Sidelink resource information signaling for sidelink resource selection

Abstract

Aspects of the disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) can receive a message from a second UE via a sidelink interface. The UE can transmit, to the second UE, sidelink information of sidelink resources available to the second UE, where the sidelink resource information is based at least in part on a measured power level associated with the message received from the second UE. Numerous other aspects are provided.

Description

[0001] Cross-references to related applications

[0002] This patent application claims priority to U.S. Provisional Patent Application No. 62 / 706,303, filed August 7, 2020, entitled “SIDELINK RESOURCE INFORMATION SIGNALING FOR SIDELINK RESOURCE SELECTION,” and U.S. Non-Provisional Patent Application No. 17 / 444,361, filed August 3, 2021, entitled “SIDELINK RESOURCE INFORMATION SIGNALING FOR SIDELINK RESOURCE SELECTION,” which are expressly incorporated herein by reference. Technical Field

[0003] Various aspects of this disclosure generally relate to technologies and apparatus for wireless communication and sidelink resource information signaling for sidelink resource selection. Background Technology

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunications services, such as telephone, video, data, messaging, and broadcasting. Typical wireless communication systems employ multiple access technologies that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). 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 issued by the 3rd Generation Partnership Project (3GPP).

[0005] A wireless network may include one or more base stations that support communication between a user equipment (UE) or multiple UEs. A UE may communicate with a base station via downlink and uplink communication. "Downlink" (or "DL") refers to the communication link from the base station to the UE, and "uplink" (or "UL") refers to the communication link from the UE to the base station.

[0006] The aforementioned multiple access technologies have been adopted in various telecommunications standards to provide a common protocol enabling different UEs to communicate at the city, country, regional, and / or global levels. New Radio (NR), often referred to as 5G, is a set of enhancements to the LTE mobile standard issued by 3GPP. NR is designed to better support mobile broadband internet access by using Orthogonal Frequency Division Multiplexing (OFDM) with a Cyclic Prefix (CP) (CP-OFDM) on the downlink, and CP-OFDM and / or Single Carrier Frequency Division Multiplexing (SC-FDM) (also known as Discrete Fourier Transform Extended OFDM (DFT-s-OFDM)) on the uplink, as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technologies and carrier aggregation to improve spectral efficiency, reduce costs, improve service, utilize new spectrum, and better integrate with other open standards. As the demand for mobile broadband access continues to increase, further improvements to LTE, NR, and other radio access technologies remain useful. Summary of the Invention

[0007] In some aspects, a method of wireless communication performed by a first user equipment (UE) includes: receiving a message from a second UE via a sidelink interface; and sending sidelink resource information of sidelink resources available to the second UE to the second UE, wherein the sidelink resource information is based at least in part on a measured power level associated with the message received from the second UE.

[0008] In some aspects, a method of wireless communication performed by a first UE includes: sending a message to a second UE via a sidelink interface; receiving sidelink resource information of sidelink resources available to the first UE from the second UE, wherein the sidelink resource information is based at least in part on a measured power level associated with the message received by the second UE; and sending an inter-UE coordination signal to the second UE on a sidelink resource selected at least in part based on the sidelink resource information.

[0009] In some aspects, a first UE for wireless communication includes: a memory; and one or more processors coupled to the memory, configured to: receive messages from a second UE via a sidelink interface; and transmit sidelink resource information of sidelink resources available to the second UE, wherein the sidelink resource information is based at least in part on a measured power level associated with a message received from the second UE.

[0010] In some aspects, a first UE for wireless communication includes: a memory; and one or more processors coupled to the memory, configured to: send messages to a second UE via a sidelink interface; receive sidelink resource information of sidelink resources available to the first UE from the second UE, wherein the sidelink resource information is based at least in part on a measured power level associated with a message received by a third UE; and send inter-UE coordination signals to the second UE on sidelink resources selected at least in part based on the sidelink resource information.

[0011] In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes: one or more instructions, when executed by one or more processors of a first UE, causing the first UE to: receive a message from a second UE via a sidelink interface; and send sidelink resource information of sidelink resources available to the second UE, wherein the sidelink resource information is based at least in part on a measured power level associated with the message received from the second UE.

[0012] In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes: one or more instructions, which, when executed by one or more processors of a first UE, cause the first UE to: send a message to a second UE via a sidelink interface; receive sidelink resource information of sidelink resources available to the first UE from the second UE, wherein the sidelink resource information is based at least in part on a measured power level associated with the message received by the second UE; and send an inter-UE coordination signal to the second UE on a sidelink resource selected at least in part based on the sidelink resource information.

[0013] In some aspects, a first device for wireless communication includes: components for receiving messages from a second device via a sidelink interface; and components for transmitting sidelink resource information of sidelink resources available to the second device, wherein the sidelink resource information is based at least in part on a measured power level associated with the message received from the second device.

[0014] In some aspects, a first device for wireless communication includes: components for transmitting a message to a second device via a sidelink interface; components for receiving sidelink resource information of sidelink resources available to the first device from the second device, wherein the sidelink resource information is based at least in part on a measured power level associated with the message received by the second device; and components for transmitting an inter-UE coordination signal to the second device on a sidelink resource selected at least in part based on the sidelink resource information.

[0015] The aspects generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication equipment and / or processing systems as substantially described herein with reference to the accompanying drawings and description.

[0016] The features and technical advantages of the examples according to this disclosure have been outlined quite extensively above to facilitate a better understanding of the detailed description that follows. Additional features and advantages will be described below. The disclosed concepts and specific examples can be readily used as the basis for modifying or designing other structures for achieving the same purpose as this disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The features of the concepts disclosed herein, their organization and operation, and related advantages will be better understood from the following description when considered in conjunction with the accompanying drawings. Each figure provided is for illustration and description and not as a definition of limitation by the claims.

[0017] While aspects are described herein by way of example, those skilled in the art will understand that these aspects can be implemented in many different arrangements and scenarios. The techniques described herein can be implemented using different platform types, devices, systems, shapes, sizes, and / or package arrangements. For example, some aspects can be implemented by integrated chip embodiments or other devices based on non-modular components (e.g., end-user devices, vehicles, communication devices, computing devices, industrial devices, retail / purchasing devices, medical devices, and / or artificial intelligence devices). Aspects can be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components, and / or system-level components. Devices incorporating the described aspects and features may include additional components and features for implementing and practicing the claimed and described aspects. For example, the transmission and reception of wireless signals may include one or more components for analog and digital purposes (e.g., hardware components including antennas, radio frequency (RF) chains, power amplifiers, modulators, buffers, processors, interleavers, adders, and / or summers). It is contemplated that the aspects described herein can be practiced in devices, components, systems, distributed arrangements, and / or end-user devices of various sizes, shapes, and configurations. Attached Figure Description

[0018] To gain a more detailed understanding of the features of this disclosure, reference can be made to some aspects illustrated in the accompanying drawings, which have been briefly summarized above. However, it should be noted that the drawings illustrate only some typical aspects of this disclosure and should not be considered as limiting its scope, as the description may allow for other equivalent effects. The same reference numerals in different drawings may identify the same or similar elements.

[0019] Figure 1 This is a diagram illustrating an example of a wireless network according to the present disclosure.

[0020] Figure 2 This is a diagram illustrating an example of communication between a base station and a user equipment (UE) in a wireless network according to the present disclosure.

[0021] Figure 3 This is a diagram illustrating an example of sidelink communication according to this disclosure.

[0022] Figure 4 This is a diagram illustrating examples of sidelink communication and access link communication according to this disclosure.

[0023] Figure 5 This is a diagram illustrating an example of coordination signaling according to this disclosure.

[0024] Figure 6 This is a diagram illustrating an example of inter-UE coordination signaling according to this disclosure.

[0025] Figure 7 This is a diagram illustrating an example of resource conflict for inter-UE coordination signaling according to this disclosure.

[0026] Figure 8 This is a diagram illustrating an example of sidelink resource information signaling associated with sidelink resource selection according to this disclosure.

[0027] Figures 9-10 This is a diagram illustrating an example processing associated with sidelink resource information signaling for sidelink resource selection according to this disclosure. Detailed Implementation

[0028] Various aspects of this disclosure will be described more fully below with reference to the accompanying drawings. However, this disclosure may be embodied in many different forms and should not be construed as limited to any particular structure or function throughout this disclosure. Rather, these aspects are provided to make this disclosure thorough and complete and to fully communicate the scope of this disclosure to those skilled in the art. Those skilled in the art will understand that the scope of this disclosure is intended to cover any aspect disclosed herein, whether implemented independently of any other aspect of this disclosure or in combination with other aspects of this disclosure. For example, any number of aspects set forth herein may be used to implement an apparatus or practice. Furthermore, the scope of this disclosure is intended to cover an apparatus or method practiced by using structures, functions, or structures and functions other than those set forth herein, or by using structures, functions, or structures and functions other than those set forth herein. It should be understood that any aspect of this disclosure disclosed herein may be embodied by one or more elements of the claims.

[0029] Several aspects of a telecommunications system will now be presented with reference to various devices and technologies. These devices and technologies will be described in detail below and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively, “elements”). These elements can be implemented using hardware, software, or a combination thereof. Whether these elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the entire system.

[0030] While this document may use terms commonly associated with 5G or New Radio (NR) Radio Access Technology (RAT) to describe aspects, aspects of this disclosure may be applied to other RATs, such as 3G RAT, 4G RAT and / or RATs after 5G (e.g., 6G).

[0031] Figure 1 This is a diagram illustrating an example of a wireless network 100 according to the present disclosure. The wireless network 100 may be or may include elements of a 5G (e.g., NR) network and / or a 4G (e.g., Long Term Evolution (LTE)) network. The wireless network 100 may include one or more base stations 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d), user equipment (UE) 120 or multiple UEs 120 (shown as UE 120a, UE 120b, UE 120c, UE 120d, and UE 120e), and / or other network entities. Base station 110 is the entity that communicates with UE 120. Base station 110 (sometimes referred to as BS) may include, for example, an NR base station, an LTE base station, a Node B, an eNB (e.g., in 4G), a gNB (e.g., in 5G), an access point, and / or a Transmit / Receive Point (TRP). Each base station 110 may provide communication coverage for a specific geographic area. In the 3rd Generation Partnership Project (3GPP), the term "cell" can refer to the coverage area of ​​base station 110 and / or the base station subsystem serving that coverage area, depending on the context in which the term is used.

[0032] Base station 110 can provide communication coverage for macro cells, pico cells, femtocells, and / or another type of cell. A macro cell can cover a relatively large geographic area (e.g., a radius of several kilometers) and can allow unrestricted access for UE 120 with a service subscription. A pico cell can cover a relatively small geographic area and can allow unrestricted access for UE 120 with a service subscription. A femtocell can cover a relatively small geographic area (e.g., a home) and can allow restricted access for UE 120 associated with the femtocell (e.g., UE 120 in a Closed Subscriber Group (CSG)). Base station 110 for macro cells can be referred to as a macro base station. Base station 110 for pico cells can be referred to as a pico base station. Base station 110 for femtocells can be referred to as a femtocell or a home base station. Figure 1 In the example shown, BS 110a can be a macro base station of macro cell 102a, BS 110b can be a pico base station of pico cell 102b, and BS 110c can be a femto base station of femto cell 102c. A base station can support one or more (e.g., three) cells.

[0033] In some examples, the cell is not necessarily stationary, and the geographical area of ​​the cell can move depending on the location of the mobile base station 110 (e.g., a mobile base station). In some examples, base station 110 can use any suitable transport network to interconnect with each other and / or with one or more other base stations 110 or network nodes (not shown) in the wireless network 100 via various types of backhaul interfaces (such as direct physical connections or virtual networks).

[0034] Wireless network 100 may include one or more relay stations. A relay station is an entity that can receive data transmissions from an upstream station (e.g., base station 110 or UE 120) and transmit data transmissions to a downstream station (e.g., UE 120 or base station 110). A relay station may be a UE 120 that can relay transmissions for other UE 120s. Figure 1 In the example shown, BS 110d (e.g., a relay base station) can communicate with BS 110a (e.g., a macro base station) and UE 120d to facilitate communication between BS 110a and UE 120b. The base station 110 for relay communication can be referred to as a relay station, relay base station, relay, etc.

[0035] Wireless network 100 can be a heterogeneous network, comprising different types of base stations 110, such as macro base stations, pico base stations, femto base stations, relay base stations, etc. These different types of base stations 110 can have different transmit power levels, different coverage areas, and / or different effects on interference in wireless network 100. For example, macro base stations can have high transmit power levels (e.g., 5 to 40 watts), while pico base stations, femto base stations, and relay base stations can have lower transmit power levels (e.g., 0.1 to 2 watts).

[0036] Network controller 130 can be coupled to or communicate with a group of base stations 110, and can provide coordination and control for these base stations 110. Network controller 130 can communicate with base stations 110 via backhaul communication links. Base stations 110 can communicate with each other directly or indirectly via wireless or wired backhaul communication links.

[0037] UE 120 may be distributed throughout the wireless network 100, and each UE 120 may be fixed or mobile. UE 120 may include, for example, access terminals, terminals, mobile stations, and / or subscriber units. UE 120 may be a cellular phone (e.g., a smartphone), 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 computer, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device, a biometric device, a wearable device (e.g., a smartwatch, smart clothing, smart glasses, a smart wristband, smart jewelry (e.g., a smart ring, a smart bracelet)), an entertainment device (e.g., a music device, a video device, and / or a satellite radio), a vehicle component or sensor, a smart meter / sensor, industrial manufacturing equipment, a GPS device, and / or any other suitable device configured to communicate via a wireless medium.

[0038] Some UEs 120 may be considered Machine-Type Communication (MTC) or Evolved or Enhanced Machine-Type (eMTC) UEs. MTC UEs and / or eMTC UEs may include, for example, robots, drones, remote devices, sensors, meters, monitors, and / or location tags that can communicate with a base station, another device (e.g., a remote device), or some other entity. Some UEs 120 may be considered Internet of Things (IoT) devices, and / or may be implemented as NB-IoT (Narrowband Internet of Things) devices. Some UEs 120 may be considered customer premises equipment. UEs 120 may be included within a housing that houses the components of the UE 120, such as processor components and / or memory components. In some examples, the processor components and memory components may be coupled together. For example, the processor components (e.g., one or more processors) and memory components (e.g., memory) may be operatively coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0039] Typically, any number of wireless networks 100 can be deployed in a given geographical area. Each wireless network 100 can support a specific RAT and can operate on one or more frequencies. A RAT can be referred to as a radio technology, air interface, etc. A frequency can be referred to as a carrier, frequency channel, etc. Each frequency can support a single RAT in a given geographical area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0040] In some examples, 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 base station 110 as an intermediary for communication with each other). For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, or vehicle-to-pedestrian (V2P) protocols) and / or mesh networks. In such examples, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by base station 110.

[0041] Devices in Wireless Network 100 can communicate using the electromagnetic spectrum, which can be subdivided into various categories, bands, channels, etc., by frequency or wavelength. For example, devices in Wireless Network 100 can communicate using one or more operating frequency bands. In 5G NR, two initial operating frequency bands were identified as frequency range names FR1 (410 MHz – 7.125 GHz) and FR2 (24.25 GHz – 52.6 GHz). It should be understood that although a portion of FR1 is greater than 6 GHz, FR1 is often referred to (interchangeably) as the “Sub-6 GHz” band in various documents and articles. Similar naming issues sometimes arise with FR2; although FR2 differs from the Extremely High Frequency (EHF) band (30 GHz – 300 GHz) recognized as a “millimeter wave” band by the International Telecommunication Union (ITU), FR2 is often referred to (interchangeably) as the “millimeter wave band” in documents and articles.

[0042] The frequencies between FR1 and FR2 are generally referred to as intermediate frequencies (IFs). Recent 5G NR studies have identified the operating bands for these IFs as the frequency range FR3 (7.125 GHz – 24.25 GHz). Bands falling within FR3 can inherit FR1 and / or FR2 characteristics, and thus can effectively extend the characteristics of FR1 and / or FR2 to the IF. Furthermore, higher frequency bands are currently being utilized to extend 5G NR operation above 52.6 GHz. For example, three higher operating frequency bands have been identified as the frequency range names FR4a or FR4-1 (52.6 GHz – 71 GHz), FR4 (52.6 GHz – 114.25 GHz), and FR5 (114.25 GHz – 300 GHz). Each of these higher frequency bands falls within the EHF band.

[0043] Considering the examples above, unless otherwise specified, it should be understood that the terms "sub-6 GHz" and the like (if used herein) can broadly refer to frequencies that may be less than 6 GHz, may be within FR1, or may include intermediate frequencies. Furthermore, unless otherwise specified, it should be understood that the terms "millimeter wave" and the like (if used herein) can broadly refer to frequencies that may include intermediate frequencies, may be within FR2, FR4, FR4-a, or FR4-1 and / or FR5, or may be within the EHF band. It is conceivable that frequencies included in these operating bands (e.g., FR1, FR2, FR3, FR4, FR4-a, FR4-1, and / or FR5) can be modified, and the techniques described herein are applicable to those modified frequency ranges.

[0044] As mentioned above, Figure 1 Provided as an example. Other examples may be provided. Figure 1 The descriptions differ from those in the text.

[0045] Figure 2 This is a diagram illustrating an example 200 of communication between a base station 110 and a UE 120 in a wireless network 100 according to the present disclosure. The base station 110 may be equipped with a set of antennas 234a to 234t, such as T antennas (T ≥ 1). The UE 120 may be equipped with a set of antennas 252a to 252r, such as R antennas (R ≥ 1).

[0046] At base station 110, transmitting processor 220 can receive data for UE 120 (or a group of UE 120) from data source 212. Transmitting processor 220 can select one or more modulation and coding schemes (MCS) for UE 120, at least in part, based on one or more Channel Quality Indicators (CQIs) received from UE 120. Base station 110 can process (e.g., code and modulate) the data of UE 120, at least in part, based on the MCS selected for UE 120, and can provide data symbols for UE 120. Transmitting processor 220 can process system information (e.g., for semi-static resource partitioning information (SRPI)) and control information (e.g., CQI requests, grants, and / or upper-layer signaling), and provide overhead symbols and control symbols. Transmitting processor 220 can generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS) or demodulation reference signals (DMRS)) and synchronization signals (e.g., primary synchronization signal (PSS) or secondary synchronization signal (SSS)). If applicable, the transmit (TX) multiple-input multiple-output (MIMO) processor 230 can perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, and can provide a set of output symbol streams (e.g., T output symbol streams) to a corresponding set of modems 232 (e.g., T modems), as shown in modems 232a to 232t. For example, each output symbol stream can be provided to a modulator component (shown as MOD) of modem 232. Each modem 232 can use a corresponding modulator component to process the corresponding output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modem 232 can also use a corresponding modulator component to process (e.g., convert to analog, amplify, filter, and / or up-convert) the output sample stream to obtain a downlink signal. Modems 232a to 232t can transmit a set of downlink signals (e.g., T downlink signals) via a corresponding set of antennas 234 (e.g., T antennas) (shown as antennas 234a to 234t).

[0047] At UE 120, a set of antennas 252 (shown as antennas 252a to 252r) can receive downlink signals from base station 110 and / or other base stations 110, and can provide a set of received signals (e.g., R received signals) to a set of modems 254 (e.g., R modems), shown as modems 254a to 254r. For example, each received signal can be provided to a demodulator component (shown as DEMOD) of modem 254. Each modem 254 can use a corresponding demodulator component to condition (e.g., filter, amplify, downconvert, and / or digitize) the received signal to obtain an input sample. Each modem 254 can use the demodulator component to further process the input sample (e.g., for OFDM) to obtain a received symbol. MIMO detector 256 can obtain the received symbols from modem 254, perform MIMO detection on the received symbols if applicable, and provide the detected symbols. The receiver processor 258 can process (e.g., demodulate and decode) the detected symbols, provide decoded data for the UE 120 to the data sink 260, and provide decoding control information and system information to the controller / processor 280. The term "controller / processor" can refer to one or more controllers, one or more processors, or a combination thereof. The channel processor can determine parameters such as the Reference Signal Received Power (RSRP), Received Signal Strength Indicator (RSSI), Reference Signal Received Quality (RSRQ), and / or CQI. In some examples, one or more components of the UE 120 may be included in the housing 284.

[0048] Network controller 130 may include communication unit 294, controller / processor 290, and memory 292. Network controller 130 may include one or more devices, such as those in a core network. Network controller 130 may communicate with base station 110 via communication unit 294.

[0049] One or more antennas (e.g., antennas 234a to 234t and / or antennas 252a to 252r) may be included or may be contained in one or more antenna panels, one or more antenna groups, one or more antenna element sets, and / or one or more antenna arrays, etc. Antenna panels, antenna groups, antenna element sets, and / or antenna arrays may include one or more antenna elements (within a single housing or multiple housings), coplanar antenna element sets, non-coplanar antenna element sets, and / or coupled to one or more transmitting and / or receiving components (e.g., ...). Figure 2 One or more antenna elements (one or more components).

[0050] On the uplink, at UE 120, the transmit processor 264 can receive and process data from data source 262 and control information from controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, and / or CQI). The transmit processor 264 can generate reference symbols for one or more reference signals. If applicable, the symbols from the transmit processor 264 can be pre-encoded by the TX MIMO processor 266, further processed by the modem 254 (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to base station 110. In some examples, the modem 254 of UE 120 may include a modulator and demodulator. In some examples, UE 120 includes a transceiver. The transceiver may include any combination of antenna 252, modem 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 (e.g., references). Figures 8-10 ).

[0051] At base station 110, uplink signals from UE 120 and / or other UEs can be received by antenna 234, processed by modem 232 (e.g., demodulator component of modem 232, shown as DEMOD), detected by MIMO detector 236 (if applicable), and further processed by receive processor 238 to obtain decoded data and control information transmitted by UE 120. Receive processor 238 can provide decoded data to data receiver 239 and decoded control information to controller / processor 240. Base station 110 may include communication unit 244 and can communicate with network controller 130 via communication unit 244. Base station 110 may include scheduler 246 to schedule one or more UEs 120 for downlink and / or uplink communication. In some examples, modem 232 of base station 110 may include modulator and demodulator. In some examples, base station 110 includes transceiver. The transceiver may include any combination of antenna 234, modem 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 (e.g., references...). Figures 8-10 ).

[0052] The controller / processor 240 of base station 110, the controller / controller 280 of UE 120 and / or Figure 2Any other component may perform one or more techniques associated with sidelink resource information signaling used for sidelink resource selection, as described in more detail elsewhere herein. For example, the controller / processor 240 of base station 110, the controller / controller 280 of UE 120, and / or Figure 2 Any other component can execute or direct, for example Figure 9 Processing 900 Figure 10 The processing 1000 and / or other processing described herein. Memory 242 and memory 282 may store data and program code of base station 110 and UE 120, respectively. In some examples, memory 242 and / or memory 282 may include a non-transitory computer-readable medium storing one or more instructions (e.g., code and / or program code) for wireless communication. For example, when executed by one or more processors of base station 110 and / or UE 120 (e.g., directly or after compilation, transformation, and / or interpretation), one or more instructions may cause one or more processors, UE 120, and / or base station 110 to perform or direct, for example... Figure 9 Processing 900 Figure 10 The operations of processing 1000 and / or other processing described herein. In some aspects, the execution instructions may include run instructions, translation instructions, compilation instructions, and / or interpretation instructions.

[0053] In some aspects, the first UE (e.g., UE 120) may include components for receiving messages from the second UE via a sidelink interface, and / or components for transmitting sidelink resource information available to the second UE, wherein the sidelink resource information is based at least in part on a measured power level associated with the message received from the second UE. In some aspects, such components may include combinations of... Figure 2 One or more components of the described UE 120, such as controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256 and / or receive processor 258.

[0054] In some aspects, the first UE (e.g., UE 120) may include components for transmitting messages to the second UE via a sidelink interface, components for receiving sidelink resource information of sidelink resources available to the first UE from the second UE, wherein the sidelink resource information is at least partially based on a measured power level associated with a message received at the second UE, and / or components for transmitting inter-UE coordination signals to the second UE on sidelink resources selected at least partially according to the sidelink resource information. In some aspects, such components may include combinations of... Figure 2One or more components of the described UE 120, such as controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256 and / or receive processor 258.

[0055] Although Figure 2 The blocks are shown as different components, but the functions described above regarding the blocks can be implemented in a single hardware, software, or combined component, or in various combinations of components. For example, the functions described regarding the transmit processor 264, receive processor 258, and / or TX MIMO processor 266 can be executed by the controller / processor 280 or under the control of the controller / processor 260.

[0056] As mentioned above, Figure 2 Provided as an example. Other examples may be provided. Figure 2 The descriptions differ from those in the text.

[0057] Figure 3 This is a diagram illustrating example 300 of sidelink communication according to this disclosure.

[0058] like Figure 3 As shown, the first UE 305-1 can communicate with the second UE 305-2 (and one or more other UEs 305) via one or more sidelink channels 310. UEs 305-1 and 305-2 can communicate using one or more sidelink channels 310 for P2P communication, D2D communication, V2X communication (e.g., which may include V2V communication, V2I communication, and / or V2P communication), and / or mesh networks. In some aspects, UEs 305 (e.g., UEs 305-1 and / or UEs 305-2) can be similar to one or more other UEs described elsewhere herein, such as UE 120. In some aspects, one or more sidelink channels 310 can use a PC5 interface and / or can operate in a high-frequency band (e.g., the 5.9 GHz band). Additionally or optionally, UEs 305 can use Global Navigation Satellite System (GNSS) timing to synchronize the timing of transmission time intervals (TTIs) (e.g., frames, subframes, time slots, and / or symbols).

[0059] like Figure 3As further shown, 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. PSCCH 315 can be used to transmit control information, similar to a Physical Downlink Control Channel (PDCCH) and / or a Physical Uplink Control Channel (PUCCH) for cellular communication with base station 110 via an access link or access channel. PSSCH 320 can be used to communicate data, similar to a Physical Downlink Shared Channel (PDSCH) and / or a Physical Uplink Shared Channel (PUSCH) for cellular communication with base station 110 via an access link or access channel. For example, PSCCH 315 may carry Sidelink Control Information (SCI) 330, which may indicate various control information for sidelink communication, such as one or more resources (e.g., time resources, frequency resources, and / or spatial resources), wherein a Transport Block (TB) 335 may be carried on PSCCH 320. TB 335 may include data. PSFCH 325 can be used for communication-side link feedback 340, such as Hybrid Automatic Repeat Request (HARQ) feedback (e.g., Acknowledgment or Negative Acknowledgment (ACK / NACK) information), Transmit Power Control (TPC), and / or Schedule Request (SR).

[0060] In some aspects, one or more sidelink channels 310 may use resource pools. For example, a specific resource block (RB) may be used to transmit a scheduling allocation across time in a subchannel (e.g., included in SCI 330). In some aspects, data transmission associated with a scheduling allocation (e.g., on PSSCH 320) may occupy adjacent RBs in the same subframe as the scheduling allocation (e.g., using frequency division multiplexing). In some aspects, the scheduling allocation and associated data transmission are not transmitted on adjacent RBs.

[0061] In some aspects, UE 305 may operate using a transmission mode in which resource selection and / or scheduling is performed by UE 305 (e.g., rather than base station 110). In some aspects, UE 305 may perform resource selection and / or scheduling by sensing the channel availability of the transmission. For example, UE 305 may measure RSSI parameters (e.g., sidelink RSSI (S-RSSI) parameters) associated with various sidelink channels, may measure RSRP parameters (e.g., PSSCH-RSRP parameters) associated with various sidelink channels, and / or may measure RSRQ parameters (e.g., PSSCH-RSRQ parameters) associated with various sidelink channels, and may select the channel for transmission for sidelink communication based at least in part on (one or more) of these measurements.

[0062] Additionally or optionally, UE 305 may use SCI 330 received in PSCCH 315 to perform resource selection and / or scheduling, SCI 330 may indicate occupied resources and / or channel parameters. Additionally or optionally, UE 305 may perform resource selection and / or scheduling by determining the Channel Busy Rate (CBR) associated with various sidelink channels, CBR may be used for rate control (e.g., by indicating the maximum number of resource blocks that UE 305 can use for a particular subframe set).

[0063] In transport modes where resource selection and / or scheduling are performed by UE 305, UE 305 can generate a sidelink grant and can send that grant in SCI 330. The sidelink grant can indicate, for example, one or more parameters for an upcoming sidelink transmission (such as one or more resource blocks that will be used for an upcoming sidelink transmission on PSSCH 320 (e.g., for TB 335)), one or more subframes for the upcoming sidelink transmission, and / or the MCS for the upcoming sidelink transmission. In some aspects, UE 305 can generate a sidelink grant indicating one or more parameters for semi-persistent scheduling (SPS), such as the periodicity of the sidelink transmission. Additionally or optionally, UE 305 can generate a sidelink grant for event-driven scheduling (such as for on-demand sidelink messages).

[0064] As mentioned above, Figure 3 Provided as an example. Other examples may be provided. Figure 3 The descriptions differ from those in the text.

[0065] Figure 4 This is a diagram illustrating example 400 of sidelink communication and access link communication according to this disclosure.

[0066] like Figure 4 As shown, the transmitter (Tx) / receiver (Rx) UE 405 and the Rx / Tx UE 410 can communicate with each other via a side link, as described above. Figure 3 As further shown, in some sidelink modes, base station 110 may communicate with Tx / Rx UE 405 via a first access link. Additionally or optionally, in some sidelink modes, base station 110 may communicate with Rx / Tx UE 410 via a second access link. Tx / Rx UE 405 and / or Rx / Tx UE 410 may be similar to one or more UEs described elsewhere herein, such as... Figure 1UE 120. Therefore, the direct link between UE 120 (e.g., via the PC5 interface) can be referred to as a side link, and the direct link between base station 110 and UE 120 (e.g., via the Uu interface) can be referred to as an access link. Side link communication can be transmitted via the side link, and access link communication can be transmitted via the access link. Access link communication can be downlink communication (from base station 110 to UE 120) or uplink communication (from UE 120 to base station 110).

[0067] As mentioned above, Figure 4 Provided as an example. Other examples may be provided. Figure 4 The descriptions differ from those in the text.

[0068] Figure 5 This is a diagram illustrating example 500 of coordination signaling according to this disclosure.

[0069] In Example 500, a first UE (e.g., UE 120a) exchanges inter-UE coordination signaling with a second UE (e.g., UE 120e). The first and second UEs can operate in in-coverage mode, partial coverage mode, and / or out-of-coverage mode. For example, the first UE can determine a set of sidelink resources available for resource allocation. The first UE can determine the sidelink resource set at least in part based on determining to select a set of sidelink resources, or at least in part based on a request received from the second UE or a base station (referred to herein as an inter-UE coordination request). In some aspects, the first UE can determine the sidelink resource set at least in part based on sensing operations, which can be performed before or after receiving the inter-UE coordination request. The first UE can send information indicating the available resource set to the second UE via inter-UE coordination signaling (shown as a coordination message and in some aspects referred to as an inter-UE coordination message). The first UE can use NR sidelink resource allocation mode 2 to send the information indicating the available resource set. In NR sidelink resource allocation mode 2, resource allocation is handled by the UE (e.g., compared to NR sidelink resource allocation mode 1, where resource allocation is handled by a scheduling entity such as a base station). The second UE can select sidelink resources for transmissions from the first UE, at least in part, based on the set of available resources received from the first UE. As shown, the second UE can perform transmission charging for coordination information (e.g., via sidelink resources indicated by inter-UE coordination messages). Inter-UE coordination signaling associated with resource allocation can reduce conflicts between the first and second UEs. Inter-UE coordination signaling associated with resource allocation can reduce power consumption of the first and / or second UEs.

[0070] As mentioned above, Figure 5 Provided as an example. Other examples may be provided. Figure 5 The descriptions differ from those in the text.

[0071] Figure 6 This is a diagram illustrating example 600 of inter-UE coordination signaling according to this disclosure.

[0072] like Figure 6 As shown, a first UE (UE A) can sense sidelink resources available for sidelink communication during a sensing window. The first UE can receive multiple requests for receiving inter-UE coordination signals. For example, a second UE (UE B) and a third UE (UE C) can each send a separate request to the first UE. This request can be for sidelink resources for inter-UE coordination signals to be received from the first UE. The second and third UEs can send the requests in sub-channels that overlap in the time domain but are separate in the frequency domain. The first UE can receive the requests from the second and third UEs, and after a processing time, the first UE can be triggered to determine available sidelink resources based at least in part on the requests received from the second and third UEs.

[0073] The first UE can determine available sidelink resources and report them to the second and third UEs. The available sidelink resources reported by the first UE are valid for the duration of the first UE's selection window. In other words, from the first UE's perspective, the first UE can determine available sidelink resources and report them to the second and third UEs. The second and third UEs can receive reports of available sidelink resources from the first UE, and after processing time, they can determine which sidelink resources are available for sidelink communication. The first UE can report certain sidelink resources as available to both the second and third UEs. The available sidelink resources reported by the first UE can be used by the second and / or third UE to receive inter-UE coordination signals from the first UE.

[0074] As mentioned above, Figure 6 Provided as an example. Other examples may be provided. Figure 6 The descriptions differ from those in the text.

[0075] Figure 7 This is a diagram illustrating an example 700 of a resource conflict for inter-UE coordination signaling according to this disclosure.

[0076] The first UE can receive requests for available sidelink resources from the second UE (UE B) and the third UE (UE C). Requests received from the second and third UEs can be for sidelink resources of a given priority. The first UE can report available sidelink resources to the second and third UEs, at least in part, based on the requests received from the second and third UEs. In some cases, when there are no requests from the second and third UEs, the base station can request the first UE to report inter-UE coordination messages to both the second and third UEs simultaneously. In the case of periodic reporting, reporting to both the second and third UEs can occur simultaneously.

[0077] like Figure 7 As shown, the second UE and the third UE can use the available sidelink resources reported by the first UE to perform inter-UE coordination signaling with the first UE. For example, after performing an availability check on the first sidelink resources, the second UE can send an inter-UE coordination signal on the first sidelink reported by the first UE. After performing an availability check on the second sidelink resources, the third UE can send an inter-UE coordination signal on the second sidelink resources reported by the first UE. The first and second sidelink resources can be selected by the second UE and the third UE respectively during the resource selection window.

[0078] In some cases, the first UE can be an Rx UE of both the second and third UEs. The second and third UEs can be wearable devices. The first UE can send reports about available sidelink resources to the second and third UEs. The second and third UEs can use these reports to perform inter-UE coordination signaling with the first UE. In other cases, the first UE may not be an Rx UE of either the second or third UE. The first UE can be a dedicated node that sends reports about available sidelink resources to the second and third UEs. The second UE can use these reports to perform inter-UE coordination signaling with the third UE, and vice versa.

[0079] The first UE can report the same set of available sidelink resources to the second and third UEs. In some cases, the second and third UEs may attempt to perform inter-UE coordination signaling on the same sidelink resource, thereby causing a conflict on that same sidelink resource. In other words, both the second and third UEs may select the same sidelink resource from the same set of available sidelink resources. In other cases, the second and third UEs may avoid the same sidelink resource. In other words, both the second and third UEs can avoid the same sidelink resource and can use this information to select resources for their own transmissions. When both the second and third UEs avoid an available sidelink resource, that sidelink resource may be unused, and resource efficiency may be reduced. Additionally, sidelink resource selection can be triggered at the second and / or third UE, which may involve additional signaling and the use of sidelink resources.

[0080] As mentioned above, Figure 7 Provided as an example. Other examples may be provided. Figure 7 The descriptions differ from those in the text.

[0081] The first UE can receive sidelink resource requests from the second and third UEs. For example, compared to the third UE sending a separate sidelink resource request to the first UE, the second UE can send a sidelink resource request to the first UE at the same request time (e.g., in sub-channels that overlap in the time domain but can be separated in the frequency domain). The first UE can report the same set of available sidelink resources to the second and third UEs. Both the second and third UEs may use the same set of available sidelink resources reported by the first UE for transmissions between the second and third UEs. As a result, both the second and third UEs may attempt to send inter-UE coordination signals in the same sidelink resources, thus causing collisions in the same sidelink resources. Optionally, both the second and third UEs may avoid using the same sidelink resources for inter-UE coordination signaling, thereby reducing the efficiency of sidelink resource utilization.

[0082] In various aspects of the techniques and apparatus described herein, a first UE can receive requests for available sidelink resources from a second UE and a third UE during the same request timing. In some aspects, the first UE can measure the power level associated with the requests received from the second and third UEs. The first UE can send sidelink resource information to the second and third UEs. The sidelink resource information can be based at least in part on the measured power level of the requests received from the second and third UEs. Optionally, the sidelink resource information can be based at least in part on the measured power level of other transmissions received from the second and third UEs at the first UE, wherein the other transmissions may not be requests received from the second and third UEs. The sidelink resource information can be directed to sidelink resources available to the second and third UEs. The sidelink resource information may include interference information, transmission levels, and / or MCS information regarding the sidelink resources available to the second and third UEs. The sidelink resource information enables the second and third UEs to select available sidelink resources for data transmission while minimizing the risk of collisions and / or sidelink resource inefficiency.

[0083] In some aspects, a first UE can send inter-UE coordination messages to multiple UEs (such as a second UE and a third UE). The first UE can derive power levels at least in part based on previous messages received from the multiple UEs, where the previous messages may be at least in part based on the inter-UE coordination messages. Sidelink resource information may be at least in part based on power levels associated with previous messages. For example, power levels may be derived at least in part based on transmissions from the second UE to the first UE and from the third UE to the first UE.

[0084] Figure 8 This is a diagram illustrating an example 800 associated with sidelink resource information signaling for sidelink resource selection according to this disclosure. Figure 8 As shown, Example 800 includes communication between a first UE (e.g., UE 120a), a second UE (e.g., UE 120e), and a third UE (e.g., UE 120f). In some aspects, the first UE, the second UE, and the third UE may be included in a wireless network such as wireless network 100. The first UE, the second UE, and the third UE may communicate on a wireless sidelink.

[0085] As shown by reference numeral 802 in the attached figure, the first UE can receive a first request from the second UE. The first request may be associated with sidelink resources used for inter-UE coordination signaling from the first UE. For example, the second UE may request information from the first UE regarding available sidelink resources. Available sidelink resources can be used to perform inter-UE coordination signaling between the first UE and the second UE.

[0086] As shown by reference numeral 804 in the attached figure, the first UE can receive a second request from the third UE. The second request can be associated with sidelink resources used for inter-UE coordination signaling from the first UE. For example, the third UE can request information from the first UE about available sidelink resources. Available sidelink resources can be used to perform inter-UE coordination signaling between the first UE and the third UE.

[0087] In some respects, the first UE may receive the first request from the second UE during the same request timing as the second request received from the third UE. For example, the first and second requests may be received in sub-channels that overlap in the time domain but are separate in the frequency domain. In another example, the first and second requests may be received in sub-channels that are separate in the time and frequency domains but during the same request timing, which may span a defined number of time slots in the time domain.

[0088] In some respects, a first UE can receive requests from more than two UEs at the same request time. For example, a first UE can receive requests from three or more UEs at the same request time.

[0089] As shown by reference numeral 806 in the attached figure, the first UE can measure the power level associated with a first request received from the second UE. The first UE can measure the power level associated with the first request by determining the RSRP, RSRQ, and / or RSSI associated with the first request. Furthermore, the first UE can measure the power level associated with a second request received from the third UE. The first UE can measure the power level associated with the second request by determining the RSRP, RSRQ, and / or RSSI associated with the second request.

[0090] As shown by reference numeral 808 in the attached figure, the first UE can send sidelink resource information about the sidelink resources available to the second UE. The sidelink resource information may be based at least in part on the measured power level associated with a first request received from the second UE and the measured power level associated with a second request received from the third UE.

[0091] In some aspects, sidelink resource information may include the expected interference level on the sidelink resources for the second UE due to the third UE. The expected interference level may be based at least in part on the measured power level associated with the first request received from the second UE and the measured power level associated with the second request received from the third UE.

[0092] In some aspects, the first UE can measure the power level (e.g., RSRP) of a first request received from the second UE and the power level (e.g., RSRP) of a second request received from the third UE. The power level of the second UE can serve as the interference power at the third UE, and the power level of the third UE can serve as the interference power at the second UE. The first UE can report the interference power level or the equivalent signal-to-interference-plus-noise ratio (SINR) value to the second UE. For example, the first UE can report the expected interference power level on available sidelink resources to the second UE, where the expected interference level at the second UE is attributable to the third UE.

[0093] In some aspects, sidelink resource information may include the maximum MCS of the second UE. The maximum MCS of the second UE may be the maximum tolerable MCS and may be based at least in part on the measured power level associated with the first request received from the second UE and the measured power level associated with the second request received from the third UE. The maximum MCS may be applicable to at least a portion of multiple sidelink resources in a selection window associated with the first UE.

[0094] In some aspects, the first UE may measure the power level (e.g., RSRP) of a first request received from a second UE and the power level (e.g., RSRP) of a second request received from a third UE. The first UE may determine the maximum MCS (e.g., maximum tolerable MCS) of the second UE based at least in part on the power levels associated with the first and second requests, respectively. The first UE may send a report to the second UE including an indication of the maximum MCS. This report may include a defined number of bits (e.g., 5 bits) to define the maximum MCS of the second UE. The maximum MCS may apply to transmissions from the second UE during the first UE's selection window. The maximum MCS applicable to transmissions from the second UE may be attributed to the third UE. The maximum MCS may be a single value applicable to multiple sidelink resources (e.g., all sidelink resources) for each requesting UE (e.g., the second UE) within the first UE's selection window.

[0095] In some respects, the first UE may receive an MCS table indicator from the second UE. The first UE may determine the maximum MCS of the second UE based at least in part on the MCS table indicator received from the second UE.

[0096] In some respects, the first UE can determine the MCS table to use based at least in part on upper-layer pre-configuration and MCS table indicator received from the second UE. The MCS table indicator can be received from the second UE in SCI format 1-A. The MCS table indicator can be a 1-bit or 2-bit indicator indicating a specific MCS table to be used by the first UE. The MCS table can be pre-configured at the first UE, and / or the MCS table can be provided by upper-layer parameters, such as sidelink additional-MCS-Table (SL-Additional-MCS-Table) upper-layer parameters. The first UE can receive the MCS table indicator from the second UE, and the MCS table indicator enables the first UE to determine the maximum MCS and send the maximum MCS to the second UE.

[0097] In some aspects, the first UE can determine the MCS table indicator in multiple ways, where the maximum MCS can be determined at least in part based on the MCS table indicator. For example, the first UE can receive the MCS table indicator from the second UE. In other words, the MCS table indicator can be received from the UE that sent the request. As another example, the first UE can select the MCS table indicator without receiving it from the second UE. As yet another example, the first UE can select the MCS table indicator at least in part based on a configuration received from the base station. For example, the MCS table indicator can be fixed through pre-configuration. As yet another example, the first UE can select the MCS table indicator at least in part based on the priority of inter-UE coordination signaling from the first UE. In other words, the MCS table indicator can depend on the priority of generating inter-UE coordination signaling.

[0098] In some respects, the MCS table indicator enables a first UE to generate inter-UE coordination signals for transmission to a second UE. For example, the first UE may determine the MCS table indicator based at least in part on signaling received from the second UE, signaling received from the base station, pre-configuration at the first UE, and / or the priority of generating inter-UE coordination signaling. The first UE may perform inter-UE coordination signaling with the second UE using selected sidelink resources based at least in part on the MCS table indicator.

[0099] As shown by reference numeral 810 in the attached figure, the first UE can send sidelink resource information about the sidelink resources available to the third UE. The sidelink resource information may be based at least in part on the measured power level associated with a first request received from the second UE and the measured power level associated with a second request received from the third UE.

[0100] In some aspects, sidelink resource information may include the expected interference level on sidelink resources caused by the second UE. The expected interference level may be based at least in part on the measured power level associated with the first request received from the second UE and the measured power level associated with the second request received from the third UE.

[0101] In some respects, the first UE may determine the interference power level or equivalent SINR value based at least in part on the measured power level associated with the first and second requests. The first UE may report the interference power level to the third UE. For example, the first UE may report the expected interference power level at the third UE on one or more available sidelink resources, wherein the expected interference level of the third UE is attributable to the second UE.

[0102] In some aspects, sidelink resource information may include the maximum MCS of the third UE. The maximum MCS of the third UE may be the maximum tolerable MCS and may be based at least in part on the measured power level associated with the first request received from the second UE and the measured power level associated with the second request received from the third UE. The maximum MCS may be applicable to multiple sidelink resources in a selection window associated with the first UE.

[0103] In some respects, the first UE may determine the maximum MCS (e.g., maximum tolerable MCS) of the third UE based at least in part on the power levels associated with the first request and the second request, respectively. The first UE may send a report to the third UE including an indication of the maximum MCS. The maximum MCS may apply to transmissions from the third UE during the first UE's selection window. The maximum MCS applicable to transmissions from the third UE may be attributed to the second UE.

[0104] In some respects, the first UE may receive an MCS table indicator from the third UE. The first UE may determine the maximum MCS of the third UE based at least in part on the MCS table indicator received from the third UE.

[0105] In some respects, the first UE can determine the MCS table to use, at least in part, based on upper-layer pre-configuration and an MCS table indicator received from the third UE. The MCS table indicator can be received from the third UE in SCI format 1-A. The first UE can receive the MCS table indicator from the third UE, and the MCS table indicator enables the first UE to determine the maximum MCS and send the maximum MCS to the third UE.

[0106] In some respects, the MCS table indicator enables a first UE to generate inter-UE coordination signals for transmissions to a third UE. For example, the first UE may determine the MCS table indicator based at least in part on signaling received from the third UE, signaling received from the base station, pre-configuration at the first UE, and / or the priority of generating inter-UE coordination signaling. The first UE may perform inter-UE coordination signaling with the third UE using selected sidelink resources based at least in part on the MCS table indicator.

[0107] As shown by reference numeral 812 in the attached figure, the second UE can receive sidelink resource information from the first UE, wherein the sidelink resource information may include the expected interference power level and / or the maximum MCS. The second UE can transmit communication on sidelink resources selected at least in part based on the sidelink resource information. In other words, the second UE can select sidelink resources at least in part based on the expected interference power level and / or the maximum MCS included in the sidelink resource information received from the first UE.

[0108] Similarly, the third UE can receive sidelink resource information from the first UE, wherein the sidelink resource information may include the expected interference power level and / or the maximum MCS. The third UE can transmit communication on sidelink resources selected at least in part based on the sidelink resource information.

[0109] In some respects, the second UE and / or the third UE may transmit communication on available sidelink resources based at least in part on the maximum MCS. For example, the second UE and / or the third UE may sense and reserve available sidelink resources, and the second UE or the third UE may apply the maximum MCS for the first transmission on a first reserved sidelink resource included in the sidelink resources.

[0110] In some respects, when the first UE does not detect a collision on reserved sidelink resources, the second and / or third UE may transmit communication on available sidelink resources, at least in part, based on ignoring the maximum MCS. For example, for transmission opportunities other than the first transmission on the first reserved sidelink resources, when no collision is detected from another UE in the same UE group (e.g., a group of UEs, such as the second and third UEs, that send requests to the first UE during the same request time), the second or third UE may ignore the maximum MCS. The second and / or third UE may detect collisions from another UE in the same UE group, at least in part, based on the source identifier (ID) of the UE included in the same UE group, where the source ID can be received from the first UE.

[0111] In some respects, when a first UE detects a collision on a reserved sidelink resource, a second UE and / or a third UE may transmit communication on an available sidelink resource, at least in part, based on the maximum MCS. For example, for transmissions other than the first transmission on the first reserved sidelink resource, when a collision is identified from another UE in the same UE group, the second UE and / or the third UE may apply the maximum MCS on a given sidelink resource.

[0112] In some respects, the second and / or third UE can detect SCIs from other UEs in the same UE group. When the second and / or third UE cannot detect SCIs from other UEs in the same UE group, the second or third UE can apply the maximum MCS when a reduction in latency is desired. Alternatively, the second and / or third UE can ignore the maximum MCS, which may increase the likelihood of failure but improve throughput.

[0113] In some respects, the first UE can send information indicating a set of disjoint sidelink resources to the second UE and / or the third UE. The set of disjoint sidelink resources can indicate the sidelinks available to the second UE and / or the third UE. When the second UE and / or the third UE cannot sense available sidelink resources on their own, the first UE can report the set of disjoint sidelink resources.

[0114] In some respects, the first UE may send information indicating disjoint sets of sidelink resources, along with additional information, to the second and / or third UE. The additional information may include the maximum MCS and / or the expected interference power level.

[0115] In some respects, the first UE may send an indication to the second UE and / or the third UE of the maximum number of layers supported at the first UE. The first UE may instruct the second UE and / or the third UE to transmit using a defined number of layers, at least in part based on the maximum number of layers supported at the first UE. For example, the first UE may have two receive antennas, and the first UE may request the second UE and / or the third UE to transmit using a single layer.

[0116] In some respects, the first UE can perform channel estimation separately for the channels between the first UE and the second and third UEs, because Channel State Information Reference Signal (CSI-RS) can be supported on the sidelink interface. The first UE can use channel estimation to offset or reduce interference on the available sub-channels in the Channel State Information (CSI) report.

[0117] As mentioned above, Figure 8 Provided as an example. Other examples may be provided. Figure 8 The descriptions differ from those in the text.

[0118] Figure 9This is a diagram illustrating an example process 900 performed, for example, by a first UE according to this disclosure. Example process 900 is an example of an operation performed by a first UE (e.g., UE 120) associated with sidelink resource information signaling for sidelink resource selection.

[0119] like Figure 9 As shown, in some aspects, processing 900 may include receiving messages from the second UE via a sidelink interface (block 910). For example, as described above, the first UE (e.g., using antenna 252, demodulator 254, MIMO detector 256, receiver processor 258, controller / processor 280 and / or memory 282) may receive messages from the second UE via a sidelink interface.

[0120] like Figure 9 As further shown, in some aspects, processing 900 may include sending sidelink resource information about sidelink resources available to the second UE, wherein the sidelink resource information is based at least in part on a measured power level associated with a message received from the second UE (block 920). For example, the first UE (e.g., using antenna 252, transmit processor 264, TX MIMO processor 266, modulator 254, controller / processor 280, and / or memory 282) may send sidelink resource information about sidelink resources available to the second UE, wherein the sidelink resource information is based at least in part on a measured power level associated with a message received from the second UE.

[0121] Process 900 may include additional aspects, such as any single aspect or any combination of aspects of one or more other processes described below and / or elsewhere herein.

[0122] In the first aspect, the message is associated with sidelink resources for inter-UE coordination signaling from the first UE.

[0123] In the second aspect, alone or in combination with the first aspect, processing 900 includes performing RSRP measurements of the message as a measurement power level associated with the message.

[0124] In a third aspect, either alone or in combination of one or more of the first and second aspects, processing 900 includes receiving additional messages from a third UE, and determining sidelink resource information available for sidelink resources of the second UE and the third UE, based at least in part on the measured power level associated with the message received from the second UE and the measured power level associated with the additional message received from the third UE.

[0125] In the fourth aspect, either alone or in combination with one or more of the first to third aspects, the sidelink resource information includes the expected interference level on the sidelink resources caused by the third UE, and the expected interference level is based at least in part on the measured power level associated with a message received from the second UE and the measured power level associated with an additional message received from the third UE.

[0126] In the fifth aspect, alone or in combination with one or more of the first to fourth aspects, the sidelink resource information includes the maximum MCS of the second UE, and the maximum MCS of the second UE is based at least in part on the measured power level associated with a message received from the second UE and the measured power level associated with an additional message received from the third UE.

[0127] In the sixth aspect, either alone or in combination with one or more of the first to fifth aspects, the maximum MCS can be applied to multiple sidelink resources in the selection window associated with the first UE.

[0128] In the seventh aspect, alone or in combination with one or more of the first to sixth aspects, processing 900 includes receiving an MCS table indicator from the second UE and determining the maximum MCS of the second UE based at least in part on the MCS table indicator received from the second UE.

[0129] In the eighth aspect, alone or in combination with one or more of the first to seventh aspects, processing 900 includes selecting an MCS table indicator and determining the maximum MCS of the second UE based at least in part on the MCS table indicator.

[0130] In the ninth aspect, alone or in combination with one or more of the first to eighth aspects, the process 900 includes selecting an MCS table indicator based at least in part on a configuration received from the base station, and determining the maximum MCS of the second UE based at least in part on the MCS table indicator.

[0131] In the tenth aspect, alone or in combination with one or more of the first to ninth aspects, processing 900 includes selecting an MCS table indicator based at least in part on the priority of inter-UE coordination signaling from the first UE, and determining the maximum MCS of the second UE based at least in part on the MCS table indicator.

[0132] In the eleventh aspect, alone or in combination with one or more of the first to tenth aspects, processing 900 includes determining an MCS table indicator and using selected sidelink resources based at least in part on the MCS table indicator to perform inter-UE coordination signaling with the second UE.

[0133] In the twelfth aspect, either alone or in combination with one or more of the first to eleventh aspects, the maximum MCS applies to at least a portion of the sidelink resources in the selection window associated with the first UE.

[0134] In the thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, processing 900 includes sending a set of sidelink resources to the second UE, and the set of sidelink resources indicates the sidelink resources available to the second UE.

[0135] In the fourteenth aspect, alone or in combination with one or more of the first to thirteenth aspects, processing 900 includes sending an indication to the second UE of the maximum number of layers supported at the first UE, and instructing the second UE to transmit using a defined number of layers based at least in part on the maximum number of layers supported at the first UE.

[0136] although Figure 9 An example block for processing 900 is shown, but in some respects, processing 900 can include... Figure 9 The blocks shown can be different additional blocks, fewer blocks, different blocks, or blocks with different arrangements. Alternatively or concurrently, two or more blocks of 900 can be processed.

[0137] Figure 10 This is a diagram illustrating an example process 1000 performed, for example, by a first UE according to this disclosure. Example process 1000 is an example of an operation performed by a first UE (e.g., UE 120) associated with sidelink resource information signaling for sidelink resource selection.

[0138] like Figure 10 As shown, in some aspects, processing 1000 may include sending messages to the second UE via a sidelink interface (block 1010). For example, as described above, the first UE (e.g., using antenna 252, transmit processor 264, TX MIMO processor 266, modulator 254, controller / processor 280 and / or memory 282) may send messages to the second UE via a sidelink interface.

[0139] like Figure 10As further shown, in some aspects, processing 1000 may include receiving sidelink resource information of sidelink resources available to the first UE from the second UE, wherein the sidelink resource information is based at least in part on a measured power level associated with a message received by the second UE (block 1020). For example, the first UE (e.g., using antenna 252, demodulator 254, MIMO detector 256, receiver processor 258, controller / processor 280, and / or memory 282) may receive sidelink resource information of sidelink resources available to the first UE from the second UE, wherein the sidelink resource information is based at least in part on a measured power level associated with a message received by the second UE.

[0140] like Figure 10 As further shown, in some aspects, processing 1000 may include transmitting an inter-UE coordination signal to the second UE on a sidelink resource selected at least in part based on sidelink resource information (block 1030). For example, as described above, the first UE (e.g., using antenna 252, transmit processor 264, TX MIMO processor 266, modulator 254, controller / processor 280, and / or memory 282) may transmit the inter-UE coordination signal to the second UE on a sidelink resource selected at least in part based on sidelink resource information. In some aspects, the first UE may transmit communications other than the inter-UE coordination signal. In some aspects, the first UE may transmit communications to devices other than the second UE.

[0141] Process 1000 may include additional aspects, such as any single aspect or any combination of aspects of one or more other processes described below and / or elsewhere herein.

[0142] In the first aspect, the message is associated with sidelink resources used for inter-UE coordination signaling with the second UE.

[0143] In the second aspect, either alone or in combination with the first aspect, the measured power level associated with the message is the RSRP measurement of the message.

[0144] In a third aspect, either alone or in combination with one or more of the first and second aspects, the sidelink resource information includes the expected interference level on the sidelink resources caused by the third UE, and the expected interference level is based at least in part on the measured power level associated with a message received by the second UE and the measured power level associated with an additional message received by the second UE.

[0145] In the fourth aspect, alone or in combination with one or more of the first to third aspects, the sidelink resource information includes the maximum MCS of the first UE, and the maximum MCS of the first UE is based at least in part on the measured power level associated with a message received by the second UE and the measured power level associated with an additional message received by the second UE.

[0146] In the fifth aspect, either alone or in combination with one or more of the first to fourth aspects, the maximum MCS can be applied to multiple sidelink resources in the selection window associated with the second UE.

[0147] In the sixth aspect, alone or in combination with one or more of the first to fifth aspects, processing 1000 includes sending an MCS table indicator to the second UE, and the maximum MCS of the first UE is at least partially based on the MCS table indicator.

[0148] In the seventh aspect, either alone or in combination with one or more of the first to sixth aspects, processing 1000 includes sending an MCS table indicator to the second UE and performing inter-UE coordination signaling with the second UE using selected sidelink resources based at least in part on the MCS table indicator.

[0149] In the eighth aspect, either alone or in combination with one or more of the first to seventh aspects, the maximum MCS applies to at least a portion of the sidelink resources in the selection window associated with the second UE.

[0150] In the ninth aspect, alone or in combination with one or more of the first to eighth aspects, processing 1000 includes performing transmissions on reserved sidelink resources in the sidelink resources available to the first UE, based at least in part on the maximum MCS.

[0151] In the tenth aspect, alone or in combination with one or more of the first to ninth aspects, processing 1000 includes performing transmission on the reserved sidelink resources available to the first UE, at least in part based on the ignoring of the maximum MCS, when no collision is detected on the reserved sidelink resources of the first UE.

[0152] In the eleventh aspect, alone or in combination with one or more of the first to tenth aspects, processing 1000 includes performing a transmission on a reserved sidelink resource among the sidelink resources available to the first UE, at least in part based on the maximum MCS, when the first UE detects a collision on a reserved sidelink resource.

[0153] In the twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, processing 1000 includes receiving a set of sidelink resources from the second UE, and the set of sidelink resources indicates the sidelink resources available to the first UE.

[0154] In the thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, processing 1000 includes receiving from the second UE an indication of the maximum number of layers supported at the second UE, and receiving from the second UE a message to transmit using a defined number of layers that are at least partially based on the maximum number of layers supported at the third UE.

[0155] although Figure 10 An example block for processing 1000 is shown, but in some respects, processing 1000 can include... Figure 10 The blocks shown can be different additional blocks, fewer blocks, different blocks, or blocks with different arrangements. Alternatively or concurrently, two or more blocks of up to 1000 can be processed.

[0156] The following provides an overview of some aspects of this disclosure:

[0157] Aspect 1: A method of wireless communication performed by a first user equipment (UE), comprising: receiving a message from a second UE via a sidelink interface; and transmitting to the second UE sidelink resource information of sidelink resources available to the second UE, wherein the sidelink resource information is based at least in part on a measured power level associated with the message received from the second UE.

[0158] Aspect 2: According to the method of aspect 1, the message is associated with sidelink resources for inter-UE coordination signaling from the first UE.

[0159] Aspect 3: The method according to any one of aspects 1 to 2 further includes: performing a reference signal received power (RSRP) measurement of the message as a measured power level associated with the message.

[0160] Aspect 4: The method according to any one of aspects 1 to 3 further includes: receiving an additional message from a third UE; and determining sidelink resource information of sidelink resources available to the second UE and the third UE based at least in part on a measured power level associated with a message received from the second UE and a measured power level associated with an additional message received from the third UE.

[0161] Aspect 5: According to the method of aspect 4, the sidelink resource information includes the expected interference level on the sidelink resources caused by the third UE, and wherein the expected interference level is at least partially based on the measured power level associated with a message received from the second UE and the measured power level associated with an additional message received from the third UE.

[0162] Aspect 6: According to the method of aspect 4, the sidelink resource information includes the maximum modulation and coding scheme (MCS) of the second UE.

[0163] Aspect 7: According to the method of aspect 6, wherein the maximum MCS applies to multiple sidelink resources in the selection window associated with the first UE.

[0164] Aspect 8: The method according to aspect 6 further includes: receiving an MCS table indicator from the second UE; and determining the maximum MCS of the second UE based at least in part on the MCS table indicator received from the second UE.

[0165] Aspect 9: The method according to aspect 6 further includes: selecting an MCS table indicator; and determining the maximum MCS of the second UE based at least in part on the MCS table indicator.

[0166] Aspect 10: The method according to aspect 6 further includes: selecting an MCS table indicator based at least in part on a configuration received from a base station; and determining the maximum MCS of the second UE based at least in part on the MCS table indicator.

[0167] Aspect 11: The method according to aspect 6 further includes: selecting an MCS table indicator based at least in part on the priority of inter-UE coordination signaling from the first UE; and determining the maximum MCS of the second UE based at least in part on the MCS table indicator.

[0168] Aspect 12: The method according to aspect 6 further includes: determining an MCS table indicator; and performing inter-UE coordination signaling with a second UE using selected sidelink resources based at least in part on the MCS table indicator.

[0169] Aspect 13: According to the method of aspect 6, wherein the maximum MCS applies to at least a portion of the sidelink resources in the selection window associated with the first UE.

[0170] Aspect 14: The method according to any one of aspects 1 to 13 further includes: sending a sidelink resource set to the second UE, wherein the sidelink resource set indicates sidelink resources available to the second UE.

[0171] Aspect 15: The method according to any one of aspects 1 to 14 further includes: sending to the second UE an indication of the maximum number of layers supported at the first UE; and instructing the second UE to transmit using a defined number of layers that are at least partially based on the maximum number of layers supported at the first UE.

[0172] Aspect 16: A method of wireless communication performed by a first user equipment (UE), comprising: sending a message to a second UE via a sidelink interface; receiving sidelink resource information of sidelink resources available to the first UE from the second UE, wherein the sidelink resource information is based at least in part on a measured power level associated with the message received by the second UE; and sending an inter-UE coordination signal to the second UE on a sidelink resource selected at least in part based on the sidelink resource information.

[0173] Aspect 17: According to the method of aspect 16, the message is associated with sidelink resources for inter-UE coordination signaling with the second UE.

[0174] Aspect 18: The method according to any one of aspects 16 to 17, wherein the measured power level associated with the message is a reference signal received power (RSRP) measurement of the message.

[0175] Aspect 19: The method according to any one of aspects 16 to 18, wherein the sidelink resource information includes the expected interference level on the sidelink resources caused by the third UE, and wherein the expected interference level is at least partially based on the measured power level associated with a message received by the second UE and the measured power level associated with an additional message received by the second UE.

[0176] Aspect 20: The method according to any one of aspects 16 to 19, wherein the sidelink resource information includes the maximum modulation and coding scheme (MCS) of the first UE.

[0177] Aspect 21: The method according to aspect 20, wherein: the maximum MCS applies to multiple sidelink resources in a selection window associated with the second UE; or the maximum MCS applies to at least a portion of multiple sidelink resources in a selection window associated with the second UE.

[0178] Aspect 22: The method according to aspect 20 further includes: sending an MCS table indicator to a second UE, wherein the maximum MCS of the first UE is at least partially based on the MCS table indicator.

[0179] Aspect 23: The method according to aspect 20 further includes: sending an MCS table indicator to the second UE; and performing inter-UE coordination signaling with the second UE using selected sidelink resources based at least in part on the MCS table indicator.

[0180] Aspect 24: The method according to aspect 20 further includes: performing transmission on reserved sidelink resources in the sidelink resources available to the first UE, at least in part based on the maximum MCS.

[0181] Aspect 25: The method according to aspect 20 further includes: when the first UE does not detect a conflict on the reserved sidelink resources, performing transmission on the reserved sidelink resources available to the first UE, at least in part based on ignoring the maximum MCS.

[0182] Aspect 26: The method according to aspect 20 further includes: when the first UE detects a collision on a reserved sidelink resource, performing a transmission on a reserved sidelink resource available to the first UE, at least in part based on the maximum MCS.

[0183] Aspect 27: The method according to any one of aspects 16 to 26 further includes: receiving a set of sidelink resources from a second UE, wherein the set of sidelink resources indicates sidelink resources available to the first UE.

[0184] Aspect 28: The method according to any one of aspects 16 to 27 further includes: receiving from the second UE an indication of the maximum number of layers supported at the second UE; and receiving from the second UE a message to transmit using a defined number of layers at least in part based on the maximum number of layers supported at the second UE.

[0185] Aspect 29: An apparatus for wireless communication at a device, comprising a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform one or more of the methods of aspects 1-15.

[0186] Aspect 30: An apparatus for wireless communication, comprising a memory and one or more processors coupled to the memory, the one or more processors being configured to perform one or more methods of aspects 1-15.

[0187] Aspect 31: A device for wireless communication, comprising at least one component for performing one or more of the methods of aspects 1-15.

[0188] Aspect 32: A non-transitory computer-readable medium storing code for wireless communication, said code including instructions executable by a processor to perform one or more of the methods of aspects 1-15.

[0189] Aspect 33: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions which, when executed by one or more processors of a device, cause the device to perform one or more methods of aspects 1-15.

[0190] Aspect 34: An apparatus for wireless communication at a device, comprising a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the device to perform one or more of the methods of aspects 16-28.

[0191] Aspect 35: An apparatus for wireless communication, comprising a memory and one or more processors coupled to the memory, the one or more processors being configured to perform one or more methods of aspects 16-28.

[0192] Aspect 36: An apparatus for wireless communication, comprising at least one component for performing one or more of the methods of aspects 16-28.

[0193] Aspect 37: A non-transitory computer-readable medium storing code for wireless communication, said code including instructions executable by a processor to perform one or more of the methods of aspects 16-28.

[0194] Aspect 38: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions which, when executed by one or more processors of a device, cause the device to perform one or more methods of aspects 16-28.

[0195] The foregoing disclosure provides illustrations and descriptions, but is not intended to be exhaustive or to limit the aspects to the precise form disclosed. Modifications and variations can be made based on the foregoing disclosure, or from practice in these aspects.

[0196] As used herein, the term "component" is intended to be interpreted broadly as hardware and / or a combination of hardware and software. "Software" should be interpreted broadly as instructions, instruction sets, code, code segments, program code, programs, subroutines, software modules, applications, software applications, packages, routines, subroutines, objects, executable files, threads of execution, procedures and / or functions, etc., whether referring to software, firmware, middleware, microcode, hardware description languages, or others. As used herein, a "processor" is implemented in hardware and / or a combination of hardware and software. It is evident that the systems and / or methods described herein can be implemented in various forms of hardware and / or combinations of hardware and software. The actual dedicated control hardware or software code used to implement these systems and / or methods does not limit these aspects. Therefore, this document describes the operation and behavior of systems and / or methods without referring to specific software code, as those skilled in the art will understand that software and hardware can be designed to implement systems and / or methods, at least in part, based on the descriptions herein.

[0197] As used in this article, depending on the context, "meeting the threshold" can refer to a value that is 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, etc.

[0198] Although specific combinations of features are recited in the claims and / or disclosed in the description, these combinations are not intended to limit the disclosure of aspects. In fact, many of these features can be combined in ways not specifically recited in the claims and / or disclosed in the description. Disclosure of aspects includes each dependent claim in combination with each other claim in the claim set. As used herein, the term “at least one” refers to any combination of these items, including a single member. For 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 having multiple identical elements (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 order of a, b, and c).

[0199] Unless explicitly stated otherwise, no element, action, or instruction used herein should be construed as critical or necessary. Furthermore, as used herein, "a" and "an" are intended to include one or more items and may be used interchangeably with "one or more." Furthermore, as used herein, "the" is intended to include one or more items associated with the term "the" and may be used interchangeably with "one or more." Furthermore, as used herein, the terms "set" and "group" are intended to include one or more items and may be used interchangeably with "one or more." If only one item is intended, the phrase "only one" or similar language is used. Furthermore, as used herein, terms such as "having" are intended to be open-ended terms that do not limit the elements they modify (e.g., an element having A may also have B). Furthermore, unless explicitly stated otherwise, the phrase "based on" is intended to mean "at least partially based on." Furthermore, as used herein, the term "or" should be included when used in a series and may be used interchangeably with "and / or" unless explicitly stated otherwise (e.g., if used in combination with "or" or "only one").

Claims

1. A method for wireless communication performed by a first user equipment (UE), comprising: Messages are received from the second UE via the sidelink interface; Send sidelink resource information of available sidelink resources to the second UE, wherein the sidelink resource information is based at least in part on a measured power level associated with a message received from the second UE; Receive additional messages from the third UE; and Sidelink resource information, which determines the available sidelink resources for the second and third UEs, is based at least in part on measured power levels associated with messages received from the second UE and measured power levels associated with additional messages received from the third UE. The sidelink resource information includes the maximum modulation and coding scheme (MCS) of the second UE, which is determined at least in part based on the measured power level associated with a message received from the second UE and the measured power level associated with an additional message received from the third UE.

2. The method according to claim 1, wherein, The message is associated with sidelink resources used for inter-UE coordination signaling from the first UE.

3. The method according to claim 1, further comprising: Perform a reference signal received power (RSRP) measurement of the message as the measured power level associated with the message.

4. The method according to claim 1, wherein, The sidelink resource information includes the expected interference level on the sidelink resources for the second UE due to the third UE, and wherein the expected interference level is based at least in part on the measured power level associated with a message received from the second UE and the measured power level associated with an additional message received from the third UE.

5. The method according to claim 1, wherein, The maximum MCS applies to multiple sidelink resources in the selection window associated with the first UE.

6. The method according to claim 1, further comprising: Receive the MCS table indicator from the second UE; as well as The maximum MCS of the second UE is determined at least in part based on the MCS table indicator received from the second UE.

7. The method according to claim 1, further comprising: Select the MCS table indicator; as well as The maximum MCS of the second UE is determined at least in part based on the MCS table indicator.

8. The method according to claim 1, further comprising: The MCS table indicator is selected based at least in part on the configuration received from the base station; as well as The maximum MCS of the second UE is determined at least in part based on the MCS table indicator.

9. The method according to claim 1, further comprising: The MCS table indicator is selected at least in part based on the priority of inter-UE coordination signaling from the first UE; as well as The maximum MCS of the second UE is determined at least in part based on the MCS table indicator.

10. The method according to claim 1, further comprising: Determine the MCS table indicator; as well as Inter-UE coordination signaling is performed with the second UE using selected sidelink resources, which are at least partially based on the MCS table indicator.

11. The method according to claim 1, wherein, The maximum MCS applies to at least a portion of the sidelink resources in the selection window associated with the first UE.

12. The method according to claim 1, further comprising: Send a set of sidelink resources to the second UE, wherein the set of sidelink resources indicates the sidelink resources available to the second UE.

13. The method according to claim 1, further comprising: Send an indication to the second UE of the maximum number of layers supported at the first UE; as well as The second UE is instructed to transmit using a defined number of layers, at least in part based on the maximum number of layers supported at the first UE.

14. A method for wireless communication performed by a second user equipment (UE), comprising: Send a message to the first UE via the sidelink interface; The first UE receives sidelink resource information about sidelink resources available to the second UE, wherein the sidelink resource information is based at least in part on a measured power level associated with a message received by the first UE; and Sending inter-UE coordination signals to the first UE on sidelink resources selected at least in part based on sidelink resource information. The sidelink resource information includes the maximum modulation and coding scheme (MCS) of the second UE, which is determined at least in part based on the measured power level associated with the message received by the first UE.

15. The method according to claim 14, wherein, The message is associated with sidelink resources used for inter-UE coordination signaling with the first UE.

16. The method of claim 14, wherein, The power level associated with the message is the reference signal received power (RSRP) measurement of the message.

17. The method according to claim 14, wherein, The sidelink resource information includes the expected interference level on the sidelink resources caused by the third UE, and wherein the expected interference level is based at least in part on the measured power level associated with a message received at the first UE and the measured power level associated with an additional message received at the first UE.

18. The method of claim 14, wherein: The maximum MCS applies to multiple sidelink resources within the selection window associated with the first UE; or The maximum MCS applies to at least a portion of the multiple sidelink resources in the selection window associated with the first UE.

19. The method of claim 14, further comprising: Send an MCS table indicator to the first UE, wherein the maximum MCS of the second UE is at least partially based on the MCS table indicator.

20. The method of claim 14, further comprising: Send the MCS table indicator to the first UE; as well as Inter-UE coordination signaling is performed with the first UE using selected sidelink resources based at least in part on the MCS table indicator.

21. The method of claim 14, further comprising: Transmissions are performed on reserved sidelink resources, at least in part, based on the maximum MCS, within the sidelink resources available to the second UE.

22. The method of claim 14, further comprising: When no collision is detected on the reserved sidelink resources of the second UE, transmission is performed on the reserved sidelink resources available to the second UE, based at least in part on ignoring the maximum MCS.

23. The method of claim 14, further comprising: When the second UE detects a collision on a reserved sidelink resource, transmission is performed on the reserved sidelink resource available to the second UE, at least in part based on the maximum MCS.

24. The method of claim 14, further comprising: The first UE receives a set of sidelink resources, wherein the set of sidelink resources indicates the sidelink resources available to the second UE.

25. The method of claim 14, further comprising: Receive an indication of the maximum number of layers supported at the first UE; as well as Messages are received from the first UE to transmit using a defined number of layers, at least in part based on the maximum number of layers supported at the first UE.

26. A first user equipment (UE) for wireless communication, comprising: Memory; as well as One or more processors, coupled to memory, are configured as follows: Messages are received from the second UE via the sidelink interface; Send sidelink resource information of available sidelink resources to the second UE, wherein the sidelink resource information is based at least in part on a measured power level associated with a message received from the second UE; Receive additional messages from the third UE; and Sidelink resource information, which determines the available sidelink resources for the second and third UEs, is based at least in part on measured power levels associated with messages received from the second UE and measured power levels associated with additional messages received from the third UE. The sidelink resource information includes the maximum modulation and coding scheme (MCS) of the second UE, which is determined at least in part based on the measured power level associated with a message received from the second UE and the measured power level associated with an additional message received from the third UE.

27. A second user equipment (UE) for wireless communication, comprising: Memory; as well as One or more processors, coupled to memory, are configured as follows: Send a message to the first UE via the sidelink interface; Sidelink resource information of available sidelink resources for the second UE is received from the first UE, wherein the sidelink resource information is based at least in part on a measured power level associated with a message received at the first UE; and Sending inter-UE coordination signals to the first UE on sidelink resources selected at least in part based on sidelink resource information. The sidelink resource information includes the maximum modulation and coding scheme (MCS) of the second UE, which is determined at least in part based on the measured power level associated with the message received by the first UE.

28. A first user equipment (UE) for wireless communication, comprising components for performing the method as described in any one of claims 1 to 13.

29. A second user equipment (UE) for wireless communication, comprising components for performing the method as claimed in any one of claims 14 to 25.

30. A non-transitory computer-readable storage medium for wireless communication executed by a first user equipment (UE), the non-transitory computer-readable storage medium storing instructions that cause a processor to perform the method as described in any one of claims 1 to 13.

31. A non-transitory computer-readable storage medium for wireless communication executed by a second user equipment (UE), the non-transitory computer-readable storage medium storing instructions that cause a processor to perform the method as described in any one of claims 14 to 25.

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