Channel occupancy time sharing for sidelink communications

Abstract

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a first user equipment (UE) may generate an indication that a second UE can transmit communications during a portion of a channel occupancy time (COT) used by the first UE, the portion being less than the COT in duration. The UE may send the indication to the second UE. Numerous other aspects are described.

Description

[0001] Cross-reference to related applications

[0002] This patent application claims priority to Greek Patent Application No. 20230100333, filed on April 20, 2023, entitled "CHANNEL OCCUPANCY TIME SHARING FOR SIDELINK COMMUNICATIONS". The disclosure of the earlier application is considered part of this patent application and is incorporated herein by reference. Technical Field

[0003] All aspects of this disclosure relate to wireless communication in general, and to techniques and apparatus for sharing channel occupancy time for sidelink communication. Background Technology

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

[0005] A wireless network may include one or more network nodes that support communication for wireless communication devices, such as user equipment (UE) or multiple UEs. A UE may communicate with network nodes via downlink and uplink communication. A "downlink" (or "DL") refers to the communication link from the network node to the UE, and an "uplink" (or "UL") refers to the communication link from the UE to the network node. Some wireless networks may support device-to-device communication, such as via local links (e.g., sidelinks (SL), wireless local area network (WLAN) links, and / or wireless personal area network (WPAN) links, etc.).

[0006] The above multiple access technologies have been adopted in various telecommunication standards to provide common protocols that enable different UEs to communicate on a municipal, national, regional, and / or global level. New Radio (NR), which can be 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 services, making use of new spectrum, and better integrating with other open standards using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink, CP-OFDM and / or single-carrier frequency division multiplexing (SC-FDM) (also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink, and support beamforming, multiple input multiple output (MIMO) antenna technology, and carrier aggregation. As the demand for mobile broadband access continues to increase, further improvements in LTE, NR, and other radio access technologies remain useful. SUMMARY

[0007] Some aspects described herein relate to a method of wireless communication performed by a first user equipment (UE). The method can include generating an indication that a second UE can transmit a communication during a portion of a channel occupancy time (COT) used by the first UE, the portion being less than the COT in duration. The method can include transmitting the indication to the second UE.

[0008] Some aspects described herein relate to a method of wireless communication performed by a second UE. The method can include obtaining information that the second UE can transmit a communication during a portion of a COT used by a first UE, the portion being less than the COT in duration. The method can include transmitting the communication during the portion of the COT.

[0009] Some aspects described herein relate to a method of wireless communication performed by a second UE. The method can include obtaining a first indication of a first COT used by a first UE and shareable with the first UE. The method can include transmitting a sidelink synchronization signal block (S-SSB) or a physical sidelink feedback channel (PSFCH) communication in a portion of the first COT based at least in part on the first indication.

[0010] Some aspects described herein relate to a method of wireless communication performed by a first UE. The method can include transmitting a physical sidelink channel communication in a first portion of a COT used by the first UE. The method can include selectively transmitting a communication in a second portion of the COT for a COT interruption gap duration based at least in part on determining whether the first UE is to use the second portion.

[0011] Some aspects described herein relate to a first UE for wireless communication. The first user equipment can include a memory and one or more processors coupled to the memory. The one or more processors can be configured to generate an indication that a second UE can transmit a communication during a portion of a COT used by the first UE, the portion being less than the COT in duration. The one or more processors can be configured to transmit the indication to the second UE.

[0012] Some aspects described herein relate to a second UE for wireless communication. The second user equipment can include a memory and one or more processors coupled to the memory. The one or more processors can be configured to obtain information that the second UE can transmit a communication during a portion of a COT used by a first UE, the portion being less than the COT in duration. The one or more processors can be configured to transmit the communication during the portion of the COT.

[0013] Some aspects described herein relate to a UE for wireless communication. The UE can include a memory and one or more processors coupled to the memory. The one or more processors can be configured to obtain a first indication of a first COT used by a first UE and shareable with the first UE. The one or more processors can be configured to transmit a S-SSB or PSFCH communication in a portion of the first COT based at least in part on the first indication.

[0014] Some aspects described herein relate to a UE for wireless communication. The UE can include a memory and one or more processors coupled to the memory. The one or more processors can be configured to transmit a physical sidelink channel communication in a first portion of a COT used by a first UE. The one or more processors can be configured to selectively transmit a communication in a second portion of the COT within a COT interruption gap duration based at least in part on determining whether the first UE is to use the second portion.

[0015] Some aspects described herein relate to a non-transitory computer-readable medium storing a set of instructions for wireless communication by a first UE. The set of instructions, when executed by one or more processors of the first UE, can cause the first UE to generate an indication that a second UE can transmit a communication during a portion of a COT used by the first UE, the portion being less than the COT in duration. The set of instructions, when executed by the one or more processors of the first UE, can cause the first UE to transmit the indication to the second UE.

[0016] Some aspects described herein relate to a non-transitory computer-readable medium storing a set of instructions for wireless communication by a second UE. The set of instructions, when executed by one or more processors of the second UE, can cause the second UE to obtain information that the second UE is able to transmit a communication during a portion of a COT used by a first UE, the portion being less than the COT in duration. The set of instructions, when executed by the one or more processors of the second UE, can cause the second UE to transmit the communication during the portion of the COT.

[0017] Some aspects described herein relate to a non-transitory computer-readable medium storing a set of instructions for wireless communication by a second UE. The set of instructions, when executed by one or more processors of the second UE, can cause the second UE to obtain a first indication of a first COT used by a first UE and shareable with the first UE. The set of instructions, when executed by the one or more processors of the second UE, can cause the second UE to transmit a S-SSB or a PSFCH communication in a portion of the first COT based at least in part on the first indication.

[0018] Some aspects described herein relate to a non-transitory computer-readable medium storing a set of instructions for wireless communication by a first UE. The set of instructions, when executed by one or more processors of the first UE, can cause the first UE to transmit a physical sidelink channel communication in a first portion of a COT used by the first UE. The set of instructions, when executed by the one or more processors of the first UE, can cause the first UE to selectively transmit a communication in a second portion of the COT for a COT interruption gap duration based at least in part on determining whether the first UE is to use the second portion.

[0019] Some aspects described herein relate to an apparatus for wireless communication. The apparatus can include means for generating an indication that another apparatus is able to transmit a communication during a portion of a COT used by the apparatus, the portion being less than the COT in duration. The apparatus can include means for transmitting the indication to the other apparatus.

[0020] Some aspects described herein relate to an apparatus for wireless communication. The apparatus can include means for obtaining information that the apparatus is able to transmit a communication during a portion of a COT used by another apparatus, the portion being less than the COT in duration. The apparatus can include means for transmitting the communication during the portion of the COT.

[0021] Some aspects described herein relate to an apparatus for wireless communication. The apparatus can include means for obtaining a first indication of a first COT used by another apparatus and shareable with the apparatus. The apparatus can include means for transmitting, based at least in part on the first indication, an S-SSB or a PSFCH communication in a portion of the first COT.

[0022] Some aspects described herein relate to an apparatus for wireless communication. The apparatus can include means for transmitting a physical sidelink channel communication in a first portion of a COT used by the apparatus. The apparatus can include means for selectively transmitting a communication in a second portion of the COT within a COT interruption gap duration based at least in part on determining whether the apparatus is to use the second portion.

[0023] Aspects generally include a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, network entity, network node, wireless communication device, and / or processing system as substantially described herein with reference to and as illustrated by the accompanying drawings and specification.

[0024] The foregoing has outlined rather broadly the features and technical advantages of examples according to the disclosure in order that the detailed description that follows can be better understood. Additional features and advantages will be described hereinafter. The disclosed concepts and specific examples can be readily utilized as bases for modifying or designing other for carrying the same purposes thereof. Such equivalent constructions are not to depart from the scope of the claims. The characteristics of the concepts disclosed herein, both their organization and method of operation, together with associated advantages will be better understood from the following description when considered in connection with the accompanying drawings. Each of the figures is provided for exemplification and description purposes only and not as a limitation of the definition of the claims.

[0025] While aspects are described in the present disclosure by illustration to some examples, those skilled in the art will understand that such aspects can be implemented in many different arrangements and scenarios. Techniques described herein can be implemented using different platform types, devices, systems, shapes, sizes, and / or packaging arrangements. For example, some aspects can be implemented via integrated chip implementations or other non-module-component based devices (e.g., end-user devices, vehicles, communication 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 described aspects and features can include additional components and features for implementation and practice of claimed and described aspects. For example, transmission and reception of wireless signals can include one or more components for analog and digital purposes (e.g., hardware components including antennas, radio frequency (RF) chains, power amplifiers, modulators, buffers, processors, interleavers, adders, and / or summers). It is intended that aspects described herein can be practiced in a wide variety of devices, components, systems, distributed arrangements, and / or end-user devices of varying sizes, shapes, and constitution. BRIEF DESCRIPTION OF DRAWINGS

[0026] To more fully understand the above-described features of the present disclosure, a further description can be had by reference to the various aspects, some of which are illustrated in the appended drawings. It is noted, however, that the appended drawings are not intended to be exhaustive or limiting of the present disclosure and are not intended to limit the scope of the disclosure to the precise details shown. It is intended that the description serve as a basis for the claims and do not limit the scope of the disclosure.

[0027] Figure 1 is a diagram illustrating an example of a wireless network, in accordance with the present disclosure.

[0028] Figure 2 is a diagram illustrating an example of a network node communicating with user equipment (UE) in a wireless network, in accordance with the present disclosure.

[0029] Figure 3 is a diagram illustrating an example of sidelink communication, in accordance with the present disclosure.

[0030] Figure 4 is a diagram illustrating an example of sidelink communication and access link communication, in accordance with the present disclosure.

[0031] Figure 5 is a diagram illustrating an example of selecting sidelink resources, in accordance with the present disclosure.

[0032] Figure 6is a diagram illustrating an example of sidelink synchronization signal block (S-SSB) transmission in a channel occupancy time (COT) according to the present disclosure.

[0033] Figure 7 is a diagram illustrating an example of transmission during a COT according to the present disclosure.

[0034] Figure 8 is a diagram illustrating an example associated with COT sharing according to the present disclosure.

[0035] Figure 9 and Figure 10 is a diagram illustrating an example of using a COT interruption gap according to the present disclosure.

[0036] Figure 11 is a diagram illustrating an example of responder UE transmission according to the present disclosure.

[0037] Figure 12 is a diagram illustrating an example of transmission during a COT according to the present disclosure.

[0038] Figure 13 is a diagram illustrating an example associated with a responder UE transmitting a communication during another UE’s COT according to the present disclosure.

[0039] Figure 14 is a diagram illustrating an example of using a COT according to the present disclosure.

[0040] Figure 15 is a diagram illustrating an example of using a COT according to the present disclosure.

[0041] Figure 16 is a diagram illustrating an example process performed, for example, by a UE, according to the present disclosure.

[0042] Figure 17 is a diagram illustrating an example process performed, for example, by a UE, according to the present disclosure.

[0043] Figure 18 is a diagram illustrating an example process performed, for example, by a UE, according to the present disclosure.

[0044] Figure 19 is a diagram illustrating an example process performed, for example, by a UE, according to the present disclosure.

[0045] Figure 20 is a diagram of an example apparatus for wireless communication, in accordance with the present disclosure. DETAILED DESCRIPTION

[0046] A first user equipment (UE) (UE1) can use a channel occupancy time (COT), which can be a time duration during which UE1 can transmit on other UEs (e.g., after a successful channel access procedure for unlicensed sidelink communications). UE1 can share the COT with a second UE (UE2). However, UE1 can not want to share the entire COT. Existing rules for COT sharing can prohibit limited sharing of the COT. This can be a problem in terms of the ability of UE2 to transmit high priority communications, such as a sidelink synchronization signal block (S-SSB). S-SSB is expected to not be blocked.

[0047] However, if UE1 is performing a transmission burst in the COT, there are multiple communications in sequence with a gap of 16 μβ or less. UE1 can use a cyclic prefix extension (CPE) to fill the gap to reduce it to 16 μβ. When this is done prior to the S-SSB transmission of UE2, this will block access of UE2, which is expecting to be able to work with a gap of 25 μβ. As such, UE2 can have to wait until the end of the COT used by UE1, which can be 5 milliseconds (ms). This introduces latency.

[0048] According to various aspects described herein, UE2 can be configured to share the COT within a limited portion of the COT (not the entire COT), such as during an S-SSB occasion, even if the COT interruption gap is less than 25 μβ. This can include relaxing the restrictions on COT sharing to allow for transmission of S-SSB if the COT interruption gap is less than 25 μβ (e.g., 16 μβ or less). The latency of the communications of UE2 is reduced since UE2 is allowed to transmit a communication (e.g., S-SSB) during a portion of the COT instead of waiting until after the COT.

[0049] In some aspects, the restrictions on COT sharing can be relaxed to allow for transmission of a physical sidelink feedback channel (PSFCH) communication if the COT interruption gap is less than 25 μβ (e.g., 16 μβ or less). The latency of the communications of UE2 is reduced since UE2 is allowed to transmit a PSFCH communication during a portion of the COT instead of waiting until after the COT.

[0050] Various aspects of the disclosure are described more fully below with reference to the accompanying drawings. This disclosure may, however, 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. One skilled in the art will appreciate that the scope of the disclosure is intended to cover any aspect of the disclosure disclosed herein, whether implemented independently of or combined with any other aspect of the disclosure. For example, an apparatus can be implemented or a method can be practiced using any number of the aspects set forth herein. In addition, the scope of the disclosure is intended to cover such an apparatus or method which is practiced using other structure, functionality, or structure and functionality in addition to or other than the various aspects of the disclosure set forth herein. It will be understood that any aspect of the disclosure disclosed herein can be implemented by one or more elements of a claim.

[0051] Several aspects of telecommunication systems will now be presented with reference to various apparatus and methods. These apparatus and methods will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, or algorithms, among other examples (collectively referred to as “elements”). These elements can be implemented using hardware, software, or combinations thereof. Whether such elements are implemented as hardware or software depends on the particular application and design constraints imposed on the overall system.

[0052] While aspects can be described herein using terminology commonly associated with a 5G or New Radio (NR) radio access technology (RAT), aspects of the present disclosure can be applied to other RATs, such as a 3G RAT, a 4G RAT, and / or a RAT subsequent to 5G (e.g., 6G).

[0053] Figure 1is a diagram illustrating an example of a wireless network 100, in accordance with aspects of the present disclosure. The wireless network 100 can be or 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 can include one or more network nodes 110 (shown as network node 110a, network node 110b, network node 110c, and network node 110d), one 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 illustrated, the network nodes 110 can include one or more network nodes. For example, the network nodes 110 can 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, the network nodes 110 can be a disaggregated network node (sometimes referred to as a disaggregated base station), meaning that the network nodes 110 are configured to utilize a protocol stack that is physically or logically distributed across two or more nodes, such as one or more central units (CUs), one or more distributed units (DUs), or one or more radio units (RUs).

[0054] In some examples, the network nodes 110 are or include network nodes (such as RUs) that communicate with UEs 120 via radio access links. In some examples, the network nodes 110 are or include network nodes (such as DUs) that communicate with other network nodes 110 via a front-haul link or a mid-haul link. In some examples, the network nodes 110 are or include network nodes (such as CUs) that communicate with other network nodes 110 via a mid-haul link or with a core network via a backhaul link. In some examples, the network nodes 110 (such as aggregated network nodes 110 or disaggregated network nodes 110) can include multiple network nodes, such as one or more RUs, one or more CUs, and / or one or more DUs. The network nodes 110 can comprise, for example, an NR base station, an LTE base station, a NodeB, an eNB (e.g., in 4G), a gNB (e.g., in 5G), an access point, a transmission reception point (TRP), a DU, a RU, a CU, a mobility element of a network, a core network node, a network element, network equipment, a RAN node, or a combination thereof. In some examples, the network nodes 110 can interconnect with one another or to one or more other network nodes 110 in the wireless network 100 using any suitable transport network, such as a direct physical connection, an air interface, or a virtual network. The transport network can include one or more wired backhaul links, radio

[0055] In some examples, a network node 110 can provide communication coverage for a particular geographic area. In Third Generation Partnership Project (3GPP), the term "cell" can refer to a coverage area of a network node 110 and / or a network node subsystem serving the coverage area, depending on the context in which the term is used. A network node 110 can be a macro cell, a pico cell, a femto cell, and / or another type of cell. A macro cell can cover a relatively large geographic area (e.g., several kilometers in radius) and can allow unrestricted access by UEs 120 with service subscriptions. A pico cell can cover a relatively small geographic area and can allow unrestricted access by UEs 120 with service subscriptions. A femto cell can cover a relatively small geographic area (e.g., a home) and can allow restricted access by UEs 120 associated with the femto cell, such as UEs 120 in a closed subscriber group (CSG). A network node 110 for a macro cell can be referred to as a macro network node. A network node 110 for a pico cell can be referred to as a pico network node. A network node 110 for a femto cell can be referred to as a femto network node or a home network node. In Figure 1 In the illustrated example, network node 110a can be a macro network node for a macro cell 102a, network node 110b can be a pico network node for a pico cell 102b, and network node 110c can be a femto network node for a femto cell 102c. Network nodes can support one or more (e.g., three) cells. In some examples, cells can not necessarily be stationary, and the geographic area of the cells can move according to the location of a mobile network node 110 (e.g., a mobile network node).

[0056] In some aspects, the term “base station” or “network node” can refer to an aggregated base station, a disaggregated base station, an integrated access and backhaul (IAB) node, a relay node, or one or more components thereof. For example, in some aspects, a “base station” or “network node” can refer to a CU, a DU, a RU, a near real-time (near-RT) RAN intelligent controller (RIC), or a non-RT RIC, or a combination thereof. In some aspects, the term “base station” or “network node” can refer to one device configured to perform one or more functions, such as those described herein in connection with network node 110. In some aspects, the term “base station” or “network node” can refer to multiple devices configured to perform one or more functions. For example, in some distributed systems, each of multiple different devices (which can be located in the same geographic location or different geographic locations) can be configured to perform at least a portion of a function, or to perform at least a portion of the function repeatedly, and the term “base station” or “network node” can refer to any one or more of these different devices. In some aspects, the term “base station” or “network node” can refer to one or more virtual base stations or one or more virtual base station functions. For example, in some aspects, two or more base station functions can be instantiated on a single device. In some aspects, the term “base station” or “network node” can refer to one of a base station function and not another base station function. In this way, a single device can include more than one base station.

[0057] Wireless network 100 can include one or more relay stations. A relay station is a network node that can receive a transmission of data from an upstream node (e.g., a network node 110 or a UE 120) and send a transmission of the data to a downstream node (e.g., a UE 120 or a network node 110). A relay station can be a UE 120 that can relay transmissions for other UEs 120. In Figure 1 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 in order to facilitate communication between network node 110a and UE 120d. A network node 110 that relays

[0058] Wireless network 100 can be a heterogeneous network that includes network nodes 110 of different types, such as macro network nodes, pico network nodes, femto network nodes, relay network nodes, etc. These different types of network nodes 110 can have different transmit power levels, different coverage areas, and different impacts on interference in wireless network 100. For example, macro network nodes can have a high transmit power level (e.g., 5 to 40 watts), whereas pico network nodes, femto network nodes, and relay network nodes can have a lower transmit power level (e.g., 0.1 to 2 watts).

[0059] A network controller 130 can couple to or communicate with a set of network nodes 110 and can provide coordination and control for the network nodes 110. The network controller 130 can communicate with the network nodes 110 via a backhaul communication link or a metro communication link. The network nodes 110 can also communicate with one another directly via wireless backhaul communication links or indirect via wired backhaul communication links. In some aspects, the network controller 130 can be a CU or a core network device, or can include a CU or a core network device.

[0060] The UEs 120 can be dispersed throughout the wireless network 100, and each UE 120 can be stationary or mobile. A UE 120 can include, for example, an access terminal, a terminal, a mobile station, and / or a subscriber unit. A UE 120 can be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device, a biometric device, a wearable device (e.g., a smart watch, smart clothing, smart glasses, a smart wristband, smart jewelry (e.g., a smart ring or a smart bracelet)), an entertainment device (e.g., a music device, a video device, and / or a satellite radio), a vehicular 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 that is configured to communicate via a wireless or wired medium.

[0061] Some UEs 120 can be considered machine-type communication (MTC) or evolved or enhanced machine-type communication (eMTC) UEs. MTC and / or eMTC UEs can include, for example, robots, drones, remote devices, sensors, meters, monitors, and / or location tags, that can communicate with a network node, another device (e.g., remote device), or some other entity. A

[0062] Generally, any number of wireless networks 100 can be deployed in a given geographic area. Each wireless network 100 can support a particular RAT and can operate on one or more frequencies. A RAT can be referred to as a radio technology, an air interface, and / or the like. Frequencies can be referred to as carriers, frequency channels, and / or the like. Each frequency can support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0063] In some examples, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) can communicate directly using one or more sidelink channels (e.g., not using network node 110 as an intermediary to communicate with one another). For example, UE 120 can perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by network node 110. Communication between UEs 120 can be through direct wireless links, using a

[0064] Devices of wireless network 100 can use electromagnetic spectrum for communication. The electromagnetic spectrum can be subdivided based on frequency or wavelength into various classes, bands, channels, and / or the like. For example, devices of wireless network 100 can communicate using one or more operating bands. In 5G NR, two initial operating bands have been 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 greater than 6 GHz, FR1 is often referred to (interchangeably) as a “sub-6 GHz” band in various documents and articles. A similar nomenclature issue sometimes occurs with regard to FR2, which is often referred to (interchangeably) as a “millimeter wave” band in documents and articles, despite the frequencies being lower than the extremely high frequency (EHF) band (30 GHz to 300 GHz) which is designated by the International Telecommunications Union (ITU) as a “millimeter wave” band.

[0065] The 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 frequency range designation FR3 (7.125 GHz to 24.25 GHz). Bands that fall within FR3 can inherit FR1 and / or FR2 characteristics, and thus can effectively extend the features of FR1 and / or FR2 to mid-band frequencies. Moreover, higher bands are currently being explored to extend 5G NR operations beyond 52.6 GHz. For example, three higher operating bands have been identified as frequency range designations FR4-a or FR4-l (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 bands falls within the EHF band.

[0066] With the above examples in mind, unless specifically stated otherwise, it should be understood that the term “sub-6 GHz” or the like, if used herein, can broadly represent frequencies that can be less than 6 GHz, can be within FR1, or can include mid-band frequencies. Furthermore, unless specifically stated otherwise, it should be understood that the term “millimeter wave” or the like, if used herein, can broadly represent frequencies that can include mid-band frequencies, can be within FR2, FR4, FR4-a or FR4-l, and / or FR5, or can be within the EHF band. It is contemplated that the frequencies included within these operating bands (e.g., FR1, FR2, FR3, FR4, FR4-a, FR4-l, and / or FR5) can be modified, and that the techniques described herein are applicable to those modified frequency ranges.

[0067] In some aspects, the first UE (e.g., UE 120) can include a communications manager 140. As described in more detail elsewhere herein, the communications manager 140 can generate an indication that a second UE is able to transmit a communication during a portion of a COT used by the first UE, the portion being less in duration than the COT. The communications manager 140 can transmit the indication to the second UE.

[0068] In some aspects, the communications manager 140 can transmit a physical sidelink channel communication in a first portion of a COT used by the first UE. The communications manager 140 can selectively transmit a communication in a second portion of the COT for a COT interruption gap duration based at least in part on determining whether the first UE is to use the second portion. Additionally, or alternatively, the communications manager 140 can perform one or more other operations described herein.

[0069] In some aspects, a second UE (e.g., UE 120) can include a communication manager 140. As described in more detail elsewhere herein, the communication manager 140 can obtain information that the second UE is able to transmit a communication during a portion of a COT used by a first UE, the portion being less than the COT in duration. The communication manager 140 can transmit the communication during the portion of the COT.

[0070] In some aspects, the communication manager 140 can obtain a first indication of a first COT used by a first UE and shareable with the first UE. The communication manager 140 can transmit an S-SSB or a PSFCH communication in a portion of the first COT based at least in part on the first indication. Additionally, or alternatively, the communication manager 140 can perform one or more other operations described herein.

[0071] As indicated above, Figure 1 are provided as examples. Other examples can differ from what is described with respect to at least one of the Figure 1 described examples.

[0072] Figure 2 is a diagram illustrating an example 200 of a network node 110 communicating with a UE 120 in the wireless network 100, in accordance with the present disclosure. The network node 110 can be equipped with a set of antennas 234a through 234t, such as T antennas (T > 1). The UE 120 can 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 front end components, such as antennas 234 and modem 232. In some examples, the network node 110 can include an interface, communication component, or another component that facilitates communication with the UE 120 or another network node. Some network nodes 110 can not include radio frequency components that facilitate direct communication with UEs 120, such as one or more CUs or one or more DUs.

[0073] At the network node 110, a transmit processor 220 can receive data, from a data source 212, intended for the UE 120 (or a set of UEs 120). The transmit processor 220 can 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 can process (e.g., encode and modulate) the data for the UE 120 based at least in part on the MCSs selected for the UE 120 and can provide data symbols for the UE 120. The transmit processor 220 can process system information (e.g., for semi-static resource partitioning information (SRPI)) and control information (e.g., CQI requests, grants, and / or upper layer signaling) and provide overhead symbols and control symbols. The transmit processor 220 can generate reference symbols for reference signals (e.g., a cell-specific reference signal (CRS) or a demodulation reference signal (DMRS)) and synchronization signals (e.g., a primary synchronization signal (PSS) or a secondary synchronization signal (SSS)). A transmit (TX) multiple-input multiple-output (MIMO) processor 230 can perform spatial processing (e.g., precoding) on the data symbols, the control symbols, the overhead symbols, and / or the reference symbols, if applicable, and can provide a set of output symbol streams (e.g., T output symbol streams) to a corresponding set of modems 232 (e.g., T modems), shown as modems 232a through 232t. Each output symbol stream can be provided to a modulator component (shown as MOD) of a modem 232 using a respective modulator component. Each modem 232 can process a respective output symbol stream (e.g., for OFDM) using a respective modulator component to obtain an output sample stream. Each modem 232 can further process the output sample stream (e.g., convert to analog, amplify, filter, and / or upconvert) using a respective modulator component to obtain a downlink signal. The modems 232a through 232t can transmit a set of downlink signals (e.g., T downlink signals) via a corresponding set of antennas 234 (e.g., T antennas), shown as antennas 234a through 234t.

[0074] At the UE 120, a set of antennas 252 (shown as antennas 252a through 252r) can receive the downlink signals from network nodes 110 and / or other network nodes 110 and can provide a set of received signals (e.g., R received signals) to a set of modems 254 (e.g., R modems) (shown as modems 254a through 254r). For example, each received signal can be provided to a demodulator component (shown as DEMOD) of a modem 254. Each modem 254 can use a respective demodulator component to condition (e.g., filter, amplify, downconvert, and / or digitize) a received signal to obtain input samples. Each modem 254 can use a demodulator component to further process the input samples (e.g., for OFDM) to obtain received symbols. A MIMO detector 256 can obtain received symbols from modems 254, can perform MIMO detection on the received symbols if applicable, and can provide detected symbols. A receive processor 258 can process (e.g., demodulate and decode) the detected symbols, can provide decoded data for the UE 120 to a data sink 260, and can provide decoded control information and system information to a controller / processor 280. The term “controller / processor” can refer to one or more controllers, one or more processors, or combinations thereof. A channel processor can determine reference signal received power (RSRP) parameters, received signal strength indicator (RSSI) parameters, reference signal received quality (RSRQ) parameters, and / or CQI parameters, among other examples. In some examples, one or more components of UE 120 can be included in a housing 284.

[0075] A network controller 130 can include a communication unit 294, a controller / processor 290, and a memory 292. The network controller 130 can include, for example, one or more devices in a core network. The network controller 130 can communicate with the network nodes 110 via the communication unit 294.

[0076] One or more antennas (e.g., antennas 234a through 234t and / or antennas 252a through 252r) can include or be included in 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 can include one or more antenna elements (within a single housing or multiple housings), a set of co-planar antenna elements, a set of non-co-planar antenna elements, and / or one or more antenna elements coupled to one or more transmit and / or receive components (such as, for example, one or more components of a modem 254 and / or a modem 264) in a housing, among other examples. Figure 2 ​

[0077] On the uplink, at UE 120, a transmit processor 264 can receive and process data from a data source 262 and control information (e.g., for reports including RSRP, RSSI, RSRQ, and / or CQI) from controller / processor 280. Transmit processor 264 can generate reference symbols for one or more reference signals. The symbols from transmit processor 264 can be precoded by a TX MIMO processor 266 if applicable, further processed by modems 254 (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to network node 110. In some examples, modems 254 of UE 120 can include modulators and demodulators. In some examples, UE 120 includes a transceiver. The transceiver can include any combination of antenna 252, modems 254, MIMO detector 256, receive processor 258, transmit processor 264, and / or TX MIMO processor 266. The transceiver can be used by a processor (e.g., controller / processor 280) and memory 282 to perform aspects of any of the methods described herein (for example, with reference to Figures 3 to 20 ).

[0078] At network node 110, the uplink signals from UE 120 and / or other UEs can be received by antennas 234, processed by modems 232 (e.g., demodulator components (shown as DEMOD) of modems 232), detected by MIMO detector 236 if applicable, and further processed by receive processor 238 to obtain decoded data and control information transmitted by UE 120. Receive processor 238 can provide the decoded data to data sink 239 and the decoded control information to controller / processor 240. Network node 110 can include communication unit 244 and can communicate with network controller 130 via communication unit 244. Network node 110 can include scheduler 246 to schedule one or more UEs 120 for downlink and / or uplink communications. In some examples, modems 232 of network node 110 can include modulators and demodulators. In some examples, network node 110 includes a transceiver. The transceiver can include any combination of antenna 234, modems 232, MIMO detector 236, receive processor 238, transmit processor 220, and / or TX MIMO processor 230. The transceiver can be used by a processor (e.g., controller / processor 240) and memory 242 to perform aspects of any of the methods described herein (for example, with reference to Figures 3 to 20 ).

[0079] The controller / processor of the network entity (e.g., controller / processor 240 of network node 110), the controller / processor 280 of UE 120, and / or Figure 2 Any other component may perform one or more techniques associated with allowing transmission during a portion of the channel occupancy time, as described in more detail elsewhere herein. For example, the controller / processor 240 of network node 110, the controller / processor 280 of UE 120, and / or Figure 2 Any other component that can execute or direct, for example Figure 16 Process 1600 Figure 17 Process 1700 Figure 18 Process 1800, Figure 19 The operation of process 1900 and / or other processes as described herein. Memory 242 and memory 282 may store data and program code for network node 110 and UE 120, respectively. In some examples, memory 242 and / or memory 282 may include a non-transitory computer-readable medium storing one or more instructions (e.g., code and / or program code) for wireless communication. For example, when executed by one or more processors of network node 110 and / or UE 120 (e.g., directly executed, or executed after compilation, transformation, and / or interpretation), these one or more instructions may cause the one or more processors, UE 120, and / or network node 110 to perform or direct, for example... Figure 16 Process 1600 Figure 17 Process 1700 Figure 18 Process 1800, Figure 19 The operation of process 1900 and / or other processes as described herein. In some examples, execution instructions may include run instructions, transformation instructions, compilation instructions, and / or interpretation instructions, etc.

[0080] In some aspects, the first UE (e.g., UE 120) includes: components for generating an indication that the second UE can transmit communication during a portion of the COT used by the first UE, the portion being shorter in duration than the COT; and / or components for transmitting the indication to the second UE. Components for enabling the first UE to perform the operations described herein may include, for example, one or more of the following: a communication manager 140, an antenna 252, a modem 254, a MIMO detector 256, a receive processor 258, a transmit processor 264, a TXMIMO processor 266, a controller / processor 280, or a memory 282.

[0081] In some aspects, the first UE includes means for transmitting a physical sidelink channel communication in a first portion of a COT used by the first UE; and / or means for selectively transmitting a communication in a second portion of the COT for a COT interrupt gap duration based at least in part on determining whether the first UE is to use the second portion.

[0082] In some aspects, the second UE (e.g., UE 120) includes means for obtaining information that the second UE is able to transmit a communication during a portion of a COT used by a first UE, the portion being less than the COT in duration; and / or means for transmitting the communication during the portion of the COT. The means for the second UE to perform operations described herein can include, for example, one or more of the communication manager 140, antenna 252, modem 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, controller / processor 280, or memory 282.

[0083] In some aspects, the second UE includes means for obtaining a first indication of a first COT used by a first UE and shareable with the first UE; and / or means for transmitting a S-SSB or PSFCH communication in a portion of the first COT based at least in part on the first indication.

[0084] Although Figure 2 The blocks in FIG. 7 are illustrated as distinct components merely for clarity, but the functions described above in relation to these blocks can be implemented in a single hardware, software, or combined component or in various combinations of components. For example, the functions described in relation to transmit processor 264, receive processor 258, and / or TX MIMO processor 266 can be performed by controller / processor 280 or under the control of the controller / processor.

[0085] As indicated above, Figure 2 are provided as examples. Other examples can differ from what is described with respect to the examples Figure 2 described with respect to the examples

[0086] Deployment of communication systems, such as 5G NR systems, can be arranged in various ways with various components or constituent parts. In a 5G NR system or network, a network node, network entity, mobility element of a network, RAN node, core network node, network element, base station, or network equipment can be implemented in an aggregated architecture or a disaggregated architecture. For example, a base station, such as a Node B (NB), an evolved NB (eNB), an NR base station, a 5G NB, an access point (AP), a TRP, or a cell, and so forth, or one or more units (or one or more components) that perform base station functionality can be implemented as an aggregated base station (also referred to as a standalone base station or a monolithic base station) or a disaggregated base station. A “network entity” or “network node” can refer to a disaggregated base station or one or more units of a disaggregated base station, such as one or more CUs, one or more DUs, one or more RUs, or a combination thereof.

[0087] An aggregated base station (e.g., an aggregated network node) can be configured to utilize a radio protocol stack that is physically or logically integrated within a single RAN node (e.g., within a single device or unit). A disaggregated base station (e.g., a disaggregated network node) can be configured to utilize a protocol stack that is physically or logically distributed between two or more units, such as one or more CUs, one or more DUs, or one or more RUs. In some examples, a CU can be implemented within a network node, and one or more DUs can be co-located with the CU or, alternatively, can be geographically or virtually spread across one or more other network nodes. The DUs can be implemented to communicate with one or more RUs. Each of the CUs, DUs, and RUs can also be implemented as virtual units, such as a virtual central unit (VCU), a virtual distributed unit (VDU), or a virtual radio unit (VRU), and so forth.

[0088] Base station type operations or network designs can take into account the aggregated nature of base station functionality. For example, a disaggregated base station can be utilized in an IAB network, an open radio access network (O-RAN (such as a network configuration initiated by the O-RAN Alliance)), or a virtualized radio access network (vRAN, also referred to as a cloud radio access network (C-RAN)) to facilitate scaling of a communication system by separating base station functionality into one or more units that can be deployed individually. A disaggregated base station can include functionality implemented across two or more units at various physical locations, as well as functionality implemented virtually for at least one unit, which can enable flexibility in network design. The various units of a disaggregated base station can be configured for wired or wireless communication with at least one other unit of the disaggregated base station.

[0089] Figure 3 is a diagram illustrating an example 300 of sidelink communication, in accordance with the present disclosure.

[0090] As Figure 3As shown, the first UE 305-1 can communicate with the second UE 305-2 (and one or more other UEs 305) via one or more sidelink channels 310. The UEs 305-1 and 305-2 can communicate using one or more sidelink channels 310 for P2P communications, D2D communications, V2X communications (which can include V2V communications, V2I communications, and / or V2P communications, for example), and / or netwoking. In some aspects, the UEs 305 (e.g., UE 305-1 and / or UE 305-2) can correspond to one or more other UEs described elsewhere herein, such as the UEs 120. In some aspects, the one or more sidelink channels 310 can use a PC5 interface and / or can operate in a high frequency band (e.g., a 5.9 GHz band). Additionally, or alternatively, the UEs 305 can synchronize timing of transmission time intervals (TTIs) (e.g., frames, subframes, slots, or symbols) using global navigation satellite system (GNSS) timing.

[0091] As shown, the first UE 305-1 can communicate with the second UE 305-2 (and one or more other UEs 305) via one or more sidelink channels 310. The UEs 305-1 and 305-2 can communicate using one or more sidelink channels 310 for P2P communications, D2D communications, V2X communications (which can include V2V communications, V2I communications, and / or V2P communications, for example), and / or netwoking. In some aspects, the UEs 305 (e.g., UE 305-1 and / or UE 305-2) can correspond to one or more other UEs described elsewhere herein, such as the UEs 120. In some aspects, the one or more sidelink channels 310 can use a PC5 interface and / or can operate in a high frequency band (e.g., a 5.9 GHz band). Additionally, or alternatively, the UEs 305 can synchronize timing of transmission time intervals (TTIs) (e.g., frames, subframes, slots, or symbols) using global navigation satellite system (GNSS) timing. Figure 3 Further shown, the one or more sidelink channels 310 can include a physical sidelink control channel (PSCCH) 315, a physical sidelink shared channel (PSSCH) 320, and / or a PSFCH 325. The PSCCH 315 can be used to convey control information, similar to a physical downlink control channel (PDCCH) and / or a physical uplink control channel (PUCCH) used for cellular communications with a network node 110 via an access link or access channel. The PSSCH 320 can be used to convey data, similar to a physical downlink shared channel (PDSCH) and / or a physical uplink shared channel (PUSCH) used for cellular communications with a network node 110 via an access link or access channel. For example, the PSCCH 315 can carry sidelink control information (SCI) 330, which can indicate various control information for a sidelink communication, such as one or more resources (e.g., time resources, frequency resources, and / or spatial resources) in which a transport block (TB) 335 can be carried on the PSSCH 320. The TB 335 can include data. The PSFCH 325 can be used to convey 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 a scheduling request (SR).

[0092] Although illustrated on the PSCCH 315, in some aspects, the SCI 330 can include multiple communications in different stages, such as a first stage SCI (SCI-1) and a second stage SCI (SCI-2). The SCI-1 can be transmitted on the PSCCH 315. The SCI-2 can be transmitted on the PSSCH 320. The SCI-1 can 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 a sidelink communication on the PSSCH, a quality of service (QoS) priority value, a resource reservation period, a PSSCH DMRS pattern, an SCI format for the SCI-2, a beta offset for the SCI-2, a number of PSSCH DMRS ports, and / or an MCS. The SCI-2 can include information associated with a data transmission on the PSSCH 320, such as a HARQ process ID, a new data indicator (NDI), a source identifier, a destination identifier, and / or a channel state information (CSI) report trigger.

[0093] In some aspects, the one or more sidelink channels 310 can use a resource pool. For example, a scheduling assignment (e.g., included in the SCI 330) can be transmitted in a subchannel using a particular resource block (RB) across time. In some aspects, a data transmission associated with the scheduling assignment (e.g., on the PSSCH 320) can occupy adjacent RBs in the same subframe as the scheduling assignment (e.g., using frequency division multiplexing). In some aspects, the scheduling assignment and the associated data transmission are not transmitted on adjacent RBs.

[0094] In some aspects, the UE 305 can operate using a sidelink transmission mode (e.g., mode 1), in which resource selection and / or scheduling is performed by a network node 110. For example, the UE 305 can receive a grant (e.g., in downlink control information (DCI) or in a radio resource control (RRC) message, such as for a configured grant) for sidelink channel access and / or scheduling from the network node 110. In some aspects, the UE 305 can operate using a transmission mode (e.g., mode 2), in which resource selection and / or scheduling is performed by the UE 305 (e.g., rather than the network node 110). In some aspects, the UE 305 can perform resource selection and / or scheduling by sensing channel availability for transmission. For example, the UE 305 can measure an RSSI parameter (e.g., a sidelink-RSSI (S-RSSI) parameter) associated with various sidelink channels, can measure an RSRP parameter (e.g., a PSSCH-RSRP parameter) associated with various sidelink channels, and / or can measure an RSRQ parameter (e.g., a PSSCH-RSRQ parameter) associated with various sidelink channels, and can select a channel for transmitting a sidelink communication based at least in part on the measurements.

[0095] Additionally or alternatively, the UE 305 can perform resource selection and / or scheduling using SCI 330 received in the PSCCH 315, which can indicate occupied resources and / or channel parameters. Additionally or alternatively, the UE 305 can perform resource selection and / or scheduling by determining a channel busy ratio (CBR) associated with various sidelink channels, which can be used for rate control (e.g., by indicating a maximum number of resource blocks that the UE 305 can use for a particular set of subframes).

[0096] In a transmitting mode in which resource selection and / or scheduling is performed by the UE 305, the UE 305 can generate a sidelink grant and can transmit the grant in SCI 330. The sidelink grant can indicate, for example, one or more parameters (e.g., transmission parameters) to be used for an upcoming sidelink transmission, such as one or more resource blocks to be used for the upcoming sidelink transmission (e.g., for a TB 335), one or more subframes to be used for the upcoming sidelink transmission, and / or an MCS to be used for the upcoming sidelink transmission. In some aspects, the UE 305 can generate a sidelink grant indicating one or more parameters for semi-persistent scheduling (SPS), such as a periodicity of sidelink transmissions. Additionally or alternatively, the UE 305 can generate a sidelink grant for event-driven scheduling, such as for on-demand sidelink messages.

[0097] A medium access control (MAC) protocol data unit (PDU) subheader can include a source ID (e.g., 16-bit SRC) and a destination ID (e.g., 9-bit DST). The SCI can include a 16-bit destination ID and an 8-bit source ID. If the TB is associated with unicast, the DST field of the decoded MAC PDU subheader is equal to the 8 most significant bits (MSB) of any of the source Layer-2 IDs of the UE, with the 16 least significant bits (LSB) equal to the destination ID in the corresponding SCI, and the SRC field of the decoded MAC PDU subheader is equal to the 16 MSB of any of the destination Layer-2 IDs of the UE, with the 8 LSB equal to the source ID in the corresponding SCI. For unicast, the intended receiving UE checks both the source ID and the destination ID. If the TB is associated with groupcast or broadcast and the DST field of the decoded MAC PDU subheader is equal to the 8 MSB of any of the destination Layer-2 IDs of the UE, with the 16 LSB equal to the destination ID in the corresponding SCI, the intended receiving UE only checks the destination ID.

[0098] As indicated above, Figure 3are provided as examples. Other examples can differ from what is described with regard to Figure 4 the described examples.

[0099] Figure 4 is a diagram illustrating an example 400 of sidelink communications and access link communications according to this disclosure.

[0100] As Figure 3 illustrated, a transmitter (Tx) / receiver (Rx) UE 405 and a Rx / Tx UE 410 can communicate with each other via a sidelink, as described above in connection with Figure 1 FIG. 2. As further illustrated, in some sidelink modes, a network node 110 can communicate with the Tx / Rx UE 405 via a first access link. Additionally or alternatively, in some sidelink modes, the network node 110 can communicate with the Rx / Tx UE 410 via a second access link. The Tx / Rx UE 405 and / or the Rx / Tx UE 410 can correspond to one or more UEs described elsewhere herein, such as the UEs 120 of Figure 4 FIG. 1. Thus, a direct link between UEs 120 (e.g., via a PC5 interface) can be referred to as a sidelink, and a direct link between a network node 110 and a UE 120 (e.g., via a Uu interface) can be referred to as an access link. Sidelink communications can be transmitted via the sidelink, and access link communications can be transmitted via the access link. Access link communications can be downlink communications (from the network node 110 to the UE 120) or uplink communications (from the UE 120 to the network node 110).

[0101] As indicated above, Figure 4 are provided as examples. Other examples can differ from what is described with regard to Figure 5 the described examples.

[0102] Figure 5 is a diagram illustrating an example 500 of selecting sidelink resources according to this disclosure. The example 500 shows a UE 502 (e.g., UE 502) that can receive communications from other UEs, such as UE 504, UE 506, and / or UE 508, on a sidelink channel.

[0103] As described in connection with Figure 5 FIG. 2, the UE 504 is a transmitting UE that transmits communications to the UE 502, which is a receiving UE. The UE 504 can use a report from the UE 502, which can act as a reporting UE that reports available sidelink resources, preferred sidelink resources, non-preferred sidelink resources, or sidelink resource conflicts. The example 500 shows an availability report from the UE 502 to the UE 504 and a communication from the UE 504 to the UE 502.

[0104] If the UE 504 is to transmit a communication to the UE 502, the UE 504 can sense the sidelink channel in a sensing window to determine which sidelink resources (e.g., subcarriers, subchannels) are available. The UE 504 can use a listen-before-talk (LBT) procedure to sense the channel. The LBT procedure can be a Type 1 LBT procedure, where the UE 504 listens for a number of slots (e.g., 9 milliseconds (ms)) and uses a counter. If the sidelink resources are idle or have a signal energy (e.g., RSRP) that satisfies an availability threshold (e.g., the interference or energy measured on the channel is below a maximum decibel-milliwatt (dBm) or dB, RSRP threshold), the sidelink resources can be considered available. The availability threshold can be configured or preconfigured per pair of transmission and reception priorities. The UE 504 can measure the DMRS on the PSCCH or PSSCH, depending on the configuration.

[0105] For example, the UE 504 can prepare to transmit a communication to the UE 502. The UE 504 can have sensed previous sidelink resources and successfully decoded SCI from the UE 506 and the UE 508. The UE 504 can attempt to reserve a sidelink resource, and thus can check the availability of future sidelink resources reserved by the UE 506 and the UE 508 by sensing the sidelink channel in a sensing window. The UE 504 can measure the RSRP of the signal from the UE 508 in sidelink resources 510 and the RSRP of the signal from the UE 506 in sidelink resources 512. If the observed RSRP (RSRP projection) satisfies an RSRP threshold (e.g., below a maximum RSRP), the corresponding sidelink resources can be used for reservation by the UE 504. The UE 504 can reserve a sidelink resource (which can be a random selection from the available resources). For example, the UE 504 can select and reserve sidelink resources 514 for transmission. This can be in a slot after which the UE 506 and the UE 508 have used the sidelink resources, and the UE 504 can have sensed these sidelink resources earlier. The UE 504 can select and reserve a sidelink resource only if a threshold level (e.g., 20%, 30%, or 50% availability) is reached. The UE 504 can increase or decrease the RSRP threshold as needed to reach the threshold level. The UE 504 can select and reserve a sidelink resource in the current slot and up to two (or more) future slots. The reservation can be aperiodic or periodic (e.g., the SCI signal periodicity is between 0 ms and 1000 ms). Periodic resource reservation can be disabled.

[0106] At a processing time T proc,0 after and at another processing time T proc,1Previously, there can be a resource selection trigger to trigger selection of sidelink resources, followed by a resource selection window from which sidelink resources can be obtained. The resource selection window can be a time window from which sidelink resources can be selected, and the resource selection window can be extended for a remaining packet delay budget (PDB).

[0107] If the UE 504 determines that the channel is clear, the UE 504 can consider the channel to be clear for a maximum duration or for a COT. If the UE 504 does not need to use the entire COT for transmission or reception, the UE 504 can share the COT with another UE, such as with the UE 502. The UE 504 can indicate the RBs and duration of the COT. The UE 504 can be a COT initiator that performs an LBT procedure and starts the COT. The UE 504 can transmit data to the UE 502 in a PUSCH communication during the COT. The UE 502 can be a COT responder and can provide a PSFCH communication to the UE 504 in response to the PUSCH communication during the COT. The UE 502 can be considered a PSFCH transmitter. The UE 502 can perform a Type 2 LBT procedure, which is a “one-shot” channel sensing with a much shorter duration than a Type 1 LBT procedure (e.g., 16 microseconds).

[0108] If the UE 502 wants to use PSFCH symbols as part of a shared COT (e.g., RBs), at least one PSFCH is expected to target the COT initiator. Currently, the physical (PHY) layer has all information of the COT-related information (e.g., RB set, duration, channel access priority class), but has a limited range of IDs of the COT initiator, only knowing 8 bits in the source ID SCI-2 field corresponding to 8 LSBs of a 24-bit L2 ID associated with a sidelink session. Type 2 access based on Layer 1 (L1) ID only is less reliable. Currently, the MAC layer has the full Layer 2 (L2) logical ID related to a sidelink session and can reliably map a transmission to a (logical) destination. On the other hand, the MAC layer is typically not aware of L1 information related to a COT (e.g., for 3GPP standard Release 16 Unlicensed NR (NR-U)). Such information can include COT sharing information (COT-SI) indicating RBs and time domain of a COT. In summary, while in NR-U the relationship of COT sharing can be trivial (gNB-UE), in unlicensed sidelink (SL-U), COT sharing and channel access type can depend on the ID. Thus, the separation of necessary information in the MAC layer (full L2 ID) and the PHY layer (COT information), respectively, can be an obstacle.

[0109] Another issue is related to how to handle the ID information of PSFCH. The ID in MAC / PHY layer is a logical ID (per session) and is not mapped to a specific device. This complicates the use of shared COT across different transmissions. The PHY / MAC layer cannot learn whether COT sharing is applicable for PSFCH by decoding COT-SI from other links or sessions.

[0110] In one example, a solution is to determine whether a TB on PSSCH is eligible to be transmitted on a shared COT based on a logical ID contained in the initiator’s transmission or a COT sharing ID (mapped to several logical IDs) contained in COT-SI. A COT responder can determine whether the COT responder is the target of the COT-SI by reading the known logical ID or COT sharing ID. If the COT responder ID matches one of the logical IDs found in the COT initiator’s transmission or logical IDs mapped to the COT sharing ID found in the COT initiator’s transmission, the COT responder can determine whether a new TB can be transmitted. The COT sharing ID or logical ID can enable more targets, enabling unicast or groupcast, or enabling COT sharing across sessions.

[0111] For PSFCH, the COT responder can use the logical ID in COT-SI, but can need the PSFCH ID in order to determine the eligibility of the PSFCH transmission to use a shared COT. This is a PHY layer transmission and the decision to use COT is made by the PHY layer (e.g., based on mapping of resources and L1 source ID in received SCI-2). Differently, for PSSCH, the MAC entity provides information to the PHY layer to populate the SCI, but for the case of MAC to PHY communication, this information is not used for PSFCH transmission.

[0112] There are at least three options for COT sharing eligibility. In a first option (Option 1), the PSFCH transmitter is addressed by the COT initiator (receives PSSCH or PSSCH schedules SCI for PSFCH) and the PSFCH transmission burst contains at least one code division multiplexing (CDM) or frequency division multiplexing (FDM) PSFCH targeting the COT initiator. In a second option (Option 2), the PSFCH transmitter is addressed by the COT initiator and the PSFCH transmission can target any UE. In a third option (Option 3), the PSFCH transmitter is not addressed by the COT initiator but receives COT-SI and the PSFCH transmission can target any UE. However, for the above described solutions and options, the COT responder (e.g., PSFCH transmitter) can desire additional clarity on whether the COT responder is eligible to share the COT.

[0113] In some aspects, the UE can transmit a CPE that includes a start of transmission in a gap between the first communication and the second communication. The UE can transmit the CPE so as to start transmitting at a starting location that is before a first symbol of the second communication that is scheduled. There can be one or more CPE starting locations (e.g., 16 μβ, 25 μβ, 34 μβ, 70 μβ) before the starting location of an S-SSB, a PSFCH communication, or another physical sidelink channel communication (e.g., PSCCH, PSSCH). The CPE starting locations can be configured or indicated.

[0114] When performing S-SSB transmission, a responding UE can utilize a COT shared by a COT initiating UE (using Type 1 channel access) when the responding UE intends to transmit an S-SSB within a set of RBs corresponding to the shared COT. When performing PSFCH transmission, a responding UE can utilize a COT shared by a COT initiating UE at least when at least one of the PSFCH transmissions within the symbols / slots of the responding UE is specifically targeted to the COT initiating UE within a set of RBs corresponding to the shared COT.

[0115] For the following two options, CPE can be transmitted from a CPE starting location before a sidelink transmission: within a symbol that is just before the next automatic gain control (AGC) symbol; within a symbol that is just before the next AGC symbol for 15 kilohertz (kHz) subcarrier spacing (SCS); or within at most 2 symbols that are just before the next AGC symbol for 30 or 60 kHz SCS.

[0116] A responding UE on a shared COT can be a receiver UE that is a target of a PSCCH / PSSCH transmission by a COT initiator. In the case of unicast from the COT initiator, the receiving UE can use the same COT when the source identifier (ID) and destination identifier contained in the COT initiator’s SCI match the corresponding destination ID and source ID related to the same unicast at the receiving UE. In the case of groupcast and broadcast, the receiving UE can use the same COT when the destination ID contained in the COT initiator’s SCI matches the destination ID known at the receiving UE. If additional IDs (in addition to the source ID and destination ID of the PSCCH / PSSCH transmission) are supported in the COT-SI and when the additional IDs are included in the COT-SI from the COT initiator, the responding UE can be a UE identified by the IDs.

[0117] As indicated above, Figure 5 are provided as examples. Other examples can differ from what is described Figure 6 with respect to the examples described.

[0118] Figure 6is a diagram illustrating an example 600 of S-SSB transmission in a COT according to the present disclosure.

[0119] A first UE (UE1) can use a COT. UE1 can share the COT with a second UE (UE2). However, UE1 can not want to share the entire COT. Existing rules for COT sharing can prohibit limited sharing of the COT. This can be an issue in terms of the capability of UE2 to transmit S-SSB. S-SSB can be a high priority transmission that provides timing synchronization reference to other UEs. It is desirable that S-SSB not be blocked and that type 2A channel access with a duty cycle limit be introduced to help limit S-SSB blocking. A CPE location can be indicated for S-SSB to minimize inter-UE blocking. However, it is expected that the COT interruption gap duration between communications will be 25 microseconds (ps). If UE1 starts transmitting within the COT interruption gap, UE1 maintains the COT and UE2 is not able to transmit. If UE1 does not start transmitting within the COT interruption gap, UE1 does not maintain the COT and UE2 can transmit. UE2 can perform type 2A channel access before transmitting.

[0120] However, if UE1 is performing a transmission burst in the COT, there are multiple communications in sequence with a gap of 16 ps or less. UE1 can use CPE to fill the gap to reduce it to 16 ps. When this is done prior to the S-SSB transmission of UE2, this will block UE2’s access in type 2A with a duty cycle limit (e.g., LBT and 25 ps measurement structure). That is, as shown in example 600, if the initiating UE1 transmits PSCCH / PSSCH in the COT and then transmits S-SSB in a transmission burst with a 16 ps COT interruption gap duration, UE2 will be blocked from performing successful type 2A channel access. UE2 will not be able to transmit S-SSB in the same S-SSB occasion as UE1. Thus, UE2 can have to wait until the end of the COT used by UE1, which can be 5 ms. This introduces latency.

[0121] According to various aspects described herein, UE2 can be configured to share the COT within a limited portion of the COT (not the entire COT), such as during an S-SSB occasion, even if the COT interruption gap is less than 25 ps, such as 16 ps. This can include relaxing the restrictions on COT sharing to allow for transmission of S-SSB if the COT interruption gap is less than 25 ps (e.g., 16 ps or less).

[0122] In some aspects, UE1 can generate an indication that UE2 can transmit a communication during a portion of a COT used by UE1, the portion being less in duration than the COT. UE1 can transmit the indication to UE2. UE2 can obtain the indication (e.g., receive the indication, obtain the information from stored configuration information or an earlier configuration) and transmit a communication during the portion of the COT. By providing UE2 with an opportunity to transmit a communication during the portion of the COT (rather than after the COT), UE1 reduces latency of the communication of UE2. UE1 is also not limited to transmitting a data burst with a 16 μβ gap, which can allow UE1 and UE2 to use multiple CPE start locations.

[0123] In some aspects, the communication can be an S-SSB, a PSFCH communication, or another high priority communication. By allowing UE2 to transmit an S-SSB, a PSFCH communication, or another high priority communication, UE1 reduces latency of other aspects of the communication of UE2.

[0124] As indicated above, Figure 6 are provided as examples. Other examples can differ from what is described Figure 7 with respect to the examples described with respect to

[0125] Figure 7 is a diagram of an example 700 of transmissions during a COT, in accordance with the present disclosure.

[0126] A PSFCH communication can be a high priority transmission in SL-U as part of a HARQ process that provides feedback to other UEs for a PSSCH communication. It is expected that the transmission of a PSFCH communication will not be blocked. In order to provide feedback to other UEs, a PSSCH transmission can be associated with a HARQ process. It is intended that a PSFCH communication should be allowed to be FDMed or CDMed as much as possible. Also, for PSFCH, one CPE location can be supported to minimize inter-UE blocking (UE2 performs LBT when UE2 has transmitted a CPE). It is expected that if one CPE location is after a gap of 25 μβ, then inter-UE blocking between a Type 1 PSFCH access and a Type 2A PSFCH access in a shared COT can be better avoided (at least for those shared UE accesses after a gap > 15 μβ).

[0127] It is desirable that when UE1 performs a transmission, a gap is filled using a CPE to reduce it to 16 μβ. However, if UE1 does not share a COT, then other UEs (e.g., UE2) will not have an opportunity to transmit their PSFCH communication, as shown in example 700. Not being able to transmit during the COT of another UE increases latency.

[0128] In some aspects, if UE2 is allowed to share the COT within the PSFCH timing (with a 16μs CPE, allowing the UE1 initiator to maintain multiple consecutive time slot transmissions (MCSt)), UE2 may have a way to concurrently perform its high-priority PSFCH transmissions with UE1. This could include relaxing the restrictions on COT sharing to allow PSFCH communication transmission if the COT interruption gap is less than 25μs (e.g., 16μs or less). In some scenarios, the S-SSB or PSFCH may require two CPE positions 702 to allow for the 16μs and 25μs gaps in symbol #13.

[0129] As indicated above, Figure 7 This is provided as an example. Other examples are available with reference to [the relevant information]. Figure 8 The examples described are different.

[0130] Figure 8 This is a diagram illustrating an example 800 associated with COT sharing according to this disclosure. For example... Figure 8 As shown, the first UE810 (e.g., UE 120) and the second UE820 (e.g., UE 120) can communicate with each other via a side link. UE810 can be a COT initiator, and UE820 can be a COT responder or a PSFCH sender.

[0131] As shown by reference numeral 825, UE 810 may generate an indication for transmitting communication during a portion of the COT used by the first UE. This portion may be shorter than the entire COT in duration. As shown by reference numeral 830, UE 810 may transmit this indication. UE 820 may receive this indication. In some aspects, this indication may be shared by a specific COT (the shared resources are only the S-SSB slots and PSFCH symbols), wherein the transmission by UE 820 may be concurrent with the transmission by UE 810. In some aspects, as shown by reference numeral 835, UE 820 may alternatively obtain information from configuration information regarding the transmission of communication during this portion of the COT. As shown by reference numeral 840, UE 820 may transmit communication during this portion of the COT. This communication may be S-SSB, PSFCH communication, or another high-priority communication.

[0132] As indicated above, Figure 8 This is provided as an example. Other examples are available with reference to [the relevant information]. Figure 9 The examples described are different.

[0133] Figure 10 and Figure 10are diagrams of examples 900, 902, and 1000 that illustrate use of COT interruption gaps 904 and 906 according to the present disclosure. In example 900, UE1 does not perform LBT in COT interruption gap 904. UE2 performs Type 2A LBT in COT interruption gap 904. The CPE in COT interruption gap 904 in example 900 is earlier than the CPE in example 902. In example 1000, the CPE is smaller. Figure 11

[0134] Figure 11 is a diagram of example 1100 that illustrates responding UE transmissions according to the present disclosure.

[0135] Even if the COT is shared by UE1 (e.g., to UE3), the current rules for responding UEs can opt-in (e.g., block, limit, or deprioritize) transmission of S-SSB from UE2 if UE2 is not a target of the COT-SI, which can introduce latency in cases where UE2 must wait until after the COT to transmit. Example 1100 shows possible transmissions from UE1, UE2, and UE3. The S-SSB of UE2 is marked as blocked. In some aspects, the definition of “responding UE” can be relaxed when the target is S-SSB transmission. That is, UE2 can not be a COT target (responding UE) of UE1, but UE2 can transmit in a portion of the COT as if UE2 is a responding UE. The ID match check for UE2 can be skipped. In this way, latency is reduced.

[0136] As indicated above, Figure 11 is provided as an example. Other examples can differ from what is described with respect to Figure 12 described with respect to examples.

[0137] Figure 12 is a diagram of example 1200 that illustrates transmissions during a COT according to the present disclosure.

[0138] Even if the COT is shared by UE1 (e.g., to UE3), the current rules for responding UEs can opt-in transmission of PSFCH from UE2 if UE2 is not a target of the COT-SI, which is undesirable. In some aspects, the definition of “responding UE” can be relaxed when the target is PSFCH transmission. In this way, latency is reduced.

[0139] As indicated above, Figure 12 is provided as an example. Other examples can differ from what is described with respect to Figure 13 described with respect to examples.

[0140] Figure 13 ​is a diagram illustrating example 1300 associated with an example of a responder UE transmitting a communication during a COT of another UE in accordance with the present disclosure.

[0141] In some aspects, UE1 can transmit a COT-SI and UE2 can be a responder UE that can transmit a particular communication (such as an S-SSB or PSFCH communication) during a portion of a COT. By being able to transmit an S-SSB or PSFCH communication during the portion of the COT of UE1, UE2 can reduce latency in the communication.

[0142] As shown by reference number 1305, UE 810 can transmit a COT-SI. The COT-SI can indicate a first indication of a first COT used by UE 810 and can be shared with UE 820. In some aspects, UE1 can explicitly indicate that UE2 can be a responder UE that is allowed to transmit an S-SSB or PSFCH communication during the portion of the COT.

[0143] Some COT rules can require an initiator UE to target a responder UE to transmit during a shared COT. This can include determining whether an ID of a receiving UE matches (e.g., is equal to or otherwise sufficiently similar to) a target ID in a COT-SI or indication. In some aspects, UE 810 can explicitly indicate that UE 820 can be a responder UE that is allowed to transmit an S-SSB or PSFCH communication during the portion of the COT, regardless of or independent of whether an ID of UE 820 matches a target ID from UE 810. In some aspects, a UE can use a relaxed definition of a responder for a UE that intends to transmit an S-SSB and / or PSFCH transmission (skip ID match check). UE 820 can transmit in the portion of the COT based at least in part on a rule specified for the behavior, an indicator (e.g., one bit) in SCI to control the behavior, or an RRC configuration to control the behavior. As shown by reference number 1310, UE 820 can transmit an S-SSB or PSFCH communication during the portion of the COT.

[0144] As indicated above, Figure 13 is provided as an example. Other examples can differ from what is described Figure 14 with respect to the examples described.

[0145] Figure 14 is a diagram illustrating example 1400 of using a COT in accordance with the present disclosure.

[0146] In some aspects, the UE (UE1) can ensure contiguous TX over the burst by using rate matching of PSSCH in symbol #13 without terminating COT. In some aspects, a unique CPE location can be set to zero length (at the slot boundary) for S-SSB slots. UEs attempting Type 2A access with duty cycle limit will not block each other as the measurement has the entire gap symbol.

[0147] In some aspects, if the initiating UE (UE1) wants to perform MCSt including S-SSB slots, UE1 can pre-empt the slots by fully filling the gap symbol 1402 (with rate matching 1404) and thus will block other UEs that want to transmit S-SSB. Otherwise, UE1 can terminate COT. This behavior can be up to each UE (implementation) and can be allowed based at least in part on specified information in stored configuration information or based at least in part on RRC configuration.

[0148] As indicated above, Figure 14 is provided as an example. Other examples can differ from what is described with Figure 15 respect to the examples described in this section.

[0149] Figure 15 is a diagram of an example 1500 of using COT according to the present disclosure.

[0150] As shown by reference number 1505, the UE 810 can transmit a physical sidelink channel communication in a first portion of a COT used by a first UE. The communication can be a PSCCH communication and / or a PSSCH communication. The UE 810 can determine whether to use a remaining portion (second portion) of the COT. As shown by reference number 1510, the UE 810 can selectively transmit a communication in the second portion of the COT for a COT interruption gap duration based at least in part on determining whether the UE 810 is to use the second portion of the COT. In some aspects, the UE 810 can transmit the communication for the COT interruption gap duration based at least in part on determining to use the second portion of the COT. Alternatively, in some aspects, the UE 810 can refrain from transmitting the communication for the COT interruption gap duration based at least in part on determining not to use the second portion of the COT.

[0151] By selectively transmitting the communication based on determining to use the COT, the UE 810 can have the ability to keep the COT or share the COT, depending on how the UE 810 is configured to protect or share. This control can be used to reduce latency and save signaling resources.

[0152] As indicated above, Figure 15 is provided as an example. Other examples can differ from what is described with Figure 16 respect to the examples described in this section.

[0153] In some aspects, the new COT sharing definition can focus only on shared resources in S-SSB and / or PSFCH occasions, where the initiator UE can indicate in SCI that S-SSB slots and PSFCH symbols in its COT can be shared, regardless of whether the COT is formally shared (e.g., for PSCCH / PSSCH TX) and potentially without ID match check. In some aspects, a rule can be specified instead of SCI indication. In some aspects, RRC configuration can configure the UE instead of SCI indication.

[0154] In some aspects, the indication, rule, and / or configuration can be for both S-SSB and PSFCH, for S-SSB only, or for PSFCH only (single or two separate indications, rules, and / or configurations).

[0155] In some aspects, the indication can be for the next opportunity from the indication transmission (implicitly stating to fall within the maximum COT (MCOT) duration) or for the entire COT (COT duration indication is needed) (for time-limited sharing or for the entire COT).

[0156] In some aspects, each indication can have different values, and one or more of the following indications can be supported: no transmission allowed, transmission allowed with ID check, or transmission allowed without ID check.

[0157] In some aspects, the default CPE used by the responder UE can be for gap = 16 μβ. The COT initiator UE can leave a 16 μβ gap via CPE padding before each S-SSB and PSFCH communication occasion. The responder UE can perform Type 2C or Type 2B channel access in the gap (Type 2C is intended to be used for single transmission, Type 2B can be used if there is a longer S-SSB burst, e.g., over 1 ms). If multiple CPE locations are preconfigured (e.g., for PSFCH and / or S-SSB), the first location of the 16 μβ gap can be considered as the default location for this special COT sharing.

[0158] Figure 16 FIG. 16 is a diagram illustrating an example process 1600 performed, for example, by a first UE, in accordance with the present disclosure. Example process 1600 is an example where the first UE (e.g., UE 120, UE 810) performs operations associated with COT sharing for sidelink communications.

[0159] As Figure 20As shown, in some aspects, the process 1600 can include generating an indication that a second UE is able to transmit a communication during a portion of a COT used by a first UE, the portion being less in duration than the COT (block 1610). For example, the first UE (e.g., using Figure 16 The depicted communication manager 2006 can generate an indication that a second UE is able to transmit a communication during a portion of a COT used by a first UE, the portion being less in duration than the COT, as described above.

[0160] As Figure 20 Further as shown, in some aspects, the process 1600 can include transmitting the indication to the second UE (block 1620). For example, the first UE (e.g., using Figure 16 The depicted transmitting component 2004 and / or communication manager 2006 can transmit the indication to the second UE, as described above.

[0161] The process 1600 can include additional aspects, such as any single aspect or any combination of aspects described below and / or in connection with one or more other processes described elsewhere herein.

[0162] In a first aspect, the communication is an S-SSB and does not include a PSFCH communication.

[0163] In a second aspect, alone or in combination with the first aspect, the communication is a PSFCH communication and does not include a sidelink synchronization signal block.

[0164] In a third aspect, alone or in combination with one or more of the first and second aspects, the communication is an S-SSB or a PSFCH communication.

[0165] In a fourth aspect, alone or in combination with one or more of the first through third aspects, the first UE is a COT initiator.

[0166] Although Figure 16 Example blocks of the process 1600 are illustrated, but in some aspects, the process 1600 can include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted. Additionally, or alternatively, two or more blocks of the process 1600 can be performed concurrently. Figure 17 The depicted blocks of the process 1600 can be performed by a UE (e.g., by a processor of the UE, such as the communications manager 2006 of the UE 1200).

[0167] Figure 17 is a diagram illustrating an example process 1700 performed, for example, by a second UE, in accordance with the present disclosure. Example process 1700 is an example where the second UE (e.g., UE 120, UE 820) performs operations associated with COT sharing for sidelink communications.

[0168] As Figure 20As shown, in some aspects, process 1700 can include obtaining information that a second UE is capable of transmitting a communication during a portion of a COT used by a first UE, the portion being less than the COT in duration (block 1710). For example, the second UE (e.g., using reception component 2002 and / or communication manager 2006, depicted) can obtain information that a second UE is capable of transmitting a communication during a portion of a COT used by a first UE, the portion being less than the COT in duration, as described above. Figure 17 The reception component 2002 and / or communication manager 2006, as

[0169] As further shown, in some aspects, process 1700 can include transmitting the communication during the portion of the COT (block 1720). For example, the second UE (e.g., using transmission component 2004 and / or communication manager 2006, depicted) can transmit the communication during the portion of the COT, as described above. Figure 20 The reception component 2002 and / or communication manager 2006, as Figure 17 The transmission component 2004 and / or communication manager 2006, as

[0170] Process 1700 can include additional aspects, such as any single aspect or any combination of aspects described below and / or in connection with one or more other processes described elsewhere herein.

[0171] In a first aspect, the communication is an S-SSB and does not include a PSFCH communication.

[0172] In a second aspect, alone or in combination with the first aspect, the communication is a PSFCH communication and does not include a sidelink synchronization signal block.

[0173] In a third aspect, alone or in combination with one or more of the first and second aspects, the communication is an S-SSB or a PSFCH communication.

[0174] In a fourth aspect, alone or in combination with one or more of the first through third aspects, obtaining the information includes receiving the information from the first UE.

[0175] In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, obtaining the information includes obtaining the information from stored configuration information or a radio resource control configuration.

[0176] In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, transmitting the communication includes transmitting the S-SSB or the PSFCH communication based at least in part on a rule associated with transmitting the communication during the portion of the COT.

[0177] Although Figure 17 Example blocks of process 1700 are shown, but in some aspects, process 1700 can include additional blocks, fewer blocks, different blocks, or different order of blocks than those shown in FIG. 17. Figure 18Those depicted blocks can be more, fewer, different, or arranged differently than depicted. Additionally or alternatively, two or more of the blocks of process 1700 can be performed in parallel.

[0178] Figure 18 FIG. 17 is a diagram illustrating an example process 1700 performed, for example, by a first UE, in accordance with one or more aspects of the present disclosure. Example process 1700 is an example of a process for performing operations associated with COT sharing for sidelink communications.

[0179] As Figure 20 Further as shown, in some aspects, process 1700 can include obtaining a first indication of a first COT used by a second UE and shareable with the second UE (block 1710). For example, the first UE (e.g., using reception component 2002 and / or communication manager 2006, FIG. 2) can obtain a first indication of a first COT used by a second UE and shareable with the second UE, as described above. Figure 18 The depicted reception component 2002 and / or communication manager 2006 can obtain a first indication of a first COT used by a second UE and shareable with the second UE, as described above.

[0180] As Figure 20 Further as shown, in some aspects, process 1700 can include transmitting, in a portion of the first COT, an S-SSB or PSFCH communication based at least in part on the first indication (block 1720). For example, the first UE (e.g., using transmission component 2004 and / or communication manager 2006, FIG. 2) can transmit, in a portion of the first COT, an S-SSB or PSFCH communication based at least in part on the first indication, as described above. Figure 18 The depicted transmission component 2004 and / or communication manager 2006 can transmit, in a portion of the first COT, an S-SSB or PSFCH communication based at least in part on the first indication, as described above.

[0181] Process 1700 can include additional aspects, such as any single aspect or any combination of aspects described below and / or in connection with one or more other processes described elsewhere herein.

[0182] In a first aspect, the first indication indicates that the second UE is capable of transmitting the S-SSB or PSFCH communication in the portion of the first COT.

[0183] In a second aspect, alone or in combination with the first aspect, the first indication or configuration indicates that the second UE is capable of transmitting the S-SSB or PSFCH communication in the portion of the first COT independent of whether the second UE has an ID that matches a target ID indicated by the first indication.

[0184] In a third aspect, alone or in combination with one or both of the first and second aspects, obtaining the first indication includes receiving the first indication from the first UE.

[0185] In a fourth aspect, alone or in combination with one or more of the first through third aspects, obtaining the first indication includes obtaining the first indication from stored configuration information or radio resource control configuration.

[0186] In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, the first UE is a COT initiator and the second UE is a COT responder.

[0187] In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, the first indication indicates that an S-SSB slot or a PSFCH symbol in the first COT can be shared.

[0188] In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, the second UE becomes a COT initiator and the process 1800 includes transmitting a second indication of a region of a second COT that the first UE can use to transmit S-SSB or PSFCH communications by the second UE.

[0189] In an eighth aspect, alone or in combination with one or more of the first through seventh aspects, the second indication indicates that the first UE can use the region of the second COT to transmit S-SSB or PSFCH communications independent of whether the first UE has an ID that matches a target ID indicated by the second indication.

[0190] In a ninth aspect, alone or in combination with one or more of the first through eighth aspects, the first indication indicates that only the portion of the COT is shared.

[0191] In a tenth aspect, alone or in combination with one or more of the first through ninth aspects, the first indication indicates whether ID matching is to be performed for COT sharing.

[0192] Although Figure 18 Example blocks of the process 1800 are illustrated, but in some aspects, the process 1800 can include more, fewer, or different blocks than those depicted. Additionally or alternatively, two or more of the blocks of the process 1800 can be performed in parallel. Figure 19 The blocks depicted can represent one or more of any of the example processes described herein. Additionally or alternatively, the blocks depicted can represent one or more of any of the example processes described herein.

[0193] Figure 19 FIG. 19 is a diagram illustrating an example process 1900 performed, for example, by a first UE, in accordance with the present disclosure. Example process 1900 is an example of a process in which a first UE (e.g., UE 120, UE 810, UE 820) performs operations associated with COT sharing for sidelink communications.

[0194] As Figure 20As shown, in some aspects, process 1900 can include transmitting a physical sidelink channel communication in a first portion of a COT used by the first UE (block 1910). For example, the first UE (e.g., using transmission component 2004, depicted transmission component 2004, and / or communication manager 2006) can transmit a physical sidelink channel communication in a first portion of a COT used by the first UE, as described above. Figure 19 The depicted transmission component 2004 and / or communication manager 2006 can transmit a physical sidelink channel communication in a first portion of a COT used by the first UE, as described above.

[0195] As Figure 20 Further as shown, in some aspects, process 1900 can include selectively transmitting a communication in a second portion of the COT for the COT interruption gap duration based at least in part on determining whether the first UE is to use the second portion (block 1920). For example, the first UE (e.g., using transmission component 2004, depicted transmission component 2004, and / or communication manager 2006) can selectively transmit a communication in a second portion of the COT for the COT interruption gap duration based at least in part on determining whether the first UE is to use the second portion, as described above. Figure 19 The depicted transmission component 2004 and / or communication manager 2006 can selectively transmit a communication in a second portion of the COT for the COT interruption gap duration based at least in part on determining whether the first UE is to use the second portion, as described above.

[0196] Process 1900 can include additional aspects, such as any single aspect or any combination of aspects described below and / or in connection with one or more other processes described elsewhere herein.

[0197] In a first aspect, selectively transmitting a communication in the COT interruption gap duration based at least in part on determining whether to use the second portion includes transmitting the communication in the COT interruption gap duration based at least in part on determining to use the second portion of the COT, or refraining from transmitting the communication in the COT interruption gap duration based at least in part on determining not to use the second portion of the COT.

[0198] In a second aspect, alone or in combination with the first aspect, the communication is a sidelink synchronization signal block.

[0199] In a third aspect, alone or in combination with one or more of the first and second aspects, the communication is a PSFCH communication.

[0200] In a fourth aspect, alone or in combination with one or more of the first through third aspects, the communication is a physical sidelink channel communication.

[0201] In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, process 1900 includes transmitting a CPE that is based at least in part on a default CPE duration associated with the COT interruption gap duration.

[0202] In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, the default CPE duration is 16 microseconds.

[0203] Although Figure 19 Example blocks of the process 1900 are illustrated, but in some aspects, the process 1900 can include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted. Additionally, or alternatively, two or more of the blocks of the process 1900 can be performed in parallel. Figure 20 Additional blocks can be added, fewer blocks can be used, different blocks can be used, or the blocks depicted can be arranged in different orders.

[0204] Figure 1 is a diagram of an example apparatus 2000 for wireless communication in accordance with the present disclosure. The apparatus 2000 can be a UE, or a UE can include the apparatus 2000. In some aspects, the apparatus 2000 includes a reception component 2002, a transmission component 2004, and / or a communication manager 2006, which can each communicate, e.g., via one or more buses and / or one or more other components. Figures 1 to 15 The communication manager 2006 described in connection with Fig. 14. As shown, the apparatus 2000 can communicate with another apparatus 2008, such as a UE or a network node (such as a CU, a DU, an RU, or a base station), using the reception component 2002 and the transmission component 2004.

[0205] In some aspects, the apparatus 2000 can be configured to perform one or more operations described herein in connection with one or more of the methods described herein. Additionally, or alternatively, the apparatus 2000 can be configured to perform one or more processes described herein, such as process 1600 of Figure 16 Figure 17 Figure 18 Figure 19 Figure 20 In some aspects, the one or more components illustrated for the apparatus 2000 and / or one or more components can include one or more components of a UE described in connection with Figure 2 Figure 20 Additionally, or alternatively, one or more components illustrated for the apparatus 2000 can be implemented within one or more components described in connection with Figure 2 Figure 2 Additionally, or alternatively, one or more components of a set of components can be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) can be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or a processor to perform the functions or operations of the component.

[0206] ​​​​​​The reception component 2002 can receive communications, such as reference signals, control information, data communications, or any combination thereof, from the device 2008. The reception component 2002 can provide received communications to one or more other components of the device 2000. In some aspects, the reception component 2002 can perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples), and can provide the processed signals to the one or more other components of the device 2000. In some aspects, the reception component 2002 can include one or more antennas, a modem, a demodulator, a MIMO detector, a receive processor, a controller / processor, a memory, or any combination thereof, of the UE as described with reference to FIG. 1. Figure 2 The reception component 2002 can receive communications, such as reference signals, control information, data communications, or any combination thereof, from the device 2008. The reception component 2002 can provide received communications to one or more other components of the device 2000. In some aspects, the reception component 2002 can perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples), and can provide the processed signals to the one or more other components of the device 2000. In some aspects, the reception component 2002 can include one or more antennas, a modem, a demodulator, a MIMO detector, a receive processor, a controller / processor, a memory, or any combination thereof, of the UE as described with reference to FIG. 1.

[0207] The transmission component 2004 can transmit communications, such as reference signals, control information, data communications, or any combination thereof, to the device 2008. In some aspects, one or more other components of the device 2000 can generate communications and can provide the generated communications to the transmission component 2004 for transmission to the device 2008. In some aspects, the transmission component 2004 can perform signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples), and can transmit the processed signals to the device 2008. In some aspects, the transmission component 2004 can include one or more antennas, a modem, a modulator, a transmit MIMO processor, a transmit processor, a controller / processor, a memory, or any combination thereof, of the UE as described with reference to FIG. 1. In some aspects, the transmission component 2004 can be co-located with the reception component 2002 in a transceiver. Figure 20 The transmission component 2004 can transmit communications, such as reference signals, control information, data communications, or any combination thereof, to the device 2008. In some aspects, one or more other components of the device 2000 can generate communications and can provide the generated communications to the transmission component 2004 for transmission to the device 2008. In some aspects, the transmission component 2004 can perform signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples), and can transmit the processed signals to the device 2008. In some aspects, the transmission component 2004 can include one or more antennas, a modem, a modulator, a transmit MIMO processor, a transmit processor, a controller / processor, a memory, or any combination thereof, of the UE as described with reference to FIG. 1. In some aspects, the transmission component 2004 can be co-located with the reception component 2002 in a transceiver.

[0208] The communications manager 2006 can support the operations of the reception component 2002 and / or the transmission component 2004. For example, the communications manager 2006 can receive information associated with configuring reception of communications by the reception component 2002 and / or transmission of communications by the transmission component 2004. Additionally, or alternatively, the communications manager 2006 can generate control information and / or provide control information to the reception component 2002 and / or the transmission component 2004 to control the reception and / or transmission of communications.

[0209] In some aspects, the communications manager 2006 can generate, for a first UE, an indication that a second UE is able to transmit a communication during a portion of a COT used by the first UE, the portion being less than the COT in duration. The transmission component 2004 can transmit the indication to the second UE.

[0210] In some aspects associated with the second UE, the reception component 2002 can obtain information that a second UE is able to transmit a communication during a portion of a COT used by the first UE, the portion being less than the COT in duration. The transmission component 2004 can transmit the communication during the portion of the COT.

[0211] In some aspects associated with the second UE, the reception component 2002 can obtain a first indication of a first COT used by a first UE and shareable with the first UE. The transmission component 2004 can transmit an S-SSB or a PSFCH communication in a portion of the first COT based at least in part on the first indication.

[0212] In some aspects associated with the second UE, the transmission component 2004 can transmit a physical sidelink channel communication in a first portion of a COT used by a first UE. The transmission component 2004 can selectively transmit a communication in a second portion of the COT for a COT interruption gap duration based at least in part on determining whether the first UE is to use the second portion.

[0213] The transmission component 2004 can transmit a CPE that is based at least in part on a default CPE duration associated with the COT interruption gap duration.

[0214] Figure 20 The number and arrangement of components shown is provided as an example. In practice, there can be additional components, fewer components, different components, or differently arranged components than those shown. Figure 20 Additional components, different components, or differently arranged components Figure 20 Two or more components shown can be implemented within a single component, or Figure 20 A single component shown can be implemented as multiple, distributed components. Additionally or alternatively, Figure 20 A set of one or more components shown can perform one or more functions described as being performed by another set of one or more components. ​ Another set of one or more components shown can perform one or more functions described as being performed by a set of one or more components.

[0215] An overview of some aspects of the present disclosure is provided below:

[0216] Aspect 1 : A method of wireless communication performed by a first user equipment (UE), the method comprising: generating an indication that a second UE is able to transmit a communication during a portion of a channel occupancy time (COT) used by the first UE, the portion being less than the COT in duration; and transmitting the indication to the second UE.

[0217] Aspect 2: The method of aspect 1, wherein the communication is a sidelink synchronization signal block and does not include a physical sidelink feedback channel communication.

[0218] Aspect 3: The method of aspect 1, wherein the communication is a physical sidelink feedback channel communication and does not include a sidelink synchronization signal block.

[0219] Aspect 4: The method of aspect 1, wherein the communication is a sidelink synchronization signal block or a physical sidelink feedback channel communication.

[0220] Aspect 5: The method of any one of aspects 1-4, wherein the first UE is a COT initiator.

[0221] Aspect 6: A method of wireless communication performed by a second user equipment (UE), comprising: obtaining information that the second UE can transmit a communication during a portion of a channel occupancy time (COT) used by a first UE, the portion being less in duration than the first COT; and transmitting the communication during the portion of the COT.

[0222] Aspect 7: The method of aspect 6, wherein the communication is a sidelink synchronization signal block and does not include a physical sidelink feedback channel communication.

[0223] Aspect 8: The method of aspect 6, wherein the communication is a physical sidelink feedback channel communication and does not include a sidelink synchronization signal block.

[0224] Aspect 9: The method of aspect 6, wherein the communication is a sidelink synchronization signal block or a physical sidelink feedback channel communication.

[0225] Aspect 10: The method of any one of aspects 6-9, wherein obtaining the information comprises receiving the information from the first UE.

[0226] Aspect 11: The method of any one of aspects 6-10, wherein obtaining the information comprises obtaining the information from stored configuration information or a radio resource control configuration.

[0227] Aspect 12: The method of any one of aspects 6-11, wherein transmitting the communication comprises transmitting a sidelink synchronization signal block or a physical sidelink feedback channel communication based at least in part on a rule associated with transmitting a communication during a portion of a COT.

[0228] Aspect 13: A method of wireless communication performed by a second user equipment (UE), comprising: obtaining a first indication of a first channel occupancy time (COT) used by a first UE and capable of being shared with the first UE; and transmitting a sidelink synchronization signal block (S-SSB) or a physical sidelink feedback channel (PSFCH) communication in a portion of the first COT based at least in part on the first indication.

[0229] Aspect 14: The method of aspect 13, wherein the first indication indicates that the second UE can transmit the S-SSB or the PSFCH communication in the portion of the first COT.

[0230] Aspect 15: The method of any one of aspects 13-14, wherein the first indication or configuration indicates that the second UE can transmit the S-SSB or the PSFCH communication in the portion of the first COT independent of whether the second UE has an ID that matches a target ID indicated by the first indication.

[0231] Aspect 16: The method of any one of aspects 13-15, wherein obtaining the first indication comprises receiving the first indication from the first UE.

[0232] Aspect 17: The method of any one of aspects 13-16, wherein obtaining the first indication comprises obtaining the first indication from stored configuration information or a radio resource control configuration.

[0233] Aspect 18: The method of any one of aspects 13-17, wherein the first UE is a COT initiator and the second UE is a COT responder.

[0234] Aspect 19: The method of any one of aspects 13-18, wherein the first indication indicates that an S-SSB slot or a PSFCH symbol in the first COT can be shared.

[0235] Aspect 20: The method of any one of aspects 13-19, wherein the second UE becomes a COT initiator, and wherein the method comprises transmitting a second indication that the first UE can use a region of a second COT used by the second UE to transmit an S-SSB or a PSFCH communication.

[0236] Aspect 21: The method of aspect 20, wherein the second indication indicates that the first UE can transmit an S-SSB or a PSFCH communication using the region of the second COT independent of whether the first UE has an ID that matches a target ID indicated by the second indication.

[0237] Aspect 22: The method of any one of aspects 13-21, wherein the first indication indicates that only the portion of the COT is shared.

[0238] Aspect 23: The method of any one of aspects 13-22, wherein the first indication indicates whether ID matching is to be performed for COT sharing.

[0239] Aspect 24: The method of any of aspects 13-14, wherein transmitting the S-SSB or the PSFCH comprises transmitting the S-SSB or the PSFCH in a portion of the first COT based at least in part on a source identifier (ID) of the first indication matching a source ID of a unicast from the first UE and a destination ID of the first indication matching a destination ID of the unicast.

[0240] Aspect 25: The method of any of aspects 13-14, wherein transmitting the S-SSB or the PSFCH comprises transmitting the S-SSB or the PSFCH in a portion of the first COT based at least in part on a destination identifier (ID) of the first indication matching a destination ID of a broadcast or multicast.

[0241] Aspect 26: A method of wireless communication performed by a first user equipment (UE), the method comprising: transmitting a physical sidelink channel communication in a first portion of a channel occupancy time (COT) used by the first UE; and selectively transmitting a communication in a second portion of the COT for a COT interruption gap duration based at least in part on determining whether the first UE is to use the second portion.

[0242] Aspect 27: The method of aspect 26, wherein selectively transmitting the communication for the COT interruption gap duration based at least in part on determining whether the first UE is to use the second portion comprises: transmitting the communication for the COT interruption gap duration based at least in part on determining to use the second portion of the COT, or refraining from transmitting the communication for the COT interruption gap duration based at least in part on determining not to use the second portion of the COT.

[0243] Aspect 28: The method of any of aspects 26-27, wherein the communication is a sidelink synchronization signal block.

[0244] Aspect 29: The method of any of aspects 26-27, wherein the communication is a physical sidelink feedback channel communication.

[0245] Aspect 30: The method of any of aspects 26-27, wherein the communication is a physical sidelink channel communication.

[0246] Aspect 31: The method of any of aspects 26-30, the method further comprising transmitting a cyclic prefix extension (CPE) based at least in part on a default CPE duration associated with the COT interruption gap duration.

[0247] Aspect 32: The method of aspect 30, wherein the default CPE duration is 16 microseconds.

[0248] Aspect 33: An apparatus for wireless communication at a device, comprising a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of one or more of aspects 1 through 32.

[0249] Aspect 34: 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 the method of one or more of aspects 1 through 32.

[0250] Aspect 35: An apparatus for wireless communication, comprising at least one means for performing the method of one or more of aspects 1 through 32.

[0251] Aspect 36: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of one or more of aspects 1 through 32.

[0252] Aspect 37: 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 the method of one or more of aspects 1 through 32.

[0253] While the foregoing disclosure provides examples and descriptions, it is not intended to be exhaustive or to limit the aspects to the precise form disclosed. Modifications and variations are possible according to the disclosure above, or in light of the practices described in this disclosure.

[0254] As used herein, the term “component” is intended to be broadly construed as hardware and / or a combination of hardware and software. “Software” shall be broadly construed to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, and / or functions, among other examples, 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 systems and / or methods described herein can be implemented in different forms of hardware and / or a combination of hardware and software. The actual specialized control hardware or software code used to implement these systems and / or methods is not limiting of the aspects. Thus, the operation and behavior of the systems and / or methods were described herein without reference to specific software code — because software and hardware can be designed to implement the systems and / or methods, based on the description herein, without departing from the scope of the various aspects.

[0255] As used herein, depending on the context, “satisfies a threshold” can refer to a value that is 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, and / or the like.

[0256] Although specific combinations of features are set forth in the claims and / or disclosed herein, those combinations are not intended to limit the disclosure of various aspects. Many of the features described herein can be combined in ways not specifically recited in the claims and / or disclosed herein. The disclosure of various aspects includes each and every combination of the features described herein. As used herein, the phrase “at least one of’ a list of items refers to any combination of those items, including single members. As an example, “at least one of a, b, or c” is intended to cover a, b, c, a+b, a+c, b+c, and a+b+c, as well as any combination of items from among a, b, and c (e.g., a+a, a+a+a, a+a+b, a+a+c, a+b+b, a+c+c, b+b, b+b+b, b+b+c, c+c, and c+c+c, or any other ordering of a, b, and c), and is intended to cover a number of same elements (e.g., a+a+a, a+a+a+a, a+a+a+b, a+a+b+b, a+a+b+b+b, a+a+b+b+b+b, a+a+b+b+b+b+b, or any other ordering of a, b, and c).

[0257] No element, act or instruction used herein should be construed as critical or essential unless explicitly described as such. Also, as used herein, the articles “a” and “an” are intended to include one or more items, and can be used interchangeably with “one or more.” Furthermore, as used herein, the term “set” and “group” are intended to include one or more items, and can be used interchangeably with “one or more.” Where only one item is intended, the phrase “only one” or similar language will be used. Also, as used herein, the term “has” and its variants are intended to be open-ended terms that do not limit the item that the term is modifying to a single item unless otherwise indicated. Further, the phrase “based on” is intended to be open-ended, and to mean “based, at least in part, on.” Finally, as used herein, the term “or” is intended to be the inclusive or, and not the exclusive or; that is, unless specified otherwise, “or” means “and / or” unless explicitly stated otherwise.

Claims

1. A first user equipment (UE) for wireless communication, the first user equipment (UE) comprising: a memory; and one or more processors, coupled to the memory, configured to, individually or collectively: generate an indication that a second UE can transmit a communication during a portion of a channel occupancy time (COT) used by the first UE, the portion being less in duration than the COT; and transmit the indication to the second UE. the communication is a sidelink synchronization signal block and does not include a physical sidelink feedback channel communication. the communication is a physical sidelink feedback channel communication and does not include a sidelink synchronization signal block.

2. The first UE of claim 1, wherein, 4. The first UE of claim 1, wherein the first UE is a COT initiator, and wherein the communication is a sidelink synchronization signal block or a physical sidelink feedback channel communication.

3. The first UE of claim 1, wherein, 5. A second user equipment (UE) for wireless communication, the second user equipment (UE) comprising: a memory; and one or more processors, coupled to the memory, configured to, individually or collectively: obtain a first indication of a first channel occupancy time (COT) used by a first UE and sharable with the first UE; and transmit, based at least in part on the first indication, a sidelink synchronization signal block (S-SSB) or a physical sidelink feedback channel (PSFCH) communication in a portion of the first COT.

6. The second UE of claim 5, wherein the first indication indicates that the second UE can transmit the S-SSB or the PSFCH communication in the portion of the first COT.

7. The second UE of claim 5, wherein the first indication or configuration indicates that the second UE can transmit the S-SSB or the PSFCH communication in the portion of the first COT independent of whether the second UE has an identifier (ID) that matches a target ID indicated by the first indication.

8. The second UE of claim 5, wherein to obtain the first indication, the one or more processors are configured to obtain the first indication from stored configuration information or a radio resource control configuration.

9. The second UE of claim 5, wherein the first UE is a COT initiator and the second UE is a COT responder.

10. The second UE of claim 5, wherein the first indication indicates that an S-SSB slot or a PSFCH symbol in the first COT can be shared.

11. The second UE of claim 5, wherein the second UE becomes a COT initiator, and wherein the one or more processors are configured to transmit a second indication that the first UE can use a region of a second COT used by the second UE to transmit a S-SSB or a PSFCH communication. ​ ​ ​ 12. The second UE of claim 11, wherein the second indication indicates that the first UE can use the region of the second COT to transmit an S-SSB or a PSFCH communication independent of whether the first UE has an identifier (ID) that matches a target ID indicated by the second indication.

13. The second UE of claim 5, wherein, the first indication indicates that only the portion of the COT is shared.

14. The second UE of claim 5, wherein the first indication indicates whether an identifier (ID) match is to be performed for COT sharing.

15. The second UE of claim 5, wherein to transmit the S-SSB or the PSFCH, the one or more processors are configured to transmit the S-SSB or the PSFCH in a portion of the first COT based at least in part on a source identifier (ID) of the first indication matching a source ID of a unicast from the first UE and a destination ID of the first indication matching a destination ID of the unicast.

16. The second UE of claim 5, wherein to transmit the S-SSB or the PSFCH, the one or more processors are configured to transmit the S-SSB or the PSFCH in a portion of the first COT based at least in part on a destination identifier (ID) of the first indication matching a destination ID of a broadcast or multicast.

17. A first user equipment (UE) for wireless communication, comprising: a memory; and one or more processors coupled to the memory and configured to: transmit a physical sidelink channel communication in a first portion of a channel occupancy time (COT) used by the first UE; and selectively transmit a communication in a second portion of the COT for a COT interruption gap duration based at least in part on determining whether the first UE is to use the second portion.

18. The first UE of claim 17, wherein to selectively transmit the communication for the COT interruption gap duration based at least in part on determining whether the first UE is to use the second portion, the one or more processors are configured to: transmit the communication for the COT interruption gap duration based at least in part on determining to use the second portion of the COT, or avoid transmitting the communication for the COT interruption gap duration based at least in part on determining not to use the second portion of the COT.

19. The first UE of claim 17, wherein the communication is a sidelink synchronization signal block, a physical sidelink feedback channel communication, or a physical sidelink channel communication.

20. The first UE of claim 17, wherein the one or more processors are further configured to transmit a cyclic prefix extension (CPE) based at least in part on a default CPE duration associated with the COT interruption gap duration.

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