Contention window adjustment for sidelink communications

Abstract

Aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment (UE) may transmit a first sidelink transmission starting at a second start symbol candidate during a channel occupancy time (COT) on a sidelink, the second start symbol candidate occurring after the first start symbol candidate occurring at a start of a first slot in the COT. The UE may transmit a second sidelink transmission during the COT on the sidelink that spans a duration of a second time slot in the COT that occurs after the first time slot. The UE may determine a contention window adjustment based at least in part on hybrid automatic repeat request (HARQ) feedback received for the second time slot. Numerous other aspects are described.

Description

Technical Field

[0001] All aspects of this disclosure relate to wireless communication in general, and to techniques and apparatus for contention window adjustment for sidelink communication. Background Technology

[0002] 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 enable communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access technologies include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single Carrier Frequency Division Multiple Access (SC-FDMA) systems, Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE / LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard issued by the 3rd Generation Partnership Project (3GPP).

[0003] A wireless network may include one or more network nodes that support communication for wireless communication devices, such as user equipment (UE) or multiple UEs. UEs may communicate with network nodes via downlink and uplink communication. A "downlink" (or "DL") refers to the communication link from the network node to the UE, and an "uplink" (or "UL") refers to the communication link from the UE to the network node. Some wireless networks may support device-to-device communication, such as via local links (e.g., sidelinks (SL), wireless local area network (WLAN) links, and / or wireless personal area network (WPAN) links, etc.).

[0004] The aforementioned multiple access technologies have been adopted in various telecommunications standards to provide a common protocol that enables different UEs to communicate at the city, country, region, and / or global levels. New Radio (NR) (which may be referred to as 5G) is a set of enhancements to the LTE mobile standard issued by 3GPP. NR is designed to better support mobile broadband internet access by: improving spectrum efficiency; reducing costs; improving service; utilizing new spectrum; and better integrating with other open standards by using Orthogonal Frequency Division Multiplexing (OFDM) with Cyclic Prefix (CP) on the downlink (CP-OFDM), and CP-OFDM and / or Single Carrier Frequency Division Multiplexing (SC-FDM) (also known as Discrete Fourier Transform Extended OFDM (DFT-s-OFDM)) on the uplink; and supporting beamforming, Multiple-Input Multiple-Output (MIMO) antenna technologies and carrier aggregation. Further improvements to LTE, NR, and other radio access technologies remain useful as the demand for mobile broadband access continues to increase. Summary of the Invention

[0005] Some aspects described herein relate to a method for wireless communication performed by a User Equipment (UE). The method may include transmitting a first sidelink transmission during the Channel Occupied Time (COT) on a sidelink, beginning at a second start symbol candidate that appears after a first start symbol candidate that appears at the beginning of a first time slot in the COT. The method may include transmitting a second sidelink transmission during the COT on the sidelink, the second sidelink transmission spanning the duration of a second time slot that appears after the first time slot in the COT. The method may include determining a contention window adjustment based at least in part on Hybrid Automatic Repeat Request (HARQ) feedback received for the second time slot.

[0006] Some aspects described herein relate to a method for wireless communication performed by a UE. The method may include transmitting a first sidelink transmission during a COT on a sidelink, beginning at a second start symbol candidate that appears after a first start symbol candidate appearing at the beginning of a first time slot in the COT. The method may include transmitting a second sidelink transmission during the COT on the sidelink, the second sidelink transmission spanning the duration of a second time slot appearing after the first time slot in the COT. The method may include determining a contention window adjustment based at least in part on a first HARQ feedback received for the first time slot or a second HARQ feedback received for the second time slot.

[0007] Some aspects described herein relate to a method for wireless communication performed by a UE. The method may include transmitting a first sidelink transmission during a COT on a sidelink, beginning at a second start symbol candidate that appears after a first start symbol candidate appearing at the beginning of a first time slot in the COT. The method may include transmitting a second sidelink transmission during the COT on the sidelink, the second sidelink transmission spanning the duration of a second time slot appearing after the first time slot in the COT. The method may include determining a contention window adjustment based at least in part on a first HARQ feedback received for the first time slot and a second HARQ feedback received for the second time slot.

[0008] Some aspects described herein relate to a UE for wireless communication. The user equipment may include a memory and one or more processors coupled to the memory. The one or more processors may be configured to transmit a first sidelink transmission during a COT on a sidelink, beginning at a second start symbol candidate that appears after a first start symbol candidate appearing at the beginning of a first time slot in the COT. The one or more processors may be configured to transmit a second sidelink transmission during the COT on a sidelink, the second sidelink transmission spanning the duration of a second time slot appearing after the first time slot in the COT. The one or more processors may be configured to determine a contention window adjustment based at least in part on HARQ feedback received for the second time slot.

[0009] Some aspects described herein relate to a UE for wireless communication. The UE may include a memory and one or more processors coupled to the memory. The one or more processors may be configured to transmit a first sidelink transmission during a Co-op (COT) on a sidelink, beginning at a second start symbol candidate that appears after a first start symbol candidate appearing at the beginning of a first time slot in the COT. The one or more processors may be configured to transmit a second sidelink transmission during the COT on a sidelink, the second sidelink transmission spanning the duration of a second time slot appearing after the first time slot in the COT. The one or more processors may be configured to determine a contention window adjustment based at least in part on a first HARQ feedback received for the first time slot or a second HARQ feedback received for the second time slot.

[0010] Some aspects described herein relate to a UE for wireless communication. The UE may include a memory and one or more processors coupled to the memory. The one or more processors may be configured to transmit a first sidelink transmission during a Co-op (COT) on a sidelink, beginning at a second start symbol candidate that appears after a first start symbol candidate appearing at the beginning of a first time slot in the COT. The one or more processors may be configured to transmit a second sidelink transmission during the COT on a sidelink, the second sidelink transmission spanning the duration of a second time slot appearing after the first time slot in the COT. The one or more processors may be configured to determine a contention window adjustment based at least in part on a first HARQ feedback received for the first time slot and a second HARQ feedback received for the second time slot.

[0011] Some aspects described herein relate to a non-transitory computer-readable medium storing a set of instructions for wireless communication by a UE. When executed by one or more processors of the UE, the set of instructions causes the UE to transmit a first sidelink transmission during the COT (Concurrent Opportunity) on a sidelink, beginning at a second start symbol candidate that appears after a first start symbol candidate appearing at the beginning of a first time slot in the COT. When executed by one or more processors of the UE, the set of instructions causes the UE to transmit a second sidelink transmission during the COT on a sidelink, spanning the duration of a second time slot appearing after the first time slot in the COT. When executed by one or more processors of the UE, the set of instructions causes the UE to determine a contention window adjustment at least in part based on HARQ feedback received for the second time slot.

[0012] Some aspects described herein relate to a non-transitory computer-readable medium storing a set of instructions, when executed by one or more processors of a UE, for wireless communication by one or more instructions. When executed by one or more processors of the UE, the set of instructions causes the UE to transmit a first sidelink transmission during a Co-op Time Opportunity (COT) on a sidelink, beginning at a second start symbol candidate that appears after a first start symbol candidate appearing at the beginning of a first time slot in the COT. When executed by one or more processors of the UE, the set of instructions causes the UE to transmit a second sidelink transmission during the COT on a sidelink, the second sidelink transmission spanning the duration of a second time slot appearing after the first time slot in the COT. When executed by one or more processors of the UE, the set of instructions causes the UE to determine a contention window adjustment at least in part based on a first HARQ feedback received for the first time slot or a second HARQ feedback received for the second time slot.

[0013] Some aspects described herein relate to a non-transitory computer-readable medium storing a set of instructions, when executed by one or more processors of a UE, for wireless communication by one or more instructions. When executed by one or more processors of the UE, the set of instructions causes the UE to transmit a first sidelink transmission during a Co-op Time Opportunity (COT) on a sidelink, beginning at a second start symbol candidate that appears after a first start symbol candidate appearing at the beginning of a first time slot in the COT. When executed by one or more processors of the UE, the set of instructions causes the UE to transmit a second sidelink transmission during the COT on a sidelink, spanning the duration of a second time slot appearing after the first time slot in the COT. When executed by one or more processors of the UE, the set of instructions causes the UE to determine a contention window adjustment at least in part based on a first HARQ feedback received for the first time slot and a second HARQ feedback received for the second time slot.

[0014] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include components for transmitting a first sidelink transmission during a Co-op Timeout (COT) on a sidelink, the second start symbol candidate appearing after a first start symbol candidate appearing at the beginning of a first time slot in the COT. The apparatus may include components for transmitting a second sidelink transmission during the COT on the sidelink, the second sidelink transmission spanning the duration of a second time slot appearing after the first time slot in the COT. The apparatus may include components for determining a contention window adjustment based at least in part on HARQ feedback received for the second time slot.

[0015] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include components for transmitting a first sidelink transmission during a Co-op Timeout (COT) on a sidelink, the second start symbol candidate appearing after a first start symbol candidate appearing at the beginning of a first time slot in the COT. The apparatus may include components for transmitting a second sidelink transmission during the COT on the sidelink, the second sidelink transmission spanning the duration of a second time slot appearing after the first time slot in the COT. The apparatus may include components for determining a contention window adjustment based at least in part on a first HARQ feedback received for the first time slot or a second HARQ feedback received for the second time slot.

[0016] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include components for transmitting a first sidelink transmission during a Co-op Timeout (COT) on a sidelink, the second start symbol candidate appearing after a first start symbol candidate appearing at the beginning of a first time slot in the COT. The apparatus may include components for transmitting a second sidelink transmission during the COT on the sidelink, the second sidelink transmission spanning the duration of a second time slot appearing after the first time slot in the COT. The apparatus may include components for determining a contention window adjustment based at least in part on a first HARQ feedback received for the first time slot and a second HARQ feedback received for the second time slot.

[0017] The general terms include, as fully described herein with reference to the accompanying drawings and description, and illustrated in the accompanying drawings and description, methods, apparatuses, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, network entities, network nodes, wireless communication devices and / or processing systems.

[0018] The features and technical advantages of the examples according to this disclosure have been summarized rather extensively above in order to better understand the detailed description below. Additional features and advantages will be described below. The disclosed concepts and specific examples can be readily used as the basis for modifying or designing other structures for achieving the same purpose of this disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein, in both their organization and manner of operation, and the associated advantages, will be better understood by considering the following description in conjunction with the accompanying drawings. Each of the drawings provided is for illustrative and descriptive purposes and not as a limitation of the definitions in the claims.

[0019] While aspects are described herein by way of example, those skilled in the art will understand that such aspects can be implemented in many different arrangements and scenarios. The techniques described herein can be implemented using different platform types, devices, systems, shapes, sizes, and / or package arrangements. For example, some aspects can be implemented via integrated chip implementations or other devices based on non-modular components (e.g., end-user equipment, vehicles, communication equipment, computing devices, industrial equipment, retail / shopping devices, medical devices, and / or artificial intelligence devices). Aspects can be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components, and / or system-level components. Devices incorporating the described aspects and features may include additional components and features for implementing and practicing the claimed and described aspects. For example, the transmission and reception of wireless signals may include one or more components for analog and digital purposes (e.g., hardware components including antennas, radio frequency (RF) chains, power amplifiers, modulators, buffers, processors, interleavers, adders, and / or summers). The aspects described herein are intended to be practiced in a wide variety of devices, components, systems, distributed arrangements, and / or end-user equipment of various sizes, shapes, and configurations. Attached Figure Description

[0020] Therefore, the foregoing features of this disclosure can be understood in detail, and a more specific description of the invention, which has been briefly summarized above, can be obtained by referring to various aspects, some of which are illustrated 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 the description may acknowledge other equally valid aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0021] Figure 1 This is a diagram illustrating an example of a wireless network according to the present disclosure.

[0022] Figure 2 This is a diagram illustrating an example of communication between a network node and a user equipment (UE) in a wireless network according to the present disclosure.

[0023] Figure 3 This is a diagram illustrating an example decomposed base station architecture according to this disclosure.

[0024] Figure 4 This is a diagram illustrating an example of sidelink communication according to this disclosure.

[0025] Figure 5 This is a diagram illustrating examples of sidelink communication and access link communication according to this disclosure.

[0026] Figure 6 This is a diagram illustrating an example of side-link communication in a shared wireless communication spectrum according to this disclosure.

[0027] Figure 7A and Figure 7B This is a diagram illustrating an example of contention window adjustment in sidelink communication according to this disclosure.

[0028] Figure 8 This is a diagram illustrating an example procedure performed by a UE according to this disclosure, for example.

[0029] Figure 9 This is a diagram illustrating an example procedure performed by a UE according to this disclosure, for example.

[0030] Figure 10 This is a diagram illustrating an example procedure performed by a UE according to this disclosure, for example.

[0031] Figure 11 This is a diagram of an example device for wireless communication according to the present disclosure. Detailed Implementation

[0032] A sidelink resource pool may include one or more resources (e.g., time-domain resources, frequency-domain resources) on which sidelink transmissions can be sent and / or received on the sidelink within the wireless network. In some cases, the sidelink resource pool may be configured with multiple start symbol candidates, at which user equipment (UE) can initiate sidelink transmissions. A first start symbol candidate may appear at the beginning of a time slot, and one or more additional start symbol candidates may appear at some point within that time slot. Additional start symbol candidates provide the sidelink UE with more options to initiate sidelink transmissions, increasing the likelihood that the UE will be able to successfully complete the Listen-Before-Speak (LBT) process and transmit on the sidelink during the Channel Occupied Time (COT).

[0033] However, the availability of additional start symbol candidates within a time slot can reduce the time-domain resources (e.g., symbols) available for sidelink transmission within the time slot. For example, a UE may be required to complete a sidelink transmission at a specific end time, regardless of whether the UE begins the sidelink transmission at the first start symbol candidate at the beginning of the time slot or at an additional start symbol candidate within that time slot, resulting in fewer symbols available for sidelink transmission. This can lead to puncturing of sidelink transmission, which can increase the likelihood that the UE receives a negative acknowledgment (NACK) as feedback for Hybrid Automatic Repeat Request (HARQ) for sidelink transmission.

[0034] Furthermore, if the sidelink transmission begins at an additional start symbol candidate within that time slot, the nominal symbol duration (also known as the configured number of reference symbols) used by the UE to determine the transport block size (TBS) of the sidelink transmission may differ from the actual symbol duration of the sidelink transmission. This can lead to inaccurate coding of the sidelink transmission, thereby further increasing the likelihood that a NACK will be received as HARQ feedback for the sidelink transmission.

[0035] If the Tx UE receives a NACK sent for the side link, the NACK may cause the UE to unnecessarily increase the size (e.g., duration) of the contention window used to perform the LBT procedure, even if the UE has been able to successfully complete the LBT procedure.

[0036] In some aspects described herein, the UE can successfully complete the LBT procedure to obtain a COT for transmitting sidelink communication on the sidelink. If the sidelink resource pool associated with the sidelink transmission is configured with multiple start symbol candidates (e.g., a first start symbol candidate appearing at the beginning of each time slot and one or more additional start symbol candidates appearing within each time slot), the UE can initiate sidelink transmission at one of the additional start symbol candidates in the time slot. If the COT spans multiple time slots, the UE can intelligently select which time slot's HARQ feedback to use to determine contention window adjustment.

[0037] For example, the UE can determine to use HARQ feedback associated with the first full-timeslot sidelink transmission in the COT because the first full-timeslot sidelink transmission is less likely to be punctured and / or can be encoded more accurately, which can reduce the likelihood that the UE receives a NACK for the first full-timeslot sidelink transmission. This can avoid or reduce the possibility that the UE unnecessarily increases the size (e.g., duration) of the contention window.

[0038] 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 presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be comprehensive and complete, and will fully convey the scope of protection of this disclosure to those skilled in the art. Those skilled in the art will understand that the scope of this disclosure is intended to cover any aspect of this disclosure disclosed herein, whether implemented independently or in combination with any other aspect of this disclosure. For example, any number of aspects set forth herein may be used to implement an apparatus or practice. Furthermore, the scope of this disclosure is intended to cover 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.

[0039] Various devices and techniques will now be used to illustrate several aspects of a telecommunications system. These devices and techniques will be described in the following specific implementations and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, or algorithms (collectively, “elements”). These elements may be implemented using hardware, software, or a combination thereof. Whether these elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the system as a whole.

[0040] Although terms generally associated with 5G or New Radio (NR) Radio Access Technology (RAT) may be used herein to describe aspects, aspects of this disclosure may be applied to other RATs, such as 3G RAT, 4G RAT and / or 5G and later (e.g., 6G) RATs.

[0041] Figure 1This is a diagram illustrating an example of a wireless network 100 according to the present disclosure. The wireless network 100 may be a 5G (e.g., NR) network and / or a 4G (e.g., LTE) network, or may include elements of a 5G (e.g., NR) network and / or elements of a 4G (e.g., LTE) network, etc. The wireless network 100 may include one or more network nodes 110 (shown as network node 110a, network node 110b, network node 110c, and network node 110d), one or more UEs 120 (shown as UE 120a, UE 120b, UE 120c, UE 120d, and UE 120e), and / or other entities. Network node 110 is a network node that communicates with UE 120. As shown, network node 110 may include one or more network nodes. For example, network node 110 may be an aggregated network node, meaning that the aggregated network node is configured to utilize a radio protocol stack that is physically or logically integrated within a single radio access network (RAN) node (e.g., within a single device or unit). As another example, network node 110 may be a decomposed network node (sometimes referred to as a decomposed base station), meaning that network node 110 is configured to utilize a protocol stack that is physically or logically distributed among two or more nodes (such as one or more central units (CUs), one or more distributed units (DUs), or one or more radio units (RUs)).

[0042] In some examples, network node 110 is or includes network nodes (such as RUs) that communicate with UE 120 via a radio access link. In some examples, network node 110 is or includes network nodes (such as DUs) that communicate with other network nodes 110 via a fronthaul or midhaul link. In some examples, network node 110 is or includes network nodes (such as CUs) that communicate with other network nodes 110 via a midhaul link or with the core network via a backhaul link. In some examples, network node 110 (such as aggregated network node 110 or decomposed network node 110) may include multiple network nodes, such as one or more RUs, one or more CUs, and / or one or more DUs. Network node 110 may include, for example, NR base stations, LTE base stations, Node Bs, eNBs (e.g., in 4G), gNBs (e.g., in 5G), access points, Transmit / Receive Points (TRPs), DUs, RUs, CUs, network mobility elements, core network nodes, network elements, network equipment, RAN nodes, or combinations thereof. In some examples, network nodes 110 can interconnect with each other or to one or more other network nodes 110 in the wireless network 100 using any suitable transport network through various types of fronthaul interfaces, midhaul interfaces, and / or backhaul interfaces (such as direct physical connections, air interfaces, or virtual networks).

[0043] In some examples, network node 110 may provide communication coverage for a specific geographic area. In the 3rd Generation Partnership Project (3GPP), depending on the context of terminology use, the term "cell" may refer to the coverage area of ​​network node 110 and / or the network node subsystem serving that coverage area. Network node 110 may provide communication coverage for macrocells, picocells, femtocells, and / or another type of cell. A macrocell may cover a relatively large geographic area (e.g., a radius of several kilometers) and may allow unrestricted access by UE 120 with a service subscription. A picocell may cover a relatively small geographic area and may allow unrestricted access by UE 120 with a service subscription. A femtocell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UE 120 associated with the femtocell (e.g., UE 120 in a Closed Subscriber Group (CSG)). Network node 110 used for macrocells may be referred to as a macro network node. Network node 110 used for picocells may be referred to as a pico network node. The network node 110 used for femtocells can be referred to as a femtocell network node or a home network node. Figure 1 In the example shown, network node 110a can be a macro network node for macro cell 102a, network node 110b can be a pico network node for pico cell 102b, and network node 110c can be a femto network node for femto cell 102c. Network nodes can support one or more (e.g., three) cells. In some examples, cells may not be stationary, and the geographical area of ​​the cell may move depending on the location of the mobile network node 110 (e.g., a mobile network node).

[0044] In some aspects, the term "base station" or "network node" may refer to an aggregated base station, a decomposed base station, an integrated access and backhaul (IAB) node, a relay node, or one or more components thereof. For example, in some aspects, "base station" or "network node" may refer to a CU, DU, RU, a near real-time (near RT) RAN intelligent controller (RIC), or a non-real-time (non-RT) RIC, or a combination thereof. In some aspects, the term "base station" or "network node" may refer to a device configured to perform one or more functions (such as those described herein in conjunction with network node 110). In some aspects, the term "base station" or "network node" may refer to multiple devices configured to perform one or more functions. For example, in some distributed systems, each of multiple different devices (which may be located in the same geographical location or different geographical locations) may be configured to perform at least a portion of a function, or repeatedly perform at least a portion of that function, and the term "base station" or "network node" may refer to any one or more of these different devices. In some aspects, the term "base station" or "network node" may refer to one or more virtual base stations or one or more virtual base station functions. For example, in some aspects, two or more base station functions can be instantiated on a single device. In some aspects, the term "base station" or "network node" may refer to one base station function rather than another. In this way, a single device can include more than one base station.

[0045] Wireless network 100 may include one or more relay stations. A relay station is a network node that can receive data transmissions from upstream nodes (e.g., network node 110 or UE 120) and transmit data to downstream nodes (e.g., UE 120 or network node 110). A relay station may be a UE 120 that can relay transmissions to other UE 120s. Figure 1 In the example shown, network node 110d (e.g., a relay network node) can communicate with network node 110a (e.g., a macro network node) and UE 120d to facilitate communication between network node 110a and UE 120d. The network node 110 for relay communication may be referred to as a relay station, relay base station, relay network node, relay node, relay, etc.

[0046] The wireless network 100 can be a heterogeneous network, comprising different types of network nodes 110, such as macro network nodes, pico network nodes, femto network nodes, relay network nodes, etc. These different types of network nodes 110 may have different transmit power levels, different coverage areas, and / or different effects on interference in the wireless network 100. For example, macro network nodes may have high transmit power levels (e.g., 5 watts to 40 watts), while pico network nodes, femto network nodes, and relay network nodes may have lower transmit power levels (e.g., 0.1 watts to 2 watts).

[0047] Network controller 130 may be coupled to or communicate with a group of network nodes 110, and may provide coordination and control for these network nodes 110. Network controller 130 may communicate with network nodes 110 via a backhaul or midhaul link. Network nodes 110 may also communicate directly with each other, or indirectly via a wireless or wired backhaul link. In some aspects, network controller 130 may be a CU or a core network device, or may include a CU or a core network device.

[0048] UE 120 may be distributed throughout the wireless network 100, and each UE 120 may be stationary or mobile. UE 120 may include, for example, access terminals, terminals, mobile stations, and / or subscriber units. UE 120 may be a cellular phone (e.g., a smartphone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet computer, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device, a biometric device, a wearable device (e.g., a smartwatch, smart clothing, smart glasses, a smart wristband, smart jewelry (e.g., a smart ring or smart bracelet)), an entertainment device (e.g., a music device, a video device, and / or a satellite radio), a vehicle component or sensor, a smart meter / sensor, industrial manufacturing equipment, a GPS device, a UE function of a network node, and / or any other suitable device configured to communicate via wireless or wired media.

[0049] Some UEs 120 may be considered Machine-Type Communication (MTC) or Evolved or Enhanced Machine-Type Communication (eMTC) UEs. MTC UEs and / or eMTC UEs may include, for example, robots, drones, remote devices, sensors, meters, monitors, and / or location tags that can communicate with network nodes, another device (e.g., a remote device), or some other entity. Some UEs 120 may be considered Internet of Things (IoT) devices and / or may be implemented as NB-IoT (Narrowband IoT) devices. Some UEs 120 may be considered customer premises equipment. UEs 120 may be included within a housing that houses the components of the UE 120, such as processor components and / or memory components. In some examples, the processor components and memory components may be coupled together. For example, the processor components (e.g., one or more processors) and memory components (e.g., memory) may be operatively coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0050] Generally, any number of wireless networks 100 can be deployed in a given geographical area. Each wireless network 100 can support a specific RAT and can operate on one or more frequencies. A RAT may be referred to as a radio technology, air interface, etc. A frequency may be referred to as a carrier, frequency channel, etc. Each frequency in a given geographical area can support a single RAT to avoid interference between wireless networks using different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0051] In some examples, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly using one or more sidelink channels (e.g., without using network node 110 as an intermediary device to communicate with each other). For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, or vehicle-to-pedestrian (V2P) protocols) and / or mesh networks. In such examples, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by network node 110.

[0052] Devices in 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 Wireless Network 100 can communicate using one or more operating frequency bands. In 5G NR, two initial operating frequency bands have been designated as frequency ranges FR1 (410MHz to 7.125GHz) and FR2 (24.25GHz to 52.6GHz). It should be understood that although a portion of FR1 is greater than 6GHz, FR1 is often (interchangeably) referred to as the “sub-6GHz” band in various documents and articles. Similar naming issues sometimes occur with FR2, which is often (interchangeably) referred to as the “millimeter wave” band in documents and articles, although this is different from the Extremely High Frequency (EHF) band (30GHz–300GHz) designated as a “millimeter wave” band by the International Telecommunication Union (ITU).

[0053] The frequencies between FR1 and FR2 are generally referred to as intermediate frequency (IF) bands. Recent 5G NR studies have designated the operating bands for these IF bands as the frequency range designation FR3 (7.125 GHz – 24.25 GHz). Bands falling within FR3 can inherit FR1 and / or FR2 characteristics, thus effectively extending the features of FR1 and / or FR2 to IF band frequencies. Additionally, higher frequency bands are currently being explored to extend 5G NR operation beyond 52.6 GHz. For example, three higher operating bands have been designated as the frequency range designations FR4a or FR4-1 (52.6 GHz to 71 GHz), FR4 (52.6 GHz to 114.25 GHz), and FR5 (114.25 GHz to 300 GHz). Each of these higher frequency bands falls within the EHF band.

[0054] Considering the examples above, unless otherwise specified, it should be understood that if the term "below 6 GHz" is used herein, it can broadly refer to frequencies below 6 GHz, within FR1, or including intermediate frequency band frequencies. Furthermore, unless otherwise specified, it should be understood that if the term "millimeter wave" is used herein, it can broadly refer to frequencies that can include intermediate frequency band frequencies, within FR2, FR4, FR4-a, or FR4-1 and / or FR5, or within the EHF band. Modifications to frequencies included in these operating frequency bands (e.g., FR1, FR2, FR3, FR4, FR4-a, FR4-1, and / or FR5) are contemplated, and the techniques described herein are applicable to those modified frequency ranges.

[0055] In some aspects, UE 120 may include a communication manager 140. As described in more detail elsewhere herein, the communication manager 140 may transmit a first sidelink transmission during COT on a sidelink, beginning at a second start symbol candidate that appears after a first start symbol candidate that appears at the beginning of a first time slot in the COT; transmit a second sidelink transmission during COT on that sidelink, spanning the duration of a second time slot that appears after the first time slot in the COT; and determine a contention window adjustment based at least in part on HARQ feedback received for the second time slot. Additionally or alternatively, the communication manager 140 may perform one or more other operations described herein.

[0056] In some aspects, UE 120 may include a communication manager 140. As described in more detail elsewhere herein, the communication manager 140 may transmit a first sidelink transmission during COT on a sidelink, beginning at a second start symbol candidate that appears after a first start symbol candidate that appears at the beginning of a first time slot in the COT; transmit a second sidelink transmission during COT on that sidelink, spanning the duration of a second time slot that appears after the first time slot in the COT; and determine a contention window adjustment based at least in part on a first HARQ feedback received for the first time slot or a second HARQ feedback received for the second time slot. Additionally or alternatively, the communication manager 140 may perform one or more other operations described herein.

[0057] In some aspects, UE 120 may include a communication manager 140. As described in more detail elsewhere herein, the communication manager 140 may transmit a first sidelink transmission during COT on a sidelink, beginning at a second start symbol candidate that appears after a first start symbol candidate appearing at the beginning of a first time slot in the COT; transmit a second sidelink transmission during COT on that sidelink, spanning the duration of a second time slot appearing after the first time slot in the COT; and determine a contention window adjustment based at least in part on a first HARQ feedback received for the first time slot and a second HARQ feedback received for the second time slot. Additionally or alternatively, the communication manager 140 may perform one or more other operations described herein.

[0058] As indicated above, Figure 1 This is provided as an example. Other examples are available with reference to [the relevant information]. Figure 1 The examples described are different.

[0059] Figure 2 This is a diagram illustrating example 200 of communication between network node 110 and UE 120 in a wireless network 100 according to the present disclosure. Network node 110 may be equipped with a set of antennas 234a to 234t, such as T antennas (T≥1). UE 120 may be equipped with a set of antennas 252a to 252r, such as R antennas (R≥1). Network node 110 of example 200 includes one or more radio frequency components, such as antennas 234 and modems 232. In some examples, network node 110 may include an interface, communication components, or another component facilitating communication with UE 120 or another network node. Some network nodes 110 may not include radio frequency components facilitating direct communication with UE 120, such as one or more CUs or one or more DUs.

[0060] At network node 110, transmitting processor 220 can receive data from data source 212 intended for use by UE 120 (or a group of UEs 120). Transmitting processor 220 can select one or more modulation and decoding schemes (MCS) for UE 120 based at least in part on one or more channel quality indicators (CQIs) received from UE 120. Network node 110 can process (e.g., encode and modulate) the data for UE 120 based at least in part on the MCS selected for UE 120 and can provide data symbols for UE 120. Transmitting processor 220 can process system information (e.g., for semi-static resource partitioning information (SRPI)) and control information (e.g., CQI requests, grants, and / or upper-layer signaling) and provide overhead symbols and control symbols. Transmitting processor 220 can generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS) or demodulation reference signals (DMRS)) and synchronization signals (e.g., primary synchronization signal (PSS) or secondary synchronization signal (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 can perform spatial processing (e.g., pre-decoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, where applicable, and can provide a set of output symbol streams (e.g., T output symbol streams) to a corresponding set of modems 232 (e.g., T modems) (shown as modems 232a to 232t). For example, each output symbol stream can be provided to a modulator component (shown as MOD) of modem 232. Each modem 232 can use a corresponding modulator component to process the corresponding output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modem 232 can also use a corresponding modulator component to process the output sample stream (e.g., convert to analog, amplify, filter, and / or up-convert) to obtain a downlink signal. Modems 232a to 232t can transmit a set of downlink signals (e.g., T downlink signals) via a corresponding set of antennas 234 (e.g., T antennas) (shown as antennas 234a to 234t).

[0061] At UE 120, a set of antennas 252 (shown as antennas 252a to 252r) can receive downlink signals from network node 110 and / or other network nodes 110 and can provide a set of received signals (e.g., R received signals) to a set of modems 254 (e.g., R modems) (shown as modems 254a to 254r). For example, each received signal can be provided to a demodulator component (shown as DEMOD) of modem 254. Each modem 254 can use a corresponding demodulator component to condition (e.g., filter, amplify, downconvert, and / or digitize) the received signal to obtain an input sample. Each modem 254 can use the demodulator component to further process the input sample (e.g., for OFDM) to obtain a received symbol. MIMO detector 256 can obtain the received symbols from modem 254, perform MIMO detection on the received symbols where applicable, and provide the detected symbols. The receiver processor 258 can process (e.g., demodulate and decode) the detected symbols, provide the decoded data for UE 120 to data sink 260, and provide the 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 Reference Signal Received Power (RSRP) parameters, Received Signal Strength Indicator (RSSI) parameters, Reference Signal Received Quality (RSRQ) parameters, and / or CQI parameters, etc. In some examples, one or more components of UE 120 may be included in housing 284.

[0062] Network controller 130 may include communication unit 294, controller / processor 290, and memory 292. Network controller 130 may include one or more devices, for example, in a core network. Network controller 130 may communicate with network node 110 via communication unit 294.

[0063] One or more antennas (e.g., antennas 234a to 234t and / or antennas 252a to 252r) may include one or more antenna panels, one or more antenna groups, one or more sets of antenna elements and / or one or more antenna arrays, etc., or may be included within one or more antenna panels, one or more antenna groups, one or more sets of antenna elements and / or one or more antenna arrays, etc. Antenna panels, antenna groups, sets of antenna elements and / or antenna arrays may include one or more antenna elements (within a single housing or multiple housings), a set of coplanar antenna elements, a set of non-coplanar antenna elements and / or be coupled to one or more transmitting and / or receiving components (such as...). Figure 2 One or more antenna elements (one or more components in the process).

[0064] On the uplink, at UE 120, the transmit processor 264 can receive and process data from data source 262 and control information from controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, and / or CQI). The transmit processor 264 can generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be pre-decoded by the TX MIMO processor 266, where applicable, further processed by the modem 254 (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to network node 110. In some examples, the modem 254 of UE 120 may include a modulator and demodulator. In some examples, UE 120 includes a transceiver. The transceiver may include any combination of antenna 252, modem 254, MIMO detector 256, receive processor 258, transmit processor 264, and / or TX MIMO processor 266. The transceiver may be used by a processor (e.g., controller / processor 280) and memory 282 to execute this document (e.g., reference). Figures 6 to 11 ( ) aspects of any of the methods described in the method.

[0065] At network node 110, uplink signals from UE 120 and / or other UEs may be received by antenna 234, processed by modem 232 (e.g., demodulator component of modem 232 (shown as DEMOD)), detected by MIMO detector 236 (where applicable), and further processed by receive processor 238 to obtain decoded data and control information transmitted by UE 120. Receive processor 238 may provide the decoded data to data sink 239 and the decoded control information to controller / processor 240. Network node 110 may include communication unit 244 and may communicate with network controller 130 via communication unit 244. Network node 110 may include scheduler 246 to schedule one or more UEs 120 for downlink and / or uplink communication. In some examples, modem 232 of network node 110 may include modulator and demodulator. In some examples, network node 110 includes transceiver. The transceiver may include any combination of antenna 234, modem 232, MIMO detector 236, receive processor 238, transmit processor 220, and / or TX MIMO processor 230. The transceiver may be used by a processor (e.g., controller / processor 240) and memory 242 to execute this document (e.g., reference). Figures 6 to 11 ( ) aspects of any of the methods described in the method.

[0066] The controller / processor 240 of network node 110, the controller / processor 280 of UE 120 and / or Figure 2 Any other component may perform one or more techniques associated with contention window adjustment for sidelink communication, as described in more detail elsewhere herein. For example, the controller / processor 240 of network node 110, the controller / processor 280 of UE 120, and / or Figure 2 Any other component that can be executed or bootstrap, for example Figure 8 The process 800 Figure 9 The process 900 Figure 10 The operation of process 1000 and / or other processes as described herein. Memory 242 and memory 282 may store data and program code for network node 110 and UE 120, respectively. In some examples, memory 242 and / or memory 282 may include a non-transitory computer-readable medium storing one or more instructions (e.g., code and / or program code) for wireless communication. For example, one or more instructions, when executed by one or more processors of network node 110 and / or UE 120 (e.g., directly executed, or executed after compilation, transformation, and / or interpretation), may cause the one or more processors, UE 120, and / or network node 110 to execute or bootstrap, for example... Figure 8 The process 800 Figure 9 The process 900 Figure 10 The operation of process 1000 and / or other processes as described herein. In some examples, the execution instructions may include run instructions, transform instructions, compile instructions and / or interpret instructions, etc.

[0067] In some aspects, UE 120 includes components for transmitting a first sidelink transmission during COT on the sidelink, starting at a second start symbol candidate that appears after a first start symbol candidate that appears at the beginning of a first time slot in the COT; components for transmitting a second sidelink transmission during COT on the sidelink, the second sidelink transmission spanning the duration of a second time slot that appears after the first time slot in the COT; and / or components for determining contention window adjustments based at least in part on HARQ feedback received for the second time slot. Components enabling UE 120 to perform the operations described herein may include, for example, one or more of the following: communication manager 140, antenna 252, modem 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, controller / processor 280, or memory 282.

[0068] In some aspects, UE 120 includes components for transmitting a first sidelink transmission during COT on a sidelink, starting at a second start symbol candidate that appears after a first start symbol candidate that appears at the beginning of a first time slot in the COT; components for transmitting a second sidelink transmission during COT on a sidelink, the second sidelink transmission spanning the duration of a second time slot that appears after the first time slot in the COT; and / or components for determining contention window adjustment based at least in part on a first HARQ feedback received for the first time slot or a second HARQ feedback received for the second time slot. Components enabling UE 120 to perform the operations described herein may include, for example, one or more of a communication manager 140, an antenna 252, a modem 254, a MIMO detector 256, a receive processor 258, a transmit processor 264, a TX MIMO processor 266, a controller / processor 280, or a memory 282.

[0069] In some aspects, UE 120 includes components for transmitting a first sidelink transmission during COT on a sidelink, starting at a second start symbol candidate that appears after a first start symbol candidate that appears at the beginning of a first time slot in the COT; components for transmitting a second sidelink transmission during COT on a sidelink, the second sidelink transmission spanning the duration of a second time slot that appears after the first time slot in the COT; and / or components for determining contention window adjustment based at least in part on a first HARQ feedback received for the first time slot and a second HARQ feedback received for the second time slot. Components enabling UE 120 to perform the operations described herein may include, for example, one or more of a communication manager 140, an antenna 252, a modem 254, a MIMO detector 256, a receive processor 258, a transmit processor 264, a TX MIMO processor 266, a controller / processor 280, or a memory 282.

[0070] Although Figure 2 The boxes in the diagram are illustrated as different components, but the functions described above with respect to these boxes may 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 may be performed by or under the control of controller / processor 280.

[0071] As indicated above, Figure 2 This is provided as an example. Other examples are available with reference to [the relevant information]. Figure 2 The examples described are different.

[0072] Communication systems (such as 5G NR systems) can be deployed in various ways with a variety of components or parts. In a 5G NR system or network, network nodes, network entities, network mobility elements, RAN nodes, core network nodes, network elements, base stations, or network equipment can be implemented in a converged or decomposed architecture. For example, a base station (such as a Node B (NB), evolved NB (eNB), NR base station, 5G NB, access point (AP), TRP, or cell, etc.) or one or more units (or components) performing base station functions can be implemented as a converged base station (also known as a standalone base station or a single base station) or a decomposed base station. A "network entity" or "network node" can refer to a decomposed base station or one or more units of a decomposed base station (such as one or more CUs, one or more DUs, one or more RUs, or combinations thereof).

[0073] Aggregated base stations (e.g., aggregated network nodes) can be configured to utilize a radio protocol stack that is physically or logically integrated within a single RAN node (e.g., within a single device or cell). Decomposed base stations (e.g., decomposed network nodes) can be configured to utilize a protocol stack that is physically or logically distributed across two or more cells (such as one or more CUs, one or more DUs, or one or more RUs). In some examples, the CU may be implemented within a network node, and one or more DUs may be co-located with the CU, or alternatively, may be geographically or virtually distributed across one or more other network nodes. DUs may be implemented to communicate with one or more RUs. Each of the CU, DU, and RU may also be implemented as a virtual cell, such as a Virtual Central Unit (VCU), a Virtual Distributed Unit (VDU), or a Virtual Radio Unit (VRU), etc.

[0074] Base station type operation or network design can take into account the aggregation characteristics of base station functionality. For example, decomposed base stations can be utilized in IAB networks, Open Radio Access Networks (O-RAN (such as network configurations initiated by the O-RAN Alliance)), or Virtualized Radio Access Networks (vRAN, also known as Cloud Radio Access Networks (C-RAN)) to facilitate the scaling of communication systems by separating base station functionality into one or more units that can be deployed independently. Decomposed base stations can include functionality implemented by two or more units across various physical locations, as well as functionality virtually implemented for at least one unit, which enables flexibility in network design. The various units of a decomposed base station can be configured for wired or wireless communication with at least one other unit of the decomposed base station.

[0075] Figure 3This is an illustration of an example disaggregated base station architecture 300 according to this disclosure. The disaggregated base station architecture 300 may include a CU 310, which may communicate directly with the core network 320 via a backhaul link, or indirectly with the core network 320 via one or more disaggregated control units (such as near-RT RIC 325 via an E2 link, or a non-RT RIC 315 associated with a Service Management and Orchestration (SMO) framework 305, or both). The CU 310 may communicate with one or more DUs 330 via a corresponding midhaul link (such as via an F1 interface). Each DU 330 may communicate with one or more RUs 340 via a corresponding fronthaul link. Each RU 340 may communicate with one or more UEs 120 via a corresponding radio frequency (RF) access link. In some implementations, a UE 120 may be served simultaneously by multiple RUs 340.

[0076] Each unit in the clusters (including CU 310, DU 330, RU 340), as well as the near-RT RIC 325, non-RT RIC 315, and SMO frame 305, may include or be coupled to one or more interfaces configured to receive or transmit signals, data, or information (collectively, signals) via wired or wireless transmission media. Each unit in the cluster, or an associated processor or controller providing instructions to one or more communication interfaces of the respective unit, may be configured to communicate with one or more units in other clusters via transmission media. In some examples, each unit in the cluster may include a wired interface and a wireless interface configured to receive signals or transmit signals to one or more units in other clusters via a wired transmission media, and the wireless interface may include a receiver, transmitter, or transceiver (such as an RF transceiver) configured to receive signals or transmit signals to one or more units in other clusters via a wireless transmission media, or both.

[0077] In some aspects, the CU 310 can host one or more higher-level control functions. Such control functions may include Radio Resource Control (RRC) functions, Packet Data Convergence Protocol (PDCP) functions, or Service Data Adaptation Protocol (SDAP) functions, etc. Each control function can be implemented using an interface configured to signal to other control functions hosted by the CU 310. The CU 310 can be configured to handle user plane functions (e.g., Central Unit-User Plane (CU-UP) functions), control plane functions (e.g., Central Unit-Control Plane (CU-CP) functions), or combinations thereof. In some implementations, the CU 310 can be logically divided into one or more CU-UP units and one or more CU-CP units. When implemented in an O-RAN configuration, the CU-UP units can communicate bidirectionally with the CU-CP units via an interface (such as an E1 interface). The CU 310 can be implemented to communicate with the DU 330 for network control and signaling purposes, as needed.

[0078] Each DU 330 may correspond to a logical unit comprising one or more base station functions for controlling the operation of one or more RU 340s. In some aspects, the DU 330 may host one or more of the Radio Link Control (RLC) layer, Medium Access Control (MAC) layer, and one or more high physical (PHY) layers, at least in part, according to functional splits (such as those defined by 3GPP). In some aspects, the one or more high PHY layers may be implemented by one or more modules for forward error correction (FEC) encoding and decoding, scrambling, and modulation and demodulation, etc. In some aspects, the DU 330 may also host one or more low PHY layers, such as those implemented by one or more modules for Fast Fourier Transform (FFT), Inverse FFT (iFFT), Digital Beamforming, or Physical Random Access Channel (PRACH) extraction and filtering, etc. Each layer (which may also be referred to as a module) may be implemented using an interface configured to communicate signals with other layers (and modules) hosted by the DU 330 or with control functions hosted by the CU 310.

[0079] Each RU 340 can implement low-level functionality. In some deployments, an RU 340 controlled by a DU 330 can correspond to a logical node that hosts RF processing functions or low-PHY layer functions, such as performing FFT, performing iFFT, digital beamforming, or PRACH extraction and filtering, based on function splitting (e.g., function splitting defined by 3GPP) (such as low-level function splitting). In such architectures, each RU 340 can be operated to handle over-the-air (OTA) communications with one or more UEs 120. In some specific implementations, the real-time and non-real-time aspects of control plane and user plane communications with the RU 340 can be controlled by the corresponding DU 330. In some scenarios, this configuration allows each DU 330 and CU 310 to be implemented in a cloud-based RAN architecture (such as vRAN architecture).

[0080] The SMO framework 305 can be configured to support RAN deployment and provisioning of both non-virtualized and virtualized network elements. For non-virtualized network elements, the SMO framework 305 can be configured to support the deployment of dedicated physical resources for RAN coverage requirements, which can be managed via operation and maintenance interfaces such as the O1 interface. For virtualized network elements, the SMO framework 305 can be configured to interact with cloud computing platforms such as the Open Cloud (O-Cloud) platform 390 to perform network element lifecycle management (such as instantiating virtualized network elements) via cloud computing platform interfaces such as the O2 interface. Such virtualized network elements may include, but are not limited to, CU 310, DU 330, RU 340, non-RT RIC 315, and near-RTTRIC 325. In some specific implementations, the SMO framework 305 may communicate with hardware aspects of the 4G RAN, such as the Open eNB (O-eNB) 311, via the O1 interface. Additionally, in some implementations, the SMO framework 305 can communicate directly with each of one or more RUs 340 via a corresponding O1 interface. The SMO framework 305 may also include a non-RT RIC 315 configured to support the functionality of the SMO framework 305.

[0081] The non-RT RIC 315 can be configured to include logical functions enabling non-real-time control and optimization of RAN elements and resources, including AI / ML workflows for model training and updates, or policy-based guidance for applications / features in the near-RT RIC 325. The non-RT RIC 315 can be coupled to or communicate with the near-RT RIC 325, such as via an A1 interface. The near-RT RIC 325 can be configured to include logical functions enabling near real-time control and optimization of RAN elements and resources via data collection and actions through an interface such as an E2 interface connecting one or more CU 310s, one or more DU 330s, or both, and O-eNBs to the near-RT RIC 325.

[0082] In some implementations, to generate AI / ML models to be deployed in the near-RT RIC 325, the non-RT RIC 315 may receive parameters or external enrichment information from an external server. This information can be utilized by the near-RT RIC 325 and may be received from non-network data sources or network functions at the SMO framework 305 or the non-RT RIC 315. In some examples, the non-RT RIC 315 or near-RT RIC 325 may be configured to tune RAN behavior or performance. For example, the non-RT RIC 315 may monitor long-term trends and patterns in performance and employ AI / ML models to perform corrective actions via the SMO framework 305 (such as reconfiguration via the O1 interface) or via the creation of RAN management policies (such as A1 interface policies).

[0083] As indicated above, Figure 3 This is provided as an example. Other examples are available with reference to [the relevant information]. Figure 3 The examples described are different.

[0084] Figure 4 This is a diagram illustrating example 400 of sidelink communication according to this disclosure.

[0085] like Figure 4As shown, a first UE 405-1 (e.g., UE 120) can communicate with a second UE 405-2 (e.g., another UE 120) (and one or more other UEs 405) via one or more sidelink channels 410. UEs 405-1 and 405-2 can communicate using one or more sidelink channels 410 for P2P communication, D2D communication, V2X communication (e.g., which may include V2V communication, V2I communication, and / or V2P communication), and / or mesh networking. In some aspects, UEs 405 (e.g., UEs 405-1 and / or UEs 405-2) may correspond to one or more other UEs, such as UE 120, described elsewhere herein. In some aspects, one or more sidelink channels 410 may use a PC5 interface and / or may operate in a high-frequency band (e.g., the 5.9 GHz band). Additionally or alternatively, UE 405 may use Global Navigation Satellite System (GNSS) timing to synchronize the timing of transmission time intervals (TTIs) (e.g., frames, subframes, time slots, or symbols).

[0086] like Figure 4 As further shown, one or more sidelink channels 410 may include a Physical Sidelink Control Channel (PSCCH) 415, a Physical Sidelink Shared Channel (PSSCH) 420, and / or a Physical Sidelink Feedback Channel (PSFCH) 425. PSCCH 415 can be used to convey control information, similar to a Physical Downlink Control Channel (PDCCH) and / or a Physical Uplink Control Channel (PUCCH) for cellular communication with network node 110 via an access link or access channel. PSSCH 420 can be used to convey data, similar to a Physical Downlink Shared Channel (PDSCH) and / or a Physical Uplink Shared Channel (PUSCH) for cellular communication with network node 110 via an access link or access channel. For example, PSCCH 415 may carry sidelink control information (SCI) 430, which may indicate various control information for sidelink communication, such as one or more resources (e.g., time resources, frequency resources, and / or spatial resources), wherein a transport block (TB) 435 may be carried on PSSCH 420. TB 435 may include data. PSFCH425 may be used to communicate sidelink feedback 440, such as HARQ feedback (e.g., acknowledgment or negative acknowledgment (ACK / NACK) information), transmit power control (TPC), and / or scheduling request (SR).

[0087] Although shown on PSCCH 415, SCI 430 may include multiple communications at different levels (such as Level 1 SCI (SCI-1) and Level 2 SCI (SCI-2)) in some respects. SCI-1 may be transmitted on PSCCH 415. SCI-2 may be transmitted on PSSCH 420. SCI-1 may include, for example, indications of one or more resources on PSSCH 420 (e.g., time resources, frequency resources, and / or spatial resources), information for decoding sidelink communications on PSSCH, Quality of Service (QoS) priority values, resource reservation periods, PSSCH DMRS modes, SCI format for SCI-2, β offset for SCI-2, number of PSSCH DMRS ports, and / or MCS. SCI-2 may include information associated with data transmission on PSSCH 420, such as HARQ process ID, New Data Indicator (NDI), source identifier, destination identifier, and / or Channel State Information (CSI) report triggering.

[0088] In some aspects, one or more sidelink channels 410 may use a resource pool. For example, a scheduling assignment (e.g., included in SCI 430) may be transmitted across time using a specific resource block (RB) in a subchannel. In some aspects, data transmissions associated with a scheduling assignment (e.g., on PSSCH 420) may occupy adjacent RBs in the same subframe as the scheduling assignment (e.g., using frequency division multiplexing). In some aspects, the scheduling assignment and associated data transmissions are not transmitted on adjacent RBs.

[0089] In some aspects, UE 405 may operate using a sidelink transmission mode (e.g., mode 1), where resource selection and / or scheduling is performed by network node 110 (e.g., a base station, CU, or DU). For example, UE 405 may receive authorization for sidelink channel access and / or scheduling (e.g., in downlink control information (DCI) or in RRC messages, such as authorization for configuration) from network node 110 (e.g., directly or via one or more network nodes). In some aspects, UE 405 may operate using a transmission mode (e.g., mode 2), where resource selection and / or scheduling is performed by UE 405 (e.g., not by network node 110). In some aspects, UE 405 may perform resource selection and / or scheduling by sensing channel availability for transmission. For example, UE 405 can measure RSSI parameters (e.g., sidelink-RSSI (S-RSSI) parameters) associated with various sidelink channels, RSRP parameters (e.g., PSSCH-RSRP parameters) associated with various sidelink channels, and / or RSRQ parameters (e.g., PSSCH-RSRQ parameters) associated with various sidelink channels, and can select the channel for transmitting sidelink communication based at least in part on the measurements.

[0090] Alternatively or additionally, UE 405 may use SCI 430 received in PSCCH 415 to perform resource selection and / or scheduling, which may indicate the occupied resources and / or channel parameters. Alternatively or additionally, UE 405 may perform resource selection and / or scheduling by determining the Channel Busy Rate (CBR) associated with various sidelink channels, which may be used for rate control (e.g., by indicating the maximum number of resource blocks that UE 405 may use for a particular set of subframes).

[0091] In a transmission mode where resource selection and / or scheduling is performed by UE 405, UE 405 may generate a sidelink grant, which may be transmitted in SCI 430. The sidelink grant may indicate one or more parameters (e.g., transmission parameters) to be used for an upcoming sidelink transmission, such as one or more resource blocks (e.g., for TB 435) to be used for an upcoming sidelink transmission on PSSCH 420, one or more subframes to be used for an upcoming sidelink transmission, and / or the MCS to be used for an upcoming sidelink transmission. In some aspects, UE 405 may generate a sidelink grant indicating one or more parameters for semi-persistent scheduling (SPS), such as the periodicity of sidelink transmissions. Additionally or alternatively, UE 405 may generate a sidelink grant for event-driven scheduling (such as for on-demand sidelink messages).

[0092] As indicated above, Figure 4 This is provided as an example. Other examples are available with reference to [the relevant information]. Figure 4 The examples described are different.

[0093] Figure 5 This is a diagram illustrating example 500 of sidelink communication and access link communication according to this disclosure.

[0094] like Figure 5 As shown, the transmitter (Tx) / receiver (Rx) UE 505 and the Rx / Tx UE 510 can communicate with each other via a side link, as described above. Figure 4 As described. As further shown, in some sidelink modes, network node 110 may (e.g., directly or via one or more network nodes) communicate with Tx / Rx UE 505, such as via a first access link. Additionally or alternatively, in some sidelink modes, network node 110 may (e.g., directly or via one or more network nodes) communicate with Rx / Tx UE 510, such as via a first access link. Tx / Rx UE 505 and / or Rx / Tx UE 510 may correspond to one or more UEs described elsewhere herein, such as Figure 1 UE 120. Therefore, the direct link between UEs 120 (e.g., via the PC5 interface) can be referred to as a side link, and the direct link between network node 110 and UE 120 (e.g., via the Uu interface) can be referred to as an access link. Side link communication can be sent via the side link, and access link communication can be sent via the access link. Access link communication can be downlink communication (from network node 110 to UE 120) or uplink communication (from UE 120 to network node 110).

[0095] As indicated above, Figure 5 This is provided as an example. Other examples are available with reference to [the relevant information]. Figure 5 The examples described are different.

[0096] Figure 6 This is a diagram illustrating example 600 of sidelink communication in a shared wireless communication spectrum according to this disclosure.

[0097] In wireless communication spectrum, all or part of a frequency band can be shared between a sidelink UE in a wireless network and an entity known as the fixed service incumbent of the frequency band. When operating a portion of a wireless network (e.g., wireless network 100) in a shared wireless communication spectrum (e.g., using Licensed Assisted Access (LAA), Enhanced LAA (eLAA), and / or NR Unlicensed (NR-U), etc.), processes can be implemented to ensure fair coexistence with existing (e.g., WLAN) devices that can operate in the shared wireless communication spectrum.

[0098] For example, before gaining access to a frequency band in a shared wireless communication spectrum and / or transmitting on a frequency band in a shared wireless communication spectrum, UE 120 (or UE 405, UE 120, Tx / Rx UE 505, and / or Rx / Tx UE 510) may perform an LBT procedure to compete for access to a frequency band in the shared wireless communication spectrum. The LBT procedure may include an idle channel assessment (CCA) procedure to determine whether the frequency band is available (e.g., not occupied by other transmitters). Specifically, UE 120 may perform a CCA procedure to detect the energy level on the frequency band and determine whether the energy level meets (e.g., less than or equal to) an energy detection threshold for a threshold time period. When the energy level meets (e.g., less than) the energy detection threshold for a threshold duration, the LBT procedure is considered successful (referred to as a successful LBT procedure completion), and the transmitting device gains access to the unlicensed channel for a duration referred to as COT. During the channel occupancy time, UE 120 may perform one or more sidelink transmissions without having to perform any additional LBT operations. However, if the energy level fails to meet (e.g., equal to or exceed) the energy detection threshold, the LBT process fails, and the transmitting device's contention for access to the unlicensed channel is unsuccessful.

[0099] In cases where the LBT process fails due to the CCA process, resulting in the determination that the frequency band is unavailable (e.g., because the energy level detected on the frequency band indicates that another device is already using the channel), the CCA process can be executed again at a later time. In environments where the transmitting device may lack access to the frequency band (e.g., due to WLAN activity or transmissions by other devices), UE 120 can extend the window in which UE 120 can execute the CCA process (referred to as the contention window). Increasing the size of the contention window (e.g., increasing its duration) provides UE 120 with a longer duration during which it can attempt to successfully execute the CCA process to complete the LBT process successfully.

[0100] like Figure 6As shown, a sidelink resource pool can be allocated for sidelink communication between multiple sidelink UEs (e.g., UE 120, UE 405, UE 120, Tx / Rx UE 505, and / or Rx / Tx UE 510). The sidelink resource pool may include one or more resources (e.g., time-domain resources, frequency-domain resources) on which sidelink transmissions can be sent and / or received on sidelinks within a wireless network (e.g., wireless network 100). The time-domain resources included in the sidelink resource pool may include multiple time slots (e.g., time slot 0 to time slot N, etc.). Each time slot may include multiple symbols. The frequency-domain resources included in the sidelink resource pool may include frequency bands (or one or more frequency-domain resources included therein, such as resource blocks, resource elements, channels, subcarriers, and / or subchannels, etc.) included in a shared wireless communication spectrum.

[0101] The sidelink resource pool can be configured with multiple start symbol candidates, at which a sidelink UE can begin sidelink transmission. Each time slot may include a first start symbol candidate, and one or more additional start symbol candidates may appear within each time slot after the first start symbol candidate. Additional start symbol candidates provide the sidelink UE with more options to begin sidelink transmission, increasing the likelihood that the sidelink UE will be able to successfully complete the LBT process and transmit on the sidelink during the channel occupancy time.

[0102] In some aspects, the first start symbol candidate for a time slot may appear at the beginning of the time slot (e.g., corresponding to symbol #0 for each time slot). In some aspects, the first start symbol candidate for a time slot may be configured to appear after symbol #0 of that time slot. For example, the first start symbol candidate for a time slot may be configured as symbol #1, symbol #2, symbol #3, symbol #4, symbol #5, symbol #6, or another symbol in that time slot. In some aspects, the position of the first start symbol candidate in a time slot within the sidelink resource pool may be configured according to the bandwidth portion of the sidelink. In some aspects, if the position of the first start symbol candidate is not otherwise indicated in the configuration, the sidelink UE may use symbol #0 as the first start symbol candidate.

[0103] Additional start symbol candidates in a time slot may appear after the first start symbol candidate of that time slot. For example, an additional start symbol candidate for a time slot may be configured to appear after symbol #0 of the time slot. In some aspects, an additional start symbol candidate for a time slot may be configured as symbol #3, symbol #4, symbol #5, symbol #6, symbol #7, or another symbol in the time slot. In some aspects, an additional start symbol candidate for a time slot may be configured to appear early enough in the time slot to provide a specific number of symbols (e.g., at least 6 symbols or another number of symbols) for a sidelink transmission if the sidelink transmission begins at the additional start symbol candidate.

[0104] As indicated above, Figure 6 This is provided as an example. Other examples are available with reference to [the relevant information]. Figure 6 The examples described are different.

[0105] Figure 7A and Figure 7B This is a diagram illustrating example 700 of contention window adjustment in sidelink communication according to this disclosure. For example... Figure 7A and Figure 7B As shown, Example 700 may include UE 120 (or UE 405, UE 120, Tx / Rx UE 505, and / or Rx / Tx UE 510). UE 120 may communicate with another UE 120 on a sidelink in a wireless network (such as wireless network 100). UE 120 may communicate on a sidelink in a sidelink resource pool allocated for the sidelink. The sidelink resource pool may be configured with multiple start symbol candidates, at which UE 120 may initiate a sidelink transmission associated with the successful completion of the LBT procedure.

[0106] like Figure 7A As shown, at 705, UE 120 can perform an LBT procedure within a contention window in one or more time slots (e.g., time slot 0) of the sidelink resource pool. UE 120 can perform an LBT procedure to obtain channel occupancy time for transmitting one or more sidelink transmissions (e.g., to another UE 120) in the sidelink resource pool. The LBT procedure can be a Category 1 (CAT-1) LBT procedure, a Category 4 (CAT-4) LBT procedure, and / or another type of LBT procedure. If UE 120 can successfully complete the LBT procedure before the contention window ends, UE 120 can access the sidelink resource pool for COT.

[0107] At 710, UE 120 can transmit a partial time-slot sidelink transmission in time slot 0 of the COT. Since the LBT process is successfully completed after the first start symbol candidate appears in time slot 0, UE 120 can initiate or begin a partial time-slot sidelink transmission at an additional start symbol candidate in time slot 0. At 715 and 720, UE 120 can continue transmitting sidelink transmissions during the COT. For example, at 715, UE 120 can transmit a full time-slot sidelink transmission in time slot 1. As another example, at 720, UE 120 can transmit another full time-slot sidelink transmission in time slot 2. In some respects, the partial time-slot sidelink transmission at 710, the full time-slot sidelink transmission at 715, and the full time-slot sidelink transmission at 720 are all part of a single sidelink transmission spanning multiple time slots. In some aspects, slot-based transmission is supported in the sidelink resource pool; and the partial slot sidelink transmission at 710, the full slot sidelink transmission at 715, and the full slot sidelink transmission at 720 can each be slot-based sidelink transmission. The partial slot sidelink transmission at 710, the full slot sidelink transmission at 715, and the full slot sidelink transmission at 720 can each include PSSCH transmission, PSCCH transmission, and / or another type of sidelink transmission.

[0108] like Figure 7B As shown, UE 120 can receive HARQ feedback for sidelink transmissions at 710 to 720. UE 120 can receive HARQ feedback from one or more other UEs 120 to which it transmitted the sidelink transmissions at 710 to 720. For example, at 725, UE 120 can receive HARQ feedback (e.g., ACK or NACK) for a partial time-slot sidelink transmission at 710 transmitted in time slot 0. As another example, at 730, UE 120 can receive HARQ feedback (e.g., ACK or NACK) for a full time-slot sidelink transmission at 715 transmitted in time slot 1. As another example, at 735, UE 120 can receive HARQ feedback (e.g., ACK or NACK) for a full time-slot sidelink transmission at 720 transmitted in time slot 2.

[0109] In some aspects, UE 120 can receive HARQ feedback sent for a portion of the time-slot side link in time slot 0 (e.g., it can receive HARQ feedback in one or more symbols reserved in time slot 0 for the transmission and reception of HARQ feedback). In some aspects, UE 120 can receive HARQ feedback sent for a portion of the time-slot side link in the last symbol of time slot 0.

[0110] In some aspects, UE 120 may receive HARQ feedback transmitted for a full-timeslot sidelink in time slot 1 (e.g., it may receive HARQ feedback in one or more symbols reserved in time slot 1 for the transmission and reception of HARQ feedback). In some aspects, UE 120 may receive HARQ feedback transmitted for a full-timeslot sidelink in the last symbol of time slot 1.

[0111] In some aspects, UE 120 can receive HARQ feedback transmitted for the full-timeslot sidelink in time slot 2 (e.g., it can receive HARQ feedback in one or more symbols reserved in time slot 2 for the transmission and reception of HARQ feedback). In some aspects, UE 120 can receive HARQ feedback transmitted for the full-timeslot sidelink in the last symbol in time slot 2.

[0112] As another example, at 730, UE 120 may receive HARQ feedback (e.g., ACK or NACK) for a full-timeslot sidelink transmission at 715 transmitted in timeslot 1. As another example, at 735, UE 120 may receive HARQ feedback (e.g., ACK or NACK) for a full-timeslot sidelink transmission at 720 transmitted in timeslot 2.

[0113] like Figure 7B As further shown, at 740, UE 120 can determine the contention window adjustment used to perform the LBT procedure on the side link. UE 120 can increase the size of the contention window, decrease the size of the contention window, reset the size of the contention window to the default contention window size, and / or maintain the size of the contention window.

[0114] UE 120 may determine contention window adjustment based at least in part on HARQ feedback received for partial time-slot sidelink transmissions in time slot 0 (e.g., HARQ feedback associated with time slot 0) and / or at least in part on HARQ feedback received for full time-slot sidelink transmissions in time slot 1 (e.g., HARQ feedback associated with time slot 1). UE 120 may determine, at least in part, based on one or more parameters, whether to use HARQ feedback received for partial time-slot sidelink transmissions in time slot 0 (e.g., HARQ feedback associated with time slot 0) or HARQ feedback received for full time-slot sidelink transmissions in time slot 1 (e.g., HARQ feedback associated with time slot 1). Generally, since COT spans multiple time slots, UE 120 may intelligently select which HARQ feedback from which time slot to use to determine contention window adjustment.

[0115] In some respects, UE 120 may determine to use HARQ feedback associated with the first full-timeslot sidelink transmission in COT (e.g., HARQ feedback associated with the full-timeslot sidelink transmission in slot 1) because the first full-timeslot sidelink transmission is likely less likely to be punctured and / or likely to be encoded more accurately than a partial-timeslot sidelink transmission, which can reduce the likelihood that UE 120 receives a NACK for the first full-timeslot sidelink transmission. This can avoid or reduce the possibility that UE 120 unnecessarily increases the size (e.g., duration) of the contention window.

[0116] UE 120 may use the end symbol associated with the HARQ feedback transmitted for the first full-timeslot sidelink in COT (e.g., the HARQ feedback associated with the full-timeslot sidelink transmission in time slot 1) in a time slot as the end symbol of the contention window reference duration. Here, UE 120 may use the end symbol in time slot (time slot 1) as the end timing for defining the reference duration used to determine contention window adjustment.

[0117] In some aspects, UE 120 may determine whether to use HARQ feedback associated with a first full-timeslot sidelink transmission in the COT (e.g., HARQ feedback associated with slot 1) or HARQ feedback associated with a partial-timeslot sidelink transmission in the COT (e.g., HARQ feedback associated with slot 0). UE 120 may select either HARQ feedback associated with a first full-timeslot sidelink transmission in the COT or HARQ feedback associated with a partial-timeslot sidelink transmission in the COT based at least in part on whether the partial-timeslot sidelink transmission is accurately encoded.

[0118] For example, UE 120 may select, at least in part, the HARQ feedback associated with a first full-slot sidelink transmission in the COT or the HARQ feedback associated with a partial-slot sidelink transmission in the COT, based on a configured number of reference symbols configured for the sidelink resource pool, which is used to determine the transport block size for the sidelink transmission in the sidelink resource pool. The configured number of reference symbols (e.g., nominal symbol duration) used by UE 120 to determine the transport block size for the sidelink transmission may differ from the actual symbol duration of the sidelink transmission. Instead of using the actual number of symbols for the sidelink transmission, the configured number of reference symbols allows UE 120 to determine the transport block size for the sidelink transmission in the sidelink resource pool more quickly. Using the configured number of reference symbols to determine the transport block size for the sidelink transmission reduces the transmission latency of UE 120 because UE 120 does not have to wait until the actual number of symbols for the sidelink transmission is known, which may not be known until just before the sidelink transmission is sent, due to the availability of additional start symbol candidates in the sidelink resource pool.

[0119] UE 120 can determine the symbol number difference between the configured reference symbol number and the actual symbol number used for partial time-slot side link transmission. UE 120 can determine whether the symbol number difference meets a threshold number.

[0120] If UE 120 determines that the symbol number difference meets a threshold number (e.g., the symbol number difference equals the threshold number, or the symbol number difference is greater than the threshold number), UE 120 can determine the contention window adjustment at least in part based on the HARQ feedback associated with the first full-timeslot sidelink transmission in the COT (e.g., the HARQ feedback received for slot 1). This is because the difference between the configured reference symbol number and the actual symbol number used for partial-timeslot sidelink transmissions may be too large and could increase the likelihood of receiving a NACK for partial-timeslot sidelink transmissions. UE 120 can use the end symbol in the slot associated with the HARQ feedback for the first full-timeslot sidelink transmission in the COT (e.g., the HARQ feedback associated with the full-timeslot sidelink transmission in slot 1) as the end symbol of the contention window reference duration. Here, UE 120 can use the end symbol in the slot (slot 1) as the end timing for defining the reference duration used to determine the contention window adjustment.

[0121] If UE 120 determines that the symbol number difference does not meet a threshold number (e.g., the symbol number difference equals the threshold number, or the symbol number difference is less than the threshold number), UE 120 can determine the contention window adjustment at least in part based on the HARQ feedback associated with the first full-slot sidelink transmission in the COT (e.g., the HARQ feedback received for slot 1). This is because the difference between the configured reference symbol number and the actual symbol number used for partial-slot sidelink transmissions is small, which allows partial-slot sidelink transmissions to be accurately encoded. UE 120 can use the end symbol in the slot associated with the HARQ feedback for partial-slot sidelink transmissions in the COT (e.g., the HARQ feedback associated with partial-slot sidelink transmissions in slot 0) as the end symbol of the contention window reference duration. Here, UE 120 can use the end symbol in the slot (slot 0) as the end timing for defining the reference duration used to determine the contention window adjustment.

[0122] In some aspects, UE 120 may determine whether to use HARQ feedback associated with a first full-slot sidelink transmission in the COT (e.g., HARQ feedback associated with slot 1) and HARQ feedback associated with partial-slot sidelink transmissions in the COT (e.g., HARQ feedback associated with slot 0). If the sidelink transmissions at 710 to 720 are slot-based transmissions, UE 120 may be allowed to perform HARQ feedback combination (e.g., soft combination) on sidelink transmissions transmitted in the sidelink resource pool.

[0123] If the percentage of NACKs received during the COT period meets a percentage threshold (e.g., greater than or equal to 80% or another percentage), UE 120 may increase the size of the contention window. For example, if UE 120 determines that the percentage of NACKs received during the COT period (e.g., in reference subframe k) (referred to as the NACK percentage or NACK ratio Z) meets a percentage threshold, UE 120 may increase the size of the contention window (e.g., duration). In some respects, UE 120 may increase the size of the contention window (e.g., duration) for each priority class p to the next higher allowed value. As another example, if UE 120 determines that the percentage of NACKs received during the COT period (e.g., the NACK percentage or NACK ratio Z) does not meet a percentage threshold, UE 120 may maintain the size of the contention window (e.g., duration) (e.g., avoiding increasing the contention window size) or may reset the contention window size to the default size.

[0124] In some respects, UE 120 can assign or associate weights to HARQ feedback received in COT for HARQ feedback combination. For example, UE 120 can assign or associate a first weight to HARQ feedback received for partial time-slot sidelink transmission in time slot 0, a second weight to HARQ feedback received for full time-slot sidelink transmission in time slot 1, and so on. UE 120 can determine the NACK percentage at least in part based on the weights assigned to the HARQ feedback. In this way, HARQ feedback transmitted for a specific type of sidelink can have an increasing or decreasing effect on determining the NACK percentage.

[0125] In some aspects, UE 120 may assign or associate the same weight (e.g., equal weights) to or with HARQ feedback received for each slot in the COT. In other aspects, UE 120 may assign or associate different weights to or with HARQ feedback received for two or more slots in the COT. UE 120 may assign or associate weights at least in part based on the configured number of reference symbols determined for the transport block size in the sidelink resource pool. As indicated above, the configured number of reference symbols (e.g., nominal symbol duration) used by UE 120 to determine the transport block size for sidelink transmission may differ from the actual symbol duration for sidelink transmission. UE 120 may determine the symbol number difference between the configured number of reference symbols and the actual number of symbols used for partial slot sidelink transmission. UE 120 may assign or associate weights, at least in part, to HARQ feedback received for partial time-slot side-link transmissions in time slot 0 and HARQ feedback received for first full time-slot side-link transmissions in time slot 1, based on the symbol number difference.

[0126] In some respects, UE 120 may assign or associate weights to HARQ feedback received for a partial time-slot sidelink transmission in time slot 0 and HARQ feedback received for a first full time-slot sidelink transmission in time slot 1, at least in part, based on the magnitude of the symbol number difference. For example, a larger symbol number difference may assign a larger weight to the HARQ feedback received for the first full time-slot sidelink transmission in time slot 1 and a smaller weight to the HARQ feedback received for a partial time-slot sidelink transmission in time slot 0.

[0127] In some respects, UE 120 can determine whether the symbol number difference meets a threshold number. If UE 120 determines that the symbol number difference meets the threshold number (e.g., the symbol number difference is equal to the threshold number, or the symbol number difference is greater than the threshold number), then UE 120 can assign a larger weight to the HARQ feedback received for transmission to the first full-timeslot sidelink in time slot 1, and a smaller weight to the HARQ feedback received for transmission to the partial-timeslot sidelink in time slot 0. If UE 120 determines that the symbol number difference does not meet the threshold number (e.g., the symbol number difference is equal to the threshold number, or the symbol number difference is less than the threshold number), then UE 120 can assign a smaller weight to the HARQ feedback received for transmission to the first full-timeslot sidelink in time slot 1, and a larger weight to the HARQ feedback received for transmission to the partial-timeslot sidelink in time slot 0. In some respects, if the number of symbols determined by UE 120 does not meet the threshold number, UE 120 may assign a weight of 0 to the HARQ feedback received for transmission to the first full-time-slot side link in time slot 1, so that the HARQ feedback received for transmission to only a portion of the time slot side links in time slot 0 is used to determine the contention window adjustment.

[0128] As indicated above, Figure 7A and Figure 7B This is provided as an example. Other examples are available with reference to [the relevant information]. Figure 7A and Figure 7B The examples described are different.

[0129] Figure 8 This is a diagram illustrating an example procedure 800 performed by a UE according to this disclosure. Example procedure 800 is an example in which a UE (e.g., UE 120, UE 405, UE 120, Tx / Rx UE 505 and / or Rx / Tx UE 510) performs operations associated with determining contention window adjustments for sidelink communication.

[0130] like Figure 8 As shown, in some aspects, process 800 may include transmitting a first sidelink transmission during COT on the sidelink, starting at a second start symbol candidate that appears after a first start symbol candidate that appears at the beginning of a first time slot in the COT (box 810). For example, the UE (e.g., using...) Figure 11 The transmitting component 1104 and / or communication manager 1106 depicted in the diagram can transmit a first sidelink transmission during COT on the sidelink, starting at a second start symbol candidate that appears after a first start symbol candidate that appears at the beginning of a first time slot in the COT, as described above.

[0131] like Figure 8Further shown, in some aspects, process 800 may include sending a second sidelink transmission during COT on the sidelink, the second sidelink transmission spanning the duration of a second time slot that occurs after the first time slot in the COT (box 820). For example, the UE (e.g., using...) Figure 11 The transmitting component 1104 and / or communication manager 1106 depicted in the text can transmit a second sidelink transmission during the COT on the sidelink, which spans the duration of a second time slot that occurs after the first time slot in the COT, as described above.

[0132] like Figure 8 As further shown, in some aspects, process 800 may include determining a contention window adjustment (block 830) based at least in part on HARQ feedback received for the second time slot. For example, the UE (e.g., using...) Figure 11 The communication manager 1106 described above can determine contention window adjustments based at least in part on HARQ feedback received for the second time slot.

[0133] Process 800 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere in this document.

[0134] In a first aspect, determining the contention window adjustment includes: marking the end of the second time slot as the end of a reference duration for the contention window adjustment, and determining the contention window adjustment based at least in part on the reference duration.

[0135] In the second aspect, either alone or in combination with the first aspect, determining the contention window adjustment includes determining the contention window adjustment based at least in part on HARQ feedback received for the second time slot rather than on HARQ feedback received for the first time slot.

[0136] In the third aspect, either alone or in combination with one or more of the first and second aspects, determining that contention window adjustment includes increasing the size of the contention window for the LBT process on that side link based at least in part on the NACK ratio of the HARQ feedback for the second time slot.

[0137] although Figure 8 An example box of process 800 is shown, but in some respects, process 800 may include... Figure 8 The boxes depicted in the diagram may be fewer, different, or arranged differently than additional boxes. Alternatively, two or more boxes in the process 800 may be executed in parallel.

[0138] Figure 9This is a diagram illustrating an example procedure 900 performed by a UE according to this disclosure. Example procedure 900 is an example in which a UE (e.g., UE 120, UE 405, UE 120, Tx / Rx UE 505 and / or Rx / Tx UE 510) performs operations associated with determining contention window adjustments for sidelink communication.

[0139] like Figure 9 As shown, in some aspects, process 900 may include transmitting a first sidelink transmission during COT on the sidelink, starting at a second start symbol candidate that appears after a first start symbol candidate that appears at the beginning of a first time slot in the COT (box 910). For example, the UE (e.g., using...) Figure 11 The transmitting component 1104 and / or communication manager 1106 depicted in the diagram can transmit a first sidelink transmission during COT on the sidelink, starting at a second start symbol candidate that appears after a first start symbol candidate that appears at the beginning of a first time slot in the COT, as described above.

[0140] like Figure 9 Further shown, in some aspects, process 900 may include sending a second sidelink transmission during COT on the sidelink, the second sidelink transmission spanning the duration of a second time slot that occurs after the first time slot in the COT (box 920). For example, the UE (e.g., using...) Figure 11 The transmitting component 1104 and / or communication manager 1106 depicted in the text can transmit a second sidelink transmission during the COT on the sidelink, which spans the duration of a second time slot that occurs after the first time slot in the COT, as described above.

[0141] like Figure 9 Further shown, in some aspects, process 900 may include determining a contention window adjustment (block 930) based at least in part on a first HARQ feedback received for a first time slot or a second HARQ feedback received for a second time slot. For example, the UE (e.g., using...) Figure 11 The communication manager 1106 described above can determine contention window adjustments based at least in part on a first HARQ feedback received for a first time slot or a second HARQ feedback received for a second time slot, as described above.

[0142] Process 900 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere in this document.

[0143] In a first aspect, determining a contention window adjustment includes: determining to use a first HARQ feedback to determine the contention window adjustment; at least in part based on determining to use the first HARQ feedback to mark the end of a first time slot as the end of a reference duration for the contention window adjustment; and at least in part based on the reference duration to determine the contention window adjustment.

[0144] In the second aspect, either alone or in combination with the first aspect, determining the contention window adjustment includes determining the contention window adjustment based at least in part on the first HARQ feedback received for the first time slot rather than on the second HARQ feedback received for the second time slot.

[0145] In the third aspect, determining a competition window adjustment, either alone or in combination with one or more of the first and second aspects, includes: determining the competition window adjustment using a second HARQ feedback; determining, at least in part, a reference duration for identifying the end of a second time slot as the competition window adjustment using the second HARQ feedback; and determining the competition window adjustment based, at least in part, the reference duration.

[0146] In the fourth aspect, determining the contention window adjustment, either alone or in combination with one or more of the first to third aspects, includes: determining the contention window adjustment based at least in part on a second HARQ feedback received for the second time slot rather than on a first HARQ feedback received for the second time slot.

[0147] In the fifth aspect, determining the contention window adjustment, either alone or in combination with one or more of the first to fourth aspects, includes: determining that the difference between the number of reference symbols used to determine the transport block size for transmission on the first side link and the number of symbols used for transmission on the first side link satisfies a threshold; and determining the contention window adjustment based at least in part on the determination that the difference satisfies the threshold, based at least in part on the second HARQ feedback received for the second time slot.

[0148] In the sixth aspect, determining the contention window adjustment, either alone or in combination with one or more of the first to fifth aspects, includes: determining that the difference between the number of reference symbols used to determine the transport block size for transmission on the first side link and the number of symbols used for transmission on the first side link does not meet a threshold; and determining the contention window adjustment based at least in part on the determination that the difference does not meet the threshold, based at least in part on the first HARQ feedback received for the first time slot.

[0149] although Figure 9 An example box of process 900 is shown, but in some respects, process 900 may include... Figure 9The boxes depicted in the diagram may be fewer, different, or arranged differently than additional boxes. Alternatively, two or more boxes in process 900 may be executed in parallel.

[0150] Figure 10 This is a diagram illustrating an example procedure 1000 performed by a UE (e.g., UE 120, UE 405, UE 120, Tx / Rx UE 505, and / or Rx / Tx UE 510) according to this disclosure. Example procedure 1000 is an example in which a UE (e.g., UE 120) performs operations associated with determining a contention window adjustment for sidelink communication.

[0151] like Figure 10 As shown, in some aspects, process 1000 may include transmitting a first sidelink transmission during COT on the sidelink, starting at a second start symbol candidate that appears after a first start symbol candidate that appears at the beginning of a first time slot in the COT (box 1010). For example, the UE (e.g., using...) Figure 11 The transmitting component 1104 and / or communication manager 1106 depicted in the diagram can transmit a first sidelink transmission during COT on the sidelink, starting at a second start symbol candidate that appears after a first start symbol candidate that appears at the beginning of a first time slot in the COT, as described above.

[0152] like Figure 10 Further shown, in some aspects, process 1000 may include sending a second sidelink transmission during COT on the sidelink, the second sidelink transmission spanning the duration of a second time slot occurring after the first time slot in the COT (box 1020). For example, the UE (e.g., using...) Figure 11 The transmitting component 1104 and / or communication manager 1106 depicted in the text can transmit a second sidelink transmission during the COT on the sidelink, which spans the duration of a second time slot that occurs after the first time slot in the COT, as described above.

[0153] like Figure 10 Further shown, in some aspects, process 1000 may include determining a contention window adjustment based at least in part on a first HARQ feedback received for a first time slot and a second HARQ feedback received for a second time slot (block 1030). For example, the UE (e.g., using...) Figure 11 The communication manager 1106 described above can determine contention window adjustments based at least in part on: a first HARQ feedback received for a first time slot and a second HARQ feedback received for a second time slot, as described above.

[0154] Process 1000 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere in this document.

[0155] In the first aspect, determining the competition window adjustment based at least in part on the first HARQ feedback and the second HARQ feedback includes: determining the competition window adjustment based at least in part on a soft combination of the first HARQ feedback and the second HARQ feedback.

[0156] In the second aspect, determining the competition window adjustment based, either alone or in combination with the first aspect, at least in part on the first HARQ feedback and the second HARQ feedback includes: determining the NACK percentage of the combination of the first HARQ feedback and the second HARQ feedback; and determining whether the NACK percentage meets a percentage threshold.

[0157] In the third aspect, determining contention window adjustment based, either alone or in combination with one or more of the first and second aspects, at least in part on the first HARQ feedback and the second HARQ feedback, includes: determining that the NACK percentage meets a percentage threshold; and increasing the size of the contention window for the LBT process on the side link based at least in part on determining that the NACK percentage meets the percentage threshold.

[0158] In the fourth aspect, determining contention window adjustment based, either alone or in combination with one or more of the first to third aspects, at least in part on the first HARQ feedback and the second HARQ feedback, includes: determining that the NACK percentage does not meet a percentage threshold; and at least in part on determining that the NACK percentage meets the percentage threshold, avoiding increasing the size of the contention window for the LBT process on that side link.

[0159] In the fifth aspect, determining the NACK percentage, either alone or in combination with one or more of the first to fourth aspects, includes determining the NACK percentage using the same weighting applied to the first HARQ feedback and the second HARQ feedback.

[0160] In the sixth aspect, determining the NACK percentage, either alone or in combination with one or more of the first to fifth aspects, includes determining the NACK percentage using a first weighting for the first HARQ feedback and a second weighting for the second HARQ feedback.

[0161] In the seventh aspect, either alone or in combination with one or more of the first to sixth aspects, process 1000 includes: determining a first weighting for the first HARQ feedback based at least in part on the number of reference symbols used to determine the transport block size transmitted on the first side link.

[0162] In the eighth aspect, alone or in combination with one or more of the first to seventh aspects, process 1000 includes: determining a first weighting for the first HARQ feedback based at least in part on whether the difference between the number of reference symbols used to determine the transport block size for transmission of the first side link and the number of symbols used for transmission of the first side link satisfies a threshold.

[0163] although Figure 10 An example box of process 1000 is shown, but in some respects, process 1000 may include... Figure 10 The boxes depicted in the diagram may be fewer, different, or arranged differently than additional boxes. Alternatively, two or more boxes in process 1000 may be executed in parallel.

[0164] Figure 11 This is a diagram of an example device 1100 for wireless communication according to the present disclosure. Device 1100 may be a UE (e.g., UE 120, UE 405, UE 120, Tx / Rx UE 505 and / or Rx / Tx UE 510), or a UE may include device 1100. In some aspects, device 1100 includes a receiving component 1102, a transmitting component 1104, and / or a communication manager 1106 that can communicate with each other (e.g., via one or more buses and / or one or more other components). In some aspects, the communication manager 1106 is combined with... Figure 1 The communication manager 140 is described. As shown, the device 1100 can communicate with another device 1108, such as a UE or a network node (such as a CU, DU, RU or base station), using the receiving component 1102 and the transmitting component 1104.

[0165] In some respects, device 1100 can be configured to perform the functions described herein. Figure 7A and Figure 7B The described one or more operations. Additionally or alternatively, the apparatus 1100 may be configured to perform one or more processes described herein, such as Figure 8 The process 800 Figure 9 The process 900 Figure 10 The process 1000 or a combination thereof. In some respects, Figure 11 The illustrated device 1100 and / or one or more components may include a combination Figure 2 One or more components of the described UE. Additionally or alternatively, Figure 11 One or more components shown can be combined Figure 2Implementation within one or more of the described components. Additionally or alternatively, one or more of the components in a set 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.

[0166] Receiver 1102 may receive communications from device 1108, 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 (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, etc.) and may provide the processed signals to one or more other components of device 1100. In some aspects, receiver 1102 may include combinations of... Figure 2 The described UE includes one or more antennas, modems, demodulators, MIMO detectors, receiver processors, controllers / processors, memory, or combinations thereof.

[0167] Transmitting component 1104 may transmit communications, such as reference signals, control information, data communications, or combinations thereof, to device 1108. In some aspects, one or more other components of device 1100 may generate communications and provide the generated communications to transmitting component 1104 for transmission to device 1108. In some aspects, transmitting component 1104 may perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, etc.) on the generated communications and transmit the processed signals to device 1108. In some aspects, transmitting component 1104 may include combinations of... Figure 2 The described UE includes one or more antennas, modems, modulators, transmit MIMO processors, transmit processors, controllers / processors, memory, or combinations thereof. In some aspects, transmit component 1104 may be co-located with receive component 1102 in a transceiver.

[0168] The communication manager 1106 may support the operation of the receiving component 1102 and / or the transmitting component 1104. For example, the communication manager 1106 may receive information associated with configuring the reception of communications by the receiving component 1102 and / or the transmission of communications by the transmitting component 1104. Additionally or alternatively, the communication manager 1106 may generate control information and / or provide control information to the receiving component 1102 and / or the transmitting component 1104 to control the reception and / or transmission of communications.

[0169] In some implementations, the transmitting component 1104 may transmit a first sidelink transmission during the COT on the sidelink (e.g., to device 1108) that begins at a second start symbol candidate, which appears after a first start symbol candidate that appears at the beginning of a first time slot in the COT. The transmitting component 1104 may also transmit a second sidelink transmission during the COT on the sidelink (e.g., to device 1108) that spans the duration of a second time slot that appears after the first time slot in the COT. The communication manager 1106 may determine contention window adjustments based at least in part on HARQ feedback received for the second time slot from device 1108.

[0170] In some aspects, the transmitting component 1104 may transmit a first sidelink transmission during the COT on the sidelink (e.g., to device 1108) that begins at a second start symbol candidate, which appears after a first start symbol candidate that appears at the beginning of a first time slot in the COT. The transmitting component 1104 may also transmit a second sidelink transmission during the COT on the sidelink (e.g., to device 1108) that spans the duration of a second time slot in the COT that appears after the first time slot. The communication manager 1106 may determine contention window adjustments based at least in part on a first HARQ feedback received for the first time slot (e.g., from device 1108) or a second HARQ feedback received for the second time slot (e.g., from device 1108).

[0171] In some aspects, the transmitting component 1104 may transmit a first sidelink transmission during the COT on the sidelink (e.g., to device 1108) that begins at a second start symbol candidate, which appears after a first start symbol candidate that appears at the beginning of a first time slot in the COT. The transmitting component 1104 may also transmit a second sidelink transmission during the COT on the sidelink (e.g., to device 1108) that spans the duration of a second time slot in the COT that appears after the first time slot. The communication manager 1106 may determine contention window adjustments based at least in part on a first HARQ feedback received for the first time slot (e.g., from device 1108) and a second HARQ feedback received for the second time slot (e.g., from device 1108).

[0172] In some respects, the communication manager 1106 may determine the first weighting for the first HARQ feedback based at least in part on the number of reference symbols used to determine the transport block size transmitted on the first side link.

[0173] In some respects, the communication manager 1106 may determine a first weighting for the first HARQ feedback based at least in part on whether the difference between the number of reference symbols used to determine the transport block size for the first sidelink transmission and the number of symbols used for the first sidelink transmission satisfies a threshold.

[0174] Figure 11 The number and arrangement of components shown are provided as an example. In reality, they can exist in... Figure 11 The components shown are compared to additional components, fewer components, different components, or components arranged in a different manner. 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. Additionally or alternatively, Figure 11 The set (one or more) components shown are executable and described as being composed of Figure 11 The other set of components shown performs one or more functions.

[0175] The following provides an overview of some aspects of this disclosure:

[0176] Aspect 1: A method for wireless communication performed by a user equipment (UE), the method comprising: during a channel occupancy time (COT) on a sidelink, transmitting a first sidelink transmission starting at a second start symbol candidate, the second start symbol candidate appearing after a first start symbol candidate appearing at the beginning of a first time slot in the COT; during the COT on the sidelink, transmitting a second sidelink transmission spanning the duration of a second time slot appearing after the first time slot in the COT; and determining a contention window adjustment based at least in part on Hybrid Automatic Repeat Request (HARQ) feedback received for the second time slot.

[0177] Aspect 2: According to the method of aspect 1, determining the contention window adjustment includes: marking the end of the second time slot as the end of a reference duration for the contention window adjustment; and determining the contention window adjustment based at least in part on the reference duration.

[0178] Aspect 3: The method according to any one of Aspects 1 to 2, wherein determining the contention window adjustment comprises: determining the contention window adjustment based at least in part on the HARQ feedback received for the second time slot rather than on the HARQ feedback received for the first time slot.

[0179] Aspect 4: The method according to any one of Aspects 1 to 3, wherein determining the contention window adjustment comprises: increasing the size of the contention window for the Listen-After-Talk (LBT) process on the side link based at least in part on the negative acknowledgment (NACK) ratio of the HARQ feedback for the second time slot.

[0180] Aspect 5: A method of wireless communication performed by a user equipment (UE), the method comprising: during a channel occupancy time (COT) on a sidelink, transmitting a first sidelink transmission starting at a second start symbol candidate, the second start symbol candidate appearing after a first start symbol candidate appearing at the beginning of a first time slot in the COT; during the COT on the sidelink, transmitting a second sidelink transmission spanning the duration of a second time slot appearing after the first time slot in the COT; and determining a contention window adjustment based at least in part on a first hybrid automatic repeat request (HARQ) feedback received for the first time slot or a second HARQ feedback received for the second time slot.

[0181] Aspect 6: According to the method of aspect 5, determining the contention window adjustment includes: determining to use the first HARQ feedback to determine the contention window adjustment; identifying the end of the first time slot as the end of a reference duration of the contention window adjustment based at least in part on determining to use the first HARQ feedback; and determining the contention window adjustment based at least in part on the reference duration.

[0182] Aspect 7: According to the method of aspect 6, determining the contention window adjustment includes: determining the contention window adjustment based at least in part on the first HARQ feedback received for the first time slot rather than on the second HARQ feedback received for the second time slot.

[0183] Aspect 8: The method according to any one of Aspects 5 to 7, wherein determining the contention window adjustment comprises: determining to use the second HARQ feedback to determine the contention window adjustment; identifying the end of the second time slot as a reference duration for the contention window adjustment based at least in part on determining to use the second HARQ feedback; and determining the contention window adjustment based at least in part on the reference duration.

[0184] Aspect 9: According to the method of aspect 8, determining the contention window adjustment includes: determining the contention window adjustment based at least in part on the second HARQ feedback received for the second time slot rather than on the first HARQ feedback received for the second time slot.

[0185] Aspect 10: The method according to any one of Aspects 5 to 9, wherein determining contention window adjustment comprises: determining that the difference between the number of reference symbols used to determine the transport block size transmitted by the first side link and the number of symbols used to transmit by the first side link satisfies a threshold; and determining the contention window adjustment based at least in part on determining that the difference satisfies the threshold, and at least in part on the second HARQ feedback received for the second time slot.

[0186] Aspect 11: The method according to any one of Aspects 5 to 10, wherein determining contention window adjustment comprises: determining that the difference between the number of reference symbols used to determine the transport block size transmitted by the first side link and the number of symbols used to transmit by the first side link does not satisfy a threshold; and determining the contention window adjustment based at least in part on determining that the difference does not satisfy the threshold, and at least in part on the first HARQ feedback received for the first time slot.

[0187] Aspect 12: A method of wireless communication performed by a user equipment (UE), the method comprising: during a channel occupancy time (COT) on a sidelink, transmitting a first sidelink transmission starting at a second start symbol candidate, the second start symbol candidate appearing after a first start symbol candidate appearing at the beginning of a first time slot in the COT; during the COT on the sidelink, transmitting a second sidelink transmission spanning the duration of a second time slot appearing after the first time slot in the COT; and determining a contention window adjustment based at least in part on a first hybrid automatic repeat request (HARQ) feedback received for the first time slot and a second HARQ feedback received for the second time slot.

[0188] Aspect 13: The method according to aspect 12, wherein determining the competition window adjustment based at least in part on the first HARQ feedback and the second HARQ feedback comprises: determining the competition window adjustment based at least in part on a soft combination of the first HARQ feedback and the second HARQ feedback.

[0189] Aspect 14: The method according to any one of Aspects 12 to 13, wherein determining the competition window adjustment based at least in part on the first HARQ feedback and the second HARQ feedback comprises: determining a negative acknowledgment (NACK) percentage of the combination of the first HARQ feedback and the second HARQ feedback; and determining whether the NACK percentage meets a percentage threshold.

[0190] Aspect 15: The method according to aspect 14, wherein determining the contention window adjustment based at least in part on the first HARQ feedback and the second HARQ feedback comprises: determining that the NACK percentage meets the percentage threshold; and increasing the size of the contention window for the Listen-After-Speak (LBT) process on the side link based at least in part on determining that the NACK percentage meets the percentage threshold.

[0191] Aspect 16: The method according to aspects 14 to 15, wherein determining the contention window adjustment based at least in part on the first HARQ feedback and the second HARQ feedback includes: determining that the NACK percentage does not meet the percentage threshold; and avoiding increasing the size of the contention window for the Listen-After-Speak (LBT) process on the side link based at least in part on determining that the NACK percentage meets the percentage threshold.

[0192] Aspect 17: The method according to aspects 14 to 16, wherein determining the NACK percentage comprises: using the same weighting for the first HARQ feedback and the second HARQ feedback to determine the NACK percentage.

[0193] Aspect 18: The method according to aspects 14 to 17, wherein determining the NACK percentage comprises: using a first weighting for the first HARQ feedback and a second weighting for the second HARQ feedback to determine the NACK percentage.

[0194] Aspect 19: The method according to aspect 18, the method further comprising: determining the first weighting for the first HARQ feedback based at least in part on the number of reference symbols used to determine the transport block size transmitted by the first side link.

[0195] Aspect 20: The method according to aspects 18 to 19, the method further comprising: determining the first weighting for the first HARQ feedback based at least in part on whether the difference between the number of reference symbols used to determine the transport block size transmitted by the first side link and the number of symbols used to transmit by the first side link satisfies a threshold.

[0196] Aspect 21: An apparatus for wireless communication at a device, the apparatus comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method according to one or more of aspects 1 to 20.

[0197] Aspect 22: An apparatus for wireless communication, the apparatus comprising a memory and one or more processors coupled to the memory, the one or more processors being configured to perform the method according to one or more of aspects 1 to 20.

[0198] Aspect 23: An apparatus for wireless communication, the apparatus comprising at least one component for performing the method according to one or more of aspects 1 to 20.

[0199] Aspect 24: A non-transitory computer-readable medium storing code for wireless communication, the code including instructions executable by a processor to perform the method according to one or more of aspects 1 to 20.

[0200] Aspect 25: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions including one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method according to one or more of aspects 1 to 20.

[0201] While the foregoing disclosure provides examples and descriptions, it is not intended to be exhaustive or to limit the aspects to the precise form disclosed. Modifications and variations may be made based on the foregoing disclosure, or from practice in these areas.

[0202] As used herein, the term "component" is intended to be interpreted broadly as hardware and / or a combination of hardware and software. Whether referred to as software, firmware, middleware, microcode, hardware description language, or other names, "software" should be interpreted broadly as meaning instructions, instruction sets, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, and / or functions, etc. As used herein, a "processor" is implemented in hardware and / or a combination of hardware and software. It will be apparent to those skilled in the art that the systems and / or methods described herein can be implemented in various forms of hardware and / or combinations of hardware and software. The actual dedicated control hardware or software code used to implement these systems and / or methods is not limiting in any way. Therefore, no specific software code is referenced herein to describe the operation and behavior of the systems and / or methods, as those skilled in the art will understand that the software and hardware can be designed, at least in part, based on the descriptions herein, to implement the systems and / or methods.

[0203] As used in this article, depending on the context, "meeting the threshold" can mean 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.

[0204] Although specific combinations of features are set forth in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of the aspects. Many of these features can be combined in ways not specifically set forth in the claims and / or not disclosed in the specification. The disclosure of the aspects includes each dependent claim in combination with each other claim in the set of claims. As used herein, the phrase “at least one of…” referring to the list of items refers to any combination of these items (including a single member). As an example, “at least one of a, b, or c” is intended to cover a, b, c, a+b, a+c, b+c, and a+b+c, as well as any combination with multiple of the same element (e.g., a+a, a+a+a, a+a+b, a+a+c, a+b+b, a+c+c, b+b, b+b+b, b+b+c, c+c, and c+c+c, or any other ordering of a, b, and c).

[0205] No element, action, or instruction used herein should be construed as essential or necessary unless explicitly stated otherwise. Furthermore, as used herein, the articles “a” and “an” are intended to include one or more items and are used interchangeably with “one or more.” Furthermore, as used herein, the article “described” is intended to include one or more items mentioned in connection with the article “described” and is used interchangeably with “one or more.” Furthermore, as used herein, the terms “group” and “cluster” are intended to include one or more items and are used interchangeably with “one or more.” If only one item is desired, the phrase “only one” or similar terminology is used. Furthermore, as used herein, the terms “have,” “possess,” “have,” etc., are intended to be open-ended terms that do not limit the elements they modify (e.g., an element “having” A may also have B). Furthermore, the phrase “based on” is intended to mean “at least partially based on” unless otherwise explicitly stated. Furthermore, as used herein, the term “or” is intended to be open-ended when used in a series and is interchangeable with “and / or” unless otherwise explicitly stated (e.g., if used in conjunction with “any” or “only one of…”).

Claims

1. A method for wireless communication performed by a user equipment (UE), the method comprising: During the Channel Occupied Time (COT) on the side link, a first side link transmission is transmitted starting at a second start symbol candidate, which appears after a first start symbol candidate that appears at the beginning of a first time slot in the COT; During the COT on the side link, a second side link transmission is sent, the second side link transmission spanning the duration of a second time slot that occurs after the first time slot in the COT; as well as The contention window adjustment is determined at least in part based on the Hybrid Automatic Repeat Request (HARQ) feedback received for the second time slot.

2. The method of claim 1, wherein determining the competition window adjustment comprises: The end of the second time slot is marked as the end of the reference duration of the competition window adjustment; as well as The competition window adjustment is determined at least in part based on the reference duration.

3. The method of claim 1, wherein determining the competition window adjustment comprises: The contention window adjustment is determined at least in part based on the HARQ feedback received for the second time slot rather than on the HARQ feedback received for the first time slot.

4. The method of claim 1, wherein determining the competition window adjustment comprises: The size of the contention window for the Listen-After-Speak (LBT) process on the side link is increased, at least in part, based on the negative acknowledgment (NACK) ratio of the HARQ feedback for the second time slot.

5. A method for wireless communication performed by a user equipment (UE), the method comprising: During the Channel Occupied Time (COT) on the side link, a first side link transmission is transmitted starting at a second start symbol candidate, which appears after a first start symbol candidate that appears at the beginning of a first time slot in the COT; During the COT on the side link, a second side link transmission is sent, the second side link transmission spanning the duration of a second time slot that occurs after the first time slot in the COT; as well as The competition window adjustment is determined at least in part based on the following: In response to the first Hybrid Automatic Repeat Request (HARQ) feedback received in the first time slot, or The second HARQ feedback received in the second time slot.

6. The method of claim 5, wherein determining the competition window adjustment comprises: The first HARQ feedback is used to determine the competition window adjustment; At least in part, based on the determination to use the first HARQ feedback, the end of the first time slot is marked as the end of the reference duration of the contention window adjustment; as well as The competition window adjustment is determined at least in part based on the reference duration.

7. The method of claim 6, wherein determining the competition window adjustment comprises: The contention window adjustment is determined at least in part based on the first HARQ feedback received for the first time slot, rather than based on the second HARQ feedback received for the second time slot.

8. The method of claim 5, wherein determining the competition window adjustment comprises: It is determined that the second HARQ feedback will be used to determine the competition window adjustment; At least in part, based on the determination to use the second HARQ feedback, the end of the second time slot is identified as the reference duration for the contention window adjustment; as well as The competition window adjustment is determined at least in part based on the reference duration.

9. The method of claim 8, wherein determining the competition window adjustment comprises: The contention window adjustment is determined at least in part based on the second HARQ feedback received for the second time slot, rather than based on the first HARQ feedback received for the second time slot.

10. The method of claim 5, wherein determining the competition window adjustment comprises: The difference between the number of reference symbols used to determine the transport block size transmitted by the first side link and the number of symbols used to transmit by the first side link satisfies a threshold. as well as The contention window adjustment is determined at least in part based on determining that the difference satisfies the threshold, and at least in part based on the second HARQ feedback received for the second time slot.

11. The method of claim 5, wherein determining the competition window adjustment comprises: The difference between the number of reference symbols used to determine the transport block size transmitted by the first side link and the number of symbols used to transmit by the first side link does not meet the threshold. as well as The contention window adjustment is determined at least in part based on the determination that the difference does not meet the threshold, and at least in part based on the first HARQ feedback received for the first time slot.

12. A method for wireless communication performed by a user equipment (UE), the method comprising: During the Channel Occupied Time (COT) on the side link, a first side link transmission is transmitted starting at a second start symbol candidate, which appears after a first start symbol candidate that appears at the beginning of a first time slot in the COT; During the COT on the side link, a second side link transmission is sent, the second side link transmission spanning the duration of a second time slot that occurs after the first time slot in the COT; as well as The competition window adjustment is determined at least in part based on the following: In response to the first Hybrid Automatic Repeat Request (HARQ) feedback received in the first time slot, and The second HARQ feedback received in the second time slot.

13. The method of claim 12, wherein determining the competition window adjustment based at least in part on the first HARQ feedback and the second HARQ feedback comprises: The competition window adjustment is determined at least in part based on a soft combination of the first HARQ feedback and the second HARQ feedback.

14. The method of claim 12, wherein determining the competition window adjustment based at least in part on the first HARQ feedback and the second HARQ feedback comprises: Determine the percentage of negative acknowledgments (NACKs) in the combination of the first HARQ feedback and the second HARQ feedback; as well as Determine whether the NACK percentage meets the percentage threshold.

15. The method of claim 14, wherein determining the competition window adjustment based at least in part on the first HARQ feedback and the second HARQ feedback comprises: Determine that the NACK percentage meets the percentage threshold; as well as The size of the contention window for the Listen-Before-Speak (LBT) process on the side link is increased, at least in part, based on determining that the NACK percentage meets the percentage threshold.

16. The method of claim 14, wherein determining the competition window adjustment based at least in part on the first HARQ feedback and the second HARQ feedback comprises: It is determined that the NACK percentage does not meet the percentage threshold; as well as At least in part, this is based on determining that the NACK percentage meets the percentage threshold, to avoid increasing the size of the contention window for the Listen-After-Speak (LBT) process on the side link.

17. The method of claim 14, wherein determining the NACK percentage comprises: The NACK percentage is determined using the same weighting applied to both the first and second HARQ feedbacks.

18. The method of claim 14, wherein determining the NACK percentage comprises: The NACK percentage is determined using a first weighting for the first HARQ feedback and a second weighting for the second HARQ feedback.

19. The method according to claim 18, further comprising: The first weighting for the first HARQ feedback is determined at least in part based on the number of reference symbols used to determine the transport block size transmitted by the first side link.

20. The method according to claim 18, further comprising: The first weighting for the first HARQ feedback is determined at least in part based on whether the difference between the number of reference symbols used to determine the transport block size transmitted by the first side link and the number of symbols used to transmit by the first side link satisfies a threshold.

21. A user equipment (UE) for wireless communication, the user equipment (UE) comprising: Memory; and One or more processors, said one or more processors being coupled to the memory and configured to: During the Channel Occupied Time (COT) on the side link, a first side link transmission is transmitted starting at a second start symbol candidate, which appears after a first start symbol candidate that appears at the beginning of a first time slot in the COT; During the COT on this side link, a second side link transmission is sent, which spans the duration of the second time slot that occurs after the first time slot in the COT; as well as The contention window adjustment is determined at least in part based on the Hybrid Automatic Repeat Request (HARQ) feedback received for the second time slot.

22. The UE according to claim 21, wherein, To determine the contention window adjustment, the one or more processors are configured to: The end of the second time slot is marked as the end of the reference duration of the competition window adjustment; as well as The competition window adjustment is determined at least in part based on the reference duration.

23. The UE according to claim 21, wherein, To determine the contention window adjustment, the one or more processors are configured to: The contention window adjustment is determined at least in part based on the HARQ feedback received for the second time slot rather than on the HARQ feedback received for the first time slot.

24. The UE according to claim 21, wherein, To determine the contention window adjustment, the one or more processors are configured to: The size of the contention window for the Listen-Before-Speak (LBT) process on the side link is increased, at least in part, based on the negative acknowledgment (NACK) ratio of the HARQ feedback received for the second time slot.

25. A UE for wireless communication, the UE comprising: Memory; and One or more processors, said one or more processors being coupled to the memory and configured to: During the Channel Occupied Time (COT) on the side link, a first side link transmission is transmitted starting at a second start symbol candidate, which appears after a first start symbol candidate that appears at the beginning of a first time slot in the COT; During the COT on this side link, a second side link transmission is sent, which spans the duration of the second time slot that occurs after the first time slot in the COT; as well as The competition window adjustment is determined at least in part based on the following: In response to the first Hybrid Automatic Repeat Request (HARQ) feedback received in the first time slot, or The second HARQ feedback received in the second time slot.

26. The UE according to claim 25, wherein, To determine the contention window adjustment, the one or more processors are configured to: The first HARQ feedback is used to determine the competition window adjustment; At least in part, based on the determination to use the first HARQ feedback, the end of the first time slot is marked as the end of the reference duration of the contention window adjustment; as well as The competition window adjustment is determined at least in part based on the reference duration.

27. The UE according to claim 26, wherein, To determine the contention window adjustment, the one or more processors are configured to: The contention window adjustment is determined at least in part based on the first HARQ feedback received for the first time slot, rather than based on the second HARQ feedback received for the second time slot.

28. The UE according to claim 25, wherein, To determine the contention window adjustment, the one or more processors are configured to: It is determined that the second HARQ feedback will be used to determine the competition window adjustment; At least in part, based on the determination to use the second HARQ feedback, the end of the second time slot is identified as the reference duration for the contention window adjustment; as well as The competition window adjustment is determined at least in part based on the reference duration.

29. The UE according to claim 28, wherein, To determine the contention window adjustment, the one or more processors are configured to: The contention window adjustment is determined at least in part based on the second HARQ feedback received for the second time slot, rather than based on the first HARQ feedback received for the second time slot.

30. The UE according to claim 25, wherein, To determine contention window adjustments, the one or more processors are configured to: The difference between the number of reference symbols used to determine the transport block size transmitted by the first side link and the number of symbols used to transmit by the first side link satisfies a threshold. as well as The contention window adjustment is determined at least in part based on determining that the difference satisfies the threshold, and at least in part based on the second HARQ feedback received for the second time slot.

31. The UE according to claim 25, wherein, To determine contention window adjustments, the one or more processors are configured to: The difference between the number of reference symbols used to determine the transport block size transmitted by the first side link and the number of symbols used to transmit by the first side link does not meet the threshold. as well as The contention window adjustment is determined at least in part based on the determination that the difference does not meet the threshold, and at least in part based on the first HARQ feedback received for the first time slot.

32. A UE for wireless communication, the UE comprising: Memory; and One or more processors, said one or more processors being coupled to the memory and configured to: During the Channel Occupied Time (COT) on the side link, a first side link transmission is transmitted starting at a second start symbol candidate, which appears after a first start symbol candidate that appears at the beginning of a first time slot in the COT; During the COT on this side link, a second side link transmission is sent, which spans the duration of the second time slot that occurs after the first time slot in the COT; as well as The competition window adjustment is determined at least in part based on the following: In response to the first Hybrid Automatic Repeat Request (HARQ) feedback received in the first time slot, and The second HARQ feedback received in the second time slot.

33. The UE according to claim 32, wherein, In order to determine the contention window adjustment based at least in part on the first HARQ feedback and the second HARQ feedback, the one or more processors are configured to: The competition window adjustment is determined at least in part based on a soft combination of the first HARQ feedback and the second HARQ feedback.

34. The UE according to claim 32, wherein, In order to determine the contention window adjustment based at least in part on the first HARQ feedback and the second HARQ feedback, the one or more processors are configured to: Determine the percentage of negative acknowledgments (NACKs) in the combination of the first HARQ feedback and the second HARQ feedback; and Determine whether the NACK percentage meets the percentage threshold.

35. The UE according to claim 34, wherein, In order to determine the contention window adjustment based at least in part on the first HARQ feedback and the second HARQ feedback, the one or more processors are configured to: Determine that the NACK percentage meets the percentage threshold; as well as The size of the contention window for the Listen-Before-Speak (LBT) process on the side link is increased, at least in part, based on determining that the NACK percentage meets the percentage threshold.

36. The UE according to claim 34, wherein, In order to determine the contention window adjustment based at least in part on the first HARQ feedback and the second HARQ feedback, the one or more processors are configured to: It is determined that the NACK percentage does not meet the percentage threshold; as well as At least in part, this is based on determining that the NACK percentage meets the percentage threshold, to avoid increasing the size of the contention window for the Listen-After-Speak (LBT) process on the side link.

37. The UE according to claim 34, wherein, To determine the NACK percentage, the one or more processors are configured to: The NACK percentage is determined using the same weighting applied to both the first and second HARQ feedbacks.

38. The UE according to claim 34, wherein, To determine the NACK percentage, the one or more processors are configured to: The NACK percentage is determined using a first weighting for the first HARQ feedback and a second weighting for the second HARQ feedback.

39. The UE of claim 38, wherein the one or more processors are further configured to: The first weighting for the first HARQ feedback is determined at least in part based on the number of reference symbols used to determine the transport block size transmitted by the first side link.

40. The UE of claim 38, wherein the one or more processors are further configured to: The first weighting for the first HARQ feedback is determined at least in part based on whether the difference between the number of reference symbols used to determine the transport block size transmitted by the first side link and the number of symbols used to transmit by the first side link satisfies a threshold.

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