Resource sharing between the base station and anchor user equipment on the sidelink channel

Abstract

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a first user equipment (UE) may receive a configuration message from a base station, wherein the configuration message indicates a first set of resources reserved for the base station and a second set of resources reserved for the first UE; and communicate with at least one second UE on a sidelink channel using the second set of resources. Many other aspects are provided.

Description

Technical Field

[0001] Aspects of the present disclosure relate generally to wireless communications, and to techniques and apparatus for resource sharing between a base station and an anchor user equipment (UE) on a sidelink channel. Background Art

[0002] 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 can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and long term evolution (LTE). LTE / LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP).

[0003] A wireless network may include multiple base stations (BS) that can support communications for multiple user equipment (UE). A user equipment (UE) may communicate with a base station (BS) via a downlink and an uplink. A downlink (or forward link) refers to a communication link from a BS to a UE, and an uplink (or reverse link) refers to a communication link from a UE to a BS. As will be described in more detail herein, a BS may be referred to as a Node B, gNB, access point (AP), radio head, transmit receive point (TRP), new radio (NR) BS, 5G Node B, etc.

[0004] The above-mentioned multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different user devices to communicate at the city, country, region and even global level. New Radio (NR), also known as 5G, is a set of enhancements to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP). NR aims to better support mobile broadband Internet access by improving spectrum efficiency, reducing costs, improving services, utilizing new spectrum, and better integrating with other open standards, which use orthogonal frequency division multiplexing (OFDM) with cyclic prefix (CP) (CP-OFDM) on the downlink (DL), CP-OFDM and / or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UL), and support beamforming, multiple-input multiple-output (MIMO) antenna technology and carrier aggregation. As the demand for mobile broadband access continues to grow, further improvements in LTE, NR and other wireless access technologies remain very useful. Summary of the invention

[0005] In some aspects, a method of wireless communication performed by a first user equipment (UE) may include: receiving a configuration message from a base station, wherein the configuration message indicates a first set of resources reserved for the base station and a second set of resources reserved for the first UE; and communicating with at least one second UE on a sidelink channel using the second set of resources.

[0006] In some aspects, a wireless communication method performed by a base station may include: sending a configuration message to a first UE, wherein the configuration message indicates a first set of resources reserved for the base station and a second set of resources reserved for the first UE; and communicating with at least one second UE using the first set of resources.

[0007] In some aspects, a wireless communication method performed by a first UE may include: sending a control channel message to a base station, wherein the control channel message indicates that a set of resources will be used by the first UE; and communicating with at least one second UE on a sidelink channel using the set of resources.

[0008] In some aspects, a method of wireless communication performed by a base station may include receiving a control channel message from a first UE, wherein the control channel message indicates that a set of resources is not to be used by the first UE; and communicating with at least one second UE using the set of resources.

[0009] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. When executed by one or more processors of a first UE, the one or more instructions may cause the one or more processors to receive a configuration message from a base station, wherein the configuration message indicates a first set of resources reserved for the base station and a second set of resources reserved for the first UE; and communicate with at least one second UE on a sidelink channel using the second set of resources.

[0010] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. When executed by one or more processors of a base station, the one or more instructions may cause the one or more processors to send a configuration message to a first UE, wherein the configuration message indicates a first set of resources reserved for the base station and a second set of resources reserved for the first UE; and communicate with at least one second UE using the first set of resources.

[0011] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. When executed by one or more processors of a first UE, the one or more instructions may cause the one or more processors to send a control channel message to a base station, wherein the control channel message indicates a set of resources to be used by the first UE; and communicate with at least one second UE on a sidelink channel using the set of resources.

[0012] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. When executed by one or more processors of a base station, the one or more instructions may cause the one or more processors to receive a control channel message from a first UE, wherein the control channel message indicates that a group of resources will not be used by the first UE; and communicate with at least one second UE using the group of resources.

[0013] In some aspects, a first UE for wireless communication may include a memory and one or more processors operably coupled to the memory. The memory and the one or more processors may be configured to receive a configuration message from a base station, wherein the configuration message indicates a first set of resources reserved for the base station and a second set of resources reserved for the first UE; and communicate with at least one second UE on a sidelink channel using the second set of resources.

[0014] In some aspects, a base station for wireless communication may include a memory and one or more processors operably coupled to the memory. The memory and the one or more processors may be configured to send a configuration message to a first UE, wherein the configuration message indicates a first set of resources reserved for the base station and a second set of resources reserved for the first UE; and communicate with at least one second UE using the first set of resources.

[0015] In some aspects, a first UE for wireless communication may include a memory and one or more processors operably coupled to the memory. The memory and the one or more processors may be configured to send a control channel message to a base station, wherein the control channel message indicates a set of resources to be used by the first UE; and communicate with at least one second UE on a sidelink channel using the set of resources.

[0016] In some aspects, a base station for wireless communication may include a memory and one or more processors operably coupled to the memory. The memory and the one or more processors may be configured to receive a control channel message from a first UE, wherein the control channel message indicates that a set of resources will not be used by the first UE; and communicate with at least one second UE using the set of resources.

[0017] In some aspects, an apparatus for wireless communication may include: a module for receiving a configuration message from a base station, wherein the configuration message indicates a first set of resources reserved for the base station and a second set of resources reserved for the apparatus; and a module for communicating with at least one UE on a sidelink channel using the second set of resources.

[0018] In some aspects, an apparatus for wireless communication may include: a module for sending a configuration message to a first UE, wherein the configuration message indicates a first set of resources reserved for the apparatus and a second set of resources reserved for the first UE; and a module for communicating with at least one second UE using the first set of resources.

[0019] In some aspects, an apparatus for wireless communication may include: a module for sending a control channel message to a base station, wherein the control channel message indicates a set of resources to be used by the apparatus; and a module for communicating with at least one UE on a sidelink channel using the set of resources.

[0020] In some aspects, an apparatus for wireless communication may include: means for receiving a control channel message from a first UE, wherein the control channel message indicates that a set of resources will not be used by the first UE; and means for communicating with at least one second UE using the set of resources.

[0021] The aspects generally include methods, apparatuses, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and / or processing systems as substantially described herein with reference to and illustrated by the drawings and description.

[0022] The features and technical advantages of the examples according to the present disclosure have been outlined quite broadly above 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 a basis for modifying or designing other structures for achieving the same purpose 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 methods of operation, and related advantages will be better understood from the following description when considered in conjunction with the accompanying drawings. Each of the accompanying drawings is provided for the purpose of illustration and description and not as a definition of limitations to the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to be able to understand the above-mentioned features of the present disclosure in detail, a more specific description of the above brief summary may be made with reference to some aspects, some of which are shown in the accompanying drawings. However, it should be noted that the accompanying drawings only show certain typical aspects of the present disclosure and should not 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 represent the same or similar elements.

[0024] Figure 1 is a diagram illustrating an example of a wireless network in accordance with various aspects of the present disclosure.

[0025] Figure 2 is a diagram illustrating an example of a base station communicating with a UE in a wireless network according to various aspects of the present disclosure.

[0026] Figure 3 is a diagram illustrating an example of sidelink communications according to various aspects of the present disclosure.

[0027] Figure 4 is a diagram illustrating examples of side link communications and access link communications according to various aspects of the present disclosure.

[0028] Figure 5 is a diagram illustrating an example of anchor-based sidelink communications in accordance with various aspects of the present disclosure.

[0029] Fig. 6A is a diagram illustrating an example of resource allocation for sidelink communications according to various aspects of the present disclosure.

[0030] Figure 6B and 6C is a diagram illustrating an example of a time slot structure for sidelink communications according to various aspects of the present disclosure.

[0031] Fig. 7A and 7B is a diagram illustrating an example associated with signal-based resource sharing between an anchor UE and a base station according to various aspects of the present disclosure.

[0032] Figure 8 is a diagram illustrating another example of signal-based resource sharing between an anchor UE and a base station according to various aspects of the present disclosure.

[0033] Fig. 9 is a diagram illustrating an example of time slot allocation between an anchor UE and a base station according to various aspects of the present disclosure.

[0034] Fig.10 is a diagram illustrating examples of starting points within time slots of an anchor UE and a base station according to various aspects of the present disclosure.

[0035] Fig.11 is a diagram illustrating an example of contention-based resource sharing between an anchor UE and a base station according to various aspects of the present disclosure.

[0036] Fig.12 is a diagram illustrating example processes performed by a UE according to various aspects of the present disclosure.

[0037] Fig.13 is a diagram illustrating example processes performed by a base station according to various aspects of the present disclosure.

[0038] Fig.14 is a diagram illustrating another example process performed by a UE according to various aspects of the present disclosure.

[0039] Fig.15 is a diagram illustrating another example process performed by a base station according to various aspects of the present disclosure. DETAILED DESCRIPTION

[0040] The various aspects of the present disclosure will be described more fully below with reference to the accompanying drawings. However, the present disclosure can be implemented in many different forms and should not be interpreted 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 thorough and complete, and to fully convey the scope of the present disclosure 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 disclosed herein, whether implemented independently of any other aspect of the present disclosure or implemented in combination with any other aspect of the present disclosure. For example, any number of aspects set forth herein can be used to implement a device or practice method. In addition, the scope of the present disclosure is intended to cover such a device or method, which is practiced using other structures, functions, or structures and functions in addition to or different from the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein can be embodied by one or more elements of the claims.

[0041] Several aspects of telecommunication systems will now be described 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 may be implemented using hardware, software, or a combination thereof. Whether these elements are implemented as hardware or software depends on the specific application and design constraints on the overall system.

[0042] It should be noted that although terms generally associated with 5G or NR radio access technologies (RATs) may be used herein to describe various aspects, various aspects of the present disclosure may be applied to other RATs, such as 3G RATs, 4G RATs, and / or RATs beyond 5G (e.g., 6G).

[0043] Figure 1 is a diagram showing an example of a wireless network 100 according to various aspects of the present disclosure. The wireless network 100 may be or may include elements of a 5G (NR) network, an LTE network, etc. The wireless network 100 may include a plurality of base stations 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A base station (BS) is an entity that communicates with a user equipment (UE) and may also be referred to as an NR BS, Node B, gNB, 5G Node B (NB), access point, transmit receive point (TRP), etc. Each BS may provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to a coverage area of ​​a BS and / or a BS subsystem serving the coverage area, depending on the context in which the term is used.

[0044] A BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and / or another type of cell. A macro cell may cover a relatively large geographic area (e.g., a radius of several kilometers) and may allow unrestricted access to UEs with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access to UEs with service subscriptions. A femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access to UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG)). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS. In Figure 1 In the example shown, BS 110a may be a macro BS of macro cell 102a, BS 110b may be a pico BS of pico cell 102b, and BS 110c may be a femto BS of femto cell 102c. A BS may support one or more (e.g., three) cells. The terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "Node B", "5G NB", and "cell" may be used interchangeably herein.

[0045] In some aspects, the cells are not necessarily stationary, and the geographic area of ​​the cells may move depending on the location of the mobile BS. In some aspects, the BSs may be interconnected with each other and / or with one or more other BSs or network nodes (not shown) in the wireless network 100 through various types of backhaul interfaces, such as direct physical connections, virtual networks, etc., using any suitable transmission network.

[0046] The wireless network 100 may also include a relay station. A relay station is an entity that can receive data transmissions from an upstream station (e.g., a BS or a UE) and send data transmissions to a downstream station (e.g., a UE or a BS). A relay station may also be a UE that can relay transmissions for other UEs. Figure 1 In the example shown, a relay station 110d may communicate with the macro BS 110a and the UE 120d to facilitate communication between the BS 110a and the UE 120d. A relay station may also be referred to as a relay BS, a relay base station, a relay, or the like.

[0047] The wireless network 100 may be a heterogeneous network including different types of BSs, such as a macro BS, a pico BS, a femto BS, a relay BS, etc. These different types of BSs may have different transmit power levels, different coverage areas, and different effects on interference in the wireless network 100. For example, a macro BS may have a high transmit power level (e.g., 5 to 40 watts), while a pico BS, a femto BS, and a relay BS may have a lower transmit power level (e.g., 0.1 to 2 watts).

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

[0049] UE 120 (e.g., 120a, 120b, 120c) can be dispersed in the wireless network 100, and each UE can be fixed or mobile. UE can also be referred to as an access terminal, terminal, mobile station, subscriber unit, station, etc. UE can be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet computer, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, a biosensor / device, a wearable device (smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), an entertainment device (e.g., a music or video device, or a satellite radio), a vehicle component or sensor, a smart meter / sensor, an industrial manufacturing device, a global positioning system device, or any other suitable device configured to communicate via a wireless or wired medium.

[0050] Some UEs may be considered as machine type communication (MTC) or evolved or enhanced machine type communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., which may communicate with a base station, another device (e.g., a remote device), or some other entity. For example, a wireless node may provide a connection to or to a network (e.g., a wide area network such as the Internet or a cellular network) via a wired or wireless communication link. Some UEs may be considered as Internet of Things (IoT) devices, and / or may be implemented as NB-IoT (narrowband Internet of Things) devices. Some UEs may be considered as client equipment (CPE). UE 120 may be included in a housing that houses components of UE 120 (such as a processor component, a memory component, etc.). In some aspects, the processor component and the memory component may be coupled together. For example, a processor component (e.g., one or more processors) and a memory component (e.g., a memory) may be operably coupled, communicatively coupled, electronically coupled, electrically coupled, etc.

[0051] Generally, any number of wireless networks can be deployed in a given geographic area. Each wireless network can support a specific RAT and can operate on one or more frequencies. RAT can also be referred to as radio technology, air interface, etc. Frequency can also be referred to as carrier, channel, etc. Each frequency can support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0052] In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly (e.g., without using base station 110 as an intermediary for communicating with each other) using one or more sidelink channels. For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, etc.), mesh networks, etc. In such cases, UE 120 may perform scheduling operations, resource selection operations, and / or other operations performed by base station 110 as described elsewhere herein.

[0053] As mentioned above, Figure 1 are provided as examples. Other examples may vary from Figure 1 As described.

[0054] Figure 22 is a diagram illustrating an example 200 of a base station 110 communicating with a UE 120 in a wireless network 100 in accordance with various aspects of the present disclosure. The base station 110 may be equipped with T antennas 234a through 234t and the UE 120 may be equipped with R antennas 252a through 252r, where in general T≥1 and R≥1.

[0055] At the base station 110, the transmit processor 220 may receive data for one or more UEs from the data source 212, select one or more modulation and coding schemes (MCS) for each UE based at least in part on a channel quality indicator (CQI) received from the UE, process (e.g., encode and modulate) the data for the UE based at least in part on the MCS selected for each UE, and provide data symbols for all UEs. The transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI), etc.) and control information (e.g., CQI requests, grants, upper layer signaling, etc.), and provide overhead symbols and control symbols. The transmit processor 220 may also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS), demodulation reference signals (DMRS), etc.) and synchronization signals (e.g., primary synchronization signals (PSS) and secondary synchronization signals (SSS)). A transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols (if applicable), and may provide T output symbol streams to T modulators (MOD) 232a to 232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a to 232t may be transmitted via T antennas 234a to 234t, respectively.

[0056] At UE 120, antennas 252a to 252r may receive downlink signals from base station 110 and / or other base stations, and may provide received signals to demodulators (DEMODs) 254a to 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. A MIMO detector 256 may obtain received symbols from all R demodulators 254a to 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols. A receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to a data sink 260, and provide decoded control information and system information to a controller / processor 280. The channel processor may determine reference signal received power (RSRP), received signal strength indicator (RSSI), reference signal received quality (RSRQ), channel quality indicator (CQI), etc. In some aspects, one or more components of the UE 120 may be included in the housing 284.

[0057] The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292. The network controller 130 may include, for example, one or more devices in a core network. The network controller 130 may communicate with the base station 110 via the communication unit 294.

[0058] On the uplink, at the UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information from a controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, CQI, etc.). The transmit processor 264 may also generate reference symbols for one or more reference signals. If applicable, the symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, etc.), and transmitted to the base station 110. In some aspects, the UE 120 includes a transceiver. The transceiver may include any combination of antennas 252, modulators and / or demodulators 254, a MIMO detector 256, a receive processor 258, a transmit processor 264, and / or a TX MIMO processor 266. The processor (e.g., the controller / processor 280) and the memory 282 may use the transceiver to perform aspects of any of the methods described herein, for example, as described with reference to Figure 7A-15 As described.

[0059] At the base station 110, uplink signals from the UE 120 and other UEs may be received by the antenna 234, processed by the demodulator 232, detected by the MIMO detector 236 (if applicable), and further processed by the receive processor 238 to obtain decoded data and control information sent by the UE 120. The receive processor 238 may provide the decoded data to the data sink 239 and the decoded control information to the controller / processor 240. The base station 110 may include a communication unit 244 and communicate with the network controller 130 via the communication unit 244. The base station 110 may include a scheduler 246 for scheduling the UE 120 for downlink and / or uplink communications. In some aspects, the base station 110 includes a transceiver. The transceiver may include any combination of the antenna 234, the modulator and / or demodulator 232, the MIMO detector 236, the receive processor 238, the transmit processor 220, and / or the TX MIMO processor 230. A processor (eg, controller / processor 240) and memory 242 may use a transceiver to perform aspects of any of the methods described herein, for example, as described with reference to Figure 7A-15 As described.

[0060] The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other components of the base station 110 may perform one or more techniques associated with resource sharing between the base station and the anchor UE on the sidelink channel, as described in more detail elsewhere herein. For example, the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component of the can perform or direct e.g. Fig.12 The process 1200 Fig.13 The process of 1300 Fig.14 The process of 1400 Fig.15 1500 and / or other processes described herein. Memories 242 and 282 may store data and program codes for base station 110 and UE 120, respectively. In some aspects, memory 242 and / or memory 282 may include a non-transitory computer-readable medium storing one or more instructions (e.g., code, program code, etc.) for wireless communication. For example, one or more instructions, when executed (e.g., directly or after compilation, conversion, interpretation, etc.) by one or more processors of base station 110 and / or UE 120, may cause one or more processors, UE 120, and / or base station 110 to perform or direct, for example, Fig.12 The process 1200 Fig.13 The process of 1300 Fig.14 The process of 1400 Fig.15In some aspects of process 1500, executing instructions may include running instructions, converting instructions, compiling instructions, interpreting instructions, etc.

[0061] In some aspects, a first UE (e.g., UE 120) may include means for receiving a configuration message from a base station, wherein the configuration message indicates a first set of resources reserved for the base station and a second set of resources reserved for the first UE; means for communicating with at least one second UE on a sidelink channel using the second set of resources, and so on. In some aspects, these means may include combining Figure 2 One or more components of the UE 120 are depicted, such as a controller / processor 280, a transmit processor 264, a TX MIMO processor 266, a MOD 254, an antenna 252, a DEMOD 254, a MIMO detector 256, a receive processor 258, and the like.

[0062] Additionally or alternatively, the first UE (e.g., UE 120) may include means for sending a control channel message to a base station, wherein the control channel message indicates a set of resources to be used by the first UE; means for communicating with at least one second UE on a sidelink channel using the set of resources, and so on. In some aspects, these means may include combining Figure 2 One or more components of UE 120 are depicted, such as controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, etc.

[0063] In some aspects, a base station (e.g., base station 110) may include means for sending a configuration message to a first UE, wherein the configuration message indicates a first set of resources reserved for the base station and a second set of resources reserved for the first UE; means for communicating with at least one second UE using the first set of resources, etc. In some aspects, these means may include in conjunction with Figure 2 One or more components of the base station 110 are depicted, such as an antenna 234, a demodulator 232, a MIMO detector 236, a receive processor 238, a controller / processor 240, a transmit processor 220, a TX MIMO processor 230, a MOD 232, an antenna 234, and the like.

[0064] Additionally or alternatively, a base station (e.g., base station 110) may include means for receiving a control channel message from a first UE, wherein the control channel message indicates that a set of resources will not be used by the first UE; means for communicating with at least one second UE using the set of resources, etc. In some aspects, these means may include in conjunction with Figure 2One or more components of the base station 110 are depicted, such as an antenna 234, a demodulator 232, a MIMO detector 236, a receive processor 238, a controller / processor 240, a transmit processor 220, a TX MIMO processor 230, a MOD 232, an antenna 234, and the like.

[0065] Although Figure 2 The blocks in the 2000 are shown as different components, but the functions described above for the blocks may be implemented in a single hardware, software, or combined component, or in various combinations of components. For example, the functions described for the transmit processor 264, the receive processor 258, and / or the TX MIMO processor 266 may be performed by the processor 280 or under the control of the processor 280.

[0066] As mentioned above, Figure 2 are provided as examples. Other examples may vary from Figure 2 As described.

[0067] Figure 3 is a schematic diagram illustrating an example 300 of sidelink communications in accordance with various aspects of the present disclosure.

[0068] like Figure 3 As shown, the first UE 305-1 can communicate with the second UE 305-2 (and one or more other UEs 305) via one or more side link channels 310. UE 305-1 and 305-2 can use one or more side link channels 310 for P2P communication, D2D communication, V2X communication (e.g., can include V2V communication, V2I communication, V2P communication, etc.), mesh network, etc. to communicate. In some aspects, UE 305 (e.g., UE 305-1 and / or UE 305-2) can correspond to one or more other UEs described elsewhere herein, such as UE 120. In some aspects, one or more side link channels 310 can use a PC5 interface and / or can operate in a high frequency band (e.g., a 5.9 GHz band). Additionally or alternatively, UE 305 can use global navigation satellite system (GNSS) timing to synchronize the timing of a transmit time interval (TTI) (e.g., a frame, a subframe, a time slot, a symbol, etc.).

[0069] like Figure 3As further shown, the one or more sidelink channels 310 may include a physical sidelink control channel (PSCCH) 315, a physical sidelink shared channel (PSSCH) 320, and / or a physical sidelink feedback channel (PSFCH) 325. The PSCCH 315 may be used to transmit control information, similar to a physical downlink control channel (PDCCH) and / or a physical uplink control channel (PUCCH) used for cellular communication with the base station 110 via an access link or access channel. The PSSCH 320 may be used to transmit data, similar to a physical downlink shared channel (PDSCH) and / or a physical uplink shared channel (PUSCH) used for cellular communication with the base station 110 via an access link or access channel. For example, the PSCCH 315 may carry sidelink control information (SCI) 330, which may indicate various control information for sidelink communication, such as one or more resources (e.g., time resources, frequency resources, space resources, etc.), where a transport block (TB) 335 may be carried on the PSSCH 320. The TB 335 may include data. The PSFCH 325 may be used to transmit sidelink feedback 340 , such as hybrid autonomous repeat request (HARQ) feedback (eg, acknowledgement or negative acknowledgement (ACK / NACK) information), transmit power control (TPC), scheduling request (SR), and the like.

[0070] In some aspects, one or more sidelink channels 310 may use a resource pool. For example, a scheduling assignment (e.g., included in SCI 330) may be sent in a subchannel across time using specific resource blocks (RBs). In some aspects, data transmissions associated with a scheduling assignment (e.g., on PSSCH 320) may occupy adjacent RBs in the same subframe as the scheduling assignment (e.g., using frequency division multiplexing). In some aspects, the scheduling assignment and the associated data transmission are not sent on adjacent RBs.

[0071] In some aspects, the UE 305 may operate using a transmission mode in which resource selection and / or scheduling is performed by the UE 305 (e.g., rather than the base station 110). In some aspects, the UE 305 may perform resource selection and / or scheduling by sensing channel availability for transmission. For example, the UE 305 may measure received signal strength indicator (RSSI) parameters associated with various side link channels (e.g., side link-RSSI (S-RSSI) parameters), may measure reference signal received power (RSRP) parameters associated with various side link channels (e.g., PSSCH-RSRP parameters), may measure reference signal received quality (RSRQ) parameters associated with various side link channels (e.g., PSSCH-RSRQ parameters), etc., and may select a channel for transmission of side link communications based at least in part on the measurements.

[0072] Additionally or alternatively, the UE 305 may perform resource selection and / or scheduling using the SCI 330 received in the PSCCH 315, which may indicate occupied resources, channel parameters, etc. Additionally or alternatively, the UE 305 may perform resource selection and / or scheduling by determining channel occupancy rates (CBRs) associated with various sidelink channels, which may be used for rate control (e.g., by indicating a maximum number of resource blocks that the UE 305 may use for a particular set of subframes).

[0073] In a transmission mode in which resource selection and / or scheduling is performed by the UE 305, the UE 305 may generate sidelink grants and may transmit these grants in the SCI 330. For example, the sidelink grant may indicate one or more parameters (e.g., transmission parameters) to be used for an upcoming sidelink transmission, such as one or more resource blocks (e.g., for TB 335) to be used for an upcoming sidelink transmission on the PSSCH 320, one or more subframes to be used for an upcoming sidelink transmission, a modulation and coding scheme (MCS) to be used for an upcoming sidelink transmission, etc. In some aspects, the UE 305 may generate a sidelink grant indicating one or more parameters of a semi-persistent scheduling (SPS), such as a periodicity of the sidelink transmission. Additionally or alternatively, the UE 305 may generate a sidelink grant for event-driven scheduling (e.g., for an on-demand sidelink message).

[0074] As mentioned above, Figure 3 are provided as examples. Other examples may differ from the reference Figure 3 As described.

[0075] Figure 4 is a diagram illustrating an example 400 of side link communications and access link communications in accordance with various aspects of the present disclosure.

[0076] like Figure 4 As shown, the transmitter (Tx) UE 405 and the receiver (Rx) UE 410 can communicate with each other via a side link, as described above in conjunction with Figure 3 As further shown, in some sidelink modes, the base station 110 can communicate with the Tx UE 405 via a first access link. Additionally or alternatively, in some sidelink modes, the base station 110 can communicate with the Rx UE 410 via a second access link. The Tx UE 405 and / or the Rx UE 410 can correspond to one or more UEs described elsewhere herein, such as Figure 1120. Therefore, the direct link between the UE 120 (e.g., via the PC5 interface) may be referred to as a side link, and the direct link between the base station 110 and the UE 120 (e.g., via the Uu interface) may be referred to as an access link. Side link communications may be sent via the side link, and access link communications may be sent via the access link. Access link communications may be downlink communications (from the base station 110 to the UE 120) or uplink communications (from the UE 120 to the base station 110).

[0077] As mentioned above, Figure 4 are provided as examples. Other examples may differ from the reference Figure 4 As described.

[0078] Figure 5 is a schematic diagram illustrating an example 500 of anchor-based sidelink communications according to various aspects of the present disclosure. Figure 5 As shown, a UE (e.g., UE 305-1) can act as an anchor on a sidelink channel with one or more other UEs (e.g., UE 305-2). Although described below in conjunction with an anchor UE 305-1 serving two client UEs 305-2, the description is equally applicable to an anchor UE 305-1 serving a single client UE, or to more than two client UEs, such as three, four, etc.

[0079] In some aspects, the base station 110 may allocate resources to the anchor UE 305-1 for sidelink communications with the client UE 305-2. The anchor UE 305-1 may handle scheduling of sidelink communications with the client UE 305-2 and allocate resources to the client UE 305-2 based at least in part on the resources allocated by the base station 110. Thus, the anchor UE 305-1 may act as a controller on a PC5 interface between the anchor UE 305-1 and the client UE 305-2, similar to how the base station 110 acts as a controller on a Uu interface between the base station 110 and the anchor UE 305-1.

[0080] In some aspects, the anchor UE 305-1 may use at least two communications to indicate to the client UE 305-2 the resources for sidelink communication (e.g., allocated by the base station 110 and / or autonomously or semi-autonomously selected by the anchor UE 305-1). For example, the anchor UE 305-1 may send first control information (e.g., first level sidelink control information (SCI-1), etc.) to the client UE 305-2. In some aspects, the anchor UE 305-1 may send the first control information on the PSCCH. The first control information may include resource allocation for the PSSCH, DMRS for the PSSCH, MCS for the PSSCH, etc.

[0081] In some aspects, the anchor UE 305-1 may also send second control information (e.g., second level sidelink control information (SCI-2), etc.) to the client UE 305-2. For example, the second control information may have a size indicated in the first control information and / or be sent on resources indicated in the first control information. In some aspects, as described above, the anchor UE 305-1 may send the second control information on the PSSCH established by the first control information. The second control information may include information for decoding transmissions on the PSSCH, information for use in a HARQ process, etc. As a result, the anchor UE 305-1 and the client UE 305-2 may exchange data on the PSSCH and may exchange acknowledgement (and / or negative acknowledgement) signals using a HARQ process.

[0082] As mentioned above, Figure 5 are provided as examples. Other examples may differ from the reference Figure 5 As described.

[0083] Fig. 6A 6 is a diagram illustrating an example 600 of resource allocation for sidelink communications according to various aspects of the present disclosure. Fig. 6A As shown, sidelink communications can occupy one or more resource pools across the frequency domain and the time domain. As shown in example 600, the frequency domain can be divided into subchannels. As used herein, a "subchannel" can refer to one or more subcarriers within an LTE, 5G, or other wireless communication structure. In addition, a subcarrier can include one or more frequencies that can be aggregated in some aspects. As further shown in example 600, the time domain can be divided into time slots. As used herein, a "time slot" can refer to a portion of a radio frame within an LTE, 5G, or other wireless communication structure. In some aspects, a time slot can include one or more symbols (e.g., as described below in conjunction with Figure 6B and 6C In addition, a "symbol" may refer to an Orthogonal Frequency Division Multiplexing (OFDM) symbol or other similar symbols within a time slot.

[0084] In some aspects, a base station (e.g., base station 110) may allocate subchannels and time slots to an anchor UE (e.g., anchor UE 305-1) (e.g., via radio resource configuration (RRC), etc.) for use on a sidelink channel. Thus, anchor UE 305-1 may also allocate subchannels and time slots to a client UE (e.g., client UE 305-2) based at least in part on the subchannels and time slots allocated by base station 110 (e.g., via RRC, etc.). Additionally or alternatively, anchor UE 305-1 and / or client UE 305-2 may be preloaded (e.g., programmed, stored, etc.) with subchannels and / or time slots for sidelink communications.

[0085] In some aspects, symbols within a time slot may be reserved for specific sidelink communications (eg, in accordance with 3GPP specifications, etc.). Figure 6B and 6C 6 is a diagram illustrating an example of a slot structure 610, 620 for sidelink communications according to various aspects of the present disclosure. Figure 6B and 6C , but the description also applies to time slots with any number of symbols, such as 12, 13, 15, 16, etc.

[0086] like Figure 6B and 6C As shown, the last symbol (e.g., symbol 13) can be reserved for the gap to prevent inter-slot interference. Additionally or alternatively, the first symbol (e.g., symbol 0) can be reserved for automatic gain control (AGC). Figure 6B As shown, the remaining symbols (e.g., symbols 1-12) can be used for PSSCH. Figure 6B and 6C As shown, the PSCCH may be configured for two, three, etc. symbols (eg, symbols 1-3 in examples 610 and 620).

[0087] In some aspects, such as Figure 6C As shown, a time slot may include symbols of a physical sidelink feedback channel (PSFCH). Thus, one symbol may be reserved for an additional slot (e.g., symbol 10), and one, two, etc. symbols may be reserved for PSFCH (e.g., symbols 11 and 12). Additionally or alternatively, at least one symbol reserved for PSFCH may be used for AGC.

[0088] In some aspects, the PSFCH may be configured to have a period greater than 1. For example, it may be configured for the PSFCH every two, four, etc. slots. Thus, some slots may be configured similar to example 610, while other slots may be configured similar to example 620.

[0089] As mentioned above, providing Figures 6A-6C As an example. Other examples may differ from the reference Figures 6A-6C As described.

[0090] In some cases, the base station may allocate resources (e.g., subchannels, time slots, or a combination thereof) to the anchor UE for use on the sidelink channel. However, the anchor UE may not use all resources allocated by the base station and / or may use the resources allocated by the base station only in certain time periods. Therefore, resources allocated by the base station to the anchor UE but not used by the anchor UE are wasted and increase network overhead.

[0091] The techniques and apparatus described herein allow a base station (e.g., base station 110) to use resources that the base station 110 allocates to an anchor UE (e.g., anchor UE 305-1) but that the anchor UE 305-1 does not use. Thus, the base station 110 can prevent resources from being reserved but not used, thereby reducing network overhead. In addition, the base station 110 can use these resources while still avoiding interference with the sidelink communications of the anchor UE 305-1.

[0092] Fig. 7A and 7B 700 and 710 are diagrams illustrating examples 700 and 710 associated with signal-based resource sharing between an anchor UE and a base station in accordance with various aspects of the present disclosure. Examples 700 and 710 illustrate time slot configurations including symbols that allow a UE (e.g., anchor UE 305-1) to indicate to a base station (e.g., base station 110) whether one or more resources allocated to the anchor UE 305-1 for a sidelink channel are to be used by the anchor UE 305-1 for sidelink communications with one or more client UEs (e.g., client UE 305-2).

[0093] In some aspects, the anchor UE 305-1 may send a control channel message to the base station 110. Thus, the base station 110 may receive the control channel message from the anchor UE 305-1. In some aspects, the control channel message may indicate that at least a portion of a set of resources will be used by the anchor UE 305-1. Thus, the base station 110 may avoid using the portion of the set of resources. Additionally or alternatively, the control channel message may indicate that at least a portion of a set of resources will not be used by the anchor UE 305-1. Thus, the base station 110 may use the portion of the set of resources to communicate with other UEs (e.g., UEs not on the sidelink channel).

[0094] like Fig. 7A As shown in example 700 of Fig. 7A For example, anchor UE 305-1 may send a PSCCH message to base station 110 to indicate whether anchor UE 305-1 will use at least a portion of a set of resources. Fig. 7A As further shown in example 700 of , the anchor UE 305 - 1 may send a PSCCH message in a selected subchannel and / or configured symbol (eg, symbol 1 ).

[0095] In some aspects, the PSCCH message may be sent in resources defined by RRC. For example, the base station 110 may allocate selected subchannels and / or configured symbols for the PSCCH message, and / or the anchor UE 305-1 may preload (e.g., program, store, etc.) the selected subchannels and / or configured symbols.

[0096] In some aspects, the anchor UE 305-1 may provide a signal based at least in part on the PSSCH (eg, Fig. 7A In some aspects, the base station 110 may decode the PSCCH message by performing SCI decoding on the selected subchannel. For example, the base station 110 may decode the PSCCH message similar to decoding piggyback uplink control information (UCI).

[0097] Additionally or alternatively, such as Figure 7B As shown in example 710, the control channel message may include UCI. Figure 7B As further shown in FIG. 1 , UCI may be sent on PUCCH (in Figure 7B For example, anchor UE 305-1 may send UCI in a PUCCH message to base station 110 to indicate whether anchor UE 305-1 will use at least a portion of a set of resources. Figure 7B As further shown in example 710 of , anchor UE 305-1 may send a PUCCH message in a selected subchannel and / or in configured symbols (eg, symbols 2 and 3). Figure 7B As further shown in example 710 of , the anchor UE 305-1 can use time division duplexing for the PUCCH message (eg, by using multiple symbols instead of one symbol). Thus, the anchor UE 305-1 can avoid rate matching the PUCCH message around other PUCCH messages in the same time slot.

[0098] In some aspects, the PUCCH message may be sent in resources defined by RRC. For example, the base station 110 may allocate selected subchannels and / or configured symbols for the PUCCH message, and / or the anchor UE 305-1 may be preloaded (e.g., programmed, stored, etc.) with selected subchannels and / or configured symbols.

[0099] In some aspects, the anchor UE 305-1 may provide a signal based at least in part on the PSSCH (eg, Fig. 7A The anchor UE 305-1 may rate match the PUCCH message by using the PSSCH around the PSCCH message in the example 700 of FIG. 1 . For example, when the transmission on the sidelink channel (e.g., PC5 interface) and the transmission on the uplink with the base station 110 (e.g., Uu interface) are not time division duplex, the anchor UE 305-1 may rate match the PUCCH message. Therefore, the base station 110 may decode the PUCCH message without blind decoding.

[0100] In some aspects, a control channel message (whether Fig. 7A The PSCCH message shown in Figure 7B The PUCCH message shown in FIG. 304, etc.) may include information indicating how long the anchor UE 305-1 will use (or not use) one or more resources allocated to the anchor UE 305-1 for the sidelink channel. Fig. 7A and / or Figure 7B As shown in the control channel message, the anchor UE 305-1 may indicate to the base station 110 whether the anchor UE 305-1 will use one or more resources.

[0101] In some aspects, when the control channel message indicates that a portion of a set of resources will be used by the anchor UE 305-1, the anchor UE 305-1 can use at least the portion of the set of resources to communicate with at least one second UE (e.g., the client UE 305-2) on the sidelink channel without interference. Additionally or alternatively, when the control channel message indicates that the anchor UE 305-1 will not use a portion of the set of resources, the base station 110 can use at least the portion of the set of resources to communicate with at least one second UE (e.g., a UE not on the sidelink channel, such as the other UEs described above) without interference. As a result, when the anchor UE 305-1 is not using resources allocated to the anchor UE 305-1 for the sidelink channel, the base station 110 can reuse those resources. Therefore, the base station 110 can reduce network overhead while still avoiding interference with the sidelink channel.

[0102] As mentioned above, Fig. 7A and 7B are provided as examples. Other examples may differ from the reference Fig. 7A and 7B As described.

[0103] Figure 8 is a diagram showing another example of signal-based resource sharing between an anchor UE and a base station according to various aspects of the present disclosure. Fig. 7A and 7B Described examples 700 and 710, example 800 depicts a first UE (e.g., anchor UE 305-1) indicating to a base station (e.g., base station 110) whether one or more resources allocated to the anchor UE 305-1 for a sidelink channel will be used by the anchor UE 305-1 for sidelink communications with one or more client UEs (e.g., client UE 305-2). Although described below in conjunction with an anchor UE 305-1 serving one client UE 305-2, the description is equally applicable to an anchor UE 305-1 serving multiple client UEs (e.g., two, three, four, etc.).

[0104] like Figure 8 As shown, the anchor UE 305-1 may schedule sidelink communications with the client UE 305-2. For example, as shown in conjunction with reference numerals 805 and 810, the anchor UE 305-1 may send first control information (e.g., SCI-1) and second control information (e.g., SCI-2) to the client UE 305-2, respectively. In some aspects, as shown above in conjunction with Figure 5 The first control information and the second control information may include a first-level SCI and a second-level SCI, respectively.

[0105] like Figure 8 As further shown in FIG. 1 , and in conjunction with reference numeral 815a, the anchor UE 305-1 may send an SCI to the base station 110. For example, the SCI may include second control information (e.g., SCI-2) that is also sent to the client UE 305-2. In some aspects, the SCI may indicate that a set of resources will be used by the anchor UE 305-1. Additionally or alternatively, the SCI may indicate that a set of resources will not be used by the anchor UE 305-1. For example, the SCI may include an SCI-2 with an additional field that indicates how long the set of resources will be used (or not used) by the anchor UE 305-1.

[0106] In some aspects, the SCI may be sent on the PSSCH. For example, the base station 110 may decode the PSCCH message including the SCI without blind decoding.

[0107] Additionally or alternatively, such as Figure 8 As further shown in FIG. 8 and in conjunction with reference numeral 815b, the anchor UE 305-1 may send a control channel message (eg, as described above in conjunction with FIG. 8) to the base station 110. Fig. 7A and 7B In some aspects, the control channel message may indicate that a set of resources will be used by the anchor UE 305-1. Additionally or alternatively, the control channel message may indicate that a set of resources will not be used by the anchor UE 305-1. For example, the control channel message may indicate how long the set of resources will be used (or not used) by the anchor UE 305-1.

[0108] In some aspects, when the SCI and / or control channel message indicates that the anchor UE 305-1 will use a portion of a set of resources, the anchor UE 305-1 can use at least the portion of the set of resources to communicate with the client UE 305-2 on the sidelink channel without interference. Additionally or alternatively, when the SCI and / or control channel message indicates that the anchor UE 305-1 will not use a portion of the set of resources, the base station 110 can use at least the portion of the set of resources to communicate with at least one second UE (e.g., one or more UEs not on the sidelink channel) without interference. As a result, when the anchor UE 305-1 is not using resources allocated to the anchor UE 305-1 for the sidelink channel, the base station 110 can reuse those resources. Therefore, the base station 110 can reduce network overhead while still avoiding interference with the sidelink channel.

[0109] As mentioned above, Figure 8 are provided as examples. Other examples may differ from the reference Figure 8 As described.

[0110] Fig. 9 900 is a diagram illustrating an example of time slot allocation between an anchor UE (e.g., anchor UE 305-1) and a base station (e.g., base station 110) according to various aspects of the present disclosure. Example 900 illustrates time slot allocation between an anchor UE 305-1 for use on a sidelink channel with one or more client UEs (e.g., client UE 305-2) and a base station 110 for communicating (e.g., over a Uu interface) with one or more other UEs (e.g., UEs not on the sidelink channel). Although described below in conjunction with multiple client UEs 305-2, the following description is equally applicable to one client UE 305-2.

[0111] like Fig. 9 As shown, the first set of resources reserved for the base station 110 (also referred to as "gNB" in example 900) may include a first time slot pattern, and the second set of resources reserved for the anchor UE 305-1 (also referred to as "anchor_0" in example 900) may include a second time slot pattern. In example 900, the first pattern may include every even time slot (e.g., time slot 0, 2, 4, 6, 8, etc.), and the second pattern may include every odd time slot (e.g., time slot 1, 3, 5, 7, 9, etc.). In some aspects, as Fig. 9 As further shown, the first time slot pattern and the second time slot pattern may not overlap.

[0112] Although described in conjunction with a single anchor UE 305-1 ("anchor_0"), the description is equally applicable to multiple anchor UEs. For example, the base station 110 may also allocate the second set of resources among the multiple anchor UEs. For example, in example 900, the base station 110 may allocate every other odd time slot (e.g., time slots 1, 5, 9, etc.) to the first anchor UE and the remaining odd time slots (e.g., time slots 3, 7, etc.) to the second anchor UE.

[0113] In some aspects, the anchor UE 305-1 may also allocate the second set of resources among the plurality of client UEs 305-2. For example, the anchor UE 305-1 may also send a configuration message to at least one UE (e.g., "SL UE 0" in Example 900) of the plurality of client UEs (e.g., "SL UE 0", "SL UE 1", "SL UE 2", "SL UE 3", "SL UE 4", and "SL UE 5" in Example 900), indicating a first subset of the second set of resources reserved for the at least one UE (e.g., "SL UE 0" in Example 900). Fig. 9 As shown, the first subset can be separated from the remaining resources of the second group of resources in the frequency domain (for example, the subset reserved for "SL UE 0" is on a different subchannel from the subset reserved for "SL UE 1", etc.), separated from the remaining resources of the second group of resources in the time domain (for example, the subset reserved for "SL UE 0" includes different time slots from the subset reserved for "SL UE 4", etc.), or separated from the remaining resources of the second group of resources in some combination thereof (for example, the subset reserved for "SL UE 0" is on a different subchannel and includes different time slots from the subset reserved for "SL UE 5"; the subset reserved for "SL UE 3" includes at least one different subchannel and includes different time slots from the subset reserved for "SL UE 0", etc.).

[0114] In addition, the anchor UE 305-1 may also send a configuration message to at least one other UE (e.g., "SL UE 1" in example 900) of the plurality of second UEs, the configuration message indicating a second subset of the second set of resources reserved for the at least one other UE (e.g., "SLUE 1" in example 900). Fig. 9 As further shown in , and similar to the first subset, the second subset can be separated from the first subset in the frequency domain, the time domain, or some combination thereof.

[0115] By using the combination Fig. 9 With the described allocation, the base station 110 can avoid conflicts in the sidelink communications with the anchor UE 305-1. Therefore, the base station 110 can improve the sidelink quality and / or reliability.

[0116] As mentioned above, Fig. 9 are provided as examples. Other examples may differ from the reference Fig. 9 As described.

[0117] Fig.10 1 is a diagram illustrating an example 1000 of starting points within a time slot of an anchor UE (eg, anchor UE 305-1) and a base station (eg, base station 110) according to various aspects of the present disclosure. Fig. 9 Described examples 900, 1000 illustrate time slot allocation between an anchor UE 305-1 for communicating with one or more client UEs (e.g., client UE 305-2) on a sidelink channel and a base station 110 for communicating with one or more other UEs (e.g., UEs not on the sidelink channel) (e.g., on a Uu interface). Although described below in conjunction with one client UE 305-2, the following description is equally applicable to multiple client UEs 305-2.

[0118] Similar to combining Fig. 9 In the described example 900, the base station 110 may have allocated a first set of resources including a first time slot pattern reserved for the base station 110 (also referred to as a "gNB" in the example 1000), and a second set of resources including a second time slot pattern reserved for the anchor UE 305-1 (also referred to as an "anchor" in the example 1000). In the example 1000, the first pattern may include every even time slot (e.g., time slots 0, 2, 4, 6, 8, etc.), and the second pattern may include every odd time slot (e.g., time slots 1, 3, 5, 7, 9, etc.).

[0119] like Fig.10 As further shown in , the anchor UE 305-1 may receive from the base station a first indication of a first starting position of the anchor UE 305-1 in at least one resource of the second set of resources reserved for the anchor UE 305-1. In example 1000, the first indication applies to every other odd time slot (e.g., time slots 1, 5, 9, etc.), but may apply to all time slots of the second set of resources or to different time slot patterns in the second set of resources.

[0120] In addition, in example 1000, the first starting position is before the starting position of base station 110, but may also be after the starting position of base station 110. Therefore, when the first starting position is after the starting position of base station 110, anchor UE 305-1 may have priority in the time slot, and (as shown in example 1000) when the starting position of base station 110 is after the first starting position, base station 110 may have priority in the time slot. For example, base station 110 and anchor UE 305-1 may use a listen-before-talk protocol in the second set of resources so that the base station 110 or anchor UE 305-1 that has an earlier starting point in the time slot of the second set of resources has priority to transmit in the time slot. In some aspects, the base station 110 or anchor UE 305-1 that has an earlier starting point in the time slot of the second set of resources may use an extended cyclic prefix when transmitting to fill the gap between the earlier starting point and the later starting point of the other of base station 110 or anchor UE 305-1. Thus, the cyclic prefix can establish priority in a time slot according to a listen-before-talk protocol without sending information that the receiver of the transmission needs to decode.

[0121] Additionally, at least one of the first starting position of the anchor UE 305-1 and the starting position of the base station 110 may be located at a boundary of at least one of the second set of resources. In example 1000, the starting position of the base station 110 is located at the boundary.

[0122] In some aspects, such as Fig.10 As further shown in the example 1000, the anchor UE 305-1 may receive from the base station a second indication of a second starting position of the anchor UE 305-1 in at least one other resource of the second set of resources reserved for the anchor UE 305-1. In the example 1000, the second indication applies to the remaining odd time slots (e.g., time slots 3, 7, etc.), but may apply to all time slots of the second set of resources or to different time slot patterns in the second set of resources.

[0123] In addition, in example 1000, the second starting position is after the starting position of base station 110, but may also be before the starting position of base station 110. Therefore, as shown in example 1000, when the second starting position is after the starting position of base station 110, anchor UE 305-1 may have priority in the time slot, and when the starting position of base station 110 is after the second starting position, base station 110 may have priority in the time slot. For example, as described above, base station 110 and anchor UE 305-1 may use a listen-before-talk protocol in the second set of resources, so that the base station 110 or anchor UE 305-1 that has an earlier starting point in the time slot of the second set of resources has priority to transmit in the time slot. In some aspects, as described above, the base station 110 or anchor UE 305-1 that has an earlier starting point in the time slot of the second set of resources may use an extended cyclic prefix when transmitting to fill the gap between the earlier starting point and the later starting point of the other of base station 110 or anchor UE 305-1.

[0124] Additionally, as described above, at least one of the second starting position of the anchor UE 305-1 and the starting position of the base station 110 may be located at a boundary of at least one of the second set of resources. In example 1000, the second starting position is located at the boundary.

[0125] By using the combination Fig.10 Based on the contention-based process described, the base station 110 can reuse the resources allocated to the anchor UE 305-1 without interfering with the sidelink communication of the anchor UE 305-1. Therefore, the base station 110 can reduce network overhead.

[0126] As mentioned above, Fig.10 are examples. Other examples may differ from the reference Fig.10 As described.

[0127] Fig.11 1 is a diagram illustrating an example 1100 of contention-based resource sharing between an anchor UE 305-1 and a base station 110 in accordance with various aspects of the present disclosure. Fig.11 As shown, example 1100 includes a first UE (e.g., anchor UE 305-1) communicating with at least one second UE (e.g., client UE 305-2) on a sidelink channel, and a base station 110 communicating with at least one third UE (e.g., a UE not on the sidelink channel, such as UE 120) (e.g., on a Uu interface). Although described below in conjunction with one client UE 305-2, the following description is equally applicable to multiple client UEs 305-2.

[0128] As shown in conjunction with reference numeral 1105, the base station 110 may send a configuration message to the anchor UE 305-1. Thus, as further shown in conjunction with reference numeral 1105, the anchor UE 305-1 may receive the configuration message from the base station 110. In some aspects, the configuration message may indicate a first set of resources reserved for the base station 110 and a second set of resources reserved for the anchor UE 305-1.

[0129] In some aspects, the first set of resources and the second set of resources may be allocated at least partially in the frequency domain. For example, the first set of resources may include at least one subchannel not included in the second set of resources, and / or the second set of resources may include at least one subchannel not included in the first set of resources. Additionally or alternatively, the first set of resources and the second set of resources may be allocated at least partially in the time domain. For example, the first set of resources may include at least one time slot not included in the second set of resources, and / or the second set of resources may include at least one time slot not included in the first set of resources.

[0130] In some aspects (e.g., as described above in conjunction with Fig. 9 The first group of resources may include a first time slot pattern, and the second group of resources may include a second time slot pattern. For example, the first time slot pattern and the second time slot pattern may not overlap.

[0131] Additionally or alternatively, in some aspects and as above in combination Fig.10 As described above, the base station 110 may also send to the anchor UE 305-1 a first indication of a first starting position of the anchor UE 305-1 in at least one resource of the second set of resources reserved for the anchor UE 305-1. Fig.10 As described above, the base station 110 may also send to the anchor UE 305-1 a second indication of a second starting position of the anchor UE 305-1 in at least one resource of the second set of resources reserved for the anchor UE 305-1. Fig.10 As described, the base station 110 may configure respective priorities of the base station 110 and the anchor UE 305-1 in the second set of resources based at least in part on the first starting position, the second starting position, or a combination thereof.

[0132] In some aspects, the anchor UE 305-1 may also allocate the second set of resources among the plurality of client UEs. Fig. 9 As described, the anchor UE 305-1 may send a configuration message to at least one UE (e.g., the client UE 305-2) of the plurality of client UEs, the configuration message indicating a first subset of the second set of resources reserved for the at least one UE. In some aspects, the first subset may be separated from the remaining resources of the second set of resources in the frequency domain, the time domain, or some combination thereof (e.g., as described above in conjunction with Fig. 9described above).

[0133] In addition, in some aspects, as described above in conjunction with Fig. 9 As described, the anchor UE 305-1 may send a configuration message to at least one other UE in the plurality of client UEs, the configuration message indicating a second subset of the second set of resources reserved for the at least one other UE. In some aspects, the second subset may be separated from the first subset in the frequency domain, the time domain, or some combination thereof (e.g., as described above in conjunction with Fig. 9 described above).

[0134] As shown in conjunction with reference numeral 1110, the anchor UE 305-1 may schedule sidelink communications with the client UE 305-2. For example, the anchor UE 305-1 may send first control information (e.g., SCI-1) and second control information (e.g., SCI-2) to the client UE 305-2. In some aspects, as described above in conjunction with Figure 5 The first control information and the second control information may include a first-level SCI and a second-level SCI, respectively.

[0135] As shown in conjunction with reference numeral 1115, the anchor UE 305-1 may communicate with the client UE 305-2 on the sidelink channel using the second set of resources. For example, the anchor UE 305-1 may exchange data with the client UE 305-2 on a PSSCH established in the second set of resources, exchange control information with the client UE 305-2 on a PSCCH established in the second set of resources, and / or exchange feedback signals with the client UE 305-2 on a PSFCH established in the second set of resources.

[0136] In some aspects, communicating with the client UE 305-2 may include sending an SCI to the client UE 305-2, the SCI indicating that the anchor UE 305-1 and the client UE 305-2 are using one or more resources in the second set of resources. As described below in conjunction with reference numeral 1120, the base station 110 may decode the SCI to determine whether the base station 110 can use one or more resources in the second set of resources (e.g., when the anchor UE 305-1 and the client UE 305-2 are not using one or more resources in the second set of resources). In some aspects, the base station 110 may decode the SCI using blind decoding and / or rate matching.

[0137] As shown in conjunction with reference numeral 1120, the base station 110 may communicate with at least one second UE (e.g., UE 120) using the first set of resources. For example, the base station 110 may exchange data with the UE 120 on a PUSCH and / or a PDSCH established in the first set of resources, and / or exchange control information with the UE 120 on a PUCCH and / or a PDCCH established in the first set of resources.

[0138] In some aspects, the base station 110 may receive the SCI from the anchor UE 305-1 (e.g., as described above in conjunction with reference numeral 1115). Accordingly, the base station 110 may communicate with the UE 120 using the second set of resources (e.g., in addition to or in place of the first set of resources) based at least in part on determining that the SCI indicates that one or more of the second set of resources are not used by the anchor UE 305-1. For example, the base station 110 may exchange data with the UE 120 on a PUSCH and / or PDSCH established in the second set of resources, and / or exchange control information with the UE 120 on a PUCCH and / or PDCCH established in the second set of resources.

[0139] Therefore, by using the combination Figure 9-11 Based on the contention-based resource sharing described, the base station 110 can communicate with the UE 120 without interfering with the communication between the anchor UE 305-1 and the client UE 305-2. In addition, when the anchor UE 305-1 is not using the resources allocated to the anchor UE 305-1, the base station 110 can reuse those resources. Therefore, the base station 110 can reduce network overhead while still avoiding interference with the sidelink channel between the anchor UE 305-1 and the client UE 305-2.

[0140] Combination Figure 9-11 The described contention-based resource sharing between the anchor UE 305-1 and the base station 110 may be combined with Figure 7A-8 The anchor UE 305-1 and the base station 110 may be combined with the signal-based resource sharing between the anchor UE 305-1 and the base station 110. For example, the anchor UE 305-1 may send one or more control channel messages to the base station 110 (e.g., as described in conjunction with examples 710 and 720), the control channel message indicating which resources of the second set of resources allocated by the base station 110 are to be used by the anchor UE 305-1 (e.g., as described in conjunction with examples 900 and 1000). In another example, the anchor UE 305-1 may send an SCI-2 to the base station 110 (e.g., as described in conjunction with example 800), the SCI-2 indicating which resources of the second set of resources allocated by the base station 110 are to be used by the anchor UE 305-1 (e.g., as described in conjunction with examples 900 and 1000). In yet another example, the base station 110 may decode the SCI (e.g., as described above in conjunction with reference numbers 1115 and 1120) to determine whether the anchor UE 305-1 is using the current time slot, and decode one or more control channel messages from the anchor UE 305-1 (e.g., as described in conjunction with examples 710 and 720) and / or SCI-2 (e.g., as described in conjunction with example 800) to determine whether the anchor UE 305-1 will use a future time slot.

[0141] As mentioned above, Fig.11 Provided as an example. Other examples may vary from reference Fig.11 As described.

[0142] Fig.12 1 is a diagram illustrating an example process 1200 performed, for example, by a first UE, in accordance with various aspects of the present disclosure. Example process 1200 is an example in which a first UE (e.g., UE 120, anchor UE 305-1, etc.) performs operations associated with resource sharing between a base station and the first UE on a sidelink channel.

[0143] like Fig.12 As shown, in some aspects, process 1200 may include receiving a configuration message from a base station (block 1210). For example, as described above, a first UE (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) may receive a configuration message from a base station (e.g., base station 110, etc.). In some aspects, the configuration message indicates a first set of resources reserved for the base station and a second set of resources reserved for the first UE.

[0144] like Fig.12 As further shown, in some aspects, process 1200 may include communicating with at least one second UE on a sidelink channel using the second set of resources (block 1220). For example, as described above, the first UE (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) may communicate with at least one second UE (e.g., client UE 305-2, etc.) on a sidelink channel using the second set of resources.

[0145] Process 1200 may include additional aspects, such as any single aspect or any combination of aspects described below, and / or in conjunction with one or more other processes described elsewhere herein.

[0146] In a first aspect, a first UE is an anchor on a sidelink channel and at least one second UE is a client on the sidelink channel.

[0147] In a second aspect, alone or in combination with the first aspect, the first set of resources and the second set of resources are allocated at least partially in the frequency domain.

[0148] In a third aspect, alone or in combination with one or more of the first and second aspects, the first set of resources and the second set of resources are allocated at least partially in the time domain.

[0149] In a fourth aspect, alone or in combination with one or more of the first to third aspects, the first set of resources comprises a first time slot pattern, and the second set of resources comprises a second time slot pattern, wherein the first time slot pattern and the second time slot pattern do not overlap.

[0150] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, the at least one second UE includes a second UE.

[0151] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the at least one second UE includes a plurality of second UEs.

[0152] In a seventh aspect, either alone or in combination with one or more of the first to sixth aspects, process 1200 further includes sending a configuration message to at least one UE among a plurality of second UEs, the configuration message indicating a first subset of a second set of resources reserved for the at least one UE.

[0153] In an eighth aspect, either alone or in combination with one or more of the first to seventh aspects, the first subset and remaining resources of the second group of resources are separated in the frequency domain, the time domain, or some combination thereof.

[0154] In a ninth aspect, either alone or in combination with one or more of the first to eighth aspects, process 1200 further includes sending a configuration message to at least one other UE among a plurality of second UEs, the configuration message indicating a second subset of a second group of resources reserved for the at least one other UE.

[0155] In a tenth aspect, alone or in combination with one or more of the first to ninth aspects, the second subset is separated from the first subset in the frequency domain, the time domain, or some combination thereof.

[0156] In an eleventh aspect, either alone or in combination with one or more of the first to tenth aspects, process 1200 further comprises receiving, from a base station, a first indication of a first starting position of the first UE in at least one resource of a second set of resources reserved for the first UE.

[0157] In a twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, the first starting position of the first UE is after the starting position of the base station or before the starting position of the base station.

[0158] In the thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, at least one of the first starting position of the first UE and the starting position of the base station is located at a boundary of at least one of the second set of resources.

[0159] In a fourteenth aspect, either alone or in combination with one or more of the first to thirteenth aspects, process 1200 further comprises receiving from the base station a second indication of a second starting position of the first UE in at least one other resource of a second set of resources reserved for the first UE.

[0160] In the fifteenth aspect, alone or in combination with one or more of the first to fourteenth aspects, communicating with at least one second UE includes: sending an SCI to the at least one second UE, the SCI indicating whether one or more of the second group of resources are being used by the first UE and the at least one second UE.

[0161] although Fig.12 An example block diagram of process 1200 is shown, but in some aspects, process 1200 may include more Fig.12 The blocks shown in the process 1200 may be more blocks, fewer blocks, different blocks, or blocks in a different arrangement than those shown in the process 1200. Additionally or alternatively, two or more blocks of the process 1200 may be executed in parallel.

[0162] Fig.13 is a diagram illustrating an example process 1300, performed, for example, by a base station, in accordance with various aspects of the present disclosure. Example process 1300 is an example of operations performed by a base station (eg, base station 110, etc.) associated with resource sharing between the base station and an anchor UE on a sidelink channel.

[0163] like Fig.13 As shown, in some aspects, process 1300 may include sending a configuration message to the first UE (block 1310). For example, the base station (e.g., using transmit processor 220, receive processor 238, controller / processor 240, memory 242, etc.) may send the configuration message to the first UE (e.g., anchor UE 305-1, etc.), as described above. In some aspects, the configuration message indicates a first set of resources reserved for the base station and a second set of resources reserved for the first UE.

[0164] like Fig.13 As further shown, in some aspects, process 1300 may include communicating with at least one second UE using the first set of resources (block 1320). For example, as described above, the base station (e.g., using transmit processor 220, receive processor 238, controller / processor 240, memory 242, etc.) may communicate with at least one second UE using the first set of resources.

[0165] Process 1300 may include additional aspects, such as any single aspect or any combination of aspects described below, and / or in conjunction with one or more other processes described elsewhere herein.

[0166] In a first aspect, a first UE is an anchor on a sidelink channel and at least one third UE is a client on the sidelink channel.

[0167] In a second aspect, alone or in combination with the first aspect, the first set of resources and the second set of resources are allocated at least partially in the frequency domain.

[0168] In a third aspect, alone or in combination with one or more of the first and second aspects, the first set of resources and the second set of resources are allocated at least partially in the time domain.

[0169] In a fourth aspect, alone or in combination with one or more of the first to third aspects, the first set of resources comprises a first time slot pattern, and the second set of resources comprises a second time slot pattern, wherein the first time slot pattern and the second time slot pattern do not overlap.

[0170] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, the first UE is configured to communicate with a third UE.

[0171] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the first UE is configured to communicate with a plurality of third UEs.

[0172] In a seventh aspect, either alone or in combination with one or more of the first to sixth aspects, process 1300 further comprises sending to the first UE a first indication of a first starting position of the first UE in at least one resource of a second set of resources reserved for the first UE.

[0173] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, the first starting position of the first UE is after the starting position of the base station or before the starting position of the base station.

[0174] In a ninth aspect, either alone or in combination with one or more of the first to eighth aspects, at least one of the first starting position of the first UE and the starting position of the base station is located at a boundary of at least one of the second set of resources.

[0175] In a tenth aspect, either alone or in combination with one or more of the first to ninth aspects, process 1300 further comprises sending to the first UE a second indication of a second starting position of the first UE in at least one other resource of a second set of resources reserved for the first UE.

[0176] In an eleventh aspect, alone or in combination with one or more of the first to tenth aspects, process 1300 also includes receiving an SCI from the first UE, the SCI indicating whether the first UE is using one or more resources of the second set of resources on a sidelink channel.

[0177] In a twelfth aspect, either alone or in combination with one or more of aspects one to eleven, process 1300 includes communicating with at least one second UE using one or more of the second group of resources based at least in part on determining that the SCI indicates that one or more of the second group of resources are not being used by the first UE.

[0178] although Fig.13 An example block diagram of process 1300 is shown, but in some aspects, process 1300 may include more Fig.13 The blocks shown in the process 1300 may be more blocks, fewer blocks, different blocks, or blocks in a different arrangement than those shown in the process 1300. Additionally or alternatively, two or more blocks of the process 1300 may be executed in parallel.

[0179] Fig.14 1 is a diagram illustrating an example process 1400 performed, for example, by a first UE, in accordance with various aspects of the present disclosure. Example process 1400 is an example of operations in which a first UE (e.g., UE 120, anchor UE 305-1, etc.) performs operations associated with resource sharing between a base station and the first UE on a sidelink channel.

[0180] like Fig.14 As shown, in some aspects, process 1400 may include sending a control channel message to a base station (block 1410). For example, as described above, a first UE (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) may send a control channel message to a base station (e.g., base station 110, etc.). In some aspects, the control channel message indicates a set of resources to be used by the first UE.

[0181] like Fig.14 As further shown, in some aspects, process 1400 may include communicating with at least one second UE on a sidelink channel using the set of resources (block 1420). For example, as described above, a first UE (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) may communicate with at least one second UE (e.g., client UE 305-2, etc.) on a sidelink channel using the set of resources.

[0182] Process 1400 may include additional aspects, such as any single aspect or any combination of aspects described below, and / or in conjunction with one or more other processes described elsewhere herein.

[0183] In a first aspect, a first UE is an anchor on a sidelink channel and at least one second UE is a client on the sidelink channel.

[0184] In a second aspect, alone or in combination with the first aspect, the control channel message comprises a PSCCH message.

[0185] In a third aspect, alone or in combination with one or more of the first and second aspects, the PSCCH message is sent in resources defined by the radio resource configuration.

[0186] In a fourth aspect, alone or in combination with one or more of the first to third aspects, the first UE rate matches a PSCCH message based at least in part on the PSSCH.

[0187] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, the control channel message includes UCI.

[0188] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, UCI is sent on a PUCCH.

[0189] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, the first UE rate matches the PUCCH based at least in part on the PSSCH.

[0190] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, the control channel message comprises an SCI.

[0191] In a ninth aspect, alone or in combination with one or more of the first to eighth aspects, the SCI is sent on the PSSCH.

[0192] although Fig.14 An example block diagram of process 1400 is shown, but in some aspects, process 1400 may include more Fig.14 The blocks shown in the process 1400 may be more blocks, fewer blocks, different blocks, or blocks in a different arrangement than those shown in the process 1400. Additionally or alternatively, two or more blocks of the process 1400 may be executed in parallel.

[0193] Fig.15 is a diagram illustrating an example process 1500, performed, for example, by a base station, in accordance with various aspects of the present disclosure. Example process 1500 is an example of operations performed by a base station (eg, base station 110, etc.) associated with resource sharing between the base station and an anchor UE on a sidelink channel.

[0194] like Fig.15 As shown, in some aspects, process 1500 may include receiving a control channel message from a first UE (block 1510). For example, a base station (e.g., using transmit processor 220, receive processor 238, controller / processor 240, memory 242, etc.) may receive a control channel message from a first UE (e.g., anchor UE 305-1, etc.), as described above. In some aspects, the control channel message indicates that a set of resources will not be used by the first UE.

[0195] like Fig.15 As further shown, in some aspects, process 1500 may include communicating with at least one second UE using the set of resources (block 1520). For example, as described above, the base station (e.g., using transmit processor 220, receive processor 238, controller / processor 240, memory 242, etc.) may communicate with at least one second UE using the set of resources.

[0196] Process 1500 may include additional aspects, such as any single aspect or any combination of aspects described below, and / or in conjunction with one or more other processes described elsewhere herein.

[0197] In a first aspect, a first UE is an anchor on a sidelink channel and at least one third UE is a client on the sidelink channel.

[0198] In a second aspect, alone or in combination with the first aspect, the control channel message comprises a PSCCH message.

[0199] In a third aspect, alone or in combination with one or more of the first and second aspects, the PSCCH message is sent in resources defined by the radio resource configuration.

[0200] In a fourth aspect, alone or in combination with one or more of the first to third aspects, a PSCCH message is rate matched based at least in part on the PSSCH.

[0201] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, the control channel message includes UCI.

[0202] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, UCI is sent on a PUCCH.

[0203] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, PUCCH is rate matched based at least in part on the PSSCH.

[0204] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, the control channel message comprises an SCI.

[0205] In a ninth aspect, alone or in combination with one or more of the first to eighth aspects, the SCI is sent on the PSSCH.

[0206] although Fig.15 An example block diagram of process 1500 is shown, but in some aspects, process 1500 may include more Fig.15The blocks shown in the process 1500 may be more blocks, fewer blocks, different blocks, or blocks in a different arrangement than those shown in the process 1500. Additionally or alternatively, two or more blocks of the process 1500 may be executed in parallel.

[0207] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit these aspects to the precise forms disclosed. Modifications and variations are possible in light of the above disclosure or may be acquired from practice of these aspects.

[0208] 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. It is apparent that the systems and / or methods described herein may be implemented in different forms of hardware, firmware, and / or a combination of hardware and software. The actual dedicated control hardware or software code used to implement these systems and / or methods does not limit these aspects. Therefore, the operation and behavior of the systems and / or methods are described herein without reference to specific software code—it should be understood that software and hardware may be designed to implement the systems and / or methods based at least in part on the description herein.

[0209] 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.

[0210] Even if a particular combination of features is stated 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 a manner not specifically stated in the claims and / or not disclosed in the specification. Although each dependent claim listed below may directly depend on only one claim, the disclosure of the various aspects includes the combination of each dependent claim with each other claim in the claim set. The phrase referring to "at least one" in a series of items refers to any combination of these items, including single members. For example, "at least one of a, b or c" is intended to cover a, b, c, ab, ac, bc and abc, as well as any combination with multiple identical elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc and cccc or any other order of a, b, and c.

[0211] Unless explicitly described, any element, action or instruction used in this article should not be interpreted as critical or necessary. In addition, as used herein, the articles "one" 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 article "the" is intended to include one or more items related to the article "the", and can be used interchangeably with "the 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, combinations of related and unrelated items, etc.), and can be used interchangeably with "one or more". If only one item is referred to, the phrase "only one" or similar language is used. In addition, as used herein, the terms "have", "have", "with", etc. are intended to be open terms. In addition, the phrase "based on" is intended to mean "based at least in part", unless otherwise clearly stated. In addition, as used herein, the term "or" is inclusive when used in a series, and can be used interchangeably with "and / or", unless otherwise clearly stated (e.g., if used in combination with "either" or "only one").

Claims

1. A method of wireless communication performed by a first user equipment (UE), comprising: receiving a configuration message from a base station, wherein the configuration message indicates a first set of resources reserved for the base station and a second set of resources reserved for the first UE; and The second set of resources is used to communicate with at least one second UE on a sidelink channel, wherein the first UE is an anchor on the sidelink channel and the at least one second UE is a client on the sidelink channel.

2. The method according to claim 1, wherein: The first set of resources and the second set of resources are allocated at least partially in the frequency domain, at least partially in the time domain, or some combination thereof.

3. The method of claim 1, wherein the first set of resources comprises a first time slot pattern and the second set of resources comprises a second time slot pattern, wherein the first time slot pattern and the second time slot pattern do not overlap.

4. The method according to claim 1, wherein: The at least one second UE includes one second UE.

5. The method according to claim 1, wherein: The at least one second UE includes a plurality of second UEs.

6. The method according to claim 5, further comprising: A configuration message is sent to at least one UE of the plurality of second UEs, the configuration message indicating a first subset of a second set of resources reserved for the at least one UE.

7. The method of claim 6, wherein the first subset is separated from remaining resources of the second set of resources in the frequency domain, the time domain, or some combination thereof.

8. The method according to claim 6, further comprising: A configuration message is sent to at least one other UE of the plurality of second UEs, the configuration message indicating a second subset of the second set of resources reserved for the at least one other UE.

9. The method of claim 8, wherein the second subset is separated from the first subset in the frequency domain, the time domain, or some combination thereof.

10. The method according to claim 1, further comprising: A first indication of a first starting position of the first UE in at least one resource in a second set of resources reserved for the first UE is received from the base station. The method according to claim 10 , wherein the first starting position of the first UE is after the starting position of the base station or before the starting position of the base station.

12. The method according to claim 11, wherein: At least one of the first starting position of the first UE and the starting position of the base station is located at a boundary of at least one of the second set of resources.

13. The method according to claim 10, further comprising: A second indication of a second starting position of the first UE in at least one other resource in a second set of resources reserved for the first UE is received from the base station.

14. The method according to claim 1, wherein: Communicating with the at least one second UE includes: Sidelink control information (SCI) is sent to the at least one second UE indicating whether one or more of the second set of resources are being used by the first UE and the at least one second UE.

15. A method of wireless communication performed by a base station, comprising: Sending a configuration message to a first user equipment (UE), wherein the configuration message indicates a first set of resources reserved for the base station and a second set of resources reserved for the first UE; and communicating with at least one second UE using the first set of resources, wherein the first UE communicates with at least one third UE on a sidelink channel using the second set of resources; Wherein the first UE is an anchor on the sidelink channel, and the at least one third UE is a client on the sidelink channel.

16. The method according to claim 15, wherein: The first set of resources and the second set of resources are allocated at least partially in the frequency domain, at least partially in the time domain, or some combination thereof.

17. The method of claim 15, wherein the first set of resources comprises a first time slot pattern and the second set of resources comprises a second time slot pattern, wherein the first time slot pattern and the second time slot pattern do not overlap.

18. The method according to claim 15, wherein: The first UE is configured to communicate with a third UE or with multiple third UEs.

19. The method according to claim 15, further comprising: A first indication of a first starting position of the first UE in at least one resource in a second set of resources reserved for the first UE is sent to the first UE.

20. The method according to claim 19, wherein: The first starting position of the first UE is after the starting position of the base station or before the starting position of the base station.

21. The method according to claim 20, wherein: At least one of the first starting position of the first UE and the starting position of the base station is located at a boundary of at least one of the second set of resources.

22. The method of claim 19, further comprising: A second indication of a second starting position of the first UE in at least one other resource of a second set of resources reserved for the first UE is sent to the first UE.

23. The method of claim 15, further comprising: Sidelink control information (SCI) is received from the first UE indicating whether one or more of the second set of resources are being used by the first UE on a sidelink channel.

24. The method according to claim 23, further comprising: Based at least in part on determining that the SCI indicates that one or more resources in the second set of resources are not used by the first UE, communicating with the at least one second UE using one or more resources in the second set of resources.

25. A method of wireless communication performed by a first user equipment (UE), comprising: sending a control channel message to a base station, wherein the control channel message indicates a set of resources to be used by the first UE; and The set of resources is used to communicate with at least one second UE on a sidelink channel, wherein the first UE is an anchor on the sidelink channel and the at least one second UE is a client on the sidelink channel.

26. The method according to claim 25, wherein: The control channel message includes a physical sidelink control channel (PSCCH) message that is rate matched based at least in part on a physical sidelink shared channel (PSSCH).

27. The method according to claim 25, wherein: The control channel message includes uplink control information (UCI) sent on a physical uplink control channel (PUCCH), the PUCCH being rate matched based at least in part on the PSSCH.

28. The method according to claim 25, wherein: The control channel message includes Sidelink Control Information (SCI) sent on the PSSCH.

29. A method of wireless communication performed by a base station, comprising: receiving a control channel message from a first user equipment (UE), wherein the control channel message indicates that a set of resources is not to be used by the first UE; and communicating with at least one second UE using the set of resources, wherein the first UE is an anchor on a sidelink channel and at least one third UE is a client on the sidelink channel; The first UE does not use the set of resources to communicate with the at least one third UE on the side link channel.

30. The method of claim 29, wherein: The control channel message comprises a physical sidelink control channel (PSCCH) message, The PSCCH message is rate matched based at least in part on a physical sidelink shared channel (PSSCH).

31. The method of claim 29, wherein: The control channel message includes uplink control information (UCI) sent on a physical uplink control channel (PUCCH), the PUCCH being rate matched based at least in part on the PSSCH.

32. The method of claim 29, wherein: The control channel message includes Sidelink Control Information (SCI) sent on the PSSCH.

33. A non-transitory computer readable medium having stored thereon one or more instructions executable by one or more processors to implement the method of any one of claims 1-14.

34. A first user equipment (UE) for wireless communication, comprising: Memory; One or more processors coupled to the memory and configured to: receiving a configuration message from a base station, wherein the configuration message indicates a first set of resources reserved for the base station and a second set of resources reserved for the first UE; and The second set of resources is used to communicate with at least one second UE on a sidelink channel, wherein the first UE is an anchor on the sidelink channel and the at least one second UE is a client on the sidelink channel.

35. A first user equipment (UE) for wireless communication, comprising: means for receiving a configuration message from a base station, wherein the configuration message indicates a first set of resources reserved for the base station and a second set of resources reserved for the first UE; and Means for communicating with at least one second UE on a sidelink channel using the second set of resources, wherein the first UE is an anchor on the sidelink channel and the at least one second UE is a client on the sidelink channel.

36. A non-transitory computer readable medium having stored thereon one or more instructions executable by one or more processors to implement the method of any one of claims 15-24.

37. A base station for wireless communication, comprising: Memory; One or more processors coupled to the memory and configured to: Sending a configuration message to a first user equipment (UE), wherein the configuration message indicates a first set of resources reserved for the base station and a second set of resources reserved for the first UE; and communicating with at least one second UE using the first set of resources, wherein the first UE communicates with at least one third UE on a sidelink channel using the second set of resources; Wherein the first UE is an anchor on the sidelink channel, and the at least one third UE is a client on the sidelink channel.

38. A base station for wireless communication, comprising: means for sending a configuration message to a first user equipment (UE), wherein the configuration message indicates a first set of resources reserved for the base station and a second set of resources reserved for the first UE; and means for communicating with at least one second UE using the first set of resources, wherein the first UE communicates with at least one third UE on a sidelink channel using the second set of resources; Wherein the first UE is an anchor on the sidelink channel, and the at least one third UE is a client on the sidelink channel.

39. A non-transitory computer readable medium having stored thereon one or more instructions executable by one or more processors to implement the method of any one of claims 25-28.

40. A first user equipment (UE) for wireless communication, comprising: Memory; One or more processors coupled to the memory and configured to: sending a control channel message to a base station, wherein the control channel message indicates a set of resources to be used by the first UE; and The set of resources is used to communicate with at least one second UE on a sidelink channel, wherein the first UE is an anchor on the sidelink channel and the at least one second UE is a client on the sidelink channel.

41. A first user equipment (UE) for wireless communication, comprising: means for sending a control channel message to a base station, wherein the control channel message indicates a set of resources to be used by the first UE; and Means for communicating with at least one second UE on a sidelink channel using the set of resources, wherein the first UE is an anchor on the sidelink channel and the at least one second UE is a client on the sidelink channel.

42. A non-transitory computer readable medium having stored thereon one or more instructions executable by one or more processors to implement the method of any one of claims 29-32.

43. A base station for wireless communication, comprising: Memory; One or more processors coupled to the memory and configured to: receiving a control channel message from a first user equipment (UE), wherein the control channel message indicates that a set of resources is not to be used by the first UE; and communicating with at least one second UE using the set of resources, wherein the first UE is an anchor on a sidelink channel and at least one third UE is a client on the sidelink channel; The first UE does not use the set of resources to communicate with the at least one third UE on the side link channel.

44. A base station for wireless communication, comprising: means for receiving a control channel message from a first user equipment (UE), wherein the control channel message indicates a set of resources are not to be used by the first UE; and means for communicating with at least one second UE using the set of resources, wherein the first UE is an anchor on a sidelink channel and at least one third UE is a client on the sidelink channel; The first UE does not use the set of resources to communicate with the at least one third UE on the side link channel.

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