Sensing structure and prioritization in channel occupancy time sharing for sidelink in unlicensed spectrum

Abstract

Aspects of the present disclosure generally relate to wireless communications. In some aspects, a first user equipment (UE) may receive a channel occupancy time (COT) sharing indication from a second UE. The first UE may determine whether the COT is associated with a first channel access type associated with aligning sidelink transmissions across the group of UEs or a second channel access type associated with aligning sidelink transmissions across the group of UEs. And the second channel access type is associated with determining a transmission start point for sidelink communication based at least in part on a priority associated with the first UE. A first UE may attempt to transmit sidelink communications at a transmission start point. Numerous other aspects are described.

Description

Technical Field

[0001] Aspects of the present disclosure generally relate to wireless communications and techniques and apparatus for sensing structure and prioritization in channel occupancy time (COT) sharing for sidelinks in unlicensed spectrum. Background Art

[0002] Wireless communication systems are widely deployed to provide a variety of telecommunication services, such as telephony, video, data, messaging, and broadcasting. Typical wireless communication systems may utilize multiple access technologies that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and long term evolution (LTE). LTE / LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP).

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

[0004] The above-mentioned multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different UEs to communicate at a city, country, region and / or global level. New Radio (NR) (which may be referred to as 5G) is an enhancement set of the LTE mobile standard released by 3GPP. NR is designed to better integrate with other open standards by improving spectrum efficiency, reducing costs, improving services, utilizing new spectrum, and using orthogonal frequency division multiplexing (OFDM) (CP-OFDM) with cyclic prefix (CP) on the downlink, using CP-OFDM and / or single carrier frequency division multiplexing (SC-FDM) (also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink, and supporting beamforming, multiple input multiple output (MIMO) antenna technology and carrier aggregation, so as to better support mobile broadband Internet access. As the demand for mobile broadband access continues to increase, further improvements to LTE, NR and other radio access technologies are still useful. Summary of the invention

[0005] In some aspects, a method of wireless communication performed by an apparatus of a first user equipment (UE) may include: receiving a channel occupancy time (COT) sharing indication from a second UE; determining whether the COT is associated with a first channel access type or a second channel access type based at least in part on receiving the COT sharing indication, wherein the first channel access type is associated with a sidelink transmission aligned across a group of UEs, and wherein the second channel access type is associated with a transmission starting point for sidelink communication determined at least in part based on a priority associated with the first UE; and attempting to send the sidelink communication at the transmission starting point, wherein the transmission starting point corresponds to a common starting point utilized by the group of UEs based at least in part on the COT being associated with the first channel access type, or wherein the transmission starting point is selected from one or more transmission starting points in the COT based at least in part on the COT being associated with the second channel access type.

[0006] In some aspects, a method of wireless communication performed by an apparatus of a first UE may include: acquiring a COT; and sending a COT sharing indication to a second UE group to enable the second UE group to utilize a portion of the COT, wherein the COT sharing indication is used to indicate whether the COT is associated with a first channel access type or a second channel access type, wherein the first channel access type is associated with sidelink transmissions aligned across UE groups, and wherein the second channel access type is associated with determining a transmission start point for sidelink communication based at least in part on a priority associated with the first UE.

[0007] In some aspects, a first UE for wireless communication includes a memory and one or more processors coupled to the memory, the one or more processors being configured to: receive a COT sharing indication from a second UE; determine whether the COT is associated with a first channel access type or a second channel access type based at least in part on receiving the COT sharing indication, wherein the first channel access type is associated with a sidelink transmission aligned across a UE group, and wherein the second channel access type is associated with a transmission starting point for sidelink communication determined at least in part based on a priority associated with the first UE; and attempt to send the sidelink communication at the transmission starting point, wherein the transmission starting point corresponds to a common starting point utilized by the UE group based at least in part on the COT being associated with the first channel access type, or wherein the transmission starting point is selected from one or more transmission starting points in the COT based at least in part on the COT being associated with the second channel access type.

[0008] In some aspects, a first UE for wireless communication includes a memory and one or more processors coupled to the memory, the one or more processors being configured to: obtain a COT; and send a COT sharing indication to a second UE group to enable the second UE group to utilize a portion of the COT, wherein the COT sharing indication is used to indicate whether the COT is associated with a first channel access type or a second channel access type, wherein the first channel access type is associated with sidelink transmissions aligned across UE groups, and wherein the second channel access type is associated with determining a transmission start point for sidelink communication based at least in part on a priority associated with the first UE.

[0009] In some aspects, a non-transitory computer-readable medium storing an instruction set for wireless communication includes one or more instructions that, when executed by one or more processors of a first UE, cause the first UE to: receive a COT sharing indication from a second UE; determine whether the COT is associated with a first channel access type or a second channel access type based at least in part on receiving the COT sharing indication, wherein the first channel access type is associated with a sidelink transmission aligned across a group of UEs, and wherein the second channel access type is associated with determining a transmission starting point for sidelink communication based at least in part on a priority associated with the first UE; and attempt to send sidelink communication at the transmission starting point, wherein the transmission starting point corresponds to a common starting point utilized by the group of UEs based at least in part on the COT being associated with the first channel access type, or wherein the transmission starting point is selected from one or more transmission starting points in the COT based at least in part on the COT being associated with the second channel access type.

[0010] In some aspects, a non-transitory computer-readable medium storing an instruction set for wireless communication includes one or more instructions that, when executed by one or more processors of a first UE, cause the first UE to: acquire a COT; and send a COT sharing indication to a second UE group to enable the second UE group to utilize a portion of the COT, wherein the COT sharing indication is used to indicate whether the COT is associated with a first channel access type or a second channel access type, wherein the first channel access type is associated with sidelink transmissions aligned across UE groups, and wherein the second channel access type is associated with determining a transmission start point for sidelink communication based at least in part on a priority associated with the first UE.

[0011] In some aspects, a first device for wireless communication includes a unit for receiving a COT sharing indication from a second device; a unit for determining whether the COT is associated with a first channel access type or a second channel access type based at least in part on receiving the COT sharing indication, wherein the first channel access type is associated with sidelink transmissions aligned across a group of devices, and wherein the second channel access type is associated with a transmission starting point for sidelink communication determined at least in part based on a priority associated with the first device; and a unit for attempting to send the sidelink communication at the transmission starting point, wherein the transmission starting point corresponds to a common starting point utilized by the group of devices based at least in part on the COT being associated with the first channel access type, or wherein the transmission starting point is selected from one or more transmission starting points in the COT based at least in part on the COT being associated with the second channel access type.

[0012] In some aspects, a first device for wireless communication includes: a unit for acquiring a COT; and a unit for sending a COT sharing indication to a second UE group to enable the second UE group to utilize a portion of the COT, wherein the COT sharing indication is used to indicate whether the COT is associated with a first channel access type or a second channel access type, wherein the first channel access type is associated with sidelink transmissions aligned across the device group, and wherein the second channel access type is associated with determining a transmission start point for sidelink communication based at least in part on a priority associated with the first UE.

[0013] The various aspects generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, network entities, network nodes, wireless communication devices and / or processing systems as fully described herein with reference to and as illustrated by the accompanying drawings and description.

[0014] The features and technical advantages of the examples according to the present disclosure have been outlined quite extensively above in order to better understand the specific embodiments that follow. Additional features and advantages will be described below. The disclosed concepts and specific examples can be easily used as the basis for modifying or designing other structures for the same purpose of achieving the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. When considered in conjunction with the accompanying drawings, the characteristics of the concepts disclosed herein (both their organization and method of operation) and the associated advantages will be better understood according to the following description. Each of the figures in the accompanying drawings is provided for the purpose of illustration and description and is not intended to be a definition of the limitations of the claims.

[0015] Although various aspects are described in the present disclosure by illustrating some examples, it will be understood by those skilled in the art that such aspects can be implemented in many different arrangements and scenarios. The technology described herein can be implemented using different platform types, devices, systems, shapes, sizes and / or packaging arrangements. For example, some aspects can be implemented via integrated chip embodiments or other devices based on non-module components (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / purchasing devices, medical devices, and / or artificial intelligence devices). Various 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. The equipment 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 (e.g., hardware components, including antennas, radio frequency (RF) chains, power amplifiers, modulators, buffers, processors, interleavers, adders and / or summers) for analog and digital purposes. The various aspects described herein are intended to be practiced in various devices, components, systems, distributed arrangements and / or end-user devices of different sizes, shapes and configurations. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to understand the above-mentioned features of the present disclosure in detail, a more specific description of the invention briefly summarized above can be obtained by referring to various aspects (some of which are shown in the accompanying drawings). However, it should be noted that the accompanying drawings only illustrate certain typical aspects of the present disclosure and are therefore not considered to be limiting of its scope, as the specification may recognize other equally effective aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0017] Figure 1 is a diagram illustrating an example of a wireless network according to the present disclosure.

[0018] Figure 2is a diagram illustrating an example of a network node communicating with a user equipment (UE) in a wireless network according to the present disclosure.

[0019] Figure 3 is a diagram illustrating an example of sidelink communications according to the present disclosure.

[0020] Figure 4A and Figure 4B is a diagram showing an example of sidelink communication and access link communication according to the present disclosure.

[0021] Figure 5-9 is a diagram illustrating one or more examples of sensing structure and prioritization in channel occupancy time (COT) sharing in an unlicensed spectrum in accordance with various aspects of the present disclosure.

[0022] Fig.10 and Fig.11 is a diagram illustrating an example process associated with sensing structure and prioritization in COT sharing in unlicensed spectrum in accordance with the present disclosure.

[0023] Fig.12 and Fig.13 is a diagram of an example apparatus for wireless communications in accordance with the present disclosure. DETAILED DESCRIPTION

[0024] The various aspects of the present disclosure are described more fully below with reference to the accompanying drawings. However, the present disclosure can be embodied in many different forms, and should not be construed as being limited to any specific structure or function presented throughout the present disclosure. Specifically, these aspects are provided so that the present disclosure will be thorough and complete, and the scope of the present disclosure will be fully conveyed to those skilled in the art. It should be understood by a person skilled in the art that the scope of the present disclosure is intended to cover any aspect of the present disclosure disclosed herein, whether the aspect is implemented independently of any other aspect of the present disclosure or implemented in combination with any other aspect. For example, any number of aspects set forth herein can be used to implement a device or practice method. In addition, the scope of the present disclosure is intended to cover such a device or method that is practiced using other structures, functions, or structures and functions other than the various aspects of the disclosure set forth herein or different from the various aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein can be embodied by one or more elements of the claims.

[0025] Several aspects of telecommunication systems will now be presented with reference to various devices and techniques. These devices and methods will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements may be implemented using hardware, software, or a combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0026] Although various aspects may be described herein using terms generally associated with 5G or new radio (NR) radio access technologies (RATs), various aspects of the present disclosure may be applied to other RATs, such as 3G RATs, 4G RATs, and / or post-5G RATs (e.g., 6G).

[0027] Figure 1 1 is a diagram illustrating an example of a wireless network 100 according to the present disclosure. The wireless network 100 may be or may include elements of a 5G (e.g., NR) network and / or a 4G (e.g., Long Term Evolution (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), a user equipment (UE) 120 or multiple UEs 120 (shown as UE 120a, UE 120b, UE 120c, UE 120d, and UE 120e), and / or other network entities. The network node 110 is a network node that communicates with the UE 120. As shown, the network node 110 may include one or more network nodes. For example, the network node 110 may be a converged network node, meaning that the converged 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, the network node 110 may be a disaggregated network node (sometimes referred to as a disaggregated base station), meaning that the network node 110 is configured to utilize a protocol stack that is physically or logically distributed between 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).

[0028] In some examples, the network node 110 is or includes a network node (such as a RU) that communicates with the UE 120 via a radio access link. In some examples, the network node 110 is or includes a network node that communicates with other network nodes 110 via a fronthaul link or a midhaul link, such as a DU. In some examples, the network node 110 is or includes a network node that communicates with other network nodes 110 via a midhaul link or communicates with the core network via a backhaul link, such as a CU. In some examples, the network node 110 (such as an aggregated network node 110 or a 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. The network node 110 may include, for example, an NR base station, an LTE base station, a Node B, an eNB (for example, in 4G), a gNB (for example, in 5G), an access point, a transmit receive point (TRP), a DU, a RU, a CU, a mobility element of a network, a core network node, a network element, a network device, a RAN node, or a combination thereof. In some examples, network nodes 110 may be interconnected to each other or to one or more other network nodes 110 in wireless network 100 via various types of fronthaul interfaces, midhaul interfaces, and / or backhaul interfaces (e.g., direct physical connections, air interfaces, or virtual networks) using any suitable transport network.

[0029] In some examples, the network node 110 may provide communication coverage for a specific geographic area. In the Third Generation Partnership Project (3GPP), the term "cell" may refer to a coverage area of ​​the network node 110 and / or a network node subsystem serving the coverage area, depending on the context in which the term is used. The network node 110 may provide communication coverage for a macro cell, a pico cell, a femto cell, and / or another type of cell. A macro cell may cover a relatively large geographic area (e.g., a radius of several kilometers) and may allow unrestricted access by a UE 120 with a service subscription. A pico cell may cover a relatively small geographic area and may allow unrestricted access by a UE 120 with a service subscription. A femto cell may cover a relatively small geographic area (e.g., a residence) and may allow restricted access by a UE 120 with an association with a femto cell (e.g., a UE 120 in a closed subscriber group (CSG)). A network node 110 for a macro cell may be referred to as a macro network node. A network node 110 for a pico cell may be referred to as a pico network node. The network node 110 for a femto cell may be referred to as a femto network node or an in-home network node. Figure 1In the example shown in , network node 110a may be a macro network node for macro cell 102a, network node 110b may be a pico network node for pico cell 102b, and network node 110c may be a femto network node for femto cell 102c. A network node may support one or more (e.g., three) cells. In some examples, a cell may not necessarily be stationary, and the geographic area of ​​a cell may move depending on the location of a mobile network node 110 (e.g., a mobile network node).

[0030] 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, a "base station" or "network node" may refer to a CU, a DU, a 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 the 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 a plurality of different devices (which may be located in the same geographic location or in different geographic locations) may be configured to perform at least a portion of a function, or to replicate the execution of at least a portion of a 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 may be instantiated on a single device. In some aspects, the term "base station" or "network node" may refer to one of the base station functions but not the other. In this way, a single device may include more than one base station.

[0031] The wireless network 100 may include one or more relay stations. A relay station is a network node that can receive transmissions of data from an upstream node (e.g., a network node 110 or a UE 120) and send transmissions of data to a downstream node (e.g., a UE 120 or a network node 110). A relay station may be a UE 120 that can relay transmissions for other UEs 120. Figure 1In the example shown in , a network node 110d (e.g., a relay network node) can communicate with a network node 110a (e.g., a macro network node) and a UE 120d to facilitate communication between the network node 110a and the UE 120d. A network node 110 that relays communications may be referred to as a relay station, a relay base station, a relay network node, a relay node, a relay, etc.

[0032] The wireless network 100 may be a heterogeneous network including different types of network nodes 110, such as macro network nodes, pico network nodes, femto network nodes, and relay network nodes, etc. These different types of network nodes 110 may have different transmit power levels, different coverage areas, and / or different impacts on interference in the wireless network 100. For example, a macro network node may have a high transmit power level (e.g., 5 to 40 watts), while a pico network node, a femto network node, and a relay network node may have a lower transmit power level (e.g., 0.1 to 2 watts).

[0033] The network controller 130 may be coupled to or communicate with a set of network nodes 110 and may provide coordination and control for these network nodes 110. The network controller 130 may communicate with the network nodes 110 via a backhaul communication link or a mid-range communication link. The network nodes 110 may communicate directly with each other or indirectly via a wireless or wired backhaul communication link. In some aspects, the network controller 130 may be a CU or a core network device, or may include a CU or a core network device.

[0034] UE 120 can be dispersed throughout the wireless network 100, and each UE 120 can be fixed or mobile. UE 120 can include, for example, access terminals, terminals, mobile stations, and / or subscriber units. UE 120 can be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet device, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device, a biometric device, a wearable device (e.g., a smart watch, smart clothing, smart glasses, a smart wristband, smart jewelry (e.g., a smart ring or a smart bracelet)), an entertainment device (e.g., a music device, a video device, and / or a satellite radio unit, etc.), a vehicle component or sensor, a smart meter / sensor, an industrial manufacturing device, a global positioning system device, a UE function of a network node, and / or any other suitable device configured to communicate via a wireless or wired medium.

[0035] Some UEs 120 may be considered as 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, which may communicate with a network node, another device (e.g., a remote device), or some other entity. Some UEs 120 may be considered as Internet of Things (IoT) devices, and / or may be implemented as NB-IoT (narrowband IoT) devices. Some UEs 120 may be considered as user premises equipment. UE 120 may be included inside a housing that houses components of UE 120, such as a processor component and / or a memory component. In some examples, the processor component and the memory component may be coupled together. For example, a processor component (e.g., one or more processors) and a memory component (e.g., a memory) may be operationally coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0036] In general, any number of wireless networks 100 may be deployed in a given geographic area. Each wireless network 100 may support a specific RAT and may operate on one or more frequencies. RAT may also be referred to as a radio technology, an air interface, etc. Frequency may also be referred to as a carrier, a frequency channel, etc. Each frequency may support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.

[0037] In some examples, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) can communicate directly using one or more sidelink channels (e.g., without using network node 110 as an intermediary for mutual communication). For example, UE 120 can communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocol (e.g., which may include vehicle-to-vehicle (V2V) protocol, vehicle-to-infrastructure (V2I) protocol, or vehicle-to-pedestrian (V2P) protocol), and / or mesh network. In such examples, UE 120 can perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by network node 110.

[0038] The devices of the wireless network 100 can communicate using an electromagnetic spectrum, which can be subdivided into various categories, frequency bands, channels, etc. according to frequency or wavelength. For example, the devices of the wireless network 100 can communicate using one or more operating frequency bands. In 5GNR, two initial operating frequency bands have been identified as frequency range names FR1 (410 MHz–7.125 GHz) and FR2 (24.25 GHz–52.6 GHz). It should be understood that although a portion of FR1 is greater than 6 GHz, FR1 is often referred to (interchangeably) as a “sub-6 GHz” band in various documents and articles. Similar naming issues sometimes occur with respect to FR2, where, although different from the extremely high frequency (EHF) band (30 GHz-300 GHz) identified as a “millimeter wave” band by the International Telecommunication Union (ITU), FR2 is often (interchangeably) referred to as a “millimeter wave” band in documents and articles.

[0039] Frequencies between FR1 and FR2 are generally referred to as mid-band frequencies. Recent 5G NR research has identified the operating bands for these mid-band frequencies as the frequency range name FR3 (7.125GHz–24.25GHz). The bands falling within FR3 can inherit FR1 characteristics and / or FR2 characteristics, and therefore the features of FR1 and / or FR2 can be effectively extended to mid-band frequencies. In addition, higher frequency bands are currently being explored to extend 5G NR operations beyond 52.6GHz. For example, three higher operating bands have been identified as frequency range names FR4a or FR4-1 (52.6GHz–71GHz), FR4 (52.6GHz–114.25GHz), and FR5 (114.25GHz–300GHz). Each of these higher frequency bands falls within the EHF band.

[0040] Considering the above examples, unless otherwise explicitly stated, it should be understood that the term "sub-6 GHz" or the like (if used herein) can broadly represent frequencies that can be lower than 6 GHz, frequencies that can be within FR1, or can include mid-band frequencies. In addition, unless otherwise explicitly stated, it should be understood that the term "millimeter wave" or the like (if used herein) can broadly represent frequencies that can include mid-band frequencies, frequencies that can be within FR2, FR4, FR4-a or FR4-1 and / or FR5, or frequencies that can be within the EHF band. It is expected that the frequencies included in these operating bands (e.g., FR1, FR2, FR3, FR4, FR4-a, FR4-1, and / or FR5) can be modified, and the techniques described herein are applicable to those modified frequency ranges.

[0041] In some aspects, the UE 120 may include a communication manager 140. As described in more detail elsewhere herein, the communication manager 140 may perform one or more operations associated with sensing structure and prioritization in channel occupancy time (COT) sharing for a sidelink in an unlicensed spectrum. For example, the communication manager 140 may receive a COT sharing indication from a second UE; determine whether the COT is associated with a first channel access type or a second channel access type based at least in part on receiving the COT sharing indication, wherein the first channel access type is associated with a sidelink transmission aligned across a group of UEs, and wherein the second channel access type is associated with determining a transmission start point for sidelink communication based at least in part on a priority associated with the first UE; and attempt to send the sidelink communication at the transmission start point, wherein the transmission start point corresponds to a common start point utilized by the group of UEs based at least in part on the COT being associated with the first channel access type, or wherein the transmission start point is selected from one or more transmission start points in the COT based at least in part on the COT being associated with the second channel access type. Additionally or alternatively, the communication manager 140 may perform one or more other operations described herein.

[0042] As indicated above, Figure 1 are provided as examples. Other examples may differ from those regarding Figure 1 As described.

[0043] Figure 2 2 is a diagram illustrating an example 200 of a network node 110 communicating with a UE 120 in a wireless network 100 according to the present disclosure. The network node 110 may be equipped with a set of antennas 234a to 234t, such as T antennas (T≥1). The UE 120 may be equipped with a set of antennas 252a to 252r, such as R antennas (R≥1). The network node 110 of example 200 includes one or more radio frequency components, such as an antenna 234 and a modem 254. In some examples, the network node 110 may include an interface, a communication component, or another component that facilitates communication with the UE 120 or another network node. Some network nodes 110 may not include radio frequency components that facilitate direct communication with the UE 120, such as one or more CUs or one or more DUs.

[0044] At the network node 110, a transmit processor 220 may receive data intended for a UE 120 (or a set of UEs 120) from a data source 212. The transmit processor 220 may select one or more modulation and coding schemes (MCS) for the UE 120 based at least in part on one or more channel quality indicators (CQIs) received from the UE 120. The network node 110 may process (e.g., encode and modulate) the data for the UE 120 based at least in part on the MCS selected for the UE 120, and provide data symbols for the UE 120. The transmit processor 220 may 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. The transmit processor 220 may 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 signals (PSS) or secondary synchronization signals (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols (if applicable), and may provide 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 may be provided to a modulator component (shown as MOD) of the modem 232. Each modem 232 may process a corresponding output symbol stream (e.g., for OFDM) using a corresponding modulator component to obtain an output sample stream. Each modem 232 may further process (e.g., convert to analog, amplify, filter, and / or upconvert) the output sample stream using a corresponding modulator component to obtain a downlink signal. The modems 232a through 232t may transmit a set of downlink signals (eg, T downlink signals) via a corresponding set of antennas 234 (eg, T antennas) (shown as antennas 234a through 234t).

[0045] At the UE 120, a set of antennas 252 (shown as antennas 252a to 252r) may receive downlink signals from the network node 110 and / or other network nodes 110, and may 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 may be provided to a demodulator component (shown as DEMOD) of the modem 254. Each modem 254 may use a corresponding demodulator component to condition (e.g., filter, amplify, downconvert, and / or digitize) the received signal to obtain input samples. Each modem 254 may use a demodulator component to further process the input samples (e.g., for OFDM) to obtain received symbols. A MIMO detector 256 may obtain received symbols from the modem 254, may perform MIMO detection on the received symbols (if applicable), and may provide detected symbols. The receive processor 258 may process (e.g., demodulate and decode) detected symbols, may provide decoded data for the UE 120 to the data sink 260, and may provide decoded control information and system information to the controller / processor 280. The term "controller / processor" may refer to one or more controllers, one or more processors, or a combination thereof. The channel processor may determine a reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, and / or a CQI parameter, among other things. In some examples, one or more components of the UE 120 may be included in the housing 284.

[0046] The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292. For example, the network controller 130 may include one or more devices in a core network. The network controller 130 may communicate with the network node 110 via the communication unit 294.

[0047] One or more antennas (e.g., antennas 234a to 234t and / or antennas 252a to 252r) may include or 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 (in a single housing or multiple housings), sets of coplanar antenna elements, sets of non-coplanar antenna elements, and / or be coupled to one or more transmit and / or receive components (e.g., Figure 2One or more antenna elements of one or more components in.

[0048] On the uplink, at the UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information from a controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, and / or CQI). The transmit processor 264 may generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266 (if applicable), further processed by a modem 254 (e.g., for DFT-s-OFDM or CP-OFDM), and sent to the network node 110. In some examples, the modem 254 of the UE 120 may include a modulator and a demodulator. In some examples, the UE 120 includes a transceiver. The transceiver may include any combination of antenna(s) 252, modem(s) 254, MIMO detector 256, receive processor 258, transmit processor 264, and / or TX MIMO processor 266. The transceiver may be used by a processor (eg, controller / processor 280) and memory 282 to perform the functions described herein (eg, with reference to Figure 5-Figure 13 ) or any aspects of any of the methods described herein.

[0049] At the network node 110, uplink signals from the UE 120 and / or other UEs may be received by an antenna 234, processed by a modem 232 (e.g., a demodulator component of the modem 232 shown as DEMOD), detected by a MIMO detector 236 (if applicable), and further processed by a receive processor 238 to obtain decoded data and control information sent by the UE 120. The receive processor 238 may provide the decoded data to a data sink 239 and provide the decoded control information to a controller / processor 240. The network node 110 may include a communication unit 244 and may communicate with the network controller 130 via the communication unit 244. The network node 110 may include a scheduler 246 to schedule one or more UEs 120 for uplink and / or downlink communications. In some examples, the modem 232 of the network node 110 may include a modulator and a demodulator. In some examples, the network node 110 includes a transceiver. The transceiver may include any combination of antenna(s) 234, modem(s) 232, MIMO detector 236, receive processor 238, transmit processor 220, and / or TX MIMO processor 230. The transceiver may be used by a processor (e.g., controller / processor 240) and memory 242 to perform the functions described herein (e.g., with reference to Figure 5-Figure 13) or any aspects of any of the methods described herein.

[0050] The controller / processor 240 of the network node 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component of the may perform one or more techniques associated with sensing structure and prioritization in COT sharing for sidelink in unlicensed spectrum, as described in more detail elsewhere herein. For example, the controller / processor 240 of the network node 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component in may perform or direct e.g. Fig.10 The process of 1000 Fig.11 1100 and / or other processes as described herein. Memory 242 and memory 282 may store data and program codes 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, or after compilation, conversion, and / or interpretation), may cause one or more processors, UE 120, and / or network node 110 to perform or direct, for example, Fig.10 The process of 1000 Fig.11 The process 1100 and / or operations of other processes as described herein. In some examples, executing instructions may include running instructions, converting instructions, compiling instructions, and / or interpreting instructions, etc.

[0051] In some aspects, UE 120 may include: a unit for receiving a COT sharing indication from a second UE; a unit for determining whether the COT is associated with a first channel access type or a second channel access type based at least in part on receiving the COT sharing indication, wherein the first channel access type is associated with sidelink transmissions aligned across a group of UEs, and wherein the second channel access type is associated with determining a transmission starting point for sidelink communications based at least in part on a priority associated with the first UE; a unit for attempting to send the sidelink communication at a transmission starting point, wherein the transmission starting point corresponds to a common starting point utilized by the group of UEs based at least in part on the COT being associated with the first channel access type, or wherein the transmission starting point is selected from one or more transmission starting points in the COT based at least in part on the COT being associated with the second channel access type. In some aspects, such a unit may include a combination of Figure 2One or more components of UE 120 are depicted, such as controller / processor 280, transmit processor 264, TX MIMO processor 266, antenna 252, modem 254, MIMO detector 256, receive processor 258, etc.

[0052] In some aspects, UE 120 may include: means for acquiring a COT; means for sending a COT sharing indication to a second UE group to enable the second UE group to utilize a portion of the COT, wherein the COT sharing indication is used to indicate whether the COT is associated with a first channel access type or a second channel access type, wherein the first channel access type is associated with sidelink transmissions aligned across the UE group, and wherein the second channel access type is associated with determining a transmission start point for sidelink communications based at least in part on a priority associated with the first UE. In some aspects, such means may include combining Figure 2 One or more components of UE 120 are depicted, such as controller / processor 280, transmit processor 264, TX MIMO processor 266, antenna 252, modem 254, MIMO detector 256, receive processor 258, etc.

[0053] Although Figure 2 The blocks in the 200 and 210 are shown as distinct components, but the functionality described above with respect to these blocks may be implemented in a single hardware, software, or combined component, or in various combinations of components. For example, the functionality described with respect to the transmit processor 264, the receive processor 258, and / or the TX MIMO processor 266 may be performed by or under the control of the controller / processor 280.

[0054] As indicated above, Figure 2 are provided as examples. Other examples may differ from those regarding Figure 2 As described.

[0055] The deployment of a communication system (such as a 5G NR system) can be arranged in a variety of ways using various components or components. In a 5GNR system or network, a network node, a network entity, a mobility element of the network, a RAN node, a core network node, a network element, a base station or a network device can be implemented in an aggregated or decomposed architecture. For example, a base station (such as a node B (NB), an evolved NB (eNB), an NR BS, a 5G NB, an access point (AP), a TRP or a cell, etc.), or one or more units (or one or more components) that perform base station functions can be implemented as an aggregated base station (also referred to as an independent base station or a monolithic base station) or a decomposed base station. "Network entity" or "network node" may refer to a decomposed base station, or to one or more units of a decomposed base station (such as one or more CUs, one or more DUs, one or more RUs or a combination thereof).

[0056] An aggregated base station (e.g., an aggregated network node) 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 unit). A decomposed base station (e.g., a decomposed network node) can be configured to utilize a protocol stack that is physically or logically distributed between two or more units (such as one or more CUs, one or more DUs, or one or more RUs). In some examples, the CU can be implemented within a network node, and one or more DUs can be co-located with the CU, or alternatively, can be geographically or virtually distributed throughout one or more other network nodes. The DU can be implemented to communicate with one or more RUs. Each of the CU, DU, and RU can also be implemented as a virtual unit, such as a virtual central unit (VCU), a virtual distributed unit (VDU), or a virtual radio unit (VRU), etc.

[0057] Base station type operations or network designs may take into account the aggregated nature of base station functionality. For example, a decomposed base station may be used in an IAB network, an open radio access network (O-RAN (such as a network configuration advocated by the O-RAN Alliance)), or a virtualized radio access network (vRAN, also known as a cloud radio access network (C-RAN)) to facilitate the scaling of a communication system by separating base station functionality into one or more units that may be deployed separately. A decomposed base station may include functionality implemented across two or more units at various physical locations, as well as functionality implemented virtually for at least one unit, which may enable flexibility in network design. The various units of a decomposed base station may be configured for wired or wireless communication with at least one other unit of the decomposed base station.

[0058] Figure 3 is a diagram illustrating an example 300 of sidelink communications in accordance with the present disclosure.

[0059] like Figure 3 As shown in , the first UE 305-1 can communicate with the second UE 305-2 (and one or more other UEs 305) via one or more sidelink channels 310. UE 305-1 and 305-2 can use one or more sidelink channels 310 for P2P communication, D2D communication, V2X communication (e.g., which may include V2V communication, V2I communication and / or V2P communication) and / or mesh networking to communicate. In some aspects, UE 305 (e.g., UE 305-1 and / or UE 305-2) can correspond to one or more other UEs described elsewhere herein, such as UE 120. In some aspects, one or more sidelink channels 310 can use a PC5 interface and / or can operate in a high frequency band (e.g., 5.9 GHz band). Additionally or alternatively, UE 305 can use a global navigation satellite system (GNSS) timing to synchronize the timing of a transmission time interval (TTI) (e.g., a frame, subframe, time slot or symbol).

[0060] like Figure 3 As further shown in FIG. 1 , the one or more sidelink channels 310 may include a physical sidelink control channel (PSCCH) 315, a physical sidelink shared channel (PSSCH) 320, and / or a physical sidelink feedback channel (PSFCH) 325. The PSCCH 315 may be used to transmit control information, similar to a physical downlink control channel (PDCCH) and / or a physical uplink control channel (PUCCH) used for cellular communication with the network node 110 via an access link or access channel. The PSSCH 320 may be used to transmit data, similar to a physical downlink shared channel (PDSCH) and / or a physical uplink shared channel (PUSCH) used for cellular communication with the network node 110 via an access link or access channel. For example, the PSCCH 315 may carry sidelink control information (SCI) 330, which may indicate various control information for sidelink communication, such as one or more resources (e.g., time resources, frequency resources, and / or space resources), wherein a transport block (TB) 335 may be carried on the PSSCH 320. The TB 335 may include data. The PSFCH 325 may be used to transmit sidelink feedback 340, such as hybrid automatic repeat request (HARQ) feedback (eg, acknowledgement or negative acknowledgement (ACK / NACK) information), transmit power control (TPC), and / or scheduling request (SR).

[0061] Although shown on PSCCH 315, in some aspects SCI 330 may include multiple communications in different phases, such as a first phase SCI (SCI-1) and a second phase SCI (SCI-2). SCI-1 may be sent on PSCCH 315. SCI-2 may be sent on PSSCH 320. SCI-1 may include, for example, an indication of one or more resources (e.g., time resources, frequency resources, and / or space resources) on PSSCH 320, information for decoding sidelink communications on PSSCH, a quality of service (QoS) priority value, a resource reservation period, a PSSCH demodulation reference signal (DMRS) pattern, an SCI format for SCI-2, a beta offset for SCI-2, a number of PSSCH DMRS ports, and / or a modulation and coding scheme (MCS). SCI-2 may include information associated with data transmission on the PSSCH 320, such as a hybrid automatic repeat request (HARQ) process ID, a new data indicator (NDI), a source identifier, a destination identifier, and / or a channel state information (CSI) report trigger.

[0062] In some aspects, one or more sidelink channels 310 may use a resource pool. For example, a scheduling assignment (e.g., included in SCI 330) may be sent in a subchannel using specific resource blocks (RBs) across time. In some aspects, a data transmission associated with a scheduling assignment (e.g., on PSSCH 320) may occupy adjacent RBs in the same subframe as the scheduling assignment (e.g., using frequency division multiplexing). In some aspects, a scheduling assignment and associated data transmission are not sent on adjacent RBs.

[0063] In some aspects, the UE 305 may operate using a sidelink transmission mode (e.g., Mode 1) in which resource selection and / or scheduling are performed by the network node 110 (e.g., a base station, a CU, or a DU). For example, the UE 305 may receive a grant for sidelink channel access and / or scheduling from the network node 110 (e.g., directly or via one or more network nodes) (e.g., in downlink control information (DCI) or in a radio resource control (RRC) message, such as a grant for configuration). In some aspects, the UE 305 may operate using a transmission mode (e.g., Mode 2) in which resource selection and / or scheduling are performed by the UE 305 (e.g., instead of the network node 110). In some aspects, the UE 305 may perform resource selection and / or scheduling by sensing channel availability for transmission. For example, UE 305 may measure received signal strength indicator (RSSI) parameters associated with various sidelink channels (e.g., sidelink RSSI (S-RSSI) parameters), may measure reference signal received power (RSRP) parameters associated with various sidelink channels (e.g., PSSCH-RSRP parameters), and / or may measure reference signal received quality (RSRQ) parameters associated with various sidelink channels (e.g., PSSCH-RSRQ parameters), and may select a channel for transmission of sidelink communications based at least in part on the measurements.

[0064] Additionally or alternatively, the UE 305 may perform resource selection and / or scheduling using the SCI 330 received in the PSCCH 315, which may indicate occupied resources and / or channel parameters. Additionally or alternatively, the UE 305 may perform resource selection and / or scheduling by determining a channel busy rate (CBR) associated with various sidelink channels, which may be used for rate control (e.g., by indicating a maximum number of resource blocks that the UE 305 may use for a particular set of subframes).

[0065] In a transmission mode in which resource selection and / or scheduling is performed by the UE 305, the UE 305 may generate a sidelink grant and may send the grant in the SCI 330. The sidelink grant may indicate, for example, one or more parameters (e.g., transmission parameters) to be used for an upcoming sidelink transmission, such as one or more resource blocks (e.g., for TB 335) to be used for an upcoming sidelink transmission on the PSSCH 320, one or more subframes to be used for the upcoming sidelink transmission, and / or a modulation and coding scheme (MCS) to be used for the upcoming sidelink transmission. In some aspects, the UE 305 may generate a sidelink grant indicating one or more parameters for semi-persistent scheduling (SPS), such as a periodicity of the sidelink transmission. Additionally or alternatively, the UE 305 may generate a sidelink grant for event-driven scheduling, such as for an on-demand sidelink message.

[0066] As indicated above, Figure 3 are provided as examples. Other examples may differ from those regarding Figure 3 As described.

[0067] Figure 4A and 4B is a diagram illustrating an example 400 of sidelink and access link communications in accordance with the present disclosure.

[0068] As shown in FIG. 4 , a transmitter (Tx) / receiver (Rx) UE 405 and an Rx / Tx UE 410 may communicate with each other via a side link, as described above in conjunction with Figure 3 As further shown, in some sidelink modes, the network node 110 can communicate with the Tx / Rx UE 405 (e.g., directly or via one or more network nodes), such as via a first access link. Additionally or alternatively, in some sidelink modes, the network node 110 can communicate with the Rx / Tx UE 410 (e.g., directly or via one or more network nodes), such as via a first access link. The Tx / Rx UE 405 and / or the Rx / Tx UE 410 can correspond to one or more UEs described elsewhere herein, such as Figure 1120. Thus, a direct link between UEs 120 (e.g., via a PC5 interface) may be referred to as a sidelink, and a direct link between network node 110 and UE 120 (e.g., via a Uu interface) may be referred to as an access link. Sidelink communications may be sent via a sidelink, and access link communications may be sent via an access link. Access link communications may be downlink communications (from network node 110 to UE 120) or uplink communications (from UE 120 to network node 110). Furthermore, in some aspects, sidelink communications may be sent via a sidelink, and / or access link communications may be sent via an access link, in a licensed radio frequency (RF) spectrum, an unlicensed RF spectrum, and / or any suitable combination thereof.

[0069] For example, in order to adapt to the growing business needs, various efforts have been made to improve the spectrum efficiency in wireless networks and thereby increase network capacity (e.g., via the use of higher-order modulation, advanced MIMO antenna technology, multi-cell coordination technology, etc.). Another possible way to improve network capacity is to expand the system bandwidth. However, the available spectrum in the lower frequency bands that have traditionally been licensed or otherwise allocated to mobile network operators may be limited.

[0070] Accordingly, various techniques have been developed to enable cellular radio access technologies (RATs) to operate in unlicensed spectrum or other shared spectrum. For example, License Assisted Access (LAA) uses carrier aggregation on the downlink to combine LTE in a licensed band with LTE in an unlicensed band (e.g., the 2.4 and / or 5 GHz bands already occupied by wireless local area network (WLAN) or "Wi-Fi" devices). In other examples, enhanced LAA (eLAA) and further enhanced LAA (feLAA) technologies enable both uplink and downlink LTE operations in unlicensed spectrum, MulteFire is an LTE-based technology that operates in unlicensed and shared spectrum in a standalone mode, NR-U enables NR operation in unlicensed spectrum, and the like. Typically, when operating a cellular RAT in an unlicensed spectrum (e.g., using LAA, eLAA, feLAA, MulteFire, NR-U, etc.), one challenge that arises is the need to ensure fair coexistence with existing (e.g., WLAN) systems that may be operating in the unlicensed spectrum.

[0071] For example, before obtaining access to an unlicensed channel and / or transmitting on an unlicensed channel, a transmitting device (e.g., network node 110, UE 120, UE 405, UE 410, etc.) may need to perform a listen-before-talk (LBT) process to compete for access to the unlicensed channel. The LBT process may generally include a clear channel assessment (CCA) process, which is performed to determine whether the unlicensed channel is available (e.g., not occupied by other transmitters). Specifically, the CCA process may include: detecting an energy level on an unlicensed channel and determining whether the energy level meets (e.g., is less than or equal to) a threshold (sometimes referred to as an energy detection threshold, etc.). When the energy level meets (e.g., is not equal to or exceeds) the threshold, the CCA process is considered successful, and the transmitting device can obtain access to the unlicensed channel for a duration that can be referred to as a channel occupancy time (COT), during which the transmitting device can perform transmission without performing additional LBT operations. When the energy level does not meet the threshold, the CCA process is unsuccessful, and the competition for access to the unlicensed channel may be considered unsuccessful.

[0072] When the CCA process results in a determination that the unlicensed channel band is unavailable (e.g., because the energy level detected on the unlicensed channel indicates that another device is already using the channel), the CCA process may be performed again at a later time. In environments where a transmitting device may obtain limited access to an unlicensed channel (e.g., due to WLAN activity or transmissions by other devices), an extended CCA (eCCA) process may be employed to increase the likelihood that the transmitting device will successfully obtain access to the unlicensed channel.

[0073] For example, a transmitting device performing an eCCA process may perform a random number of CCA processes (from 1 to q) according to an eCCA counter. If the transmitting device senses that the channel has become idle and / or when the transmitting device senses that the channel has become idle, the transmitting device may start a random waiting period based on the eCCA counter, and start transmitting when the channel remains idle within the random waiting period.

[0074] Therefore, although wireless networks can be configured to use unlicensed spectrum to achieve faster data rates, provide a better user response experience, offload services from licensed spectrum, etc., the need to ensure fair coexistence with existing systems (e.g., WLAN devices) may hinder the efficient use of unlicensed spectrum. For example, even in the absence of interference, the LBT process used to ensure that no other device is already using the channel introduces a delay before the transmission can begin, which may degrade the user experience, resulting in unacceptable performance of delay-sensitive applications or delay-sensitive applications, etc. In addition, these problems may be exacerbated when the initial CCA process is unsuccessful because the transmitting device can only transmit on the channel after performing an additional number of CCA processes and determining that the channel has become idle and remains idle for a random waiting period. In addition, in some cases, the channel occupancy time obtained by the transmitting device may have a longer duration than the duration required for the transmitting device to perform the desired transmission, which may lead to inefficient use of the unlicensed channel.

[0075] Therefore, in some cases, the wireless network may enable the channel occupation time obtained by the transmitting device to be shared with other nodes in order to improve access, efficiency, etc. to the unlicensed channel. For example, in the downlink-to-uplink channel occupation time sharing on the access link, the network node 110 may obtain the COT using eCCA, and the COT may be shared with one or more UEs (e.g., UE 120, UE 405, UE 410, etc.), which may then transmit uplink signals within the COT obtained by the network node 110. In this case, the UE attempting to initiate an uplink transmission within the COT shared with the network node 110 may perform the uplink transmission without having to perform the LBT process, or the UE may perform the uplink transmission after performing a single CCA with a shorter LBT process (e.g., a Class 2 LBT process when the downlink-to-uplink gap duration is between 16 μs and 25 μs, a Class 1 LBT process when the downlink-to-uplink gap duration is less than or equal to 16 μs, etc.).

[0076] Additionally or alternatively, the wireless network may support uplink-to-downlink channel occupancy time sharing on the access link. In this case, a UE-initiated COT (e.g., for a configured grant PUSCH or scheduled uplink transmission) may be shared with the network node 110. In this manner, the network node 110 may be allowed to transmit control and / or broadcast signals and / or channels for any UE served by the network node 110, provided that the transmission includes downlink signals, channels, and / or other transmissions (e.g., PDSCH, PDCCH, reference signals, etc.) intended to be received by the UE that initiated the channel occupation.

[0077] Additionally or alternatively, the wireless network may support UE-to-UE COT sharing on the sidelink. Figure 4B In the example and as indicated by reference numeral 415, the COT acquired by the initiating UE (e.g., UE 405) can be shared in a frequency division multiplexing (FDM) mode by dividing the COT into multiple interlaces (e.g., time periods during which one or more UEs can perform transmission operations). Figure 4B As shown in , the initiating UE may use one or more sidelink resources (e.g., time and frequency resources) to transmit in the first interlace after the COT has been acquired, and the responding UE (e.g., UE 410) may use sidelink frequency resources that do not overlap with the sidelink frequency resources used by the initiating UE to perform transmission operations in subsequent interlaces. Figure 4B As shown in , FDM or interleaving-based COT sharing can introduce short transmission gaps between interleavings to allow other UEs to perform transmission operations in subsequent interleavings during the shared COT, and the sidelink control information sent by the initiating UE can carry information for supporting interleaving-based COT sharing.

[0078] Additionally or alternatively, UE-to-UE COT sharing may be implemented in a time division multiplexing (TDM) mode, as indicated by reference numeral 420. In this case, the total COT may be divided into an initial time period during which the initiating UE may perform a transmission, a remaining duration in the COT available for sharing, etc. The transmission may include one or more sidelink control information transmissions indicating when the initial transmission will end. Thus, one or more responding UEs may monitor the sidelink control information sent by other UEs (e.g., the initiating UE) to recover COT sharing information that may be used to perform transmissions during a time period corresponding to the shared COT.

[0079] Therefore, as described above, UE-to-UE COT sharing can achieve better access to unlicensed spectrum, more efficient use of unlicensed spectrum, etc. by enabling multiple UEs to perform transmissions during the COT obtained by the initiating UE (e.g., a UE that successfully performs an LBT process to obtain access to an unlicensed channel). However, in some cases, it may be challenging to implement UE-to-UE COT sharing because sidelink communications typically have a strict time slot structure that provides limited opportunities (e.g., contention time slots) in which another UE can perform an LBT process before transmitting. In addition, in some cases, a UE group may attempt to access some resources in the COT, which may increase the risk of a conflict. In some cases (e.g., when the risk of a conflict is relatively high), it may be beneficial to implement COT sharing using TDM. In some cases (e.g., when the risk of a conflict is relatively low), it may be beneficial to implement COT sharing using FDM.

[0080] Some aspects described herein relate to techniques and apparatus for implementing UE-to-UE channel occupancy time sharing in an unlicensed spectrum by sending information to enable one or more responding UEs to determine whether COT sharing is implemented using a first channel access type (e.g., COT sharing using FDM) or a second channel access type (e.g., COT sharing using TDM) and / or determining one or more other characteristics or parameters associated with utilizing COT (e.g., a transmission starting point and / or a sensing structure within the COT, etc.). In this manner, the initiating UE can dynamically implement COT with respect to different channel access types based at least in part on one or more network conditions (e.g., the number of UEs eligible to participate in COT sharing).

[0081] As pointed out above, Figure 4A and 4B is provided as an example. Other examples may differ from those described above. Figure 4A and Figure 4B As described.

[0082] Figure 5-9 is a diagram illustrating one or more examples 500 of sensing structures and prioritization in COT sharing in unlicensed spectrum according to various aspects of the present disclosure. Figure 5 As shown in , example 500 includes an initiating UE 120i and a responding UE 120r, wherein the initiating UE 120i has acquired a COT during which the UE 120i is allowed to transmit on an unlicensed channel, and the responding UE 120r communicates with the UE 120i on a sidelink via the unlicensed channel. Figure 5-9As shown in , UE 120r may determine a channel access type and one or more transmission starting points corresponding to one or more contention time slots during which UE 120r may send sidelink communications to share the COT acquired by UE 120i.

[0083] like Figure 5 , and as shown by reference numeral 505, UE 120i can obtain a COT during which UE 120i is allowed to transmit on an unlicensed channel. In some aspects, UE 120i can successfully perform an LBT process to obtain the COT. For example, before obtaining access to an unlicensed channel and transmitting on the unlicensed channel, UE 120i can perform an LBT process to compete for access to the unlicensed channel. In some aspects, the LBT process can include a clear channel assessment (CCA) process performed by UE 120i to determine whether the unlicensed channel is available (e.g., not occupied by other transmitters). In some aspects, UE 120i can detect the energy level on the unlicensed channel, and if the energy level of the unlicensed channel meets (e.g., is less than or equal to) a threshold, the CCA process can be determined to be successful. In this case, UE 120i can obtain access to the unlicensed channel to obtain a COT, and UE 120i can perform transmission during the COT without performing additional LBT operations.

[0084] In the event that the energy level detected on the unlicensed channel fails to meet (e.g., is greater than or equal to a threshold), the CCA procedure may be determined to be unsuccessful, and the UE 120i may perform the CCA procedure again at a later time and obtain the COT. Additionally or alternatively, the UE 120i may obtain the COT by performing another type of channel access procedure. For example, the UE 120i may obtain the COT by performing an extended CCA (eCCA) procedure.

[0085] UE 120r may receive COT structure information, as indicated by reference numeral 510. For example, UE 120i may send COT structure information based at least in part on acquiring the COT. The COT structure message may indicate a resource structure (e.g., time resources and / or frequency resources) of the COT.

[0086] As indicated by reference numeral 515, UE 120i may send, and UE 120r may receive, a COT sharing indication to enable sharing of a COT acquired by UE 120i. In some aspects, the COT sharing indication may be included in sidelink control information (e.g., SCI-1 or SCI-2) sent by UE 120i to a group of one or more UEs (e.g., a group of UEs including UE 120r).

[0087] In some aspects, the COT sharing indication may indicate a channel access type associated with the COT. For example, the COT sharing indication may indicate whether the COT is associated with a first channel access type (e.g., COT sharing using FDM) or a second channel access type (e.g., COT sharing using TDM).

[0088] In some aspects, the COT sharing indication may include a direct indication of a channel access type associated with the COT. In some aspects, the COT sharing indication may indicate a channel access type based at least in part on the presence or absence of a direct indication of the channel access type (e.g., a flag, a set of one or more bits, and / or the presence or absence of another type of direct indication of the channel access type). For example, when the COT sharing indication includes a flag, a set of one or more bits, or another type of indicator, the COT may be associated with a first channel access type, and when the COT sharing indication does not include an indication of a channel access type associated with the COT, the COT may be associated with a second channel access type.

[0089] As another example, the COT sharing indication may include a set of one or more bits to indicate a channel access type associated with the COT. In some aspects, the set of bits may be set to a first value (e.g., 0) to indicate that the COT is associated with a first channel access type, and may be set to a second value (e.g., 1) to indicate that the COT is associated with a second channel access type.

[0090] In some aspects, the value of the bit set may indicate an entry in a table. For example, the UE 120r may maintain multiple tables associated with COT sharing. Each table may include multiple entries indicating a channel access type, a transmission start point, a priority associated with the transmission start point, a cyclic prefix extension, an automatic gain control puncturing value, and / or a sensing duration for a channel access procedure associated with the COT. The UE 120r may determine the table and / or entry associated with the COT based at least in part on the bit set.

[0091] For example, a first bit in the bit set may indicate a table of a plurality of tables maintained by the UE 120r. A second bit in the bit set may indicate a row of the table, and a third bit in the bit set may indicate a column of the table. The UE 120r may determine a channel access type associated with the COT based at least in part on entries corresponding to the columns and rows of the table indicated by the bit set. In some aspects, the presence of the bit set in the COT sharing indication may indicate that the COT is associated with a first channel access type, and the absence of the bit set may indicate that the COT is associated with a second channel access type.

[0092] In some aspects, the COT sharing indication may indirectly indicate the channel access type associated with the COT. For example, as described in more detail below, the COT sharing indication may include additional information associated with the COT that the UE 120r may utilize to determine whether the COT is associated with the first channel access type or the second channel access type.

[0093] As indicated by reference numeral 520, UE 120r may determine whether UE 120r is eligible to use the COT based at least in part on receiving the COT sharing indication. In some aspects, UE 120r may determine whether UE 120r is eligible to use the COT based at least in part on whether UE 120r is a target of at least a PSSCH of UE 120i. For example, when UE 120r receives a PSSCH from UE 120i during a first portion or non-shared portion of the COT, UE 120r may determine that UE 120r is eligible to use the COT.

[0094] In some aspects, UE 120r may determine whether UE 120r is eligible to use the COT based at least in part on whether UE 120r is a target of a transmission by UE 120i. For example, UE 120r may determine that UE 120r is eligible to use the COT when an identifier associated with UE 120r is included in a destination ID field of a COT sharing indication.

[0095] In some aspects, UE 120 r may determine whether UE 120 r is eligible to use COT based at least in part on the priority indicated in the COT sharing indication and / or the priority of the transmission of UE 120 r. For example, UE 120 r may determine that UE 120 r is eligible to use COT to send the particular transmission when the priority associated with the particular transmission is greater than or equal to the priority indicated in the COT sharing indication.

[0096] In some aspects, UE 120r may determine whether UE 120r is eligible to use COT based at least in part on whether COT is used for transmissions to UE 120i. For example, UE 120r may determine that UE 120r is eligible to use COT when UE 120r is to send a transmission to UE 120i using COT.

[0097] As indicated by reference numeral 525, the UE 120r may determine a channel access type associated with the COT based at least in part on determining that the UE 120r is eligible to use the COT. In some aspects, the UE 120r may determine the channel access type based at least in part on the COT sharing indication.

[0098] In some aspects, the COT sharing indication may include a direct indication of the channel access type associated with the COT. For example, the COT sharing indication may include a flag indicating the channel access type associated with the COT, a set of one or more bits, and / or another type of indicator.

[0099] In some aspects, the UE 120r may determine the channel access type based at least in part on the presence or absence of a direct indication of the channel access type (e.g., a flag, a set of one or more bits, and / or the presence or absence of another type of direct indication of the channel access type). For example, when the COT sharing indication includes a flag, a set of one or more bits, or another type of indicator, the UE 120r may determine that the COT is associated with a first channel access type. When the COT sharing indication does not include a direct indication of the channel access type associated with the COT, the UE 120r may determine that the COT is associated with a second channel access type.

[0100] In some aspects, the COT sharing indication may include a set of one or more bits, and the UE 120r may determine, based at least in part on the set of bits, a channel access type associated with the COT. In some aspects, the UE 120r may determine, based at least in part on the set of bits being set to a first value (e.g., 0), that the COT is associated with a first channel access type. In some aspects, the UE 120r may determine, based at least in part on the set of bits being set to a second value (e.g., 1), that the COT is associated with a second channel access type.

[0101] In some aspects, the value of the bit set may indicate an entry in a table. The UE 120r may determine the channel access type associated with the COT based at least in part on the information included in the entry. For example, the UE 120r may determine the table, entry, and / or channel access type associated with the COT in a manner similar to that described above.

[0102] In some aspects, the COT sharing indication may include an indirect indication of a channel access type associated with the COT. For example, the COT sharing indication may include additional information associated with the COT, and the UE 120r may determine the channel access type associated with the COT based at least in part on the additional information.

[0103] In some aspects, the additional information may include information indicating a number of UEs associated with the COT, and the UE 120r may determine a channel access type associated with the COT based at least in part on the number of UEs. For example, the UE 120r may determine whether the number of UEs associated with the COT meets (e.g., is greater than) a threshold. When the number of UEs associated with the COT meets the threshold, the UE 120r may determine that the COT is associated with a second channel access type. When the number of UEs associated with the COT fails to meet the threshold, the UE 120r may determine that the COT is associated with a second channel access type.

[0104] In some aspects, the number of UEs associated with the COT corresponds to the amount of UEs indicated in the COT sharing indication. For example, the COT sharing indication may include an identifier associated with a UE group that may share the COT. The UE 120r may determine the channel access type associated with the COT based at least in part on whether the number of UEs included in the UE group satisfies a threshold.

[0105] In some aspects, the number of UEs associated with the COT corresponds to the number of UEs to which the COT sharing indication is sent. For example, the COT sharing indication may indicate a group of UEs to which the COT sharing indicator is sent (e.g., the COT may include a set of destination addresses for the group of UEs). The UE 120r may determine the channel access type associated with the COT based at least in part on whether the number of UEs included in the group of UEs to which the COT is sent satisfies a threshold.

[0106] In some aspects, the UE 120r may determine the channel access type associated with the COT based at least in part on whether the COT is associated with resource reservation. For example, when one or more resources of the COT that may be utilized by the UE 120r are associated with resource reservation (e.g., when another UE sends sidelink control information reserving one or more resources, wherein the one or more resources are included in a portion of the COT that may be shared by the UE group to which the COT sharing indication is sent), the UE 120r may determine that the COT is associated with a first channel access type.

[0107] As indicated by reference numeral 530, the UE 120r may determine a transmission starting point based at least in part on the channel access type. The transmission starting point may correspond to the start of a portion of the COT that may be used by the UE 120r for sidelink communications.

[0108] For example, Figure 6As shown in , the sidelink time slot structure 605 without a physical sidelink feedback channel (PSFCH) may include a total of fourteen (14) symbols, wherein thirteen (13) symbols indexed from zero (0) to twelve (12) may be used for physical sidelink control channel (PSCCH) and / or physical sidelink shared channel (PSSCH) transmission, and the last symbol in the time slot (index thirteen (13)) serves as a gap during which no transmission is performed. In addition, as shown in Figure 6 As shown in , the first symbol is used for AGC training, whereby the second symbol (symbol 1) is a repetition of the first symbol (symbol 0) to increase reliability for PSCCH and / or PSSCH transmissions (e.g., because the receiving UE may not be able to correctly receive and / or decode the first symbol before performing AGC training). Alternatively, the sidelink time slot structure 610 with PSFCH may include a total of fourteen (14) symbols, of which ten (10) symbols indexed from zero (0) to nine (9) may be used for PSCCH and / or PSSCH transmissions, two symbols indexed eleven (11) and twelve (12) are used for repetitions of PSFCH symbols, and the remaining two symbols indexed ten (10) and thirteen (13) serve as gaps during which no transmission is performed. Regardless of whether the sidelink time slot structure includes PSFCH symbols, the last symbol in the time slot is a gap symbol, and the first symbol in the time slot is an automatic gain control (AGC) symbol, which is a repetition of the second symbol.

[0109] Thus, in some aspects, UE 120r may determine a transmission start point within a joint time period including the last symbol (symbol 13) in a current time slot (e.g., the time slot prior to the transmission) and the first symbol (symbol 0) of a next time slot (e.g., the time slot in which UE 120r will perform a transmission), which may represent the start of a possible time when UE 120r may begin transmission in a COT shared by UE 120i.

[0110] In some aspects, the COT may be associated with a first channel access type (e.g., COT utilizing FDM), and the UE 120r may determine a common or default transmission starting point based at least in part on the COT being associated with the first channel access type. Figure 7 As shown in FIG. 1 , the COT (e.g., the gap symbol (symbol 13)) can be associated with a common or default transmission start point (TSP FDM ) The UE 120r may identify a common or default transmission starting point as the transmission starting point based at least in part on the COT being associated with the first channel access type.

[0111] In some aspects, a COT may be configured with multiple common or default transmission starting points. Each common or default transmission starting point may be associated with a priority. In some aspects, each common or default transmission starting point may be associated with the same priority. In some aspects, one or more of the multiple common or default transmission starting points may be associated with a priority that is different from a priority associated with another common or default transmission starting point in the multiple common or default transmission starting points.

[0112] In some aspects, the COT sharing indication may indicate a priority associated with the COT, and the UE 120r may determine a common or default transmission starting point from among a plurality of common or default transmission starting points based at least in part on the priority associated with the COT. For example, the UE 120r may maintain a mapping of priorities to transmission starting points and may utilize the mapping to identify, as the transmission starting point, a common or default transmission starting point that is associated with the same priority as the priority associated with the COT.

[0113] In some aspects, the UE 120r may receive the mapping from a network node. For example, the mapping may be received from a network node (e.g., network node 110) via radio resource control (RRC) signaling. Additionally or alternatively, the mapping may be hard-coded and / or maintained in a memory of the UE 120r.

[0114] In some aspects, the UE 120r may determine a common or default transmission starting point based at least in part on a priority associated with transmissions of the UE 120r. For example, the UE 120r may maintain a mapping of priorities of transmissions by the UE 120r to transmission starting points. The UE 120r may utilize the mapping to determine a common or default transmission starting point associated with the same priority as the priority associated with transmissions of the UE 120r.

[0115] In some aspects, UE 120r may determine a transmission starting point based at least in part on the COT being associated with the first channel access type and based at least in part on the COT being associated with resource reservation. In some aspects, UE 120r may determine that the COT is associated with resource reservation based at least in part on receiving an SCI sent by another UE. The SCI may indicate a resource reservation for resources included in the COT.

[0116] In some aspects, the SCI indicates a transmission start point. For example, the SCI may indicate a start point for resource reservation, and the UE 120r may identify the start point for resource reservation as a transmission start point.

[0117] In some aspects, the SCI may include a set of one or more bits, and the UE 120r may determine a starting point for resource reservation based at least in part on the set of one or more bits. In some aspects, the set of one or more bits may indicate an index associated with the starting point for resource reservation, and the UE 120r may determine the starting point for resource reservation, and thereby the transmission starting point, based at least in part on the index.

[0118] In some aspects, a set of one or more bits may indicate an entry in the table. The UE 120r may identify the entry based at least in part on the set of one or more bits. The entry may include information indicating a transmission starting point and / or a starting point for resource reservation, and the UE 120r may determine the transmission starting point based at least in part on the information included in the entry.

[0119] In some aspects, the SCI may indicate a priority associated with the resource reservation (e.g., the SCI may indicate a layer 1 (L1) priority and / or a channel access priority class (CAPC) value, etc.), and the UE 120r may determine a transmission starting point based at least in part on the priority. For example, the UE 120r may maintain a mapping of CAPC values ​​to transmission starting points. The UE 120r may utilize the mapping to determine a transmission starting point associated with the CAPC value indicated in the SCI.

[0120] In some aspects, the UE 120r may determine the transmission starting point based at least in part on the number of subchannels associated with the resource reservation. For example, the UE 120r may determine that the transmission starting point corresponds to a default transmission starting point associated with the COT based at least in part on the number of allocated subchannels associated with the resource reservation being less than the number of subchannels included in the set of resource blocks of the COT.

[0121] In some aspects, UE 120r may determine a common or default transmission starting point based at least in part on a reference transmission. In some aspects, the reference transmission may be a transmission of UE 120i. For example, UE 120r may determine a common or default transmission starting point based at least in part on an end of a transmission of UE 120i. In some aspects, UE 120r may select a common or default transmission starting point that occurs a time period (X μs) after an end of a transmission of UE 120i.

[0122] In some aspects, the time period Xμs may be configurable by the UE 120i. For example, the COT sharing indication may indicate the time period Xμs. Additionally or alternatively, the time period Xμs may be configurable by a network node (eg, network node 110).

[0123] In some aspects, the reference transmission may be a response to the transmission of UE 120i. For example, UE 120r may determine a common or default transmission starting point based at least in part on an end of the transmission of the response to the transmission of UE 120i. In some aspects, UE 120r may select a common or default transmission starting point that occurs a time period (Yμs) after an end of the transmission of the response to the transmission of UE 120i.

[0124] In some aspects, the time period Yμs may be configurable by the UE 120i. For example, the COT sharing indication may indicate the time period Yμs. Additionally or alternatively, the time period Yμs may be configurable by a network node (eg, network node 110).

[0125] In some aspects, the time period Y μs may be the same as the time period X μs. In some aspects, the time period Y μs may be different from the time period X μs.

[0126] In some aspects, UE 120r may determine a UE to send a response to UE 120i based at least in part on the sidelink control information sent by UE 120i. For example, UE 120r may decode a destination ID field of the sidelink control information sent by UE 120i. UE 120r may detect a transmission from a UE indicated by the destination ID field to UE 120i. UE 120r may determine a common or default transmission starting point based at least in part on an end of a transmission from a UE indicated by the destination ID field to UE 120i.

[0127] In some aspects, the UE 120r may determine the common or default transmission starting point based at least in part on an amount of time associated with the UE 120r decoding the COT sharing indication. In some aspects, the UE 120r may complete decoding the COT sharing indication and / or determine the common or default transmission starting point after the occurrence of the common or default transmission starting point. The UE 120r may select another common or default transmission starting point from a plurality of common or default transmission starting points associated with the COT based at least in part on the UE 120r completing decoding the COT sharing indication and / or determining the transmission starting point after the occurrence of the common or default transmission starting point.

[0128] In some aspects, the other common or default transmission starting point for UE 120r may be a next occurring common or default transmission starting point. In some aspects, the other common or default transmission starting point may be a next occurring common or default transmission starting point associated with the same priority as the priority associated with transmissions of UE 120r or a lower priority relative to the priority associated with transmissions of UE 120r.

[0129] In some aspects, the UE 120r may complete decoding the COT sharing indication and / or determining the common or default transmission starting point prior to the occurrence of the common or default transmission starting point, but may not have sufficient time to perform a channel access procedure prior to the transmission starting point. For example, the COT may be associated with a channel access procedure that requires a minimum amount of sensing to be applied (e.g., for 25 μs). The UE 120r may complete decoding the COT sharing indication and / or determining the common or default transmission starting point prior to the occurrence of the common or default transmission starting point, but may not have sufficient time to apply the minimum amount of sensing.

[0130] The UE 120r may select another common or default transmission starting point from the plurality of common or default transmission starting points associated with the COT that provides a sufficient amount of time for the UE 120r to perform a channel access procedure. In some aspects, the UE 120r may select another common or default transmission starting point based at least in part on a mapping different than the mapping used to determine the initial common or default transmission starting point (e.g., a mapping of priorities to common or default transmission starting points).

[0131] In some aspects, the mapping for determining another transmission starting point can be configured to map the priority to a transmission starting point that occurs at least a minimum amount of time after the end of the reference transmission. In some aspects, the minimum amount of time can be greater than an amount of time associated with performing a channel access procedure.

[0132] In some aspects, the COT may be associated with a second channel access type (e.g., COT with TDM), and the UE 120r may select a transmission starting point from the set of transmission starting points based at least in part on the COT being associated with the second channel access type. Figure 8 As shown in FIG. 1 , a COT (eg, a gap symbol (symbol 13)) may be configured with a transmission starting point group (TSP TDM1 、TSP TDM2 、TSP TDM3 and TSP TDM4 , as shown in the figure).

[0133] In some aspects, the UE 120r may determine a transmission starting point group for a COT configuration based at least in part on the transmission starting point configuration. For example, the UE 120r may receive (e.g., from the network entity 110 and / or the UE 120i) and / or store in a memory of the UE 120r one or more transmission starting point configurations associated with the COT.

[0134] In some aspects, the UE 120r may select a transmission starting point from the group of transmission starting points based at least in part on the number of priorities indicated in the COT sharing indication. For example, the COT sharing indication may include a set of one or more bits, and the value of the one or more bits may correspond to the number of priorities associated with the group of transmission starting points. The UE 120r may determine the priority associated with each transmission starting point based at least in part on the number of priorities associated with the group of transmission starting points.

[0135] For example, a set of one or more bits may be set to a first value (e.g., 1) to indicate that each transmission starting point in the transmission starting point group is associated with the same priority (e.g., the highest priority). As another example, one or more bits may be set to a second value (e.g., 2) to indicate that the first half of the transmission starting points (e.g., TSP TDM1 and TSP TDM2 ) is associated with the first priority (eg, the highest priority) and indicates the second half of the transmission start points (eg, TSP TDM3 and TSP TDM4 ) is associated with a second priority level (e.g., the next highest priority level).

[0136] In some aspects, UE 120r may select a transmission starting point based at least in part on a mapping. For example, UE 120r may maintain a mapping of priorities associated with transmissions of UE 120r to transmission starting points included in a transmission starting point group. UE 120r may utilize the mapping to determine a transmission starting point associated with a priority that is the same as the priority of the transmissions of UE 120r.

[0137] In some aspects, UE 120 r may maintain multiple mappings. UE 120 r may determine a mapping from the multiple mappings to use for determining a transmission starting point associated with the same priority as the priority of the transmission of UE 120 r based at least in part on an indication included in the COT sharing indication, a priority associated with the COT, and / or a priority associated with the transmission of UE 120 r, etc.

[0138] In some aspects, the UE 120r may receive a mapping (and / or one or more of a plurality of mappings) from a network node. For example, the mapping may be received from a network node (e.g., network node 110) via radio resource control (RRC) signaling. Additionally or alternatively, the mapping may be hard-coded and / or maintained in a memory of the UE 120r.

[0139] In some aspects, UE 120r may determine a transmission starting point based at least in part on a reference transmission. In some aspects, the reference transmission may be a transmission of UE 120i. For example, UE 120r may determine a transmission starting point based at least in part on an end of a transmission of UE 120i in a manner similar to that described above.

[0140] In some aspects, the reference transmission may be a response to the transmission by UE 120i. For example, UE 120r may determine a transmission starting point based at least in part on an end of a transmission in response to the transmission by UE 120i in a manner similar to that described above.

[0141] In some aspects, the UE 120r may determine the transmission starting point based at least in part on an amount of time associated with the UE 120r decoding the COT sharing indication. In some aspects, the UE 120r may complete decoding the COT sharing indication and / or determining the transmission starting point after the occurrence of the transmission starting point. The UE 120r may select another transmission starting point from the group of transmission starting points based at least in part on the UE 120r completing decoding the COT sharing indication and / or determining the transmission starting point after the occurrence of the transmission starting point in a manner similar to that described above.

[0142] In some aspects, the other transmission starting point for UE 120r may be a next occurring transmission starting point. In some aspects, the other transmission starting point may be a next occurring transmission starting point associated with the same priority as the priority associated with the transmission of UE 120r or a lower priority relative to the priority associated with the transmission of UE 120r.

[0143] In some aspects, the UE 120r may complete decoding the COT sharing indication and / or determining the transmission starting point before the occurrence of the transmission starting point, but may not have sufficient time to perform a channel access procedure before the transmission starting point. For example, the COT may be associated with a channel access procedure that requires a minimum amount of sensing to be applied (e.g., for 25 μs). The UE 120r may complete decoding the COT sharing indication and / or determining the transmission starting point before the occurrence of the transmission starting point, but may not have sufficient time to apply the minimum amount of sensing.

[0144] UE 120r may select another transmission starting point from the set of transmission starting points that provides a sufficient amount of time for UE 120r to perform a channel access procedure. In some aspects, UE 120r may select another transmission starting point based at least in part on a mapping different than the mapping used to determine the initial transmission starting point (e.g., a mapping of priorities to transmission starting points).

[0145] In some aspects, the mapping for determining another transmission starting point can be configured to map the priority to a transmission starting point that occurs at least a minimum amount of time after the end of the reference transmission. In some aspects, the minimum amount of time can be greater than an amount of time associated with performing a channel access procedure.

[0146] like Figure 5 1 and indicated by reference numeral 535, the UE 120r may perform a channel access procedure based at least in part on determining a transmission starting point. In some aspects, the UE 120r may perform a channel access procedure based at least in part on a sensing structure associated with the transmission starting point.

[0147] In some aspects, a sensing structure associated with a transmission start point can be determined based at least in part on an amount of time between an end of a reference transmission and the transmission start point. In some aspects, the transmission start point can be associated with a type 2C channel access when the amount of time between the end of the transmission start point and the reference transmission is less than a first amount of time (e.g., less than 16 μs) and the duration of the transmission is less than a second amount of time (e.g., 584 μs). For example, Fig. 9 As shown in FIG, the end of the reference transmission (eg, the beginning of symbol 13) and the first transmission start point (TSP 1 ) is 9 μs. UE 120r may determine that 9 μs is less than the first amount of time. UE 120r may determine that the first transmission start point is associated with a Type 2C channel access based at least in part on 9 μs being less than the first amount of time and when the duration of the transmission by UE 120r is within the second amount of time.

[0148] In some aspects, when the amount of time between the transmission start point and the end of the reference transmission point is equal to the first amount of time, the transmission start point may be associated with a type 2B channel access. Fig. 9 As shown in FIG, at the end of the reference transmission and the start point of the second transmission (TSP 2 ) is 16 μs. UE 120r may determine that the second transmission start point is associated with a type 2B channel access based at least in part on the amount of time between the second transmission start point and the end of the reference transmission being equal to the first amount of time.

[0149] In some aspects, when the amount of time between the transmission start point and the end of the reference transmission point is equal to a third amount of time (e.g., 25 μs), the transmission start point may be associated with a type 2A channel access. Fig. 9 As shown in FIG, at the end of the reference transmission and the third transmission start point (TSP 3) is 25 μs. UE 120r may determine that the third transmission starting point is associated with type 2A channel access based at least in part on the amount of time between the third transmission starting point and the end of the reference transmission being equal to the third amount of time.

[0150] In some aspects, for subsequent transmission starting points (e.g., TSP i ), UE 120r may receive a signal at a time corresponding to the occurrence of a subsequent transmission point (t i ) before using the type 2A channel access. Time (t i ) may correspond to the amount of time between the third transmission point and the end of the reference transmission (eg, 25 μs) plus the amount of time (x i ). Time quantity (x i ) may correspond to an amount of time between a third transmission starting point and a subsequent transmission starting point.

[0151] In some aspects, for a subsequent transmission start point, when the amount of time (x i ) equals (i-3) x 9 μs, UE 120r may determine that the subsequent transmission start point is associated with type 2A channel access plus i-3 9 μs contention slots. For example, for the fourth transmission start point, i is equal to 4. UE 120r may determine that the subsequent transmission start point is associated with type 2A channel access plus i-3 9 μs contention slots. i ) (e.g., 9 μs between the third transmission point and the fourth transmission point) is equal to (4-3) x 9 μs (e.g., 9 μs), to determine that the fourth transmission start point is associated with type 2A channel access plus 1 (e.g., i-3) 9 μs contention slot.

[0152] In some aspects, the UE 120r may determine a sensing structure associated with a transmission starting point based at least in part on whether the transmission starting point is an initial transmission starting point (e.g., a transmission starting point determined prior to an occurrence of the transmission starting point and with sufficient time to perform a channel access procedure) or a next or later transmission starting point (e.g., a transmission starting point determined after an occurrence of the initial transmission starting point and at least in part based on the initial transmission starting point or determined prior to an occurrence of the initial transmission starting point but without sufficient time to perform a channel access procedure).

[0153] In some aspects, the UE 120r may determine the sensing structure associated with the initial transmission point in a manner similar to that described above. In some aspects, for a next or later transmission start point, the UE 120r may determine to use type 2A channel access before the time of the next or later transmission start point. In some aspects, the UE 120r may determine to use type 2A channel access based at least in part on the next or later transmission point (t i ) appears (t i) is equal to (i–1)xx i μs, to determine the time (t i ) previously used type 2A channel access.

[0154] In some aspects, the UE 120r may apply sensing prior to the start of the gap symbol based at least in part on the transmission start point being the next or later transmission start point. i When it is equal to (i–1) x 9 μs, UE 120r can determine to use type 2A channel access before the gap symbol plus i-1 9 μs contention slots.

[0155] In some aspects, UE 120r may determine the time based at least in part on the time (t i ) is equal to 25+(i–1)xx i μs to determine the start of the gap symbol from which to apply sensing. In some aspects, the UE 120r may start at time (t i ) using a Type 2A channel access at any time before. In some aspects, when x i When it is equal to 25+(i–1)x 9μs, UE 120r can use Type 2A access plus i–1 contention slots of 9μs.

[0156] like Figure 5 , and as shown by reference numeral 540, the UE 120r may send communications during the COT based at least in part on performing a channel access procedure. For example, the UE 120r may send communications during the COT based at least in part on determining that the COT is available based at least in part on the CCA procedure being determined to be successful, as described elsewhere herein.

[0157] As pointed out above, Figure 5-9 are provided as examples. Other examples may differ from those regarding Figure 5-9 As described.

[0158] Fig.10 1 is a diagram illustrating an example process 1000 performed, for example, by a first UE in accordance with the present disclosure. Example process 1000 is an example in which a first UE (e.g., UE 120r) performs operations associated with sensing structure and prioritization in COT sharing for a sidelink in an unlicensed spectrum.

[0159] like Fig.10 As shown in , in some aspects, process 1000 may include receiving a COT sharing indication from a second UE (block 1010). For example, a first UE (e.g., using Fig.12The communication manager 140 and / or receiving component 1202 depicted in the figure can receive a COT sharing indication from the second UE, as described above.

[0160] like Fig.10 As further shown in FIG. 1 , in some aspects, process 1000 may include determining, based at least in part on receiving a COT sharing indication, whether the COT is associated with a first channel access type or a second channel access type, wherein the first channel access type is associated with aligning sidelink transmissions across a group of UEs, and wherein the second channel access type is associated with determining a transmission start point for sidelink communications based at least in part on a priority associated with the first UE (block 1020). For example, a first UE (e.g., using Fig.12 The communication manager 140 and / or the determining component 1208 depicted in the figure can determine whether the COT is associated with the first channel access type or the second channel access type based at least in part on receiving the COT sharing indication, as described above. In some aspects, the first channel access type is associated with aligning sidelink transmissions across the UE group. In some aspects, the second channel access type is associated with determining a transmission starting point for sidelink communication based at least in part on a priority associated with the first UE.

[0161] like Fig.10 As further shown in FIG. 1 , in some aspects, process 1000 may include attempting to send a sidelink communication at a transmission starting point, wherein the transmission starting point corresponds to a common starting point utilized by the group of UEs based at least in part on the COT being associated with the first channel access type, or wherein the transmission starting point is selected from one or more transmission starting points in the COT based at least in part on the COT being associated with the second channel access type (block 1030). For example, a first UE (e.g., using Fig.12 The communication manager 140 and / or the transmitting component 1204 depicted in FIG. 1 may attempt to transmit the sidelink communication at a transmission starting point, as described above. In some aspects, the transmission starting point corresponds to a common starting point utilized by the group of UEs based at least in part on the COT being associated with the first channel access type. In some aspects, the transmission starting point is selected from one or more transmission starting points in the COT based at least in part on the COT being associated with the second channel access type.

[0162] Process 1000 may include additional aspects, such as any single aspect and / or any combination of the aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0163] In a first aspect, determining whether a COT is associated with a first channel access type or a second channel access type includes determining whether the COT is associated with the first channel access type or the second channel access type based at least in part on whether an indicator is included in a COT sharing indication.

[0164] In a second aspect, based at least in part on the COT being associated with the first channel access type, the indicator comprises a set of one or more bits indicating an entry in a table. The entry may indicate one or more of a transmission start point, a cyclic prefix extension, an automatic gain control puncturing value, a channel access type, or a sensing duration.

[0165] In a third aspect, the COT is associated with a first channel access type based at least in part on including an indicator in a COT sharing indication, or the COT is associated with a second channel access type based at least in part on not including an indicator within the COT sharing indication.

[0166] In a fourth aspect, determining whether a COT is associated with a first channel access type or a second channel access type includes determining whether the COT is associated with the first channel access type or the second channel access type based at least in part on a resource allocation associated with the COT.

[0167] In a fifth aspect, determining whether the COT is associated with the first channel access type or the second channel access type includes determining whether the COT is associated with the first channel access type or the second channel access type based at least in part on a number of subchannels associated with a resource allocation.

[0168] In a sixth aspect, determining whether a COT is associated with a first channel access type or a second channel access type comprises determining whether the COT is associated with the first channel access type or the second channel access type based at least in part on a number of UEs associated with the COT.

[0169] In a seventh aspect, the COT sharing indication is used to indicate a number of UEs that can share the COT, and based at least in part on the number of UEs being greater than a threshold number, the COT is associated with a second channel access type.

[0170] In an eighth aspect, a COT sharing indication is sent to a UE group, and based at least in part on a number of UEs included in the UE group being greater than a threshold number, the COT is associated with a second channel access type.

[0171] In a ninth aspect, determining whether the COT is associated with the first channel access type or the second channel access type includes determining whether the COT is associated with the first channel access type or the second channel access type based at least in part on whether the COT is associated with resource reservation.

[0172] In a tenth aspect, a COT sharing indication is sent to a first UE and a third UE, and determining whether the COT is associated with a first channel access type or a second channel access type includes determining that the channel access type includes the first channel access type based at least in part on the COT being associated with a resource reservation associated with the third UE and within the COT.

[0173] In an eleventh aspect, process 1000 includes determining a transmission starting point based at least in part on a priority associated with a sidelink communication and a mapping of the transmission starting point to one or more priorities associated with the sidelink communication.

[0174] In the twelfth aspect, the one or more priorities may include a single priority, or may include a plurality of priorities, wherein each of the plurality of priorities is mapped to a different transmission starting point.

[0175] In a thirteenth aspect, the first UE fails to decode the COT sharing indication, or determines that the channel access process fails to be completed before the first transmission start point in the transmission start point that is mapped to the priority of the sidelink communication, and determining the transmission start point includes: determining the transmission start point at least in part based on the transmission start point being mapped to a priority that is the same priority as the priority associated with the same sidelink communication or being mapped to a priority that is lower than the priority associated with the sidelink communication.

[0176] In a fourteenth aspect, the mapping includes a first mapping based at least in part on the COT being associated with a first channel access type, and the mapping includes a second mapping different from the first mapping based at least in part on the COT being associated with a second channel access type.

[0177] In a fifteenth aspect, the mapping is preconfigured in the first UE or the mapping is signaled by a network entity.

[0178] In a sixteenth aspect, process 1000 includes determining a transmission starting point based at least in part on a reference transmission.

[0179] In a seventeenth aspect, process 1000 includes determining a transmission starting point based at least in part on an end of transmission of a COT sharing indication.

[0180] In an eighteenth aspect, process 1000 includes determining a transmission starting point based at least in part on an end of transmission of a response to a communication sent by a second UE.

[0181] In a nineteenth aspect, the transmission starting point is located in the gap symbol and is achieved via cyclic prefix extension.

[0182] In the twentieth aspect, the transmission starting point is located in the AGC symbol and is achieved via AGC symbol puncturing.

[0183] In a twenty-first aspect, process 1000 includes determining a transmission starting point based at least in part on a first priority associated with a sidelink communication and a priority associated with a COT.

[0184] In aspect twenty-second, the first UE determines that a channel access process has not been completed before a transmission start point, and process 1000 includes determining a next transmission start point based at least in part on determining that the channel access process has not been completed before the transmission start point, and attempting to send sidelink communication based at least in part on the next transmission start point.

[0185] In a twenty-third aspect, a transmission start point is determined based at least in part on a first mapping of a transmission start point to a priority associated with a sidelink communication, and a next transmission start point is determined based at least in part on a second mapping of a transmission start point to a priority associated with a sidelink communication.

[0186] In the twenty-fourth aspect, the gap between a reference transmission and a next transmission starting point is greater than or equal to an amount of time associated with performing a channel access procedure.

[0187] In a twenty-fifth aspect, attempting to transmit a sidelink communication includes performing sensing associated with the channel access procedure prior to or beginning with a gap symbol.

[0188] In a twenty-sixth aspect, a transmission starting point is associated with a channel access sensing structure based at least in part on an amount of time between an end of a reference transmission and a time corresponding to the transmission starting point.

[0189] In a twenty-seventh aspect, the COT sharing indication is used to indicate a slot index corresponding to an end of a reference transmission.

[0190] In a twenty-eighth aspect, the COT is associated with a resource reservation, wherein the COT is associated with a first channel access type based at least in part on the COT being associated with the resource reservation, and process 1000 includes determining a transmission start point based at least in part on the transmission start point associated with the resource reservation.

[0191] In a twenty-ninth aspect, process 1000 includes determining a transmission starting point based at least in part on one or more of the following: a transmission starting point associated with a resource reservation is indicated in sidelink control information associated with the resource reservation, a priority associated with the resource reservation, or a default transmission starting point associated with a first channel access type.

[0192] In a thirtieth aspect, the first channel access type is associated with a maximum number of subchannels selectable by the first UE for transmission of sidelink communications.

[0193] In a thirty-first aspect, the maximum number of subchannels is preconfigured in the first UE, signaled by a network entity via radio resource control (RRC) signaling, or signaled by the second UE via PC-5RRC signaling.

[0194] In a thirty-second aspect, a COT sharing indication and inter-UE coordination signaling are used to indicate a preferred set of resources to be used by a first UE.

[0195] although Fig.10 Example blocks of process 1000 are shown, but in some aspects, process 1000 may include Fig.10 1000. In some embodiments, the process 1000 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in the process 1000. Additionally or alternatively, two or more of the blocks of process 1000 may be executed in parallel.

[0196] Fig.11 1 is a diagram illustrating an example process 1100 performed, for example, by a first UE in accordance with the present disclosure. Example process 1100 is an example in which a first UE (e.g., UE 120i) performs operations associated with sensing structure and prioritization in COT sharing for a sidelink in an unlicensed spectrum.

[0197] like Fig.11 As shown in , in some aspects, process 1100 may include: obtaining a COT (block 1110). For example, a first UE (e.g., using Fig.13 The communications manager 140 and / or acquisition component 1308 depicted in FIG. 1 may acquire the COT as described above.

[0198] like Fig.11 As further shown in FIG. 1 , in some aspects, process 1100 may include sending a COT sharing indication to a second UE group to enable the second UE group to utilize a portion of a COT, wherein the COT sharing indication is used to indicate whether the COT is associated with a first channel access type or a second channel access type, wherein the first channel access type is associated with sidelink transmissions aligned across the UE group, and wherein the second channel access type is associated with determining a transmission start point for sidelink communications based at least in part on a priority associated with the first UE (block 1120). For example, a first UE (e.g., using Fig.13The communication manager 140 and / or the sending component 1304 depicted in the figure can send a COT sharing indication to the second UE group to enable the second UE group to utilize a portion of the COT, as described above. In some aspects, the first channel access type is associated with aligning sidelink transmissions across UE groups. In some aspects, the second channel access type is associated with determining a transmission starting point for sidelink communication based at least in part on a priority associated with the first UE.

[0199] Process 1100 may include additional aspects, such as any single aspect and / or any combination of the aspects described below and / or in combination with one or more other processes described elsewhere herein.

[0200] In a first aspect, an indicator is included in the COT sharing indication to indicate that the COT is associated with a first channel access type, and the absence of the indicator in the COT sharing indication indicates that the COT is associated with a second channel access type.

[0201] In a second aspect, an indicator is included in the COT sharing indication, and the indicator includes a set of one or more bits indicating an entry in a table, wherein the entry indicates one or more of a transmission start point, a cyclic prefix extension, an automatic gain control puncturing value, a channel access type, or a sensing duration.

[0202] although Fig.11 Example blocks of process 1100 are shown, but in some aspects process 1100 may include Fig.11 The blocks of process 1100 may include additional blocks, fewer blocks, different blocks, or blocks arranged in a different manner than those depicted in process 1100. Additionally or alternatively, two or more of the blocks of process 1100 may be executed in parallel.

[0203] Fig.12 1 is a diagram of an example apparatus 1200 for wireless communication according to the present disclosure. Apparatus 1200 may be a first UE (e.g., UE 120r), or the first UE may include apparatus 1200. In some aspects, apparatus 1200 includes a receiving component 1202 and a transmitting component 1204 that may communicate with each other (e.g., via one or more buses, and / or one or more other components). As shown, apparatus 1200 may communicate with another apparatus 1206 (e.g., a UE, a base station, or another wireless communication device) using receiving component 1202 and transmitting component 1204. As further shown, apparatus 1200 may include a communication manager 140. Communication manager 140 may include, among other things, a determining component 1208.

[0204] In some aspects, the apparatus 1200 may be configured to perform the Figure 5-Figure 9Additionally or alternatively, the apparatus 1200 may be configured to perform one or more of the processes described herein, such as Fig.10 In some aspects, in Fig.12 The apparatus 1200 and / or one or more components shown in FIG. 1 may include a combination of Figure 2 One or more components of the first UE described. Additionally or alternatively, Fig.12 One or more of the components shown may be in combination Figure 2 In addition or alternatively, one or more components in the component set may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or codes stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the function or operation of the component.

[0205] The receiving component 1202 may receive communications from the apparatus 1206, such as reference signals, control information, data communications, or a combination thereof. The receiving component 1202 may provide the received communications to one or more other components of the apparatus 1200. In some aspects, the receiving component 1202 may perform signal processing (such as filtering, amplifying, demodulating, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalizing, interference cancellation, or decoding, etc.) on the received communications and may provide the processed signals to one or more other components of the apparatus 1200. In some aspects, the receiving component 1202 may include combining Figure 2 One or more antennas, modems, demodulators, MIMO detectors, receive processors, controllers / processors, memories, or combinations thereof of a first UE are described.

[0206] The transmitting component 1204 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 1206. In some aspects, one or more other components of the apparatus 1200 may generate communications and may provide the generated communications to the transmitting component 1204 for transmission to the apparatus 1206. In some aspects, the transmitting component 1204 may perform signal processing (such as filtering, amplifying, modulating, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, etc.) on the generated communications and may transmit the processed signals to the apparatus 1206. In some aspects, the transmitting component 1204 may include combining Figure 2 One or more antennas, modems, modulators, transmit MIMO processors, transmit processors, controllers / processors, memories, or combinations thereof of the described first UE. In some aspects, the transmit component 1204 can be collocated with the receive component 1202 in a transceiver.

[0207] The receiving component 1202 may receive a COT sharing indication from the second UE. The determining component 1208 may determine whether the COT is associated with a first channel access type or a second channel access type based at least in part on receiving the COT sharing indication, wherein the first channel access type is associated with sidelink transmissions aligned across a group of UEs, and wherein the second channel access type is associated with determining a transmission starting point for sidelink communication based at least in part on a priority associated with the first UE. The sending component 1204 may attempt to send the sidelink communication at a transmission starting point, wherein the transmission starting point corresponds to a common starting point utilized by the group of UEs based at least in part on the COT being associated with the first channel access type, or wherein the transmission starting point is selected from one or more transmission starting points in the COT based at least in part on the COT being associated with the second channel access type.

[0208] Determining component 1208 may determine the transmission starting point based at least in part on the priority associated with the sidelink communication and a mapping of the transmission starting point to one or more priorities associated with the sidelink communication.

[0209] Determining component 1208 can determine a transmission starting point based at least in part on a reference transmission.

[0210] Determining component 1208 can determine a transmission starting point based at least in part on an end of transmission of the COT sharing indication.

[0211] Determining component 1208 can determine a transmission starting point based at least in part on an end of transmission of a response to a communication sent by the second UE.

[0212] Determining component 1208 can determine a transmission starting point based at least in part on a first priority associated with the sidelink communication and a priority associated with the COT.

[0213] Determining component 1208 can determine the transmission starting point based at least in part on one or more of the following: the transmission starting point associated with the resource reservation is indicated in the sidelink control information associated with the resource reservation, the priority associated with the resource reservation, or a default transmission starting point associated with the first channel access type.

[0214] exist Fig.12 The number and arrangement of components shown in are provided as examples. In practice, there may be Fig.12 Additional components, fewer components, different components, or differently arranged components than those shown in FIG. Fig.12 Two or more components shown in the figure may be implemented in a single component, or Fig.12A single component shown in can be implemented as multiple distributed components. Additionally or alternatively, Fig.12 The collection of (one or more) components shown in can perform the operations described in Fig.12 One or more functions performed by another set of components shown in .

[0215] Fig.13 1 is a diagram of an example apparatus 1300 for wireless communication according to the present disclosure. Apparatus 1300 may be a first UE (e.g., UE 120i), or the first UE may include apparatus 1300. In some aspects, apparatus 1300 includes a receiving component 1302 and a transmitting component 1304 that may communicate with each other (e.g., via one or more buses, and / or one or more other components). As shown, apparatus 1300 may communicate with another apparatus 1306 (e.g., a UE, a base station, or another wireless communication device) using receiving component 1302 and transmitting component 1304. As further shown, apparatus 1300 may include a communication manager 140. Communication manager 140 may include, among other things, an acquisition component 1308.

[0216] In some aspects, the apparatus 1300 may be configured to perform the Figure 5-Figure 9 Additionally or alternatively, the apparatus 1300 may be configured to perform one or more of the processes described herein, such as Fig.11 In some aspects, the process 1100 Fig.13 The apparatus 1300 and / or one or more components shown in the figure may include the above-mentioned Figure 2 One or more components of the first UE described. Additionally or alternatively, Fig.13 One or more of the components shown may be in combination Figure 2 In addition or alternatively, one or more components in the component set may be at least partially implemented as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or codes stored in a non-transitory computer-readable medium that can be executed by a controller or processor to perform the function or operation of the component.

[0217] The receiving component 1302 may receive communications from the apparatus 1306, such as reference signals, control information, data communications, or a combination thereof. The receiving component 1302 may provide the received communications to one or more other components of the apparatus 1300. In some aspects, the receiving component 1302 may perform signal processing (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding) on ​​the received communications and may provide the processed signals to one or more other components of the apparatus 1300. In some aspects, the receiving component 1302 may include combining Figure 2 One or more antennas, modems, demodulators, MIMO detectors, receive processors, controllers / processors, memories, or combinations thereof of a first UE are described.

[0218] Transmit component 1304 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to apparatus 1306. In some aspects, one or more other components of apparatus 1300 may generate communications and may provide the generated communications to transmit component 1304 for transmission to apparatus 1306. In some aspects, transmit component 1304 may perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding) on ​​the generated communications and may transmit the processed signals to apparatus 1306. In some aspects, transmit component 1304 may include combining Figure 2 One or more antennas, modems, modulators, transmit MIMO processors, transmit processors, controllers / processors, memories, or combinations thereof of the described first UE. In some aspects, the transmit component 1304 can be collocated with the receive component 1302 in a transceiver.

[0219] The acquiring component 1308 can acquire the COT. The sending component 1304 can send a COT sharing indication to the second UE group to enable the second UE group to utilize a portion of the COT, wherein the COT sharing indication is used to indicate whether the COT is associated with a first channel access type or a second channel access type, wherein the first channel access type is associated with sidelink transmissions aligned across the UE group, and wherein the second channel access type is associated with determining a transmission starting point for sidelink communication based at least in part on a priority associated with the first UE.

[0220] exist Fig.13 The number and arrangement of components shown in are provided as examples. In practice, there may be Fig.13 Additional components, fewer components, different components, or differently arranged components than those shown in FIG. Fig.13 Two or more components shown in the figure may be implemented in a single component, or Fig.13 The single component shown in can be implemented as multiple distributed components. Additionally or alternatively, Fig.13 The collection of (one or more) components shown in can perform the operations described by Fig.13 One or more functions performed by another set of components shown in .

[0221] The following provides an overview of some aspects of the disclosure:

[0222] Aspect 1: A method of wireless communication performed by an apparatus of a first UE (e.g., UE 120r), comprising: receiving a COT sharing indication from a second UE; determining whether the COT is associated with a first channel access type or a second channel access type based at least in part on receiving the COT sharing indication, wherein the first channel access type is associated with a sidelink transmission aligned across a UE group, and wherein the second channel access type is associated with a transmission starting point for sidelink communication determined at least in part based on a priority associated with the first UE; and attempting to send sidelink communication at the transmission starting point, wherein the transmission starting point corresponds to a common starting point utilized by the UE group based at least in part on the COT being associated with the first channel access type, or wherein the transmission starting point is selected from one or more transmission starting points in the COT based at least in part on the COT being associated with the second channel access type.

[0223] Aspect 2: A method according to Aspect 1, wherein determining whether the COT is associated with the first channel access type or the second channel access type includes: determining whether the COT is associated with the first channel access type or the second channel access type based at least in part on whether an indicator is included in the COT sharing indication.

[0224] Aspect 3: A method according to Aspect 2, wherein the indicator is associated with a first channel access type based at least in part on the COT, and comprises a set of one or more bits indicating an entry in a table, wherein the entry indicates one or more of a transmission start point, a cyclic prefix extension, an automatic gain control puncturing value, a channel access type, or a sensing duration.

[0225] Aspect 4: A method according to Aspect 2, wherein the COT is associated with a first channel access type based at least in part on including an indicator in a COT sharing indication, or wherein the COT is associated with a second channel access type based at least in part on not including an indicator in the COT sharing indication.

[0226] Aspect 5: A method according to one or more aspects of Aspects 1 to 4, wherein determining whether the COT is associated with the first channel access type or the second channel access type includes: determining whether the COT is associated with the first channel access type or the second channel access type based at least in part on a resource allocation associated with the COT.

[0227] Aspect 6: A method according to Aspect 5, wherein determining whether the COT is associated with the first channel access type or the second channel access type includes: determining whether the COT is associated with the first channel access type or the second channel access type based at least in part on the number of subchannels associated with the resource allocation.

[0228] Aspect 7: A method according to one or more aspects of Aspects 1 to 6, wherein determining whether the COT is associated with the first channel access type or the second channel access type includes: determining whether the COT is associated with the first channel access type or the second channel access type based at least in part on the number of UEs associated with the COT.

[0229] Aspect 8: A method according to one or more aspects of Aspects 1 to 7, wherein the COT sharing indication is used to indicate the number of UEs that can share the COT, and wherein, based at least in part on the number of UEs being greater than a threshold number, the COT is associated with a second channel access type.

[0230] Aspect 9: A method according to one or more aspects of Aspects 1 to 8, wherein a COT sharing indication is sent to a UE group, and wherein, based at least in part on the number of UEs included in the UE group being greater than a threshold number, the COT is associated with a second channel access type.

[0231] Aspect 10: A method according to one or more aspects of Aspects 1 to 9, wherein determining whether the COT is associated with a first channel access type or a second channel access type includes: determining whether the COT is associated with the first channel access type or the second channel access type based at least in part on whether the COT is associated with resource reservation.

[0232] Aspect 11: A method according to Aspect 10, wherein a COT sharing indication is sent to a first UE and a third UE, and wherein determining whether the COT is associated with a first channel access type or a second channel access type includes: determining that the channel access type includes a first channel access type based at least in part on the COT being associated with a resource reservation associated with a third UE and within the COT.

[0233] Aspect 12: The method according to one or more aspects of Aspects 1 to 11 also includes: determining a transmission start point based at least in part on a priority associated with the sidelink communication and a mapping of the transmission start point to one or more priorities associated with the sidelink communication.

[0234] Aspect 13: The method according to aspect 12, wherein the one or more priorities are a single priority.

[0235] Aspect 14: The method according to aspect 12, wherein the one or more priorities include a plurality of priorities, and wherein each priority in the plurality of priorities is mapped to a different transmission starting point.

[0236] Aspect 15: A method according to Aspect 12, wherein the first UE fails to decode the COT sharing indication, or determines that the channel access process fails to be completed before the first transmission start point in the transmission start point that is mapped to the priority of the sidelink communication, and wherein determining the transmission start point includes: determining the transmission start point based at least in part on the transmission start point being mapped to a priority that is the same as the priority associated with the same sidelink communication or being mapped to a priority that is lower than the priority associated with the sidelink communication.

[0237] Aspect 16: A method according to Aspect 12, wherein the mapping includes a first mapping based at least in part on the COT being associated with a first channel access type, and the mapping includes a second mapping different from the first mapping based at least in part on the COT being associated with a second channel access type.

[0238] Aspect 17: The method according to aspect 12, wherein the mapping is preconfigured in the first UE or the mapping is signaled by a network entity.

[0239] Aspect 18: The method according to one or more of aspects 1 to 17, further comprising: determining a transmission starting point based at least in part on a reference transmission.

[0240] Aspect 19: The method according to one or more aspects of aspects 1 to 18, further comprising: determining a transmission starting point based at least in part on an end of transmission of a COT sharing indication.

[0241] Aspect 20: The method according to one or more aspects of aspects 1 to 19 further includes: determining the transmission starting point based at least in part on the end of the transmission of the response to the communication sent by the second UE.

[0242] Aspect 21: The method according to one or more of aspects 1 to 20, wherein the transmission start point is located in the gap symbol and is achieved via cyclic prefix extension.

[0243] Aspect 22: The method according to one or more aspects of aspects 1 to 21, wherein the transmission start point is located in an AGC symbol and is achieved via AGC symbol puncturing.

[0244] Aspect 23: The method according to one or more aspects of aspects 1 to 22 also includes: determining a transmission starting point based at least in part on the first priority associated with the sidelink communication and the priority associated with the COT.

[0245] Aspect 24: A method according to one or more aspects of Aspects 1 to 23, wherein the first UE determines that the channel access process failed to be completed before the transmission start point, and wherein the method further includes: determining a next transmission start point at least in part based on determining that the channel access process failed to be completed before the transmission start point; and attempting to send sidelink communication based at least in part on the next transmission start point.

[0246] Aspect 25: A method according to Aspect 24, wherein a transmission start point is determined at least in part based on a first mapping of a transmission start point to a priority associated with a sidelink communication, and a next transmission start point is determined at least in part based on a second mapping of a transmission start point to a priority associated with a sidelink communication.

[0247] Aspect 26: The method of aspect 24, wherein the gap between the reference transmission and the next transmission starting point is greater than or equal to an amount of time associated with performing a channel access procedure.

[0248] Aspect 27: The method of aspect 24, wherein attempting to transmit a sidelink communication comprises performing sensing associated with a channel access procedure prior to or starting from a gap symbol.

[0249] Aspect 28: A method according to one or more of aspects 1 to 27, wherein the transmission start point is associated with a channel access sensing structure based at least in part on an amount of time between an end of a reference transmission and a time corresponding to the transmission start point.

[0250] Aspect 29: The method according to aspect 26, wherein the COT sharing indication is used to indicate a time slot index corresponding to an end of the reference transmission.

[0251] Aspect 30: A method according to one or more aspects of Aspects 1 to 29, wherein the COT is associated with a resource reservation, wherein the COT is associated with a first channel access type based at least in part on the association of the COT with the resource reservation, and wherein the method further comprises: determining a transmission starting point based at least in part on a transmission starting point associated with the resource reservation.

[0252] Aspect 31: The method according to Aspect 30 also includes: determining the transmission starting point based at least in part on one or more of the following: the transmission starting point associated with the resource reservation is indicated in the side link control information associated with the resource reservation, the priority associated with the resource reservation, or the default transmission starting point associated with the first channel access type.

[0253] Aspect 32: A method according to one or more aspects of aspects 1 to 31, wherein the first channel access type is associated with a maximum number of subchannels that can be selected by the first UE for transmission of sidelink communication.

[0254] Aspect 33: A method according to Aspect 32, wherein the maximum number of subchannels is pre-configured in the first UE, signaled by the network entity via radio resource control (RRC) signaling, or signaled by the second UE via PC-5RRC signaling.

[0255] Aspect 34: The method according to aspect 32, wherein the COT sharing indication and inter-UE coordination signaling are used to indicate the preferred set of resources to be used by the first UE.

[0256] Aspect 35: A method of wireless communication performed by an apparatus of a first UE (e.g., UE 120i), comprising: obtaining a COT; and sending a COT sharing indication to a second UE group to enable the second UE group to utilize a portion of the COT, wherein the COT sharing indication is used to indicate whether the COT is associated with a first channel access type or a second channel access type, wherein the first channel access type is associated with sidelink transmissions aligned across UE groups, and wherein the second channel access type is associated with determining a transmission start point for sidelink communication based at least in part on a priority associated with the first UE.

[0257] Aspect 36: A method according to aspect 35, wherein an indicator for indicating that the COT is associated with a first channel access type is included in the COT sharing indication, and wherein the absence of the indicator in the COT sharing indication indicates that the COT is associated with a second channel access type.

[0258] Aspect 37: A method according to Aspect 36, wherein the indicator is included in the COT sharing indication, and wherein the indicator comprises a set of one or more bits indicating an entry in an indication table, wherein the entry indicates one or more of a transmission start point, a cyclic prefix extension, an automatic gain control puncturing value, a channel access type, or a sensing duration.

[0259] Aspect 38: An apparatus for wireless communication at a device, 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 a method according to one or more of Aspects 1 to 34.

[0260] Aspect 39: An apparatus for wireless communication, comprising a memory and one or more processors coupled to the memory, the one or more processors configured to execute the method according to one or more of aspects 1 to 34.

[0261] Aspect 40: An apparatus for wireless communication, comprising at least one unit for performing the method according to one or more of aspects 1 to 34.

[0262] Aspect 41: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method according to one or more of aspects 1 to 34.

[0263] Aspect 42: A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform a method according to one or more of aspects 1 to 34.

[0264] Aspect 43: An apparatus for wireless communication at a device, 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 a method according to one or more of Aspects 35 to 37.

[0265] Aspect 44: An apparatus for wireless communication, comprising a memory and one or more processors coupled to the memory, the one or more processors configured to perform the method according to one or more of aspects 35 to 37.

[0266] Aspect 45: An apparatus for wireless communication, comprising at least one unit for performing the method according to one or more of aspects 35 to 37.

[0267] Aspect 46: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method according to one or more of aspects 35 to 37.

[0268] Aspect 47: A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform a method according to one or more of aspects 35 to 37.

[0269] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired from practice of these aspects.

[0270] As used herein, the term "component" is intended to be broadly interpreted 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 broadly interpreted as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, processes and / or functions, etc. As used herein, a "processor" is implemented in a combination of hardware and / or hardware and software. It will be apparent that the system and / or method described herein can be implemented in a combination of hardware and / or hardware and software in different forms. The actual dedicated control hardware or software code for implementing these systems and / or methods is not a limitation to various aspects. Therefore, the operation and behavior of the system and / or method are described herein without reference to a specific software code, because those skilled in the art will understand that software and hardware can be designed to implement a system and / or method based at least in part on the description herein.

[0271] As used herein, depending on the context, "satisfying a threshold" may mean that a value is greater than a threshold, greater than or equal to a threshold, less than a threshold, less than or equal to a threshold, equal to a threshold, not equal to a threshold, etc.

[0272] Although the combination of features is recorded in the claims or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. Many features in these features can be combined in a manner not specifically recorded in the claims and / or not disclosed in the specification. The disclosure of various aspects includes each dependent claim combined with each other claim in the claim set. As used herein, the phrase of "at least one of" 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, and any combination with the multiple of the same element (for example, 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 sorting of a, b and c).

[0273] Any element, action or instruction used herein should not be interpreted as critical or necessary unless clearly stated. In addition, as used herein, the articles "a" and "an" are intended to include one or more items and can be used interchangeably with "one or more". In addition, as used herein, the article "the" is intended to include one or more items related to the article "the" mentioned, and can be used interchangeably with "one or more". In addition, as used herein, the terms "set" and "group" are intended to include one or more items and can be used interchangeably with "one or more". In the case of intending only one item, the phrase "only one" or similar terms are used. Moreover, as used herein, the terms "has", "have", "having" etc. are intended to be open terms, which do not limit the elements modified by them (for example, "an element having" A can also have B). In addition, the phrase "based on" is intended to mean "based at least in part on", unless otherwise explicitly stated. Furthermore, as used herein, the term "or" when used in a series is intended to be inclusive and may be used interchangeably with "and / or" unless expressly stated otherwise (e.g., if used in conjunction with "any of" or "only one of").

Claims

1. A method of wireless communication performed by a first user equipment (UE) apparatus, comprising: receiving a channel occupancy time (COT) sharing indication from a second UE; determining, based at least in part on receiving the COT sharing indication, whether the COT is associated with a first channel access type or a second channel access type, wherein the first channel access type is associated with aligning sidelink transmissions across a group of UEs, and wherein the second channel access type is associated with determining a transmission starting point for sidelink communications based at least in part on a priority associated with the first UE; and Attempting to send a sidelink communication at the transmission starting point, wherein the transmission starting point corresponds to a common starting point utilized by the group of UEs based at least in part on the COT being associated with the first channel access type, or wherein the transmission starting point is selected from one or more transmission starting points in the COT based at least in part on the COT being associated with the second channel access type.

2. The method according to claim 1, wherein: Determining whether the COT is associated with the first channel access type or the second channel access type includes: Whether the COT is associated with the first channel access type or the second channel access type is determined based at least in part on whether an indicator is included in the COT sharing indication.

3. The method according to claim 2, wherein: Based at least in part on the COT being associated with the first channel access type, the indicator comprises a set of one or more bits indicating an entry in a table, wherein the entry indicates one or more of the transmission start point, cyclic prefix extension, automatic gain control puncturing value, channel access type, or sensing duration.

4. The method according to claim 2, wherein: The COT is associated with the first channel access type based at least in part on including the indicator in the COT sharing indication, or The COT is associated with the second channel access type based at least in part on not including the indicator in the COT sharing indication.

5. The method according to claim 1, wherein: Determining whether the COT is associated with the first channel access type or the second channel access type includes: A determination is made whether the COT is associated with the first channel access type or the second channel access type based at least in part on a resource allocation associated with the COT.

6. The method according to claim 5, wherein: Determining whether the COT is associated with the first channel access type or the second channel access type includes: Whether the COT is associated with the first channel access type or the second channel access type is determined based at least in part on a number of subchannels associated with the resource allocation.

7. The method according to claim 1, wherein: Determining whether the COT is associated with the first channel access type or the second channel access type includes: Whether the COT is associated with the first channel access type or the second channel access type is determined based at least in part on a number of UEs associated with the COT.

8. The method according to claim 1, wherein: The COT sharing indication is used to indicate the number of UEs that can share the COT, and Wherein, based at least in part on the number of UEs being greater than a threshold number, the COT is associated with the second channel access type.

9. The method according to claim 1, wherein: The COT sharing indication is sent to the UE group, and The COT is associated with the second channel access type based at least in part on the fact that the number of UEs included in the UE group is greater than a threshold number.

10. The method according to claim 1, wherein: Determining whether the COT is associated with the first channel access type or the second channel access type includes: Whether the COT is associated with the first channel access type or the second channel access type is determined based at least in part on whether the COT is associated with resource reservation.

11. The method according to claim 10, wherein: The COT sharing indication is sent to the first UE and the third UE, and wherein determining whether the COT is associated with the first channel access type or the second channel access type comprises: The COT is determined to be associated with the first channel access type based at least in part on the COT being associated with the resource reservation associated with the third UE and within the COT.

12. The method according to claim 1, further comprising: The transmission starting point is determined based at least in part on a priority level associated with the sidelink communication and a mapping of transmission starting points to one or more priorities associated with the sidelink communication.

13. The method according to claim 12, wherein: The sidelink communication is associated with a first priority, the method further comprising: determining a number of consecutive unsuccessful access procedures associated with the sidelink communication; and The transmission starting point is determined based at least in part on a second priority based at least in part on the number of consecutive unsuccessful access procedures, wherein the second priority is a higher priority relative to the first priority.

14. The method according to claim 12, wherein: The one or more priorities include a plurality of priorities, and wherein each priority of the plurality of priorities is mapped to a different transmission starting point.

15. The method according to claim 12, wherein: The first UE fails to decode the COT sharing indication, or determines that a channel access procedure fails to be completed before a first transmission starting point of the transmission starting points mapped to the priority of the sidelink communication, and wherein determining the transmission starting point comprises: The transmission start point is determined at least in part based on the transmission start point being mapped to a priority that is the same priority as the priority associated with the sidelink communication or being mapped to a priority that is a lower priority relative to the priority associated with the sidelink communication.

16. The method according to claim 12, wherein: The mapping includes a first mapping based at least in part on the COT being associated with the first channel access type, and the mapping includes a second mapping different from the first mapping based at least in part on the COT being associated with the second channel access type.

17. The method according to claim 12, wherein: The mapping is preconfigured in the first UE or the mapping is signaled by a network entity.

18. The method of claim 1, further comprising: The transmission starting point is determined based at least in part on a reference transmission.

19. The method of claim 1, further comprising: The transmission starting point is determined based at least in part on an end of transmission of the COT sharing indication.

20. The method of claim 1, further comprising: The transmission starting point is determined based at least in part on an end of transmission of a response to a communication sent by the second UE.

21. The method according to claim 1, wherein: The transmission starting point is located in the gap symbol and is achieved via cyclic prefix extension.

22. The method according to claim 1, wherein: The transmission start point is located in an automatic gain control (AGC) symbol and is achieved through AGC symbol puncturing.

23. The method of claim 1, further comprising: The transmission starting point is determined based at least in part on a first priority associated with the sidelink communication and a priority associated with the COT.

24. The method according to claim 1, wherein: The first UE determines that a channel access procedure cannot be completed before the transmission start point, and wherein the method further comprises: determining a next transmission starting point based at least in part on determining that the channel access procedure failed to complete prior to the transmission starting point; and Attempting to send the sidelink communication is performed based at least in part on the next transmission starting point.

25. The method according to claim 24, wherein: The transmission starting point is determined based at least in part on a first mapping of transmission starting points to priorities associated with sidelink communications, and the next transmission starting point is determined based at least in part on a second mapping of transmission starting points to priorities associated with sidelink communications.

26. The method according to claim 24, wherein: A gap between a reference transmission and the next transmission starting point is greater than or equal to an amount of time associated with performing the channel access procedure.

27. The method according to claim 24, wherein: Attempting to send the sidelink communication comprises: Sensing associated with the channel access procedure is performed before or starting from a gap symbol.

28. The method of claim 1, wherein: The transmission starting point is associated with a channel access sensing structure based at least in part on an amount of time between an end of a reference transmission and a time corresponding to the transmission starting point.

29. The method according to claim 28, wherein: The COT sharing indication is used to indicate a time slot index corresponding to the end of the reference transmission.

30. The method of claim 1, wherein: The COT is associated with a resource reservation, wherein the COT is associated with the first channel access type based at least in part on the COT being associated with the resource reservation, and wherein the method further comprises: The transmission starting point is determined based at least in part on a transmission starting point associated with the resource reservation.

31. The method of claim 30, further comprising: determining the transmission starting point associated with the resource reservation based at least in part on one or more of: the transmission starting point associated with the resource reservation is indicated in sidelink control information associated with the resource reservation, a priority associated with the resource reservation, or A default transmission starting point associated with the first channel access type.

32. The method of claim 1, wherein: The first channel access type is associated with a maximum number of subchannels that can be selected by the first UE for transmission of the sidelink communication.

33. The method of claim 32, wherein: The maximum number of subchannels is preconfigured in the first UE, signaled by a network entity via Radio Resource Control (RRC) signaling, or signaled by the second UE via PC-5 RRC signaling.

34. The method of claim 32, wherein: The COT sharing indication and inter-UE coordination signaling are used to indicate a preferred set of resources to be used by the first UE.

35. A method of wireless communication performed by an apparatus of a first user equipment (UE), comprising: Get channel occupation time (COT); as well as Sending a COT sharing indication to a second UE group to enable the second UE group to utilize a portion of the COT, wherein the COT sharing indication is used to indicate whether the COT is associated with a first channel access type or a second channel access type, wherein the first channel access type is associated with sidelink transmissions aligned across UE groups, and wherein the second channel access type is associated with determining a transmission start point for sidelink communications based at least in part on a priority associated with the first UE.

36. The method of claim 35, wherein: An indicator for indicating that the COT is associated with the first channel access type is included in the COT sharing indication, and wherein the absence of the indicator in the COT sharing indication indicates that the COT is associated with the second channel access type.

37. The method of claim 36, wherein: The indicator is included in the COT sharing indication, and wherein the indicator comprises a set of one or more bits indicating an entry in a table, wherein the entry indicates one or more of the transmission start point, cyclic prefix extension, automatic gain control puncturing value, channel access type, or sensing duration.

38. An apparatus for a first user equipment (UE) for wireless communication, comprising: Memory; as well as one or more processors coupled to the memory, the one or more processors configured to: receiving a channel occupancy time (COT) sharing indication from a second UE; determining whether the COT is associated with a first channel access type or a second channel access type based at least in part on receiving the COT sharing indication, wherein the first channel access type is associated with sidelink transmissions directed across a UE group, and wherein the second channel access type is associated with determining a transmission starting point for sidelink communication based at least in part on a priority associated with the first UE; and attempting to send a sidelink communication at said transmission starting point, wherein the transmission starting point corresponds to a common starting point utilized by the group of UEs based at least in part on the COT being associated with the first channel access type, or The transmission starting point is selected from one or more transmission starting points in the COT based at least in part on the COT being associated with the second channel access type.

39. An apparatus for a first user equipment (UE) for wireless communication, comprising: Memory; as well as one or more processors coupled to the memory, the one or more processors configured to: Get channel occupation time (COT); as well as sending a COT sharing indication to a second UE group to enable the second UE group to utilize a portion of the COT, wherein the COT sharing indication is used to indicate whether the COT is associated with a first channel access type or a second channel access type, wherein the first channel access type is associated with sidelink transmissions aligned across UE groups, and The second channel access type is associated with determining a transmission starting point for sidelink communication based at least in part on a priority associated with the first UE.

40. A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising: One or more instructions that, when executed by one or more processors of a first user equipment (UE), cause the first UE to: receiving a channel occupancy time (COT) sharing indication from a second UE; determining whether the COT is associated with a first channel access type or a second channel access type based at least in part on receiving the COT sharing indication, wherein the first channel access type is associated with sidelink transmissions directed across a UE group, and wherein the second channel access type is associated with determining a transmission starting point for sidelink communication based at least in part on a priority associated with the first UE; and attempting to send a sidelink communication at said transmission starting point, wherein the transmission starting point corresponds to a common starting point utilized by the group of UEs based at least in part on the COT being associated with the first channel access type, or The transmission starting point is selected from one or more transmission starting points in the COT based at least in part on the COT being associated with the second channel access type.

41. A non-transitory computer readable medium storing a set of instructions for wireless communication, the set of instructions comprising: One or more instructions that, when executed by one or more processors of a first user equipment (UE), cause the first UE to: Get channel occupation time (COT); as well as Sending a COT sharing indication to a second UE group to enable the second UE group to utilize a portion of the COT, wherein the COT sharing indication is used to indicate whether the COT is associated with a first channel access type or a second channel access type, wherein the first channel access type is associated with sidelink transmissions aligned across UE groups, and wherein the second channel access type is associated with determining a transmission start point for sidelink communications based at least in part on a priority associated with the first UE.

42. A first apparatus for wireless communication, comprising: means for receiving a channel occupancy time (COT) sharing indication from a second device; means for determining, based at least in part on receiving the COT sharing indication, whether the COT is associated with a first channel access type or a second channel access type, wherein the first channel access type is associated with aligning sidelink transmissions across a group of devices, and wherein the second channel access type is associated with determining a transmission start point for sidelink communications based at least in part on a priority associated with the first device; and means for attempting to transmit a sidelink communication at the transmission starting point, wherein the transmission starting point corresponds to a common starting point utilized by the group of devices based at least in part on the COT being associated with the first channel access type, or wherein the transmission starting point is selected from one or more transmission starting points in the COT based at least in part on the COT being associated with the second channel access type.

43. A first apparatus for wireless communication, comprising: A unit for obtaining channel occupation time (COT); as well as means for sending a COT sharing indication to a second device group to enable the second device group to utilize a portion of the COT, wherein the COT sharing indication is used to indicate whether the COT is associated with the first channel access type or the second channel access type, wherein the first channel access type is associated with sidelink transmissions directed across a group of devices, and The second channel access type is associated with determining a transmission starting point for sidelink communication based at least in part on a priority associated with the first device. A default transmission starting point associated with the first channel access type.

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