Sensing Structure and Prioritization in Channel Occupancy Time Sharing for Sidelink in Unlicensed Spectrum

Abstract

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

Description

[Technical Field]

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

[0002] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple-access technologies capable of supporting 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 extensions 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 communication for wireless communication devices, such as a user equipment (UE) or multiple UEs. A UE may communicate with a network node via downlink and uplink communications. The "downlink" (or "DL") refers to the communication link from the network node to the UE, and the "uplink" (or "UL") refers to the communication link from the UE to the network node. Some wireless networks may support device-to-device communications via local links (e.g., sidelink (SL), wireless local area network (WLAN) links, and / or wireless personal area network (WPAN) links, among other examples).

[0004] The above multiple access technologies have been adopted in various telecommunications standards to provide common protocols that allow various UEs to communicate at city, national, regional, and / or global levels. New Radio (NR), sometimes referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by 3GPP®. NR is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving service, utilizing new spectrum, and using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink and 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 to better integrate with other open standards, as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. As demand for mobile broadband access continues to grow, further improvements in LTE, NR, and other radio access technologies remain useful. Summary of the Invention

[0005] In some aspects, a method of wireless communication implemented by a first user equipment (UE) device may include receiving a channel occupation 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, the first channel access type being associated with aligning sidelink transmissions across a group of UEs, or a second channel access type, the second channel access type being associated with determining a transmission start point for the sidelink communication based at least in part on a priority associated with the first UE; and attempting to transmit sidelink communication at a transmission start point, the transmission start point corresponding 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 the transmission start point 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.

[0006] In some aspects, a method of wireless communication performed by a first UE device may include acquiring a COT and transmitting a COT sharing indication to a second group of UEs to enable the second group of UEs to utilize a portion of the COT, the COT sharing indication indicating whether the COT is associated with a first channel access type, the first channel access type being associated with aligning sidelink transmissions across the group of UEs, or a second channel access type, the second channel access type being 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, wherein the one or more processors are configured to receive a COT sharing indication from a second UE; and, based at least in part on receiving the COT sharing indication, determine whether the COT is associated with a first channel access type, the first channel access type being associated with aligning sidelink transmissions across a group of UEs, or a second channel access type, the second channel access type being associated with determining a transmission start point for the sidelink communication based at least in part on a priority associated with the first UE; and attempt to transmit the sidelink communication at a transmission start point, the transmission start point corresponding 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 the transmission start point 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.

[0008] In some aspects, a first UE for wireless communication includes a memory and one or more processors coupled to the memory, wherein the one or more processors are configured to acquire a COT and transmit a COT sharing indication to a group of second UEs to enable the group of second UEs to utilize a portion of the COT, the COT sharing indication indicating whether the COT is associated with a first channel access type, the first channel access type associated with aligning sidelink transmissions across the group of UEs, or a second channel access type, the second channel access type 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 certain aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a first UE, cause the first UE to receive a COT sharing indication from a second UE and, based at least in part on receiving the COT sharing indication, determine whether the COT is associated with a first channel access type, the first channel access type being associated with aligning sidelink transmissions across a group of UEs, or a second channel access type, the second channel access type being associated with aligning sidelink transmissions across a group of UEs. determining a transmission start point for the sidelink communication based at least in part on a priority associated with the first UE; and attempting to transmit the sidelink communication at a transmission start point that corresponds to a common start point utilized by a group of UEs based at least in part on the COT being associated with the first channel access type, or that 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.

[0010] In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a first UE, cause the first UE to acquire a COT and transmit a COT sharing indication to a group of second UEs to enable a group of second UEs to utilize a portion of the COT, the COT sharing indication indicating whether the COT is associated with a first channel access type, the first channel access type being associated with aligning sidelink transmissions across the group of UEs, or a second channel access type, the second channel access type being 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 apparatus for wireless communication includes means for receiving a COT sharing indication from a second apparatus; 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, the first channel access type being associated with aligning sidelink transmissions across a group of apparatuses, or a second channel access type, the second channel access type being associated with determining a transmission start point for the sidelink communication based at least in part on a priority associated with the first apparatus; and means for attempting to transmit a sidelink communication at a transmission start point, the transmission start point corresponding to a common start point utilized by the group of apparatuses based at least in part on the COT being associated with the first channel access type, or the transmission start point 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.

[0012] In some aspects, a first apparatus for wireless communication includes means for acquiring a COT and means for transmitting a COT sharing indication to a second group of UEs to enable the second group of UEs to utilize a portion of the COT, the COT sharing indication indicating whether the COT is associated with a first channel access type, the first channel access type being associated with aligning sidelink transmissions across the group of apparatuses, or a second channel access type, the second channel access type being associated with determining a transmission start point for sidelink communication based at least in part on a priority associated with the first UE.

[0013] 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 substantially as described herein with reference to and as illustrated in the drawings and this specification.

[0014] The foregoing has outlined rather broadly the features and technical advantages of examples according to the present disclosure in order that the following Detailed Description may be better understood. Additional features and advantages will be described hereinafter. The concepts and specific examples disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The nature of the concepts disclosed herein, both their organization and method of operation, together with associated advantages, will be better understood by considering the following description in conjunction with the accompanying figures. Each of the figures is provided for the purpose of illustration and description, and not as a definition of the limits of the claims.

[0015] Although aspects are described in this disclosure by way of illustration for some examples, those skilled in the art will understand that such aspects can be implemented in many different configurations and scenarios. The techniques described herein can be implemented using a variety of platform types, devices, systems, shapes, sizes, and / or packaging configurations. For example, some aspects can be implemented via integrated chip embodiments or other non-modular component-based devices (e.g., end-user devices, vehicles, communications devices, computing devices, industrial equipment, retail / purchasing devices, medical devices, and / or artificial intelligence devices). Aspects can be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components, and / or system-level components. Devices incorporating the described aspects and features may include additional components and features for implementing and practicing the claimed and described aspects. For example, transmitting and receiving wireless signals may include one or more components (e.g., hardware components including antennas, radio frequency (RF) chains, power amplifiers, modulators, buffers, processors, interleavers, summers, and / or analog summers) for analog and digital purposes. It is contemplated that aspects described herein may be practiced in a wide variety of devices, components, systems, distributed configurations, and / or end-user devices of various sizes, shapes, and configurations.

[0016] In order that the above-listed features of the present disclosure may be understood in detail, a more detailed description, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the accompanying drawings. It should be noted, however, that the accompanying drawings illustrate only certain exemplary embodiments of the present disclosure, and therefore should not be considered as limiting the scope of the present disclosure, as the description may be incorporated into other equally effective embodiments. The same reference numbers in different drawings may identify the same or similar elements. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 illustrates an example of a wireless network according to the present disclosure. [Figure 2] FIG. 1 illustrates an example of a network node in communication with a user equipment (UE) in a wireless network according to the present disclosure. [Figure 3] FIG. 1 illustrates an example of sidelink communication according to the present disclosure. [Figure 4A] FIG. 1 illustrates an example of sidelink and access link communications according to the present disclosure. [Figure 4B] FIG. 1 illustrates an example of sidelink and access link communications according to the present disclosure. [Figure 5] 1 illustrates one or more examples of sensing structures and prioritization in channel occupation time (COT) sharing in unlicensed spectrum, in accordance with various aspects of the present disclosure. [Figure 6] 1 illustrates one or more examples of sensing structures and prioritization in channel occupation time (COT) sharing in unlicensed spectrum, in accordance with various aspects of the present disclosure. [Figure 7] 1 illustrates one or more examples of sensing structures and prioritization in channel occupation time (COT) sharing in unlicensed spectrum, in accordance with various aspects of the present disclosure. [Figure 8] 1 illustrates one or more examples of sensing structures and prioritization in channel occupation time (COT) sharing in unlicensed spectrum, in accordance with various aspects of the present disclosure. [Figure 9] 1 illustrates one or more examples of sensing structures and prioritization in channel occupation time (COT) sharing in unlicensed spectrum, in accordance with various aspects of the present disclosure. [Figure 10] FIG. 1 illustrates an example process associated with sensing structure and prioritization in COT sharing in unlicensed spectrum, according to the present disclosure. [Figure 11]FIG. 1 illustrates an example process associated with sensing structure and prioritization in COT sharing in unlicensed spectrum, according to the present disclosure. [Figure 12] FIG. 1 is a diagram of an exemplary apparatus for wireless communication in accordance with the present disclosure. [Figure 13] FIG. 1 is a diagram of an exemplary apparatus for wireless communication in accordance with the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0018] Various aspects of the present disclosure will now be described more fully with reference to the accompanying drawings. However, the present disclosure may be embodied in many different forms and should not be construed as limited to any specific structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Those skilled in the art will appreciate that the scope of the present disclosure is intended to encompass all aspects of the present disclosure disclosed herein, whether implemented independently or in combination with any other aspects of the present disclosure. For example, an apparatus can be implemented or a method can be practiced using any number of the aspects described herein. Furthermore, the scope of the present disclosure is intended to encompass such apparatuses or methods practiced using other structure, functionality, or structure and functionality in addition to or other than the various aspects of the present disclosure described herein. It should be understood that any aspect of the present disclosure disclosed herein can be embodied by one or more elements of a claim.

[0019] Several aspects of telecommunications systems will now be presented with reference to various devices and techniques. These devices and techniques are 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 particular application and design constraints imposed on the overall system.

[0020] Although aspects may be described herein using terminology commonly associated with 5G or New Radio (NR) radio access technology (RAT), aspects of the present disclosure may also be applied to other RATs, such as the 3G RAT, the 4G RAT, and / or a RAT subsequent to 5G (e.g., 6G).

[0021] 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, among other examples. 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 entities. The network nodes 110 are network nodes that communicate with the UEs 120. As shown, the network nodes 110 may include one or more network nodes. For example, network node 110 may be an aggregated network node, meaning that the aggregated network node is configured to utilize a radio protocol stack that is physically or logically integrated within a single radio access network (RAN) node (e.g., within a single device or unit). As another example, network node 110 may be a disaggregated network node (sometimes referred to as a disaggregated base station), meaning that network node 110 is configured to utilize a protocol stack that is physically or logically distributed among two or more nodes (e.g., one or more central units (CUs), one or more distributed units (DUs), or one or more radio units (RUs)).

[0022] 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 such as a DU that communicates with other network nodes 110 via a fronthaul link or a midhaul link. In some examples, the network node 110 is or includes a network node such as a CU that communicates with other network nodes 110 via a midhaul link or with a core network via a backhaul link. In some examples, the network node 110 (such as an aggregated network node 110 or a disaggregated 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 nodes 110 may include, for example, NR base stations, LTE base stations, Node Bs, eNBs (e.g., in 4G), gNBs (e.g., in 5G), access points, transmission reception points (TRPs), DUs, RUs, CUs, network mobility elements, core network nodes, network elements, network equipment, RAN nodes, or combinations thereof. In some examples, the network nodes 110 may be interconnected to each other or to one or more other network nodes 110 within the wireless network 100 through various types of fronthaul, midhaul, and / or backhaul interfaces, such as direct physical connections, air interfaces, or virtual networks, using any suitable transport network.

[0023] In some examples, a network node 110 may provide communication coverage for a particular geographic area. In the Third Generation Partnership Project (3GPP), the term “cell” can refer to the coverage area of ​​the network node 110 and / or a network node subsystem serving that coverage area, depending on the context in which the term is used. The network node 110 may provide communication coverage for a macrocell, a picocell, a femtocell, and / or another type of cell. A macrocell may cover a relatively large geographic area (e.g., a few kilometers in radius) and may allow unrestricted access by UEs 120 with service subscriptions. A picocell may cover a relatively small geographic area and may allow unrestricted access by UEs 120 with service subscriptions. A femtocell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs 120 having an association with the femtocell (e.g., UEs 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. A network node 110 for a femto cell may be referred to as a femto network node or a home network node. In the example shown in FIG. 1 , 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 multiple (e.g., three) cells. In some examples, a cell may not necessarily be fixed, and the geographic area of ​​a cell may move according to the location of a mobile network node 110 (e.g., a mobile network node).

[0024] In some aspects, the term “base station” or “network node” may refer to an aggregated base station, a non-aggregated 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 a “network node” may refer to a CU, DU, RU, a Near-Real Time (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 one device configured to perform one or more functions, such as those described herein in connection 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, multiple different devices (which may be located in the same geographic location or different geographic locations) may each be configured to perform at least a portion of the functions or to replicate the implementation of at least a portion of the functions, and the term "base station" or "network node" may refer to any one or more of those 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 and not another base station function. In this manner, a single device may include two or more base stations.

[0025] The wireless network 100 may include one or more relay stations. A relay station is a network node that can receive a data transmission from an upstream node (e.g., the network node 110 or the UE 120) and transmit the data transmission to a downstream node (e.g., the UE 120 or the network node 110). A relay station may also be a UE 120 that can relay a transmission for another UE 120. In the example shown in FIG. 1, network node 110d (e.g., a relay network node) can communicate with network node 110a (e.g., a macro network node) and UE 120d to facilitate communications between network node 110a (e.g., a macro network node) and UE 120d. A network node 110 that relays communications may also be referred to as a relay station, a relay base station, a relay network node, a relay node, a repeater, etc.

[0026] The wireless network 100 may be a heterogeneous network that includes different types of network nodes 110, such as macro network nodes, pico network nodes, femto network nodes, relay network nodes, etc. These different types of network nodes 110 may have different transmit power levels, different coverage areas, and / or different susceptibility to interference within the wireless network 100. For example, the macro network nodes may have high transmit power levels (e.g., 5 to 40 watts), while the pico network nodes, femto network nodes, and relay network nodes may have lower transmit power levels (e.g., 0.1 to 2 watts).

[0027] A network controller 130 may be coupled to or in communication 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 backhaul or midhaul communication links. The network nodes 110 may communicate with each other directly or indirectly via wireless or wired backhaul communication links. In some aspects, the network controller 130 may be or may include a CU or a core network device.

[0028] The UEs 120 may be dispersed throughout the wireless network 100, and each UE 120 may be stationary or mobile. The UEs 120 may include, for example, access terminals, terminals, mobile stations, and / or subscriber units. UE 120 may be a cellular telephone (e.g., a smartphone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, 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, smart wristband, smart jewelry (e.g., a smart ring or smart bracelet)), an entertainment device (e.g., a music device, a video device, and / or satellite radio), a vehicle component or sensor, a smart meter / sensor, industrial manufacturing equipment, a global positioning system device, a UE function of a network node, and / or any other suitable device configured to communicate over a wireless or wired medium.

[0029] Some UEs 120 may be considered machine-type communication (MTC) UEs or evolved or enhanced machine-type communication (eMTC) UEs. MTC UEs and / or eMTC UEs may include, for example, a robot, a drone, a remote device, a sensor, a meter, a monitor, and / or a location tag capable of communicating with a network node, another device (e.g., a remote device), or some other entity. Some UEs 120 may be considered Internet-of-Things (IoT) devices and / or may be implemented as narrowband IoT (NB-IoT) devices. Some UEs 120 may be considered customer premises equipment. The UE 120 may be included within a housing that houses components of the 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., memory) may be operatively coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0030] In general, any number of wireless networks 100 may be deployed within a given geographic area. Each wireless network 100 may support a particular RAT and may operate on one or more frequencies. A RAT may also be referred to as a radio technology, air interface, etc. A frequency may also be referred to as a carrier, frequency channel, etc. To avoid interference between wireless networks of different RATs, each frequency may support a single RAT within a given geographic area. In some cases, NR or 5G RAT networks may be deployed.

[0031] In some examples, two or more UEs 120 (e.g., those shown as UE 120a and UE 120e) may communicate directly (e.g., without using network node 110 as an intermediary to communicate with each other) using one or more sidelink channels. For example, the UEs 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, a vehicle-to-everything (V2X) protocol (which may include, e.g., a vehicle-to-vehicle (V2V) protocol, a vehicle-to-infrastructure (V2I) protocol, or a vehicle-to-pedestrian (V2P) protocol), and / or a mesh network. In such examples, the UEs 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by the network node 110.

[0032] Devices of wireless network 100 may communicate using an electromagnetic spectrum, which may be subdivided by frequency or wavelength into various classes, bands, channels, etc. For example, devices of wireless network 100 may communicate using one or more operating bands. In 5G NR, two initial operating bands are identified as frequency range designations FR1 (410 MHz to 7.125 GHz) and FR2 (24.25 GHz to 52.6 GHz). It should be understood that, although a portion of FR1 is above 6 GHz, FR1 is often referred to (interchangeably) as the “sub-6 GHz” band in various documents and papers. Similar nomenclature issues may arise with respect to FR2, which is often referred to (interchangeably) as the “millimeter wave” band in documents and papers, even though it is different from the extremely high frequency (EHF) band (30 GHz to 300 GHz), which is identified by the International Telecommunications Union (ITU) as the “millimeter wave” band.

[0033] Frequencies between FR1 and FR2 are often referred to as mid-band frequencies. Recent 5G NR studies have identified operating bands for these mid-band frequencies as a frequency range designated FR3 (7.125 GHz to 24.25 GHz). Frequency bands included within FR3 may inherit FR1 and / or FR2 characteristics, thus effectively extending the characteristics of FR1 and / or FR2 to the mid-band frequencies. Higher frequency bands are currently being explored to extend 5G NR operation beyond 52.6 GHz. For example, three higher operating bands have been identified as frequency ranges designated FR4a or FR4-1 (52.6 GHz to 71 GHz), FR4 (52.6 GHz to 114.25 GHz), and FR5 (114.25 GHz to 300 GHz). Each of these higher frequency bands is included within the EHF band.

[0034] With the above examples in mind, it should be understood that, unless otherwise specified, terms such as "sub-6 GHz," as used herein, may broadly refer to frequencies that may be below 6 GHz, frequencies that may be in the FR1 range, or frequencies that may include mid-band frequencies. Furthermore, unless otherwise specified, it should be understood that terms such as "millimeter wave," as used herein, may broadly refer to frequencies that may include mid-band frequencies, frequencies that may be in the FR2, FR4, FR4-a, or FR4-1, and / or FR5 ranges, or frequencies that may be in the EHF band. It is contemplated that frequencies included within these operating bands (e.g., FR1, FR2, FR3, FR4, FR4-a, FR4-1, and / or FR5) may be modified, and the techniques described herein may be applicable to those modified frequency ranges.

[0035] In some aspects, the UE 120 may include a communications manager 140. As described in more detail elsewhere herein, the communications manager 140 may perform one or more operations associated with sensing structures and prioritization in channel occupation time (COT) sharing for sidelinks in unlicensed spectrum. For example, the communications manager 140 may receive a COT sharing indication from the second UE, determine, based at least in part on receiving the COT sharing indication, whether the COT is associated with a first channel access type, the first channel access type being associated with aligning sidelink transmissions across a group of UEs, or a second channel access type, the second channel access type being 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 transmit the sidelink communication at a transmission start point that 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 that 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 communications manager 140 may perform one or more other operations described herein.

[0036] As noted above, Figure 1 is provided as an example. Other examples may differ from those described with respect to Figure 1.

[0037] 2 illustrates an example network node 110 200 communicating with a UE 120 in a wireless network 100 in accordance with the present disclosure. The network node 110 may be equipped with a set of antennas 234a through 234t, such as T antennas (T≧1). The UE 120 may be equipped with a set of antennas 252a through 252r, such as R antennas (R≧1). The network node 110 of example 200 includes one or more radio frequency components, such as the antennas 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 a radio frequency component that facilitates direct communication with the UE 120, such as one or more CUs or one or more DUs.

[0038] At the network node 110, a transmit processor 220 may receive data destined for a UE 120 (or set of UEs 120) from a data source 212. The transmit processor 220 may select one or more modulation and coding schemes (MCSs) 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) data for the UE 120 and provide data symbols to the UE 120 based at least in part on the MCS(es) selected for the UE 120. The transmit processor 220 may process system information (e.g., related to semi-static resource partitioning information (SRPI)) and control information (e.g., CQI requests, grants, and / or higher layer signaling) and provide overhead symbols and control symbols. The transmit processor 220 may generate reference symbols for a reference signal (e.g., a cell-specific reference signal (CRS) or a demodulation reference signal (DMRS)) and a synchronization signal (e.g., a primary synchronization signal (PSS) or a secondary synchronization signal (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​the 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), depicted as modems 232a through 232t.For example, each output symbol stream may be provided to a modulator component (denoted as MOD) of modem 232. Each modem 232 may use a corresponding modulator component to process the corresponding output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modem 232 may further use a corresponding modulator component to process (e.g., convert to analog, amplify, filter, and / or upconvert) the output sample stream to obtain a downlink signal. Modems 232a through 232t may transmit a set of downlink signals (e.g., T downlink signals) via a corresponding set of antennas 234 (e.g., T antennas), denoted as antennas 234a through 234t.

[0039] At the UE 120, a set of antennas 252 (depicted as antennas 252a through 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) depicted as modems 254a through 254r. For example, each received signal may be provided to a demodulator component (depicted 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 further process the input samples (e.g., for OFDM) using the demodulator component to obtain received symbols. A MIMO detector 256 may obtain received symbols from the modems 254, perform MIMO detection on the received symbols, if applicable, and provide detected symbols. The receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for the UE 120 to a data sink 260, and provide decoded control and system information to a 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 examples. In some examples, one or more components of the UE 120 may be included within a housing 284.

[0040] The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292. The network controller 130 may include, for example, one or more devices in a core network. The network controller 130 may communicate with the network node 110 via the communication unit 294.

[0041] One or more antennas (e.g., antennas 234a through 234t and / or antennas 252a through 252r) may include or be contained 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, among other examples. An antenna panel, antenna group, set of antenna elements, and / or antenna array may include one or more antenna elements (in a single housing or multiple housings), a set of coplanar antenna elements, a set of non-coplanar antenna elements, and / or one or more antenna elements coupled to one or more transmitting and / or receiving components, such as one or more components of FIG. 2.

[0042] On the uplink, at the UE 120, the transmit processor 264 may receive and process data from the data source 262 and control information from the 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 the TX MIMO processor 266, if applicable, further processed by the modem 254 (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted 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 the antenna(s) 252, the modem(s) 254, the MIMO detector 256, the receive processor 258, the transmit processor 264, and / or the TX MIMO processor 266. The transceiver may be used by a processor (e.g., controller / processor 280) and memory 282 to implement aspects of any of the methods described herein (e.g., with reference to Figures 5-13).

[0043] 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, denoted 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 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 for scheduling one or more UEs 120 for downlink and / or uplink 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 implement aspects of any of the methods described herein (e.g., with reference to FIGS. 5-13).

[0044] The controller / processor 240 of the network node 110, the controller / processor 280 of the UE 120, and / or any other component(s) of FIG. 2 may implement one or more techniques associated with sensing structures 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 any other component(s) of FIG. 2 may perform or direct the operation of, for example, process 1000 of FIG. 10, process 1100 of FIG. 11, and / or other processes as described herein. The memory 242 and the memory 282 may store data and program codes for the network node 110 and the UE 120, respectively. In some examples, the memory 242 and / or the 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, the one or more instructions, when executed by one or more processors of the network node 110 and / or the UE 120 (e.g., directly or after being compiled, translated, and / or interpreted), may cause the one or more processors, the UE 120, and / or the network node 110 to perform or direct operations of, for example, process 1000 of FIG. 10, process 1100 of FIG. 11, and / or other processes as described herein. In some examples, executing the instructions may include running the instructions, translating the instructions, compiling the instructions, and / or interpreting the instructions, among other examples.

[0045] In some aspects, the UE 120 may include means for receiving a COT sharing indication from the second UE; 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, the first channel access type being associated with aligning sidelink transmissions across a group of UEs, or a second channel access type, the second channel access type being associated with determining a transmission start point for the sidelink communication based at least in part on a priority associated with the first UE; means for attempting to transmit sidelink communication at a transmission start point, the transmission start point corresponding 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 the transmission start point 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; In some aspects, such means may include one or more components of the UE 120 described with respect to FIG. 2, such as the controller / processor 280, the transmit processor 264, the TX MIMO processor 266, the antenna 252, the modem 254, the MIMO detector 256, and the receive processor 258.

[0046] In some aspects, the UE 120 may include means for acquiring the COT, means for transmitting a COT sharing indication to the second group of UEs to enable the second group of UEs to utilize a portion of the COT, the COT sharing indication indicating whether the COT is associated with a first channel access type, the first channel access type being associated with aligning sidelink transmissions across the group of UEs, or a second channel access type, the second channel access type being associated with determining a transmission start point for sidelink communication based at least in part on a priority associated with the first UE, etc. In some aspects, such means may include one or more components of the UE 120 described with respect to FIG. 2, such as the controller / processor 280, the transmit processor 264, the TX MIMO processor 266, the antenna 252, the modem 254, the MIMO detector 256, the receive processor 258, etc.

[0047] 2 are shown as separate components, 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 transmit processor 264, receive processor 258, and / or TX MIMO processor 266 may be performed by or under the control of controller / processor 280.

[0048] As noted above, Figure 2 is provided as an example. Other examples may differ from those described with respect to Figure 2.

[0049] The deployment of a communication system, such as a 5G NR system, can be configured in multiple ways with various components or parts. In a 5G NR system or network, a network node, network entity, network mobility element, RAN node, core network node, network element, base station, or network equipment can be implemented in a centralized or disaggregated architecture. For example, a base station (such as a Node B (NB), evolved NB (eNB), NR BS, 5G NB, access point (AP), TRP, or cell, among other examples), or one or more units (or one or more components) performing base station functionality, can be implemented as a centralized base station (also known as a standalone base station or monolithic base station) or a disaggregated base station. A "network entity" or a "network node" may refer to a disaggregated base station or may refer to one or more units (such as one or more CUs, one or more DUs, one or more RUs, or a combination thereof) of a disaggregated base station.

[0050] An aggregated base station (e.g., an aggregated network node) may 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 disaggregated base station (e.g., a disaggregated network node) may be configured to utilize a protocol stack that is physically or logically distributed among two or more units (e.g., one or more CUs, one or more DUs, or one or more RUs). In some examples, a CU may be implemented within a network node, and one or more DUs may be co-located with the CU or, alternatively, may be geographically or virtually distributed throughout one or more other network nodes. A DU may be implemented to communicate with one or more RUs. Each of the CU, DU, and RU may 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), among other examples.

[0051] The operation or network design of a base station type may take into account the aggregation characteristics of base station functions. For example, disaggregated base stations may be utilized in an IAB network, an open radio access network (O-RAN, such as a network configuration supported by the O-RAN Alliance), or a virtualized radio access network (vRAN, also known as a cloud radio access network (C-RAN)) to facilitate scaling of a communication system by separating base station functions into one or more units that can be deployed independently. A disaggregated base station may include functions implemented across two or more units in various physical locations as well as functions implemented virtually in at least one unit, which may allow flexibility in network design. Various units of a disaggregated base station may be configured for wired or wireless communication with at least one other unit of the disaggregated base station.

[0052] FIG. 3 illustrates an example sidelink communication 300 in accordance with the present disclosure.

[0053] 3, a first UE 305-1 may communicate with a second UE 305-2 (and one or more other UEs 305) via one or more sidelink channels 310. The UEs 305-1 and 305-2 may communicate using one or more sidelink channels 310 for P2P communication, D2D communication, V2X communication (which may include, for example, V2V, V2I, and / or V2P communication), and / or mesh networking. In some aspects, the UEs 305 (e.g., the UEs 305-1 and / or 305-2) may correspond to one or more other UEs described elsewhere herein, such as the UE 120. In some aspects, the one or more sidelink channels 310 may use a PC5 interface and / or operate in a higher frequency band (e.g., the 5.9 GHz band). Additionally or alternatively, the UE 305 may use global navigation satellite system (GNSS) timing to synchronize the timing of transmission time intervals (TTIs) (e.g., frames, subframes, slots, or symbols).

[0054] 3, 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 communicate control information, similar to the physical downlink control channel (PDCCH) and / or physical uplink control channel (PUCCH) used for cellular communication with the network node 110 over the access link or access channel. The PSSCH 320 may be used to communicate data, similar to the physical downlink shared channel (PDSCH) and / or physical uplink shared channel (PUSCH) used for cellular communication with the network node 110 over the access link or access channel. For example, the PSCCH 315 may carry sidelink control information (SCI) 330, which may indicate various control information used for sidelink communication, such as one or more resources (e.g., time resources, frequency resources, and / or spatial resources), where a transport block (TB) 335 may be carried on the PSSCH 320. The TB 335 may include data.The PSFCH 325 may be used to communicate sidelink feedback 340 such as hybrid automatic repeat request (HARQ) feedback (e.g., acknowledgement or negative acknowledgement (ACK / NACK) information), transmit power control (TPC), and / or scheduling request (SR).

[0055] Although shown on the PSCCH 315, in some aspects the SCI 330 may include multiple communications in different stages, such as a first stage SCI (SCI-1) and a second stage SCI (SCI-2). SCI-1 may be transmitted on the PSCCH 315. SCI-2 may be transmitted on the PSSCH 320. SCI-1 may include, for example, an indication of one or more resources (e.g., time resources, frequency resources, and / or spatial resources) on the PSSCH 320, information for decoding sidelink communications on the 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 quantity of PSSCH DMRS ports, and / or a modulation and coding scheme (MCS). SCI-2 may include information associated with data transmission on 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) reporting trigger.

[0056] In some aspects, one or more sidelink channels 310 may use a resource pool. For example, a scheduling assignment (e.g., included in the SCI 330) may be transmitted in a subchannel using specific resource blocks (RBs) over time. In some aspects, a data transmission (e.g., on the PSSCH 320) associated with a scheduling assignment 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 transmitted on adjacent RBs.

[0057] In some aspects, the UE 305 may operate using a sidelink transmission mode (e.g., Mode 1), in which case resource selection and / or scheduling is 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 (e.g., in downlink control information (DCI) or in a radio resource control (RRC) message, e.g., for a configured grant) from the network node 110 (e.g., directly or via one or more network nodes) for sidelink channel access and / or scheduling. In some aspects, the UE 305 may operate using a transmission mode (e.g., Mode 2), in which case resource selection and / or scheduling is performed by the UE 305 (e.g., rather than by the network node 110). In some aspects, the UE 305 may perform resource selection and / or scheduling by detecting channel availability for transmission. For example, the UE 305 may measure received signal strength indicator (RSSI) parameters (e.g., sidelink RSSI (S-RSSI) parameters) associated with various sidelink channels, may measure reference signal received power (RSRP) parameters (e.g., PSSCH-RSRP parameters) associated with various sidelink channels, and / or may measure reference signal received quality (RSRQ) parameters (e.g., PSSCH-RSRQ parameters) associated with various sidelink channels, and may select a channel for transmission of sidelink communications based at least in part on the measurement(s).

[0058] 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 ratio (CBR) associated with various sidelink channels, which may be used for rate control (e.g., by indicating the maximum number of resource blocks the UE 305 can use for a particular set of subframes).

[0059] 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 transmit the grant in the SCI 330. The sidelink grant may indicate one or more parameters (e.g., transmission parameters) to be used for the next sidelink transmission, such as one or more resource blocks to be used for the next sidelink transmission on the PSSCH 320 (e.g., for the TB 335), one or more subframes to be used for the next sidelink transmission, and / or a modulation and coding scheme (MCS) to be used for the next 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 the periodicity of the sidelink transmission. Additionally or alternatively, the UE 305 may generate a sidelink grant for event-driven scheduling, such as for on-demand sidelink messages.

[0060] As noted above, Figure 3 is provided as an example. Other examples may differ from those described with respect to Figure 3.

[0061] 4A and 4B illustrate an example 400 of sidelink and access link communications in accordance with the present disclosure.

[0062] As shown in FIG. 4A, a transmitter (Tx) / receiver (Rx) UE 405 and an Rx / Tx UE 410 may communicate with each other via a sidelink, as described above with respect to FIG. 3. As further shown, in some sidelink modes, the network node 110 may 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 may 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 may correspond to one or more UEs described elsewhere herein, such as the UE 120 of FIG. 1. 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 the network 110 and the UE 120 (e.g., via a Uu interface) may be referred to as an access link. Sidelink communications may be transmitted over the sidelink, and access link communications may be transmitted over the access link. Access link communications may be either downlink communications (from the network node 110 to the UE 120) or uplink communications (from the UE 120 to the network node 110). Furthermore, in some aspects, sidelink communications may be transmitted over the sidelink and / or access link communications may be transmitted over an access link in a licensed radio frequency (RF) spectrum, an unlicensed RF spectrum, and / or any suitable combination thereof.

[0063] For example, to meet increasing traffic demands, various efforts have been made to improve spectral efficiency in wireless networks and thereby increase network capacity (e.g., by using higher order modulation, advanced MIMO antenna technologies, multi-cell coordination techniques, etc.) Another way to potentially improve network capacity is to increase the system bandwidth. However, available spectrum in the lower frequency bands traditionally licensed or otherwise allocated to mobile network operators may be limited.

[0064] Accordingly, various technologies have been developed to enable operation of cellular radio access technologies (RATs) in unlicensed or other shared spectrum. For example, Licensed-Assisted Access (LAA) uses carrier aggregation on the downlink to combine LTE in licensed frequency bands with LTE in unlicensed frequency bands (e.g., the 2.4 and / or 5 GHz bands where Wireless Local Area Network (WLAN) or Wi-Fi devices already exist). In other examples, Enhanced LAA (eLAA) and Further Enhanced LAA (feLAA) technologies enable both uplink and downlink LTE operation in unlicensed spectrum, MultiFire is an LTE-based technology that operates in unlicensed and shared spectrum in standalone mode, NR-U enables NR operation in unlicensed spectrum, and so on. Generally, when operating a cellular RAT in an unlicensed spectrum (e.g., using LAA, eLAA, feLAA, MultiFire, and / or NR-U), one challenge that arises is the need to ensure fair coexistence with incumbent (e.g., WLAN) systems that may be operating in the unlicensed spectrum.

[0065] For example, prior to gaining access to and / or transmitting over 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) procedure to contend for access to the unlicensed channel. The LBT procedure may generally include a clear channel assessment (CCA) procedure performed to determine whether the unlicensed channel is available (e.g., not occupied by other transmitters). In particular, the CCA procedure may include detecting an energy level on the unlicensed channel and determining whether the energy level meets (e.g., is below) a threshold, sometimes referred to as an energy detection threshold, etc. When the energy level meets (e.g., neither equals nor exceeds) the threshold, the CCA procedure is deemed successful, and the transmitting device may gain access to the unlicensed channel for a duration that may be referred to as a channel occupation time (COT), during which the transmitting device may transmit without performing additional LBT operations. When the energy level does not satisfy the threshold, the CCA procedure is not successful and the contention for access to the unlicensed channel may be deemed unsuccessful.

[0066] If the CCA procedure 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 procedure 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) procedure may be utilized to increase the likelihood that the transmitting device will successfully obtain access to the unlicensed channel.

[0067] For example, a transmitting device performing eCCA procedures may perform a random amount of CCA procedures (1 to q) according to an eCCA counter. If and / or when the transmitting device detects that the channel has cleared, the transmitting device may begin a random waiting period based on the eCCA counter and begin transmitting if the channel remains clear for the random waiting period.

[0068] Thus, while wireless networks may be configured to use unlicensed spectrum to achieve faster data rates, provide a more responsive user experience, offload traffic from licensed spectrum, etc., the need to ensure fair coexistence with incumbent systems (e.g., WLAN devices) may hinder efficient use of the unlicensed spectrum. For example, even in the absence of interference, the LBT procedure used to ensure that no other devices are already using the channel may result in a delay before transmission can begin, which can degrade the user experience and result in unacceptable performance for latency- or delay-sensitive applications. Furthermore, these problems may be exacerbated when the initial CCA procedure is not successful, because the transmitting device can transmit on the channel only after performing an additional amount of CCA procedures and determining that the channel is clear and remains clear for a random waiting period. Furthermore, in some cases, the channel occupancy time obtained by the transmitting device may have a longer duration than necessary for the transmitting device to perform the desired transmission, which may lead to inefficient use of the unlicensed channel.

[0069] Thus, in some cases, a wireless network may allow channel occupation time obtained by a transmitting device to be shared with other nodes to improve access, efficiency, etc. to unlicensed channels. For example, in downlink-uplink channel occupation time sharing over an access link, network node 110 may obtain a COT through eCCA, which may be shared with one or more UEs (e.g., UE 120, UE 405, UE 410, etc.), and the UEs may then transmit uplink signals within the COT obtained by network node 110. In this case, a UE attempting to initiate an uplink transmission within the COT shared with network node 110 may perform the uplink transmission without having to perform an LBT procedure, or the UE may perform a one-off CCA with a shorter LBT procedure (e.g., a Category 2 LBT procedure when the downlink-uplink gap duration is between 16 and 25 μs, a Category 1 LBT procedure when the downlink-uplink gap duration is 16 μs or less, etc.) before performing the uplink transmission.

[0070] Additionally or alternatively, the wireless network may support uplink-downlink channel occupation time sharing over the access link, in which case UE-initiated COT (e.g., for configured granted PUSCH or scheduled uplink transmissions) may be shared with network node 110. In this manner, network node 110 may be permitted to transmit control and / or broadcast signals and / or channels intended for any UE served by 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.

[0071] Additionally or alternatively, the wireless network may support UE-to-UE COT sharing via sidelink. For example, as shown in FIG. 4B by reference numeral 415, the COT acquired by an initiator UE (e.g., UE 405) may 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 may perform transmission operations). For example, as shown in FIG. 4B, the initiator UE may use one or more sidelink resources (e.g., time and frequency resources) to transmit in a first interlace after the COT is acquired, and the responder UE (e.g., UE 410) may use sidelink frequency resources that do not overlap with the sidelink frequency resources used by the initiator UE to perform transmission operations in subsequent interlaces. Thus, as shown in FIG. 4B, FDM or interlace-based COT sharing may result in short transmission gaps between interlaces to allow other UEs to perform transmission operations in subsequent interlaces during the shared COT, and the sidelink control information transmitted by the initiator UE may carry information to support interlace-based COT sharing.

[0072] Additionally or alternatively, as indicated by reference numeral 420, inter-UE COT sharing may be enabled in a time division multiplexing (TDM) mode. In this case, the total COT may be divided into initial time periods during which the initiator UE may perform transmissions, and the transmissions may include one or more sidelink control information transmissions indicating when the initial transmission ends, the remaining duration of the COT available for sharing, etc. Thus, one or more responding UEs may monitor sidelink control information transmitted by other UEs (e.g., initiator UEs) to recover COT sharing information that can be used to perform transmissions during the time periods corresponding to the shared COT.

[0073] Thus, as described above, inter-UE COT sharing may enable better access to, more efficient use of, the unlicensed spectrum by allowing multiple UEs to transmit during the COT obtained by an initiator UE (e.g., a UE that successfully performed an LBT procedure to gain access to an unlicensed channel). However, in some cases, implementing inter-UE COT sharing may be difficult because sidelink communications generally have a strict slot structure (e.g., contention slots) that provides a limited opportunity for another UE to perform an LBT procedure prior to transmission. Furthermore, in some cases, a group of UEs may attempt to access several resources in the COT, which may increase the risk of collisions. In some cases (e.g., when the risk of collisions is relatively high), it may be beneficial to implement COT sharing using TDM. In other cases (e.g., when the risk of collisions is relatively low), it may be beneficial to implement COT sharing using FDM.

[0074] Certain aspects described herein relate to techniques and apparatus for enabling UE-to-UE channel occupation time sharing in an unlicensed spectrum by transmitting 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 with FDM) or a second channel access type (e.g., COT sharing with TDM) and / or one or more other characteristics or parameters associated with utilizing COT (e.g., COT and / or transmission start point in a sensing structure, among other examples). In this manner, an initiating UE may dynamically implement COT using different channel access types based at least in part on one or more network conditions (e.g., amount of UEs eligible to participate in COT sharing).

[0075] As indicated above, Figures 4A and 4B are given as an example, and other examples may differ from those described with respect to Figures 4A and 4B.

[0076] 5-9 illustrate one or more example sensing structures and prioritization for COT sharing in unlicensed spectrum in accordance with various aspects of the present disclosure. As shown in FIG. 5, the example(s) 500 include an initiator UE 120i that has acquired a COT for which it is permitted to transmit on an unlicensed channel and a responder UE 120r that communicates with UE 120i on the sidelink via the unlicensed channel. Furthermore, as shown in FIGS. 5-9, UE 120r may determine a channel access type and one or more transmission start points corresponding to one or more contention slots in which UE 120r can transmit sidelink communications to share the COT acquired by UE 120i.

[0077] As shown in FIG. 5 by reference numeral 505, UE 120i may acquire a COT at which UE 120i is permitted to transmit on the unlicensed channel. In some aspects, UE 120i may successfully perform an LBT procedure to acquire the COT. For example, prior to gaining access to the unlicensed channel and transmitting over that channel, UE 120i may perform an LBT procedure to contend for access to the unlicensed channel. In some aspects, the LBT procedure may include a clear channel assessment (CCA) procedure performed by UE 120i to determine whether the unlicensed channel is available (e.g., not occupied by another transmitter). In some aspects, UE 120i may detect an energy level on the unlicensed channel, and the CCA procedure may be determined to be successful if the energy level on the unlicensed channel meets (e.g., is below) a threshold. In such a case, UE 120i may gain access to the unlicensed channel to acquire a COT at which UE 120i may transmit without performing additional LBT operations.

[0078] If the energy level detected on the unlicensed channel is not sufficient (e.g., is equal to or greater than a threshold), the CCA procedure may be determined to be unsuccessful, and UE 120i may perform the CCA procedure again and acquire the COT later. Additionally or alternatively, UE 120i may acquire the COT by performing another type of channel access procedure. For example, UE 120i may acquire the COT by performing an enhanced CCA (eCCA) procedure.

[0079] UE 120r may receive COT structure information as indicated by reference numeral 510. For example, UE 120i may transmit COT structure information based at least in part on acquiring the COT. The COT structure information may indicate a resource structure (e.g., time resources and / or frequency resources) of the COT.

[0080] As indicated by reference numeral 515, UE 120i may transmit a COT sharing indication, and UE 120r may receive the COT sharing indication, to enable sharing of the 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) transmitted by UE 120i to one or more groups of UEs (e.g., a group of UEs including UE 120r).

[0081] 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 with FDM) or a second channel access type (e.g., COT sharing with TDM).

[0082] 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., the presence or absence of a flag, a set of one or more bits, and / or a direct indication of another type of channel access type). For example, the COT may be associated with a first channel access type when the COT sharing indication includes a flag, a set of one or more bits, or another type of indicator, and the COT may be associated with a second channel access type when the COT sharing indication does not include an indication of the channel access type associated with the COT.

[0083] 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.

[0084] In some aspects, the value of the set of bits may indicate an entry in a table. For example, UE 120r may maintain multiple tables associated with COT sharing. Each table may include multiple entries that indicate, among other examples, 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. UE 120r may determine the table and / or entry associated with the COT based at least in part on the set of bits.

[0085] For example, a first bit of the set of bits may indicate one table of a plurality of tables maintained by UE 120r. A second bit of the set of bits may indicate a row of the table, and a third bit of the set of bits may indicate a column of the table. UE 120r may determine a channel access type associated with the COT based at least in part on an entry corresponding to the column and row of the table indicated by the set of bits. In some aspects, the presence of the set of bits in the COT sharing indication may indicate that the COT is associated with a first channel access type, and the absence of the set of bits may indicate that the COT is associated with a second channel access type.

[0086] In some aspects, the COT sharing indication may indirectly indicate a 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 may be utilized by UE 120r to determine whether the COT is associated with a first channel access type or a second channel access type.

[0087] 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 a 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, UE 120r may determine that UE 120r is eligible to use the COT when UE 120r receives a PSSCH from UE 120i during the first portion or the non-shared portion of the COT.

[0088] 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 UE 120i's transmission. 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 the COT sharing indication.

[0089] In some aspects, UE 120r may determine whether UE 120r is eligible to use the COT based at least in part on the priority indicated in the COT sharing indication and / or the priority of UE 120r's transmission. For example, UE 120r may determine that UE 120r is eligible to use the COT to transmit a particular transmission when the priority associated with the particular transmission is equal to or greater than the priority indicated in the COT sharing indication.

[0090] In some aspects, UE 120r may determine whether UE 120r is eligible to use the COT based at least in part on whether the COT should be utilized for a transmission to UE 120i. For example, UE 120r may determine that UE 120r is eligible to use the COT when UE 120r should use the COT to send a transmission to UE 120i.

[0091] As indicated by reference numeral 525, UE 120r may determine a channel access type associated with the COT based at least in part on determining that UE 120r is eligible to use the COT. In some aspects, UE 120r may determine the channel access type based at least in part on the COT sharing indication.

[0092] 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, a set of one or more bits, and / or another type of indicator that indicates the channel access type associated with the COT.

[0093] In some aspects, 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., the presence or absence of a flag, a set of one or more bits, and / or a direct indication of another type of the channel access type). For example, UE 120r may determine that the COT is associated with a first channel access type when the COT sharing indication includes a flag, a set of one or more bits, or another type of indicator. UE 120r may determine that the COT is associated with a second channel access type when the COT sharing indication does not include a direct indication of the channel access type associated with the COT.

[0094] In some aspects, the COT sharing indication may include a set of one or more bits, and UE 120r may determine a channel access type associated with the COT based at least in part on the set of bits. In some aspects, UE 120r may determine that the COT is associated with a first channel access type based at least in part on the set of bits being set to a first value (e.g., 0). In some aspects, UE 120r may determine that the COT is associated with a second channel access type based at least in part on the set of bits being set to a second value (e.g., 1).

[0095] In some aspects, the value of the set of bits may indicate an entry in a table. UE 120r may determine a channel access type associated with the COT based at least in part on information included in the entry. For example, UE 120r may determine a table, entry, and / or channel access type associated with the COT in a manner similar to that described above.

[0096] 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 UE 120r may determine the channel access type associated with the COT based at least in part on the additional information.

[0097] In some aspects, the additional information may include information indicating a quantity of UEs 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 quantity of UEs. For example, the UE 120r may determine whether the quantity of UEs associated with the COT meets a threshold (e.g., is greater than a threshold). The UE 120r may determine that the COT is associated with a second channel access type when the quantity of UEs associated with the COT meets the threshold. The UE 120r may determine that the COT is associated with the second channel access type when the quantity of UEs associated with the COT does not meet the threshold.

[0098] In some aspects, the quantity of UEs associated with the COT corresponds to the quantity of UEs indicated in the COT sharing indication. For example, the COT sharing indication may include an identifier associated with a group of UEs that may share the COT. UE 120r may determine a channel access type associated with the COT based at least in part on whether the quantity of UEs included in the group of UEs meets a threshold.

[0099] In some aspects, the quantity of UEs associated with the COT corresponds to the quantity of UEs to which the COT sharing indication is transmitted. For example, the COT sharing indication may indicate a group of UEs to which the COT sharing indication is transmitted (e.g., the COT may include a group of destination addresses for the group of UEs). UE 120r may determine a channel access type associated with the COT based at least in part on whether the quantity of UEs included in the group of UEs to which the COT is transmitted meets a threshold.

[0100] In some aspects, UE 120r may determine the channel access type associated with the COT based at least in part on whether the COT is associated with a resource reservation. For example, UE 120r may determine that the COT is associated with a first channel access type when one or more resources of the COT that can be utilized by UE 120r are associated with a resource reservation (e.g., when another UE transmits sidelink control information reserving one or more resources included in a portion of the COT that can be shared by a group of UEs to which the COT sharing indication is transmitted).

[0101] As indicated by reference numeral 530, UE 120r may determine a transmission start point based at least in part on the channel access type. The transmission start point may correspond to the start of a portion of the COT that may be utilized by UE 120r for sidelink communication.

[0102] For example, as shown in Figure 6, a sidelink slot structure 605 without a physical sidelink feedback channel (PSFCH) may include a total of 14 symbols, with 13 symbols indexed from zero (0) to 12 available for physical sidelink control channel (PSCCH) and / or physical sidelink shared channel (PSSCH) transmissions, and the last symbol in the slot (index 13) left as a gap where no transmission is performed. Further, as shown in Figure 6, the first symbol is used for AGC training, whereby the second symbol (symbol 1) is a repeat of the first symbol (symbol 0) to increase reliability for the PSCCH and / or PSSCH transmissions (e.g., since the receiving UE may not be able to properly receive and / or decode the first symbol prior to performing AGC training). Alternatively, the sidelink slot structure 610 with PSFCH may include a total of 14 symbols, with 10 symbols indexed zero (0) through 9 available for PSCCH and / or PSSCH transmission, two symbols indexed 11 and 12 used for PSFCH symbol repetitions, and two symbols indexed 10 and 13 left as gaps where no transmission is performed. Regardless of whether the sidelink slot structure includes a PSFCH symbol or not, the last symbol in the slot is a gap symbol and the first symbol in the slot is an automatic gain control (AGC) symbol that is a repetition of the second symbol.

[0103] Thus, in some aspects, UE120r may determine a transmission start point, which may represent the start of a possible time at which UE120r can start transmitting during the COT shared by UE120i within a joint period that includes the last symbol (symbol 13) in the current slot (e.g., the slot prior to transmission) and the first symbol (symbol 0) in the next slot (e.g., the slot in which UE120r is to transmit).

[0104] In some aspects, the COT may be associated with a first channel access type (e.g., COT with FDM), and 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. For example, as shown in FIG. 7, the COT (e.g., gap symbol (symbol 13)) may be associated with a common or default transmission starting point (TSP FDM ) UE 120r may identify the common or default transmission start point as the transmission start point based at least in part on the COT being associated with the first channel access type.

[0105] In some aspects, the COT may be configured with multiple common or default transmission start points. Each common or default transmission start point may be associated with a priority. In some aspects, each common or default transmission start point may be associated with the same priority. In some aspects, one or more of the multiple common or default transmission start points may be associated with a priority that is different from the priority associated with another one of the multiple common or default transmission start points.

[0106] In some aspects, the COT sharing indication may indicate a priority associated with the COT, and UE 120r may determine a common or default transmission start point among multiple common or default transmission start points based at least in part on the priority associated with the COT. For example, UE 120r may maintain a mapping of priorities to transmission start points and may utilize the mapping to identify as a transmission start point a common or default transmission start point associated with the same priority as the priority associated with the COT.

[0107] In some aspects, 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 memory of UE 120r.

[0108] In some aspects, UE 120r may determine a common or default transmission start point based at least in part on a priority associated with UE 120r's transmission. For example, UE 120r may maintain a mapping of priorities of transmissions by UE 120r to transmission start points. UE 120r may utilize the mapping to determine a common or default transmission start point associated with the same priority as the priority associated with UE 120r's transmission.

[0109] In some aspects, UE 120r may determine the transmission start point based at least in part on the COT being associated with the first channel access type and at least in part on the COT being associated with a resource reservation. In some aspects, UE 120r may determine that the COT is associated with a resource reservation based at least in part on receiving an SCI transmitted by another UE. The SCI may indicate a resource reservation for resources included in the COT.

[0110] In some aspects, the SCI indicates a transmission start point. For example, the SCI may indicate a start point of resource reservation, and UE 120r may identify the start point of resource reservation as a transmission start point.

[0111] In some aspects, the SCI may include a set of one or more bits, and UE 120r may determine a starting point of 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 of resource reservation, and UE 120r may determine a starting point of resource reservation, and therefore a transmission starting point, based at least in part on the index.

[0112] In some aspects, the set of one or more bits may indicate an entry in the table. 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 start point and / or a start point of resource reservation, and UE 120r may determine the transmission start point based at least in part on the information included in the entry.

[0113] 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, among other examples), and the UE 120r may determine a transmission start point based at least in part on the priority. For example, the UE 120r may maintain a mapping of CAPC values ​​to transmission start points. The UE 120r may utilize the mapping to determine a transmission start point associated with the CAPC value indicated in the SCI.

[0114] In some aspects, UE 120r may determine the transmission start point based at least in part on the amount of subchannels associated with the resource reservation. For example, UE 120r may determine that the transmission start point corresponds to the default transmission start point associated with the COT based at least in part on the amount of allocated subchannels associated with the resource reservation being less than the amount of subchannels included in the resource block set of the COT.

[0115] 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 the end of a transmission of UE 120i.

[0116] In some aspects, the time period X μs may be configured by UE 120i. For example, the COT sharing indication may indicate the time period X μs. Additionally or alternatively, the time period X μs may be configured by a network node (e.g., network node 110).

[0117] In some aspects, the reference transmission may be a response to UE 120i's transmission. For example, UE 120r may determine a common or default transmission starting point based at least in part on the end of the transmission of the response to UE 120i's transmission. In some aspects, UE 120r may select a common or default transmission starting point that occurs a time period (Y μs) after the end of the transmission of the response to UE 120i's transmission.

[0118] In some aspects, the time period Y μs may be configured by UE 120i. For example, the COT sharing indication may indicate the time period Y μs. Additionally or alternatively, the time period Y μs may be configured by a network node (e.g., network node 110).

[0119] 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.

[0120] In some aspects, UE 120r may determine a UE to which UE 120i should transmit a response based at least in part on the sidelink control information transmitted by UE 120i. For example, UE 120r may decode a destination ID field of the sidelink control information transmitted by UE 120i. UE 120r may detect a transmission from the UE to UE 120i indicated by the destination ID field. UE 120r may determine a common or default transmission start point based at least in part on the end of the transmission from the UE to UE 120i indicated by the destination ID field.

[0121] In some aspects, UE 120r may determine a common or default transmission start point based at least in part on an amount of time associated with UE 120r decoding the COT sharing indication. In some aspects, UE 120r may stop decoding the COT sharing indication and / or determining the common or default transmission start point after occurrence of the common or default transmission start point. UE 120r may select another common or default transmission start point from multiple common or default transmission start points associated with the COT based at least in part on UE 120r stopping decoding the COT sharing indication and / or determining a transmission start point after occurrence of the common or default transmission start point.

[0122] In some aspects, the other common or default transmission start point for UE 120r may be the next occurring common or default transmission start point. In some aspects, the other common or default transmission start point may be the next occurring common or default transmission start point associated with a priority that is the same as or lower than the priority associated with the transmission of UE 120r.

[0123] In some aspects, UE 120r may finish decoding the COT sharing indication and / or determining the common or default transmission start point before the occurrence of the common or default transmission start point, but without sufficient time to perform a channel access procedure before the transmission start point. For example, COT may be associated with a channel access procedure that requires the application of a minimum amount of sensing (e.g., for 25 μs). UE 120r may finish decoding the COT sharing indication and / or determining the common or default transmission start point before the occurrence of the common or default transmission start point, but without sufficient time to apply the minimum amount of sensing.

[0124] UE 120r may select another common or default transmission start point from multiple common or default transmission start points associated with the COT that provides UE 120r with a sufficient amount of time to perform the channel access procedure. In some aspects, UE 120r may select the other common or default transmission start point based at least in part on a different mapping (e.g., a mapping of priorities to common or default transmission start points) than the mapping utilized to determine the initial common or default transmission start point.

[0125] In some aspects, the mapping used to determine the other transmission start points may be configured to map priorities to transmission start points that occur at least a minimum amount of time after the end of the reference transmission, which in some aspects may be greater than the amount of time associated with performing a channel access procedure.

[0126] In some aspects, the COT may be associated with a second channel access type (e.g., COT with TDM), and UE 120r may select a transmission start point from a group of transmission start points based at least in part on the COT being associated with the second channel access type. For example, as shown in FIG. 8, the COT (e.g., gap symbol (symbol 13)) may be associated with a group of transmission start points (e.g., TSPTDM1 , TSP TDM2 , TSP TDM3 , TSP TDM4 ) may be configured.

[0127] In some aspects, UE 120r may determine the group of transmission start points configured for the COT based at least in part on the transmission start point configuration. For example, UE 120r may receive (e.g., from network entity 110 and / or UE 120i) and / or store in memory of UE 120r one or more transmission start point configurations associated with the COT.

[0128] In some aspects, UE 120r may select a transmission start point from the group of transmission start points based at least in part on the amount of priority 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 amount of priority associated with the group of transmission start points. UE 120r may determine a priority associated with each transmission start point based at least in part on the amount of priority associated with the group of transmission start points.

[0129] For example, a set of one or more bits may be set to a first value (e.g., 1) to indicate that each transmission start point in a group of transmission start points is associated with the same priority (e.g., the highest priority). As another example, one or more bits may be set to a first half of the transmission start points (e.g., TSP TDM1 and TSP TDM2 ) is associated with the first priority (e.g., the highest priority), and the second half of the transmission start point (e.g., TSP TDM3 and TSP TDM4 ) may be set to a second value (eg, 2) to indicate that the second priority (eg, the next highest priority) is associated with the second priority.

[0130] In some aspects, UE 120r may select a transmission start point based at least in part on the mapping. For example, UE 120r may maintain a mapping of priorities associated with UE 120r's transmissions to transmission start points included in a group of transmission start points. UE 120r may utilize the mapping to determine a transmission start point associated with the same priority as the priority of UE 120r's transmission.

[0131] In some aspects, UE 120r may maintain multiple mappings. UE 120r may determine one mapping of the multiple mappings to be utilized to determine a transmission start point associated with the same priority as the priority of UE 120r's transmission 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 UE 120r's transmission, among other examples.

[0132] In some aspects, UE 120r may receive the mapping (and / or one or more of the 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 memory of UE 120r.

[0133] In some aspects, UE 120r may determine a transmission start 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 start point based at least in part on an end of a transmission of UE 120i in a manner similar to that described above.

[0134] In some aspects, the reference transmission may be a response to the transmission of UE 120i. For example, UE 120r may determine a transmission start point based at least in part on the end of the transmission of the response to the transmission of UE 120i, in a manner similar to that described above.

[0135] In some aspects, UE 120r may determine the transmission start point based at least in part on an amount of time associated with UE 120r decoding the COT sharing indication. In some aspects, UE 120r may stop decoding the COT sharing indication and / or determining the transmission start point after the occurrence of the transmission start point. UE 120r may select another transmission start point from the group of transmission start points based at least in part on UE 120r stopping decoding the COT sharing indication and / or determining the transmission start point after the occurrence of the transmission start point, in a manner similar to that described above.

[0136] In some aspects, the other transmission start point for UE 120r may be a next occurring transmission start point, hi some aspects, the other transmission start point may be a next occurring transmission start point associated with a priority that is the same as or lower than the priority associated with the transmission of UE 120r.

[0137] In some aspects, UE 120r may finish decoding the COT sharing indication and / or determining the transmission start point before the occurrence of the transmission start point, but without sufficient time to perform a channel access procedure before the transmission start point. For example, COT may be associated with a channel access procedure that requires the application of a minimum amount of sensing (e.g., for 25 μs). UE 120r may finish decoding the COT sharing indication and / or determining the transmission start point before the occurrence of the transmission start point, but without sufficient time to apply the minimum amount of sensing.

[0138] UE 120r may select another transmission start point from the group of transmission start points that provides UE 120r with a sufficient amount of time to perform the channel access procedure. In some aspects, UE 120r may select the other transmission start point based at least in part on a different mapping (e.g., a mapping of priority to transmission start points) than the mapping utilized to determine the initial transmission start point.

[0139] In some aspects, the mapping used to determine the other transmission start points may be configured to map priorities to transmission start points that occur at least a minimum amount of time after the end of the reference transmission, which in some aspects may be greater than the amount of time associated with performing a channel access procedure.

[0140] 5, UE 120r may perform a channel access procedure based at least in part on determining the transmission start point. In some aspects, UE 120r may perform a channel access procedure based at least in part on a sensing structure associated with the transmission start point.

[0141] In some aspects, a sensing structure associated with a transmission start point may be determined based at least in part on the amount of time between the end of the reference transmission and the transmission start point. In some aspects, when the amount of time between the transmission start point and the end of 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), the transmission start point may be associated with Type 2C channel access. For example, as shown in FIG. 9, the amount of time between the end of the reference transmission (e.g., the start of symbol 13) and the first transmission start point (TSP1) 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 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 UE 120r's transmission is within the second amount of time.

[0142] In some aspects, when an amount of time between the transmission start point and the end of the reference transmission point is equal to a first amount of time, the transmission start point may be associated with Type 2B channel access. For example, as shown in FIG. 9, the amount of time between the end of the reference transmission and the second transmission start point (TSP2) is 16 μs. UE 120r may determine that the second transmission start point is associated with 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.

[0143] In some aspects, a transmission starting point may be associated with Type 2A channel access when the amount of time between the transmission starting point and the end of the reference transmission point is equal to a third amount of time (e.g., 25 μs). For example, as shown in FIG. 9, the amount of time between the end of the reference transmission and the third transmission starting point (TSP3) 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.

[0144] In some aspects, a subsequent transmission start point (e.g., TSP i ), UE 120r determines the time (t i ) before the time (t i ) is the amount of time (x) between the third transmission point and the end of the reference transmission (e.g., 25 μs). i ) can be added to the amount of time x i may correspond to the amount of time between the third transmission start point and the next transmission start point.

[0145] In some aspects, for subsequent transmission start points, UE 120r may i) is equal to (i-3) × 9 μs, the subsequent transmission start point may be determined to be associated with Type 2A channel access plus i-3 contention slots of 9 μs. As an example, for the fourth transmission start point, i is equal to 4. UE 120r may determine that the amount of time (x i ) (e.g., 9 μs between the third and fourth transmission points) equals (4−3)×9 μs (e.g., 9 μs), it may be determined that the fourth transmission start point is associated with Type 2A channel access plus one (e.g., i−3) contention slots of 9 μs.

[0146] In some aspects, UE 120r may determine a sensing structure associated with a transmission start point based at least in part on whether the transmission start point is an initial transmission start point (e.g., a transmission start point determined with sufficient time to perform a channel access procedure prior to the occurrence of the transmission start point) or a next or later transmission start point (e.g., a transmission start point determined after the occurrence of the initial transmission start point or based at least in part on determining an initial transmission start point with sufficient time to perform a channel access procedure prior to the occurrence of the initial transmission start point).

[0147] In some aspects, UE 120r may determine a 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, UE 120r may determine to use Type 2A channel access prior to the time of the next or later transmission start point. In some aspects, UE 120r may determine to use Type 2A channel access prior to the time (t i ) is (i-1)×x i Based at least in part on the fact that the next or subsequent transmission point (t i ) occurrence time (t i The user may decide to use Type 2A channel access earlier.

[0148] In some aspects, UE 120r may apply sensing prior to the start of a gap symbol based at least in part on the transmission start point being the next or later transmission start point. i When is equal to (i-1) x 9 μs, it may be decided to use Type 2A channel access before the gap symbol plus i-1 contention slots of 9 μs.

[0149] In some aspects, UE 120r may receive a time (t i ) is 25+(i-1)×x i In some aspects, UE 120r may determine to apply sensing starting from the start of the gap symbol based at least in part on the time (t i ) may use Type 2A channel access at any time before x i When is equal to 25+(i-1)*9 μs, Type 2A access plus i-1 contention slots of 9 μs may be used.

[0150] 5, UE 120r may transmit a communication during the COT based at least in part on performing a channel access procedure, as indicated by reference numeral 540. For example, UE 120r may transmit a communication during the COT based at least in part on determining that the COT is available based at least in part on determining that the CCA procedure was successful, as described elsewhere herein.

[0151] As noted above, Figures 5-9 are provided as examples. Other examples may differ from those described with respect to Figures 5-9.

[0152] 10 illustrates an example process 1000 performed by, for example, a first UE, in accordance with the present disclosure. The 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 sidelink in unlicensed spectrum.

[0153] 10, in some aspects, process 1000 may include receiving a COT sharing indication from the second UE (block 1010). For example, the first UE (e.g., using the communications manager 140 and / or the receiving component 1202 shown in FIG. 12) may receive the COT sharing indication from the second UE, as described above.

[0154] As further shown in FIG. 10 , in some aspects, process 1000 may include determining (block 1020) whether the COT is associated with a first channel access type, the first channel access type being associated with aligning sidelink transmissions across a group of UEs, or a second channel access type, the second channel access type being associated with determining a transmission start point for sidelink communication based at least in part on a priority associated with the first UE, based at least in part on a priority associated with the first UE. For example, the first UE (e.g., using the communications manager 140 and / or the determining component 1208 shown in FIG. 12 ) may 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 a group of UEs. In some aspects, the second channel access type is associated with determining a transmission start point for the sidelink communication based at least in part on a priority associated with the first UE.

[0155] As further shown in FIG. 10 , in some aspects, process 1000 may include attempting to transmit a sidelink communication at a transmission start point (block 1030), where the transmission start point corresponds to a common start point utilized by a group of UEs based at least in part on the COT being associated with a first channel access type, or 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 a second channel access type. For example, a first UE (e.g., using the communications manager 140 and / or the transmitting component 1204 illustrated in FIG. 12 ) may attempt to transmit a sidelink communication at the transmission start point, as described above. In some aspects, the transmission start point corresponds to a common start point utilized by a group of UEs based at least in part on the COT being associated with a first channel access type. In some aspects, 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 a second channel access type.

[0156] Process 1000 may include additional aspects, such as any single aspect or any combination of aspects, described below and / or in conjunction with one or more other processes described elsewhere herein.

[0157] In a first 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 an indicator is included in the COT sharing indication.

[0158] 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, where 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.

[0159] In a third aspect, the COT is associated with a first channel access type based at least in part on the indicator being included in the COT sharing indication, or the COT is associated with a second channel access type based at least in part on the indicator not being included in the COT sharing indication.

[0160] In a fourth aspect, 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 a resource allocation associated with the COT.

[0161] 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 quantity of subchannels associated with the resource allocation.

[0162] In a sixth 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 quantity of UEs associated with the COT.

[0163] In a seventh aspect, the COT sharing indication indicates an amount of UEs that can share the COT, and the COT is associated with a second channel access type based at least in part on the amount of UEs being greater than a threshold amount.

[0164] In an eighth aspect, a COT sharing indication is transmitted to a group of UEs, and the COT is associated with a second channel access type based at least in part on an amount of UEs included in the group of UEs being greater than a threshold amount.

[0165] 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 a resource reservation.

[0166] In a tenth aspect, a COT sharing indication is transmitted 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 comprises 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.

[0167] In an eleventh aspect, the process 1000 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.

[0168] In a twelfth aspect, the one or more priorities may comprise a single priority or may comprise multiple priorities, each priority of the multiple priorities being mapped to a different transmission start point.

[0169] In a thirteenth aspect, the first UE fails to decode the COT sharing indication or determines that the channel access procedure cannot be completed before a first transmission start point among the transmission start points mapped to priorities for the sidelink communication, and determining the transmission start point comprises determining the transmission start point based at least in part on the transmission start point being mapped to a priority that is the same priority as or a lower priority relative to a priority associated with the sidelink communication.

[0170] 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.

[0171] In a fifteenth aspect, the mapping is pre-configured in the first UE or the mapping is signaled by a network entity.

[0172] In a sixteenth aspect, the process 1000 includes determining a transmission start point based at least in part on the reference transmission.

[0173] In a seventeenth aspect, the process 1000 includes determining a transmission start point based at least in part on an end of transmission of the COT sharing indication.

[0174] In an eighteenth aspect, the process 1000 includes determining a transmission start point based at least in part on an end of transmission of a response to a communication transmitted by the second UE.

[0175] In a nineteenth aspect, the transmission start point is located in a gap symbol and is achieved via cyclic prefix extension.

[0176] In a twentieth aspect, the transmission start point is located within an AGC symbol and is achieved via AGC symbol puncturing.

[0177] In a twenty-first aspect, the process 1000 includes determining a transmission start point based at least in part on a first priority associated with the sidelink communication and a priority associated with the COT.

[0178] In a 22nd aspect, the first UE determines that a channel access procedure cannot be completed before the transmission start point, and process 1000 includes determining a next transmission start point based at least in part on determining that the channel access procedure cannot be completed before the transmission start point, and attempting to transmit a sidelink communication based at least in part on the next transmission start point.

[0179] In a twenty-third aspect, the transmission start point is determined based at least in part on a first mapping of the transmission start points to priorities associated with the sidelink communication, and the next transmission start point is determined based at least in part on a second mapping of the transmission start points to priorities associated with the sidelink communication.

[0180] In a twenty-fourth aspect, the gap between the reference transmission and the start of the next transmission is equal to or greater than the amount of time associated with performing a channel access procedure.

[0181] In a twenty-fifth aspect, attempting to transmit a sidelink communication comprises performing sensing associated with a channel access procedure prior to or starting from a gap symbol.

[0182] In a twenty-sixth aspect, 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 the reference transmission and a time corresponding to the transmission start point.

[0183] In a twenty-seventh aspect, the COT sharing indication indicates a slot index corresponding to the end of the reference transmission.

[0184] In a 28th aspect, the COT is associated with a resource reservation, 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 the process 1000 includes determining a transmission start point based at least in part on the transmission start point associated with the resource reservation.

[0185] In a twenty-ninth aspect, the process 1000 includes determining a transmission start point associated with the resource reservation based at least in part on one or more of a transmission start point associated with the resource reservation indicated in sidelink control information associated with the resource reservation, a priority associated with the resource reservation, or a default transmission start point associated with the first channel access type.

[0186] In a thirtieth aspect, the first channel access type is associated with a maximum amount of subchannels that may be selected by the first UE for transmission of sidelink communications.

[0187] In a thirty-first aspect, the maximum amount of subchannels is pre-configured 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.

[0188] In a thirty-second aspect, a COT sharing indication and inter-UE coordination signaling are utilized to indicate a preferred set of resources to be used by a first UE.

[0189] 10 illustrates example blocks of process 1000, in some aspects process 1000 may include additional, fewer, different, or differently arranged blocks than those illustrated in FIG 10. Additionally or alternatively, two or more of the blocks of process 1000 may be performed in parallel.

[0190] 11 illustrates an example process 1100 performed by, for example, a first UE, in accordance with the present disclosure. The 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 sidelink in unlicensed spectrum.

[0191] 11, in some aspects, the process 1100 may include acquiring a COT (block 1110). For example, the first UE (e.g., using the communications manager 140 and / or the acquiring component 1308 shown in FIG. 13) may acquire the COT as described above.

[0192] 11, in some aspects, the process 1100 may include transmitting a COT sharing indication to the second group of UEs (block 1120), the COT sharing indication indicating whether the COT is associated with a first channel access type, the first channel access type being associated with aligning sidelink transmissions across the group of UEs, or a second channel access type, the second channel access type being associated with determining a transmission start point for sidelink communication based at least in part on a priority associated with the first UE, to enable the second group of UEs to utilize a portion of the COT. For example, the first UE (e.g., using the communications manager 140 and / or the transmitting component 1304 shown in FIG. 13) may transmit a COT sharing indication to the second group of UEs to enable the second group of UEs 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 a group of UEs, and in some aspects, the second channel access type is associated with determining a transmission start point for the sidelink communication based at least in part on a priority associated with the first UE.

[0193] Process 1100 may include additional aspects, such as any single aspect or any combination of aspects, described below and / or in conjunction with one or more other processes described elsewhere herein.

[0194] 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.

[0195] In a second aspect, the indicator is included in the COT sharing indication, the indicator comprising a set of one or more bits indicating an entry in a table, the entry indicating 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.

[0196] 11 illustrates example blocks of process 1100, in some aspects process 1100 may include additional, fewer, different, or differently arranged blocks than those illustrated in FIG 11. Additionally or alternatively, two or more of the blocks of process 1100 may be performed in parallel.

[0197] 12 is a diagram of an example apparatus 1200 for wireless communication in accordance with the present disclosure. The apparatus 1200 may be a first UE (e.g., UE 120r), or the first UE may include the apparatus 1200. In some aspects, the 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, the apparatus 1200 may communicate with another apparatus 1206 (such as a UE, a base station, or another wireless communication device) using the receiving component 1202 and the transmitting component 1204. As further shown, the apparatus 1200 may include a communications manager 140. The communications manager 140 may include, among other examples, a determining component 1208.

[0198] In some aspects, apparatus 1200 may be configured to perform one or more operations described herein in connection with FIGS. 5-9. Additionally or alternatively, apparatus 1200 may be configured to perform one or more processes described herein, such as process 1000 of FIG. 10. In some aspects, apparatus 1200 and / or one or more components illustrated in FIG. 12 may include one or more components of the first UE described in connection with FIG. 2. Additionally or alternatively, one or more components illustrated in FIG. 12 may be implemented within one or more components described in connection with FIG. 2. Additionally or alternatively, one or more components of the set of components may be implemented at least in part as software stored in memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the function or operation of the component.

[0199] Receiving component 1202 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from device 1206. Receiving component 1202 may provide the received communications to one or more other components of device 1200. In some aspects, receiving component 1202 may perform signal processing (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, among other examples) on the received communications and provide the processed signals to one or more other components of device 1200. In some aspects, receiving component 1202 may include one or more antennas, a modem, a demodulator, a MIMO detector, a receive processor, a controller / processor, a memory, or a combination thereof of a first UE as described with respect to FIG.

[0200] The transmitting component 1204 may transmit communications to the device 1206, such as a reference signal, control information, a data communication, or a combination thereof. In some aspects, one or more other components of the device 1200 may generate communications and provide the generated communications to the transmitting component 1204 for transmission to the device 1206. In some aspects, the transmitting component 1204 may perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples) on the generated communications and transmit the processed signals to the device 1206. In some aspects, the transmitting component 1204 may include one or more antennas, a modem, a modulator, a transmit MIMO processor, a transmit processor, a controller / processor, a memory, or a combination thereof, of the first UE described with respect to FIG. 2. In some aspects, the transmitting component 1204 may be collocated with the receiving component 1202 within a transceiver.

[0201] The receiving component 1202 may receive a COT sharing indication from the second UE. The determining component 1208 may determine, based at least in part on receiving the COT sharing indication, whether the COT is associated with a first channel access type, the first channel access type being associated with aligning sidelink transmissions across a group of UEs, or a second channel access type, the second channel access type being associated with determining a transmission start point for the sidelink communication based at least in part on a priority associated with the first UE. The transmitting component 1204 may attempt to transmit the sidelink communication at a transmission start point that 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 that 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.

[0202] The determining component 1208 may determine the 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.

[0203] The determining component 1208 may determine a transmission starting point based at least in part on the reference transmission.

[0204] The determining component 1208 may determine the transmission start point based at least in part on the end of the transmission of the COT sharing indication.

[0205] The determining component 1208 may determine the transmission start point based at least in part on an end of transmission of a response to the communication transmitted by the second UE.

[0206] The determining component 1208 may determine the transmission start point based at least in part on a first priority associated with the sidelink communication and a priority associated with the COT.

[0207] The determining component 1208 may determine the transmission start point associated with the resource reservation based at least in part on one or more of a transmission start point associated with the resource reservation indicated in the sidelink control information associated with the resource reservation, a priority associated with the resource reservation, or a default transmission start point associated with the first channel access type.

[0208] The number and arrangement of components shown in Figure 12 are provided as an example. In practice, there may be additional, fewer, different, or differently arranged components than those shown in Figure 12. Furthermore, two or more of the components shown in Figure 12 may be implemented within a single component, or a single component shown in Figure 12 may be implemented as multiple distributed components. Additionally or alternatively, a set of components (or components) shown in Figure 12 may perform one or more functions that are described as being performed by another set of components shown in Figure 12.

[0209] 13 is a diagram of an example apparatus 1300 for wireless communication in accordance with the present disclosure. The apparatus 1300 may be a first UE (e.g., UE 120i), or the first UE may include the apparatus 1300. In some aspects, the 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, the apparatus 1300 may communicate with another apparatus 1306 (such as a UE, a base station, or another wireless communication device) using the receiving component 1302 and the transmitting component 1304. As further shown, the apparatus 1300 may include a communications manager 140. The communications manager 140 may include, among other examples, an acquisition component 1308.

[0210] In some aspects, apparatus 1300 may be configured to perform one or more operations described herein in connection with FIGS. 5-9. Additionally or alternatively, apparatus 1300 may be configured to perform one or more processes described herein, such as process 1100 of FIG. 11. In some aspects, apparatus 1300 and / or one or more components illustrated in FIG. 13 may include one or more components of the first UE described in connection with FIG. 2. Additionally or alternatively, one or more components illustrated in FIG. 13 may be implemented within one or more components described in connection with FIG. 2. Additionally or alternatively, one or more components of the set of components may be implemented at least in part as software stored in memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the function or operation of the component.

[0211] The receiving component 1302 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the device 1306. The receiving component 1302 may provide the received communications to one or more other components of the device 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, among other examples) on the received communications and provide the processed signals to one or more other components of the device 1300. In some aspects, the receiving component 1302 may include one or more antennas, a modem, a demodulator, a MIMO detector, a receive processor, a controller / processor, a memory, or a combination thereof of the first UE described with respect to FIG.

[0212] The transmitting component 1304 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the device 1306. In some aspects, one or more other components of the device 1300 may generate communications and provide the generated communications to the transmitting component 1304 for transmission to the device 1306. In some aspects, the transmitting component 1304 may perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples) on the generated communications and transmit the processed signals to the device 1306. In some aspects, the transmitting component 1304 may include one or more antennas, a modem, a modulator, a transmit MIMO processor, a transmit processor, a controller / processor, a memory, or a combination thereof, of the first UE as described with respect to FIG. 2 . In some aspects, the transmitting component 1304 may be collocated with the receiving component 1302 within a transceiver.

[0213] The acquiring component 1308 may acquire the COT. The transmitting component 1304 may transmit a COT sharing indication to the second group of UEs, the COT sharing indication indicating whether the COT is associated with a first channel access type, the first channel access type associated with aligning sidelink transmissions across the group of UEs, or a second channel access type, the second channel access type associated with determining a transmission start point for sidelink communication based at least in part on a priority associated with the first UE, to enable the second group of UEs to utilize a portion of the COT.

[0214] The number and arrangement of components shown in Figure 13 are provided as an example. In practice, there may be additional, fewer, different, or differently arranged components than those shown in Figure 13. Furthermore, two or more of the components shown in Figure 13 may be implemented within a single component, or a single component shown in Figure 13 may be implemented as multiple distributed components. Additionally or alternatively, a set of components (or components) shown in Figure 13 may perform one or more functions that are described as being performed by another set of components shown in Figure 13.

[0215] The following provides a summary of several aspects of the disclosure.

[0216] Aspect 1: A method of wireless communication implemented by an apparatus of a first UE (e.g., UE 120r), comprising: receiving a 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, the first channel access type being associated with aligning sidelink transmissions across a group of UEs, or a second channel access type, the second channel access type being associated with determining a transmission start point for the sidelink communication based at least in part on a priority associated with the first UE; and attempting to transmit sidelink communication at a transmission start point, the transmission start point corresponding 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 the transmission start point 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.

[0217] Aspect 2: The method of aspect 1, 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 an indicator is included in the COT sharing indication.

[0218] Aspect 3: The method of aspect 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, the entry indicating 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.

[0219] Aspect 4: The method of aspect 2, wherein the COT is associated with a first channel access type based at least in part on the indicator being included in the COT sharing indication, or the COT is associated with a second channel access type based at least in part on the indicator not being included in the COT sharing indication.

[0220] Aspect 5: One or more of the methods of aspects 1 to 4, 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 a resource allocation associated with the COT.

[0221] Aspect 6: The method of aspect 5, 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 the amount of subchannels associated with the resource allocation.

[0222] Aspect 7: The method of one or more of aspects 1 to 6, 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 an amount of UEs associated with the COT.

[0223] Aspect 8: One or more of the methods of aspects 1 to 7, wherein the COT sharing indication indicates an amount of UEs that can share the COT, and the COT is associated with a second channel access type based at least in part on the amount of UEs being greater than a threshold amount.

[0224] Aspect 9: The method of one or more of aspects 1 to 8, wherein the COT sharing indication is transmitted to a group of UEs, and the COT is associated with a second channel access type based at least in part on an amount of UEs included in the group of UEs being greater than a threshold amount.

[0225] Aspect 10: One or more of the methods 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 a resource reservation.

[0226] Aspect 11: The method of aspect 10, wherein a COT sharing indication is transmitted 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 comprises 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.

[0227] Aspect 12: The method of one or more of aspects 1 to 11, further including 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.

[0228] Embodiment 13: The method of embodiment 12, wherein the one or more priorities is a single priority.

[0229] Aspect 14: The method of aspect 12, wherein the one or more priorities comprise a plurality of priorities, each priority of the plurality of priorities being mapped to a different transmission start point.

[0230] Aspect 15: The method of aspect 12, wherein the first UE fails to decode the COT sharing indication or determines that the channel access procedure cannot be completed before a first transmission start point among the transmission start points mapped to priorities for the sidelink communication, and determining the transmission start point comprises determining the transmission start point based at least in part on the transmission start point being mapped to a priority that is the same priority as or a lower priority relative to a priority associated with the sidelink communication.

[0231] Aspect 16: The method of 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 wherein 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.

[0232] Example 17: The method of example 12, wherein the mapping is pre-configured in the first UE or the mapping is signaled by a network entity.

[0233] Aspect 18: The method of one or more of aspects 1 to 17, further comprising determining a transmission start point based at least in part on the reference transmission.

[0234] Aspect 19: The method of one or more of aspects 1 to 18, further comprising determining a transmission start point based at least in part on an end of transmission of the COT sharing indication.

[0235] Aspect 20: The method of one or more of aspects 1-19, further comprising determining the transmission start point based at least in part on an end of transmission of a response to the communication transmitted by the second UE.

[0236] Aspect 21: The method of one or more of aspects 1 to 20, wherein the transmission start point is located in a gap symbol and is achieved via cyclic prefix extension.

[0237] Aspect 22: The method of one or more of aspects 1 to 21, wherein the transmission start point is located within an AGC symbol and is achieved via AGC symbol puncturing.

[0238] Aspect 23: The method of one or more of aspects 1 to 22, further including determining a transmission start point based at least in part on a first priority associated with the sidelink communication and a priority associated with the COT.

[0239] Aspect 24: The method of one or more of aspects 1 to 23, wherein the first UE determines that a channel access procedure cannot be completed before the transmission start point, the method further including: determining a next transmission start point based at least in part on determining that the channel access procedure cannot be completed before the transmission start point; and attempting to transmit sidelink communication based at least in part on the next transmission start point.

[0240] Aspect 25: The method of aspect 24, wherein the transmission start point is determined based at least in part on a first mapping of the transmission start point to a priority associated with the sidelink communication, and the next transmission start point is determined based at least in part on a second mapping of the transmission start point to a priority associated with the sidelink communication.

[0241] Aspect 26: The method of aspect 24, wherein a gap between the reference transmission and the start of the next transmission is equal to or greater than an amount of time associated with performing a channel access procedure.

[0242] Aspect 27: The method of aspect 24, wherein attempting to transmit sidelink communication comprises performing sensing associated with a channel access procedure prior to or starting from a gap symbol.

[0243] Aspect 28: The method of one or more of aspects 1 to 27, wherein the transmission start point is associated with the channel access sensing structure based at least in part on an amount of time between an end of the reference transmission and a time corresponding to the transmission start point.

[0244] Aspect 29: The method of aspect 26, wherein the COT sharing indication indicates a slot index corresponding to an end of the reference transmission.

[0245] Aspect 30: One or more of the methods of aspects 1 to 29, wherein the COT is associated with a resource reservation, and 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 the method further includes determining a transmission start point based at least in part on the transmission start point associated with the resource reservation.

[0246] Aspect 31: The method of aspect 30, further comprising determining a transmission start point associated with the resource reservation based at least in part on one or more of a transmission start point associated with the resource reservation indicated in sidelink control information associated with the resource reservation, a priority associated with the resource reservation, or a default transmission start point associated with the first channel access type.

[0247] Aspect 32: One or more of the methods of aspects 1 to 31, wherein the first channel access type is associated with a maximum amount of subchannels that may be selected by the first UE for transmission of sidelink communications.

[0248] Aspect 33: The method of aspect 32, wherein the maximum amount of subchannels is pre-configured 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.

[0249] Aspect 34: The method of aspect 32, wherein the COT sharing indication and inter-UE coordination signaling are utilized to indicate a preferred set of resources to be used by the first UE.

[0250] Aspect 35: A method of wireless communication implemented by an apparatus of a first UE (e.g., UE 120i), comprising: acquiring a COT; and transmitting a COT sharing indication to a group of second UEs to enable the group of second UEs to utilize a portion of the COT, the COT sharing indication indicating whether the COT is associated with a first channel access type, the first channel access type being associated with aligning sidelink transmissions across the group of UEs, or a second channel access type, the second channel access type being associated with determining a transmission start point for sidelink communication based at least in part on a priority associated with the first UE. The method.

[0251] Aspect 36: The method of aspect 35, wherein 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.

[0252] Aspect 37: The method of aspect 36, wherein the indicator is included in the COT sharing indication, and the indicator comprises a set of one or more bits indicating an entry in a table, the entry indicating 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.

[0253] Aspect 38: An apparatus for wireless communication in 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 one or more methods of aspects 1 to 34.

[0254] Aspect 39: A device for wireless communication, comprising: a memory; and one or more processors coupled to the memory, the one or more processors configured to perform one or more of the methods of aspects 1 to 34.

[0255] Aspect 40: An apparatus for wireless communication, comprising at least one means for performing one or more methods of aspects 1 to 34.

[0256] Aspect 41: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to implement one or more of the methods of aspects 1 to 34.

[0257] Aspect 42: 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 device, cause the device to perform one or more methods of aspects 1 to 34.

[0258] Aspect 43: An apparatus for wireless communication in 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 one or more methods of aspects 35 to 37.

[0259] Aspect 44: A device for wireless communication, comprising: a memory; and one or more processors coupled to the memory, the one or more processors configured to perform one or more of the methods of aspects 35 to 37.

[0260] Aspect 45: An apparatus for wireless communication, comprising at least one means for implementing one or more of the methods of aspects 35 to 37.

[0261] Aspect 46: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to implement one or more of the methods of aspects 35 to 37.

[0262] Aspect 47: 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 device, cause the device to perform one or more methods of aspects 35 to 37.

[0263] The above disclosure provides illustration and description, but is not intended to be exhaustive or to limit the embodiments to the precise form disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired from practice of the embodiments.

[0264] As used herein, the term "component" is intended to be broadly construed as hardware and / or combinations of hardware and software. "Software" is intended to be broadly construed to mean, among other examples, instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, and / or functions, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. As used herein, a "processor" is implemented in hardware and / or a combination of hardware and software. It will be apparent that the systems and / or methods described herein can be implemented in various forms of hardware and / or combinations of hardware and software. The actual specialized control hardware or software code used to implement these systems and / or methods is not limiting. Thus, the operation and behavior of the systems and / or methods are described herein without reference to specific software code, with the understanding that those skilled in the art will be able to design software and hardware to implement the systems and / or methods based at least in part on the description herein.

[0265] As used herein, "meeting a threshold" can refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, etc., depending on the context.

[0266] Although particular combinations of features are recited in the claims and / or disclosed herein, those combinations are not intended to limit the disclosure of various aspects. Many of these features can be combined in ways not specifically recited in the claims and / or disclosed herein. The disclosure of various aspects includes each dependent claim in combination with every other claim in the claim set. As used herein, phrases referring to "at least one of" a list of items refer to any combination of those items, including single members. As an example, "at least one of a, b, or c" is intended to encompass a, b, c, a+b, a+c, b+c, and a+b+c, as well as any combination having multiple identical elements (e.g., a+a, a+a+a, a+a+b, a+a+c, a+b+b, a+c+c, b+b, b+b+b, b+b+c, c+c, and c+c+c, or any other permutation of a, b, and c).

[0267] No element, act, or instruction used herein should be construed as essential or required unless expressly described as such. Also, as used herein, the articles "a" and "an" are intended to include one or more items and may be used interchangeably with "one or more." Furthermore, as used herein, the article "the" is intended to include one or more items referred to in connection with the article "the" and may be used interchangeably with "one or more." Furthermore, as used herein, the terms "set" and "group" are intended to include one or more items and may be used interchangeably with "one or more." Where only one item is intended, the phrase "only one" or similar language is used. Also, as used herein, terms such as "has," "have," and "having" are intended to be open-ended terms that do not limit the elements they modify (e.g., an element that "has" A can also have B). Furthermore, the phrase "based on" is intended to mean "based at least in part on," unless expressly stated otherwise. As used herein, the term "or" is also intended to be inclusive when used in a series, and may be used interchangeably with "and / or," except where expressly stated otherwise (e.g., when used in combination with "either" or "only one of").

Claims

1. 1. A method of wireless communication implemented by a first user equipment (UE) device, comprising: receiving a channel occupation 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, the first channel access type being associated with aligning sidelink transmissions across a group of UEs and the second channel access type being associated with determining a transmission start point for sidelink communication based at least in part on a priority associated with the first UE; and attempting to transmit a 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 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. A method comprising:

2. 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; The method of claim 1 , comprising:

3. 3. The method of 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, the entry indicating one or more of the transmission start point, a cyclic prefix extension, an automatic gain control puncturing value, a channel access type, or a sensing duration.

4. the COT is associated with the first channel access type based at least in part on the indicator being included in the COT sharing indication; or The method of claim 2 , wherein the COT is associated with the second channel access type based at least in part on the indicator not being included in the COT sharing indication.

5. 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; The method of claim 1 , comprising:

6. 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 quantity of subchannels associated with the resource allocation; The method of claim 5 , comprising:

7. 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 quantity of UEs associated with the COT; The method of claim 1 , comprising:

8. The COT sharing indication indicates an amount of UEs that can share the COT; the COT is associated with the second channel access type based at least in part on the amount of UEs being greater than a threshold amount; The method of claim 1.

9. the COT sharing indication is sent to the group of UEs; the COT is associated with the second channel access type based at least in part on an amount of UEs included in the group of UEs being greater than a threshold amount; The method of claim 1.

10. 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 a resource reservation; The method of claim 1 , comprising:

11. a COT sharing indication being sent to the first UE and a third UE, and determining whether the COT is associated with the first channel access type or the second channel access type includes: determining that the COT is associated with the first channel access type based at least in part on the COT being associated with the third UE and associated with the resource reservation within the COT; The method of claim 10, comprising:

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

13. The sidelink communication is associated with a first priority, and the method further comprises: determining an amount of consecutive unsuccessful access procedures associated with the sidelink communication; and determining the transmission start point based at least in part on a second priority based at least in part on the amount of consecutive failed access procedures, the second priority being a higher priority than the first priority; The method of claim 12 further comprising:

14. The method of claim 12 , wherein the one or more priorities comprise a plurality of priorities, each priority of the plurality of priorities being mapped to a different transmission start point.

15. The first UE fails to decode the COT sharing indication or determines that a channel access procedure cannot be completed before a first transmission start point among the transmission start points mapped to the priority of the sidelink communication, and determining the transmission start point includes: determining the transmission start point based at least in part on the mapping of the transmission start point to a priority that is the same as or a lower priority than the priority associated with the sidelink communication. The method of claim 12, comprising:

16. 13. The method of 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 wherein 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 of claim 12 , wherein the mapping is pre-configured in the first UE or the mapping is signaled by a network entity.

18. determining the transmission start point based at least in part on a reference transmission; The method of claim 1 further comprising:

19. determining the transmission start point based at least in part on an end of transmission of the COT sharing indication; The method of claim 1 further comprising:

20. determining the transmission start point based at least in part on an end of transmission of a response to a communication transmitted by the second UE; The method of claim 1 further comprising:

21. The method of claim 1 , wherein the transmission start point is located in a gap symbol and is achieved via cyclic prefix extension.

22. 10. The method of claim 1, wherein the transmission start point is located within an automatic gain control (AGC) symbol and is achieved via AGC symbol puncturing.

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

24. The first UE determines that a channel access procedure cannot be completed before the transmission start point, and the method includes: determining a next transmission start point based at least in part on determining that the channel access procedure cannot be completed before the transmission start point; attempting to transmit the sidelink communication based at least in part on the next transmission start point. The method of claim 1 further comprising:

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

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

27. Attempting to transmit the sidelink communication comprises: performing sensing associated with said channel access procedure before or starting from a gap symbol; 25. The method of claim 24, comprising:

28. The method of claim 1 , 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.

29. 30. The method of claim 28, wherein the COT sharing indication indicates a slot index corresponding to the end of the reference transmission.

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

31. the transmission start point associated with the resource reservation, as indicated in sidelink control information associated with the resource reservation; a priority associated with said resource reservation; or a default transmission start point associated with the first channel access type; determining the transmission start point associated with the resource reservation based at least in part on one or more of:

31. The method of claim 30, further comprising:

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

33. 33. The method of claim 32, wherein the maximum amount of subchannels is pre-configured 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. 33. The method of claim 32, wherein the COT sharing indication and inter-UE coordination signaling are utilized to indicate a preferred set of resources to be used by the first UE.

35. 1. A method of wireless communication implemented by a first user equipment (UE) device, comprising: Obtaining a channel occupation time (COT); transmitting a COT sharing indication to a second group of UEs to enable the second group of UEs to utilize a portion of the COT, the COT sharing indication indicating whether the COT is associated with a first channel access type or a second channel access type, the first channel access type being associated with aligning sidelink transmissions across a group of UEs, and the second channel access type being associated with determining a transmission start point for sidelink communication based at least in part on a priority associated with the first UEs; A method comprising:

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

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

38. 1. A first user equipment (UE) apparatus for wireless communication, comprising: Memory and one or more processors coupled to the memory, receiving a channel occupation 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; the first channel access type is associated with aligning sidelink transmissions across a group of UEs; determining, 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; Attempting to transmit a sidelink communication at the transmission start point, 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 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; and one or more processors configured to perform An apparatus comprising:

39. 1. A first user equipment (UE) apparatus for wireless communication, comprising: Memory and one or more processors coupled to the memory, Obtaining a channel occupation time (COT); one or more processors configured to: transmit a COT sharing indication to a second group of UEs to enable the second group of UEs to utilize a portion of the COT, the COT sharing indication indicating whether the COT is associated with a first channel access type or a second channel access type; the first channel access type is associated with aligning sidelink transmissions across a group of UEs; 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.

40. 1. A non-transitory computer-readable storage medium storing a set of instructions for wireless communication, the set of instructions comprising: One or more instructions, when executed by one or more processors of a first user equipment (UE) device, cause the first UE to: receiving a channel occupation 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; the first channel access type is associated with aligning sidelink transmissions across a group of UEs; determining, 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; Attempting to transmit a sidelink communication at the transmission start point, 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 and attempting to transmit the first channel access type to the second channel access type, the first channel access type being associated with the second channel access type.

41. 1. A non-transitory computer-readable storage medium storing a set of instructions for wireless communication, the set of instructions comprising: One or more instructions, when executed by one or more processors of a first user equipment (UE) device, cause the first UE to: Obtaining a channel occupation time (COT); and transmitting a COT sharing indication to a group of second UEs to enable the group of second UEs to utilize a portion of the COT, the COT sharing indication indicating whether the COT is associated with a first channel access type or a second channel access type, the first channel access type being associated with aligning sidelink transmissions across a group of UEs, and the second channel access type being associated with determining a transmission start point for sidelink communication based at least in part on a priority associated with the first UEs.

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

43. 1. A first apparatus for wireless communication, comprising: means for obtaining a channel occupation time (COT); means for transmitting a COT sharing indication to a second group of UEs to enable the second group of devices to utilize a portion of the COT, the COT sharing indication indicating whether the COT is associated with a first channel access type or a second channel access type; the first channel access type is associated with aligning sidelink transmissions across a group of devices; The first device, 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. A default transmission starting point associated with the first channel access type.

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