Vehicle-to-Everything (V2X) Destination Identification Sharing for User Equipment (UE) Coordination

Abstract

A method for wireless communication by an identifier-receiving user equipment (UE) includes measuring received signal power of a plurality of resource UEs. The method also includes receiving a set of identifiers from the identifier-transmitting UE. The method also includes identifying resources used by at least one of the plurality of resource UEs for future transmissions from the identifier-receiving UE based on the measured received signal power and the received set of identifiers. The method also includes scheduling the future transmission on the at least one identified resource.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to U.S. application No. 17 / 316,623, filed on May 10, 2021, entitled “NEW RADIO (NR) VEHICLE-TO-EVERYTHING (V2X) DESTINATION IDENTIFICATION SHARING FOR INTER-USER EQUIPMENT (UE) COORDINATION,” which claims the benefit of U.S. Provisional Application No. 63 / 023,164, filed on May 11, 2020, entitled “NEW RADIO (NR) VEHICLE-TO-EVERYTHING (V2X) DESTINATION IDENTIFICATION SHARING FOR INTER-USER EQUIPMENT (UE) COORDINATION,” the disclosures of which are expressly incorporated by reference in their entirety. Technical Field

[0003] Aspects of the present disclosure relate generally to wireless communications, and more particularly to techniques and apparatuses for vehicle-to-everything (V2X) user equipment (UE) coordination. Background Art

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunication services, such as telephony, video, data, messaging, and broadcasting. Typical wireless communication systems may employ multiple access technologies capable of supporting communication with multiple users by sharing available system resources. 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, and time division synchronous code division multiple access (TD-SCDMA) systems.

[0005] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at a city, country, regional, and even global level. An example telecommunication standard is the fifth generation (5G) New Radio (NR). 5G NR is part of the continued mobile broadband evolution released by the 3rd Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., in conjunction with the Internet of Things (IoT)), and other requirements. 5G NR includes services associated with enhanced mobile broadband (eMBB), massive machine type communications (mMTC), and ultra-reliable low latency communications (URLLC), some or all of which may be important in vehicle-to-everything (V2X) communication systems. Some aspects of 5G NR may be based on the fourth generation (4G) Long Term Evolution (LTE) standard.

[0006] The wireless communication system may include or provide support for various types of communication systems, such as vehicle-related communication systems (e.g., V2X communication systems). Vehicle-related communication systems may be used by vehicles to increase safety and help prevent vehicle collisions. Information about severe weather, nearby accidents, road conditions, and / or other information may be transmitted to the driver via the vehicle-related communication system. In some cases, vehicles may communicate directly with each other using device-to-device (D2D) communication over D2D wireless links.

[0007] As the demand for vehicle-to-everything (V2X) communication increases, different V2X communication systems compete for the same wireless communication resources. Therefore, improvements in the allocation of wireless communication resources are still useful. Summary of the Invention

[0008] In one aspect of the present disclosure, a method for wireless communication performed by an identifier-receiving user equipment (UE) is disclosed. The method includes measuring received signal power of a plurality of resource UEs. The method also includes receiving a set of identifiers from an identifier-transmitting UE. The method also includes identifying one or more resources used by one or more of the resource UEs for future transmissions based on the measured received signal power and the received set of identifiers. The method also includes scheduling the future transmissions on the one or more identified resources.

[0009] Another aspect of the present disclosure relates to an apparatus for wireless communication at an identifier-receiving UE. The apparatus includes means for measuring received signal power of a plurality of resource UEs. The apparatus also includes means for receiving a set of identifiers from an identifier-transmitting UE. The apparatus also includes means for identifying one or more resources used by one or more of the resource UEs for future transmissions based on the measured received signal power and the received set of identifiers. The apparatus also includes means for scheduling the future transmissions on the one or more identified resources.

[0010] In another aspect of the present disclosure, a non-transitory computer-readable medium having program code recorded thereon for wireless communication at an identifier-receiving UE is disclosed. The program code is executed by a processor and includes program code for measuring received signal power of a plurality of resource UEs. The program code also includes program code for receiving a set of identifiers from an identifier-sending UE. The program code also includes program code for identifying one or more resources used by one or more of the resource UEs for future transmissions based on the measured received signal power and the received set of identifiers. The program code also includes program code for scheduling the future transmissions on the one or more identified resources.

[0011] Another aspect of the present disclosure relates to an apparatus for wireless communication at an identifier-receiving UE, the apparatus comprising a processor and a memory communicatively coupled to the processor and storing instructions that, when executed by the processor, cause the apparatus to measure received signal power of a plurality of resource UEs. Execution of the instructions further causes the apparatus to receive a set of identifiers from an identifier-sending UE. Execution of the instructions further causes the apparatus to identify one or more resources used by one or more of the resource UEs for future transmissions based on the measured received signal power and the received set of identifiers. Execution of the instructions further causes the apparatus to schedule the future transmissions on the one or more identified resources.

[0012] In one aspect of the present disclosure, a method for wireless communication performed by an identifier-sending UE is disclosed. The method includes measuring received signal power of a plurality of resource UEs. The method also includes generating an identifier set by adding a resource UE from the resource UEs to an identifier set when the received signal power of the resource UEs is greater than an identifier-sending UE received signal power threshold. The method also includes transmitting the identifier set to an identifier-receiving UE.

[0013] Another aspect of the present disclosure relates to an apparatus for wireless communication at an identifier-sending UE. The apparatus includes means for measuring received signal power of a plurality of resource UEs. The apparatus also includes means for generating an identifier set by adding a resource UE from the resource UEs to an identifier set when the received signal power of the resource UEs is greater than an identifier-sending UE received signal power threshold. The apparatus also includes means for transmitting the identifier set to the identifier-receiving UE.

[0014] In another aspect of the present disclosure, a non-transitory computer-readable medium having program code recorded thereon for wireless communication at an identifier-sending UE is disclosed. The program code is for wireless communication. The program code is executed by a processor and includes program code for measuring the received signal power of multiple resource UEs. The program code also includes program code for generating an identifier set by adding resource UEs in the resource UEs to an identifier set when the received signal power of the resource UEs is greater than an identifier-sending UE received signal power threshold. The program code also includes program code for transmitting the identifier set to the identifier-receiving UE.

[0015] Another aspect of the present disclosure relates to an apparatus for wireless communication at an identifier-sending UE, the apparatus comprising a processor and a memory communicatively coupled to the processor and storing instructions, the instructions, when executed by the processor, causing the apparatus to measure received signal power of resource UEs. Execution of the instructions further causes the apparatus to generate a set of identifiers by adding resource UEs in the set of identifiers when the received signal power of the resource UEs is greater than an identifier-sending UE received signal power threshold. Execution of the instructions further causes the apparatus to transmit the set of identifiers to the identifier-receiving UE.

[0016] Aspects generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and processing systems substantially as described with reference to and as illustrated by the accompanying drawings and description.

[0017] The foregoing has outlined rather broadly the features and technical advantages of the examples according to the present disclosure so that the following detailed description may be better understood. Additional features and advantages will be described below. The disclosed concepts and specific examples may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The features of the concepts disclosed herein, their organization and method of operation, and associated advantages will be better understood from the following description when considered in conjunction with the accompanying drawings. Each of the figures is provided for the purpose of illustration and description and not as a definition of limitations to the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to enable a detailed understanding of the features of the present disclosure, reference may be made to various aspects for description, some of which are illustrated in the accompanying drawings. However, it should be noted that the drawings illustrate only certain typical aspects of the present disclosure and are therefore not to be considered as limiting the scope thereof, as the description may admit of other equally effective aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0019] Figure 1 is a schematic diagram illustrating an example of a wireless communication system and an access network.

[0020] Figure 2A 、 Figure 2B 、 Figure 2C and Figure 2D are diagrams illustrating examples of a first fifth generation (5G) New Radio (NR) frame, a downlink (DL) channel within a 5G NR subframe, a second 5G NR frame, and an uplink (UL) channel within a 5G NR subframe, respectively.

[0021] Figure 3 is a schematic diagram illustrating an example of a base station and a user equipment (UE) in an access network.

[0022] Figures 4 and 5 is a schematic diagram illustrating an example of a vehicle-to-everything (V2X) system according to various aspects of the present disclosure.

[0023] Figure 6 is a schematic diagram illustrating an example of a radio frequency spectrum according to various aspects of the present disclosure.

[0024] Figure 7 is a diagram illustrating an example of resource allocation according to various aspects of the present disclosure.

[0025] Figure 8 is a diagram illustrating an example of a hardware implementation for an apparatus employing a processing system according to various aspects of the present disclosure.

[0026] Figure 9 is a diagram illustrating an example process performed by, for example, a UE according to various aspects of the present disclosure.

[0027] Figure 10 is a diagram illustrating an example process performed by, for example, a UE according to various aspects of the present disclosure. DETAILED DESCRIPTION

[0028] Various aspects of the present disclosure are described below with reference to the accompanying drawings. However, the present disclosure can be embodied in many different forms and should not be construed as being limited to any specific structure or function presented throughout the present disclosure. On the contrary, these aspects are provided to make the present disclosure detailed and complete, and to convey the scope of the present disclosure to those skilled in the art. Based on the teachings herein, those skilled in the art should understand that the scope of the present disclosure is intended to cover any aspect of the disclosure disclosed herein, whether independent of any other aspect of the disclosure or in combination with any other aspect of the disclosure to implement. For example, any number of aspects set forth can be used to implement an apparatus or practice method. In addition, the scope of the present disclosure is intended to cover such an apparatus or method that is practiced using other structures, functions, or structures and functions in addition to or different from the various aspects of the disclosure set forth. It should be understood that any aspect of the disclosed disclosure can be embodied by one or more elements of the claims.

[0029] Several aspects of telecommunications systems will now be presented with reference to various devices and techniques. These devices and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "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 overall system.

[0030] It should be noted that although various aspects may be described using terminology generally associated with 5G and beyond wireless technologies, aspects of the present disclosure may be applied in communication systems based on other generations, such as and including 3G and / or 4G technologies.

[0031] In a cellular communication network, wireless devices can typically communicate with each other via one or more network entities (such as a base station or a scheduling entity). Some networks can support device-to-device (D2D) communication, which enables the use of a direct link between devices (e.g., without going through a base station, a repeater, or another node) to discover and communicate with nearby devices. D2D communication can implement mesh networking and device-to-network relay functionality. Some examples of D2D technologies include Bluetooth pairing, Wi-Fi Direct, Miracast, and LTE-D. D2D communication can also be referred to as point-to-point (P2P) communication or sidelink communication.

[0032] D2D communication can be implemented using licensed or unlicensed frequency bands. In addition, D2D communication can avoid the overhead involved in routing to and from the base station. Therefore, D2D communication can increase throughput, reduce latency and / or improve energy efficiency.

[0033] One type of D2D communication can include vehicle-to-everything (V2X) communication. V2X communication can help autonomous vehicles communicate with each other. For example, an autonomous vehicle can include multiple sensors (e.g., light detection and ranging (LiDAR), radar, cameras, etc.). In most cases, the sensors of an autonomous vehicle are line-of-sight sensors. In contrast, V2X communication can allow autonomous vehicles to communicate with each other in non-line-of-sight situations.

[0034] For example, when two vehicles approach an intersection, various bits of information collected by the sensors of both vehicles can be shared via V2X communication. This information can be shared even when there is no direct line of sight between the two vehicles. Furthermore, the information collected by the sensors of the first vehicle can be shared with other vehicles or devices within the communication coverage area.

[0035] In order to improve the relevance of sidelink transmission, when the UE supports autonomous resource selection, the UEs can coordinate with each other to share resource information. That is, the resource UE can identify the communication resource. The communication resource identified by the resource UE can be referred to as sensing information. The resource UE can send the sensing information (e.g., the identified communication resource) to a resource receiving UE, such as an identifier sending UE or an identifier receiving UE. The resource receiving UE can consider the sensing information when selecting resources for sidelink transmission. In this example, the resource receiving UE can also perform measurements to identify the communication resource. Therefore, the resource receiving UE can combine the sensing information with the communication resource it identifies. Aspects of the present disclosure are intended to improve coordination between UEs.

[0036] Figure 1 1 is a schematic diagram illustrating an example of a wireless communication system and access network 100. The wireless communication system (also referred to as a wireless wide area network (WWAN)) includes a base station 102, a UE 104, an evolved packet core (EPC) 160, and another core network 190 (e.g., a 5G core (5GC)). The base station 102 may include a macro cell (a high-power cellular base station) and / or a small cell 102' (a low-power cellular base station). The macro cell includes a base station. The small cell 102' may include a femto cell, a pico cell, and a micro cell.

[0037] A base station 102 configured for 4G LTE (which is generally referred to as the Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) may interface with the EPC 160 via a backhaul link 132 (e.g., an S1 interface). A base station 102 configured for 5G NR (which is generally referred to as the Next Generation RAN (NG-RAN)) may interface with the core network 190 via a backhaul link 184. The base station 102 may perform one or more of the following functions, among other things: transmission of user data, radio channel encryption and decryption, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection establishment and release, load balancing, distribution of non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), subscriber and device tracking, RAN information management (RIM), paging, positioning, and delivery of warning information. Base stations 102 may communicate with each other directly or indirectly (eg, through EPC 160 or core network 190) via backhaul links 134 (eg, an X2 interface). Backhaul links 134 may be wired or wireless.

[0038] Base stations 102 can communicate wirelessly with UEs 104. Each of base stations 102 can provide communication coverage for a corresponding geographic coverage area 110. There may be overlapping geographic coverage areas 110. For example, a small cell 102' can have a coverage area 110' that overlaps with the coverage area 110 of one or more macro base stations 102. A network that includes both small cells and macro cells can be referred to as a heterogeneous network. A heterogeneous network can also include a home evolved Node B (eNB) (HeNB), which can provide services to a restricted group called a closed subscriber group (CSG). The communication link 120 between base station 102 and UE 104 can include uplink (UL) (also known as reverse link) transmissions from UE 104 to base station 102 and / or downlink (DL) (also known as forward link) transmissions from base station 102 to UE 104. The communication link 120 can use multiple-input and multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and / or transmit diversity. The communication link can be over one or more carriers. Base station 102 / UE 104 can use spectrum with a bandwidth of up to Y MHz (e.g., 5 MHz, 10 MHz, 15 MHz, 20 MHz, 100 MHz, 400 MHz, etc.) per carrier allocated in carrier aggregation for a total of up to Yx MHz (x component carriers) for transmission in each direction. The carriers may be adjacent or non-adjacent to each other. The allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated for DL than for UL). Component carriers may include a primary component carrier and one or more secondary component carriers. The primary component carrier may be referred to as a primary cell (PCell), and the secondary component carrier may be referred to as a secondary cell (SCell).

[0039] Some UEs 104 may communicate with each other using a device-to-device (D2D) communication link 158. The D2D communication link 158 may use the DL / UL WWAN spectrum. The D2D communication link 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH). D2D communication may be accomplished through various wireless D2D communication systems, such as FlashLinQ, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard, LTE, or NR.

[0040] The wireless communication system may also include a Wi-Fi access point (AP) 150 that communicates with a Wi-Fi station (STA) 152 in the 5 GHz unlicensed spectrum via a communication link 154. When communicating in the unlicensed spectrum, the STA 152 / AP 150 may perform a clear channel assessment (CCA) to determine whether the channel is available before communicating.

[0041] Small cell 102' can operate in licensed and / or unlicensed spectrum. When operating in unlicensed spectrum, small cell 102' can employ NR and use the same 5 GHz unlicensed spectrum used by Wi-Fi AP 150. Small cell 102' employing NR in unlicensed spectrum can improve access network coverage and / or increase access network capacity.

[0042] Base station 102 (whether a small cell 102′ or a large cell (e.g., a macro base station)) may include an eNB, a gNodeB (gNB), or another type of base station. Some base stations, such as gNB 180, may operate in the traditional sub-6 GHz spectrum, millimeter wave (mmW) frequencies, and / or near-mmW frequencies for communicating with UE 104. When gNB 180 operates at or near mmW frequencies, gNB 180 may be referred to as a mmW base station. Extremely high frequency (EHF) is a portion of the radio frequency (RF) band in the electromagnetic spectrum. EHF ranges from 30 GHz to 300 GHz and has wavelengths between 1 mm and 10 mm. Radio waves in this band may be referred to as millimeter waves. Near-mmW can extend down to frequencies of 3 GHz and wavelengths of 100 mm. Super high frequency (SHF) bands extend between 3 GHz and 30 GHz and are also referred to as centimeter waves. Communications using the mmW / near-mmW radio frequency bands (e.g., 3 GHz to 300 GHz) have extremely high path loss and short range. The mmW base station gNB 180 may utilize beamforming 182 with the UE 104 to compensate for the extremely high path loss and short distance.

[0043] Base station 180 may transmit beamformed signals in one or more transmit directions 182′ to UE 104. UE 104 may receive beamformed signals from base station 180 in one or more receive directions 182′. UE 104 may also transmit beamformed signals in one or more transmit directions to base station 180. Base station 180 may receive beamformed signals in one or more receive directions from UE 104. Base station 180 / UE 104 may perform beam training to determine optimal transmit and receive directions for each of base station 180 / UE 104. The transmit and receive directions of base station 180 may be the same or different. The transmit and receive directions of UE 104 may be the same or different.

[0044] EPC 160 may include a Mobility Management Entity (MME) 162, other MMEs 164, a Serving Gateway 166, a Multimedia Broadcast Multicast Service (MBMS) Gateway 168, a Broadcast Multicast Service Center (BM-SC) 170, and a Packet Data Network (PDN) Gateway 172. MME 162 may communicate with a Home Subscriber Server (HSS) 174. MME 162 may be a control node that handles signaling between UE 104 and EPC 160. Generally, MME 162 may provide bearer and connection management. All user Internet Protocol (IP) packets are transmitted through Serving Gateway 166, which itself is connected to PDN Gateway 172. PDN Gateway 172 provides UE IP address allocation and other functions. PDN Gateway 172 and BM-SC 170 are connected to IP Services 176. IP Services 176 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS), Packet Switched (PS) streaming services, and / or other IP services. The BM-SC 170 may provide functionality for MBMS user service provisioning and delivery. The BM-SC 170 may serve as an entry point for content provider MBMS transmissions, may be used to authorize and initiate MBMS bearer services within a public land mobile network (PLMN), and may be used to schedule MBMS transmissions. The MBMS gateway 168 may be used to distribute MBMS services to base stations 102 belonging to a multicast broadcast single frequency network (MBSFN) area that broadcasts a specific service, and may be responsible for session management (start / stop) and collecting billing information related to eMBMS.

[0045] The core network 190 may include an access and mobility management function (AMF) 192, other AMFs 193, a session management function (SMF) 194, and a user plane function (UPF) 195. The AMF 192 may communicate with a unified data management (UDM) 196. The AMF 192 may be a control node that handles signaling between the UE 104 and the core network 190. Typically, the AMF 192 provides quality of service (QoS) flows and session management. All user Internet Protocol (IP) packets are transported through the UPF 195. The UPF 195 provides UE IP address allocation and other functions. The UPF 195 is connected to the IP services 197. The IP services 197 may include the Internet, an intranet, an IP multimedia subsystem (IMS), PS streaming services, and / or other IP services.

[0046] Base station 102 may also be referred to as a gNB, Node B, evolved Node B (eNB), access point, base transceiver station, radio base station, radio transceiver, transceiver function, basic service set (BSS), extended service set (ESS), transmit reception point (TRP), or some other suitable terminology. Base station 102 provides an access point to EPC 160 or core network 190 for UE 104. Examples of UE 104 include a cellular phone, a smartphone, a Session Initiation Protocol (SIP) phone, a laptop, a personal digital assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., an MP3 player), a camera, a game console, a tablet, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a healthcare device, an implant, a sensor / actuator, a display, or any other similarly functional device. Some of UE 104 may be referred to as IoT devices (e.g., a parking meter, a gas pump, a toaster, a vehicle, a heart monitor, etc.). UE 104 may also be referred to as a station, a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology.

[0047] Reference again Figure 1 In certain aspects, a receiving device (such as a UE 104) may receive sensing information from one or more other UEs 104. The UE 104 that receives the sensing information may also obtain the sensing information from its own measurements. The UE 104 may include a resource selection component 198 configured to measure a first received signal power of a plurality of UEs. The resource selection component 198 may also be configured to receive a set of identifiers from the first UE. The resource selection component 198 may also be configured to identify resources of a second UE from the plurality of UEs for future transmissions based on the first received signal power and the received set of identifiers. The resource selection component 198 may also be configured to schedule future transmissions on at least one identified resource.

[0048] Additionally or alternatively, UE 104 may include an identifier component 199 configured to measure a first received signal power of a plurality of UEs. Identifier component 199 may also be configured to generate an identifier set by adding each of the plurality of UEs to the identifier set when the first received signal power of the UE is greater than a received signal power threshold. Identifier component 199 may also be configured to send the identifier set to the identifier-receiving UE.

[0049] Although the following description may focus on 5G NR, this document may be applicable to other similar areas such as LTE, LTE-A, CDMA, GSM, and other wireless technologies.

[0050] Figure 2A is a diagram 200 illustrating an example of a first subframe within a 5G NR frame structure. Figure 2B is a diagram 230 illustrating an example of DL channels within a 5G NR subframe. Figure 2C is a diagram 250 illustrating an example of a second subframe within a 5G NR frame structure. Figure 2D 280 is a diagram illustrating an example of UL channels within a 5G NR subframe. The 5G NR frame structure may be frequency division duplex (FDD), where for a particular set of subcarriers (carrier system bandwidth), a subframe within a subcarrier set is dedicated to either DL or UL, or may be time division duplex (TDD), where for a particular set of subcarriers (carrier system bandwidth), a subframe within a subcarrier set is dedicated to both DL and UL. Figure 2A 、 Figure 2C In the example provided, it is assumed that the 5G NR frame structure is TDD, where subframe 4 is configured as slot format 28 (primarily DL), where D is DL, U is UL, and X is flexibly used between DL / UL, and subframe 3 is configured as slot format 34 (primarily UL). Although subframes 3 and 4 are shown with slot formats 34 and 28, respectively, any particular subframe can be configured with any of the various available slot formats 0-61. Slot formats 0 and 1 are DL and UL, respectively. Other slot formats 2-61 include a mix of DL, UL, and flexible symbols. The UE is configured with the slot format via the received slot format indicator (SFI) (dynamically configured via DL control information (DCI), or semi-statically / statically configured via radio resource control (RRC) signaling). Note that the following description also applies to the 5G NR frame structure for TDD.

[0051] Other wireless communication technologies may have different frame structures and / or different channels. A frame (10 ms) may be divided into 10 equally sized subframes (1 ms). Each subframe may include one or more time slots. A subframe may also include a mini-slot, which may include 7, 4, or 2 symbols. Depending on the slot configuration, each slot may include 7 or 14 symbols. For slot configuration 0, each slot may include 14 symbols, and for slot configuration 1, each slot may include 7 symbols. The symbols on the DL may be cyclic prefix (CP) OFDM (CP-OFDM) symbols. The symbols on the UL may be CP-OFDM symbols (for high throughput scenarios) or discrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbols (also known as single carrier frequency division multiple access (SC-FDMA) symbols) (for power-limited scenarios; limited to single-stream transmission). The number of slots within a subframe is based on the slot configuration and parameter set. For slot configuration 0, different parameter sets μ0 through 5 allow for 1, 2, 4, 8, 16, and 32 slots per subframe, respectively. For slot configuration 1, different parameter sets 0 through 2 allow for 2, 4, and 8 slots per subframe, respectively. Thus, for slot configuration 0 and parameter set μ, there are 14 symbols per slot and 2μ slots per subframe. The subcarrier spacing and symbol length / duration are functions of the parameter set. The subcarrier spacing can be equal to 2^μ*15kHz, where μ is parameter set 0 through 5. Thus, parameter set μ=0 has a subcarrier spacing of 15kHz, and parameter set μ=5 has a subcarrier spacing of 480kHz. The symbol length / duration is inversely proportional to the subcarrier spacing. Figures 2A to 2D An example is provided for slot configuration 0 with 14 symbols per slot and parameter set μ=0 with 1 slot per subframe. The subcarrier spacing is 15 kHz and the symbol duration is approximately 66.7 μs.

[0052] The resource grid can represent the frame structure. Each time slot includes a resource block (RB) (also known as a physical RB (PRB)) extending over 12 consecutive subcarriers. The resource grid is divided into multiple resource elements (REs). The number of bits carried by each RE depends on the modulation scheme.

[0053] like Figure 2A As shown, some of the REs carry reference (pilot) signals (RS) for the UE. The RSs may include demodulation RSs (DM-RSs) for channel estimation at the UE (indicated as Rx for one specific configuration, where 100x is the port number, but other DM-RS configurations are possible) and channel state information reference signals (CSI-RSs). The RSs may also include beam measurement RSs (BRSs), beam refinement RSs (BRRSs), and phase tracking RSs (PT-RSs).

[0054] Figure 2B Examples of various DL channels within a subframe of a frame are shown. The physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs), each CCE includes nine RE groups (REGs), and each REG includes four consecutive REs in an OFDM symbol. The primary synchronization signal (PSS) can be within symbol 2 of a specific subframe of the frame. The PSS is used by the UE 104 to determine the subframe / symbol timing and the physical layer identification. The secondary synchronization signal (SSS) can be within symbol 4 of a specific subframe of the frame. The UE uses the SSS to determine the physical layer cell identification group number and the radio frame timing. Based on the physical layer identification and the physical layer cell identification group number, the UE can determine the physical cell identifier (PCI). Based on the PCI, the UE can determine the position of the above-mentioned DM-RS. The physical broadcast channel (PBCH) carrying the master information block (MIB) can be logically grouped with the PSS and SSS to form a synchronization signal (SS) / PBCH block. The MIB provides a number of RBs in the system bandwidth and a system frame number (SFN). The Physical Downlink Shared Channel (PDSCH) carries user data, broadcast system information not sent through the PBCH (such as System Information Blocks (SIBs)), and paging messages.

[0055] like Figure 2C As shown, some of the REs carry DM-RSs for channel estimation at the base station (indicated as R for one specific configuration, but other DM-RS configurations are possible). The UE may transmit DM-RSs for the physical uplink control channel (PUCCH) and DM-RSs for the physical uplink shared channel (PUSCH). The PUSCH DM-RS may be transmitted in the first one or two symbols of the PUSCH. The PUCCH DM-RS may be transmitted in different configurations depending on whether a short or long PUCCH is transmitted and the specific PUCCH format used. Although not shown, the UE may transmit a sounding reference signal (SRS). The SRS may be used by the base station for channel quality estimation to enable frequency-dependent scheduling on the UL.

[0056] Figure 2D Examples of various UL channels within a subframe of a frame are shown. The PUCCH may be located as indicated in one configuration. The PUCCH carries uplink control information (UCI) (such as a scheduling request), channel quality indicator (CQI), precoding matrix indicator (PMI), rank indicator (RI), and hybrid automatic repeat request (HARQ) acknowledgement (ACK) / negative ACK (NACK) feedback. The PUSCH carries data and may additionally be used to carry a buffer status report (BSR), a power headroom report (PHR), and / or UCI.

[0057] Figure 33 is a block diagram of a base station 310 communicating with a UE 350 in an access network. In the DL, IP packets from the EPC 160 may be provided to a controller / processor 375. The controller / processor 375 implements layer 3 and layer 2 functionality. Layer 3 includes the radio resource control (RRC) layer, and layer 2 includes the service data adaptation protocol (SDAP) layer, the packet data convergence protocol (PDCP) layer, the radio link control (RLC) layer, and the medium access control (MAC) layer. The controller / processor 375 provides RRC layer functions associated with broadcasting of system information (e.g., MIB, SIB), RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release), inter-radio access technology (RAT) mobility, and measurement configuration for UE measurement reporting; PDCP layer functions associated with header compression / decompression, security (ciphering, deciphering, integrity protection, integrity verification), and handover support functions; RLC layer functions associated with transmission of upper layer packet data units (PDUs), error correction through automatic repeat request (ARQ), concatenation, segmentation, and reassembly of RLC service data units (SDUs), resegmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functions associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs into transport blocks (TBs), demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel priority.

[0058] The transmit (TX) processor 316 and receive (RX) processor 370 implement layer 1 functions associated with various signal processing functions. Layer 1 (which includes the physical (PHY) layer) can include error detection on the transport channel, forward error correction (FEC) decoding of the transport channel, interleaving, rate matching, mapping to the physical channel, modulation / demodulation of the physical channel, and MIMO antenna processing. The TX processor 316 handles the mapping to the signal constellation based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-phase shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM)). The decoded and modulated symbols can then be divided into parallel streams. Each stream can then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., a pilot) in the time and / or frequency domain, and then combined together using an inverse fast Fourier transform (IFFT) to produce a physical channel carrying a time-domain OFDM symbol stream. The OFDM stream is spatially pre-decoded to produce multiple spatial streams. Channel estimates from a channel estimator 374 can be used to determine the coding and modulation schemes, as well as for spatial processing. The channel estimates can be derived from a reference signal and / or channel condition feedback transmitted by the UE 350. Each spatial stream can then be provided to a different antenna 320 via a separate transmitter 318TX. Each transmitter 318TX can modulate an RF carrier with its own spatial stream for transmission.

[0059] At the UE 350, each receiver 354RX receives a signal via its respective antenna 352. Each receiver 354RX recovers the information modulated onto the RF carrier and provides the information to a receive (RX) processor 356. The TX processor 368 and the RX processor 356 implement layer 1 functions associated with various signal processing functions. The RX processor 356 can perform spatial processing on the information to recover any spatial streams destined for the UE 350. If multiple spatial streams are destined for the UE 350, the RX processor 356 can combine them into a single OFDM symbol stream. The RX processor 356 then converts the OFDM symbol stream from the time domain to the frequency domain using a fast Fourier transform (FFT). The frequency domain signal includes a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols on each subcarrier, as well as the reference signal, are recovered and demodulated by determining the most likely signal constellation point transmitted by the base station 310. These soft decisions can be based on the channel estimates calculated by the channel estimator 358. The soft decisions are then decoded and deinterleaved to recover the data and control signals originally sent on the physical channel by the base station 310. The data and control signals are then provided to the controller / processor 359, which implements layer 3 and layer 2 functionality.

[0060] The controller / processor 359 may be associated with a memory 360 that stores program codes and data. The memory 360 may be referred to as a computer-readable medium. In the UL, the controller / processor 359 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover IP packets from the EPC 160. The controller / processor 359 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0061] Similar to the functions described in conjunction with DL transmission through the base station 310, the controller / processor 359 provides RRC layer functions associated with system information (e.g., MIB, SIB) acquisition, RRC connection, and measurement reporting; PDCP layer functions associated with header compression / decompression and security (encryption, decryption, integrity protection, integrity verification); RLC layer functions associated with transmission of upper layer PDUs, error correction through ARQ, concatenation, segmentation and reassembly of RLC SDUs, resegmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functions associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs to TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel priority.

[0062] The TX processor 368 may select an appropriate coding and modulation scheme and facilitate spatial processing using channel estimates derived by the channel estimator 358 from a reference signal or feedback transmitted by the base station 310. The spatial streams generated by the TX processor 368 may be provided to different antennas 352 via separate transmitters 354TX. Each transmitter 354TX may modulate an RF carrier with a respective spatial stream for transmission.

[0063] UL transmissions are processed at the base station 310 in a manner similar to that described in conjunction with the receiver functionality at the UE 350. Each receiver 318RX receives a signal through its respective antenna 320. Each receiver 318RX recovers information modulated onto an RF carrier and provides the information to the RX processor 370.

[0064] The controller / processor 375 may be associated with a memory 376 that stores program codes and data. The memory 376 may be referred to as a computer-readable medium. In the UL, the controller / processor 375 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover IP packets from the UE 350. The IP packets from the controller / processor 375 may be provided to the EPC 160. The controller / processor 375 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0065] At least one of the TX processor 368, the RX processor 356, and the controller / processor 359 may be configured to combine Figure 1 The resource selection component 198 and / or the identifier component 199 may be configured to perform various aspects. In addition, at least one of the TX processor 316, the RX processor 370, and the controller / processor 375 may be configured to combine Figure 1 The resource selection component 198 and / or identifier component 199 are used to perform various aspects.

[0066] Figure 4 is a schematic diagram of a device-to-device (D2D) communication system 400 (including V2X communication) in accordance with various aspects of the present disclosure. For example, the D2D communication system 400 can include V2X communication (e.g., a first UE 450 communicating with a second UE 451). In some aspects, the first UE 450 and / or the second UE 451 can be configured to communicate in a licensed radio frequency spectrum and / or a shared radio frequency spectrum. The shared radio frequency spectrum can be unlicensed, and thus a variety of different technologies can communicate using the shared radio frequency spectrum, including New Radio (NR), LTE, Advanced LTE, Licensed Assisted Access (LAA), Dedicated Short Range Communication (DSRC), MuLTEFire, 4G, etc. The foregoing list of technologies should be considered illustrative and is not meant to be exhaustive.

[0067] The D2D communication system 400 can use NR radio access technology. Of course, other radio access technologies, such as LTE radio access technology, can be used. In D2D communication (e.g., V2X communication or vehicle-to-vehicle (V2V) communication), UEs 450 and 451 can be on the networks of different mobile network operators (MNOs). Each of the networks can operate in its own radio frequency spectrum. For example, the air interface (e.g., Uu interface) to the first UE 450 can be on one or more frequency bands different from the air interface of the second UE 451. The first UE 450 and the second UE 451 can communicate via a sidelink component carrier (e.g., via a PC5 interface). In some examples, the MNO can schedule sidelink communications between or among the UEs 450 and 451 in a licensed radio frequency spectrum and / or a shared radio frequency spectrum (e.g., a 5 GHz radio spectrum band).

[0068] The shared radio frequency spectrum may be unlicensed, and thus different technologies may communicate using the shared radio frequency spectrum. In some aspects, D2D communications (e.g., sidelink communications) between or among UEs 450, 451 are not scheduled by the MNO. The D2D communication system 400 may also include a third UE 452.

[0069] For example, the third UE 452 may operate on the first network 410 (e.g., of the first MNO) or another network. The third UE 452 may perform D2D communication with the first UE 450 and / or the second UE 451. The first base station 420 (e.g., gNB) may communicate with the third UE 452 via a downlink (DL) carrier 432 and / or an uplink (UL) carrier 442. DL communication may use various DL resources (e.g., DL subframes ( Figure 2A ) and / or DL channel ( Figure 2B )). Various UL resources (eg, UL subframes ( Figure 2C ) and UL channels ( Figure 2D ))'s UL carrier 442 to perform UL communication.

[0070] For example, as in Figures 1 to 3 As described in the foregoing, a first network 410 operates in a first spectrum and includes a first base station 420 (e.g., gNB) for communicating with at least a first UE 450. The first base station 420 (e.g., gNB) may communicate with the first UE 450 via a DL carrier 430 and / or an UL carrier 440. DL communication may use various DL resources (e.g., DL subframes ( Figure 2A ) and / or DL channel ( Figure 2B )). Various UL resources (eg, UL subframes ( Figure 2C ) and UL channels ( Figure 2D ))'s UL carrier 440 to perform UL communication.

[0071] In some aspects, the second UE 451 can be on a different network than the first UE 450. In some aspects, the second UE 451 can be on a second network 411 (e.g., of a second MNO). Figures 1 to 3 As described in , the second network 411 can operate in a second spectrum (e.g., a second spectrum different from the first spectrum) and can include a second base station 421 (e.g., a gNB) for communicating with the second UE 451.

[0072] The second base station 421 can communicate with the second UE 451 via the DL carrier 431 and the UL carrier 441. Figure 2A ) and / or DL channel ( Figure 2B )) performs DL communication. Figure 2C ) and / or UL channel ( Figure 2D ))'s UL carrier 441 to perform UL communication.

[0073] In a conventional system, the first base station 420 and / or the second base station 421 allocate resources for device-to-device (D2D) communication (e.g., V2X communication and / or V2V communication) to the UE. For example, the resources may be a UL resource pool, which may be either orthogonal (e.g., one or more frequency division multiplexing (FDM) channels) or non-orthogonal (e.g., code division multiplexing (CDM) / resource spread multiple access (RSMA) in each channel). The first base station 420 and / or the second base station 421 may configure the resources via PDCCH (e.g., a faster method) or RRC (e.g., a slower method).

[0074] In some systems, each UE 450, 451 autonomously selects resources for D2D communication. For example, each UE 450, 451 can sense and analyze channel occupancy during a sensing window. UEs 450, 451 can use the sensing information to select resources from the sensing window. As discussed, one UE 451 can assist another UE 450 in performing resource selection. The assisting UE 451 can be referred to as a receiver UE or partner UE, which can potentially inform the transmitter UE 450. The transmitter UE 450 can send information to the receiver UE 451 via sidelink communication.

[0075] D2D communication (e.g., V2X communication and / or V2V communication) may be performed via one or more sidelink carriers 470, 480. For example, the one or more sidelink carriers 470, 480 may include one or more channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH).

[0076] In some examples, the sidelink carriers 470, 480 can operate using a PC5 interface. The first UE 450 can transmit to one or more (e.g., multiple) devices (including the second UE 451) via the first sidelink carrier 470. The second UE 451 can transmit to one or more (e.g., multiple) devices (including the first UE 450) via the second sidelink carrier 480.

[0077] In some aspects, the UL carrier 440 and the first sidelink carrier 470 can be aggregated to increase bandwidth. In some aspects, the first sidelink carrier 470 and / or the second sidelink carrier 480 can share a first spectrum (with the first network 410) and / or a second spectrum (with the second network 411). In some aspects, the sidelink carriers 470, 480 can operate in an unlicensed / shared radio frequency spectrum.

[0078] In some aspects, sidelink communication over a sidelink carrier may occur between a first UE 450 and a second UE 451. In one aspect, the first UE 450 may perform sidelink communication with one or more (e.g., multiple) devices (including the second UE 451) via a first sidelink carrier 470. For example, the first UE 450 may send a broadcast transmission to multiple devices (e.g., the second UE 451 and the third UE 452) via the first sidelink carrier 470. The second UE 451 (e.g., among other UEs) may receive the broadcast transmission. Additionally or alternatively, the first UE 450 may send a multicast transmission to multiple devices (e.g., the second UE 451 and the third UE 452) via the first sidelink carrier 470. The second UE 451 and / or the third UE 452 (e.g., among other UEs) may receive the multicast transmission. Multicast transmissions may be connectionless or connection-oriented. Multicast transmissions may also be referred to as groupcast transmissions.

[0079] Furthermore, first UE 450 may transmit a unicast transmission to a device (such as second UE 451) via first sidelink carrier 470. Second UE 451 (e.g., among other UEs) may receive such unicast transmission. Additionally or alternatively, second UE 451 may perform sidelink communications with one or more (e.g., multiple) devices (including first UE 450) via second sidelink carrier 480. For example, second UE 451 may transmit a broadcast transmission to multiple devices via second sidelink carrier 480. First UE 450 (e.g., among other UEs) may receive such broadcast transmission.

[0080] In another example, second UE 451 can send a multicast transmission to multiple devices (e.g., first UE 450 and third UE 452) via second sidelink carrier 480. First UE 450 and / or third UE 452 (e.g., among the other UEs) can receive such multicast transmission. In addition, second UE 451 can send a unicast transmission to a device (such as first UE 450) via second sidelink carrier 480. First UE 450 (e.g., among the other UEs) can receive such unicast transmission. Third UE 452 can communicate in a similar manner.

[0081] In some aspects, for example, such sidelink communication between a first UE 450 and a second UE 451 on a sidelink carrier may occur without an MNO allocating resources for such communication (e.g., one or more portions of resource blocks (RBs), time slots, frequency bands, and / or channels associated with the sidelink carriers 470, 480) and / or without scheduling such communication. Sidelink communication may include traffic communication (e.g., data communication, control communication, paging communication, and / or system information communication). In addition, sidelink communication may include sidelink feedback communication associated with the traffic communication (e.g., transmission of feedback information for previously received traffic communication). The sidelink communication may employ at least one sidelink communication structure having at least one feedback symbol. The feedback symbols of the sidelink communication structure may be allocated for any sidelink feedback information that may be transmitted in a device-to-device (D2D) communication system 400 between devices (e.g., the first UE 450, the second UE 451, and / or the third UE 452).

[0082] As discussed, the UE may be a vehicle (eg, UE 450, 451), a mobile device (eg, 452), or another type of device. In some cases, the UE may be a special UE, such as a roadside unit (RSU). Figure 5 1 shows an example of a V2X system 500 with an RSU 510 according to aspects of the present disclosure. Figure 5 As shown, a transmitter UE 504 transmits data to an RSU 510 and a receiving UE 502 (e.g., a receiving vehicle) via a sidelink transmission 512. Additionally or alternatively, the RSU 510 may transmit data to the transmitter UE 504 via the sidelink transmission 512. The RSU 510 may forward the data received from the transmitter UE 504 to a cellular network (e.g., a gNB) 508 via an UL transmission 514. The gNB 508 may transmit the data received from the RSU 510 to another UE 506 (e.g., another vehicle) via a DL transmission 516.

[0083] The RSU 510 can be integrated with traffic infrastructure (e.g., traffic lights, light poles, etc.). Figure 5 As shown, RSU 510 is a traffic signal located on one side of road 520. Additionally or alternatively, RSU 510 may be a standalone unit.

[0084] As discussed, a UE (e.g., a transmitter UE) can use sensing information provided by other UEs (e.g., a receiving UE or a partner UE) to identify communication resources for sidelink communication (e.g., sidelink transmission). Thus, the transmitter UE can use sensing information obtained through its own measurements as well as sensing information provided by other UEs. Using a combination of sensing information can reduce conflicts, such as those caused by half-duplex and hidden node problems.

[0085] In order to reduce network overhead and improve throughput, the type of information shared between UEs can be preconfigured. In one configuration, a time window (e.g., milliseconds (ms) or time slots) is configured for the UE. The time window can be a future time period. Based on the transmissions scheduled during the time window, the UE can know the available resources and unavailable resources (e.g., channels or subchannels) in the time window. The time window can be configured via signaling from the base station (e.g., RRC / SIB) or be preconfigured for out-of-coverage operations. The amount of shared sensing information can correspond to the size of the time window. For example, if the time window is 5 ms, the UE shares the information obtained during the 5 ms sensing window.

[0086] The UE may perform V2X communication via one or more allocated sub-channels. Figure 6 An example of a radio frequency spectrum 600 with a dedicated radio frequency portion for V2X communications is shown. In this example, the spectrum 600 shows a radio frequency range from 5.850 GHz to 5.925 GHz. The spectrum 600 is not limited to 5.850 GHz to 5.925 GHz.

[0087] Based on the radio frequency spectrum 600, one or more portions may be allocated for V2X communication. As an example, a 20 MHz portion 602 (e.g., channel 175) from 5.865 GHz to 5.885 GHz and another 20 MHz portion 604 (e.g., channel 181) from 5.895 GHz to 5.915 GHz may be allocated for V2X communication. Each of the two allocated radio frequency portions 602 and 604 may be divided into a plurality of subchannels. One or more subchannels may be allocated to a UE for V2X communication. In one example, the allocated radio frequency portions 602 and 604 may be divided into four separate subchannels of 5 MHz each for V2X communication.

[0088] The specific radio frequency portions allocated for V2X communications may be jurisdiction-specific. For example, radio frequency portions 602 and 604 are dedicated frequency resources for V2X communications in the United States. Different radio frequency resources may be dedicated for V2X communications in different jurisdictions.

[0089] In one configuration, the sensing information provides per-subchannel availability / occupancy in a time window, such as a preconfigured future time window. As discussed, the subchannel allocation for each UE may be different. In addition, the UE may be scheduled for transmission on one or more subchannels at a future time window. In this way, the UE may know the per-subchannel availability for the future time window. The sensing information may provide resource availability and unavailability for the future time window on a per-subchannel basis. The future time window may be configured via control signaling from the base station (such as system information block (SIB) or radio resource control (RRC) signaling), or be preconfigured for out-of-coverage operation. The sidelink UE may schedule one or more transmission resources identified as available in the sensing information shared by another sidelink UE.

[0090] Additionally or alternatively, the sensing information may share resource availability of resources from a set of resource pools. In some cases, a subset of the set of resource pools may be configured for sharing. For example, the UE may determine resource availability of resources from different resource pools. In this example, the first resource pool may not be configured for sharing sensing information, and the second resource pool may be configured for sharing sensing information. The sharing configuration may be signaled from the base station or preconfigured for out-of-coverage operation.

[0091] In some cases, a transmission from a UE (such as an uplink transmission to a base station or a sidelink transmission to another UE) may interfere with the transmission of one or more neighboring UEs. For example, a sidelink transmission from a first UE to a second UE may conflict with other transmissions to and / or from the second UE. Aspects of the present disclosure are not limited to the described conflicts; other types of interference, such as half-duplex interference, are considered. To mitigate interference, sidelink UEs can share interference avoidance information. Aspects of the present disclosure relate to sharing interference avoidance information between UEs that support autonomous resource selection, such as UEs operating in sidelink mode 2.

[0092] In one configuration, an identifier-transmitting (Tx) UE receives transmissions from one or more resource UEs. A resource UE may be an example of a UE that reserves one or more sidelink resources. A resource-sharing UE may be an example of a resource UE. Based on the received transmissions, the identifier-transmitting UE identifies resource UEs having received signal power greater than a received signal power threshold (e.g., an identifier-Tx UE received signal power threshold). In some examples, resource UEs located near an identifier-Tx UE have higher received signal power than resource UEs located farther away from the identifier-Tx UE. In such examples, a resource UE located near an identifier-Tx UE may be located farther away from an identifier-Rx UE, such that the received signal power of the resource UE may not meet the conditions at the identifier-Rx UE. For example, the received signal power may be less than the first identifier-Rx UE received signal power threshold. Despite this, the identifier-Rx UE may attempt to use one or more resources of the resource UE, resulting in a potential conflict with a transmission from the identifier-Tx UE. Therefore, the identifier-Tx UE may indicate one or more identifiers to the identifier-RX UE to reduce the likelihood of a conflict. In some examples, the identifier-RX UE excludes resources of a resource UE associated with one of the indicated identifiers. In other examples, the identifier-RX UE may apply a second identifier-Rx UE received signal power threshold to the resource UE associated with one of the indicated identifiers. The second identifier-Rx UE received signal power threshold may be greater than the first identifier-Rx UE received signal power threshold. In such examples, the identifier-RX UE may use resources, such as transmission resources of the resource UE, if the received signal power of the resource UE is greater than the second identifier-Rx UE received signal power threshold.

[0093] As described, in some embodiments, the identifier-Tx UE may generate an identifier set including one or more identifiers. Each corresponding identifier in the set corresponds to a resource UE having a received signal power greater than an identifier-Tx UE received signal power threshold. The identifier set may include a layer one (L1) ID and / or a layer two (L2) ID. An ID (such as an L1 ID) may be an example of an identifier. For ease of explanation, ID and identifier may be used interchangeably. The L1 and / or L2 IDs may be identified from packets sent by the resource UE. The identifier-Tx UE distinguishes received packets based on the L1 and / or L2 IDs. The L1 and / or L2 IDs may be set in a medium access control (MAC) header and / or control information.

[0094] As an example, a resource UE uses a twenty-four-bit ID for unicast, multicast, and / or broadcast communications. A portion of the ID may be included in the physical layer control information. The portion included in the physical layer control information may be referred to as an L1 identifier. The remaining portion may be in the MAC header. The portion in the MAC header may be referred to as an L2 identifier. As an example, sixteen bits of the identifier may be in the control information and eight bits may be in the MAC header. The identifier may be a source identifier associated with the transmission source of the packet. Alternatively, the identifier may be a destination identifier associated with the intended destination (e.g., a receiver) of the transmitted packet.

[0095] The identifier-Tx UE may transmit the identifier set to the identifier-receiving (Rx) UE via a sidelink transmission (e.g., a V2X transmission) or another type of peer-to-peer transmission. The identifier-Rx UE may receive the list. The identifier set may be transmitted in addition to or separately from the sensing information. In one embodiment, the identifier set may be periodically transmitted by the identifier-Tx UE (and periodically received by the identifier-Rx UE) at a predetermined period (e.g., once every x ms). Additionally or alternatively, the identifier set may be transmitted by the identifier-Tx UE in response to an event (e.g., a detected change in ID). That is, the identifier-Rx UE may receive the list because the identifier-Tx UE is triggered by an event. The identifier set may be provided in a MAC control element (CE), RRC signaling, or sidelink control information (SCI) (e.g., SCI phase 2).

[0096] An identifier-Rx UE may determine whether transmission resources for one or more resource UEs are available or unavailable based on a received identifier set. For example, if the resource UE is not included in the identifier set, the transmission resources of the resource UE may be available to the identifier-Rx UE. As another example, if the resource UE is included in the identifier set, the transmission resources of the resource UE may be unavailable to the identifier-Rx UE. Furthermore, the identifier-Rx UE may determine whether transmission resources for one or more resource UEs are available or unavailable based on sensing information received from multiple resource UEs. The received sensing information identifies current and / or future resources scheduled by the resource UE. For example, the identifier-Rx UE identifies available and unavailable resources for future transmissions based on the sensing information received from the one or more resource UEs. In another example, the identifier-Rx UE may apply an increased identifier-Rx UE received signal power threshold to a resource UE associated with one of the identifiers in the received identifier set. In such an example, if the received signal power of the resource UE is greater than the increased identifier-Rx UE received signal power threshold, the identifier-Rx UE may use the transmission resources of the resource UE associated with an identifier in the received identifier set.

[0097] Given the limited number of resources available for sidelink transmissions, an Identifier-Rx UE may not find available resources for future transmissions. Resources available for future transmissions may be referred to as clean resources. In some examples, to prevent transmission delays, the Identifier-Rx UE may reuse one or more resources indicated as unavailable by the Resource UE. As described, if a resource is scheduled for a future transmission by a shared UE, the resource may be unavailable.

[0098] Nevertheless, reusing resources may cause interference because both the identifier-Rx UE and the resource UE can transmit data or control information on the same subchannel. To mitigate interference, the identifier-Rx UE identifies candidate resources for reuse by establishing an identifier-Rx received signal power threshold. In one configuration, the identifier-Rx UE measures the received signal power of one or more resource UEs. When the received signal power (e.g., reference signal received power (RSRP)) of a resource UE is greater than the identifier-Rx UE received signal power threshold, the identifier-Rx UE excludes the resources of the resource UE. The excluded resources may not be reused. In addition, if the received signal power of the resource UE is less than the identifier-Rx received signal power threshold, the resource UE may be a candidate for resource reuse.

[0099] In addition to or alternatively to excluding resources based on the identifier-Rx received signal power threshold, the identifier-Rx UE may exclude resources of a resource UE included in the identifier set received from the identifier-Tx UE. That is, as described, if the resource UE is not included in the identifier set received from the identifier-Tx UE and if the received signal power measured by the identifier-Rx UE is less than the identifier-Rx received signal power threshold, the identifier-Rx UE may reuse the transmission resources of the resource UE. Furthermore, if the resource UE is included in the identifier set received from the identifier-Tx UE and / or if the received signal power measured by the identifier-Rx UE is greater than the identifier-Rx received signal power threshold, the identifier-Rx UE may not reuse the transmission resources of the resource UE. The identifier-Tx received signal power threshold may be less than the identifier-Rx received signal power threshold.

[0100] Figure 7 is a diagram illustrating an example of resource allocation according to aspects of the present disclosure. Figure 7 In the illustrated example of FIG, a plurality of UEs 702, 704, 706, 708, 712 can use some resources (such as D2D resources) to communicate via a reference Figure 5 The side link transmission 750 or side link transmission 512 described above can be communicated through a side link channel (such as the reference Figure 4 The sidelink transmission 750 is carried on the sidelink carriers 470, 480 described above. Each UE 702, 704, 706, 708, 712 can be identified by a unique ID. Figure 7 In the example of FIG, UE 702, 704, 706, 708, 712 are shown as vehicles, such as reference Figure 4 However, one or more of the UEs 702, 704, 706, 708, 712 may be such as Figure 4 The mobile device 452 described in Figure 5 The RSU 510 described in, or another type of communication device.

[0101] exist Figure 7In the illustrated example of FIG, an identifier receiving (Rx) UE 702 traveling on a road 714 communicates with an identifier transmitting (Tx) UE 704. The identifier-Rx UE 702 may measure the received signal strength (e.g., RSRP) of a first resource UE 706, a second resource UE 708, and a third resource UE 712. In addition, the first resource UE 706, the second resource UE 708, and the third resource UE 712 may share corresponding sensing information 706a, 708a, 712a with the identifier-Rx UE 702. The resource UEs 706, 708, 712 may also be referred to as partner UEs, such as in reference to FIG. Figure 4 UE 451 is described.

[0102] The shared sensing information 706a, 708a, 712a indicates available and unavailable resources (e.g., subbands S1, S2, S3, and S4) in the first resource UE 706, the second resource UE 708, and the third resource UE 712. For example, the sensing information 712a of the third resource UE 712 indicates that during the sensing period, the first (S1) and third (S3) subbands are unavailable (e.g., used), and the second (S2) and fourth (S4) subbands are available (e.g., unused). As discussed, the sensing information provides future resource availability. Aspects of the present disclosure are not limited to sharing sensing information for the four subbands S1-S4. Figure 7 The sub-bands S1-S4 shown in FIG are provided for exemplary purposes.

[0103] In one configuration, to mitigate interference, the identifier-Rx UE 702 establishes a receive power threshold (e.g., an identifier-Rx UE receive power threshold). The identifier-Rx UE 702 may identify resources for reuse based on the receive power threshold. In one configuration, when the signal strength (e.g., RSRP) of a neighboring UE 706, 708, 712 is greater than the identifier-Rx UE receive power threshold, the identifier-Rx UE 702 excludes unavailable resources of the neighboring UE 706, 708, 712 from reuse consideration.

[0104] For exemplary purposes, assume that the signal strengths of the third and second resource UEs 706 and 708 measured at Identifier-Rx UE 702 are less than the Identifier-Rx UE received power threshold. Furthermore, the signal strength of the third resource UE 712 measured at Identifier-Rx UE 702 is greater than the Identifier-Rx UE received power threshold. In this example, Identifier-Rx UE 702's transmissions on the reused resources of the third resource UE 712 will experience more interference than the interference experienced on the reused resources of the first and second resource UEs 706 and 708. Therefore, in the present example, when selecting future resources, Identifier-Rx UE 702 excludes resources used by the third resource UE 712 (e.g., S1 and S3) from reuse consideration (e.g., for future transmissions) because the signal strength of the third resource UE 712 is greater than the second UE received power threshold. Since at least one resource of the third resource UE 712 is excluded, the third resource UE 712 may be referred to as an excluded UE. Nonetheless, resources not used by the third resource UE 712 (eg, the second ( S2 ) and fourth ( S4 ) resources) may be candidates for future transmissions by the identifier-Rx UE 702 .

[0105] In one configuration, the identifier-Tx UE 704 also establishes a received power threshold (e.g., an identifier-Tx received signal power threshold) for use in selecting future resources. Figure 7 In the example of FIG. 1 , the identifier-Tx UE 704 measures the received signal power of the resource UEs 706, 708, and 712 and identifies each resource UE 706, 708, and 712 having a received signal power greater than an identifier-Tx received signal power threshold. The identifier-Tx UE 704 generates an identifier set of L1 IDs or L2 IDs corresponding to one or more resource UEs 706, 708, and 712 having a received signal power greater than the received signal power threshold. As described, the identifier-Tx received signal power threshold can be different from the identifier-Rx received signal power threshold.

[0106] For exemplary purposes, it is assumed that the received signal power of the first and third resource UEs 706 and 712 measured at the identifier-Tx UE 704 is less than the identifier-Tx received power threshold. In addition, the received signal power of the second resource UE 708 measured at the identifier-Tx UE 704 is greater than the identifier-Tx received power threshold. Because the received signal power of the second resource UE 708 is greater than the identifier-Tx received signal power threshold, the identifier-Tx UE 704 adds the L1 or L2 ID of the second resource UE 708 to the identifier set.

[0107] Identifier-Tx UE 704 transmits a set of identifiers to identifier-Rx UE 702 via V2X transmission or another type of peer-to-peer transmission (e.g., vehicle-to-vehicle (V2V) transmission). According to aspects of the present disclosure, if the IDs of resource UEs 706, 708, 712 are included in the set of identifiers, identifier-Rx UE 702 may exclude resource UEs 706, 708, 712 as resource candidates. Based on the received set of identifiers, identifier-Rx UE 702 determines that the received signal power of the second resource UE is greater than the identifier-Tx received power threshold. Therefore, identifier-Rx UE 702 also excludes at least one resource (e.g., S2) used by the second resource UE 708 from reuse consideration. Furthermore, because at least one resource of the second resource UE 708 is excluded, the second resource UE 708 may be referred to as an excluded UE.

[0108] That is to say, in Figure 7 In the example shown in FIG1 , identifier-Rx UE 702 excludes the first to third resources (S1-S3) from future transmission. As described above, the second resource (S2) can be excluded because the second resource (S2) is used by second resource UE 708, which is included in the identifier set received from identifier-Tx UE 704. The first and third resources (S1 and S3) can also be excluded because the first and third resources (S1 and S3) are used by third resource UE 712, which has a received signal power greater than the identifier-Rx UE received signal power threshold. In this example, the fourth resource (S4) is not excluded from reuse because the fourth resource (S4) is not used by the second or third resource UEs 708, 712. That is, the fourth resource (S4) can be a candidate for future transmission.

[0109] like Figure 7 As shown, the fourth resource (S4) is used by the first resource UE 706. Despite this, the received signal power of the first resource UE 706 is less than the received signal power thresholds of the identifier-Rx UE 702 and the identifier-Tx UE 704. Therefore, the identifier-Rx UE 702 may reuse one or more resources used by the first resource UE 706. That is, the identifier-Rx UE 702 may reuse the fourth resource (S4) for future transmissions. In one configuration, if the identifier-Rx UE 702 does not find any idle resources, the identifier-Rx UE 702 may adjust one or more of the first and second thresholds.

[0110] The identifier-Tx UE 704 may also share sensing information with the identifier-Rx UE 702. The identifier-Rx UE 702 may take the identifier-Tx UE resource usage into account when scheduling transmissions.

[0111] As pointed out above, Figures 5 to 7 is provided as an example. Other examples may be related to Figures 5 to 7 Different than described.

[0112] Figure 8 8 is a schematic diagram 800 illustrating an example of a hardware implementation of an apparatus 802 employing a processing system 814. The processing system 814 can be implemented with a bus architecture generally represented by a bus 824. Depending on the specific application and overall design constraints of the processing system 814, the bus 824 can include any number of interconnecting buses and bridges. The bus 824 links together various circuits (including one or more processors and / or hardware components) represented by the processor 804, the resource components 816, and the computer-readable medium / memory 806. The bus 824 can also link various other circuits, such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be described further.

[0113] The processing system 814 may be coupled to the transceiver 810 (which may be a reference Figure 3 An example of MOD / DEMOD 354 and / or includes reference to Figure 3 MOD / DEMOD 354). The transceiver 810 may be coupled to one or more antennas 820 (which may be reference Figure 3 An example of antenna 352 and / or including reference Figure 3 The transceiver 810 provides components for communicating with various other devices over a transmission medium. The transceiver 810 receives signals from one or more antennas 820, extracts information from the received signals, and provides the extracted information to the processing system 814. In addition, the transceiver 810 receives information from the processing system 814 and generates signals to be applied to the one or more antennas 820 based on the received information. The transceiver 810 receives signals from one or more partner UEs (such as Figure 7 The sensing information sent by the resource UE 706, 708, 712 described in the above text can be transmitted via a side link (such as Figure 7 The sensing information may be transmitted using the side link transmission 750 described in

[0066]

[0114] The processing system 814 includes a computer readable medium / memory 806 (which may be a reference Figure 3An example of a memory 360 and / or at least one processor 804 (which may be a reference to a memory 360) Figure 3 The processor 804 is responsible for general processing, including the execution of software stored on the computer-readable medium / memory 806. The software, when executed by the processor 804, causes the processing system 814 to perform the various functions described above for any particular device. The computer-readable medium / memory 806 may also be used to store data that is manipulated by the processor 804 when executing the software.

[0115] The processing system 814 also includes at least a resource component 816. In some embodiments, the resource component 816 may be an identifier receiving UE (such as Figure 7 In some such embodiments, resource component 816 may be configured to provide a resource component that receives an identifier UE 702 as described in the preceding text. In some such embodiments, resource component 816 may be configured to provide a resource component that receives an identifier UE 702 as described in the preceding text. Figure 7 The identifier transmission UE 708 described in the embodiment of the present invention) receives a set of identifiers to identify the identifiers transmitted by one or more resource UEs (such as Figure 7 808, 710, 712) for future transmissions. In such embodiments, the resource component 816, operating in conjunction with the antenna 820, the transceiver 810, and / or the processor 804, can be configured to measure the received signal power of the plurality of resource UEs. Furthermore, operating in conjunction with the antenna 820 and / or the transceiver 810, the resource component 816 can be configured to receive a set of identifiers from an identifier-transmitting UE. Furthermore, operating in conjunction with the processor 804, the resource component 816 can be configured to identify resources used by one or more of the plurality of resource UEs for future transmissions based on the measured received signal power and the received set of identifiers. Furthermore, operating in conjunction with the antenna 820, the transceiver 810, and / or the processor 804, the resource component 816 can be configured to schedule future transmissions on at least one identified resource.

[0116] In additional or alternative embodiments, the resource component 816 may be an identifier sending UE (such as a reference Figure 7Components of the identifier-sending UE 704 described herein. In such embodiments, the resource component 816, operating in conjunction with the antenna 820, the transceiver 810, and / or the processor 804, can be configured to measure the received signal power of a plurality of resource UEs. Furthermore, operating in conjunction with the processor 804, the resource component 816 can be configured to generate an identifier set by adding a resource UE from the plurality of resource UEs to the identifier set when the measured received signal power of the resource UE is greater than an identifier-sending UE received signal power threshold. Furthermore, operating in conjunction with the antenna 820 and / or the transceiver 810, the resource component 816 can be configured to send the identifier set to the identifier-receiving UE.

[0117] The component may be a software component running in the processor 804, resident / stored in the computer-readable medium / memory 806, one or more hardware components coupled to the processor 804, or some combination thereof. The processing system 814 may be a component of the base station 310 and may include the memory 376 and / or at least one of the TX processor 316, the RX processor 380, and the controller / processor 375. Alternatively, the processing system 814 may be the entire base station (e.g., see Figure 3 The processing system 814 may be a component of the UE 350 and may include the memory 360 and / or at least one of the TX processor 368, the RX processor 356, and the controller / processor 359. Alternatively, the processing system 814 may be the entire UE (e.g., see Figure 3 UE350).

[0118] In one configuration, an apparatus 802 for wireless communication includes means for measuring a first received signal power of a plurality of UEs (e.g., antenna 820, transceiver 810, processor 804, computer-readable medium 806, etc.); means for receiving a set of identifiers from Identifier-Tx (e.g., antenna 820, transceiver 810, processor 804, computer-readable medium 806, etc.); means for identifying resources of a second UE from the plurality of UEs for future transmissions based on the first received signal power and the received set of identifiers (e.g., resource component 816, processor 804, computer-readable medium 806, etc.); and / or means for scheduling future transmissions on at least one identified resource (e.g., transceiver 810, processor 804, resource component 816, etc.). Additionally or alternatively, the apparatus 802 for wireless communication includes means for measuring first received signal powers of a plurality of UEs (e.g., antenna 820, transceiver 810, processor 804, computer-readable medium 806, etc.); means for generating an identifier set by adding each UE in the plurality of UEs to the identifier set when the first received signal power of the UE is greater than a received signal power threshold (e.g., transceiver 810, processor 804, computer-readable medium 806, etc.); and / or means for sending the identifier set to identifier-RxUE (e.g., antenna 820, transceiver 810, processor 804, computer-readable medium 806, etc.).

[0119] The aforementioned means may be one or more of the aforementioned components of the processing system 814 configured to perform the functions listed in the aforementioned means. As described above, the processing system 814 may include the TX processor 316, the RX processor 380, and the controller / processor 375. Thus, in one configuration, the aforementioned means may be the TX processor 316, the RX processor 380, and the controller / processor 375 configured to perform the functions listed in the aforementioned means. The aforementioned means may be one or more of the aforementioned components of the processing system 814 configured to perform the functions listed in the aforementioned means. As described above, the processing system 814 may include the TX processor 368, the RX processor 356, and the controller / processor 359. Thus, in one configuration, the aforementioned means may be the TX processor 368, the RX processor 356, and the controller / processor 359 configured to perform the functions listed in the aforementioned means.

[0120] Figure 9 FIG1 is a diagram illustrating an example process 900 performed by, for example, an identifier receiving UE in accordance with various aspects of the present disclosure. Example process 900 is an example of New Radio (NR) Vehicle-to-Everything (V2X) destination identity sharing for inter-UE coordination.

[0121] like Figure 9As shown in , in some aspects, process 900 may include measuring the received signal power of one or more resource UEs (block 902). For example, an identifier receiving UE (e.g., using controller / processor 359, memory 360, etc.) may measure the received signal power of one or more resource UEs. In one example, reference Figure 7 , the identifier receiving UE may correspond to the identifier receiving UE 702, and the UE may correspond to the first resource UE 706, the second resource UE 708, and the third resource UE 712.

[0122] like Figure 9 As shown, in some aspects, process 900 may include receiving a set of identifiers from an identifier-sending UE (block 904). For example, the identifier-receiving UE (e.g., using antenna 352, RX 354, RX processor 356, controller / processor 359, memory 360, etc.) may receive the set of identifiers from the identifier-sending UE. In one example, reference Figure 7 , the identifier sending UE may correspond to the identifier sending UE 704.

[0123] like Figure 9 As shown, in some aspects, process 900 may include identifying resources to be used by resource UEs in one or more resource UEs for future transmissions based on the measured received signal power and the received set of identifiers (block 906). For example, an identifier-receiving UE (e.g., using controller / processor 359, memory 360, etc.) may identify resources to be used by resource UEs in one or more resource UEs for future transmissions based on the measured received signal power and the received set of identifiers. In one example, reference Figure 7 , at least one resource used by at least one of the resource UEs 706, 708, 712 may correspond to at least one subband S1 to S4.

[0124] In some embodiments, resources used by one or more resource UEs may be excluded from future transmissions based on measured received signal power and / or a received set of identifiers. In such embodiments, a resource may be excluded if the received signal power of the resource UE (as measured at the identifier-receiving UE) is greater than an identifier-receiving UE received signal power threshold and / or if the layer one (L1) or layer two (L2) ID of the resource UE is included in the received set of identifiers. For ease of explanation, if one or more used resources of a resource UE are excluded from use, the resource UE may be referred to as an excluded UE.

[0125] like Figure 9As shown, in some aspects, process 900 may include scheduling future transmissions on one or more identified resources (block 908). For example, the UE (e.g., using the controller / processor 359, memory 360, etc.) may schedule future transmissions on at least one identified resource.

[0126] Figure 10 FIG1 is a diagram illustrating an example process 1000 performed by, for example, a UE transmitting an identifier, in accordance with various aspects of the present disclosure. Example process 1000 is an example of NR V2X destination identity sharing for inter-UE coordination.

[0127] like Figure 10 As shown in , in some aspects, process 1000 may include measuring received signal power of one or more resource UEs (block 1002). For example, the identifier transmitting UE (e.g., using the controller / processor 359, memory 360, etc.) may measure a first received signal power of the one or more resource UEs. In one example, reference Figure 7 , the identifier sending UE may correspond to the identifier sending UE 704, and the resource UE may correspond to the first resource UE 706, the second resource UE 708, and the third resource UE 712.

[0128] like Figure 10 As shown, in some aspects, process 1000 may include generating an identifier set by adding each resource UE of the one or more resource UEs to the identifier set when the measured received signal power of the resource UE is greater than the identifier sending UE received signal power threshold (block 1004). For example, the identifier sending UE (e.g., using the controller / processor 359, memory 360, etc.) may generate an identifier set by adding a resource UE of the one or more resource UEs to the identifier set when the measured received signal power of the resource UE is greater than the received signal power threshold. In one example, reference Figure 7 The resource UEs added to the resource UE identifier set may include a first resource UE 706 , a second resource UE 708 , and a third resource UE 712 .

[0129] like Figure 10 As shown, in some aspects, process 1000 may include sending the set of identifiers to an identifier-receiving UE (block 1006). For example, the identifier-transmitting UE (e.g., using antenna 352, TX 354, TX processor 368, controller / processor 359, memory 360, etc.) may send the set of identifiers to the identifier-receiving UE. In one example, reference Figure 7 , Figure 10 The identifier receiving UE may correspond to Figure 7 The UE 702 receives the identifier of the UE.

[0130] Examples of implementation are described in the following numbered clauses:

[0131] 1. A method of wireless communication, comprising: measuring a first received signal power of a plurality of resource UEs; receiving a set of identifiers from an identifier-sending UE; identifying at least one resource used by at least one of the plurality of resource UEs for future transmission by the identifier-receiving UE based on the first received signal power and the set of identifiers; and scheduling the future transmission on the at least one identified resource.

[0132] 2. A method according to clause 1, wherein each respective identifier of the set of identifiers corresponds to a resource UE from the plurality of resource UEs, each respective resource UE in the plurality of resource UEs having one or more reserved resources; and a second received signal power of each respective resource UE corresponding to the respective identifier of the set of identifiers is greater than an identifier transmitting UE received signal power threshold.

[0133] 3. The method according to any one of clauses 1 to 2 further includes: identifying the at least one resource when the first received signal power of the at least one resource UE is less than the identifier received UE received signal power threshold and the L1 identifier or L2 identifier of the at least one resource UE is not included in the identifier set.

[0134] 4. The method according to any one of clauses 1 to 3, further comprising excluding at least one resource used by at least one excluded UE of the plurality of resource UEs for the future transmission based on at least one of the first received signal power and the set of identifiers.

[0135] 5. The method according to clause 4 further comprises excluding the at least one resource used by the at least one excluded UE when the first received signal power of the at least one excluded UE is greater than an identifier received UE received signal power threshold or the L1 identifier or the L2 identifier of the at least one excluded UE is included in the identifier set.

[0136] 6. A method as set out in clause 5, wherein the at least one excluded resource is scheduled for transmission by the at least one excluded UE.

[0137] 7. A method for wireless communication, comprising: measuring the received signal power of multiple resource UEs; when the received signal power of the resource UE is greater than an identifier sending UE received signal power threshold, generating the identifier set by adding identifiers of the resource UEs in the multiple resource UEs to the identifier set; and sending the identifier set to the identifier receiving UE.

[0138] 8. The method of clause 7, further comprising generating the set of identifiers by adding an L1 identifier or an L2 identifier of the resource UE.

[0139] 9. The method of any one of clauses 7 to 8, further comprising transmitting the set of identifiers periodically at a predetermined period or in response to an event.

[0140] 10. The method of clause 9, wherein the event comprises a detected change of an identifier, each of the plurality of resource UEs having a different identifier.

[0141] The above disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired from practice of the aspects.

[0142] As used herein, the term "component" is intended to be broadly interpreted as hardware, firmware, and / or a combination of hardware and software. As used herein, a processor is implemented in hardware, firmware, and / or a combination of hardware and software.

[0143] Some aspects are described herein in conjunction with thresholds. As used herein, satisfying a threshold may refer to a value greater than a threshold, greater than or equal to a threshold, less than a threshold, less than or equal to a threshold, equal to a threshold, not equal to a threshold, etc., depending on the context.

[0144] It is apparent that the systems and / or methods described herein can be implemented in various forms of hardware, firmware, and / or a combination of hardware and software. The actual dedicated control hardware or software code used to implement these systems and / or methods is not limiting in any way. Thus, the operation and behavior of the systems and / or methods are described without reference to specific software code—it being understood that software and hardware can be designed to implement the systems and / or methods based, at least in part, on the description herein.

[0145] Although specific combinations of features are cited in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of the various aspects. In fact, many of these features can be combined in ways that are not specifically cited in the claims and / or not disclosed in the specification. Although each dependent claim listed below may be directly subordinate to only one claim, the disclosure of the various aspects includes each dependent claim in combination with each other claim in the claim set. The phrase "at least one" in a list of reference items refers to any combination of those items, including single members. As an example, "at least one of a, b or c" is intended to cover a, b, c, ab, ac, bc and abc, as well as combinations with multiple identical elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc and ccc or any other order of a, b and c).

[0146] Unless expressly stated otherwise, any element, behavior or instruction used herein should not be interpreted as critical or essential. In addition, as used herein, the articles "a" and "an" are intended to include one or more items and can be used interchangeably with "one or more". In addition, as used herein, the terms "set" and "group" are intended to include one or more items (e.g., related items, unrelated items, a combination of related items and unrelated items, etc.) and can be used interchangeably with "one or more". In the case of meaning only one item, the phrase "only one" or similar language is used. In addition, as used herein, the terms "has", "have", "having" etc. are intended to be open terms. In addition, the phrase "based on" is intended to mean "based at least in part on", unless expressly stated otherwise.

Claims

1. A method for wireless communication by an identifier receiving user equipment (UE), comprising: measuring a corresponding first received signal power of each resource UE among a plurality of resource UEs; receiving a set of identifiers from an identifier-sending UE; identifying, based on the corresponding first received signal power and the set of identifiers, at least one resource used by at least one resource UE of the plurality of resource UEs for future transmissions from the identifier-receiving UE, wherein the at least one resource is identified based at least in part on the corresponding first received signal power of the at least one resource UE being less than an identifier-receiving UE received signal power threshold; as well as The future transmission is scheduled on the at least one identified resource to reuse the at least one identified resource by the identifier-receiving UE.

2. The method according to claim 1, wherein: Each identifier of the set of identifiers corresponds to a respective resource UE from the plurality of resource UEs, each resource UE of the plurality of resource UEs having one or more resources reserved; as well as The second received signal power of each resource UE corresponding to a corresponding identifier of the identifier set is greater than the identifier sending UE received signal power threshold.

3. The method according to claim 1, wherein Identifying the at least one resource is further based on the fact that the set of identifiers does not include a layer one L1 identifier or a layer two L2 identifier of the UE of the at least one resource.

4. The method according to claim 1, further comprising: At least one resource used by at least one excluded UE of the plurality of resource UEs is excluded for the future transmission based on at least one of the corresponding first received signal power or the set of identifiers.

5. The method according to claim 4, further comprising: When the corresponding first received signal power of the at least one excluded UE is greater than the identifier received UE received signal power threshold or the layer one L1 identifier or the layer two L2 identifier of the at least one excluded UE is included in the identifier set, the at least one resource used by the at least one excluded UE is excluded.

6. The method according to claim 5, wherein: The at least one excluded resource is scheduled for transmission by the at least one excluded UE.

7. An apparatus for wireless communication at an identifier receiving user equipment (UE), comprising: processor; a memory coupled to the processor; as well as instructions stored in the memory, the instructions being operable, when executed by the processor, to cause the apparatus to: measuring a corresponding first received signal power of each resource UE among a plurality of resource UEs; receiving a set of identifiers from an identifier-sending UE; identifying, based on the corresponding first received signal power and the set of identifiers, at least one resource used by at least one resource UE of the plurality of resource UEs for future transmissions from the identifier-receiving UE, wherein the at least one resource is identified based at least in part on the corresponding first received signal power of the at least one resource UE being less than an identifier-receiving UE received signal power threshold; as well as The future transmission is scheduled on the at least one identified resource to reuse the at least one identified resource by the identifier-receiving UE.

8. The apparatus according to claim 7, wherein: each identifier of the set of identifiers corresponds to a respective resource UE from the plurality of resource UEs, each resource UE of the plurality of resource UEs having one or more resources reserved; and The second received signal power of each resource UE corresponding to a corresponding identifier of the identifier set is greater than the identifier sending UE received signal power threshold.

9. The device according to claim 7, wherein Execution of the instructions further causes the apparatus to identify the at least one resource based on the set of identifiers not including a layer one L1 identifier or a layer two L2 identifier of the at least one resource UE.

10. The device according to claim 7, wherein Execution of the instructions further causes the apparatus to exclude at least one resource used by at least one excluded UE of the plurality of resource UEs for the future transmission based on at least one of the corresponding first received signal power or the set of identifiers.

11. The device according to claim 10, wherein Execution of the instructions also causes the apparatus to exclude the at least one resource used by the at least one excluded UE when the corresponding first received signal power of the at least one excluded UE is greater than an identifier received UE received signal power threshold or the layer one L1 identifier or the layer two L2 identifier of the at least one excluded UE is included in the identifier set.

12. The device according to claim 11, wherein The at least one excluded resource is scheduled for transmission by the at least one excluded UE.

13. A method for wireless communication performed by an identifier-sending user equipment (UE), comprising: measuring a corresponding received signal power of each resource UE among a plurality of resource UEs; generating the set of identifiers by adding a corresponding identifier of each resource UE in the plurality of resource UEs to a set of identifiers based on the corresponding received signal power being greater than an identifier-sending UE received signal power threshold; as well as The identifier set is sent to an identifier-receiving UE to indicate that resources of the resource UE corresponding to one of the identifiers in the identifier set are to be excluded.

14. The method according to claim 13, further comprising: The identifier set is generated by adding a layer 1 L1 identifier or a layer 2 L2 identifier of the resource UE.

15. The method of claim 13, further comprising periodically transmitting the set of identifiers at a predetermined period or in response to an event.

16. The method according to claim 15, wherein The event comprises a detected change of an identifier, each of the plurality of resource UEs having a different identifier.

17. An apparatus for wireless communication at an identifier transmitting user equipment (UE), comprising: processor; a memory coupled to the processor; as well as instructions stored in the memory, the instructions being operable, when executed by the processor, to cause the apparatus to: measuring a corresponding received signal power of each resource UE among a plurality of resource UEs; generating the set of identifiers by adding a corresponding identifier of each resource UE in the plurality of resource UEs to a set of identifiers based on the corresponding received signal power being greater than an identifier-sending UE received signal power threshold; and The identifier set is sent to an identifier-receiving UE to indicate that resources of the resource UE corresponding to one of the identifiers in the identifier set are to be excluded.

18. The device according to claim 17, wherein Execution of the instructions further causes the apparatus to generate the identifier set by adding a layer one L1 identifier or a layer two L2 identifier of the resource UE.

19. The device according to claim 17, wherein Execution of the instructions further causes the apparatus to periodically send the set of identifiers at a predetermined period or in response to an event.

20. The device according to claim 19, wherein The event comprises a detected change of an identifier, each of the plurality of resource UEs corresponding to a different identifier.

21. An apparatus for wireless communication, comprising means for performing the method according to any one of claims 1-6 and 13-16.

22. A computer-readable medium having instructions stored thereon, which, when executed by a processor, cause the processor to perform the method according to any one of claims 1-6 and 13-16.

23. A computer program product comprising computer instructions which, when executed by a processor, cause the processor to perform the method according to any one of claims 1-6 and 13-16.

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