Listen before talk reporting for sidelink channels

Abstract

Various aspects of the disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) can receive, from a base station, a resource grant for at least one sidelink channel, where the resource grant indicates a first uplink resource for transmitting a sidelink transmission confirmation message and a second uplink resource for transmitting a listen-before-talk status. The UE can transmit, to the base station, an indication of at least one status associated with a listen-before-talk procedure used on the at least one sidelink channel on the second uplink resource. Numerous other aspects are provided.

Description

[0001] Cross-reference of related applications

[0002] This patent application claims priority to U.S. nonprovisional patent application No. 17 / 091,374, filed on November 6, 2020, entitled “LISTEN-BEFORE-TALKREPORTING FOR SIDELINK CHANNELS,” which is expressly incorporated herein by reference. Technical Field

[0003] Various aspects of this disclosure generally relate to wireless communications, as well as techniques and apparatus for listen-before-speak reporting for side link channels. Background Technology

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunications services, such as telephone, video, data, messaging, and broadcasting. Typical wireless communication systems employ multiple access technologies that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access technologies include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single Carrier Frequency Division Multiple Access (SC-FDMA) systems, Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE / improved LTE is an enhanced set of the Universal Mobile Telecommunications System (UMTS) mobile standard released by the 3rd Generation Partnership Project (3GPP).

[0005] A wireless network may include multiple base stations (BSs) capable of supporting communication for multiple UEs. User equipment (UEs) can communicate with base stations (BSs) via downlinks and uplinks. A downlink (or forward link) refers to the communication link from the BS to the UE, and an uplink (or reverse link) refers to the communication link from the UE to the BS. As will be described in more detail herein, a BS may be referred to as a Node B, gNB, Access Point (AP), Radio Headend, Transmitter-Receiver Point (TRP), New Radio (NR) BS, 5G Node B, etc.

[0006] The above multiple access technologies have been adopted in various telecommunications standards to provide a common protocol enabling different user equipment to communicate at the city, country, regional, and even global levels. New Radio (NR) (which can also be referred to as 5G) is a collection of enhancements to the LTE mobile standard released by the 3rd Generation Partnership Project (3GPP). NR is designed to better integrate with other open standards by improving spectrum efficiency, reducing costs, improving service, utilizing new spectrum, and using Orthogonal Frequency Division Multiplexing (OFDM) with Cyclic Prefix (CP) on the downlink (DL) and CP-OFDM and / or SC-FDM (e.g., also known as Discrete Fourier Transform Extended OFDM (DFT-s-OFDM)) on the uplink (UL), as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technologies and carrier aggregation, thereby better supporting mobile broadband internet access. As the demand for mobile broadband access continues to grow, further improvements to LTE, NR, and other radio access technologies remain useful. Summary of the Invention

[0007] In some aspects, a method of wireless communication performed by a user equipment (UE) includes: receiving from a base station a resource grant for at least one sidelink channel, wherein the resource grant indicates a first uplink resource for transmitting a sidelink transmission acknowledgment message and a second uplink resource for transmitting a listen-before-speak state; and transmitting on the second uplink resource an indication to the base station of at least one state associated with a listen-before-speak process used on at least one sidelink channel.

[0008] In some aspects, a method of wireless communication performed by a base station includes: sending a resource grant to a UE for at least one sidelink channel, wherein the resource grant indicates a first uplink resource for sending a sidelink transmission acknowledgment message and a second uplink resource for sending a listen-before-speak state; and receiving from the UE on the second uplink resource an indication of at least one state associated with a listen-before-speak procedure used on at least one sidelink channel.

[0009] In some aspects, a UE for wireless communication includes: a memory and one or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: receive from a base station resource grants for at least one sidelink channel, wherein the resource grants indicate a first uplink resource for transmitting a sidelink transmission acknowledgment message and a second uplink resource for transmitting a listen-before-speak state; and transmit to the base station on the second uplink resource an indication of at least one state associated with a listen-before-speak procedure used on at least one sidelink channel.

[0010] In some aspects, a base station for wireless communication includes: a memory and one or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: transmit to a UE resource grant for at least one sidelink channel, wherein the resource grant indicates a first uplink resource for transmitting a sidelink transmission acknowledgment message and a second uplink resource for transmitting a listen-before-speak state; and receive from the UE on the second uplink resource an indication of at least one state associated with a listen-before-speak procedure used on at least one sidelink channel.

[0011] In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a UE, cause the UE to: receive from a base station resource grant for at least one sidelink channel, wherein the resource grant indicates a first uplink resource for sending a sidelink transmission acknowledgment message and a second uplink resource for sending a listen-before-speak state; and send to the base station on the second uplink resource an indication of at least one state associated with a listen-before-speak procedure used on at least one sidelink channel.

[0012] In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a base station, cause the base station to: send a resource grant to a UE for at least one sidelink channel, wherein the resource grant indicates a first uplink resource for sending a sidelink transmission acknowledgment message and a second uplink resource for sending a listen-before-speak state; and receive from the UE on the second uplink resource an indication of at least one state associated with a listen-before-speak procedure used on at least one sidelink channel.

[0013] In some aspects, an apparatus for wireless communication includes: a unit for receiving from a base station resource grant for at least one sidelink channel, wherein the resource grant indicates a first uplink resource for transmitting a sidelink transmission acknowledgment message and a second uplink resource for transmitting a listen-before-speak state; and a unit for transmitting to the base station on the second uplink resource an indication of at least one state associated with a listen-before-speak process used on at least one sidelink channel.

[0014] In some aspects, an apparatus for wireless communication includes: a unit for transmitting to a UE resource grant for at least one sidelink channel, wherein the resource grant indicates a first uplink resource for transmitting a sidelink transmission acknowledgment message and a second uplink resource for transmitting a listen-before-speak state; and a unit for receiving from the UE on the second uplink resource an indication of at least one state associated with a listen-before-speak process used on at least one sidelink channel.

[0015] In summary, the terms include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication equipment, and / or processing systems as fully described herein with reference to the accompanying drawings and description, and as illustrated by the drawings and description.

[0016] The foregoing has provided a fairly broad overview of the features and technical advantages of examples according to this disclosure in order to better understand the subsequent specific embodiments. Additional features and advantages will be described below. The disclosed concepts and specific examples can be readily used as the basis for modifying or designing other structures for performing the same purpose as this disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics (both their organization and manner of operation) of the concepts disclosed herein, as well as their associated advantages, will be better understood when considered in conjunction with the accompanying drawings, based on the description below. Each drawing in the accompanying drawings is provided for illustrative and descriptive purposes and is not intended to limit the scope of the claims. Attached Figure Description

[0017] To gain a more detailed understanding of the features of this disclosure, a more specific description of the content briefly outlined above can be obtained by referring to various aspects, some of which are shown in the accompanying drawings. However, it should be noted that the drawings illustrate only certain typical aspects of this disclosure and are therefore not to be considered as limiting its scope, as other equally valid aspects may be acknowledged in the specification. The same reference numerals in different drawings may identify the same or similar elements.

[0018] Figure 1 This is a diagram illustrating examples of wireless networks according to various aspects of this disclosure.

[0019] Figure 2 This is a diagram illustrating an example of communication between a base station and a UE in a wireless network according to various aspects of this disclosure.

[0020] Figure 3 This is a diagram illustrating an example of sidelink communication according to various aspects of this disclosure.

[0021] Figure 4This is a diagram illustrating examples of sidelink communication and access link communication according to various aspects of this disclosure.

[0022] Figure 5 This is a diagram illustrating an example of an acknowledgment message for a side link channel according to various aspects of this disclosure.

[0023] Figure 6 and 7 This is a diagram illustrating examples of listen-before-speak (LBT) reporting associated with various aspects of this disclosure for a side link channel.

[0024] Figure 8 and 9 This is a diagram illustrating an example process associated with LBT reporting for a side link channel according to various aspects of this disclosure.

[0025] Figure 10 and 11 This is a block diagram of an example device for wireless communication according to various aspects of this disclosure. Detailed Implementation

[0026] The various aspects of this disclosure are described more fully below with reference to the accompanying drawings. However, this disclosure may be embodied in many different forms and should not be construed as limited to any particular structure or function given herein. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art. Based on the teachings herein, those skilled in the art will recognize that the scope of this disclosure is intended to cover any aspect of the disclosure herein, whether implemented independently of or in combination with any other aspect of this disclosure. For example, an apparatus or method may be implemented using any number of aspects set forth herein. Furthermore, the scope of this disclosure is intended to cover such apparatuses or methods practiced using structures, functions, or structures and functions other than or different from the aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure herein may be embodied by one or more elements of the claims.

[0027] Several aspects of a telecommunications system will now be described with reference to various devices and techniques. These devices and techniques will be described in the following specific embodiments and illustrated in the accompanying drawings by various frames, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as “elements”). These elements can be implemented using hardware, software, or a combination thereof. Whether such an element is implemented as hardware or software depends on the specific application and the design constraints imposed on the entire system.

[0028] It should be noted that although terms commonly associated with 5G or NR Radio Access Technology (RAT) may be used in this document to describe the aspects, the aspects of this disclosure may be applied to other RATs, such as 3G RAT, 4G RAT and / or RATs after 5G (e.g., 6G).

[0029] Figure 1 This is a diagram illustrating an example of a wireless network 100 according to various aspects of this disclosure. The wireless network 100 may be a 5G (NR) network, an LTE network, etc., or may include elements of a 5G (NR) network, an LTE network, etc. The wireless network 100 may include multiple 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 can provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to the coverage area of ​​a BS and / or the BS subsystem serving that coverage area, depending on the context in which the term is used.

[0030] A BS can provide communication coverage for macrocells, picocells, femtocells, and / or another type of cell. A macrocell can cover a relatively large geographic area (e.g., a radius of several kilometers) and can allow unrestricted access by UEs with service subscriptions. A picocell can cover a relatively small geographic area and can allow unrestricted access by UEs with service subscriptions. A femtocell can cover a relatively small geographic area (e.g., a residential area) and can allow restricted access by UEs associated with that femtocell (e.g., UEs in a Closed User Group (CSG)). A BS used for macrocells can be referred to as a macro BS. A BS used for picocells can be referred to as a pico BS. A BS used for femtocells can be referred to as a femtocell BS or a home BS. Figure 1 In the examples shown, BS 110a can be a macro BS for macro cell 102a, BS 110b can be a pico BS for pico cell 102b, and BS 110c can be a femto BS for femto cell 102c. A BS can support one or more (e.g., three) cells. The terms “eNB,” “base station,” “NR BS,” “gNB,” “TRP,” “AP,” “Node B,” “5G NB,” and “cell” are used interchangeably herein.

[0031] In some respects, the cell may not be stationary, and the geographical area of ​​the cell may move depending on the location of the mobile BS. In some respects, BSs may interconnect with each other and / or with one or more other BSs or network nodes (not shown) in the wireless network 100 using any suitable transport network through various types of backhaul interfaces (such as direct physical connections, virtual networks, etc.).

[0032] 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 transmit the data transmissions to a downstream station (e.g., a UE or a BS). A relay station can also be a UE capable of relaying transmissions to other UEs. Figure 1 In the example shown, relay BS 110d can communicate with macro BS 110a and UE 120d to facilitate communication between BS 110a and UE 120d. A relay BS can also be referred to as a relay station, relay base station, repeater, etc.

[0033] Wireless network 100 can be a heterogeneous network comprising different types of Base Stations (BSs) (e.g., macro BSs, pico BSs, femto BSs, relay BSs, etc.). These different types of BSs can have different transmit power levels, different coverage areas, and different effects on interference in wireless network 100. For example, macro BSs can have high transmit power levels (e.g., 5 to 40 watts), while pico BSs, femto BSs, and relay BSs can have lower transmit power levels (e.g., 0.1 to 2 watts).

[0034] Network controller 130 can be coupled to a group of base stations (BSs) and can provide coordination and control for these BSs. Network controller 130 can communicate with the BSs via backhaul. BSs can also communicate with each other via wireless or wired backhaul (e.g., directly or indirectly).

[0035] UE 120 (e.g., 120a, 120b, 120c) may be distributed throughout the wireless network 100, and each UE may be stationary or mobile. UE may also be referred to as an access terminal, terminal, mobile station, user unit, station, etc. UE may be a cellular phone (e.g., a smartphone), personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, laptop computer, cordless phone, wireless local loop (WLL) station, tablet device, camera, gaming device, netbook, smartbook, ultrabook, medical device or apparatus, biometric sensor / device, wearable device (smartwatch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet, etc.)), entertainment device (e.g., music or video device, or satellite radio unit, etc.), vehicle component or sensor, smart meter / sensor, industrial manufacturing equipment, GPS device, or any other suitable device configured to communicate via wireless or wired media.

[0036] Some UEs can be considered Machine-Type Communication (MTC) or Evolved or Enhanced Machine-Type Communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, instruments, monitors, location tags, etc., which can communicate with a base station, another device (e.g., a remote device), or some other entity. Wireless nodes can provide connectivity to or to a network (e.g., a wide area network such as the Internet or a cellular network) via wired or wireless communication links, for example. Some UEs can be considered Internet of Things (IoT) devices, and / or can be implemented as NB-IoT (Narrowband Internet of Things) devices. Some UEs can be considered Customer Premises Equipment (CPE). UE 120 can be included within a housing that houses the components of UE 120 (e.g., processor components, memory components, etc.). In some aspects, the processor components and memory components can be coupled together. For example, the processor components (e.g., one or more processors) and memory components (e.g., memory) can be operatively coupled, communicatively coupled, electronically coupled, electrically coupled, etc.

[0037] Typically, any number of wireless networks can be deployed in a given geographical area. Each wireless network can support a specific RAT and can operate on one or more frequencies. A RAT can also be referred to as a radio technology, air interface, etc. A frequency can also be referred to as a carrier, frequency channel, etc. Each frequency can support a single RAT in a given geographical area to avoid interference between wireless networks using different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0038] In some respects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly using one or more sidelink channels (e.g., without using base station 110 as an intermediary for communication with each other). For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, mesh networks, etc.). In this case, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by base station 110.

[0039] Devices in the wireless network 100 can communicate using the electromagnetic spectrum, which can be subdivided into various categories, bands, channels, etc., based on frequency or wavelength. For example, devices in the wireless network 100 can communicate using an operating band with a first frequency range (FR1), which can span from 410 MHz to 7.125 GHz, and / or can communicate using an operating band with a second frequency range (FR2), which can span from 24.25 GHz to 52.6 GHz. Frequencies between FR1 and FR2 are sometimes referred to as intermediate frequency (IF) bands. Although a portion of FR1 is greater than 6 GHz, FR1 is generally referred to as the "below 6 GHz" band. Similarly, although different from the extremely high frequency (EHF) band (30 GHz–300 GHz) designated as the "millimeter wave" band by the International Telecommunication Union (ITU), FR2 is generally referred to as the "millimeter wave" band. Therefore, unless otherwise specified, it should be understood that the terms "below 6 GHz," if used herein, can broadly refer to frequencies less than 6 GHz, frequencies within FR1, and / or intermediate frequency (e.g., greater than 7.125 GHz). Similarly, unless otherwise specified, it should be understood that the terms "millimeter wave," if used herein, can broadly refer to frequencies within the EHF band, frequencies within FR2, and / or intermediate frequency (e.g., less than 24.25 GHz). Modifications to the frequencies included in FR1 and FR2 are contemplated, and the techniques described herein are applicable to those modified frequency ranges.

[0040] As pointed out above, Figure 1 This is provided as an example. Other examples may differ from the one provided. Figure 1 As described.

[0041] Figure 2This is a diagram illustrating an example 200 of communication between a base station 110 and a UE 120 in a wireless network 100 according to various aspects of this disclosure. The base station 110 may be equipped with T antennas 234a to 234t, and the UE 120 may be equipped with R antennas 252a to 252r, wherein generally, T ≥ 1 and R ≥ 1.

[0042] At base station 110, transmitting processor 220 can receive data for one or more UEs from data source 212, select one or more modulation and coding schemes (MCS) for each UE based at least in part on channel quality indicators (CQI) received from each UE, process (e.g., code and modulate) the data for each UE based at least in part on the MCS selected for each UE, and provide data symbols for all UEs. Transmitting processor 220 can also process system information (e.g., semi-static resource allocation information (SRPI), etc.) and control information (e.g., CQI requests, grants, upper-layer signaling, etc.), and provide overhead symbols and control symbols. Transmitting processor 220 can 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 signal (PSS) and secondary synchronization signal (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 can perform spatial processing (e.g., precoding, if applicable) on data symbols, control symbols, overhead symbols, and / or reference symbols, and can provide T output symbol streams to T modulators (MODs) 232a to 232t. Each modulator 232 can (e.g., for OFDM, etc.) process its corresponding output symbol stream to obtain an output sample stream. Each modulator 232 can further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a to 232t can be transmitted via T antennas 234a to 234t respectively.

[0043] At UE 120, antennas 252a to 252r can receive downlink signals from base station 110 and / or other base stations, and can provide the received signals to demodulators (DEMODs) 254a to 254r respectively. Each demodulator 254 can adjust (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain an input sample. Each demodulator 254 can further process the input sample (e.g., for OFDM, etc.) to obtain a received symbol. MIMO detector 256 can obtain the received symbols from all R demodulators 254a to 254r, perform MIMO detection on the received symbols (if applicable), and provide the detected symbols. Receive processor 258 can process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to data sink 260, and provide decoded control information and system information to controller / processor 280. The term "controller / processor" can refer to one or more controllers, one or more processors, or a combination thereof. The channel processor can determine the Received Reference Signal Power (RSRP), Received Signal Strength Indicator (RSSI), Received Reference Signal 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.

[0044] Network controller 130 may include communication unit 294, controller / processor 290, and memory 292. Network controller 130 may include one or more devices, such as those in a core network. Network controller 130 may communicate with base station 110 via communication unit 294.

[0045] On the uplink, at UE 120, the transmit processor 264 can receive and process data from data source 262 and control information from controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, CQI, etc.). The transmit processor 264 can also generate reference symbols for one or more reference signals. Symbols from the transmit processor 264 can be pre-coded (if applicable) by the TX MIMO processor 266, further processed by modulators 254a to 254r (e.g., for DFT-s-OFDM, CP-OFDM, etc.), and transmitted to base station 110. In some aspects, UE 120 includes a transceiver. The transceiver can include any combination of antenna 252, modulator and / or demodulator 254, MIMO detector 256, receive processor 258, transmit processor 264, and / or TX MIMO processor 266. The transceiver may be used by a processor (e.g., controller / processor 280) and memory 282 to perform aspects of any of the methods described herein, for example, as referenced Figure 6-9 Described.

[0046] At base station 110, uplink signals from UE 120 and other UEs can be received by antenna 234, processed by demodulator 232, detected by MIMO detector 236 (if applicable), and further processed by receive processor 238 to obtain decoded data and control information transmitted by UE 120. Receive processor 238 can provide decoded data to data sink 239 and decoded control information to controller / processor 240. Base station 110 may include communication unit 244 and communicate with network controller 130 via communication unit 244. Base station 110 may include scheduler 246 for scheduling downlink and / or uplink communications by UE 120. In some aspects, base station 110 includes a transceiver. The transceiver may include any combination of antenna 234, modulator and / or demodulator 232, MIMO detector 236, receive processor 238, transmit processor 220, and / or TX MIMO processor 230. The transceiver may be used by a processor (e.g., controller / processor 240) and memory 242 to perform aspects of any of the methods described herein, for example, as referenced Figure 6-9 Described.

[0047] The controller / processor 240 of base station 110, the controller / processor 280 of UE 120 and / or Figure 2 Any other components may perform one or more techniques associated with LBT reporting for the sidelink channel, as described in more detail elsewhere herein. For example, the controller / processor 240 of base station 110, the controller / processor 280 of UE 120, and / or Figure 2 Any other component can perform or direct, for example Figure 8 The process 800 Figure 9 The operation of process 900 and / or other processes as described herein. Memory 242 and 282 may store data and program code 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 by one or more processors of base station 110 and / or UE 120 (e.g., directly, or after compilation, translation, interpretation, etc.), may cause one or more processors, UE 120 and / or base station 110 to perform or direct, for example... Figure 8 The process 800 Figure 9 The operation of process 900 and / or other processes as described herein. In some aspects, execution instructions may include run instructions, translation instructions, compilation instructions, interpretation instructions, etc.

[0048] In some aspects, UEs (e.g., UE 120 and / or Figure 10 The apparatus 1000 may include: a unit for receiving from a base station resource grant for at least one sidelink channel, wherein the resource grant indicates a first uplink resource for transmitting a sidelink transmission acknowledgment message and a second uplink resource for transmitting a listen-before-speak state; and / or a unit for transmitting to the base station on the second uplink resource an indication of at least one state associated with a listen-before-speak procedure used on at least one sidelink channel. Units for the UE to perform the operations described herein may include, for example, an antenna 252, a demodulator 254, a MIMO detector 256, a receive processor 258, a transmit processor 264, a TX MIMO processor 266, a modulator 254, a controller / processor 280, and / or a memory 282.

[0049] In some aspects, the UE may further include: a unit for avoiding sending a sidelink transmission acknowledgment message on a first uplink resource when at least one state associated with the listen-before-speak procedure includes an LBT failure state. In some aspects, the UE may further include: a unit for receiving from a base station an indication of an offset of a first symbol from which data is transmitted on at least one sidelink channel. Alternatively or additionally, the UE may further include: a unit for receiving from a base station an indication of a semi-static codebook to be reported for the first uplink resource and the second uplink resource. Therefore, in some aspects, the UE may include: a unit for transmitting a concatenation of a semi-static codebook for the LBT state and a semi-static codebook for sidelink transmission acknowledgment for both the first and second uplink resources. Alternatively or additionally, the UE may include: a unit for transmitting an indication of at least one state associated with the listen-before-speak procedure in the second uplink resource without multiplexing the semi-static codebook for sidelink transmission acknowledgment and the semi-static codebook for the LBT state. Alternatively, the UE may include a unit for sending an acknowledgment message in a first uplink resource without multiplexing it with a semi-static codebook for sidelink transmission acknowledgment and a semi-static codebook for LBT state.

[0050] In some aspects, base stations (e.g., base station 110 and / or Figure 11The apparatus 1100 may include: a unit for sending resource granting to the UE for at least one sidelink channel, wherein the resource granting indicates a first uplink resource for sending a sidelink transmission acknowledgment message and a second uplink resource for sending a listen-before-talk state; and / or a unit for receiving from the UE on the second uplink resource an indication of at least one state associated with a listen-before-talk process used on at least one sidelink channel. Units for the base station to perform the operations described herein may include, for example, a transmit processor 220, a TX MIMO processor 230, a modulator 232, an antenna 234, a demodulator 232, a MIMO detector 236, a receive processor 238, a controller / processor 240, a memory 242, and / or a scheduler 246.

[0051] In some aspects, the base station may further include: a unit for sending to the UE an indication of an offset of a first symbol from which data is transmitted on at least one sidelink channel. Alternatively, the base station may further include: a unit for sending to the UE an indication of a semi-static codebook to be reported for a first uplink resource and a second uplink resource. Therefore, in some aspects, the base station may include: a unit for receiving, for both the first and second uplink resources, a concatenation of a semi-static codebook for LBT state and a semi-static codebook for sidelink transmission acknowledgment. Alternatively, the base station may include: a unit for receiving, in the second uplink resource, an indication of at least one state associated with a listen-before-speak procedure without multiplexing with the semi-static codebook for sidelink transmission acknowledgment and the semi-static codebook for LBT state. Alternatively, the base station may include: a unit for receiving an acknowledgment message in the first uplink resource without multiplexing with the semi-static codebook for sidelink transmission acknowledgment and the semi-static codebook for LBT state.

[0052] Although Figure 2 The boxes in the diagram are shown as different components, but the functions described above with respect to these boxes can be implemented in a single hardware, software, or combined component, or in various combinations of components. For example, the functions described with respect to transmit processor 264, receive processor 258, and / or TX MIMO processor 266 can be performed by or under the control of controller / processor 280.

[0053] As pointed out above, Figure 2 This is provided as an example. Other examples may differ from the one provided. Figure 2 As described.

[0054] Figure 3 This is a diagram illustrating example 300 of sidelink communication according to this disclosure. Figure 3As shown, the first UE 305-1 can communicate with the second UE 305-2 (and one or more other UEs 305) via one or more sidelink channels 310. UEs 305-1 and 305-2 can communicate using one or more sidelink channels 310 for P2P communication, D2D communication, V2X communication (e.g., which may include V2V communication, V2I communication, V2P communication, etc.), mesh networks, etc. In some aspects, UEs 305 (e.g., UEs 305-1 and / or UEs 305-2) can correspond to one or more other UEs described elsewhere herein, such as UE 120. In some aspects, one or more sidelink channels 310 can use a PC5 interface and / or can operate in a high-frequency band (e.g., the 5.9 GHz band). Alternatively or additionally, UEs 305 can use Global Navigation Satellite System (GNSS) timing to synchronize the timing of transmission time intervals (TTIs) (e.g., frames, subframes, time slots, symbols, etc.).

[0055] like Figure 3 As further shown, one or more sidelink channels 310 may include a Physical Side Link Control Channel (PSCCH) 315, a Physical Side Link Shared Channel (PSSCH) 320, and / or a Physical Side Link Feedback Channel (PSFCH) 325. Similar to the Physical Downlink Control Channel (PDCCH) and / or Physical Uplink Control Channel (PUCCH) used for cellular communication with base station 110 via access link or access channel, PSCCH 315 may be used to transmit control information. Similar to the Physical Downlink Shared Channel (PDSCH) and / or Physical Uplink Shared Channel (PUSCH) used for cellular communication with base station 110 via access link or access channel, PSSCH 320 may be used to transmit data. For example, PSCCH 315 can carry sidelink control information (SCI) 330, which can indicate various control information for sidelink communication, such as one or more resources (e.g., time resources, frequency resources, space resources, etc.), wherein transport blocks (TB) 335 can be carried on PSCCH 320. TB 335 can include data. PSCCH 325 can be used to transmit sidelink feedback 340, such as Hybrid Automatic Repeat Request (HARQ) feedback (e.g., ACK / NACK information), transmit power control (TPC), scheduling requests (SR), etc.

[0056] In some aspects, one or more sidelink channels 310 may use resource pools. For example, scheduling assignments may be transmitted in a subchannel using specific resource blocks (RBs) spanning a time period (e.g., included in SCI 330). In some aspects, data transmissions associated with scheduling assignments (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, scheduling assignments and associated data transmissions are not transmitted on adjacent RBs.

[0057] In some aspects, UE 305 may operate using a transmission mode in which resource selection and / or scheduling is performed by UE 305 (e.g., instead of base station 110). In some aspects, UE 305 may perform resource selection and / or scheduling by sensing the availability of the transmission channels. For example, UE 305 may measure Received Signal Strength Indicator (RSSI) parameters (e.g., sidelink RSSI (S-RSSI) parameters) associated with various sidelink channels, may measure Reference Signal Received Power (RSRP) parameters (e.g., PSSCH-RSRP parameters) associated with various sidelink channels, may measure Reference Signal Received Quality (RSRQ) parameters (e.g., PSSCH-RSRQ parameters) associated with various sidelink channels, and so on, and may select the channel for transmission for sidelink communication based at least in part on the measurements.

[0058] Alternatively, UE 305 may use SCI 330 received in PSCCH 315 to perform resource selection and / or scheduling, SCI 330 may indicate occupied resources, channel parameters, etc. Alternatively, UE 305 may perform resource selection and / or scheduling by determining the Channel Busy Rate (CBR) associated with various sidelink channels, CBR may be used for rate control (e.g., by indicating the maximum number of resource blocks that UE 305 can use for a particular set of subframes).

[0059] In a transport mode where resource selection and / or scheduling is performed by UE 305, UE 305 can generate sidelink grants and can send the grants in SCI 330. Sidelink grants can indicate one or more parameters (e.g., transport parameters) for an upcoming sidelink transport, such as one or more resource blocks (e.g., for TB 335) to be used for an upcoming sidelink transport on PSSCH 320, one or more subframes to be used for an upcoming sidelink transport, modulation and coding scheme (MCS) to be used for an upcoming sidelink transport, etc. In some aspects, UE 305 can generate sidelink grants indicating one or more parameters for semi-persistent scheduling (SPS), such as the period of the sidelink transport. Alternatively or concurrently, UE 305 can generate sidelink grants for event-driven scheduling (e.g., for on-demand sidelink messages).

[0060] As pointed out above, Figure 3 This is provided as an example. Other examples may differ from the one provided. Figure 3 As described.

[0061] Figure 4 This is a diagram illustrating example 400 of sidelink communication and access link communication according to various aspects of this disclosure. (See diagram 400 for details.) Figure 4 As shown, the transmitter (Tx) / receiver (Rx) UE 405 and the Rx / Tx UE 410 can communicate with each other via a side link, as described above. Figure 3 As described. Further, in some sidelink modes, base station 110 may communicate with Tx / Rx UE 405 via a first access link. Alternatively, in some sidelink modes, base station 110 may communicate with Rx / Tx UE 410 via a second access link. Tx / Rx UE 405 and / or Rx / Tx UE 410 may correspond to one or more UEs described elsewhere herein, such as... Figure 1 UE 120. Therefore, the direct link between UE 120 (e.g., via the PC5 interface) can be referred to as a sidelink, and the direct link between base station 110 and UE 120 (e.g., via the Uu interface) can be referred to as an access link. Sidelink communication can be transmitted via the sidelink, and access link communication can be transmitted via the access link. Access link communication can be downlink communication (from base station 110 to UE 120) or uplink communication (from UE 120 to base station 110).

[0062] As pointed out above, Figure 4 This is provided as an example. Other examples may differ from the one provided. Figure 4As described.

[0063] Figure 5 This is a diagram illustrating example 500 of an acknowledgment message for a side link channel according to various aspects of this disclosure. Figure 5 As shown, Example 500 includes a UE (e.g., a Tx UE) transmitting data to another UE (e.g., an Rx UE) on at least one side link channel (e.g., as combined above). Figure 3 and 4 (As described).

[0064] In some aspects, the base station can transmit and the Tx UE can receive resource grants for at least one sidelink channel. For example, such as Figure 5 As shown, resource granting may include downlink control information (DCI), such as format 3_0DCI (e.g., as defined in 3GPP specifications and / or other standards). Resource granting may indicate one or more time resources (e.g., one or more symbols spanning one or more time slots within one or more frames) for the Tx UE to use on at least one side link channel. Alternatively or additionally, resource granting may indicate one or more frequency resources (e.g., one or more component carriers (CCs) to be used on one or more subbands within one or more bandwidth portions (BWPs)).

[0065] like Figure 5 As further illustrated, resource granting can indicate uplink resources (e.g., resources on the PUCCH) enabling the Tx UE to report acknowledgment messages (e.g., ACK / NACK feedback and / or other HARQ feedback) received from the Rx UE (e.g., on the PSFCH, as shown in Example 500). In some aspects, the Tx UE can copy the acknowledgment message received on the PSFCH to the PUCCH that provides the resource granting indication. In one example, when the Tx UE unicasts data (e.g., only to the Rx UE), the Tx UE can copy the acknowledgment message received on the PSFCH to the PUCCH and send a NACK feedback on the PUCCH if nothing is received on the PSFCH. In another example, when the Tx UE multicasts data (e.g., to a UE group including the Rx UE), the Tx UE can send an ACK feedback on the PUCCH if an ACK message is received from the UE group on all PSFCHs, otherwise send a NACK feedback. In yet another example, when the Tx UE performs a region-based transport (e.g., to the geographic region where the Rx UE is located), the Tx UE can send a NACK feedback on the PUCCH if a NACK message is received on any PSFCH, otherwise it can send an ACK feedback.

[0066] In some aspects, the Tx UE may use the LBT procedure on at least one sidelink channel. For example, the Tx UE may wait for one or more symbols of a time slot and only transmit within that time slot (e.g., to the Rx UE) if the Tx UE has not decoded any transmissions in those one or more symbols. In some aspects, the Tx UE may use the LBT procedure, at least in part because at least one sidelink channel is on an unlicensed frequency band channel. For example, at least one sidelink channel may use NR unlicensed (NR-U) spectrum.

[0067] Typically, the physical layer of a Tx UE can report LBT states (e.g., pass or fail) to the upper layer of the Tx UE (e.g., the Media Access Control (MAC) layer). The upper layer will filter and average the LBT states and report them to the base station (e.g., using a MAC control element (MAC-CE)). However, this results in a delay between the Tx UE detecting the LBT states and reporting them to the base station. Furthermore, the Tx UE consumes additional processing resources by filtering and averaging the LBT states, even if this results in the base station receiving less accurate information about which subbands on at least one sidelink channel should be reallocated.

[0068] Some of the techniques and apparatus described herein allow UEs (e.g., UE 120 and / or UE 405) to report at least one state associated with the LBT process using an uplink channel (e.g., PUCCH) configured by a base station (e.g., base station 110). Therefore, UE 405 can report the LBT state to base station 110 with reduced latency, while simultaneously conserving processing resources. Additionally, base station 110 can receive more accurate LBT states from UE 405. Consequently, base station 110 can more efficiently reallocate subbands on one or more sidelink channels, thus improving the quality and reliability of communication on these sidelink channels.

[0069] As pointed out above, Figure 5 This is provided as an example. Other examples may differ from the one provided. Figure 5 As described.

[0070] Figure 6 This is a diagram illustrating an example 600 associated with an LBT report for a sidelink channel according to various aspects of this disclosure. In some aspects, a base station (e.g., base station 110) can transmit and a UE (e.g., UE 405) can receive resource grants for at least one sidelink channel (e.g., as described above in conjunction with...). Figure 3 and 4(As described). Therefore, UE405 can communicate with one or more additional UEs (e.g., UE 410) on at least one side link channel. In some aspects, resource granting may include DCI, such as Format 3_0 DCI (e.g., as defined in 3GPP specifications and / or other standards).

[0071] like Figure 6 As shown, resource granting can indicate a first uplink resource for sending a sidelink transmission acknowledgment message. For example, resource granting can indicate a first uplink resource (e.g., a first resource on the PUCCH) such that UE405 can report acknowledgment messages (e.g., ACK / NACK feedback and / or other HARQ feedback) received from UE410 (e.g., on the PSFCH, as shown in Example 600).

[0072] In some respects, UE 405 may use the LBT procedure on at least one sidelink channel. For example, UE 405 may use the LBT procedure, at least in part because at least one sidelink channel is on an unlicensed frequency band channel. Therefore, as Figure 6 As further shown, resource granting can also indicate a second uplink resource for transmitting LBT status. For example, resource granting can indicate a second uplink resource (e.g., a second resource on the PUCCH) such that UE 405 can report the LBT status associated with at least one sidelink channel earlier than the reporting acknowledgment message (e.g., as described above).

[0073] like Figure 6 As further shown, UE 405 can transmit an indication of at least one state associated with an LBT procedure used on at least one sidelink channel on a second uplink resource (e.g., on an earlier PUCCH resource), and base station 110 can receive an indication of at least one state associated with an LBT procedure used on at least one sidelink channel on a second uplink resource (e.g., on an earlier PUCCH resource). Therefore, as described below... Figure 7 The description indicates that the indication of at least one state may include at least one bit.

[0074] By using combination Figure 6According to the described technique, UE 405 can use an uplink channel (e.g., PUCCH) configured by base station 110 to report at least one state associated with the LBT process. Therefore, UE 405 can report the LBT state to base station 110 with reduced latency and simultaneously save processing resources. Additionally, base station 110 can receive more accurate LBT states from UE 405. Thus, base station 110 can more efficiently reallocate subbands on at least one sidelink channel, thereby improving the quality and reliability of communication on at least one sidelink channel.

[0075] As pointed out above, Figure 6 This is provided as an example. Other examples may differ from the one provided. Figure 6 As described.

[0076] Figure 7 This is a diagram illustrating example 700 associated with an LBT report used for a side link channel, according to various aspects of this disclosure. Figure 7 As shown, Example 700 includes communication between base station 110 and UE 405. In some aspects, base station 110 and UE 405 may be included in a wireless network (such as wireless network 100). Base station 110 and UE 405 may communicate on a radio access link, which may include an uplink and a downlink.

[0077] like Figure 7 As further shown, Example 700 includes communication between UE 410 and UE 405. In some aspects, UE 410 and UE 405 can communicate on at least one side link channel (e.g., as described above in conjunction with...). Figure 3 and 4 (Described). For example, at least one side link channel may include PSSCH.

[0078] As shown in conjunction with reference numeral 705 in the accompanying drawings, base station 110 can transmit and UE 405 can receive resource grants for at least one sidelink channel (e.g., as described above in conjunction with reference numeral 705). Figure 3 and 4 (Described). Resource grants may indicate one or more time resources (e.g., one or more symbols spanning one or more time slots within one or more frames) for use by UE 405 on at least one side link channel. Alternatively or additionally, resource grants may indicate one or more frequency resources (e.g., one or more CCs to be used on one or more subbands within one or more BWPs). In some aspects, resource grants may include DCIs, such as Format 3_0 DCIs (e.g., as defined in 3GPP specifications and / or other standards).

[0079] In some aspects, resource granting may indicate a first uplink resource for sending a sidelink transmission acknowledgment message. For example, resource granting may indicate an uplink resource (e.g., a first PUCCH resource) such that UE 405 can report acknowledgment messages (e.g., ACK / NACK feedback and / or other HARQ feedback) received from UE 410 (e.g., on the PSFCH).

[0080] In some aspects, the first uplink resource can be configured at least in part based on the first symbol of an expected acknowledgment message (e.g., ACK / NACK feedback and / or other HARQ feedback) received from UE 410 (e.g., on the PSFCH). For example, base station 110 can transmit and UE 405 can receive an indication of an offset from the first symbol of the expected acknowledgment message, and the first uplink resource can be configured at least in part based on that offset. In some aspects, resource granting may include an offset (e.g., a K1 parameter as defined in 3GPP specifications and / or other standards). Alternatively or additionally, base station 110 can transmit and UE 405 can receive a configuration (e.g., a Radio Resource Configuration (RRC) message) including a set of offsets, from which UE 405 and / or base station 110 can select an offset for configuring the first uplink resource.

[0081] In some aspects, UE 405 may use the LBT procedure on at least one side link channel. For example, UE 405 may wait for one or more symbols of a time slot and only transmit within that time slot if UE 405 has not decoded any transmissions in those one or more symbols (e.g., to UE 410). In some aspects, UE 405 may use the LBT procedure, at least in part because at least one side link channel is on an unlicensed frequency band channel. For example, at least one side link channel may use NR-U spectrum.

[0082] Therefore, in some aspects, resource granting can also indicate a second uplink resource for transmitting LBT status. For example, resource granting can indicate a second uplink resource (e.g., a second resource on the PUCCH) such that UE 405 can report the LBT status associated with at least one sidelink channel earlier than the reporting acknowledgment message (e.g., as described above).

[0083] In some aspects, the second uplink resources can be configured at least in part based on a first symbol of data transmission on at least one sidelink channel. For example, base station 110 can transmit and UE 405 can receive an indication of an offset from the first symbol of data transmission on at least one sidelink channel, and the second uplink resources can be configured at least in part based on this offset. In some aspects, resource granting may include an offset (e.g., a K1 parameter as defined in 3GPP specifications and / or other standards). Alternatively or additionally, base station 110 can transmit and UE 405 can receive a configuration (e.g., an RRC message) including a set of offsets, from which UE 405 and / or base station 110 can select an offset for configuring the second uplink resources.

[0084] As shown in conjunction with reference to reference numeral 710, UE 405 can determine at least one state associated with an LBT procedure used on at least one side link channel. For example, at least one state associated with an LBT procedure may include at least one of an LBT pass state or an LBT failure state.

[0085] In some aspects, at least one sidelink channel includes multiple LBT subbands. For example, at least one sidelink channel may include multiple 20MHz (and / or another size) subbands, enabling UE 405 to perform wideband transmission across multiple LBT subbands. Therefore, in some aspects, at least one state may include multiple states corresponding to the multiple LBT subbands. For example, UE 405 may determine a corresponding LBT pass state or LBT failure state for each of the multiple subbands.

[0086] Alternatively, base station 110 may schedule multiple transmissions on at least one side link channel. For example, DCI and / or other resource permissions may allow scheduling of multiple transmissions with the same transport block (TB) size on PSSCH. In some aspects, each of the multiple transmissions may be associated with one or more corresponding LBT results (e.g., one LBT result for each of the multiple subbands used for that transmission). For example, UE 405 may determine a corresponding LBT pass state or LBT failure state for each of the multiple transmissions.

[0087] In any of the foregoing aspects, UE 405 may combine one or more states from a plurality of states (e.g., using an OR operation and / or another logical operation) before sending the indication. For example, if UE 405 determines an LBT pass state for at least one of a plurality of transmissions, UE 405 will send the LBT pass state. In another example, if UE 405 determines an LBT pass state on a subband for at least one of a plurality of transmissions on that subband, UE 405 will send the LBT pass state for that subband.

[0088] In some aspects, when at least one state associated with the LBT procedure includes an LBT failure state, UE 405 may avoid sending a sidelink transmission acknowledgment message on the first uplink resource. For example, base station 110 may receive an indication of an LBT failure state on a second uplink resource and determine not to monitor the first uplink resource for a sidelink transmission acknowledgment message. Similarly, in some aspects, when at least one state associated with the LBT procedure includes an LBT pass state, UE 405 may avoid sending at least one state associated with the LBT procedure on the second uplink resource (e.g., skipping one or more steps described below in conjunction with reference numeral 715). For example, when base station 110 does not receive an indication on the second uplink resource, base station 110 may assume the LBT procedure was successful.

[0089] As shown in conjunction with reference numeral 715, UE 405 may transmit on the second uplink resource an indication of at least one state associated with an LBT procedure used on at least one sidelink channel, and base station 110 may receive on the second uplink resource an indication of at least one state associated with an LBT procedure used on at least one sidelink channel. As described above, the indication may include a single bit or multiple bits (e.g., corresponding to multiple LBT subbands used on at least one sidelink channel).

[0090] In some aspects, base station 110 can transmit, and UE 405 can receive, an indication of a semi-static codebook to be reported for the first uplink resource and the second uplink resource. For example, the semi-static codebook for the first uplink resource may be at least partially based on an offset set for sidelink transmission acknowledgments (e.g., via RRC configuration, as described above). Similarly, the semi-static codebook for the second uplink resource may be at least partially based on an offset set for the LBT state (e.g., via RRC configuration, as described above). Therefore, UE 405 may transmit a concatenation of the semi-static codebook for the LBT state and the semi-static codebook for the sidelink transmission acknowledgments for both the first and second uplink resources.

[0091] In some aspects, base station 110 may include a sidelink assignment index (SAI) in the resource grant. For example, UE 405 may use the SAI to detect any resource grants missed by UE 405 sent by base station 110. Thus, when the SAI meets the condition (e.g., SAI = 1) and UE 405 receives a single resource grant, UE 405 may send an indication of at least one state associated with the LBT process in the second uplink resource without multiplexing it with the semi-static codebook used for sidelink transmission acknowledgments and the semi-static codebook used for LBT states. Alternatively, when the SAI meets the condition (e.g., SAI = 1) and UE 405 receives a single resource grant, UE 405 may send an acknowledgment message in the first uplink resource without multiplexing it with the semi-static codebook used for sidelink transmission acknowledgments and the semi-static codebook used for LBT states.

[0092] Alternatively, base station 110 can transmit, and UE 405 can receive, indicators regarding the application of a dynamic codebook to a first uplink resource and a second uplink resource. For example, UE 405 can consume additional processing power when using a dynamic codebook while saving network overhead by not transmitting across the entire semi-static codebook. In some aspects, resource grants may include a first SAI associated with the first uplink resource and a second SAI associated with the second uplink resource. Therefore, UE 405 can use the SAI to detect any resource grants missed by UE 405 transmitted by base station 110. Furthermore, UE 405 can distinguish between the first and second uplink resources, even when the first uplink resource overlaps with uplink resources used for LBT states on different sidelink channels and / or when the second uplink resource overlaps with uplink resources used for sidelink transmission acknowledgments on different sidelink channels.

[0093] In some aspects, the indication of at least one state associated with the LBT procedure may be associated with a priority equal to the priority of an acknowledgment message on the first uplink resource. If base station 110 is configured with multiplexing rules that allow it to multiplex acknowledgment messages on the first uplink resource with other transmissions to base station 110, UE 405 may use the same multiplexing rules to multiplex at least one state associated with the LBT procedure with other transmissions to base station 110 on the second uplink resource. Alternatively, the indication of at least one state associated with the LBT procedure may be associated with a priority equal to the priority of data on at least one sidelink channel. In some aspects, the priority of the acknowledgment message on the first uplink resource may be at least partially based on the priority of data on at least one sidelink channel, and the priority of the indication of at least one state associated with the LBT procedure may be at least partially based on the priority of the acknowledgment message on the first uplink resource.

[0094] By using combination Figure 7 According to the described technique, UE 405 can use an uplink channel (e.g., PUCCH) configured by base station 110 to report at least one state associated with the LBT process. Therefore, UE 405 can report the LBT state to base station 110 with reduced latency and simultaneously save processing resources. Additionally, base station 110 can receive more accurate LBT states from UE 405. Thus, base station 110 can more efficiently reallocate subbands on at least one sidelink channel, thereby improving the quality and reliability of communication on at least one sidelink channel.

[0095] As pointed out above, Figure 7 This is provided as an example. Other examples may differ from the one provided. Figure 7 As described.

[0096] Figure 8 This is a diagram illustrating, for example, an example process 800 performed by a UE according to various aspects of this disclosure. Example process 800 is wherein a UE (e.g., UE 120, UE 405, and / or...) Figure 10 An example of the device 1000 performing operations associated with LBT reporting for the side link channel.

[0097] like Figure 8 As shown, in some aspects, process 800 may include: receiving resource permission from a base station for at least one sidelink channel (block 810). For example, a UE (e.g., using...) Figure 10The receiving component 1002 depicted can receive resource grants for at least one sidelink channel from the base station, as described above. In some aspects, the resource grants indicate a first uplink resource for transmitting a sidelink transmission acknowledgment message and a second uplink resource for transmitting LBT states.

[0098] like Figure 8 As further shown, in some aspects, process 800 may include: sending an indication to the base station on a second uplink resource of at least one state associated with an LBT process used on at least one sidelink channel (block 820). For example, the UE (e.g., using...) Figure 10 The transmitting component 1004 described herein can transmit to the base station on a second uplink resource an indication of at least one state associated with an LBT process used on at least one sidelink channel, as described above.

[0099] Process 800 may include additional aspects, such as any single aspect or any combination thereof described below and / or in conjunction with one or more other process descriptions elsewhere described herein.

[0100] In the first aspect, resource permission includes DCI.

[0101] In the second aspect, either alone or in combination with the first aspect, at least one side link channel is on an unlicensed frequency band channel.

[0102] In the third aspect, either alone or in combination with one or more of the first and second aspects, the first uplink resource includes a first PUCCH resource, and the second uplink resource includes a second PUCCH resource.

[0103] In the fourth aspect, either alone or in combination with one or more of the first to third aspects, the second uplink resource is configured at least in part based on the first symbol of data transmission on at least one sidelink channel.

[0104] In the fifth aspect, either alone or in combination with one or more of the first to fourth aspects, process 800 further includes: receiving from a base station (e.g., using receiving component 1002) an indication of an offset from a first symbol of data transmission on at least one side link channel, wherein the second uplink resource is configured at least in part based on the offset.

[0105] In the sixth aspect, either alone or in combination with one or more of the first to fifth aspects, at least one state associated with the LBT process includes at least one of the LBT pass state or the LBT failure state.

[0106] In the seventh aspect, either alone or in combination with one or more of the first to sixth aspects, process 800 further includes: avoiding the transmission of a side-link transmission acknowledgment message on the first uplink resource (e.g., using transmission component 1004) when at least one state associated with the LBT process includes an LBT failure state.

[0107] In the eighth aspect, either alone or in combination with one or more of the first to seventh aspects, process 800 includes: receiving from the base station an indication of a semi-static codebook to be reported for the first uplink resource and the second uplink resource.

[0108] In the ninth aspect, either alone or in combination with one or more aspects from the first to the eighth aspects, process 800 further includes: transmitting (e.g., using transmission component 1004) concatenated semi-static codebooks for LBT state and semi-static codebooks for sidelink transmission acknowledgments for both the first uplink resource and the second uplink resource.

[0109] In the tenth aspect, either alone or in combination with one or more of the first to ninth aspects, process 800 further includes: transmitting (e.g., using transmission component 1004) an indication of at least one state associated with the LBT process in a second uplink resource without multiplexing it with a semi-static codebook for sidelink transmission acknowledgment and a semi-static codebook for LBT state, wherein resource grant includes a SAI that meets the conditions, and a single resource grant is received.

[0110] In the eleventh aspect, either alone or in combination with one or more aspects from the first to the tenth aspects, process 800 further includes: transmitting (e.g., using transmission component 1004) an acknowledgment message in a first uplink resource without multiplexing it with a semi-static codebook for sidelink transmission acknowledgment and a semi-static codebook for LBT state, wherein the resource grant includes a conditional SAI and a single resource grant is received.

[0111] In the twelfth aspect, either alone or in combination with one or more of the first to eleventh aspects, the UE receives from the base station (e.g., using receiving component 1002) an indicator regarding the application of a dynamic codebook to a first uplink resource and a second uplink resource, and resource permission includes a first SAI associated with the first uplink resource and a second SAI associated with the second uplink resource.

[0112] In the thirteenth aspect, either alone or in combination with one or more of the first to twelfth aspects, the indication of at least one state associated with the LBT process is associated with the same priority as the acknowledgment message on the first uplink resource.

[0113] In the fourteenth aspect, either alone or in combination with one or more of the first to thirteenth aspects, the indication of at least one state associated with the LBT process is associated with the same priority as the data on at least one side link channel.

[0114] Although Figure 8 An example box of process 800 is shown, but in some aspects, process 800 may include... Figure 8 The boxes depicted in the diagram are compared to additional boxes, fewer boxes, different boxes, or boxes arranged in a different manner. Alternatively, two or more boxes in process 800 may be executed in parallel.

[0115] Figure 9 This is a diagram illustrating, for example, an example process 900 performed by a base station according to various aspects of this disclosure. Example process 900 is wherein a base station (e.g., base station 110 and / or...) Figure 11 An example of the device 1100 performing operations associated with LBT reporting for the side link channel.

[0116] like Figure 9 As shown, in some aspects, process 900 may include: sending data to a UE (e.g., UE 120, UE 405, and / or...). Figure 10 The apparatus 1000 sends a resource grant for at least one side link channel (block 910). For example, the base station (e.g., using...) Figure 11 The transmitting component 1104 described herein can transmit resource grants to the UE for at least one sidelink channel, as described above. In some aspects, the resource grants indicate a first uplink resource for transmitting a sidelink transmission acknowledgment message and a second uplink resource for transmitting LBT states.

[0117] like Figure 9 As further shown, in some aspects, process 900 may include: receiving from the UE on a second uplink resource an indication of at least one state associated with an LBT process used on at least one sidelink channel (block 920). For example, a base station (e.g., using...) Figure 11 The receiving component 1102 described herein can receive from the UE on a second uplink resource an indication of at least one state associated with an LBT procedure used on at least one sidelink channel, as described above.

[0118] Process 900 may include additional aspects, such as any single aspect or any combination thereof described below and / or in conjunction with one or more other process descriptions elsewhere described herein.

[0119] In the first aspect, resource permission includes DCI.

[0120] In the second aspect, either alone or in combination with the first aspect, at least one side link channel is on an unlicensed frequency band channel.

[0121] In the third aspect, either alone or in combination with one or more of the first and second aspects, the first uplink resource includes a first PUCCH resource, and the second uplink resource includes a second PUCCH resource.

[0122] In the fourth aspect, either alone or in combination with one or more of the first to third aspects, the second uplink resource is configured at least in part based on the first symbol of data transmission on at least one sidelink channel.

[0123] In the fifth aspect, either alone or in combination with one or more of the first to fourth aspects, process 900 further includes: sending to the UE (e.g., using transmission component 1104) an indication of an offset from a first symbol of data transmission on at least one side link channel, wherein the second uplink resource is configured at least in part based on the offset.

[0124] In the sixth aspect, either alone or in combination with one or more of the first to fifth aspects, at least one state associated with the LBT process includes at least one of the LBT pass state or the LBT failure state.

[0125] In the seventh aspect, either alone or in combination with one or more of the first to sixth aspects, process 900 further includes: sending to the UE (e.g., using transmission component 1104) an indication of a semi-static codebook to be reported for the first uplink resource and the second uplink resource.

[0126] In the eighth aspect, either alone or in combination with one or more aspects from the first to the seventh aspects, process 900 further includes: receiving (e.g., using receiving component 1102) concatenated semi-static codebooks for LBT state and semi-static codebooks for sidelink transmission acknowledgments for both the first uplink resource and the second uplink resource.

[0127] In the ninth aspect, either alone or in combination with one or more of the first to eighth aspects, process 900 further includes receiving (e.g., using receiving component 1102) an indication of at least one state associated with the LBT process in a second uplink resource without multiplexing it with a semi-static codebook for sidelink transmission acknowledgment and a semi-static codebook for LBT state, wherein resource grant includes a condition-satisfied SAI, and a single resource grant is transmitted.

[0128] In the tenth aspect, either alone or in combination with one or more aspects from the first to the ninth aspects, process 900 further includes: receiving (e.g., using receiving component 1102) an acknowledgment message in a first uplink resource without multiplexing it with a semi-static codebook for sidelink transmission acknowledgment and a semi-static codebook for LBT state, wherein the resource grant includes a conditional SAI and a single resource grant is sent.

[0129] In the eleventh aspect, either alone or in combination with one or more of the first to tenth aspects, the base station transmits (e.g., using transmission component 1104) an indicator from the base station regarding the application of the dynamic codebook to the first uplink resource and the second uplink resource, and the resource permission includes a first SAI associated with the first uplink resource and a second SAI associated with the second uplink resource.

[0130] In the twelfth aspect, either alone or in combination with one or more of the first to eleventh aspects, the indication of at least one state associated with the LBT process is associated with a priority that is the same as the priority of the acknowledgment message on the first uplink resource.

[0131] In the thirteenth aspect, either alone or in combination with one or more of the first to twelfth aspects, the indication of at least one state associated with the LBT process is associated with the same priority as the data on at least one side link channel.

[0132] Although Figure 9 An example box of process 900 is shown, but in some aspects, process 900 may include... Figure 9 The boxes depicted in the diagram are compared to additional boxes, fewer boxes, different boxes, or boxes arranged in a different manner. Alternatively, two or more boxes in process 900 may be executed in parallel.

[0133] Figure 10 This is a block diagram of an example device 1000 for wireless communication. Device 1000 may be a UE, or a UE may include device 1000. In some aspects, device 1000 includes a receiving component 1002 and a transmitting component 1004, which can communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, device 1000 can use the receiving component 1002 and the transmitting component 1004 to communicate with another device 1006 (such as a UE, a base station, or another wireless communication device). As further shown, device 1000 may include a determining component 1008, etc.

[0134] In some respects, device 1000 can be configured to perform the functions described herein. Figure 6-7 One or more operations described herein. Alternatively or concurrently, the device 1000 may be configured to perform one or more processes described herein, such as... Figure 8 The process 800 or a combination thereof. In some aspects, the device 1000 and / or Figure 10 One or more components shown may include the above-mentioned components. Figure 2 One or more components of the UE as described. Alternatively or in addition, Figure 10 One or more components shown can be combined with the above. Figure 2 The description refers to implementation within one or more components. Alternatively, one or more components in the set of components may be implemented, at least partially, as software stored in memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the function or operation of the component.

[0135] Receiver 1002 may receive communications from device 1006, such as reference signals, control information, data communications, or combinations thereof. Receiver 1002 may provide the received communications to one or more other components of device 1000. In some aspects, receiver 1002 may perform signal processing on the received communications (e.g., filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, etc.) and may provide the processed signal to one or more other components of device 1006. In some aspects, receiver 1002 may include the elements described above. Figure 2 The described UE includes one or more antennas, demodulators, MIMO detectors, receiver processors, controllers / processors, memory, or combinations thereof.

[0136] Transmitting component 1004 can transmit communications, such as reference signals, control information, data communications, or combinations thereof, to device 1006. In some aspects, one or more other components of device 1006 can generate communications and provide the generated communications to transmitting component 1004 for transmission to device 1006. In some aspects, transmitting component 1004 can perform signal processing (e.g., filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, etc.) on the generated communications and can transmit the processed signals to device 1006. In some aspects, transmitting component 1004 may include the combinations described above. Figure 2 The described UE includes one or more antennas, modulators, transmit MIMO processors, transmit processors, controllers / processors, memory, or combinations thereof. In some aspects, the transmit component 1004 may be co-located with the receive component 1002 in a transceiver.

[0137] In some aspects, receiving component 1002 may receive resource grants for at least one sidelink channel from device 1006. In some aspects, the resource grants indicate a first uplink resource for transmitting a sidelink transmission acknowledgment message and a second uplink resource for transmitting LBT status. Therefore, transmitting component 1004 may transmit to device 1006 on the second uplink resource an indication of at least one status associated with an LBT procedure used on at least one sidelink channel. For example, determining component 1008 may determine at least one status associated with an LBT procedure used on at least one sidelink channel. In some aspects, determining component 1008 may include the above-described combination of... Figure 2 The described UE includes one or more antennas, demodulators, MIMO detectors, receive processors, modulators, transmit MIMO processors, transmit processors, controllers / processors, memory, or combinations thereof.

[0138] In some aspects, the receiving component 1002 may also receive from the device 1006 an indication of the offset of a first symbol for data transmission on at least one side link channel. Therefore, the second uplink resources can be configured at least in part based on the offset.

[0139] In some aspects, when at least one state associated with the LBT process includes an LBT failure state, the transmitting component 1004 can avoid sending a sidelink transmission acknowledgment message on the first uplink resource.

[0140] In some aspects, receiving component 1002 may also receive from device 1006 an indication of a semi-static codebook to be reported for the first uplink resource and the second uplink resource. Therefore, transmitting component 1004 may transmit a concatenation of a semi-static codebook for LBT status and a semi-static codebook for lateral downlink transmission acknowledgments for both the first and second uplink resources.

[0141] In some aspects, when resource granting includes a conditional SAI and a single resource grant is received, the transmitting component 1004 can transmit an indication of at least one state associated with the LBT process in a second uplink resource without multiplexing the semi-static codebook used for sidelink transmission acknowledgment and the semi-static codebook used for LBT status. Alternatively, when resource granting includes a conditional SAI and a single resource grant is received, the transmitting component 1004 can transmit an acknowledgment message in a first uplink resource without multiplexing the semi-static codebook used for sidelink transmission acknowledgment and the semi-static codebook used for LBT status.

[0142] Figure 10 The number and arrangement of components shown are provided as an example. In reality, they can exist in combination with... Figure 10 The components shown are compared to additional components, fewer components, different components, or components arranged in a different way. Furthermore, Figure 10 The two or more components shown can be implemented within a single component, or Figure 10 The single component shown can be implemented as multiple distributed components. Alternatively, Figure 10 The set (one or more) components shown can perform actions described by Figure 10 The other set of components shown performs one or more functions.

[0143] Figure 11 This is a block diagram of an example device 1100 for wireless communication. Device 1100 may be a base station, or a base station may include device 1100. In some aspects, device 1100 includes a receiving component 1102 and a transmitting component 1104, which can communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, device 1100 can use the receiving component 1102 and the transmitting component 1104 to communicate with another device 1106 (such as a UE, a base station, or another wireless communication device). As further shown, device 1100 may include a reallocation component 1108, etc.

[0144] In some respects, device 1100 can be configured to perform the functions described herein. Figure 6-7 One or more operations described herein. Alternatively or concurrently, device 1100 may be configured to perform one or more processes described herein, such as... Figure 9 Process 900 or a combination thereof. In some aspects, device 1100 and / or Figure 11 One or more components shown may include the above-mentioned components. Figure 2 One or more components of the described base station. Alternatively, Figure 11 One or more components shown can be combined with the above. Figure 2 The description refers to implementation within one or more components. Alternatively, one or more components in the set of components may be implemented, at least partially, as software stored in memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the function or operation of the component.

[0145] Receiver 1102 may receive communications from device 1106, such as reference signals, control information, data communications, or combinations thereof. Receiver 1102 may provide the received communications to one or more other components of device 1100. In some aspects, receiver 1102 may perform signal processing on the received communications (e.g., filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, etc.) and may provide the processed signal to one or more other components of device 1106. In some aspects, receiver 1102 may include the elements described above. Figure 2 The described base station includes one or more antennas, demodulators, MIMO detectors, receiver processors, controllers / processors, memory, or combinations thereof.

[0146] Transmitting component 1104 can transmit communications, such as reference signals, control information, data communications, or combinations thereof, to device 1106. In some aspects, one or more other components of device 1106 can generate communications and provide the generated communications to transmitting component 1104 for transmission to device 1106. In some aspects, transmitting component 1106 can perform signal processing (e.g., filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, etc.) on the generated communications and can transmit the processed signals to device 1106. In some aspects, transmitting component 1104 may include the above-described combinations. Figure 2 The described base station includes one or more antennas, a modulator, a transmit MIMO processor, a transmit processor, a controller / processor, a memory, or a combination thereof. In some aspects, the transmit component 1104 may be co-located with the receive component 1102 in a transceiver.

[0147] In some aspects, transmitting component 1104 may transmit resource grants for at least one sidelink channel to device 1106. In some aspects, the resource grants indicate a first uplink resource for transmitting a sidelink transmission acknowledgment message and a second uplink resource for transmitting LBT status. Therefore, receiving component 1102 may receive from device 1106 on the second uplink resource an indication of at least one status associated with an LBT procedure used on at least one sidelink channel. In some aspects, reallocation component 1108 may reallocate one or more subbands to / from at least one sidelink channel based at least in part on the indications. For example, reallocation component 1108 may encode new resource grants for at least one sidelink channel, and transmitting component 1104 may transmit the new resource grants to device 1106. In some aspects, reallocation component 1108 may include the above-described combination of... Figure 2 The described base station includes a modulator, a transmit MIMO processor, a transmit processor, a controller / processor, a memory, or a combination thereof.

[0148] In some aspects, the transmitting component 1104 may also transmit to the device 1106 an indication of the offset of a first symbol for data transmission on at least one side link channel, and may configure the second uplink resources at least in part based on the offset.

[0149] In some aspects, the transmitting component 1104 may also transmit to the device 1106 an indication of a semi-static codebook to be reported for the first uplink resource and the second uplink resource. Therefore, the receiving component 1102 may receive a concatenation of a semi-static codebook for LBT status and a semi-static codebook for sidelink transmission acknowledgments for both the first and second uplink resources.

[0150] In some aspects, when resource granting includes a conditional SAI and a single resource grant is sent, receiving component 1102 can receive an indication of at least one state associated with the LBT process in a second uplink resource without multiplexing it with a semi-static codebook for sidelink transmission acknowledgment and a semi-static codebook for LBT status. Alternatively, when resource granting includes a conditional SAI and a single resource grant is sent, receiving component 1102 can receive an acknowledgment message in a first uplink resource without multiplexing it with a semi-static codebook for sidelink transmission acknowledgment and a semi-static codebook for LBT status.

[0151] Figure 11 The number and arrangement of components shown are provided as an example. In reality, they can exist in combination with... Figure 11 The components shown are compared to additional components, fewer components, different components, or components arranged in a different way. Furthermore, Figure 11 The two or more components shown can be implemented within a single component, or Figure 11 The single component shown can be implemented as multiple distributed components. Alternatively, Figure 11 The set (one or more) components shown can perform actions described by Figure 11 The other set of components shown performs one or more functions.

[0152] The foregoing disclosure provides explanations and descriptions, but is not intended to be exhaustive or to limit the aspects to the precise form disclosed. Modifications and variations can be made based on the foregoing disclosure, or from practice in the aspects.

[0153] As used herein, the term "component" is intended to be interpreted broadly as hardware, firmware, and / or a combination of hardware and software. As used herein, a "processor" is implemented using hardware, firmware, and / or a combination of hardware and software. It will be apparent that the systems and / or methods described herein can be implemented using various forms of hardware, firmware, and / or combinations of hardware and software. The actual specialized control hardware or software code used to implement these systems and / or methods is not a limitation on any aspect. Therefore, while the operation and behavior of the systems and / or methods are described herein without reference to specific software code, it is to be understood that the software and hardware can be designed to implement the systems and / or methods, at least in part, based on the descriptions herein.

[0154] As used in this article, depending on the context, satisfying the threshold can refer to a value greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, etc.

[0155] Even if a specific combination of features is recited in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of the aspects. In fact, many of these features can be combined in ways that are not specifically recited in the claims and / or specifically disclosed in the specification. While each dependent claim listed below may depend directly on only one claim, the disclosure of the aspects includes combinations of each dependent claim with every other claim in the claim set. The phrase “at least one of” in the list of items refers to any combination of those 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 of multiples of the same element (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other ordering of a, b, and c).

[0156] Elements, actions, or instructions used herein should not be construed as critical or necessary unless explicitly stated otherwise. Furthermore, as used herein, the articles “a” and “an” are intended to include one or more items and may be used interchangeably with “one or more.” Furthermore, as used herein, the article “the” is intended to include one or more items mentioned in conjunction with the article “the” and may be used interchangeably with “the one or more.” Furthermore, as used herein, the terms “set” and “group” are intended to include one or more items (e.g., related items, unrelated items, combinations of related and unrelated items, etc.) and are used interchangeably with “one or more.” The phrase “only one” or similar language is used where only one item is expected. Furthermore, as used herein, the terms “has,” “have,” “having,” etc., are intended to be open-ended terms. Furthermore, unless explicitly stated otherwise, the phrase “based on” is intended to mean “at least partially based on.” Furthermore, as used herein, the term “or” is intended to be inclusive when used in a series and may be used interchangeably with “and / or” unless otherwise expressly stated (e.g., if used in combination with “any” or “only one”).

Claims

1. A method for wireless communication performed by a user equipment (UE), comprising: Receives resource grants from a base station for at least one sidelink channel, wherein the resource grants for the at least one sidelink channel indicate first uplink resources for sending a sidelink transmission acknowledgment message and second uplink resources for sending a listen-before-speak state, wherein the second uplink resources are earlier in time than the first uplink resources; and On the second uplink resource, an indication is sent to the base station of at least one state associated with the listen-before-speak procedure used on the at least one sidelink channel.

2. The method according to claim 1, wherein, The resource granting includes downlink control information (DCI).

3. The method according to claim 1, wherein, The at least one side link channel is on an unlicensed frequency band channel.

4. The method according to claim 1, wherein, The first uplink resource includes a first physical uplink control channel (PUCCH) resource, and the second uplink resource includes a second PUCCH resource.

5. The method according to claim 1, wherein, The second uplink resource is configured at least in part based on the first symbol of data transmission on the at least one sidelink channel.

6. The method according to claim 1, further comprising: Receive from the base station an indication of the offset of the first symbol from the data transmission on the at least one side link channel. The second uplink resource is configured at least in part based on the offset.

7. The method according to claim 1, wherein, The at least one state associated with the Listen Before Talk (LBT) process includes at least one of an LBT pass state or an LBT failure state.

8. The method according to claim 1, further comprising: When at least one state associated with the Listen-then-Speak process includes an LBT failure state, avoid sending a sidelink transmission acknowledgment message on the first uplink resource.

9. The method according to claim 1, further comprising: The base station receives an instruction for a semi-static codebook to be reported for the first uplink resource and the second uplink resource.

10. The method of claim 9, further comprising: For both the first uplink resource and the second uplink resource, a semi-static codebook for the Listen-Before-Speak (LBT) state and a semi-static codebook for the sidelink transmission acknowledgment are concatenated.

11. The method of claim 9, further comprising: Without multiplexing with the semi-static codebook used for sidelink transmission acknowledgments and the semi-static codebook used for LBT states, the indication of the at least one state associated with the listen-before-speak process is transmitted in the second uplink resource. The resource grant includes a sidelink assignment index (SAI) that meets the conditions, and a single resource grant is received.

12. The method according to claim 9, further comprising: An acknowledgment message is sent in the first uplink resource without multiplexing it with the semi-static codebook used for sidelink transmission acknowledgments and the semi-static codebook used for LBT states. The resource grant includes a sidelink assignment index (SAI) that meets the conditions, and a single resource grant is received.

13. The method according to claim 1, wherein, The UE receives from the base station an indicator regarding the application of a dynamic codebook to the first uplink resource and the second uplink resource, wherein the resource permission includes a first sidelink assignment index (SAI) associated with the first uplink resource and a second SAI associated with the second uplink resource.

14. The method according to claim 1, wherein, The indication of at least one state associated with the listen-before-speak process is associated with the same priority as the acknowledgment message on the first uplink resource.

15. The method according to claim 1, wherein, The indication of at least one state associated with the listen-before-speak process is associated with the same priority as the data on the at least one side link channel.

16. A method for wireless communication performed by a base station, comprising: Sending resource grants to a user equipment (UE) for at least one sidelink channel, wherein the resource grants for the at least one sidelink channel indicate a first uplink resource for sending a sidelink transmission acknowledgment message and a second uplink resource for sending a listen-before-speak state, wherein the second uplink resource is earlier in time than the first uplink resource; and On the second uplink resource, the UE receives an indication of at least one state associated with the listen-before-speak procedure used on the at least one sidelink channel.

17. The method according to claim 16, wherein, The at least one side link channel is on an unlicensed frequency band channel.

18. The method according to claim 16, wherein, The first uplink resource includes a first physical uplink control channel (PUCCH) resource, and the second uplink resource includes a second PUCCH resource.

19. The method of claim 16, wherein, The second uplink resource is configured at least in part based on the first symbol of data transmission on the at least one sidelink channel.

20. The method of claim 16, further comprising: Send to the UE an indication of the offset of the first symbol from the data transmission on the at least one side link channel. The second uplink resource is configured at least in part based on the offset.

21. The method according to claim 16, wherein, The at least one state associated with the Listen Before Talk (LBT) process includes at least one of an LBT pass state or an LBT failure state.

22. The method of claim 16, further comprising: Send an instruction to the UE for a semi-static codebook to be reported for the first uplink resource and the second uplink resource.

23. The method of claim 22, further comprising: The first uplink resource and the second uplink resource receive a concatenation of a semi-static codebook for the Listen-Before-Speak (LBT) state and a semi-static codebook for the sidelink transmission acknowledgment.

24. The method of claim 22, further comprising: Without multiplexing with the semi-static codebook used for sidelink transmission acknowledgments and the semi-static codebook used for LBT states, the indication of the at least one state associated with the listen-before-speak process is received in the second uplink resource. The resource grant includes a sidelink assignment index (SAI) that meets the conditions, and a single resource grant is sent.

25. The method of claim 22, further comprising: Without multiplexing it with the semi-static codebook used for sidelink transmission acknowledgments and the semi-static codebook used for LBT states, the acknowledgment message is received in the first uplink resource. The resource grant includes a sidelink assignment index (SAI) that meets the conditions, and a single resource grant is sent.

26. The method of claim 16, wherein, The base station sends an indicator from the base station regarding the application of a dynamic codebook to the first uplink resource and the second uplink resource, wherein the resource permission includes a first sidelink assignment index (SAI) associated with the first uplink resource and a second SAI associated with the second uplink resource.

27. The method according to claim 16, wherein, The indication of at least one state associated with the listen-before-speak process is associated with the same priority as the acknowledgment message on the first uplink resource.

28. The method according to claim 16, wherein, The indication of at least one state associated with the listen-before-speak process is associated with the same priority as the data on the at least one side link channel.

29. A user equipment for wireless communication, comprising: Memory; as well as One or more processors are operatively coupled to the memory, and the memory and the one or more processors are configured to: Receives resource grants from a base station for at least one sidelink channel, wherein the resource grants for the at least one sidelink channel indicate first uplink resources for sending a sidelink transmission acknowledgment message and second uplink resources for sending a listen-before-speak state, wherein the second uplink resources are earlier in time than the first uplink resources; and On the second uplink resource, an indication is sent to the base station of at least one state associated with the listen-before-speak procedure used on the at least one sidelink channel.

30. A base station for wireless communication, comprising: Memory; as well as One or more processors are operatively coupled to the memory, and the memory and the one or more processors are configured to: Sending resource grants to a user equipment (UE) for at least one sidelink channel, wherein the resource grants for the at least one sidelink channel indicate a first uplink resource for sending a sidelink transmission acknowledgment message and a second uplink resource for sending a listen-before-speak state, wherein the second uplink resource is earlier in time than the first uplink resource; and On the second uplink resource, the UE receives an indication of at least one state associated with the listen-before-speak procedure used on the at least one sidelink channel.

Images