Vehicle-to-Everything (V2X) User Equipment (UE) Coordination

Abstract

A method for wireless communication performed by a sensing user equipment (UE) includes identifying resource availability during a sensing window. The method also includes receiving a request to share resource information with a transmitting UE. The method also includes determining that a sharing condition is satisfied. The method also includes sharing the resource availability with the transmitting UE based on satisfying the sharing condition.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to U.S. patent application No. 17 / 175,529, filed on February 12, 2021, entitled “VEHICLE-TO-EVERYTHING (V2X) INTER-USER EQUIPMENT (UE) COORDINATION,” which in turn claims priority to U.S. Provisional Patent Application No. 62 / 976,940, filed on February 14, 2020, entitled “NEW RADIO (NR) VEHICLE-TO-EVERYTHING (V2X) INTER-USER EQUIPMENT (UE) COORDINATION,” the disclosures of which are expressly incorporated herein by reference in their entireties. Technical Field

[0003] Aspects of the present disclosure relate generally to communication systems, 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 that are capable of supporting communications 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 municipal, national, regional and even global levels. An example of a telecommunication standard is the fifth generation (5G) New Radio (NR). 5G NR is part of the continuous mobile broadband evolution released by the Third Generation Partnership Project (3GPP) to meet new requirements related to latency, reliability, security, scalability (e.g., Internet of Things (IoT)) and other requirements. 5G NR includes services associated with enhanced mobile broadband (eMBB), massive machine type communication (mMTC) and ultra-reliable low latency communication (URLLC). Some aspects of 5G NR may be based on the fourth generation (4G) long term evolution (LTE) standard. Further improvements to 5G NR technology are needed. These improvements may also be applicable to other multiple access technologies and telecommunication standards that employ these technologies.

[0006] The wireless communication system may include or provide support for various types of communication systems, such as vehicle-related communication systems (e.g., vehicle-to-everything (V2X) communication systems). Vehicles may use vehicle-related communication systems to improve safety and 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) communications over D2D wireless links.

[0007] As the demand for vehicle-related communications increases, different V2X communication systems compete for the same wireless communication resources. Therefore, there is a need to improve the sharing of wireless communication resources. Summary of the invention

[0008] In one aspect of the present disclosure, a wireless communication method performed by a sensing (UE) includes identifying resource availability during a sensing window. The method also includes receiving a request to share resource information with a transmitting UE. The method also includes determining that a sharing condition is satisfied. The method also includes sharing resource availability with the transmitting UE based on satisfying the sharing condition.

[0009] Another aspect of the present disclosure relates to an apparatus for wireless communication at a sensing UE. The apparatus includes a unit for identifying resource availability during a sensing window. The apparatus also includes a unit for receiving a request to share resource information with a transmitting UE. The apparatus also includes a unit for determining that a sharing condition is satisfied. The apparatus also includes a unit for sharing resource availability with a transmitting UE based on satisfying the sharing condition.

[0010] In another aspect of the present disclosure, a non-transitory computer-readable medium is disclosed on which is recorded a non-transitory program code for sensing wireless communication at a UE. The program code is executed by a processor and includes a program code for identifying resource availability during a sensing window. The program code also includes a program code for receiving a request for sharing resource information with a transmitter UE. The program code also includes a program code for determining that a sharing condition is satisfied. The program code also includes a program code for sharing resource availability with a transmitter UE based on satisfying the sharing condition.

[0011] Another aspect of the present disclosure relates to an apparatus for sensing wireless communications at a UE, the apparatus having a processor, a memory coupled to the processor, and instructions stored in the memory and operable when executed by the processor to cause the apparatus to perform the following operations: identifying resource availability during a sensing window. The instructions also cause the apparatus to receive a request to share resource information with a transmitting UE. The instructions also cause the apparatus to determine that a sharing condition is satisfied. The instructions also cause the apparatus to share resource availability with the transmitting UE based on satisfying the sharing condition.

[0012] In summary, aspects include methods, apparatus, systems, computer program products, non-transitory computer readable media, user equipment, base stations, wireless communication devices, and processing systems as fully described with reference to and as illustrated by the drawings and description.

[0013] The foregoing has been fairly broadly outlined according to the features and technical advantages of the examples of 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 easily used as the basis for modifying or designing other structures for the same purpose of performing the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. When considered in conjunction with the accompanying drawings, the characteristics of the concepts disclosed herein (both their organization and method of operation) and the associated advantages will be better understood according to the description below. Each of the figures in the accompanying drawings is provided for the purpose of illustration and description, and is not intended to be a definition of the limitations of the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to fully understand the above-mentioned features of the present disclosure, a more specific description of the invention briefly summarized above can be obtained by referring to various aspects (some of which are shown in the accompanying drawings). However, it should be noted that the accompanying drawings only illustrate certain typical aspects of the present disclosure and are therefore not considered to limit the scope of the present disclosure, as the description may allow for other equally effective aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0015] Figure 1 is a diagram illustrating an example of a wireless communication system and an access network.

[0016] Figure 2A , 2B , 2C, and 2D are diagrams illustrating examples of a first fifth generation / new radio (5G / NR) subframe, a downlink (DL) channel within a 5G / NR subframe, a second 5G / NR subframe, and an uplink (UL) channel within a 5G / NR subframe, respectively.

[0017] Figure 3is a diagram illustrating an example of a base station and a user equipment (UE) in an access network.

[0018] Figure 4 is a diagram illustrating an example of a vehicle-to-everything (V2X) system in accordance with various aspects of the present disclosure.

[0019] Figure 5 is a diagram illustrating an example of a radio frequency spectrum in accordance with various aspects of the present disclosure.

[0020] Figure 6 is a diagram illustrating an example of a sharing window according to various aspects of the present disclosure.

[0021] Figure 7 is a block diagram illustrating an example of a hardware implementation for an apparatus employing a processing system according to various aspects of the present disclosure.

[0022] Figure 8 is a flow chart illustrating a wireless communication method, for example, performed by a user equipment (UE) according to various aspects of the present disclosure. DETAILED DESCRIPTION

[0023] The following is a more complete description of various aspects of the present disclosure 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. More specifically, these aspects are provided so that the present disclosure will be thorough and complete, and the scope of the present disclosure will be fully conveyed to those skilled in the art. Based on the teachings herein, it should be understood by those skilled in the art that the scope of the present disclosure is intended to cover any aspect of the present disclosure disclosed herein, whether the aspect is implemented independently of any other aspect of the present disclosure or implemented in combination with any other aspect. For example, using any number of aspects set forth herein, a device can be implemented or a method can be implemented. In addition, the scope of the present disclosure is intended to cover such a device or method implemented using other structures, functions, or structures and functions other than the various aspects of the present disclosure set forth herein or different from the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the present disclosure disclosed herein can be embodied by one or more elements of the claims.

[0024] Several aspects of telecommunication 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. (hereinafter collectively referred to as "elements"). These elements may be implemented using hardware, software, or a combination thereof. Whether these elements are implemented in hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0025] It should be noted that although various aspects may be described herein using terms generally associated with 5G and later wireless technologies, various aspects of the present disclosure may be applied to communication systems based on other generations, such as and including 3G and / or 4G technologies.

[0026] 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 may support device-to-device (D2D) communication to discover and communicate with nearby devices using a direct link between devices (e.g., without going through a base station, a relay station, or another node). D2D communication can implement mesh networks and device-to-network relay functions. Some examples of D2D technologies include Bluetooth pairing, Wi-Fi Direct, Miracast, and LTE-D. D2D communication may also be referred to as point-to-point (P2P) or sidelink communication.

[0027] D2D communication can be implemented using licensed or unlicensed frequency bands. In addition, D2D communication can avoid the overhead associated with routing transmissions to and from base stations. Therefore, D2D communication can improve throughput, reduce latency, and / or improve energy efficiency.

[0028] Vehicle-to-everything (V2X) communication is an example of a type of D2D communication. For example, V2X communication can provide non-line-of-sight communication capabilities for autonomous vehicles. In one example, when two vehicles approach an intersection, the individual bits of information collected by the sensors of the two vehicles can be shared via V2X communication. Information can be shared even if the two vehicles do not have a direct line-of-sight path between each other. In addition, a vehicle with V2X communication capabilities can share information collected by the vehicle's sensors with other vehicles or devices within the communication coverage area. Sensors can include, for example, light detection and ranging (LiDAR), radar, cameras, etc. In most cases, the vehicle's sensors are line-of-sight sensors.

[0029] In order to improve the reliability of sidelink transmission, each UE can coordinate with each other to share resource information. As an example, the first UE can perform a sensing operation to identify a communication resource. The communication resource identified by the first UE can be referred to as sensing information. In this example, the first UE can send sensing information (e.g., an identified communication resource) to the second UE. The second UE can consider the sensing information when selecting resources for sidelink transmission. In addition, in this example, the second UE can also perform measurements to identify communication resources. Therefore, the second UE can pool the sensing information with the communication resources it identifies itself. Various aspects of the present disclosure are intended to improve coordination between UEs. In the present disclosure, the first UE can also be referred to as a sensing UE or a partner UE, and the second UE can be referred to as a transmitter UE. A partner UE can refer to a UE within the transmission range of the transmitter UE.

[0030] Figure 1 1 is a 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' includes a femto cell, a pico cell, and a micro cell.

[0031] Base stations 102 configured for 4G LTE (collectively referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) may interface with EPC 160 via a backhaul link 132 (e.g., an S1 interface). Base stations 102 configured for 5G NR (collectively referred to as Next Generation RAN (NG-RAN)) may interface with core network 190 via a backhaul link 184. Base stations 102 may perform one or more of the following functions, among other functions: 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, allocation for 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 messages. The base stations 102 may communicate with each other via a backhaul link 134 (eg, an X2 interface) directly or indirectly (eg, via the EPC 160 or the core network 190). The backhaul link 134 may be wired or wireless.

[0032] Base station 102 can communicate wirelessly with UE 104. Each base station 102 can provide communication coverage for a corresponding geographic coverage area 110. There can 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 including 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 an uplink (UL) (also called a reverse link) transmission from UE 104 to base station 102 and / or a downlink (DL) (also called a forward link) transmission from base station 102 to UE 104. The communication link 120 can use multiple-input multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming and / or transmit diversity. The communication link can be through one or more carriers. Base station 102 / UE 104 may use spectrum of up to Y MHz (e.g., 5, 10, 15, 20, 100, 400, etc. MHz) bandwidth per carrier allocated in carrier aggregation of up to Yx MHz (x component carriers) for transmission in each direction. The carriers may or may not be 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). The component carrier 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).

[0033] Some UEs 104 may communicate with each other using a device-to-device (D2D) communication link 158. The D2D communication link 158 may use 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). The D2D communication may be through various wireless D2D communication systems, such as, for example, FlashLinQ, WiMedia, Bluetooth, ZigBee, Wi-Fi based on IEEE 802.11 standards, LTE, or NR.

[0034] 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 a channel is available before communicating.

[0035] The small cell 102' may operate in a licensed spectrum and / or an unlicensed spectrum. When operating in an unlicensed spectrum, the small cell 102' may employ NR and use the same 5 GHz unlicensed spectrum as used by the Wi-Fi AP 150. The small cell 102' employing NR in the unlicensed spectrum may improve coverage of the access network and / or increase capacity of the access network.

[0036] The base station 102, whether a small cell 102' or a large cell (e.g., a macro base station), can include an eNB, a gNodeB (gNB), or another type of base station. Certain base stations, such as gNB 180, can operate in the traditional sub 6 GHz spectrum, in millimeter wave (mmW) frequencies, and / or near mmW frequencies to communicate with the UE 104. When the gNB 180 operates at mmW frequencies or near mmW frequencies, the gNB 180 can be referred to as a mmW base station. Extremely high frequency (EHF) is part of the radio frequency (RF) in the electromagnetic spectrum. EHF ranges from 30 GHz to 300 GHz with wavelengths between 1 mm and 10 mm. Radio waves in the frequency band can be referred to as millimeter waves. Near mmW can extend down to frequencies of 3 GHz with a wavelength of 100 mm. The super high frequency (SHF) band extends between 3 GHz and 30 GHz and is also called centimeter waves. Communications using mmW / near mmW radio frequency bands (eg, 3 GHz-300 GHz) have extremely high path loss and short range. The mmW base station 180 may utilize beamforming 182 with the UE 104 to compensate for the extremely high path loss and short range.

[0037] The base station 180 may transmit a beamformed signal in one or more transmit directions 182' to the UE 104. The UE 104 may receive the beamformed signal from the base station 180 in one or more receive directions 182". The UE 104 may also transmit a beamformed signal in one or more transmit directions to the base station 180. The base station 180 may receive the beamformed signal in one or more receive directions from the UE 104. The base station 180 / UE 104 may perform beam training to determine the best receive and transmit directions for each of the base station 180 / UE 104. The transmit direction and receive direction of the base station 180 may be the same or may be different. The transmit direction and receive direction of the UE 104 may be the same or may be different.

[0038] The 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. The MME 162 may communicate with a home subscriber server (HSS) 174. The MME 162 is a control node that handles signaling between the UE 104 and the EPC 160. Typically, the MME 162 provides bearer and connection management. All user Internet Protocol (IP) packets are transmitted through the serving gateway 166, which itself is connected to the PDN gateway 172. The PDN gateway 172 provides UE IP address allocation and other functions. The PDN gateway 172 and the BM-SC 170 are connected to IP services 176. The IP services 176 may include the Internet, an intranet, an IP multimedia subsystem (IMS), a PS streaming service, 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 broadcasting a particular service, and may be responsible for session management (start / stop) and collecting eMBMS-related charging information.

[0039] 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 (UDP) 195. The AMF 192 may communicate with a unified data management (UDM) 196. The AMF 192 is 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 transmitted through the UPF 195. The UPF 195 provides UE IP address allocation and other functions. The UPF 195 is connected to an IP service 197. The IP service 197 may include the Internet, an intranet, an IP multimedia subsystem (IMS), a PS streaming service, and / or other IP services.

[0040] Base station 102 may also be referred to as a gNB, a Node B, an evolved Node B (eNB), an access point, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), a transmit receive point (TRP), or some other suitable term. 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 smart phone, 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 computer, 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 similar functional device. Some UEs 104 may be referred to as IoT devices (e.g., parking meters, gas pumps, toasters, vehicles, heart monitors, 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.

[0041] Refer again Figure 1 In some 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 based on its own measurements. The UE 104 may include a merging component 198 that is configured to determine whether to merge the received sensing information with a sensing signal obtained based on its own measurements. In addition or alternatively, the UE 104 may include a sharing component 199 that is configured to identify resource availability during a sensing window. The sharing component 199 may also be configured to receive a request to share resource information with another UE 104. The sharing component 199 may also be configured to determine whether a sharing condition is met. The sharing component 199 may also be configured to share resource availability with another UE 104 based on meeting the sharing condition.

[0042] Although the following description may focus on 5G NR, the description may be applicable to other areas such as LTE, LTE-A, CDMA, GSM, and other wireless technologies.

[0043] Although the following description may focus on 5G NR, the description herein may be applicable to other similar areas such as LTE, LTE-A, CDMA, GSM, and other wireless technologies.

[0044] Figure 2A FIG200 is a diagram illustrating an example of a first subframe within a 5G / NR frame structure. Figure 2B FIG230 is a diagram illustrating an example of DL channels within a 5G / NR subframe. Figure 2C FIG250 is a diagram illustrating an example of a second subframe within a 5G / NR frame structure. Figure 2D FIG280 is a diagram illustrating an example of UL channels within a 5G / NR subframe. The 5G NR frame structure may be of frequency division duplex type (FDD), where for a particular set of subcarriers (carrier system bandwidth), subframes within the set of subcarriers are dedicated to either DL or UL; or the 5G / NR frame structure may be of time division duplex type (TDD), where for a particular set of subcarriers (carrier system bandwidth), subframes within the set of subcarriers are dedicated to both DL and UL. Figure 2A , 2C In the example provided, the 5G / NR frame structure is assumed to be of TDD type, where subframe 4 is configured with slot format 28 (primarily DL), where D is DL, U is UL, X is flexible for use between DL / UL, and subframe 3 is configured with slot format 34 (primarily UL). Although subframes 3 and 4 are shown as having slot formats 34 and 28, respectively, any particular subframe may be configured with any of the various available slot formats 0-61. Slot formats 0 and 1 are full DL and full UL, respectively. Other slot formats 2-61 include a mix of DL symbols, UL symbols, and flexible symbols. The UE is configured with a slot format by a received slot format indicator (SFI) (dynamically through DL control information (DCI) or semi-statically / statically through radio resource control (RRC) signaling). Note that the following description also applies to a TDD type 5G NR frame structure.

[0045] Other wireless communication technologies may have different frame structures and / or different channels. A frame (10ms) may be divided into 10 subframes (1ms) of equal size. Each subframe may include one or more time slots. A subframe may also include a mini-time slot, which may include 7, 4 or 2 symbols. Depending on the time slot configuration, each time slot may include 7 or 14 symbols. For time slot configuration 0, each time slot may include 14 symbols, and for time slot configuration 1, each time slot may include 7 symbols. The symbol on the DL may be a cyclic prefix (CP) OFDM (CP-OFDM) symbol. The symbol on the UL may be a CP-OFDM symbol (for high throughput scenarios) or a discrete Fourier transform (DFT) spread OFDM (DFT-S-OFDM) symbol (also known as a single carrier frequency division multiple access (SC-FDMA) symbol) (for power-limited situations; limited to single-stream transmission). The number of time slots within a subframe is based on the time slot configuration and numerology. For slot configuration 0, different digital schemes μ0 to 5 allow 1, 2, 4, 8, 16, and 32 slots per subframe, respectively. For slot configuration 1, different digital schemes 0 to 2 allow 2, 4, and 8 slots per subframe, respectively. Therefore, for slot configuration 0 and digital scheme μ, there are 14 symbols per slot and 2 per subframe. μ time slots. The subcarrier spacing and symbol length / duration are functions of the digital scheme. The subcarrier spacing may be equal to 2^μ*15kHz, where μ is the digital scheme 0 to 5. Thus, digital scheme μ=0 has a subcarrier spacing of 15kHz, and digital scheme μ=5 has a subcarrier spacing of 480kHz. The symbol length / duration is inversely proportional to the subcarrier spacing. Figures 2A-2D An example of slot configuration 0 is provided, where each slot has 14 symbols and the digital scheme μ=0, each subframe has 1 slot. The subcarrier spacing is 15 kHz and the symbol duration is approximately 66.67 μs.

[0046] The resource grid may represent the frame structure. Each slot includes a resource block (RB) (also referred to as a physical RB (PRB)) extending over 12 consecutive subcarriers. The resource grid is divided into a plurality of resource elements (REs). The number of bits carried by each RE depends on the modulation scheme.

[0047] like Figure 2A As shown in FIG. 1 , some REs carry reference (pilot) signals (RS) for UEs. RSs may include demodulation RSs (DM-RSs) for channel estimation at the UE (although indicated as Rs for one specific configuration). x, where 100x is the port number, but other DM-RS configurations are also possible) and a channel state information reference signal (CSI-RS). RS may also include a beam measurement RS (BRS), a beam refinement RS (BRRS), and a phase tracking RS (PT-RS).

[0048] Figure 2B Examples of various DL channels within a subframe of a frame are illustrated. The physical downlink control channel (PDCCH) carries DCI in 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 UE 104 uses the PSS to determine the subframe timing / symbol timing and the physical layer identity. 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 identity 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 location 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 the number of RBs in the system bandwidth and the 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.

[0049] like Figure 2C As shown in , some REs carry DM-RS for channel estimation at the base station (although indicated as R for a specific configuration, other DM-RS configurations are also possible). The UE can send DM-RS for the physical uplink control channel (PUCCH) and DM-RS for the physical uplink shared channel (PUSCH). The PUSCH DM-RS can be sent in the first one or two symbols of the PUSCH. Depending on whether a short PUCCH or a long PUCCH is sent and depending on the specific PUCCH format used, the PUCCH DM-RS can be sent in different configurations. Although not shown, the UE can send a sounding reference signal (SRS). The SRS can be used by the base station for channel quality estimation to achieve frequency-dependent scheduling on the UL.

[0050] Figure 2DAn example of various UL channels within a subframe of a frame is illustrated. The PUCCH may be located as indicated in one configuration. The PUCCH carries uplink control information (UCI), such as scheduling requests, channel quality indicator (CQI), precoding matrix indicator (PMI), rank indicator (RI), and hybrid automatic repeat request (HARQ) acknowledgement / negative acknowledgement (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.

[0051] Figure 3 3 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 the functions of layer 3 and layer 2. Layer 3 includes a radio resource control (RRC) layer, and layer 2 includes a service data adaptation protocol (SDAP) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a 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 (encryption, decryption, integrity protection, integrity verification), and handover support functions; RLC layer functions associated with transmission of upper layer packet data units (PDUs), error correction through 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 onto transport blocks (TBs), demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority processing, and logical channel prioritization.

[0052] The transmit (TX) processor 316 and the receive (RX) processor 370 implement layer 1 functions associated with various signal processing functions. Layer 1 including the physical (PHY) layer may include error detection on the transmission channel, forward error correction (FEC) encoding / decoding of the transmission channel, interleaving, rate matching, mapping to the physical channel, modulation / demodulation of the physical channel, and MIMO antenna processing. The TX processor 316 processes 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 coded 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., pilot) in the time domain and / or frequency domain, and then combined together using an inverse fast Fourier transform (IFFT) to generate a physical channel carrying a time domain OFDM symbol stream. The OFDM stream is spatially precoded to generate multiple spatial streams. Channel estimates from a channel estimator 374 may be used to determine coding and modulation schemes, as well as for spatial processing. The channel estimates may be derived from a reference signal and / or channel condition feedback transmitted by the UE 350. Each spatial stream may then be provided to a different antenna 320 via a separate transmitter 318TX. Each transmitter 318TX may modulate an RF carrier with a corresponding spatial stream for transmission.

[0053] At the UE 350, each receiver 354RX receives a signal through 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 stream destined for the UE 350. If multiple spatial streams are destined for the UE 350, they can be combined into a single OFDM symbol stream by the RX processor 356. 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 and reference signals on each subcarrier are recovered and demodulated by determining the most likely signal constellation point sent by the base station 310. These soft decisions can be based on 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 functions.

[0054] 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 an ACK and / or NACK protocol to support HARQ operations.

[0055] Similar to the functions described in conjunction with DL transmissions performed by 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 onto TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority processing, and logical channel prioritization.

[0056] Channel estimates derived by the channel estimator 358 based on a reference signal or feedback transmitted by the base station 310 may be used by the TX processor 368 to select the appropriate coding and modulation schemes and to facilitate spatial processing. 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 corresponding spatial stream for transmission.

[0057] 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 a RX processor 370.

[0058] 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, 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.

[0059] At least one of the TX processor 368, the RX processor 356, and the controller / processor 359 may be configured to perform operations related to Figure 1 In addition, at least one of the TX processor 316, the RX processor 370, and the controller / processor 375 may be configured to perform operations related to the merging component 198 and / or the shared component 199. Figure 1 Aspects related to the merged component 198 and / or shared component 199.

[0060] Figure 4 is a 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 may 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 may be configured to communicate in a licensed radio frequency spectrum and / or a shared radio frequency spectrum. The shared radio frequency spectrum may be unlicensed, and thus a variety of different technologies may use the shared radio frequency spectrum for communication, including New Radio (NR), LTE, Advanced LTE, Licensed Assisted Access (LAA), Dedicated Short Range Communication (DSRC), MuLTEFire, 4G, etc. The above list of technologies should be considered illustrative and is not meant to be exhaustive.

[0061] The D2D communication system 400 can use NR radio access technology. Of course, other radio access technologies, such as LTE wireless access technology, can also be used. In D2D communication (e.g., V2X communication, or vehicle-to-vehicle (V2V) communication), UE 450, 451 can be on the networks of different mobile network operators (MNOs). Each network 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 45 and the second UE 451 can communicate via a side chain component carrier, for example, via a PC5 interface. In some examples, the MNO can schedule side chain communications between or among UE 450, 451 in a licensed radio frequency spectrum and / or a shared radio frequency spectrum (e.g., a 5GHz radio frequency spectrum band).

[0062] The shared radio frequency spectrum may be unlicensed, so different technologies may communicate using the shared radio frequency spectrum. In some aspects, the MNO does not schedule D2D communications (eg, sidelink communications) between or among the UEs 450 , 451 . The D2D communication system 400 may also include a third UE 452 .

[0063] For example, the third UE 452 may be operated 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 (e.g., UL subframes ( Figure 2C ) and UL channels ( Figure 2D ))UL communication is performed via UL carrier 442.

[0064] The first network 410 operates in a first spectrum and includes at least a first base station 420 (e.g., a gNB) that communicates with a first UE 450, such as Figure 1-3 The first base station 420 (eg, gNB) may communicate with the first UE 450 via the DL carrier 430 and / or the UL carrier 440. The DL communication may use various DL resources (eg, DL subframes ( Figure 2A ) and / or DL ​​channel ( Figure 2B )). Various UL resources (e.g., UL subframes ( Figure 2C ) and UL channels ( Figure 2D))UL communication is performed via UL carrier 440.

[0065] 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). 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) that communicates with the second UE 451, such as Figure 1-3 As described in.

[0066] 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 via the DL carrier 439. Using various UL resources (e.g., UL subframes ( Figure 2C ) and / or UL channel ( Figure 2D ))UL communication is performed via UL carrier 441.

[0067] 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 pool of UL resources, i.e., orthogonal UL resources (e.g., one or more FDM channels) and non-orthogonal UL resources (e.g., code division multiple access (CDM) / resource extension multiple access (RSMA) in each channel). The first base station 420 and / or the second base station 421 may configure the resources via PDCCH or RRC.

[0068] 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. The UE 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 UE 451 providing assistance can be referred to as a receiving UE or partner UE, which can potentially inform the transmitting UE 450. The transmitting UE 450 can send information to the receiving UE 451 via sidelink communication.

[0069] D2D communication (e.g., V2X communication and / or V2V communication) may be performed via one or more sidelink carriers 470, 480. The one or more sidelink carriers 470, 480 may include one or more channels such as, for example, 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).

[0070] 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 transmitting to 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 transmitting to the first UE 450 via the second sidelink carrier 480.

[0071] In some aspects, the UL carrier 440 and the first sidelink carrier 470 may be aggregated to increase bandwidth. In some aspects, the first sidelink carrier 470 and / or the second sidelink carrier 480 may share a first spectrum (with the first network 410) and / or share a second spectrum (with the second network 411). In some aspects, the sidelink carriers 470, 480 may operate in an unlicensed radio frequency spectrum / shared radio frequency spectrum.

[0072] In some aspects, the sidelink communication on the sidelink carrier may occur between the first UE 450 and the second UE 451. In one aspect, the first UE 45 may perform sidelink communication with one or more (e.g., multiple) devices, including sidelink communication with the second UE 451 via the first sidelink carrier 470. For example, the first UE 450 may send a broadcast transmission to multiple devices (e.g., the second and third UEs 451, 452) via the first sidelink carrier 470. The second UE 451 (e.g., in addition to other UEs) may receive such a broadcast transmission. In addition or alternatively, the first UE 450 may send a multicast transmission to multiple devices (e.g., the second and third UEs 451, 452) via the first sidelink carrier 470. The second UE 451 and / or the third UE 452 (e.g., in addition to other UEs) may receive such a multicast transmission. The multicast transmission may be connectionless or connection-oriented. The multicast transmission may also be referred to as a group broadcast transmission.

[0073] In addition, the first UE 450 can send a unicast transmission to a device (such as, the second UE 451) via the first sidelink carrier 470. The second UE 451 (e.g., in addition to other UEs) can receive such unicast transmissions. In addition or alternatively, the second UE 451 can perform sidelink communications with one or more (e.g., multiple) devices, including sidelink communications with the first UE 450 via the second sidelink carrier 480. For example, the second UE 451 can send a broadcast transmission to multiple devices via the second sidelink carrier 480. The first UE 450 (e.g., in addition to other UEs) can receive such broadcast transmissions.

[0074] In another example, the second UE 451 may send a multicast transmission to multiple devices (e.g., the first and third UEs 450, 452) via the second sidelink carrier 480. The first UE 450 and / or the third UE 452 (e.g., in addition to other UEs) may receive such multicast transmissions. In addition, the second UE 451 may send a unicast transmission to a device (such as the first UE 450) via the second sidelink carrier 480. The first UE 450 (e.g., in addition to other UEs) may receive such unicast transmissions. The third UE 452 may communicate in a similar manner.

[0075] In some aspects, for example, such sidelink communication on a sidelink carrier between a first UE 450 and a second UE 451 may occur without the 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 sidelink carriers 470, 480) and / or without scheduling such communication. Sidelink communication may include service 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 service communication (e.g., transmitting feedback information for previously received service communication). Sidelink communication may employ at least one sidelink communication structure having at least one feedback symbol. The feedback symbol of the sidelink communication structure may be allocated to any sidelink feedback information that may be transmitted in a device-to-device (D2D) communication system 400 between devices (e.g., a first UE 450, a second UE 451, and / or a third UE 452).

[0076] As discussed, the UE may be a vehicle (eg, UE 450, 451), a mobile device (eg, UE 452), or other type of device. In some cases, the UE may be a special UE, such as a roadside unit (RSU). Figure 5 An example of a V2X system 500 with an RSU 510 according to various aspects of the present disclosure is shown. Figure 5As shown, the transmitter UE 504 sends data to the RSU 510 and the companion UE 502 via a sidelink transmission 512. In addition or alternatively, the RSU 510 can send data to the transmitter UE 504 via the sidelink transmission 512. The RSU 510 can forward the data received from the transmitter UE 502 to the cellular network (e.g., gNB) 508 via an uplink (UL) transmission 514. The gNB 508 can send the data received from the RSU 510 to the other UEs 506 via a downlink (DL) transmission 516.

[0077] In some examples, RSU 510 can be integrated with traffic infrastructure, such as traffic lights, light poles, or other types of infrastructure. Figure 5 In the example of , the RSU 510 is a traffic light located on the side of the road 520. Additionally or alternatively, one or more of the RSUs 510 may be stand-alone units.

[0078] As discussed, a UE (such as a transmitting UE) may use sensing information provided by other UEs (e.g., one or more partner UEs (i.e., sensing UEs)) to identify communication resources for sidelink communication (e.g., sidelink transmission). In addition or alternatively, the transmitting UE may obtain sensing information obtained through its own measurements. Thus, in some cases, the transmitting UE may use sensing information obtained from its own measurements as well as sensing information provided by other UEs. It may be desirable to combine sensing information to reduce conflicts, such as conflicts caused by half-duplex and hidden node problems.

[0079] In order to reduce network activity and improve network throughput, when UEs coordinate sensing information, it may be desirable to specify conditions for sharing information (e.g., when the information can be shared). It may also be desirable to specify a duration for sharing. Various aspects of the present disclosure are intended to provide conditions for sharing sensing information and a duration for sharing the sensing information. The conditions discussed below may be implemented independently or in one or more different combinations.

[0080] In the present disclosure, a transmitting UE refers to a UE that sends information to a receiving UE via one or more sidelink transmissions. The transmitting UE uses the sensing information to identify transmission resources for the sidelink transmission. A partner UE can be another UE within range of the receiving UE and / or the transmitting UE.

[0081] The side chain UE can determine the available transmission resources from a transmission resource pool including a resource set allocated to the side chain operation. The transmission resource pool includes a subframe and a resource block within a subframe. The subframe bitmap can indicate whether the subframe is available for side chain transmission. The side chain resources of the subframe designated for side chain transmission can be grouped into two different frequency bands identified by the occupied physical resource blocks (PRBs). Therefore, multiple resource pools can be nested in a subframe. The remaining resource blocks of the subframe can be used by other UEs for cellular services. The resource pool can be a receiving resource pool or a transmitting resource pool. The configuration for specifying a resource pool for receiving or transmitting can be sent by a base station with a signal, or preconfigured for out-of-coverage operation. A connection failure with a base station is an example of out-of-coverage operation. In such an example, the partner UE operates based on one or more configurations specified for out-of-coverage operation.

[0082] In some cases, sensing information may be shared from a resource pool that is specifically configured for sharing. For example, a first resource pool may not be configured for sharing sensing information, and a second resource pool may be configured for sharing sensing information. In this example, the UE may sense resources from both the first pool and the second pool. However, in this example, the UE may only share sensing information from the second pool. The sharing configuration may be signaled from the base station or preconfigured for out-of-coverage operation.

[0083] As discussed, a transmitting UE may request sensing information from one or more partner UEs. In one configuration, the partner UE shares the sensing information in response to receiving a request from the transmitting UE. The request may be sent as part of an information element for a first level sidelink control information (SCI), a second level SCI, a MAC control element (CE), or an RRC signal. The SCI may be sent on a physical sidelink control channel (PSCCH) and may include information for a UE to receive and demodulate a physical sidelink shared channel (PSSCH). Thus, the SCI is sent prior to sending a sidelink traffic channel (STCH) data block.

[0084] In V2X communications, quality of service (QoS) control or congestion handling may be relatively passive. For example, QoS control may be based on a measured channel busy ratio (CBR) or on received V2X messages. CBR or channel busy time (CBT) may be the ratio between the time a channel is sensed to be busy and the total observation time (e.g., 100ms). That is, CBR may be a measure of the channel load perceived by a UE (such as a transmitter UE) and may depend on the number of other UEs within the transmission range of the transmitter UE and the message generation rate of each of these other UEs. In one configuration, when the transmitter UE selects resources for transmission (e.g., sidelink transmission), the transmission may be associated with a QoS requirement. In this configuration, the transmitter UE may determine a CBR for transmission from the transmitter UE. In addition, in this configuration, when the transmitter UE observes a packet transmission with a QoS level (such as CBR) greater than a threshold, the sensing information is shared. In addition or alternatively, when the QoS level (e.g., CBR) is higher than a configured threshold, the partner UE may share the sensing information. That is, when the channel is busy, the companion UEs may share sensing information to assist the transmitting UE in finding available resources.

[0085] A base station (e.g., gNB) may configure various aspects of a UE via RRC signaling, SIB signaling, and / or other types of signaling. In one configuration, a base station may designate one or more UEs to share sensing information. Sensing information may be shared when one or more of the above conditions are met. Other conditions for triggering sharing of sensing information may also be specified.

[0086] Additionally or alternatively, the UE may be configured to share the sensing information for a specific duration once the UE initiates the sharing process. In one configuration, the UE is configured with a sharing window. The sharing window may last for a fixed amount of time. When the UE starts sharing the sensing information, the UE shares the sensing information for the configured duration while performing other transmissions.

[0087] Figure 6 is a diagram of an example of a shared window according to aspects of the present disclosure. Figure 6 As shown, the sharing window may be configured within a certain duration (eg, milliseconds, time slots, etc.). The duration of the sharing window may be configured via signaling from the base station, and / or the duration of the sharing window may be preconfigured for out-of-range operation.

[0088] exist Figure 6In the example of , the partner UE periodically transmits sensing information 602A, 602B, 602C corresponding to resources allocated to one or more resource pools. When sharing the sensing information during the sharing window, the UE may perform other transmissions, such as uplink transmissions to the base station and / or other sidelink transmissions.

[0089] like Figure 6 As shown, the transmission of the first sensing information 602A, the second sensing information 602B, and the third sensing information 606C is initiated during the sharing window. In this example, the first sensing information 602A, the second sensing information 602B, and the third sensing information 602C can be shared with the transmitting UE because the transmission is initiated during the sharing window. Each transmission can be within a duration. In addition, Figure 6 In the example of , after the end of the sharing window, a process for sharing the fourth sensing information 602D is initiated. However, since the transmission of the fourth sensing information 602D occurs after the end of the sharing window, the fourth sensing information 602D is not shared. As described above, a sharing window can be specified to reduce network overhead and improve network throughput. The shared sensing information 602A, 602B, 602C can provide resource information for a future time window.

[0090] As discussed, the sensing information may be shared in response to a request received from a UE (e.g., a transmitting UE). In one configuration, the partner UE stops sharing the sensing information in response to receiving a stop request from the transmitting UE. In this configuration, the transmitting UE refers to the UE that receives the shared sensing information from the partner UE.

[0091] As indicated above, Figure 5-6 is provided as an example. Other examples may be Figure 5-6 The examples described are different.

[0092] Figure 7 7 is a block diagram 700 illustrating an example of a hardware implementation of an apparatus 702 employing a processing system 714. The processing system 712 may be implemented with a bus architecture generally represented by a bus 724. The bus 724 may include any number of interconnecting buses and bridges, depending on the specific application and overall design constraints of the processing system 714. The bus 724 couples together various circuits including one or more processors and / or hardware components (represented by the processor 704, shared components 716, and computer readable media / memory 706). The bus 724 may also couple together 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.

[0093] The processing system 714 may be coupled to the transceiver 710. The transceiver 710 is coupled to one or more antennas 720. The transceiver 730 provides a means for communicating with various other devices over a transmission medium. The transceiver 710 receives signals from the one or more antennas 720, extracts information from the received signals, and provides the extracted information to the processing system 714. In addition, the transceiver 710 receives information from the processing system 714 and, based on the received information, generates a signal to be applied to the one or more antennas 720. The transceiver 710 receives sensing information sent from one or more partner UEs. The sensing information may be sent via a sidelink transmission.

[0094] The processing system 714 includes a processor 704 coupled to a computer-readable medium / memory 706. The processor 704 is responsible for general processing, including executing software stored on the computer-readable medium or memory 706. When executed by the processor 704, the software causes the processing system 714 to perform the various functions described above for any particular device. The computer-readable medium / memory 706 may also be used to store data that is manipulated by the processor 704 when executing the software.

[0095] The processing system 714 also includes at least a sharing component 716. The sharing component 717, the transceiver 710, and / or the processor 704 can identify resource availability during a sensing window. The sharing component 716, the transceiver 710, and / or the processor 704 can receive a request to share resource information with another UE (e.g., a transmitting UE). The sharing component 716 and / or the processor 704 can also determine whether a sharing condition is met. The sharing component 716, the transceiver 710, and / or the processor 704 can share resource availability with other UEs based on meeting the sharing condition.

[0096] The component may be a software component resident / stored in the computer-readable medium / memory 706 running in the processor 704, one or more hardware components coupled to the processor 704, or some combination thereof. The processing system 714 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 370, and the controller / processor 375. Alternatively, the processing system 714 may be the entire base station (e.g., see Figure 3 The processing system 714 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 714 may be the entire UE (e.g., see Figure 3 UE350).

[0097] In one configuration, the apparatus 702 for wireless communication includes a unit for identifying resource availability during a sensing window, a unit for receiving a request for sharing resource information with a transmitting UE, a unit for determining that a sharing condition is satisfied, and a unit for sharing resource availability with the transmitting UE based on satisfying the sharing condition. The aforementioned unit may be one or more of the aforementioned components of the processing system 714, which are configured to perform the functions described by the aforementioned units. As described above, the processing system 714 may include a TX processor 316, an RX processor 370, and a controller / processor 375. Therefore, in one configuration, the aforementioned unit may be a TX processor 316, an RX processor 370, and a controller / processor 375 configured to perform the functions described by the aforementioned units. The aforementioned unit may be one or more of the aforementioned components of the processing system 714, which are configured to perform the functions described by the aforementioned apparatus. As described above, the processing system 714 may include a TX processor 368, an RX processor 356, and a controller / processor 359. Therefore, in one configuration, the aforementioned unit may be a TX processor 358, an RX processor 356, and a controller / processor 35 configured to perform the functions described by the aforementioned units.

[0098] Figure 8 8 is a flow chart 800 illustrating a method of wireless communication, for example, performed by a user equipment (UE) according to various aspects of the present disclosure. The UE may be an example of a sensing UE. Figure 8 As shown, at block 802, the UE identifies resource availability during a sensing window. For example, the UE (e.g., using antenna 352, RX 354, RX processor 356, TX 354, TX processor 368, controller / processor 359, etc.) may identify resource availability.

[0099] At block 804, the UE receives a request to share resource information with a transmitting UE.For example, a UE (eg, using antenna 352, RX 354, RX processor 356, controller / processor 359, etc.) may receive a request to share resource information.

[0100] At block 806, the UE determines that the sharing conditions are met. For example, the UE (eg, using the RX processor 356, the TX processor 368, the controller / processor 359, etc.) may determine that one or more sharing conditions are met.

[0101] At block 808, the UE shares resource availability with the transmitting UE based on satisfying the sharing condition.For example, the UE (eg, using antenna 352, TX 354, TX processor 368, controller / processor 359, etc.) may share resource availability.

[0102] The following numbered clauses describe implementation details:

[0103] 1. A method of wireless communication performed by a sensing user equipment (UE), comprising:

[0104] identifying resource availability during a sensing window;

[0105] receiving a request to share resource information with a transmitting UE;

[0106] Determining that the conditions for sharing are met; and

[0107] Based on satisfying the sharing condition, the resource availability is shared with the transmitting UE.

[0108] 2. The method according to clause 1, further comprising:

[0109] identifying the resource availability from a resource pool configured for resource sharing; and

[0110] The sharing condition is determined to be satisfied based on the resource pool configured for resource sharing.

[0111] 3. A method as described in any of clauses 1-2, further comprising determining that the sharing condition is met based on receiving the request for sharing from the transmitting UE.

[0112] 4. A method as described in clause 3, wherein the request is received via a sidelink control information (SCI), a medium access control (MAC) control element (CE) or a radio resource control (RRC) signal.

[0113] 5. The method according to any one of clauses 1 to 5, further comprising:

[0114] receiving a stop request from the transmitting UE; and

[0115] The resource availability sharing is stopped based on receiving the stop request.

[0116] 6. A method as described in any of clauses 1-5, further comprising determining that the sharing condition is satisfied based on transmissions from one or both of the sensing UE or the transmitting UE satisfying a quality of service level.

[0117] 7. A method according to any one of clauses 1 to 6, further comprising:

[0118] determining that a channel busy ratio (CBR) is greater than a CBR threshold; and

[0119] The sharing condition is determined to be satisfied based on the CBR being greater than the CBR threshold.

[0120] 8. A method according to any one of clauses 1 to 7, further comprising:

[0121] receiving a message from a base station allowing the sensing UE to share the resource information; and

[0122] It is determined based on the message that the sharing condition is satisfied.

[0123] 9. A method according to any one of clauses 1 to 8, further comprising:

[0124] configuring a shared time window for a predetermined duration; and

[0125] The resource availability sharing is stopped based on expiration of a predetermined duration.

[0126] The foregoing 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 are possible in light of the above disclosure or may be acquired from practice of the various aspects.

[0127] 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 using hardware, firmware, and / or a combination of hardware and software.

[0128] Some aspects are described herein with respect to thresholds. As used herein, satisfying a threshold may refer to a value being 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.

[0129] It will be apparent that the systems and / or methods described herein and in Appendix A may be implemented using various forms of hardware, firmware, and / or combinations of hardware and software. The actual specialized control hardware or software code used to implement these systems and / or methods is not limiting in any respect. Thus, the operation and behavior of the systems and / or methods are described herein without reference to specific software code, with the understanding that software and hardware may be designed to implement the systems and / or methods based, at least in part, on the description herein.

[0130] Even if the specific combination of features is recorded in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. In fact, many of these features can be combined in a manner that is not specifically recorded in the claims and / or specifically disclosed in the specification. Although each dependent claim listed below can only directly depend on one claim, the disclosure of various aspects includes the combination of each dependent claim with each other claim in the claim set. The phrase "at least one of" referring to the list of items refers to any combination of those items, including a single member. For example, "at least one of a, b or c" is intended to cover a, b, c, ab, ac, bc and abc, and any combination with multiples of the same element (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc and ccc or any other ordering of a, b and c).

[0131] None of the elements, actions or instructions used herein should be interpreted as key or necessary, unless explicitly described as such. In addition, as used herein, the articles "a" and "an" are intended to include one or more projects, 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 projects (e.g., related projects, unrelated projects, combinations of related projects and unrelated projects, etc.), and can be used interchangeably with "one or more". In the case of only expecting a project, the phrase "only one" or similar language is used. In addition, as used herein, the terms "has", "have", "having" and / or similar terms are intended to be open terms. In addition, unless otherwise explicitly stated, the phrase "based on" is intended to mean "based at least in part on".

Claims

1. A method of wireless communication performed by a sensing user equipment (UE), comprising: identifying resource availability during a sensing window; receiving a request to share resource information with a transmitting UE; Determining that a channel busy ratio (CBR) is greater than a CBR threshold; Determining that a sharing condition is satisfied based on that the CBR is greater than the CBR threshold; as well as Based on determining that the sharing condition is satisfied, the resource availability is shared with the transmitting UE.

2. The method according to claim 1, further comprising: identifying the resource availability from a resource pool configured for resource sharing; as well as The sharing condition is determined to be satisfied based on that the resource pool is configured for resource sharing.

3. The method according to claim 1, further comprising: The sharing condition is determined to be satisfied based on receiving the request for sharing from the transmitting UE.

4. The method according to claim 3, wherein: The request is received via a sidelink control information (SCI), a medium access control (MAC) control element (CE), or a radio resource control (RRC) signal.

5. The method according to claim 1, further comprising: receiving a stop request from the transmitting UE; as well as Sharing of the resource availability is stopped based on receiving the stop request.

6. The method according to claim 1, further comprising: Satisfying the sharing condition is determined based on transmissions from one or both of the sensing UE or the transmitting UE satisfying a quality of service level.

7. The method according to claim 1, further comprising: receiving a message from a base station allowing the sensing UE to share the resource information; as well as A determination is made based on the message that the sharing condition is satisfied.

8. The method according to claim 1, further comprising: Configure shared time windows for predetermined durations; as well as Sharing of the resource availability is stopped based on expiration of the predetermined duration.

9. An apparatus for wireless communication at a sensing user equipment (UE), comprising: means for identifying resource availability during a sensing window; means for receiving a request to share resource information with a transmitting UE; means for determining that a channel busy ratio (CBR) is greater than a CBR threshold; A unit for determining that a sharing condition is satisfied based on that the CBR is greater than the CBR threshold; as well as means for sharing the resource availability with the transmitting UE based on determining that the sharing condition is satisfied.

10. The apparatus according to claim 9, further comprising: means for identifying availability of said resource from a resource pool configured for resource sharing; as well as The device is configured to determine that the sharing condition is satisfied based on that the resource pool is configured for resource sharing.

11. The apparatus according to claim 9, further comprising: Means for determining that the sharing condition is satisfied based on receiving the request for sharing from the transmitting UE.

12. The device according to claim 11, wherein: The request is received via a sidelink control information (SCI), a medium access control (MAC) control element (CE), or a radio resource control (RRC) signal.

13. The apparatus according to claim 9, further comprising: means for receiving a stop request from the transmitting UE, wherein the means for sharing stops sharing of the resource availability based on receiving the stop request.

14. The apparatus according to claim 9, further comprising: Means for determining that the sharing condition is satisfied based on transmissions from one or both of the sensing UE or the transmitting UE satisfying a quality of service level.

15. The apparatus according to claim 9, further comprising: means for receiving a message from a base station allowing the sensing UE to share the resource information; as well as The method further comprises: determining means for satisfying the sharing condition based on the message.

16. The device according to claim 9, wherein: The resource availability is shared via the means for sharing during a sharing time window associated with a predetermined time duration.

17. An apparatus for wireless communication at a sensing user equipment (UE), comprising: processor; a memory coupled to the processor; as well as Instructions stored in the memory and operable when executed by the processor to cause the apparatus to: identifying resource availability during a sensing window; receiving a request to share resource information with a transmitting UE; Determining that a channel busy ratio (CBR) is greater than a CBR threshold; Determining that a sharing condition is satisfied based on that the CBR is greater than the CBR threshold; as well as Based on determining that the sharing condition is satisfied, the resource availability is shared with the transmitting UE.

18. The device according to claim 17, wherein: The instructions also cause the device to perform the following operations: identifying the resource availability from a resource pool configured for resource sharing; and The sharing condition is determined to be satisfied based on that the resource pool is configured for resource sharing.

19. The device according to claim 17, wherein: The instructions also cause the device to perform the following operations: The sharing condition is determined to be satisfied based on receiving the request for sharing from the transmitting UE.

20. The device according to claim 19, wherein The request is received via a sidelink control information (SCI), a medium access control (MAC) control element (CE), or a radio resource control (RRC) signal.

21. The device according to claim 17, wherein: The instructions also cause the device to perform the following operations: receiving a stop request from the transmitting UE; and Sharing of the resource availability is stopped based on receiving the stop request.

22. The device according to claim 17, wherein: The instructions also cause the apparatus to determine that the sharing condition is satisfied based on transmissions from one or both of the sensing UE or the transmitting UE satisfying a quality of service level.

23. The device according to claim 17, wherein: The instructions also cause the device to perform the following operations: receiving a message from a base station allowing the sensing UE to share the resource information; and A determination is made based on the message that the sharing condition is satisfied.

24. The device according to claim 17, wherein: The instructions also cause the device to perform the following operations: configuring a shared time window for a predetermined duration; and Sharing of the resource availability is stopped based on expiration of the predetermined duration.

25. A non-transitory computer readable medium having recorded thereon program code for wireless communication at a sensing user equipment (UE), the program code being executed by a processor to: identifying resource availability during a sensing window; receiving a request to share resource information with a transmitting UE; Determining that a channel busy ratio (CBR) is greater than a CBR threshold; Determining that a sharing condition is satisfied based on that the CBR is greater than the CBR threshold; as well as Based on determining that the sharing condition is satisfied, the resource availability is shared with the transmitting UE.

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