance with various aspects of the present disclosure. Base station 110 may be equipped with T antennas 234a through 234t, and UE 120 may be equipped with R antennas 252a through 252r, where in general T ≥ 1 and R ≥ 1.

At base station 110, a transmit processor 220 may receive data from a data source 212 for one or more UEs, select one or more modulation and coding schemes (MCS) for each UE based at least in part on channel quality indicators (CQIs) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS (s) selected for the UE, and provide data symbols for all UEs. Transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI) and/or the like) and control information (e.g., CQI requests, grants, upper layer signaling, and/or the like) and provide overhead symbols and control symbols. Transmit processor 220 may also generate reference symbols for reference signals (e.g., a cell-specific reference signal (CRS) , a demodulation reference signal (DMRS) , and/or the like) and synchronization signals (e.g., the primary synchronization signal (PSS) and secondary synchronization signal (SSS) ) . A transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, the overhead symbols, and/or the reference symbols, if applicable, and may provide T output symbol streams to T modulators (MODs) 232a through 232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM and/or the like) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. T downlink signals from modulators 232a through 232t may be transmitted via T antennas 234a through 234t, respectively.

At UE 120, antennas 252a through 252r may receive the downlink signals from base station 110 and/or other base stations and may provide received signals to demodulators (DEMODs) 254a through 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM and/or the like) to obtain received symbols. A MIMO detector 256 may obtain received symbols from all R demodulators 254a through 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols. A receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to a data sink 260, and provide decoded control information and system information to a controller/processor 280. The term "controller/processor" may refer to one or more controllers, one or more processors, or a combination thereof. A channel processor may determine reference signal received power (RSRP) , received signal strength indicator (RSSI) , reference signal received quality (RSRQ) , channel quality indicator (CQI) , and/or the like. In some aspects, one or more components of UE 120 may be included in a housing 284.

Network controller 130 may include communication unit 294, controller/processor 290, and memory 292. Network controller 130 may include, for example, one or more devices in a core network. Network controller 130 may communicate with base station 110 via communication unit 294.

On the uplink, at UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information (e.g., for reports that include RSRP, RSSI, RSRQ, CQI, and/or the like) from controller/processor 280. Transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, and/or the like) , and transmitted to base station 110. In some aspects, the UE 120 includes a transceiver. The transceiver may include any combination of antenna (s) 252, modulators and/or demodulators 254, MIMO detector 256, receive processor 258, transmit processor 264, and/or TX MIMO processor 266. The transceiver may be used by a processor (e.g., controller/processor 280) and memory 282 to perform aspects of any of the methods described herein, for example, as described with reference to Figs. 6-7.

At base station 110, the uplink signals from UE 120 and other UEs may be received by antennas 234, processed by demodulators 232, detected by a MIMO detector 236 if applicable, and further processed by a receive processor 238 to obtain decoded data and control information sent by UE 120. Receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to controller/processor 240. Base station 110 may include communication unit 244 and communicate to network controller 130 via communication unit 244. Base station 110 may include a scheduler 246 to schedule UEs 120 for downlink and/or uplink communications. In some aspects, the base station 110 includes a transceiver. The transceiver may include any combination of antenna (s) 234, modulators and/or demodulators 232, MIMO detector 236, receive processor 238, transmit processor 220, and/or TX MIMO processor 230. The transceiver may be used by a processor (e.g., controller/processor 240) and memory 242 to perform aspects of any of the methods described herein, for example, as described with reference to Figs. 6-7.

Controller/processor 240 of base station 110, controller/processor 280 of UE 120, and/or any other component (s) of Fig. 2 may perform one or more techniques associated with sidelink resource selection for a multiple transmitter-receiver point (mTRP) UE with application layer indicated directional bias, as described in more detail elsewhere herein. For example, controller/processor 240 of base station 110, controller/processor 280 of UE 120, and/or any other component (s) of Fig. 2 may perform or direct operations of, for example, process 700 of Fig. 7 and/or other processes as described herein.

Memories

242 and 282 may store data and program codes for base station 110 and UE 120, respectively. In some aspects, memory 242 and/or memory 282 may include a non-transitory computer-readable medium storing one or more instructions (e.g., code, program code, and/or the like) for wireless communication. For example, the one or more instructions, when executed (e.g., directly, or after compiling, converting, interpreting, and/or the like) by one or more processors of the base station 110 and/or the UE 120, may cause the one or more processors, the UE 120, and/or the base station 110 to perform or direct operations of, for example, process 700 of Fig. 7 and/or other processes as described herein. In some aspects, executing instructions may include running the instructions, converting the instructions, compiling the instructions, interpreting the instructions, and/or the like.

In some aspects, UE 120 may include means for determining, using a resource exclusion procedure that is biased based at least in part on an indication of a directional bias, a set of available resources for a sidelink transmission, means for transmitting the sidelink transmission using the set of available resources and at least one transmitter-receiver point (TRP) of a plurality of TRPs of the UE, and/or the like. In some aspects, such means may include one or more components of UE 120 described in connection with Fig. 2, such as controller/processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, and/or the like.

While blocks in Fig. 2 are illustrated as distinct components, the functions described above with respect to the blocks may be implemented in a single hardware, software, or combination component or in various combinations of components. For example, the functions described with respect to the transmit processor 264, the receive processor 258, and/or the TX MIMO processor 266 may be performed by or under the control of controller/processor 280.

As indicated above, Fig. 2 is provided as an example. Other examples may differ from what is described with regard to Fig. 2.

Fig. 3 is a diagram illustrating an example 300 of sidelink communications, in accordance with various aspects of the present disclosure.

As shown in Fig. 3, a first UE 305-1 may communicate with a second UE 305-2 (and one or more other UEs 305) via one or more sidelink channels 310. The UEs 305-1 and 305-2 may communicate using the one or more sidelink channels 310 for P2P communications, D2D communications, V2X communications (e.g., which may include V2V communications, V2I communications, V2P communications, and/or the like) , mesh networking, and/or the like. In some aspects, the UEs 305 (e.g., UE 305-1 and/or UE 305-2) may correspond to one or more other UEs described elsewhere herein, such as UE 120. In some aspects, the one or more sidelink channels 310 may use a PC5 interface and/or may operate in a high frequency band (e.g., the 5.9 GHz band) . Additionally, or alternatively, the UEs 305 may synchronize timing of transmission time intervals (TTIs) (e.g., frames, subframes, slots, symbols, and/or the like) using global navigation satellite system (GNSS) timing.

As further shown in Fig. 3, the one or more sidelink channels 310 may include a physical sidelink control channel (PSCCH) 315, a physical sidelink shared channel (PSSCH) 320, and/or a physical sidelink feedback channel (PSFCH) 325. The PSCCH 315 may be used to communicate control information, similar to a physical downlink control channel (PDCCH) and/or a physical uplink control channel (PUCCH) used for cellular communications with a base station 110 via an access link or an access channel. The PSSCH 320 may be used to communicate data, similar to a physical downlink shared channel (PDSCH) and/or a physical uplink shared channel (PUSCH) used for cellular communications with a base station 110 via an access link or an access channel. For example, the PSCCH 315 may carry sidelink control information (SCI) 330, which may indicate various control information used for sidelink communications, such as one or more resources (e.g., time resources, frequency resources, spatial resources, and/or the like) where a transport block (TB) 335 may be carried on the PSSCH 320. The TB 335 may include data. The PSFCH 325 may be used to communicate sidelink feedback 340, such as hybrid automatic repeat request (HARQ) feedback (e.g., acknowledgement or negative acknowledgement (ACK/NACK) information) , transmit power control (TPC) , a scheduling request (SR) , and/or the like.

In some aspects, the one or more sidelink channels 310 may use resource pools. For example, a scheduling assignment (e.g., included in SCI 330) may be transmitted in sub-channels using specific resource blocks (RBs) across time. In some aspects, data transmissions (e.g., on the PSSCH 320) associated with a scheduling assignment may occupy adjacent RBs in the same subframe as the scheduling assignment (e.g., using frequency division multiplexing) . In some aspects, a scheduling assignment and associated data transmissions are not transmitted on adjacent RBs.

In some aspects, a UE 305 may operate using a transmission mode where resource selection and/or scheduling is performed by the UE 305 (e.g., rather than a base station 110) . In some aspects, the UE 305 may perform resource selection and/or scheduling by sensing channel availability for transmissions. For example, the UE 305 may measure a received signal strength indicator (RSSI) parameter (e.g., a sidelink-RSSI (S-RSSI) parameter) associated with various sidelink channels, may measure a reference signal received power (RSRP) parameter (e.g., a PSSCH-RSRP parameter) associated with various sidelink channels, may measure a reference signal received quality (RSRQ) parameter (e.g., a PSSCH-RSRQ parameter) associated with various sidelink channels, and/or the like, and may select a channel for transmission of a sidelink communication based at least in part on the measurement (s) .

Additionally, or alternatively, the UE 305 may perform resource selection and/or scheduling using SCI 330 received in the PSCCH 315, which may indicate occupied resources, channel parameters, and/or the like. Additionally, or alternatively, the UE 305 may perform resource selection and/or scheduling by determining a channel busy rate (CBR) associated with various sidelink channels, which may be used for rate control (e.g., by indicating a maximum number of resource blocks that the UE 305 can use for a particular set of subframes) .

In the transmission mode where resource selection and/or scheduling is performed by a UE 305, the UE 305 may generate sidelink grants, and may transmit the grants in SCI 330. A sidelink grant may indicate, for example, one or more parameters (e.g., transmission parameters) to be used for an upcoming sidelink transmission, such as one or more resource blocks to be used for the upcoming sidelink transmission on the PSSCH 320 (e.g., for TBs 335) , one or more subframes to be used for the upcoming sidelink transmission, a modulation and coding scheme (MCS) to be used for the upcoming sidelink transmission, and/or the like. In some aspects, a UE 305 may generate a sidelink grant that indicates one or more parameters for semi-persistent scheduling (SPS) , such as a periodicity of a sidelink transmission. Additionally, or alternatively, the UE 305 may generate a sidelink grant for event-driven scheduling, such as for an on-demand sidelink message.

As indicated above, Fig. 3 is provided as an example. Other examples may differ from what is described with respect to Fig. 3.

Fig. 4 is a diagram illustrating an example 400 of sidelink communications and access link communications, in accordance with various aspects of the present disclosure.

As shown in Fig. 4, a transmitter (Tx) /receiver (Rx) UE 405 and an Rx/Tx UE 410 may communicate with one another via a sidelink, as described above in connection with Fig. 3. As further shown, in some sidelink modes, a base station 110 may communicate with the Tx/Rx UE 405 via a first access link. Additionally, or alternatively, in some sidelink modes, the base station 110 may communicate with the Rx/Tx UE 410 via a second access link. The Tx/Rx UE 405 and/or the Rx/Tx UE 410 may correspond to one or more UEs described elsewhere herein, such as the UE 120 of Fig. 1. Thus, a direct link between UEs 120 (e.g., via a PC5 interface) may be referred to as a sidelink, and a direct link between a base station 110 and a UE 120 (e.g., via a Uu interface) may be referred to as an access link. Sidelink communications may be transmitted via the sidelink, and access link communications may be transmitted via the access link. An access link communication may be either a downlink communication (from a base station 110 to a UE 120) or an uplink communication (from a UE 120 to a base station 110) .

As indicated above, Fig. 4 is provided as an example. Other examples may differ from what is described with respect to Fig. 4.

Fig. 5 is a diagram illustrating an example 500 of sidelink communications including an mTRP UE 505, in accordance with various aspects of the present disclosure. As shown, the mTRP UE 505, a UE 510, and a UE 515 may communicate with one another. The UEs 505, 510, and 515 may communicate using sidelink communications.

The UEs 505, 510, and/or 515 may be, be similar to, include, or be included in a UE or UEs as described herein (e.g., UE 120 shown in Fig. 1) . In some aspects, the mTRP UE 505 may be, include, or be included in a vehicle (as shown) , a trailer, and/or the like. As shown, the UE 510 and/or the UE 515 may be, include, or be included in a vehicle (as shown) , a trailer, and/or the like. In some aspects, the UE 510 and/or the UE 515 may be an mTRP UE. In some aspects, the mTRP UE 505 may communicate with additional UEs not depicted in Fig. 5.

As shown in Fig. 5, the mTRP UE 505 may include a first TRP 520, a second TRP 525, and a controller 530. In some aspects, for example, a car may have front and rear antenna panels. These antenna panels may be TRPs. In some aspects, the mTRP UE 505 may include additional TRPs (not shown in Fig. 5) . In some aspects, the controller 530 may include hardware and/or software that controls the first TRP 520 and the second TRP 525. For example, in some aspects, the controller 530 may include one or more processing components, one or more control components, one or more storage components, and/or the like, such as one or more components shown in Fig. 2 (e.g., the DEMOD/MOD 254a…254r, the MIMO detector 256, the receive processor 258, the data sink 260, the data source 262, the transmit processor 264, the TX MIMO processor 266, the controller/processor 280, the memory 282, and/or the like) . In some aspects, the TRP 520 and the TRP 525 may include respective RF components such as analog RF transmitter and/or receiver components, digital processing components, and/or the like, such as one or more components shown in Fig. 2 (e.g., the antennas 252a…252r, the DEMOD/MOD 254a…254r, the MIMO detector 256, the receive processor 258, the data sink 260, the data source 262, the transmit processor 264, the TX MIMO processor 266, the controller/processor 280, the memory 282, and/or the like) .

In some aspects, TRPs on a vehicle may be spatially separated from one another. For example, in some aspects, a front TRP on a car may be separated from a rear TRP on the car by approximately 3 meters, 4 meters, and/or the like. A front TRP on a 16-wheel trailer may be separated from a rear TRP on the trailer by approximately 20 meters. As a result of any amount of separation, a sidelink communication channel may appear differently to one TRP than to another TRP of the same UE. That is, for example, a first TRP may experience a different signal quality than a second TRP, a different signal power than the second TRP, a different noise and/or interference level than the second TRP, and/or the like. These differences may be caused by a difference in distance from a device (e.g., UE) with which the TRPs are communicating, lack of line of sight (LoS) with respect to one of the TRPs, signals blocking (e.g., by obstructions in the environment such as other UEs, vehicles, buildings, hills, and/or the like) .

For some types of communications, it may be useful to prioritize certain directions (e.g., to prioritize a transmission from a first TRP higher than the transmission from a second TRP) . In some cases, for example, when making a turn, a vehicle UE may prioritize notifying UEs behind the vehicle over notifying UEs in front of the vehicle. In another example, if a roadblock is detected in front of a vehicle, it may be more useful to notify UEs behind the vehicle than to notify UEs in front of the vehicle. In some aspects, a vehicle may be accelerating, in which case it may be more useful to provide position and motion information to UEs in front of the vehicle than to provide position and motion information to UEs behind the vehicle.

In some cases, simply turning off one or more TRPs may be a simple solution, but this may not be workable in many cases as it may lead to increased collisions, and/or the like. For example, as shown in Fig. 5, the mTRP UE 505 may transmit motion information to the UE 510. If the transmission is performed using only the first TRP 520, the UE 515 may not receive the transmission and, as a result, may not receive an accompanying SCI transmission that indicates reservation of a sidelink resource. As a result, the UE 515 may reserve the sidelink resource in the future, causing a collision between a future transmission 535 by the mTRP UE 505 and a future transmission 540 by the UE 515. This may result in reduced reliability, signal quality, and/or the like.

Some aspects of techniques and apparatuses described herein may facilitate sidelink resource selection for an mTRP UE with application layer indicated directional bias. In some aspects, an mTRP UE may determine a set of available resources for a sidelink transmission using a resource exclusion procedure that is biased based at least in part on an indication of a directional bias. The indication may indicate a bias in favor of a particular TRP or TRPs. In some aspects, the indication may be provided to a physical layer of the mTRP by an application layer. In some aspects, the indication may indicate a direction, one or more TRPs, and/or the like. In some aspects, the one or more TRPs in favor of which transmission is to be biased may be explicitly indicated in the indication, directly derived from the application, indirectly derived from the indication, and/or the like.

In some aspects, the mTRP UE may bias sensing and/or resource exclusion in favor of the one or more TRPs. In this way, resources may be selected to facilitate transmitting to any number of different UEs, emphasizing transmission directions that are indicated as important (via the indication of bias) . In some aspects, the mTRP UE may perform a power control procedure in which the mTRP UE increases or decreases the transmission power of one or more TRPs relative to one or more other TRPs. In this way, techniques and apparatuses described herein may further facilitate emphasizing indicated transmission directions. In some aspects, control channel transmissions may be transmitted from multiple TRPs at the same power, while data channel transmissions are not. In this way, aspects may facilitate emphasizing indicated transmission directions while still facilitating providing SCI information to all nearby receiving devices, thereby facilitating avoidance of unnecessary communication collisions.

As indicated above, Fig. 5 is provided as an example. Other examples may differ from what is described with respect to Fig. 5.

Fig. 6 is a diagram illustrating an example 600 associated with sidelink resource selection for an mTRP UE with application layer indicated directional bias, in accordance with various aspects of the present disclosure. As shown, an mTRP UE 605 and a UE 610 may communicate with one another. In some aspects, the MTRP UE 605 may be, be similar to, include, or be included in the UE 120 shown in Figs. 1 and 2, the mTRP UE 505 shown in Fig. 5, and/or the like. In some aspects, the UE 610 may be, be similar to, include, or be included in the UE 120 shown in Figs. 1 and 2, the UE 510 shown in Fig. 5, the UE 515 shown in Fig. 5, and/or the like.

As shown by reference number 615, the UE 610 may transmit, and the mTRP UE 605 may receive, a physical sidelink control channel (PSCCH) transmission. The PSCCH transmission may include sidelink control information (SCI) . The mTRP UE 605 may decode the PSCCH transmission to extract the SCI. In some aspects, the mTRP UE 605 may use the SCI to facilitate resource selection.

As shown by reference number 620, the mTRP UE 605 may generate resource maps for the TRPs. In some aspects, for example, a first resource map 625 may correspond to a first TRP (shown as “TRP-1” in Fig. 6) and a second resource map 630 may correspond to a second TRP (shown as “TRP-2” in Fig. 6) . In some aspects, additional resource maps may be generated corresponding to additional TRPs. As shown, a resource map (e.g., the first resource map 625, the second resource map 630, and/or the like) may indicate a set of potentially available resources (shown as “R1, R2, ..., R8” ) . In some aspects, the set of potentially available resources may include time domain resources, frequency domain resources, and/or the like.

The resource maps 625 and 630 may indicate a characteristic associated with a resource element. For example, as shown in Fig. 6, the resource maps 625 and 630 may be conceptualized as a number of boxes arranged in columns representing resource elements and rows representing associated TRPs. A number may be included within a box of the conceptualization that represents a measurement corresponding to a resource element indicated by the column of the box and obtained using a TRP indicated by the row of the box. In some aspects, a resource map corresponding to a TRP may be stored, by the mTRP UE 605, as a bitmap, table, and/or the like. In some aspects, the mTRP UE 605 may store a first resource map 625 associated with a first TRP (TRP-1) , a second resource map 630 associated with a second TRP (TRP-2) , and/or the like.

For example, in some aspects, the mTRP UE 605 may obtain, using the first TRP, a first reference signal received power (RSRP) measurement corresponding to at least one resource. In some aspects, the mTRP UE 605 may obtain an RSRP measurement corresponding to a resource based at least in part on the extracted SCI. RSRP measurements may be used for resource exclusion because RSRP measurements provide information about potential interference on a channel. That is, for example, if an SCI associated with a particular sidelink resource is received with a relatively high RSRP, the mTRP UE 605 may conclude that the UE from which that SCI is received is transmitting at a high power, from within a relatively close range, and/or the like.

As shown, the mTRP UE 605 may obtain, using the first TRP (TRP-1) , an RSRP measurement of -97 decibel-milliwatts (dBm) corresponding to R1, as represented by the number in the box in the first row and first column. In some aspects, although an RSRP measurement is a measurement of power and, thus, might generally be expressed in terms of milliwatts (mW) , -dBm may be used to express RSRP measurements for clarity. A negative decibel-milliwatt represents small but positive numbers on a logarithmic scale, thus making the numbers easier to understand and more useful for calculation. The value indicated represents a negative exponent so that, for example, 0 dBm equals 1 mW of power, -10 dBm equals 0.1 mW, -20 dBm equals 0.01 mW, and so on. Thus, the closer the RSRP measurement is to 0, the higher the RSRP (and, thus, the interference on the corresponding channel) is. As a result, for example, an RSRP measurement of -45 represents a higher RSRP (and a higher level of interference) than an RSRP measurement of -75.

As shown in Fig. 6, the mTRP UE 605 may obtain, using the first TRP (TRP-1) , an RSRP measurement of -91 dBm corresponding to R2, an RSRP measurement of -89 dBm corresponding to R3, an RSRP measurement of -55 dBm corresponding to R4, an RSRP measurement of -80 dBm corresponding to R5, an RSRP measurement of -94 dBm corresponding to R6, an RSRP measurement of -75 dBm corresponding to R7, and an RSRP measurement of -75 dBm corresponding to R8. Similarly, the mTRP UE 605 may obtain, using the second TRP (TRP-2) , an RSRP measurement of -97 dBm corresponding to R1, an RSRP measurement of -77 dBm corresponding to R2, an RSRP measurement of -80 dBm corresponding to R3, an RSRP measurement of -70 dBm corresponding to R4, an RSRP measurement of -90 dBm corresponding to R5, an RSRP measurement of -75 dBm corresponding to R6, an RSRP measurement of -99 dBm corresponding to R7, and an RSRP measurement of -80 dBm corresponding to R8. The obtained RSRP measurements may be stored in the corresponding resource maps 625, 630.

As shown by reference number 635, the mTRP UE 605 may determine a set of available resources for a sidelink transmission. In some aspects, the set of available resources may include time domain resources, frequency domain resources, and/or the like. In some aspects, the mTRP UE 605 may determine the set of available resources using a resource exclusion procedure. In some aspects, the resource exclusion procedure may be biased based at least in part on an indication of a directional bias. In some aspects, the indication may indicate a direction (e.g., North, South, East, West, Northwest, Southeast, Northeast, Southwest, right, left, up, down, and/or the like) , a TRP (e.g., TRP-1, TRP-2, and/or the like) , and/or the like. In some aspects, the mTRP UE 605 may receive the indication from an application layer of the mTRP UE 605 (e.g., by a physical (PHY) layer, a medium access control (MAC) layer, and/or the like) .

In some aspects, the indication may include a tag associated with a data packet that is to be transmitted in accordance with the indicated bias. In some aspects, the mTRP UE 605 (e.g., a PHY layer of the mTRP UE 605, a MAC layer of the mTRP UE 605, and/or the like) may receive the tag from the application layer of the UE. In some aspects, the mTRP UE 605 may determine the tag based at least in part on a channel sensing measurement (e.g., an RSRP measurement, a reference signal received quality (RSRQ) measurement, and/or the like) , position information associated with the UE, and/or the like.

In some aspects, the resource exclusion procedure may include an iterative procedure in which RSRP measurements are compared to RSRP thresholds for resource exclusion. An RSRP measurement may satisfy an RSRP threshold if the RSRP measurement is lower than or equal to the RSRP threshold. If an RSRP measurement satisfies an RSRP threshold, the resource corresponding to the RSRP measurement may be included in a set of available resources. If the RSRP measurement fails to satisfy the RSRP threshold, the corresponding resource may be excluded. Excluded resources may be considered in a subsequent iteration in which the corresponding RSRP measurement is compared to an updated threshold. In some aspects, resource exclusion associated with an mTRP UE may include comparing a set of RSRP measurements corresponding to a resource to an RSRP threshold or to a set of respective RSRP thresholds. The RSRP measurements of the set of RSRP measurements may be obtained by the different TRPs.

As shown by reference number 640, the mTRP UE 605 may perform the resource exclusion procedure by associating a first RSRP threshold, ρ1, with the first TRP (TRP-1) . In some aspects, the mTRP UE 605 may associate a second RSRP threshold, ρ2, with the second TRP (TRP-2) . The mTRP UE 605 may set the threshold values based at least in part on the directional bias indication. For example, if the indication indicates the first TRP (TRP-1) , the mTRP UE 605 may set the first RSRP threshold to be stricter than the second RSRP threshold. A stricter RSRP threshold is an RSRP threshold that is satisfied by a lower maximum RSRP measurement than a maximum RSRP measurement that satisfies an RSRP threshold that is less strict (or relaxed) .

For example, as shown by reference number 640, in a first iteration of the resource exclusion procedure, the first RSRP threshold, ρ1, may be set to -99 dBm and the second RSRP threshold, ρ2, may be set to -79 dBm. The first RSRP threshold may be said to be stricter than the second RSRP threshold because a maximum RSRP measurement that satisfies the first RSRP threshold is equal to -99 dBm, which is lower than the maximum RSRP measurement, -79 dBm, that satisfies the second RSRP threshold. In this way, the mTRP UE 605 may bias resource selection based at least in part on the directional indication by setting a stricter RSRP threshold corresponding to the TRP indicated by the indication. In some aspects, the first RSRP threshold may include a biased threshold, and the second RSRP threshold may include a default threshold. In some aspects, the first RSRP threshold may include a default threshold, and the second RSRP threshold may include a relaxed threshold.

In some aspects, the resource exclusion procedure for an mTRP UE 605 includes determining whether at least one resource of the set of potentially available resources satisfies the first RSRP threshold and the second RSRP threshold. For example, as shown by reference number 640, there is not a resource for which the corresponding RSRP measurements satisfy both respective thresholds. As a result, no resource is included based on the first iteration (all of the resources are excluded) . As shown by reference number 645, the RSRP thresholds may be updated by an RSRP exclusion step size, and the RSRP measurements may be compared to the updated RSRP thresholds. In some aspects, as shown, the first RSRP threshold and the second RSRP threshold may be updated (increased) by the same step size (e.g., a step size of -3 dBm as shown in Fig. 6) . In some aspects, a different step size may be used to update the respective RSRP thresholds. As shown by reference number 645, the RSRP measurement corresponding to R1 obtained by TRP-1 satisfies the updated first RSRP threshold and the RSRP measurement corresponding to R1 obtained by TRP-2 satisfies the updated second RSRP threshold. Thus, R1 may be included (not excluded) , as shown. Similarly, as shown by reference number 650, R6 may be included based at least in part on updated RSRP thresholds associated with a third iteration of the procedure.

In some aspects, the resource exclusion procedure may include a stopping condition. The stopping condition may be a number of available resources. For example, in some aspects, the resource exclusion procedure may be terminated based at least in part on a specified number of resources being included in the set of available resources (e.g., two, three, four, and/or the like) . In some aspects, the resource exclusion procedure may be terminated based at least in part on a maximum RSRP threshold or thresholds being reached. In some aspects, the resource exclusion procedure may be terminated based on a maximum number of iterations.

As shown by reference number 655, the mTRP UE 605 may transmit the sidelink transmission using the set of available resources and at least one TRP. In some aspects, the mTRP UE 605 may transmit the sidelink transmission at a first transmission power using the first TRP and at a second transmission power using the second TRP. In some aspects, the first transmission power may be greater than the second transmission power. In some aspects, the first transmission power may include a default transmission power and the second transmission power may include a reduced transmission power. In this way, the mTRP UE 605 may use transmission power to further bias a sidelink transmission with respect to an indicated TRP. In some aspects, the mTRP UE 605 may transmit an SCI message associated with the sidelink transmission at the first transmission power using the first TRP and at the first transmission power using the second TRP. In this way, though a data transmission may be directionally biased based on transmission power, control channel signals may be transmitted at the same or similar power to facilitate receipt, by additional receiving UEs, of the control channel signals, which may, for example, indicate resource reservations. As a result, aspects may facilitate reducing potential communication collisions.

As indicated above, Fig. 6 is provided as an example. Other examples may differ from what is described with respect to Fig. 6.

Fig. 7 is a diagram illustrating an example process 700 performed, for example, by a UE, in accordance with various aspects of the present disclosure. Example process 700 is an example where the UE (e.g., UE 120 and/or the like) performs operations associated with sidelink resource selection for an mTRP UE with application layer indicated directional bias.

As shown in Fig. 7, in some aspects, process 700 may include determining, using a resource exclusion procedure that is biased based at least in part on an indication of a directional bias, a set of available resources for a sidelink transmission (block 710) . For example, the UE (e.g., using receive processor 258, transmit processor 264, controller/processor 280, memory 282, and/or the like) may determine, using a resource exclusion procedure that is biased based at least in part on an indication of a directional bias, a set of available resources for a sidelink transmission, as described above.

As further shown in Fig. 7, in some aspects, process 700 may include transmitting the sidelink transmission using the set of available resources and at least one TRP of a plurality of TRPs of the UE (block 720) . For example, the UE (e.g., using transmit processor 264, controller/processor 280, memory 282, and/or the like) may transmit the sidelink transmission using the set of available resources and at least one TRP of a plurality of TRPs of the UE, as described above.

Process 700 may include additional aspects, such as any single aspect or any combination of aspects described below and/or in connection with one or more other processes described elsewhere herein.

In a first aspect, process 700 includes receiving the indication from an application layer of the UE.

In a second aspect, alone or in combination with the first aspect, the indication comprises a tag associated with a data packet.

In a third aspect, alone or in combination with one or more of the first and second aspects, process 700 includes receiving the tag from an application layer of the UE.

In a fourth aspect, alone or in combination with one or more of the first through third aspects, process 700 includes determining the tag based at least in part on at least: a channel sensing measurement, position information associated with the UE, or some combination thereof.

In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, the indication indicates the at least one TRP.

In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, process 700 includes generating a plurality of resource maps for the plurality of TRPs, wherein a first resource map of the plurality of resource maps corresponds to a first TRP of the plurality of TRPs and a second resource map of the plurality of TRPs corresponds to a second TRP of the plurality of TRPs.

In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, process 700 includes decoding a PSCCH transmission to extract SCI, where generating the plurality of resource maps comprises generating the plurality of resource maps based at least in part on the SCI.

In an eighth aspect, alone or in combination with one or more of the first through seventh aspects, determining the set of available resources comprises performing the resource exclusion procedure, and where performing the resource exclusion procedure comprises obtaining, using the first TRP, a first RSRP measurement corresponding to at least one resource of a set of potentially available resources; obtaining, using the second TRP, a second RSRP measurement corresponding to the at least one resource of the set of potentially available resources; storing the first RSRP measurement in the first resource map; and storing the second RSRP measurement in the second resource map.

In a ninth aspect, alone or in combination with one or more of the first through eighth aspects, determining the set of available resources is based at least in part on the first resource map and the second resource map.

In a tenth aspect, alone or in combination with one or more of the first through ninth aspects, the indication indicates the first TRP, and performing the resource exclusion procedure comprises associating a first RSRP threshold for resource exclusion with the first TRP; and associating a second RSRP threshold for resource exclusion with the second TRP, where the first RSRP threshold is stricter than the second RSRP threshold.

In an eleventh aspect, alone or in combination with one or more of the first through tenth aspects, the first RSRP threshold comprises a biased threshold and the second RSRP threshold comprises a default threshold.

In a twelfth aspect, alone or in combination with one or more of the first through eleventh aspects, the first RSRP threshold comprises a default threshold and the second RSRP threshold comprises a relaxed threshold.

In a thirteenth aspect, alone or in combination with one or more of the first through twelfth aspects, determining the set of available resources comprises determining that at least one resource of a set of potentially available resources satisfies the first RSRP threshold; determining that the at least one resource satisfies the second RSRP threshold; and including the at least one resource in the set of available resources based at least in part on determining that the at least one resource satisfies the first and second RSRP thresholds.

In a fourteenth aspect, alone or in combination with one or more of the first through thirteenth aspects, the resource exclusion procedure comprises an iterative procedure including a plurality of iterations, and performing the resource exclusion procedure comprises performing a first iteration based at least in part on the first RSRP threshold and the second RSRP threshold; updating, based on a threshold step size, the first RSRP threshold to a third RSRP threshold; updating, based on the threshold step size, the second RSRP threshold to a fourth RSRP threshold; and performing a second iteration based at least in part on the third RSRP threshold and the fourth RSRP threshold.

In a fifteenth aspect, alone or in combination with one or more of the first through fourteenth aspects, performing the resource exclusion comprises associating a first maximum RSRP threshold for resource exclusion with the first TRP; and associating a second maximum RSRP threshold for resource exclusion with the second TRP, where the second maximum RSRP threshold is less than the first maximum RSRP threshold.

In a sixteenth aspect, alone or in combination with one or more of the first through fifteenth aspects, transmitting the sidelink transmission further comprises transmitting the sidelink transmission at a first transmission power using a first TRP of the plurality of TRPs; and transmitting the sidelink transmission at a second transmission power using a second TRP of the plurality of TRPs, wherein the first transmission power is greater than the second transmission power.

In a seventeenth aspect, alone or in combination with one or more of the first through sixteenth aspects, the first transmission power comprises a default transmission power and the second transmission power comprises a reduced transmission power.

In an eighteenth aspect, alone or in combination with one or more of the first through seventeenth aspects, transmitting the sidelink transmission further comprises transmitting an SCI message associated with the sidelink transmission at the first transmission power using the first TRP; and transmitting the SCI message at the first transmission power using the second TRP.

In a nineteenth aspect, alone or in combination with one or more of the first through eighteenth aspects, the set of available resources comprises at least a time domain resource, a frequency domain resource, or some combination thereof.

Although Fig. 7 shows example blocks of process 700, in some aspects, process 700 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 7. Additionally, or alternatively, two or more of the blocks of process 700 may be performed in parallel.

The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise form disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired from practice of the aspects.

As used herein, the term “component” is intended to be broadly construed as hardware, firmware, and/or a combination of hardware and software. As used herein, a processor is implemented in hardware, firmware, and/or a combination of hardware and software. It will be apparent that systems and/or methods described herein may be implemented in different forms of hardware, firmware, and/or a combination of hardware and software. The actual specialized control hardware or software code used to implement these systems and/or methods is not limiting of the aspects. Thus, the operation and behavior of the systems and/or methods were described herein without reference to specific software code-it being understood that software and hardware can be designed to implement the systems and/or methods based, at least in part, on the description herein.

As used herein, satisfying a threshold may, depending on the context, refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, and/or the like.

Even though particular combinations of features are recited in the claims and/or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. In fact, many of these features may be combined in ways not specifically recited in the claims and/or disclosed in the specification. Although each dependent claim listed below may directly depend on only one claim, the disclosure of various aspects includes each dependent claim in combination with every other claim in the claim set. 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, a-b, a-c, b-c, and a-b-c, as well as any combination with multiples of the same element (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c or any other ordering of a, b, and c) .

No element, act, or instruction used herein should be construed as critical or essential unless explicitly described as such. Also, as used herein, the articles “a” and “an” are intended to include one or more items and may be used interchangeably with “one or more. ” Further, as used herein, the article “the” is intended to include one or more items referenced in connection with the article “the” and may be used interchangeably with “the one or more. ” Furthermore, as used herein, the terms “set” and “group” are intended to include one or more items (e.g., related items, unrelated items, a combination of related and unrelated items, and/or the like) , and may be used interchangeably with “one or more. ” Where only one item is intended, the phrase “only one” or similar language is used. Also, as used herein, the terms “has, ” “have, ” “having, ” and/or the like are intended to be open-ended terms. Further, the phrase “based on” is intended to mean “based, at least in part, on” unless explicitly stated otherwise. Also, as used herein, the term “or” is intended to be inclusive when used in a series and may be used interchangeably with “and/or, ” unless explicitly stated otherwise (e.g., if used in combination with “either” or “only one of” ) .

Claims

A method of wireless communication performed by a user equipment (UE) , comprising:

determining, using a resource exclusion procedure that is biased based at least in part on an indication of a directional bias, a set of available resources for a sidelink transmission; and

transmitting the sidelink transmission using the set of available resources and at least one transmitter-receiver point (TRP) of a plurality of TRPs of the UE.
The method of claim 1, further comprising receiving the indication from an application layer of the UE.
The method of claim 1, wherein the indication comprises a tag associated with a data packet.
The method of claim 3, further comprising receiving the tag from an application layer of the UE.
The method of claim 3, further comprising determining the tag based at least in part on at least:

a channel sensing measurement,

position information associated with the UE, or

some combination thereof.
The method of claim 1, wherein the indication indicates the at least one TRP.
The method of claim 1, further comprising generating a plurality of resource maps for the plurality of TRPs, wherein a first resource map of the plurality of resource maps corresponds to a first TRP of the plurality of TRPs and a second resource map of the plurality of TRPs corresponds to a second TRP of the plurality of TRPs.
The method of claim 7, further comprising decoding a physical sidelink control channel transmission to extract sidelink control information (SCI) ,

wherein generating the plurality of resource maps comprises generating the plurality of resource maps based at least in part on the SCI.
The method of claim 7, wherein determining the set of available resources comprises performing the resource exclusion procedure, and wherein performing the resource exclusion procedure comprises:

obtaining, using the first TRP, a first reference signal received power (RSRP) measurement corresponding to at least one resource of a set of potentially available resources;

obtaining, using the second TRP, a second RSRP measurement corresponding to the at least one resource of the set of potentially available resources;

storing the first RSRP measurement in the first resource map; and

storing the second RSRP measurement in the second resource map.
The method of claim 7, wherein determining the set of available resources is based at least in part on the first resource map and the second resource map.
The method of claim 7, wherein the indication indicates the first TRP, and

wherein performing the resource exclusion procedure comprises:

associating a first RSRP threshold for resource exclusion with the first TRP; and

associating a second RSRP threshold for resource exclusion with the second TRP, wherein the first RSRP threshold is stricter than the second RSRP threshold.
The method of claim 11, wherein the first RSRP threshold comprises a biased threshold, and

wherein the second RSRP threshold comprises a default threshold.
The method of claim 11, wherein the first RSRP threshold comprises a default threshold, and

wherein the second RSRP threshold comprises a relaxed threshold.
The method of claim 11, wherein determining the set of available resources comprises:

determining that at least one resource of a set of potentially available resources satisfies the first RSRP threshold;

determining that the at least one resource satisfies the second RSRP threshold; and

including the at least one resource in the set of available resources based at least in part on determining that the at least one resource satisfies the first and second RSRP thresholds.
The method of claim 11, wherein the resource exclusion procedure comprises an iterative procedure including a plurality of iterations, and wherein performing the resource exclusion procedure comprises:

performing a first iteration based at least in part on the first RSRP threshold and the second RSRP threshold;

updating, based on a threshold step size, the first RSRP threshold to a third RSRP threshold;

updating, based on the threshold step size, the second RSRP threshold to a fourth RSRP threshold; and

performing a second iteration based at least in part on the third RSRP threshold and the fourth RSRP threshold.
The method of claim 11, wherein performing the resource exclusion comprises:

associating a first maximum RSRP threshold for resource exclusion with the first TRP; and

associating a second maximum RSRP threshold for resource exclusion with the second TRP, wherein the second maximum RSRP threshold is less than the first maximum RSRP threshold.
The method of claim 1, wherein transmitting the sidelink transmission further comprises:

transmitting the sidelink transmission at a first transmission power using a first TRP of the plurality of TRPs; and

transmitting the sidelink transmission at a second transmission power using a second TRP of the plurality of TRPs, wherein the first transmission power is greater than the second transmission power.
The method of claim 17, wherein the first transmission power comprises a default transmission power and the second transmission power comprises a reduced transmission power.
The method of claim 17, wherein transmitting the sidelink transmission further comprises:

transmitting a sidelink control information (SCI) message associated with the sidelink transmission at the first transmission power using the first TRP; and

transmitting the SCI message at the first transmission power using the second TRP.
The method of claim 1, the set of available resources comprising at least:

a time domain resource,

a frequency domain resource, or

some combination thereof.
A user equipment (UE) for wireless communication, comprising:

a memory; and

one or more processors operatively coupled to the memory, the memory and the one or more processors configured to:

determine, using a resource exclusion procedure that is biased based at least in part on an indication of a directional bias, a set of available resources for a sidelink transmission; and

transmit the sidelink transmission using the set of available resources and at least one transmitter-receiver point (TRP) of a plurality of TRPs of the UE.
A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising:

one or more instructions that, when executed by one or more processors of a user equipment (UE) , cause the UE to:

determine, using a resource exclusion procedure that is biased based at least in part on an indication of a directional bias, a set of available resources for a sidelink transmission; and

transmit the sidelink transmission using the set of available resources and at least one transmitter-receiver point (TRP) of a plurality of TRPs of the UE.
An apparatus for wireless communication, comprising:

means for determining, using a resource exclusion procedure that is biased based at least in part on an indication of a directional bias, a set of available resources for a sidelink transmission; and

means for transmitting the sidelink transmission using the set of available resources and at least one transmitter-receiver point (TRP) of a plurality of TRPs of the apparatus.