Sidelink unlicensed broadband PSFCH for enhanced capability physical sidelink feedback channel (PSFCH) format 0 or PSFCH format 2

Abstract

Aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment (UE) may receive sidelink communications in a first plurality of interlaces of a plurality of resource block (RB) sets in a shared frequency band. The UE may transmit a broadband sidelink feedback communication associated with the sidelink communication in a second plurality of interlaces of the plurality of RB sets, the broadband sidelink feedback communication being transmitted in at least a first set of physical sidelink feedback channel (PSFCH) resources having a first format. Numerous other aspects are described.

Description

[0001] Cross - Reference to Related Applications

[0002] This patent application claims priority to Greek Patent Application No. 20220100897, filed on November 3, 2022, entitled "SIDELINK UNLICENSED WIDEBAND PHYSICAL SIDELINK FEEDBACK CHANNEL (PSFCH) FOR CAPACITY ENHANCED PSFCH FORMAT 0 OR PSFCH FORMAT 2", which has been assigned to the assignee of this patent application. The disclosure of the prior application is considered to be a part of this patent application and is incorporated herein by reference. Technical Field

[0003] Aspects of the present disclosure generally relate to wireless communication and relate to techniques and apparatus for sidelink unlicensed (SL - U) wideband physical sidelink feedback channel (PSFCH) for capacity enhanced physical sidelink feedback channel (PSFCH) format 0 (PF0) or PSFCH format 2 (PF2). Background Art

[0004] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasting. A typical wireless communication system may employ a multiple access technology capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access technologies include code - division multiple access (CDMA) systems, time - division multiple access (TDMA) systems, frequency - division multiple access (FDMA) systems, orthogonal frequency - division multiple access (OFDMA) systems, single - carrier frequency - division multiple access (SC - FDMA) systems, time - division synchronous code - division multiple access (TD - SCDMA) systems, and long - term evolution (LTE). LTE / Advanced LTE is an enhanced collection of the Universal Mobile Telecommunications System (UMTS) mobile standards promulgated 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. The UE may communicate with the network node via downlink communication and uplink communication. "Downlink" (or "DL") refers to the communication link from the network node to the UE, and "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 a local link (e.g., sidelink (SL), wireless local area network (WLAN) link, and / or wireless personal area network (WPAN) link, etc.).

[0006] The above multi-access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different UEs to communicate at the urban, national, regional, and / or global levels. New Radio (NR) (which may be referred to as 5G) is an enhanced set of LTE mobile standards promulgated by 3GPP. NR is designed to better support mobile broadband Internet access by improving spectral efficiency, reducing costs, improving services, utilizing new spectrums, and better integrating with other open standards by using Orthogonal Frequency Division Multiplexing with Cyclic Prefix (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 supporting beamforming, Multiple-Input Multiple-Output (MIMO) antenna technology, and carrier aggregation. With the continuous increase in the demand for mobile broadband access, further improvements in LTE, NR, and other radio access technologies are still useful. Summary of the Invention

[0007] Some aspects described herein relate to a method of wireless communication performed by a user equipment (UE). The method may include receiving a plurality of resource block (RB) set-specific configurations, each RB set-specific configuration corresponding to a respective RB set among a plurality of RB sets in a shared frequency band, wherein each RB set-specific configuration among the plurality of RB set-specific configurations indicates at least one of a first set of physical sidelink feedback channel (PSFCH) resources having a first format or a second set of PSFCH resources having a second format different from the first format. The method may include receiving sidelink communication in at least a first interleaving of an RB set included in the plurality of RB sets. The method may include transmitting sidelink feedback communication associated with the sidelink communication in at least a second interleaving of the RB set, wherein the sidelink feedback communication is transmitted at least partially based on the RB set-specific configuration associated with the RB set.

[0008] Some aspects described herein relate to a method of wireless communication performed by a UE. The method may include receiving sidelink communication in a first plurality of interleavings of a plurality of sets of RBs in a shared band. The method may include transmitting broadband sidelink feedback communication associated with the sidelink communication in a second plurality of interleavings of the plurality of sets of RBs, the broadband sidelink feedback communication being transmitted in at least a first set of PSFCH resources having a first format.

[0009] Some aspects described herein relate to a method of wireless communication performed by a first UE. The method may include transmitting a configuration indicating a set of broadband PSFCH parameters or a set of broadband listen-before-talk (LBT) parameters to a second UE. The method may include transmitting sidelink communication to the second UE after transmitting the configuration.

[0010] Some aspects described herein relate to an apparatus for wireless communication at a UE. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to receive a plurality of RB-set specific configurations, each RB-set specific configuration corresponding to a respective RB set of a plurality of sets of RBs in a shared band, wherein each RB-set specific configuration of the plurality of RB-set specific configurations indicates at least one of a first set of PSFCH resources having a first format or a second set of PSFCH resources having a second format different from the first format. The instructions may be executable by the processor to cause the apparatus to receive sidelink communication in at least a first interleaving of an RB set included in the plurality of sets of RBs. The instructions may be executable by the processor to cause the apparatus to transmit sidelink feedback communication associated with the sidelink communication in at least a second interleaving of the RB set, wherein the sidelink feedback communication is transmitted at least in part based on the RB-set specific configuration associated with the RB set.

[0011] Some aspects described herein relate to an apparatus for wireless communication at a UE. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to receive sidelink communication in a first plurality of interleavings of a plurality of sets of RBs in a shared band. The instructions may be executable by the processor to cause the apparatus to transmit broadband sidelink feedback communication associated with the sidelink communication in a second plurality of interleavings of the plurality of sets of RBs, the broadband sidelink feedback communication being transmitted in at least a first set of PSFCH resources having a first format.

[0012] Some aspects described herein relate to an apparatus for wireless communication at a UE. The UE may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to send a configuration indicating a set of broadband PSFCH parameters or a set of broadband LBT parameters to a second UE. The instructions may be executable by the processor to cause the apparatus to send sidelink communication to the second UE after sending the configuration.

[0013] Some aspects described herein relate to a non-transitory computer-readable medium storing a set of instructions for wireless communication by a UE. The set of instructions, when executed by one or more processors of the UE, may cause the UE to receive a plurality of RB set-specific configurations, each RB set-specific configuration corresponding to a respective RB set among a plurality of RB sets in a shared frequency band, wherein each RB set-specific configuration among the plurality of RB set-specific configurations indicates at least one of a first set of PSFCH resources having a first format or a second set of PSFCH resources having a second format different from the first format. The set of instructions, when executed by one or more processors of the UE, may cause the UE to receive sidelink communication in at least a first interleaving of an RB set included in the plurality of RB sets. The set of instructions, when executed by one or more processors of the UE, may cause the UE to send sidelink feedback communication associated with the sidelink communication in at least a second interleaving of the RB set, wherein the sidelink feedback communication is sent at least in part based on the RB set-specific configuration associated with the RB set.

[0014] Some aspects described herein relate to a non-transitory computer-readable medium storing a set of instructions for wireless communication by a UE. The set of instructions, when executed by one or more processors of the UE, may cause the UE to receive sidelink communication in a first plurality of interleavings of a plurality of RB sets in a shared frequency band. The set of instructions, when executed by one or more processors of the UE, may cause the UE to send broadband sidelink feedback communication associated with the sidelink communication in a second plurality of interleavings of the plurality of RB sets, the broadband sidelink feedback communication being sent in at least a first set of PSFCH resources having a first format.

[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, may cause the first UE to send a configuration indicating a set of broadband PSFCH parameters or a set of broadband LBT parameters to a second UE. The set of instructions, when executed by one or more processors of the first UE, may cause the first UE to send sidelink communication to the second UE after sending the configuration.

[0016] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for receiving a plurality of RB set specific configurations, each RB set specific configuration corresponding to a respective RB set among a plurality of RB sets in a shared frequency band, wherein each RB set specific configuration among the plurality of RB set specific configurations indicates at least one of a first set of PSFCH resources having a first format or a second set of PSFCH resources having a second format different from the first format. The apparatus may include means for receiving sidelink communication in at least a first interleaving of an RB set included in the plurality of RB sets. The apparatus may include means for transmitting sidelink feedback communication associated with the sidelink communication in at least a second interleaving of the RB set, wherein the sidelink feedback communication is transmitted at least in part based on the RB set specific configuration associated with the RB set.

[0017] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for receiving sidelink communication in a first plurality of interleavings of a plurality of RB sets in a shared frequency band. The apparatus may include means for transmitting wideband sidelink feedback communication associated with the sidelink communication in a second plurality of interleavings of the plurality of RB sets, the wideband sidelink feedback communication being transmitted in at least a first set of PSFCH resources having a first format.

[0018] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for transmitting to a UE a configuration indicating a set of wideband PSFCH parameters or a set of wideband LBT parameters. The apparatus may include means for transmitting sidelink communication to the UE after transmitting the configuration.

[0019] Aspects generally include methods, apparatuses, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, network entities, network nodes, wireless communication devices, and / or processing systems as fully described herein with reference to the figures, the specification, and the appendices and as illustrated in the figures, the specification, and the appendices.

[0020] The features and technical advantages of examples in accordance with the present disclosure have been outlined rather broadly above so that the detailed description that follows may be better understood. Additional features and advantages will be described hereinafter. The disclosed concepts and specific examples may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein, both as to their organization and operation methods, as well as the associated advantages, will be better understood when considered in conjunction with the following description taken in connection with the accompanying figures. Each of the figures provided is for the purpose of illustration and description and not as a definition of the limits of the claims.

[0021] Although aspects are described herein by way of illustration of some examples, those skilled in the art will understand that such aspects can be implemented in many different arrangements and scenarios. The techniques described herein can be implemented using different platform types, devices, systems, shapes, sizes, and / or packaging arrangements. For example, some aspects can be implemented via an integrated chip implementation or other non-module component-based devices (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / shopping devices, medical devices, and / or artificial intelligence devices). Aspects can be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components, and / or system-level components. Devices incorporating the described aspects and features can include additional components and features for implementing and practicing the claimed and described aspects. For example, the 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). The aspects described herein are intended to be practiced in a variety of devices, components, systems, distributed arrangements, and / or end-user devices of various sizes, shapes, and configurations. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] To enable a detailed understanding of the above features of the present disclosure, a more specific description of what was briefly outlined above can be obtained by reference to aspects, some of which are illustrated in the drawings. However, it should be noted that the drawings only illustrate certain typical aspects of the present disclosure and are therefore not considered to limit its scope, as the specification may admit other equally valid aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0023] Figure 1 is a diagram illustrating an example of a wireless network according to the present disclosure.

[0024] Figure 2 is a diagram illustrating an example of communication between a network node and a user equipment (UE) in a wireless network according to the present disclosure.

[0025] Figure 3 is a diagram illustrating an example of sidelink communication according to the present disclosure.

[0026] Figure 4 is a diagram illustrating an example of sidelink communication and access link communication according to the present disclosure.

[0027] Figure 5 illustrates a sidelink communication scheme using frequency-interleaved waveforms according to the present disclosure.

[0028] Figure 6A and Figure 6BIt is a diagram illustrating an example related to mapping physical sidelink shared channel (PSSCH) communication to physical sidelink feedback channel (PSFCH) resources according to the present disclosure.

[0029] Figure 7 An example of resources related to frequency-division multiplexed PSFCH transmission according to the present disclosure is illustrated.

[0030] Figure 8 An example of resources related to time-division multiplexed PSFCH transmission according to the present disclosure is illustrated.

[0031] Figure 9A and Figure 9B It is a diagram illustrating an example related to sidelink-unlicensed (SL-U) wideband PSFCH of PSFCH format 0 (PF0) or PSFCH format 2 (PF2) for capability enhancement according to the present disclosure.

[0032] Figure 10 It is a diagram illustrating an example related to SL-U wideband PSFCH of PF0 or PF2 for capability enhancement according to the present disclosure.

[0033] Figure 11 It is a diagram illustrating an example related to SL-U wideband PSFCH of PF0 or PF2 for capability enhancement according to the present disclosure.

[0034] Figures 12 to 14 It is a diagram illustrating an example process, such as performed by a UE, according to the present disclosure.

[0035] Figure 15 It is a diagram of an example apparatus for wireless communication according to the present disclosure. Detailed Description

[0036] Aspects of the present disclosure are described more fully hereinafter with reference to the accompanying drawings. However, the present disclosure may be embodied in many different forms and should not be construed as limited to any specific structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Those skilled in the art should understand that the scope of the present disclosure is intended to cover any aspect of the disclosure disclosed herein, whether implemented independently of or in combination with any other aspect of the disclosure. For example, any number of the aspects set forth herein may be used to implement an apparatus or practice a method. In addition, the scope of the present disclosure is intended to cover such an apparatus or method practiced using other structures, functionality, or a combination of structures and functionality in addition to or different from the aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of the present invention.

[0037] Several aspects of a telecommunications system will now be presented with reference to various apparatuses and techniques. These apparatuses and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements may be implemented using hardware, software, or a combination thereof. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.

[0038] Although terms generally associated with 5G or New Radio (NR) radio access technology (RAT) may be used herein to describe aspects, aspects of the present disclosure may be applied to other RATs, such as 3G RAT, 4G RAT, and / or post-5G (e.g., 6G) RATs.

[0039] Figure 1FIG. is an example diagram illustrating a wireless network 100 in accordance with the present disclosure. The wireless network 100 can be a 5G (e.g., NR) network and / or a 4G (e.g., Long Term Evolution (LTE)) network, or can include elements of a 5G (e.g., NR) network and / or elements of a 4G (e.g., Long Term Evolution (LTE)) network, and so on. The wireless network 100 can include one or more network nodes 110 (shown as network nodes 110a, network nodes 110b, network nodes 110c, and network nodes 110d), user equipment (UE) 120 or multiple UEs 120 (shown as UEs 120a, UEs 120b, UEs 120c, UEs 120d, and UEs 120e), and / or other entities. The network nodes 110 are network nodes that communicate with the UEs 120. As shown, the network nodes 110 can include one or more network nodes. For example, the network nodes 110 can be a converged network node, which means that the converged network node is configured to utilize a radio protocol stack that is physically or logically integrated within a single radio access network (RAN) node (e.g., within a single device or unit). As another example, the network nodes 110 can be a decomposed network node (sometimes referred to as a decomposed base station), which means that the network nodes 110 are configured to utilize a protocol stack that is physically or logically distributed between two or more nodes, such as one or more central units (CUs), one or more distributed units (DUs), or one or more radio units (RUs).

[0040] In some examples, network node 110 is a network node that communicates with UE 120 via a radio access link, such as an RU, or includes a network node that communicates with UE 120 via a radio access link, such as an RU. In some examples, network node 110 is a network node that communicates with other network nodes 110 via a fronthaul link or a midhaul link, such as a DU, or includes a network node that communicates with other network nodes 110 via a fronthaul link or a midhaul link, such as a DU. In some examples, network node 110 is a network node that communicates with other network nodes 110 via a midhaul link or communicates with the core network via a backhaul link, such as a CU, or includes a network node that communicates with other network nodes 110 via a midhaul link or communicates with the core network via a backhaul link, such as a CU. In some examples, network node 110 (such as an aggregated network node 110 or a disaggregated network node 110) may include multiple network nodes, such as one or more RUs, one or more CUs, and / or one or more DUs. Network node 110 may include, for example, an NR base station, an LTE base station, a Node B, an eNB (e.g., in 4G), a gNB (e.g., in 5G), an access point, a transmission and reception point (TRP), a DU, an RU, a CU, a mobility element of the network, a core network node, a network element, network equipment, a RAN node, or a combination thereof. In some examples, network node 110 may be interconnected with one or more other network nodes 110 in the wireless network 100 or to the core network via any suitable transport network using various types of fronthaul interfaces, midhaul interfaces, and / or backhaul interfaces, such as direct physical connections, air interfaces, or virtual networks.

[0041] In some examples, network node 110 may provide communication coverage for a specific geographical area. In the 3rd Generation Partnership Project (3GPP), depending on the context in which the term is used, the term "cell" may refer to the coverage area of network node 110 and / or the network node subsystem serving that coverage area. Network node 110 may provide communication coverage for a macrocell, a picocell, a femtocell, and / or another type of cell. A macrocell may cover a relatively large geographical area (e.g., with a radius of several kilometers) and may allow unrestricted access by UE 120 with a service subscription. A picocell may cover a relatively small geographical area and may allow unrestricted access by UE 120 with a service subscription. A femtocell may cover a relatively small geographical area (e.g., a home) and may allow restricted access by UE 120 associated with the femtocell (e.g., UE 120 in a Closed Subscriber Group (CSG)). The network node 110 for a macrocell may be referred to as a macro network node. The network node 110 for a picocell may be referred to as a pico network node. The network node 110 for a femtocell may be referred to as a femto network node or a home network node. In Figure 1In the example shown, network node 110a may be a macro network node for macro cell 102a, network node 110b may be a pico network node for pico cell 102b, and network node 110c may be a femto network node for femto cell 102c. A network node may support one or more (e.g., three) cells. In some examples, a cell may not necessarily be stationary, and the geographical area of a cell may move according to the location of a moving network node 110 (e.g., a mobile network node).

[0042] In some aspects, the term "base station" or "network node" may 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, "base station" or "network node" may refer to a CU, a DU, an RU, a near real-time (near RT) RAN intelligent controller (RIC), or a non-real-time (non RT) RIC, or a combination thereof. In some aspects, the term "base station" or "network node" may refer to a single 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" may refer to multiple devices configured to perform one or more functions. For example, in some distributed systems, each of multiple different devices (which may be located at the same geographical location or different geographical locations) may be configured to perform at least a portion of a function, or to repeatedly perform at least a portion of the function, and the term "base station" or "network node" may refer to any one or more of these different devices. In some aspects, the term "base station" or "network node" may refer to one or more virtual base stations or one or more virtual base station functions. For example, in some aspects, two or more base station functions may be instantiated on a single device. In some aspects, the term "base station" or "network node" may refer to one base station function among base station functions, rather than another base station function. In this way, a single device may include more than one base station.

[0043] Wireless network 100 may 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., network node 110 or UE 120) and transmit the data to a downstream node (e.g., UE 120 or network node 110). A relay station may be a UE 120 capable of relaying transmissions for other UEs 120. In Figure 1 the example shown, network node 110d (e.g., a relay network node) may communicate with network node 110a (e.g., a macro network node) and UE 120d to facilitate communication between network node 110a and UE 120d. A network node that relays communication may be referred to as a relay station, a relay base station, a relay network node, a relay node, a relay, etc.

[0044] The wireless network 100 can be a heterogeneous network that includes different types of network nodes 110, such as macro network nodes, pico network nodes, femto network nodes, relay network nodes, etc. These different types of network nodes 110 can have different transmission power levels, different coverage areas, and / or different impacts on interference in the wireless network 100. For example, a macro network node can have a high transmission power level (e.g., 5 watts to 40 watts), while pico network nodes, femto network nodes, and relay network nodes can have lower transmission power levels (e.g., 0.1 watt to 2 watts).

[0045] The network controller 130 can be coupled to or communicate with a set of network nodes 110 and can provide coordination and control for these network nodes 110. The network controller 130 can communicate with the network nodes 110 via a backhaul communication link or a midhaul communication link. The network nodes 110 can also communicate directly with each other or indirectly via wireless or 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.

[0046] UEs 120 can be dispersed throughout the wireless network 100, and each UE 120 can be stationary or mobile. The UE 120 can include, for example, an access terminal, a terminal, a mobile station, and / or a subscriber unit. The 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 computer, a camera, a gaming device, a netbook, a smartbook, a superbook, 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 vehicle component or sensor, a smart meter / sensor, industrial manufacturing equipment, a global positioning system device, UE functionality of a network node, and / or any other suitable device configured to communicate via wireless or wired media.

[0047] Some UEs 120 may be considered machine type communication (MTC) or evolved or enhanced machine type communication (eMTC) UEs. The MTC UEs and / or eMTC UEs may include, for example, robots, drones, remote devices, sensors, meters, monitors, and / or location tags that may communicate with a network node, another device (e.g., a remote device), or some other entity. Some UEs 120 may be considered Internet of Things (IoT) devices and / or may be implemented as narrowband IoT (NB-IoT) devices. Some UEs 120 may be considered customer premises equipment. The UE 120 may be included inside a housing that houses components of the UE 120, such as a processor component and / or a memory component. In some examples, the processor component and the memory component may be coupled together. For example, the processor component (e.g., one or more processors) and the memory component (e.g., a memory) may be operatively coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0048] Generally, any number of radio networks 100 may be deployed in a given geographical area. Each radio network 100 may support a specific RAT and may operate on one or more frequencies. The RAT may be referred to as a radio technology, an air interface, etc. The frequency may be referred to as a carrier, a frequency channel, etc. Each frequency in a given geographical area may support a single RAT to avoid interference between radio networks of different RATs. In some cases, an NR or 5G RAT network may be deployed.

[0049] In some examples, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly using one or more sidelink channels (e.g., communicate with each other without using the network node 110 as an intermediate device). For example, the UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., may include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, or vehicle-to-pedestrian (V2P) protocols), and / or a mesh network. In such examples, the UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by the network node 110.

[0050] Devices of the wireless network 100 can communicate using the electromagnetic spectrum, which can be subdivided into various categories, bands, channels, etc. according to frequency or wavelength. For example, devices of the wireless network 100 can communicate using one or more operating bands. In 5G NR, two initial operating bands have been identified as Frequency Range Designation FR1 (410 MHz to 7.125 GHz) and FR2 (24.25 GHz to 52.6 GHz). It should be understood that although a part of FR1 is greater than 6 GHz, in various documents and articles, FR1 is generally (interchangeably) referred to as the "sub-6 GHz" band. Regarding FR2, a similar naming issue sometimes occurs, which is generally (interchangeably) referred to as the "millimeter wave" band in documents and articles, although it is different from the Extremely High Frequency (EHF) band (30 GHz to 300 GHz) identified as the "millimeter wave" band by the International Telecommunication Union (ITU).

[0051] Frequencies between FR1 and FR2 are generally referred to as mid-band frequencies. Recent 5G NR research has identified operating bands for these mid-band frequencies as Frequency Range Designation FR3 (7.125 GHz to 24.25 GHz). Bands falling within FR3 can inherit FR1 characteristics and / or FR2 characteristics, and thus can effectively extend the features of FR1 and / or FR2 to mid-band frequencies. In addition, higher frequency 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 Designation FR4a or FR4-1 (52.6 GHz to 71 GHz), FR4 (52.6 GHz to 114.25 GHz), and FR5 (114.25 GHz to 300 GHz). Each of these higher bands falls within the EHF band.

[0052] Considering the above examples, unless otherwise specifically stated, it should be understood that if the term "sub-6 GHz" etc. is used in this article, this term can generally represent frequencies that can be below 6 GHz, can be within FR1, or can include mid-band frequencies. Additionally, unless otherwise specifically stated, it should be understood that if the term "millimeter wave" etc. is used in this article, this term can generally represent frequencies that can include mid-band frequencies, can be within FR2, FR4, FR4-a or FR4-1, and / or FR5, or can be within the EHF band. It is envisioned that the frequencies included in these operating bands (e.g., FR1, FR2, FR3, FR4, FR4-a, FR4-1, and / or FR5) can be modified, and the techniques described in this article apply to those modified frequency ranges.

[0053] In some aspects, UE 120 may include a communication manager 140. As described in more detail elsewhere herein, the communication manager 140 may receive a plurality of RB set specific configurations, each RB set specific configuration corresponding to a respective RB set among a plurality of RB sets in a shared frequency band, wherein each RB set specific configuration among the plurality of RB set specific configurations indicates at least one of a first set of PSFCH resources having a first format or a second set of PSFCH resources having a second format different from the first format; receive sidelink communication in at least a first interleaving of an RB set included in the plurality of RB sets; and transmit sidelink feedback communication associated with the sidelink communication in at least a second interleaving of the RB set, wherein the sidelink feedback communication is transmitted at least in part based on the RB set specific configuration associated with the RB set. In some aspects, the communication manager 140 may receive sidelink communication in a first plurality of interleavings of a plurality of RB sets in a shared frequency band; and transmit wideband sidelink feedback communication associated with the sidelink communication in a second plurality of interleavings of the plurality of RB sets, the wideband sidelink feedback communication being transmitted in at least a first set of PSFCH resources having a first format. In some aspects, the communication manager 140 may send a configuration indicating a set of wideband PSFCH parameters or a set of wideband LBT parameters to a second UE; and after sending the configuration, send sidelink communication to the second UE. Additionally or alternatively, the communication manager 140 may perform one or more other operations described herein.

[0054] As indicated above, Figure 1 is provided as an example. Other examples may be different from the example Figure 1 described with respect to

[0055] Figure 2 FIG. 200 is a diagram illustrating an example 200 of communication between a network node 110 and a UE 120 in a wireless network 100 according to the present disclosure. The network node 110 may be equipped with a set of antennas 234a through 234t, such as T antennas (T≥1). The UE 120 may be equipped with a set of antennas 252a through 252r, such as R antennas (R≥1). The network node 110 of example 200 includes one or more radio frequency components, such as antennas 234 and a modem 232. In some examples, the network node 110 may include an interface, a communication component, or another component that facilitates communication with the UE 120 or another network node. Some network nodes 110 may not include radio frequency components that facilitate direct communication with the UE 120, such as one or more CUs or one or more DUs.

[0056] At network node 110, a transmit processor 220 may receive data destined for UE 120 (or a set of UEs 120) from a data source 212. The transmit processor 220 may select one or more modulation and coding schemes (MCSs) for the UE 120 based at least in part on one or more channel quality indicators (CQIs) received from the UE 120. The network node 110 may process (e.g., encode and modulate) the data for the UE 120 based at least in part on the MCS selected for the UE 120 and may provide data symbols for the UE 120. The transmit processor 220 may process system information (e.g., for semi-static resource allocation information (SRPI)) and control information (e.g., CQI requests, grants, and / or upper layer signaling) and may provide overhead symbols and control symbols. The transmit processor 220 may generate reference symbols for reference signals (e.g., cell-specific reference signals (CRSs) or demodulation reference signals (DMRSs)) and synchronization signals (e.g., primary synchronization signals (PSSs) or secondary synchronization signals (SSSs)). A transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, control symbols, overhead symbols, and / or reference symbols, if applicable, and may provide a set of output symbol streams (e.g., T output symbol streams) to a corresponding set of modems 232 (e.g., T modems) (shown as modems 232a through 232t). For example, each output symbol stream may be provided to a modulator component (shown as MOD) of a modem 232. Each modem 232 may process the corresponding output symbol stream (e.g., for OFDM) using the corresponding modulator component to obtain a stream of output samples. Each modem 232 may also process the stream of output samples (e.g., convert to analog, amplify, filter, and / or up-convert) using the corresponding modulator component to obtain a downlink signal. Modems 232a through 232t may transmit a set of downlink signals (e.g., T downlink signals) via a corresponding set of antennas 234 (e.g., T antennas) (shown as antennas 234a through 234t).

[0057] At the UE 120, a set of antennas 252 (shown as antennas 252a through 252r) may receive downlink signals from the network node 110 and / or other network nodes 110 and may provide a set of received signals (e.g., R received signals) to a set of modems 254 (e.g., R modems) (shown as modems 254a through 254r). For example, each received signal may be provided to a demodulator component (shown as DEMOD) of the modem 254. Each modem 254 may use the corresponding demodulator component to condition (e.g., filter, amplify, down-convert, and / or digitize) the received signal to obtain input samples. Each modem 254 may use the demodulator component to further process the input samples (e.g., for OFDM) to obtain received symbols. The MIMO detector 256 may obtain the received symbols from the modems 254, may perform MIMO detection on the received symbols when applicable, and may provide the detected symbols. The receive processor 258 may process (e.g., demodulate and decode) the detected symbols, may provide the decoded data for the UE 120 to the data sink 260, and may provide the decoded control information and system information to the controller / processor 280. The term "controller / processor" may refer to one or more controllers, one or more processors, or a combination thereof. The channel processor may determine reference signal received power (RSRP) parameters, received signal strength indicator (RSSI) parameters, reference signal received quality (RSRQ) parameters, and / or CQI parameters, etc. In some examples, one or more components of the UE 120 may be included in the housing 284.

[0058] The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292. The network controller 130 may include, for example, one or more devices in a core network. The network controller 130 may communicate with the network node 110 via the communication unit 294.

[0059] One or more antennas (e.g., antennas 234a through 234t and / or antennas 252a through 252r) may include one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, and / or one or more antenna arrays, etc., or may be included within one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, and / or one or more antenna arrays, etc. The antenna panel, antenna group, set of antenna elements, and / or antenna array may include one or more antenna elements (in a single housing or multiple housings), a set of coplanar antenna elements, a set of non-coplanar antenna elements, and / or one or more antenna elements coupled to one or more transmit and / or receive components (such as Figure 2 one or more components in

[0060] On the uplink, at the UE 120, the transmit processor 264 may receive and process data from the data source 262 and control information from the controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, and / or CQI). The transmit processor 264 may generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be pre-decoded by the TX MIMO processor 266, where applicable, further processed by the modem 254 (e.g., for DFT-s-OFDM or CP-OFDM), and sent to the network node 110. In some examples, the modem 254 of the UE 120 may include a modulator and a demodulator. In some examples, the UE 120 includes a transceiver. The transceiver may include any combination of an antenna 252, a modem 254, a MIMO detector 256, a receive processor 258, a transmit processor 264, and / or a TX MIMO processor 266. The transceiver may be used by a processor (eg, controller / processor 280) and memory 282 to perform the functions described herein (eg, reference Figures 9A to 15 )Aspects of any of the methods described herein.

[0061] At the network node 110, uplink signals from the UE 120 and / or other UEs may be received by the antenna 234, processed by the modem 232 (e.g., a demodulator component (shown as DEMOD) of the modem 232), detected by the MIMO detector 236 (where applicable), and further processed by the receive processor 238 to obtain decoded data and control information transmitted by the UE 120. The receive processor 238 may provide the decoded data to the data sink 239 and the decoded control information to the controller / processor 240. The network node 110 may include a communication unit 244 and may communicate with the network controller 130 via the communication unit 244. The network node 110 may include a scheduler 246 to schedule one or more UEs 120 for downlink communication and / or uplink communication. In some examples, the modem 232 of the network node 110 may include a modulator and a demodulator. In some examples, the network node 110 includes a transceiver. The transceiver may include any combination of antenna 234, modem 232, MIMO detector 236, receive processor 238, transmit processor 220, and / or TX MIMO processor 230. The transceiver may be used by a processor (e.g., controller / processor 240) and memory 242 to perform operations described herein (e.g., with reference to Figures 9A to 15 )Aspects of any of the methods described herein.

[0062] The controller / processor 240 of network node 110, the controller / processor 280 of UE 120, and / or Figure 2 any other component of may perform one or more techniques associated with a sidelink unlicensed (SL-U) broadband physical sidelink feedback channel (PSFCH) for physical sidelink feedback channel format 0 (PF0) or physical sidelink feedback channel format 2 (PF2), 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 of may execute or direct, for example Figure 12 process 1200 of, Figure 13 process 1300 of, Figure 14 process 1400 of, and / or the operation of other processes as described herein. Memories 242 and 282 may store data and program code for network node 110 and UE 120, respectively. In some examples, memories 242 and / or 282 may include non-transitory computer-readable media storing one or more instructions (e.g., code and / or program code) for wireless communication. For example, when the one or more instructions are executed (e.g., directly executed, or after compilation, transformation, and / or interpretation) by one or more processors of network node 110 and / or UE 120, the one or more processors, UE 120, and / or network node 110 may execute or direct, for example Figure 12 process 1200 of, Figure 13 process 1300 of, Figure 14 process 1400 of, and / or the operation of other processes as described herein. In some examples, executing the instructions may include running the instructions, transforming the instructions, compiling the instructions, and / or interpreting the instructions, and so on.

[0063] In some aspects, UE 120 includes components for receiving a plurality of RB set-specific configurations, each RB set-specific configuration corresponding to a respective RB set among a plurality of RB sets in a shared frequency band, wherein each of the plurality of RB set-specific configurations indicates at least one of a first set of PSFCH resources having a first format or a second set of PSFCH resources having a second format different from the first format; components for receiving sidelink communications in at least a first interleaving of an RB set included in the plurality of RB sets; and components for transmitting sidelink feedback communications associated with the sidelink communications in at least a second interleaving of the RB set, wherein the sidelink feedback communications are transmitted at least in part based on the RB set-specific configuration associated with the RB set. In some aspects, UE 120 includes components for receiving sidelink communications in a first plurality of interleavings of a plurality of RB sets in a shared frequency band; and / or components for transmitting wideband sidelink feedback communications associated with the sidelink communications in a second plurality of interleavings of the plurality of RB sets, the wideband sidelink feedback communications being transmitted in at least a first set of PSFCH resources having a first format. In some aspects, UE 120 includes components for sending a configuration indicating a set of wideband PSFCH parameters or a set of wideband LBT parameters to a second UE; and / or components for sending sidelink communications to the second UE after sending the configuration. The components for UE 120 to perform the operations described herein may include, for example, one or more of 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.

[0064] Although Figure 2 the boxes in are illustrated as different components, the functions described above for these boxes may be implemented in a single hardware, software, or combined component or in various combinations of components. For example, the functions described for transmit processor 264, receive processor 258, and / or TX MIMO processor 266 may be performed by or under the control of controller / processor 280.

[0065] As indicated above, Figure 2 is provided as an example. Other examples may be different from the examples described with respect to Figure 2

[0066] ​The deployment of a communication system (such as a 5G NR system) can be arranged with various components or constituent parts in a variety of ways. In a 5G NR system or network, network nodes, network entities, mobility elements of the network, RAN nodes, core network nodes, network elements, base stations, or network equipment can be implemented in a converged or decomposed architecture. For example, a base station (such as Node B (NB), evolved NB (eNB), NR base station, 5G NB, access point (AP), TRP, or cell, etc.) or one or more units (or one or more components) performing base station functionality can be implemented as a converged base station (also referred to as a stand-alone base station or monolithic base station) or a decomposed base station. A "network entity" or "network node" can refer to a decomposed base station or one or more units of a decomposed base station (such as one or more CUs, one or more DUs, one or more RUs, or a combination thereof).

[0067] A converged base station (e.g., a converged network node) can be configured to utilize a radio protocol stack that is physically or logically integrated within a single RAN node (e.g., within a single device or unit). A decomposed base station (e.g., a decomposed network node) can be configured to utilize a protocol stack that is physically or logically distributed among 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. A DU can be implemented to communicate with one or more RUs. Each of the CU, DU, and RU can also be implemented as a virtual unit, such as a virtual central unit (VCU), a virtual distributed unit (VDU), or a virtual radio unit (VRU), etc.

[0068] Base station type operations or network designs can consider the aggregation characteristics of base station functionality. For example, a decomposed 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 the scaling of a communication system by separating base station functionality into one or more units that can be deployed separately. A decomposed 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 achieve flexibility in network design. The individual units of a decomposed base station can be configured for wired or wireless communication with at least one other unit of the decomposed base station.

[0069] Figure 3 FIG. is an illustration of Example 300 of sidelink communication in accordance with the present disclosure.

[0070] As Figure 3As shown, the first UE 305-1 may 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 may communicate using one or more sidelink channels 310 for P2P communication, D2D communication, V2X communication (e.g., which may include V2V communication, V2I communication, and / or V2P communication) and / or mesh networking. In some aspects, the UE 305 (e.g., UE 305-1 and / or UE 305-2) may correspond to one or more other UEs described elsewhere herein, such as the UE 120. In some aspects, one or more sidelink channels 310 may use the PC5 interface and / or may operate in a high frequency band (e.g., 5.9 GHz band). Additionally or alternatively, the UE 305 may use Global Navigation Satellite System (GNSS) timing to synchronize the timing of transmission time intervals (TTIs) (e.g., frames, subframes, time slots, or symbols).

[0071] As Figure 3 Further shown, one or more sidelink channels 310 may include a Physical Sidelink Control Channel (PSCCH) 315, a Physical Sidelink Shared Channel (PSSCH) 320, and / or a PSFCH 325. The PSCCH 315 may be used to convey control information, similar to the Physical Downlink Control Channel (PDCCH) and / or the Physical Uplink Control Channel (PUCCH) for cellular communication with the network node 110 via an access link or access channel. The PSSCH 320 may be used to convey data, similar to the Physical Downlink Shared Channel (PDSCH) and / or the Physical Uplink Shared Channel (PUSCH) for cellular communication with the network node 110 via an access link or access channel. For example, the PSCCH 315 may carry sidelink control information (SCI) 330, which may indicate various control information for sidelink communication, such as one or more resources (e.g., time resources, frequency resources, and / or spatial resources), where a transport block (TB) 335 may be carried on the PSSCH 320. The TB 335 may include data. The PSFCH 325 may be used to 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 scheduling request (SR).

[0072] Although shown on the PSCCH 315, in some aspects, the SCI 330 may include multiple communications at different levels, such as a first-level SCI (SCI-1) and a second-level SCI (SCI-2). The SCI-1 may be transmitted on the PSCCH 315. The SCI-2 may be transmitted on the PSSCH 320. The SCI-1 may include, for example, an indication of one or more resources (e.g., time resources, frequency resources, and / or spatial resources) on the PSSCH 320, information for decoding sidelink communications on the PSSCH, a quality of service (QoS) priority value, a resource reservation period, a PSSCH DMRS mode, an SCI format for the SCI-2, a β offset for the SCI-2, the number of PSSCH DMRS ports, and / or an MCS. The SCI-2 may include information associated with data transmission on the PSSCH 320, such as a hybrid automatic repeat request (HARQ) process identifier (ID), a new data indicator (NDI), a source identifier, a destination identifier, and / or a channel state information (CSI) report trigger.

[0073] In some aspects, one or more sidelink channels 310 may use a resource pool. For example, a scheduling assignment (e.g., included in the SCI 330) may be transmitted across time in a subchannel using a specific resource block (RB). In some aspects, data transmission (e.g., on the PSSCH 320) associated with the scheduling assignment may occupy adjacent RBs in the same subframe as the scheduling assignment (e.g., using frequency division multiplexing). In some aspects, the scheduling assignment and the associated data transmission are not transmitted on adjacent RBs.

[0074] In some aspects, the UE 305 may operate using a sidelink transmission mode (e.g., mode 1), where resource selection and / or scheduling is performed by the network node 110 (e.g., a base station, CU, or DU). For example, the UE 305 may receive (e.g., directly or via one or more network nodes) from the network node 110 a grant for sidelink channel access and / or scheduling (e.g., in downlink control information (DCI) or in a radio resource control (RRC) message, such as a configured grant). In some aspects, the UE 305 may operate using a transmission mode (e.g., mode 2), where resource selection and / or scheduling is performed by the UE 305 (e.g., instead of the network node 110). In some aspects, the UE 305 may perform resource selection and / or scheduling by sensing the channel availability for transmission. For example, the UE 305 may measure the RSSI parameter associated with various sidelink channels (e.g., the sidelink - RSSI (S - RSSI) parameter), may measure the RSRP parameter associated with various sidelink channels (e.g., the PSSCH - RSRP parameter), and / or may measure the RSRQ parameter associated with various sidelink channels (e.g., the PSSCH - RSRQ parameter), and may select a channel for transmitting sidelink communication at least partially based on the measurement results.

[0075] Additionally or alternatively, the UE 305 may use the SCI 330 received in the PSCCH 315 to perform resource selection and / or scheduling, and the SCI may indicate the occupied resources and / or channel parameters. Additionally or alternatively, the UE 305 may perform resource selection and / or scheduling by determining the channel busy rate (CBR) associated with each sidelink channel, and the channel busy rate (CBR) may be used for rate control (e.g., by indicating the maximum number of resource blocks that the UE 305 may use for a particular set of subframes).

[0076] In the transmission mode where the UE 305 performs resource selection and / or scheduling, the UE 305 may generate a sidelink grant and may send the grant in the SCI 330. The sidelink grant may indicate, for example, one or more parameters (e.g., transmission parameters) to be used for an upcoming sidelink transmission, such as one or more resource blocks (e.g., for the TB 335) to be used for an upcoming sidelink transmission on the PSSCH 320, one or more subframes to be used for an upcoming sidelink transmission, and / or the MCS to be used for an upcoming sidelink transmission. In some aspects, the UE 305 may generate a sidelink grant that indicates one or more parameters for semi - persistent scheduling (SPS), such as the periodicity of sidelink transmissions. Additionally or alternatively, the UE 305 may generate a sidelink grant for event - driven scheduling (such as for on - demand sidelink messages).

[0077] In some aspects, the techniques and apparatus associated with the SL-U wideband PSFCH for PF0 or PF2 for capability enhancement described herein may be for side-link communication applications such as those described for Figure 3 side-link communication applications.

[0078] As indicated above, Figure 3 is provided as an example. Other examples may be different from the examples described for Figure 3 the examples described.

[0079] Figure 4 FIG. 400 is a diagram illustrating an example of sidelink communication and access link communication in accordance with the present disclosure.

[0080] As Figure 4 shown, a transmitter (Tx) / receiver (Rx) UE 405 and an Rx / Tx UE 410 may communicate with each other via a sidelink, as described above in connection with Figure 3 the description. As further shown in the figure, in some sidelink modes, a network node 110 may communicate with the Tx / Rx UE 405 (e.g., directly or via one or more network nodes) such as via a first access link. Additionally or alternatively, in some sidelink modes, the network node 110 may communicate with the Rx / Tx UE 410 (e.g., directly or via one or more network nodes) such as via a first access link. The Tx / Rx UE 405 and / or the Rx / Tx UE 410 may correspond to one or more UEs described elsewhere herein, such as Figure 1 UE 120. Thus, a direct link between UEs 120 (e.g., via the PC5 interface) may be referred to as a sidelink, and a direct link between the network 110 and a UE 120 (e.g., via the Uu interface) may be referred to as an access link. Sidelink communication may be transmitted via the sidelink, and access link communication may be transmitted via the access link. Access link communication may be downlink communication (from the network node 110 to the UE 120) or uplink communication (from the UE 120 to the network node 110).

[0081] In some aspects, the techniques and apparatus associated with the SL-U wideband PSFCH for PF0 or PF2 for capability enhancement described herein may be for side-link communication and access link communication applications such as those described for Figure 4 side-link communication and access link communication applications.

[0082] As indicated above, Figure 4 is provided as an example. Other examples may be different from the examples described for Figure 4 the examples described.

[0083] Figure 5Illustrates sidelink communication scheme 500 using frequency-interleaved waveforms according to the present disclosure. Scheme 500 can be used by a network node (e.g., network node 110) and UEs (e.g., UEs 120, 305, 405 / 410, etc.) to communicate on frequency band 502, which can be a shared radio frequency band or an unlicensed band. In Figure 5 the x-axis represents time in some arbitrary units, and the y-axis represents frequency in some arbitrary units. Frequency band 502 can have, for example, a bandwidth of about 10 megahertz (MHz) or about 20 MHz and a subcarrier spacing (SCS) of about 5 kilohertz (kHz), about 30 kHz, or about 20 kHz. Frequency band 502 can be located at any suitable frequency. In some aspects, frequency band 502 can be located at about 3.5 GHz, 6 GHz, or 60 GHz. Scheme 500 allocates resources for sidelink communication between UEs in units of frequency interleaving 508.

[0084] The frequency interleaving is shown as 508 I(0) to 508 (M-1) where M is a positive integer. Each frequency interleaving 508 I(i) can include K multiple RBs 510 spaced (uniformly) apart on frequency band 502, where K is a positive integer and i is a value between 0 and M - 1. In other words, the RBs 510 in a particular frequency interleaving 508 I(i) are spaced apart from each other by at least one other RB 510. The frequency interleaving 508 I(0) as shown includes RBs 510 from cluster 504 C(0) to 504 C(K-1) . The values of K and M can vary based on several factors, such as the bandwidth of frequency band 502, SCS, and / or power spectral density (PSD) limitations. In one example, network node 110 can assign frequency interleaving 508 I(0) for sidelink communication between a pair of UEs 120, and can assign frequency interleaving 508 I(1) for sidelink communication between another pair of UEs 120. In Figure 5 the assignment of frequency interleaving 508 I(0) is shown as a patterned box. In some other examples, network node 110 can assign multiple frequency interleavings 508 (e.g., frequency interleavings 508 I(0) and 508 I(1) ) for sidelink communication between a pair of UEs.

[0085] A set of M localized RBs 510 forms a cluster 504. As shown, frequency interleavings 508 I(0) to 508 I(M-1) form K clusters 504 C(0) to 504 C(K-1)。Each RB 510 can span the frequency and time period 514 of approximately twelve consecutive sub - carriers 512. In Figure 5 the example shown, the indices of the sub - carriers 512 range from 0 to 11. The sub - carriers 512 can also be referred to as resource elements (REs). The time period 514 can span any suitable number of OFDM symbols 506. In some aspects, the time period 514 can correspond to a TTI, which can include approximately fourteen OFDM symbols 506.

[0086] The number of clusters 504 or the value of K can depend on the amount of frequency distribution required to maintain a particular bandwidth occupancy. As an example, scheme 500 can divide the frequency band 502 into ten clusters 504 (e.g., K = 10) and distribute the allocations across the ten clusters 504 to increase the frequency occupancy of the allocation. In one aspect, the frequency band 502 can have a bandwidth of approximately 20 MHz, and each sub - carrier 512 can span a frequency of approximately 15 kHz. In such an aspect, the frequency band 502 can include approximately ten frequency interlaces 508 (e.g., M = 10). For example, an allocation can include one frequency interlace 508 having ten distributed or equally - spaced - apart RBs 510. Compared to an allocation with a single RB or ten localized RBs, an interlaced allocation with ten distributed RBs 510 allows the UE to transmit with a higher bandwidth occupancy.

[0087] In another aspect, the frequency band 502 can have a bandwidth of approximately 10 MHz, and each sub - carrier 512 can span a frequency of approximately 15 kHz. In such an aspect, the frequency band 502 can include five frequency interlaces 508 (e.g., M = 5). Similarly, an allocation can include one frequency interlace 508 having ten distributed RBs 510. An interlaced allocation with ten distributed RBs can allow a wider bandwidth occupancy than an allocation with a single RB or ten localized RBs.

[0088] In another aspect, the frequency band 502 can have a bandwidth of approximately 20 MHz, and each sub - carrier 512 can span a frequency of approximately 30 kHz. In such an aspect, the frequency band 502 can include five frequency interlaces 508 (e.g., M = 5). Similarly, an allocation can include one frequency interlace 508 having ten distributed RBs 510. An interlaced allocation with ten distributed RBs can allow a wider bandwidth occupancy than an allocation with a single RB or ten localized RBs.

[0089] In some aspects, the RB 510 is a physical resource block (PRB), and each frequency interlace 508 can include PRBs evenly spaced in the frequency band 502.

[0090] In scheme 500, the assigned frequency interlace 508 (e.g., frequency interlace 508 I(0)) Sidelink communication on [the relevant entity] may include PSSCH communication (e.g., PSSCH communication 320) and PSCCH communication (e.g., PSCCH communication 315). Thus, in solution 500, sidelink transmission may have a frequency-interleaved waveform. If band 502 is a shared radio frequency band or an unlicensed band, the UE needs to perform a listen-before-talk (LBT) procedure before transmitting in the assigned frequency interleaving 508. When the result of the LBT procedure is passed, the UE may continue to use the assigned frequency interleaving 508 to transmit PSSCH data and / or PSCCH control information to another UE. The PSSCH control information may be sent in the form of an SCI, which may be similar to the PDCCH DCI sent by a network node to the UE. When the result of the LBT procedure is a failure, the UE may be prohibited from transmitting in the assigned frequency interleaving. To reduce the LBT latency, in some scenarios, solution 500 may configure the UE to multiplex PSSCH and PSCCH in the same frequency interleaving 508 (e.g., using a frequency-division multiplexing (FDM) scheme and / or a time-division multiplexing (TDM) scheme).

[0091] In some aspects, the techniques and apparatuses described herein associated with the SL-U wideband PSFCH for capability enhancement may be applied in association with sidelink communication using a frequency-interleaved waveform as described for Figure 5 [the relevant entity].

[0092] As indicated above, Figure 5 is provided as an example. Other examples may be different from the example described for Figure 5 [the relevant entity].

[0093] Figure 6A and Figure 6B are diagrams illustrating examples according to the present disclosure associated with mapping PSSCH communication to PSFCH resources.

[0094] A UE (e.g., UE 120, UE 305, UE 405, etc.) may be configured with sidelink feedback resources for PSFCH communication that indicates whether PSSCH communication is received. For example, the UE may be configured with PSFCH resources for PSFCH, such as HARQ ACK / NACK feedback associated with improving communication reliability. In this regard, the first UE and the second UE may use HARQ to communicate PSSCH data (e.g., PSSCH communication), and use the assigned frequency interleaving to communicate HARQ ACK / NACK feedback. For example, the first UE may send a PSSCH communication carrying PSSCH data to the second UE via a sidelink interface. The PSSCH data packet may be sent in the form of a TB. If the second UE successfully receives the PSSCH data, the second UE may use the assigned frequency interleaving to send a PSFCH communication carrying HARQ ACK to the first UE. Conversely, if the second UE fails to successfully receive the PSSCH communication, the second UE may use the assigned frequency interleaving to send a PSFCH carrying HARQ NACK to the first UE. Upon receiving the HARQ NACK from the second UE, the first UE may re - send the PSSCH data in another PSSCH communication.

[0095] In some scenarios, multiple PSFCH communications are sent simultaneously, where each PSFCH communication corresponds to a respective PSSCH communication. Thus, the second UE sending the PSFCH communication may map each PSSCH communication to a corresponding PSFCH resource according to a mapping scheme. In some aspects, the PSFCH resource may include a set of RBs, an interleaving, and / or a cyclic shift (CS) pair, or be defined based on them.

[0096] Reference Figure 6A , the first UE may communicate multiple PSSCH communications 606 with the second UE i(j) . For example, in some aspects, the first UE may communicate multiple TBs carrying PSSCH data in corresponding PSSCH resources 630. The PSSCH resource 630 includes multiple PSSCH interleavings 604 in one or more sets of RBs 602 i . Although a single set of RBs 602 is shown in Figure 6A and Figure 6B , it should be understood that the PSSCH communication 606 i(j) may span more than one set of RBs, such as two sets of RBs, three sets of RBs, four sets of RBs, eight sets of RBs, etc. In some aspects, each PSSCH communication 606 i(j) may correspond to one of the multiple interleavings of the RB 604 i . The interleaving 604 i is illustrated as a logical interleaving. Each interleaving 604 of the RBi may include a plurality of RBs spaced apart from each other by at least one other RB in the RB set 602. In the illustrated example, the RB set 602 includes four PSSCH interlaces 604 of RBs i . The PSFCH resource 640 may correspond to the same RB set 602. In other aspects, the PSFCH resource 640 may include one or more other RB sets to replace or supplement the PSSCH RB set 602.

[0097] In Figure 6A the illustrated example, the RB set 602 includes four PSSCH interlaces 604 of RBs i . A plurality of PSSCH communications 606 i(j) are distributed among the interlaces 604 i and the first time slot 608 0 and the second time slot 608 1 . Thus, each PSSCH communication 606 i(j) corresponds to an interlace i and a time slot j. Thus, Figure 6A the suffix provided for each PSSCH communication 606 i(j) in may indicate both the interlace index i and the time slot index j. For example, the PSSCH communication 606 2(0) may correspond to an interlace index of 2 and a time slot index of 0. Example 600 also includes a plurality of PSFCH resources 640, including four PSFCH interlaces 610 distributed within the RB set 602 k . In this regard, the PSFCH resource 640 may use the same RB set 602 as the PSSCH resource 630. In other aspects, the PSFCH resource 640 may use a different RB set or RB set configuration from the PSSCH resource 630. The PSFCH resource 640 includes the same number of interlaces 610 as the PSSCH resource 630 in the scheme 600 k . Thus, example 600 may include mapping the PSSCH communication 606 from one PSSCH interlace 604 in the RB set 602 i to the corresponding PSFCH interlace 610 in the RB set 602 k . In some aspects, the PSSCH communication 606 i(j) may span more than one interlace 604 and / or more than one RB set 602. Thus, in some aspects, the scheme 600 may include mapping the PSSCH communication 606 from one set of the RB set 602 i(j) to the corresponding set in the RB set of the PSFCH resource 640. In some aspects, the PSSCH communication 606 i(j) may span multiple RB sets, and example 600 may include mapping the PSSCH communication 606 from multiple RB setsi(j) is mapped to a PSFCH resource within a first set of RBs among multiple sets of RBs. In another aspect, scheme 600 may include mapping PSSCH communication 606 spanning multiple sets of RBs to the same multiple sets of RBs within PSFCH resource 640. In another aspect, scheme 600 may include mapping PSSCH communication 606 i(j) from a set of PSSCH interlaces to a corresponding set of PSFCH interlaces. In some aspects, each PSSCH interlace 604 i may be associated with an interlace index i, and each PSFCH interlace 610 k may be associated with an interlace index k. In some aspects, the index of PSSCH interlace 604 i may be the same as the index of PSFCH interlace 610 k . In other aspects, the index of the PSSCH interlace may be different from the index of the PSFCH interlace. In other aspects, a single set of interlace indices may be used for both PSSCH resource 630 and PSFCH resource 640.

[0098] In some aspects, PSSCH communication 606 i(j) is mapped to PSFCH resource 640 based on RB set 602 and interlace 604 i . For example, PSSCH communication 606 0(0) and 606 0(1) are mapped to PSFCH interlace 610 in RB set 602 0 . In Figure 6A an example where PSFCH resource 640 includes the same number of logical interlaces 610 within RB set 602, PSSCH communication 606 may be further mapped to PSFCH resource 640 based on time slot index 608 j . In this regard, each PSFCH interlace 610 k may include multiple sets of CS pairs 616, where each set of CS pairs includes one or more CS pairs. For example, the CS pairs include CS pairs 612, 614. PSSCH communication 606 i(j) may be mapped to one or more CS pairs in PSFCH resource 640.

[0099] In some aspects, the mapping may include a one-to-one mapping from PSSCH interleaving and slot index to corresponding PSSCH interleaving and corresponding CS pair sets within a PSFCH period. In one aspect, the PSSCH preamble RB set and interleaving may be the interleaving and RB set that carry or include the SCI-1 that schedules PSSCH communication. If the PSSCH resource 630 includes the same number of RB sets and the same number of interleavings as the PSFCH resource 640, the mapping may include a one-to-one mapping between the PSSCH interleaving and RB set and the PSSCH interleaving within the same RB set.

[0100] Reference Figure 6B , in some aspects, the number of PSFCH interleavings within an RB set may be less than the number of PSSCH interleavings. Figure 6B Example 650 in includes a PSSCH resource 630 having four interleavings 604 within an RB set 602. The PSFCH resource 640 includes three interleavings 610 within the RB set 602. Thus, in example 650, the UE may partition the total number of CS pairs in the PSFCH resource 640 and map the PSSCH communication 606 to the corresponding partitioned CS pair sets based on the preamble PSSCH interleaving. In this regard, although the number of PSFCH interleavings may be less than or otherwise different from the number of PSSCH interleavings, the UE may map one or more PSSCH preamble RB sets to one or more corresponding PSFCH RB sets.

[0101] In some aspects, there may be 2, 3, 4, 6, and / or any other suitable number of CS pairs within the interleaving of an RB. In this regard, Figure 6A and Figure 6B shows that the PSFCH resource 640 has three CS pairs in each CS pair set, with six CS pairs in each PSFCH interleaving 610. Thus, the UE may map the PSSCH from the first time slot to the first CS pair set in the interleaving, and map the PSSCH from the second time slot to the second CS pair set in the interleaving.

[0102] In some aspects, a UE may receive wideband SL communications that occupy resources in more than one RB set. For example, in some aspects, PSSCH communications may be associated with the interleaving of RBs within two or more RB sets. The UE may receive wideband PSSCH communications during a Channel Occupancy Time (COT), and may transmit sidelink feedback (e.g., ACK / NACK) in PSFCH resources within the same COT. In some aspects, for a UE that initiates a COT, the COT may continue in the RB set in which the sidelink feedback is transmitted. However, in some aspects, the COT may terminate in the RB set in which the PSSCH is transmitted but the PSFCH is not transmitted. In some aspects, a receiving UE may transmit a PSFCH waveform in more than one RB set among the RB sets in which the PSSCH is transmitted, such that the COT may continue for some or all of the PSSCH RB sets.

[0103] In some aspects, the techniques and apparatus described herein associated with SL-U wideband PSFCH for capability enhancement may be applied in association with mapping PSSCH communications to PSFCH resources as described for FIG. 6.

[0104] As indicated above, Figure 6A and Figure 6B are provided as examples. Other examples may be different from the examples described for Figure 6A and Figure 6B described.

[0105] Figure 7 Illustrates an example of a resource 700 associated with frequency division multiplexed PSFCH transmission in accordance with the present disclosure. The resource 700 may be implemented by aspects of a wireless communication network 100. For example, the resource 700 may be implemented for communication by one or more UEs (e.g., UE 120, UE 305, UE 405, etc.). In Figure 7 the x-axis represents time in some arbitrary units, and the y-axis represents frequency in some arbitrary units.

[0106] In some aspects, a first sidelink UE (e.g., UE 120, UE 305, UE 405) may receive a configuration from a second sidelink UE (e.g., UE 120, UE 305, UE 405) associated with multiplexing a PSFCH 710 having a first format (e.g., PF0) with a PSFCH 712 having a second format (e.g., PF2). In some aspects, the second format may be different from the first format. In some aspects, the first sidelink UE may receive the configuration from the second sidelink UE via an SCI, an RRC message, a media access control (MAC) control element, PSCCH communication, PSSCH communication, etc. Additionally or alternatively, the first sidelink UE may operate in sidelink mode 1 and receive the configuration from a network element (e.g., network node 110) via an RRC message, a MAC control element, a PDSCH message, a PDCCH message, etc.

[0107] In some aspects, the configuration may indicate a resource pool associated with at least one of the first format (e.g., PF0) or the second format (e.g., PF2). In some aspects, the configuration received by the first sidelink UE may indicate a resource pool associated with at least one of the first format or the second format. The resource pool may indicate time resources (e.g., symbol 714, time slot) associated with the first format and / or the second format. The resource pool may indicate frequency resources (e.g., resource block 716, frequency interleaving, orthogonal cover code (OCC) index, RE, subchannel, bandwidth part, spectrum, etc.) associated with the first format and / or the second format. The first UE may receive an indicator from the second sidelink UE indicating the resources to be used for transmitting the PSFCH 710 and / or the second PSFCH. In this regard, the first UE may receive the indicator from the second sidelink UE via an SCI (e.g., SCI-1 and SCI-2). For example, a code point (e.g., index) in the SCI may indicate (e.g., dynamically indicate) a set of time-frequency resources in the resource pool that the first sidelink UE should use to transmit the PSFCH710 and / or the PSFCH 712.

[0108] In some aspects, the first sidelink UE may receive one or more TBs from the second sidelink UE. In this regard, the first sidelink UE may receive one or more TBs via the PSSCH. The first sidelink UE may send PSFCH communication (e.g., ACK / NACK) associated with the one or more TBs received from the second sidelink UE to the second sidelink UE based on the configuration. In this regard, the first sidelink UE may send the PSFCH communication to the second sidelink UE via multiplexing a PSFCH 710 having a first format with a second PSFCH having a second format.

[0109] In some aspects, the first format may be multiplexed with the second format in the frequency domain. For example, asFigure 7 As shown, the PSFCH 710 having a first format can be frequency interleaved with the PSFCH 712 having a second format. In one example, the frequency interleaving can be repeated over five frequency ranges (e.g., over five sub-channels) or over another number of sub-channels. For example, the PSFCH 710 with PF0 can occupy 7 consecutive sub-channels, while the PSFCH 712 with PF2 occupies a single sub-channel adjacent to the 7 consecutive sub-channels. For example, the PSFCH 712 with PF2 can occupy sub-channel index (0), while the PSFCH 710 with PF0 can occupy sub-channel indices (1) to (4), and the PSFCH 712 with PF2 can occupy sub-channel index (5), while the PSFCH 710 with PF0 can occupy sub-channel indices (6) to (9), and so on. Other interleaving structures can be used during implementation. In some aspects, the interleaving can be repeated over resource blocks 716 and / or over bandwidth parts (e.g., 5 MHz bandwidth part, 10 MHz bandwidth part, 20 MHz bandwidth part, 40 MHz bandwidth part, 80 MHz bandwidth part, etc.). In some aspects, the first / second format frequency interleaving (e.g., PF0 / PF2 frequency interleaving) can be sent over a single symbol 714 (e.g., symbol index 12 or other symbol index) and / or over another number of symbols (e.g., any one of symbol indices 0 to 13).

[0110] In some aspects, the techniques and apparatus described herein associated with the SL-U wideband PSFCH for capacity enhancement can be applied in association with the frequency division multiplexed PSFCH transmission as described for Figure 7 the frequency division multiplexed PSFCH transmission as described for

[0111] As indicated above, Figure 7 is provided as an example. Other examples can be different from the examples described for Figure 7 the examples described for

[0112] Figure 8 Illustrates an example of a resource 800 associated with time division multiplexed PSFCH transmission in accordance with the present disclosure. The resource 800 can be implemented by aspects of a wireless communication network 100. For example, the resource 800 can be implemented for communication by one or more UEs (e.g., UE 120, UE 305, UE 405, etc.). In Figure 8 the x-axis represents time in some arbitrary units, and the y-axis represents frequency in some arbitrary units.

[0113] ​In some aspects, a first sidelink UE may receive a configuration indicating a PSFCH periodicity 802. The PSFCH periodicity 802 may indicate a periodicity at which the first sidelink UE shall transmit a PSFCH 810 having a first format (e.g., PF0) and / or a PSFCH 812 having a second format (e.g., PF2). In some aspects, the first sidelink UE may dynamically receive a configuration for multiplexing the first PSFCH format and the second PSFCH format. For example, the configuration may indicate that the first sidelink UE will transmit the PSFCH 810 without multiplexing the PSFCH 810 with the PSFCH 812. The first sidelink UE may then receive (e.g., via an RRC reconfiguration message) an updated configuration indicating that the first sidelink UE is to multiplex the PSFCH 810 with the PSFCH 812. The first sidelink UE may receive the updated configuration indicating whether the first sidelink UE will transmit the PSFCH 810 without multiplexing the PSFCH 810 with the PSFCH 812 or whether the first sidelink UE will transmit the PSFCH 810 multiplexed with the PSFCH 812. The updated configuration may be based on, for example, the amount of TBs received by the first sidelink UE over a period of time. Additionally or alternatively, the updated configuration indicating that the first sidelink UE shall multiplex the PSFCH 810 with the PSFCH 812 may be valid for a period of time after the first sidelink UE receives the updated configuration. After the expiration of this period of time, the first sidelink UE may resume transmitting the PSFCH 810 without multiplexing the PSFCH 810 with the PSFCH 812.

[0114] In some aspects, a PSFCH 810 having a first format (e.g., PF0) may be multiplexed in the time domain with a PSFCH 812 having a second format (e.g., PF2). In this regard, a first sidelink UE may transmit the PSFCH 810 in one or more symbols (e.g., multiple consecutive symbols) with a PSFCH periodicity 802 indicated by this configuration. The PSFCH periodicity 802 may be based on an integer number of time slots or sub - time slots (e.g., 1, 2, 3, 4 or more time slots or sub - time slots). For example, the first sidelink UE may transmit a PSFCH 810 having a first format in a single symbol in time slot 804(0). The first sidelink UE may transmit another PSFCH 810 having a first format in a single symbol in time slot 804(0 + 2n) based on the PSFCH periodicity 802. The PSFCH periodicity 802 may be based on an integer number (e.g., n) of time slots. The first sidelink UE may transmit a PSFCH812 having a second format in one or more symbols (e.g., multiple consecutive symbols) in time slot 804(0 + n) and time slot 804(0 + 3) with the PSFCH periodicity 802. However, the PSFCH 812 having a second format may be transmitted at a time offset from the PSFCH 810 having a first format. For example, the PSFCH 812 having a second format may be transmitted from the PSFCH 810 having a first format with a PF2 offset 806 based on the number of time slots or sub - time slots (e.g., 1, 2, 3, 4 or more time slots or sub - time slots offset from the PSFCH format 0 810).

[0115] In some aspects, the techniques and apparatus associated with SL - U wideband PSFCH for capability enhancement described herein may be applied in association with time - division multiplexed PSFCH transmission as described for Figure 8 what is described.

[0116] As indicated above, Figure 8 is provided as an example. Other examples may be different from the examples described for Figure 8 what is described.

[0117] Wireless communication can be configured to support sidelink communication, which enables broadband COT communication (e.g., broadband PSSCH communication sent during a COT) to be sent by a transmitter UE on multiple RB sets for reception by a receiver UE. In such scenarios, if sidelink feedback communication (e.g., PSFCH communication) is to be sent by the receiver UE during broadband COT communication (e.g., in the middle of broadband COT communication), the PSFCH should be broadband so that the transmitter UE can resume transmission of broadband COT communication after the PSFCH. To support such operation, in some systems, the receiver UE can be configured to send a broadband PSFCH in one or more of the RB sets in the RB set occupied by the PSSCH. Here, for PSFCH format PF0, the receiver UE can map the PSFCH resources to the PSFCH interleaving in all the configured RB sets in the data resource pool and can send the (truncated) PSFCH waveform in the associated PSSCH RB set. In some aspects, the receiver UE selects the same PSFCH interleaving across all RB sets, where the PSFCH interleaving is determined based on the PSSCH allocation in one of the RB sets in the RB set or in the leading RB set.

[0118] In addition, in some systems, an interleaved PSFCH waveform can be utilized to meet the occupied channel bandwidth (OCB) requirement or power spectral density requirement of SL-U. However, an interleaved waveform based on interleaved RBs (IRBs) may not allow sufficient UE multiplexing capability. For example, an IRB-based interleaved waveform can occupy 10 RBs. Here, for a total of 5 interleavings for a 30 KHz SCS and 6 CS pairs, one PSFCH symbol can only multiplex 30 UEs with a 50 RB bandwidth. Therefore, for a given bandwidth, the UE multiplexing capability is 10 times smaller than that of the legacy PSFCH (e.g., because the interleaved waveform occupies 10 RBs while the legacy PSFCH occupies 1 RB). Thus, if a PSFCH instance is shared by multiple PSSCH receiver UEs (e.g., multiple receiver UEs receiving PSSCH), one PSFCH symbol may not have sufficient resources to enable the receiver UEs to send PSFCH feedback. For example, one PSFCH symbol may only have 30 resources in which the PSFCH can be sent, but there are more than 30 receiver UEs that need to send PSFCH. The multicast option 2 scenario - a scenario where the transmitter UE can transmit to a large number of receivers and requires ACK / NACK from all receiver UEs - is a scenario where such a limitation can be detrimental. One technique to solve this UE capability problem is to configure the sidelink UE such that each PSFCH communication occupies a common interleaving and zero or one or more dedicated physical RBs. Another technique to solve the UE capability problem is to configure the sidelink UE such that each PSFCH communication occupies one or more dedicated physical RBs and one or more common physical RBs.

[0119] In addition, as described above, in some systems, different PSFCH formats can be frequency-division multiplexed on different interleavings, or can be time-division multiplexed on different PSFCH instances, with some configured partitioning. For example, a PF0 interleaved PSFCH (e.g., for carrying one-bit ACK / NACK) can be multiplexed (e.g., FDM or TDM) with a PF2 interleaving (e.g., for carrying multiple ACK / NACK). In some aspects, PF0 and PF2 cannot be multiplexed in the same interleaving and the same PSFCH symbol, and the PF0 PSFCH resources and PF2 PSFCH resources need to be orthogonal in time or frequency. Here, each link can be configured with a corresponding partitioned PF0 / PF2 PSFCH resource pool.

[0120] As described above, to solve the problem of the continued difficulty of broadband COT communication across PSFCH communications, the PF0 PSFCH waveform can be repeated in all the RB sets occupied by the broadband COT communication. However, when using PF2 PSFCH, a broadband PSFCH needs to be defined. In addition, if a capability-enhanced PF0 is introduced, a broadband PSFCH needs to be defined to maintain broadband COT.

[0121] Some of the techniques and apparatuses described herein implement SL-U wideband PSFCH for enhanced capabilities of PF0 or PF2. In some aspects, a UE may receive multiple RB set specific configurations, where each RB set specific configuration corresponds to a respective RB set of multiple RB sets in a shared band, and each RB set specific configuration indicates a first set of PSFCH resources having a first format or a second set of PSFCH resources having a second format. Here, the UE may receive sidelink communication in at least a first interleaving of the RB sets included in the multiple RB sets, and may transmit sidelink feedback communication associated with the sidelink communication in at least a second interleaving of the RB sets and at least partially based on the RB set specific configuration associated with the RB set. In some aspects, the UE may receive sidelink communication in a first plurality of interleavings of multiple RB sets in a shared band, and may transmit wideband sidelink feedback communication associated with the sidelink communication in a second plurality of interleavings of the multiple RB sets, where the wideband sidelink feedback communication is transmitted in at least a first set of PSFCH resources having a first format. In some aspects, the UE may send a configuration indicating a set of wideband PSFCH parameters or a set of wideband LBT parameters to another UE, and may send sidelink communication to the other UE after sending the configuration. In some aspects, for scenarios where PSFCH utilizes enhanced capabilities of PF0 or PF2, the techniques and apparatuses described herein implement the continuation of wideband COT communication (e.g., PSSCH communication) across PSFCH communication, thereby increasing network flexibility and improving sidelink communication reliability. Additional details are provided below.

[0122] Figure 9A and Figure 9B is a diagram illustrating an example associated with SL-U wideband PSFCH for enhanced capabilities of PF0 or PF2 according to the present disclosure. As Figure 9A shown, example 900 includes communication between UE 120-1 and UE 120-2. In some aspects, a UE 120 (e.g., UE 120-1 or UE 120-2) may correspond to UE 305, UE 405, UE 410, or another device as described herein. In some aspects, UE 120-1 and UE 120-2 may be included in a wireless network (such as wireless network 100). UE120-1 and UE 120-2 may communicate via a wireless access link (such as a sidelink) (e.g., in unlicensed spectrum).

[0123] As indicated by reference numeral 902, UE 120-1 may receive multiple RB set specific configurations. In some aspects, as Figure 9AAs indicated, UE 120-1 may receive multiple RB set-specific configurations from UE 120-2 (e.g., via a sidelink). Additionally or alternatively, UE 120-1 may receive multiple RB set-specific configurations from another device such as network node 110 (not shown).

[0124] An RB set-specific configuration is a configuration associated with a specific RB set via which sidelink communications (e.g., PSSCH communications) and / or sidelink feedback communications (e.g., PSFCH communications) may be transmitted or received. In some aspects, each RB set-specific configuration corresponds to a respective RB set of multiple RB sets in a shared frequency band. For example, referring to Figure 9B , the first RB set-specific configuration among multiple RB set-specific configurations may correspond to RB set 0, the second RB set-specific configuration among multiple RB set-specific configurations may correspond to RB set 1, the third RB set-specific configuration among multiple RB set-specific configurations may correspond to RB set 2, and so on. Here, a given RB set may correspond to RB set 602 described herein (e.g., for Figure 6A and Figure 6B ). Thus, in some aspects, a given RB set may include PSSCH resources corresponding to multiple PSSCH interlaces and PSFCH resources corresponding to multiple PSSCH interlaces (e.g., as described above for Figure 6A and Figure 6B ).

[0125] In some aspects, each RB set-specific configuration indicates a first set of PSFCH resources having a first format or a second set of PSFCH resources having a second format different from the first format. In some aspects, the first format may be PF0, and the second format may be PF2. Alternatively, in some aspects, the first format may be PF2, and the second format may be PF0. As an example, referring to Figure 9B , the RB set-specific configuration associated with RB set 0 may indicate a first set of PSFCH resources having a first format (e.g., PF0) and a second set of PSFCH having a second format (e.g., PF2). As another example, the RB set-specific configuration associated with RB set 1 may indicate a first set of PSFCH resources having a first format and a second set of PSFCH resources having a second format. As another example, the RB set-specific configuration associated with RB set 2 may indicate only a first set of PSFCH resources having a first format (i.e., the second format may not be configured for RB set 2). In this regard, in some aspects, the multiple RB set-specific configurations may include RB set-specific configurations indicating a first set of PSFCH resources having a single format (e.g., PF0 or PF2).

[0126] In some aspects, asFigure 9B As illustrated by the example shown in, a plurality of RB set specific configurations include a first RB set specific configuration that is different from a second RB set specific configuration. That is, the configuration of the PSFCH can be different between some RB set specific configurations.

[0127] Returning to Figure 9A , as shown by reference numeral 904, UE 120-2 may transmit sidelink communication in at least a first interleaving of the RB sets included in the plurality of RB sets, and UE 120-1 may receive sidelink communication in the at least first interleaving. For example, UE 120-2 may transmit PSSCH communication in PSSCH resources corresponding to one or more PSSCH interleavings of RB set 0, and UE 120-1 may receive PSSCH communication in the PSSCH resources.

[0128] As shown by reference numeral 906, UE 120-1 may transmit sidelink feedback communication associated with sidelink communication in at least a second interleaving of the RB sets, and UE 120-2 may receive sidelink feedback communication associated with sidelink communication in at least a second interleaving of the RB sets, where the sidelink feedback communication is transmitted at least in part based on an RB set specific configuration associated with the RB set. For example, UE 120-1 may transmit PSFCH communication associated with PSSCH communication in one or more PSFCH interleavings of RB set 0 (e.g., one or more PSFCH interleavings mapped to one or more PSSCH interleavings), and UE 120-2 may receive PSFCH communication associated with PSSCH communication in the one or more PSFCH interleavings. Here, UE120-1 may transmit PSFCH communication at least in part based on an RB set specific configuration associated with the RB set (e.g., such that UE 120-1 transmits PSFCH communication using an appropriate PSFCH format indicated by the RB set specific configuration).

[0129] In some aspects, in a scenario where the PSFCH utilization capability enhances PF0 or PF2, the RB set specific configuration may enable the continuation of broadband COT communication (e.g., PSSCH communication) across PSFCH communication, thereby increasing network flexibility and improving sidelink communication reliability.

[0130] As indicated above, Figure 9A and Figure 9B are provided as examples. Other examples may be different from the examples described for Figure 9A and Figure 9B which.

[0131] Figure 10FIG. is an illustration of example 1000 associated with SL-U wideband PSFCH for PF0 or PF2 for capability enhancement according to the present disclosure. As Figure 10 shown, the example includes communication between UE 120-1 and UE 120-2. In some aspects, UE120 (e.g., UE 120-1 or UE 120-2) may correspond to UE 305, UE 405, UE 410, or another device as described herein. In some aspects, UE 120-1 and UE 120-2 may be included in a wireless network (such as wireless network 100). UE120-1 and UE 120-2 may communicate via a wireless access link (such as a sidelink) (e.g., in unlicensed spectrum).

[0132] As indicated by reference numeral 1002, UE 120-2 may transmit sidelink communication in a first plurality of interlaces of a plurality of RB sets in a shared band, and UE 120-1 may receive sidelink communication in the first plurality of interlaces. For example, UE 120-2 may transmit PSSCH communication in PSSCH resources corresponding to one or more PSSCH interlaces of a first RB set and a second RB set, and UE 120-1 may receive PSSCH communication in the PSSCH resources.

[0133] As indicated by reference numeral 1004, UE 120-1 may transmit wideband sidelink feedback communication associated with sidelink communication in a second plurality of interlaces of a plurality of RB sets, and UE 120-2 may receive wideband sidelink feedback communication associated with sidelink communication in the second plurality of interlaces of a plurality of RB sets. For example, UE 120-1 may transmit in one or more PSFCH interlaces (e.g., one or more PSFCH interlaces mapped to one or more PSSCH interlaces) of a first RB set and a second RB set, and UE 120-2 may receive PSFCH communication associated with PSSCH communication in the one or more PSFCH interlaces. In some aspects, UE 120-1 transmits wideband sidelink feedback communication in at least a first set of PSFCH resources having a first format.

[0134] In some aspects, the first format is PF2. That is, in some aspects, the wideband sidelink feedback communication may be wideband PSFCH communication having PF2. In some such aspects, each of the plurality of RB sets uses the same RB set configuration for PSFCH resources. That is, if the wideband sidelink feedback communication is wideband PF2 PSFCH communication, then in some aspects, the plurality of RB sets may use the same RB set configuration for PSFCH resources.

[0135] In some aspects, UE 120-1 transmits wideband sidelink feedback communication such that the waveform associated with the first format (e.g., PF2) spans multiple RB sets. Here, UE 120-1 may transmit wideband sidelink feedback communication such that the DMRS spans multiple RB sets (e.g., such that the long DMRS spans all RB sets). Additionally, in some such aspects, the payload of the wideband sidelink feedback communication matches the RB rate in the second plurality of interleaved or multiple RB sets.

[0136] In some aspects, UE 120-1 transmits wideband sidelink feedback communication such that the waveform associated with the first format is repeated in each of the multiple RB sets. For example, UE 120-1 may transmit wideband sidelink feedback communication such that 20 MHz PF2 PSFCH is repeated in each of the multiple RB sets. In some such aspects, the frequency division OCC (FD-OCC) sequence is randomized across the multiple RB sets. In some aspects, the transmission of the PSFCH communication in the COT may require a single LBT in each of the RB sets in the RB set. In some aspects, the repetition of the waveform increases the HARQ robustness because the PSFCH is repeated in multiple RB sets and the transmission in each RB set is gated by the LBT result at each RB set (e.g., partial transmission may be performed by truncating the RB sets that do not pass the LBT).

[0137] In some aspects, UE 120-1 transmits sidelink feedback communication such that feedback information is carried in at least one of the multiple RB sets and a COT hold signal is carried in at least one other of the multiple RB sets. That is, in some aspects, the feedback information (e.g., ACK / NACK) does not need to be carried by all RB sets (e.g., the feedback information may be carried only in the leading RB sets) and the COT hold signal may be transmitted in the remaining RB sets. In some aspects, such operation enables the PSFCH resources in the remaining RB sets to be used by other links, thereby improving network throughput and reducing the latency associated with other communications.

[0138] In some aspects, the UE 120-1 transmits wideband sidelink feedback communication in a first set of RBs among multiple sets of RBs according to a first format and in a common interleaving within a set of reserved CS RBs or in a second set of RBs among the multiple sets of RBs according to a second format. For example, the UE 120-1 may transmit a 20 MHz PF2 PSFCH in a leading set of RBs of the COT and may transmit a PF0 PSFCH in reserved CS resources in the remaining set of RBs. In some such aspects, the UE 120-1 may transmit sidelink feedback communication such that feedback information is carried in the first set of RBs and a COT hold signal is carried in one or more other sets of RBs. In some such aspects, if the UE 120-1 is configured such that each PSFCH communication will occupy a common interleaving and zero or one or more dedicated physical RBs, the UE 120-1 may utilize PF0 in the PF0 common interleaving or reserved CS resources to transmit the COT hold signal. Alternatively, if the UE 120-1 is configured such that each PSFCH communication will occupy one or more dedicated physical RBs and one or more common physical RBs, the UE 120-1 may utilize PF0 in the PF0 reserved CS and any interleaving in the PF0 resource pool to transmit the COT hold signal.

[0139] In some aspects, the RB set configuration for PSFCH resources varies among the RB sets in the multiple sets of RBs. That is, the PSFCH resources may be configured differently among the multiple sets of RBs (e.g., according to as described above for Figure 9A and Figure 9B(the different RB set specific configurations described). In some such aspects, the UE 120-1 transmits broadband sidelink feedback communications in one or more of a plurality of RB sets according to a first format, wherein the PSFCH resources corresponding to the interleaves in the second plurality of interleaves are configured for the first format. Here, the UE 120-1 may transmit broadband sidelink feedback communications according to a second format in a set of reserved CS RBs or in a common interleave within at least one of the plurality of RB sets, wherein the PSFCH resources corresponding to the interleave are configured for the second format. For example, in some aspects, the UE 120-1 may repeat the 20MHz PF2 PSFCH in the same interleave in the RB set, where the PF2 resources in the same interleave are available. Otherwise, the UE 120-1 may transmit a PF0-based COT hold signal in the reserved CS (e.g., in the same interleave) or in the common interleave. In some aspects, some RB sets may not include any PF2 resources, or PF2 resources in the same interleave index as in the primary RB set. In such scenarios, such resources are allocated for PF0. For those RB sets, in some aspects, the UE 120-1 may transmit a PF0-based COT hold signal (e.g., in the reserved CS resources of the same interleave, or in the common interleave). Thus, in some aspects, the UE 120-1 may transmit a COT hold signal in the set of reserved CS RBs or in the common interleave in at least one RB set, wherein the PSFCH resources corresponding to the interleave are configured for the second format.

[0140] In some aspects, the first format is PF0. That is, in some aspects, the broadband sidelink feedback communication may be a broadband PSFCH communication with PF0 (e.g., enhanced-capability PF0). In some such aspects, the UE 120-1 may transmit broadband sidelink feedback communications such that the repetition of the RBs carrying feedback information (e.g., ACK / NACK) is carried in each of the plurality of RB sets. Here, the UE 120-1 may transmit broadband sidelink feedback communications such that the repetition of the common interleave is carried in at least one of the plurality of RB sets (e.g., if the UE 120-1 is configured such that each PSFCH communication will occupy the common interleave and zero or one or more dedicated physical RBs). Alternatively, the UE 120-1 may transmit broadband sidelink feedback communications such that the repetition of a set of reserved CS RBs is carried in at least one of the plurality of RB sets (e.g., if the UE 120-1 is configured such that each PSFCH communication will occupy one or more dedicated physical RBs and one or more common physical RBs). In some aspects, CS ramp-up may be performed across different RB sets for the reserved CS RBs, the common interleave RBs, or the interleaved RBs carrying feedback information to reduce the peak-to-average power ratio (PAPR).

[0141] In some aspects, UE 120-1 may send broadband sidelink feedback communications such that there is a repetition of RBs carrying feedback information in at least one of a plurality of RB sets and such that there is a repetition of a common interleaving in other RB sets of the plurality of RB sets. Additionally or alternatively, UE 120-1 may send broadband sidelink feedback communications such that there is a repetition of RBs carrying feedback information in at least one of a plurality of RB sets and such that there is a repetition of a set of reserved CS RBs in other RB sets of the plurality of RB sets.

[0142] As indicated above, Figure 10 is provided as an example. Other examples may be different from the example described for Figure 10 which.

[0143] Figure 11 is a diagram illustrating Example 1100 associated with an SL-U broadband PSFCH for PF0 or PF2 for capacity enhancement according to the present disclosure. As Figure 11 shown, Example 1100 includes communications between UE 120-1 and UE 120-2. In some aspects, UE 120 (e.g., UE 120-1 or UE 120-2) may correspond to UE 305, UE 405, UE 410, or another device as described herein. In some aspects, UE 120-1 and UE 120-2 may be included in a wireless network (such as wireless network 100). UE120-1 and UE 120-2 may communicate via a wireless access link (such as a sidelink) (e.g., in an unlicensed spectrum).

[0144] The channel access type associated with sending broadband sidelink feedback communications (e.g., broadband PSFCH) may be no LBT, type 2A LBT, type 2B LBT, or type 1 LBT. It is noted that broadband LBT may allow all-or-nothing LBT (e.g., such that only full transmission is allowed) or independent LBT (e.g., such that partial transmission is allowed). Thus, in some aspects, UE 120-2 (i.e., the transmitter UE 120) may need to indicate to UE 120-1 (i.e., the receiver UE) one or more broadband PSFCH parameters (e.g., including an indication of whether a broadband PSFCH is needed) and / or a set of channel access parameters (e.g., a set of parameters associated with performing broadband LBT).

[0145] In one example, as shown by reference numeral 1102, UE 120-2 may send a configuration indicating a set of broadband PSFCH parameters or a set of broadband LBT parameters to UE 120-1. In some aspects, the set of PSFCH parameters indicates one or more RB sets in which UE 120-1 will transmit broadband sidelink feedback communications associated with sidelink communications. That is, in some aspects, the configuration may identify one or more RB sets in which UE 120-1 will transmit broadband PSFCH. Additionally or alternatively, the set of PSFCH parameters may indicate cyclic prefix extension (CPE) parameters that will be used by UE 120-1 in association with transmitting broadband sidelink feedback communications associated with sidelink communications. Additionally or alternatively, the set of LBT parameters may indicate the type of LBT that will be performed by UE 120-1 prior to transmitting broadband sidelink feedback communications associated with sidelink communications. That is, in some aspects, the configuration may identify the type of LBT that will be performed in association with PSFCH transmission.

[0146] In some aspects, UE 120-2 may send an indication that UE 120-1 will transmit broadband sidelink feedback communications associated with sidelink communications, and UE 120-1 may receive the indication. For example, UE 120-2 may determine that UE 120-2 will resume transmission of sidelink communications after a PSFCH instance and may send (e.g., together with or separately from the configuration) an indication regarding UE 120-1 transmitting broadband sidelink feedback communications associated with sidelink communications. Thus, in some aspects, UE 120-2 (i.e., the transmitter UE) may determine that UE 120-2 continues broadband transmission after a PSFCH instance and may signal to UE 120-1 (i.e., the receiver UE) the feedback information (e.g., ACK / NACK) to be transmitted via broadband PSFCH. In some aspects, UE 120-2 may resume transmission of sidelink communications after a PSFCH instance (e.g., after transmitting sidelink communications and receiving broadband sidelink feedback communications, as described below). It is noted that from the perspective of UE 120-2, as long as appropriate gap control is used to schedule broadband PSFCH, UE 120-2 may resume broadband COT transmission regardless of whether UE 120-1 actually transmits broadband PSFCH.

[0147] Alternatively, UE 120-2 may send an indication that UE 120-1 will send narrowband sidelink feedback communication associated with sidelink communication, and UE 120-1 may receive the indication. For example, UE 120-2 may determine that UE 120-2 will not resume sending of sidelink communication after a PSFCH instance, and may send (e.g., together with or separately from a configuration) an indication that UE 120-1 will send narrowband sidelink feedback communication associated with sidelink communication. Thus, in some aspects, UE 120-2 (i.e., the transmitter UE) may determine that UE 120-2 does not need to continue with broadband transmission after a PSFCH instance, and may signal to UE 120-1 (i.e., the receiver UE) the feedback information (e.g., ACK / NACK) to be sent via narrowband PSFCH.

[0148] As shown by reference numeral 1104, UE 120-2 may send sidelink communication to a first UE after a transmission configuration, and UE 120-1 may receive the sidelink communication. For example, UE 120-2 may send PSSCH communication in PSSCH resources corresponding to one or more PSSCH interlaces of one or more RB sets, and UE 120-1 may receive the PSSCH communication in the PSSCH resources.

[0149] As shown by reference numeral 1106, in some aspects, UE 120-1 may send sidelink feedback communication after sending sidelink communication, and UE 120-2 may receive the sidelink feedback communication after sending sidelink communication. For example, UE 120-1 may receive a configuration as described above (e.g., including an indication that UE 120-1 will send broadband sidelink feedback communication) and sidelink communication. Here, UE 120-1 may send broadband sidelink feedback communication (e.g., broadband PSFCH) according to the configuration. For example, UE 120-1 may perform LBT according to the configuration (e.g., all-or-nothing LBT or independent broadband LBT) and may accordingly send broadband PSFCH (e.g., at least in part based on a set of broadband PSFCH parameters included in the configuration). As another example, UE 120-1 may send narrowband sidelink feedback communication (e.g., as described above, at least in part based on an indication received from UE 120-2).

[0150] As indicated above, Figure 11 is provided as an example. Other examples may be different from the examples Figure 11 described.

[0151] Figure 12FIG. is an illustration of an example process 1200 performed by a UE, such as according to the present disclosure. Example process 1200 is an example of a UE (e.g., UE 120) performing operations associated with a SL-U wideband PSFCH for enhanced capabilities PF0 or PF2.

[0152] As Figure 12 shown, in some aspects, process 1200 may include receiving a plurality of RB set specific configurations, each RB set specific configuration corresponding to a respective RB set among a plurality of RB sets in a shared frequency band, wherein each RB set specific configuration among the plurality of RB set specific configurations indicates at least one of a first set of PSFCH resources having a first format or a second set of PSFCH resources having a second format different from the first format (block 1210). For example, a UE (e.g., using Figure 15 the communication manager 140 and / or the receiving component 1502 depicted in ) may receive a plurality of RB set specific configurations, each RB set specific configuration corresponding to a respective RB set among a plurality of RB sets in a shared frequency band, wherein each RB set specific configuration among the plurality of RB set specific configurations indicates at least one of a first set of PSFCH resources having a first format or a second set of PSFCH resources having a second format different from the first format, as described above.

[0153] As Figure 12 further shown, in some aspects, process 1200 may include receiving sidelink communication in at least a first interleaving of an RB set included in the plurality of RB sets (block 1220). For example, a UE (e.g., using Figure 15 the communication manager 140 and / or the receiving component 1502 depicted in ) may receive sidelink communication in at least a first interleaving of an RB set included in the plurality of RB sets, as described above.

[0154] As Figure 12 further shown, in some aspects, process 1200 may include transmitting sidelink feedback communication associated with the sidelink communication in at least a second interleaving of the RB set, wherein the sidelink feedback communication is transmitted at least in part based on the RB set specific configuration associated with the RB set (block 1230). For example, a UE (e.g., using Figure 15 the communication manager 140 and / or the transmitting component 1504 depicted in ) may transmit sidelink feedback communication associated with the sidelink communication in at least a second interleaving of the RB set, wherein the sidelink feedback communication is transmitted at least in part based on the RB set specific configuration associated with the RB set, as described above. In some aspects, the sidelink feedback communication is transmitted at least in part based on the RB set specific configuration associated with the RB set.

[0155] Procedure 1200 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in connection with one or more other procedures described elsewhere herein.

[0156] In a first aspect, a plurality of RB set specific configurations include a first RB set specific configuration and a second RB set specific configuration different from the first RB set specific configuration.

[0157] In a second aspect, either alone or in combination with the first aspect, the plurality of RB set specific configurations include at least one RB set specific configuration that indicates a set of PSFCH resources having a single format.

[0158] In a third aspect, either alone or in combination with one or more of the first and second aspects, the first format or the second format is PF0.

[0159] In a fourth aspect, either alone or in combination with one or more of the first to third aspects, the first format or the second format is PF2.

[0160] Although Figure 12 example boxes of procedure 1200 are shown, in some aspects, procedure 1200 may include additional boxes, fewer boxes, different boxes, or boxes arranged in a different manner compared to those depicted. Additionally or alternatively, two or more boxes of procedure 1200 may be executed in parallel. Figure 12

[0161] Figure 13 is a diagram illustrating an example procedure 1300, such as may be performed by a UE, in accordance with the present disclosure. Example procedure 1300 is an example of operations performed by a UE (e.g., UE 120) related to LS-U wideband PSFCH for enhanced capabilities for PF0 or PF2.

[0162] As Figure 13 shown, in some aspects, procedure 1300 may include receiving sidelink communication in a first plurality of interlaces of a plurality of RB sets in a shared band (block 1310). For example, a UE (e.g., using Figure 15 the depicted communication manager 140 and / or receiving component 1502) may receive sidelink communication in a first plurality of interlaces of a plurality of RB sets in a shared band, as described above.

[0163] As Figure 13 further shown, in some aspects, procedure 1300 may include transmitting wideband sidelink feedback communication associated with the sidelink communication in a second plurality of interlaces of the plurality of RB sets, the wideband sidelink feedback communication being transmitted in at least a first group of PSFCH resources having a first format (block 1320). For example, a UE (e.g., using​Figure 15 The communication manager 140 and / or the transmitting component 1504 depicted in Figure 15 may transmit broadband sidelink feedback communication associated with sidelink communication in a second plurality of interlaces of a plurality of RB sets. The broadband sidelink feedback communication is transmitted in at least a first set of PSFCH resources having a first format, as described above.

[0164] Procedure 1300 may include additional aspects, such as any individual aspect or any combination of aspects described below and / or in conjunction with one or more other procedures described elsewhere herein.

[0165] In a first aspect, the first format is PF2.

[0166] In a second aspect, individually or in combination with the first aspect, each RB set in the plurality of RB sets utilizes the same RB set configuration for the PSFCH resources.

[0167] In a third aspect, individually or in combination with one or more of the first and second aspects, the broadband sidelink feedback communication is transmitted such that the waveform associated with the first format spans a plurality of RB sets.

[0168] In a fourth aspect, individually or in combination with one or more of the first to third aspects, the broadband sidelink feedback communication is transmitted such that the DMRS spans a plurality of RB sets.

[0169] In a fifth aspect, individually or in combination with one or more of the first to fourth aspects, the payload of the broadband sidelink feedback communication matches the RB rate in the second plurality of interlaces or the RB sets in the plurality of RB sets.

[0170] In a sixth aspect, individually or in combination with one or more of the first to fifth aspects, the broadband sidelink feedback communication is transmitted such that the waveform associated with the first format is repeated in each RB set in the plurality of RB sets.

[0171] In a seventh aspect, individually or in combination with one or more of the first to sixth aspects, the frequency division orthogonal cover code (FD-OCC) sequence is randomized across a plurality of RB sets.

[0172] In an eighth aspect, individually or in combination with one or more of the first to seventh aspects, the broadband sidelink feedback communication is transmitted such that feedback information is carried in at least one RB set in the plurality of RB sets, and a COT hold signal is carried in at least one other RB set in the plurality of RB sets.

[0173] In a ninth aspect, either alone or in combination with one or more of the first to eighth aspects, the broadband sidelink feedback communication is sent in a first set of RBs among a plurality of sets of RBs according to a first format and in a common interleaving within a set of reserved CS RBs or in a second set of RBs among the plurality of sets of RBs according to a second format.

[0174] In a tenth aspect, either alone or in combination with one or more of the first to ninth aspects, the broadband sidelink feedback communication is sent such that feedback information is carried in a first set of RBs and a COT hold signal is carried in a second set of RBs.

[0175] In an eleventh aspect, either alone or in combination with one or more of the first to tenth aspects, the RB set configuration for PSFCH resources varies among the RB sets in the plurality of sets of RBs.

[0176] In a twelfth aspect, either alone or in combination with one or more of the first to eleventh aspects, the broadband sidelink feedback communication is sent in one or more of the sets of RBs among the plurality of sets of RBs according to a first format, wherein the PSFCH resources corresponding to the interleaving in a second plurality of interleaveings are configured for the first format.

[0177] In a thirteenth aspect, either alone or in combination with one or more of the first to twelfth aspects, the broadband sidelink feedback communication is sent in a set of reserved CS RBs or in a common interleaving within at least one of the sets of RBs among the plurality of sets of RBs according to a second format, wherein the PSFCH resources corresponding to the interleaving are configured for the second format.

[0178] In a fourteenth aspect, either alone or in combination with one or more of the first to thirteenth aspects, a COT hold signal is carried in a set of reserved CS RBs or in a common interleaving within at least one of the sets of RBs, wherein the PSFCH resources corresponding to the interleaving are configured for the second format.

[0179] In a fifteenth aspect, either alone or in combination with one or more of the first to fourteenth aspects, the first format is PF0.

[0180] In a sixteenth aspect, either alone or in combination with one or more of the first to fifteenth aspects, the broadband sidelink feedback communication is sent such that a repetition of the RBs carrying feedback information is carried in each of the sets of RBs among the plurality of sets of RBs.

[0181] In a seventeenth aspect, either alone or in combination with one or more of the first to sixteenth aspects, the broadband sidelink feedback communication is sent such that a repetition of the common interleaving is carried in at least one of the sets of RBs among the plurality of sets of RBs.

[0182] In an eighteenth aspect, alone or in combination with one or more of the first to seventeenth aspects, send a broadband sidelink feedback communication such that a repetition of a set of reserved CS RBs is carried in at least one RB set among a plurality of RB sets.

[0183] In a nineteenth aspect, alone or in combination with one or more of the first to eighteenth aspects, send a broadband sidelink feedback communication such that a repetition of RBs carrying feedback information is carried in at least one RB set among a plurality of RB sets, and such that a repetition of a common interleaving is carried in other RB sets among the plurality of RB sets.

[0184] In a twentieth aspect, alone or in combination with one or more of the first to nineteenth aspects, send a broadband sidelink feedback communication such that a repetition of RBs carrying feedback information is carried in at least one RB set among a plurality of RB sets, and such that a repetition of a set of reserved CS RBs is carried in other RB sets among the plurality of RB sets.

[0185] Although Figure 13 example blocks of process 1300 are shown, in some aspects, process 1300 may include additional blocks, fewer blocks, different blocks, or blocks arranged in a different manner compared to those depicted. Additionally or alternatively, two or more blocks of process 1300 may be executed in parallel. Figure 13

[0186] Figure 14 FIG. is an illustration of an example process 1400 that may be performed by a UE, such as the UE 120, in accordance with the present disclosure. The example process 1400 is an example of operations associated with the LS-U broadband PSFCH for a UE (e.g., UE 120) to perform for enhanced capabilities of PF0 or PF2.

[0187] Figure 14 As Figure 15 shown, in some aspects, process 1400 may include sending a configuration indicating a set of broadband PSFCH parameters or a set of broadband LBT parameters to a second UE (block 1410). For example, the UE (e.g., using the communication manager 140 and / or the sending component 1504 depicted in Figure 15 ) may send a configuration indicating a set of broadband PSFCH parameters or a set of broadband LBT parameters to the second UE, as described above.

[0188] As Figure 14 further shown, in some aspects, process 1400 may include sending a sidelink communication to the second UE after sending the configuration (block 1420). For example, the UE (e.g., using the communication manager 140 and / or the sending component 1504 depicted in Figure 15 ) may send a sidelink communication to the second UE after sending the configuration, as described above.

[0189] Procedure 1400 may include additional aspects, such as any individual aspect or any combination of aspects described below and / or in combination with one or more other procedures described elsewhere herein.

[0190] In a first aspect, procedure 1400 includes receiving, after transmitting a sidelink communication, a broadband sidelink feedback communication from a second UE.

[0191] In a second aspect, alone or in combination with the first aspect, procedure 1400 includes transmitting an indication that the second UE will transmit a broadband sidelink feedback communication associated with the sidelink communication, at least in part based on determining that the UE will resume transmission of the sidelink communication after a PSFCH instance.

[0192] In a third aspect, alone or in combination with one or more of the first and second aspects, procedure 1400 includes resuming transmission of the sidelink communication after a PSFCH instance.

[0193] In a fourth aspect, alone or in combination with one or more of the first to third aspects, procedure 1400 includes transmitting an indication that the second UE will transmit a narrowband sidelink feedback communication associated with the sidelink communication, at least in part based on determining that the UE does not resume transmission of the sidelink communication after a PSFCH instance.

[0194] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, the set of PSFCH parameters indicates one or more RB sets in which the second UE will transmit a broadband sidelink feedback communication associated with the sidelink communication.

[0195] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the set of LBT parameters indicates the type of LBT to be performed by the second UE before transmitting a broadband sidelink feedback communication associated with the sidelink communication.

[0196] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, the set of PSFCH parameters indicates CPE parameters that will be used by the second UE in association with transmitting a broadband sidelink feedback communication associated with the sidelink communication.

[0197] Although Figure 14 example blocks of procedure 1400 are shown, in some aspects, procedure 1400 may include additional blocks, fewer blocks, different blocks, or blocks arranged in a different manner than those depicted. Additionally or alternatively, two or more of the blocks of procedure 1400 may be performed in parallel. Figure 14

[0198] ​Figure 15 FIG. Figure 15 is a diagram of an example apparatus 1500 for wireless communication in accordance with the present disclosure. The apparatus 1500 may be a UE, or the UE may include the apparatus 1500. In some aspects, the apparatus 1500 includes a receiving component 1502 and a transmitting component 1504, which may communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, the apparatus 1500 may communicate with another apparatus 1506 (such as a UE, a base station, or another wireless communication device) using the receiving component 1502 and the transmitting component 1504. As further shown, the apparatus 1500 may include a communication manager 140.

[0199] In some aspects, the apparatus 1500 may be configured to perform one or more operations described herein in connection with Figures 9A to 11 Additional or alternative, the apparatus 1500 may be configured to perform one or more processes described herein, such as Figure 12 process 1200 of Figure 13 process 1300 of Figure 14 process 1400 of Figure 15 or a combination thereof. In some aspects, Figure 2 the apparatus 1500 and / or one or more components shown may include one or more components of the UE described in connection with Figure 15 Additional or alternative, Figure 2 one or more components shown may be implemented within one or more components described in connection with

[0200] The receiving component 1502 may receive communications from the apparatus 1506, such as reference signals, control information, data communications, or a combination thereof. The receiving component 1502 may provide the received communications to one or more other components of the apparatus 1500. In some aspects, the receiving component 1502 may perform signal processing on the received communications (such as filtering, amplifying, demodulating, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalizing, interference cancellation, or decoding, etc.), and may provide the processed signals to the one or more other components of the apparatus 1500. In some aspects, the receiving component 1502 may include one or more antennas, modems, demodulators, MIMO detectors, receiving processors, controllers / processors, memories, or a combination thereof of the UE described in connection with Figure 2

[0201] The transmitting component 1504 may send communications, such as reference signals, control information, data communications, or combinations thereof, to the device 1506. In some aspects, one or more other components of the device 1500 may generate communications and may provide the generated communications to the transmitting component 1504 for transmission to the device 1506. In some aspects, the transmitting component 1504 may perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or coding, etc.) on the generated communications, and may send the processed signals to the device 1506. In some aspects, the transmitting component 1504 may include one or more antennas, a modem, a modulator, a transmitting MIMO processor, a transmitting processor, a controller / processor, a memory, or combinations thereof of the UE described in conjunction with Figure 2 In some aspects, the transmitting component 1504 may be co-located with the receiving component 1502 in a transceiver.

[0202] In some aspects, the receiving component 1502 may receive a plurality of RB set-specific configurations, each RB set-specific configuration corresponding to a respective RB set among a plurality of RB sets in a shared frequency band, where each RB set-specific configuration among the plurality of RB set-specific configurations indicates at least one of a first set of PSFCH resources having a first format or a second set of PSFCH resources having a second format different from the first format. In some aspects, the receiving component 1502 may receive sidelink communications in at least a first interleaving of the RB sets included in the plurality of RB sets. In some aspects, the transmitting component 1504 may send a sidelink feedback communication associated with the sidelink communication in at least a second interleaving of the RB sets, where the sidelink feedback communication is sent at least partially based on the RB set-specific configuration associated with the RB set.

[0203] In some aspects, the receiving component 1502 may receive sidelink communications in a first plurality of interleavings of a plurality of RB sets in a shared frequency band. In some aspects, the transmitting component 1504 may send a broadband sidelink feedback communication associated with the sidelink communication in a second plurality of interleavings of the plurality of RB sets, where the broadband sidelink feedback communication is sent in at least a first set of PSFCH resources having a first format.

[0204] In some aspects, the transmitting component 1504 may send a configuration indicating a set of broadband PSFCH parameters or a set of broadband LBT parameters to a second UE. After sending the configuration, the transmitting component 1504 may send sidelink communication to the second UE. In some aspects, the receiving component 1502 may receive broadband sidelink feedback communication from the second UE after the sidelink communication is sent. In some aspects, the transmitting component 1504 may send an indication that the second UE will send broadband sidelink feedback communication associated with the sidelink communication, at least partially based on determining that the first UE will resume sending sidelink communication after a PSFCH instance. In some aspects, the transmitting component 1504 may resume sending sidelink communication after a PSFCH instance. In some aspects, the transmitting component 1504 may send an indication that the second UE will send narrowband sidelink feedback communication associated with the sidelink communication, at least partially based on determining that the first UE will not resume sending sidelink communication after a PSFCH instance.

[0205] Figure 15 The number and arrangement of the components shown are provided as an example. In an implementation, there may be additional components, fewer components, different components, or components arranged in a different manner compared to those shown. Additionally, Figure 15 two or more of the components shown may be implemented within a single component, or Figure 15 a single component shown may be implemented as multiple distributed components. Additionally or alternatively, Figure 15 a set of the (one or more) components shown may perform one or more functions described as being performed by another set of components shown. Figure 15 Figure 15

[0206]

[0207] An overview of some aspects of the present disclosure is provided below:

[0208] Aspect 1: A method of wireless communication performed by a UE, the method comprising: receiving a plurality of RB set-specific configurations, each RB set-specific configuration corresponding to a respective RB set among a plurality of RB sets in a shared frequency band, wherein each RB set-specific configuration of the plurality of RB set-specific configurations indicates at least one of a first set of PSFCH resources having a first format or a second set of PSFCH resources having a second format different from the first format; receiving sidelink communication in at least a first interleaving of the RB sets included in the plurality of RB sets; and sending sidelink feedback communication associated with the sidelink communication in at least a second interleaving of the RB sets, wherein the sidelink feedback communication is sent at least partially based on the RB set-specific configuration associated with the RB set.

[0208] Aspect 2: The method according to Aspect 1, wherein the plurality of RB set specific configurations include a first RB set specific configuration and a second RB set specific configuration different from the first RB set specific configuration.

[0209] Aspect 3: The method according to any one of Aspects 1 to 2, wherein the plurality of RB set specific configurations include at least one RB set specific configuration, and the at least one RB set specific configuration indicates a set of PSFCH resources having a single format.

[0210] Aspect 4: The method according to any one of Aspects 1 to 3, wherein the first format or the second format is PF0.

[0211] Aspect 5: The method according to any one of Aspects 1 to 4, wherein the first format or the second format is PF2.

[0212] Aspect 6: A method for wireless communication performed by a UE, the method comprising: receiving sidelink communication in a first plurality of interlaces of a plurality of RB sets in a shared frequency band; and transmitting broadband sidelink feedback communication associated with the sidelink communication in a second plurality of interlaces of the plurality of RB sets, the broadband sidelink feedback communication being transmitted in at least a first set of PSFCH resources having a first format.

[0213] Aspect 7: The method according to Aspect 6, wherein the first format is PF2.

[0214] Aspect 8: The method according to any one of Aspects 6 to 7, wherein each RB set in the plurality of RB sets utilizes the same RB set configuration for PSFCH resources.

[0215] Aspect 9: The method according to any one of Aspects 6 to 8, wherein the broadband sidelink feedback communication is transmitted such that the waveform associated with the first format spans the plurality of RB sets.

[0216] Aspect 10: The method according to Aspect 9, wherein the broadband sidelink feedback communication is transmitted such that DMRS spans the plurality of RB sets.

[0217] Aspect 11: The method according to Aspect 9, wherein the payload of the broadband sidelink feedback communication matches the RB rate in the second plurality of interlaces or the plurality of RB sets.

[0218] Aspect 12: The method according to any one of Aspects 6 to 11, wherein the broadband sidelink feedback communication is transmitted such that the waveform associated with the first format is repeated in each RB set of the plurality of RB sets.

[0219] Aspect 13: The method according to aspect 12, wherein the frequency division orthogonal cover code (FD-OCC) sequences are randomized across the plurality of RB sets.

[0220] Aspect 14: The method according to any one of aspects 6 to 13, wherein the broadband sidelink feedback communication is sent such that feedback information is carried in at least one of the plurality of RB sets, and a COT hold signal is carried in at least one other of the plurality of RB sets.

[0221] Aspect 15: The method according to any one of aspects 6 to 14, wherein the broadband sidelink feedback communication is sent in a first RB set of the plurality of RB sets according to the first format and in a common interleaving within a set of reserved CS RBs or in a second RB set of the plurality of RB sets according to a second format.

[0222] Aspect 16: The method according to aspect 15, wherein the broadband sidelink feedback communication is sent such that feedback information is carried in the first RB set and a COT hold signal is carried in the second RB set.

[0223] Aspect 17: The method according to any one of aspects 6 to 16, wherein the RB set configuration for the PSFCH resource varies among the RB sets of the plurality of RB sets.

[0224] Aspect 18: The method according to any one of aspects 6 to 17, wherein the broadband sidelink feedback communication is sent in one or more of the plurality of RB sets according to the first format, wherein the PSFCH resources corresponding to the interleaving in the second plurality of interleavings are configured for the first format.

[0225] Aspect 19: The method according to aspect 18, wherein the broadband sidelink feedback communication is sent in a set of reserved CS RBs or in a common interleaving within at least one of the plurality of RB sets according to a second format, wherein the PSFCH resources corresponding to the interleaving are configured for the second format.

[0226] Aspect 20: The method according to aspect 19, wherein a COT hold signal is carried in the set of reserved CS RBs or in the common interleaving in the at least one RB set, wherein the PSFCH resources corresponding to the interleaving are configured for the second format.

[0227] Aspect 21: The method according to any one of aspects 6 to 20, wherein the first format is PF0.

[0228] Aspect 22: The method according to any one of Aspects 6 to 21, wherein the broadband sidelink feedback communication is sent such that there is a repetition of RBs carrying feedback information in each of the plurality of RB sets.

[0229] Aspect 23: The method according to Aspect 22, wherein the broadband sidelink feedback communication is sent such that there is a repetition of a common interleaving in at least one of the plurality of RB sets.

[0230] Aspect 24: The method according to Aspect 22, wherein the broadband sidelink feedback communication is sent such that there is a repetition of a set of reserved CS RBs in at least one of the plurality of RB sets.

[0231] Aspect 25: The method according to Aspect 22, wherein the broadband sidelink feedback communication is sent such that there is a repetition of RBs carrying feedback information in at least one of the plurality of RB sets, and such that there is a repetition of a common interleaving in other RB sets of the plurality of RB sets.

[0232] Aspect 26: The method according to Aspect 22, wherein the broadband sidelink feedback communication is sent such that there is a repetition of RBs carrying feedback information in at least one of the plurality of RB sets, and such that there is a repetition of a set of reserved CS RBs in other RB sets of the plurality of RB sets.

[0233] Aspect 27: A method of wireless communication performed by a first UE, the method comprising: sending a configuration indicating a set of broadband PSFCH parameters or a set of broadband LBT parameters to a second UE; and after sending the configuration, sending sidelink communication to the second UE.

[0234] Aspect 28: The method according to Aspect 27, the method further comprising: after sending the sidelink communication, receiving broadband sidelink feedback communication from the second UE.

[0235] Aspect 29: The method according to any one of Aspects 27 to 28, the method further comprising: sending an indication that the second UE will send broadband sidelink feedback communication associated with the sidelink communication, at least in part based on determining that the first UE will resume sending of the sidelink communication after a PSFCH instance.

[0236] Aspect 30: The method according to Aspect 29, the method further comprising: after the PSFCH instance, resuming the sending of the sidelink communication.

[0237] Aspect 31: The method according to any one of aspects 27 to 30, the method further comprising: sending an indication that the second UE will send narrowband sidelink feedback communication associated with the sidelink communication, at least in part based on determining that the first UE does not resume transmission of the sidelink communication after a PSFCH instance.

[0238] Aspect 32: The method according to any one of aspects 27 to 31, wherein the set of PSFCH parameters indicates one or more RB sets, wherein the second UE will send broadband sidelink feedback communication associated with the sidelink communication.

[0239] Aspect 33: The method according to any one of aspects 27 to 32, wherein the set of LBT parameters indicates the type of LBT to be performed by the second UE before sending broadband sidelink feedback communication associated with the sidelink communication.

[0240] Aspect 34: The method according to any one of aspects 27 to 33, wherein the set of PSFCH parameters indicates cyclic prefix extension (CPE) parameters, and the cyclic prefix extension (CPE) parameters will be used by the second UE in association with sending broadband sidelink feedback communication associated with the sidelink communication.

[0241] Aspect 35: An apparatus for wireless communication at a device, the apparatus comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method according to one or more of aspects 1 to 34.

[0242] Aspect 36: A device for wireless communication, the device comprising: a memory and one or more processors coupled to the memory, the one or more processors configured to perform the method according to one or more of aspects 1 to 34.

[0243] Aspect 37: An apparatus for wireless communication, the apparatus comprising at least one component for performing the method according to one or more of aspects 1 to 34.

[0244] Aspect 38: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method according to one or more of aspects 1 to 34.

[0245] Aspect 39: A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set including one or more instructions that, when executed by one or more processors of a device, cause the device to perform the methods according to one or more of Aspects 1 to 34.

[0246] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit aspects to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure, or may be obtained from practice of the aspects.

[0247] Further disclosure is included in the appendix. This appendix is provided only as an example and is considered to be part of this specification. Definitions, illustrations, or other descriptions in the appendix do not replace or supersede similar information included in the detailed description or the figures. Additionally, definitions, illustrations, or other descriptions in the detailed description or the figures do not replace or supersede similar information included in the appendix. Further, this appendix is not intended to limit the disclosure of possible aspects.

[0248] As used herein, the term "component" is intended to be broadly construed as hardware and / or a combination of hardware and software. Whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise, "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, etc. As used herein, a "processor" is implemented in hardware and / or a combination of hardware and software. It will be apparent that the systems and / or methods described herein may be implemented by different forms of hardware and / or combinations of hardware and software. The actual specific control hardware or software code used to implement these systems and / or methods does not limit the aspects. Accordingly, the operation and behavior of the systems and / or methods are not described herein with reference to specific software code, as those skilled in the art will understand that the software and hardware may be designed at least in part based on the description herein to implement the systems and / or methods.

[0249] As used herein, depending on the context, "meeting a threshold" may refer to a value being greater than a threshold, greater than or equal to a threshold, less than a threshold, less than or equal to a threshold, equal to a threshold, not equal to a threshold, etc.

[0250] Although specific combinations of features are recited in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of each aspect. Many of these features may be combined in ways not specifically recited in the claims and / or not disclosed in the specification. The disclosure of each aspect includes each dependent claim in combination with every other claim in the set of claims. As used herein, the phrase referring to a list of items “at least one of” refers to any combination of those items (which includes a single member). By way of example, “at least one of a, b, or c” is intended to cover a, b, c, a+b, a+c, b+c, and a+b+c, as well as any combination with multiple identical elements (e.g., a+a, a+a+a, a+a+b, a+a+c, a+b+b, a+c+c, b+b, b+b+b, b+b+c, c+c, and c+c+c, or any other ordering of a, b, and c).

[0251] Any element, act, or instruction used herein should not be construed as critical or essential unless explicitly so described. Additionally, as used herein, the article “a” is intended to include one or more items and may be used interchangeably with “one or more.” Further, as used herein, the article “the” is intended to include the one or more items referred to in connection with the article “the” and may be used interchangeably with “one or more.” Additionally, as used herein, the terms “set” and “group” are intended to include one or more items and may be used interchangeably with “one or more.” If only intending to refer to a single item, the phrase “only one” or similar language will be used. Additionally, as used herein, the terms “has,” “owns,” “possesses,” etc. are intended to be open-ended terms that do not limit the elements they modify (e.g., an element that “has” A may also have B). Further, the phrase “based on” is intended to mean “at least partially based on” unless otherwise explicitly stated. Additionally, as used herein, the term “or” when used in a series is intended to be open-ended and may be used interchangeably with “and / or” unless otherwise explicitly stated (e.g., if used in conjunction with “either” or “only one”).

Claims

1. An apparatus for wireless communication at a user equipment (UE), the apparatus comprises: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: receive a plurality of resource block (RB) set specific configurations, each RB set specific configuration corresponding to a respective RB set among a plurality of RB sets in a shared frequency band, wherein each RB set specific configuration among the plurality of RB set specific configurations indicates at least one of a first set of physical sidelink feedback channel (PSFCH) resources having a first format or a second set of PSFCH resources having a second format different from the first format; receive sidelink communication in at least a first interleaving of an RB set included in the plurality of RB sets; and transmit sidelink feedback communication associated with the sidelink communication in at least a second interleaving of the RB set, wherein the sidelink feedback communication is transmitted at least in part based on the RB set specific configuration associated with the RB set.

2. The apparatus according to claim 1, wherein the plurality of RB set specific configurations includes a first RB set specific configuration and a second RB set specific configuration different from the first RB set specific configuration.

3. The apparatus according to claim 1, wherein the plurality of RB set specific configurations includes at least one RB set specific configuration that indicates a set of PSFCH resources having a single format.

4. The apparatus according to claim 1, wherein the first format is PSFCH format 0 (PF0), and the second format is PSFCH format 2 (PF0).

5. An apparatus for wireless communication at a user equipment (UE), the apparatus comprises: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: receive sidelink communication in a first plurality of interleavings of a plurality of resource blocks (RB) sets in a shared frequency band; and transmit wideband sidelink feedback communication associated with the sidelink communication in a second plurality of interleavings of the plurality of RB sets, wherein the wideband sidelink feedback communication is transmitted in at least a first set of physical sidelink feedback channel (PSFCH) resources having a first format.

6. The apparatus according to claim 5, wherein the first format is PSFCH format 2 (PF2).

7. The apparatus according to claim 5, wherein each RB set among the plurality of RB sets utilizes the same RB set configuration for PSFCH resources.

8. The apparatus according to claim 5, wherein the wideband sidelink feedback communication is transmitted such that the waveform associated with the first format spans the plurality of RB sets.

9. The apparatus according to claim 8, wherein the wideband sidelink feedback communication is transmitted such that the demodulation reference signal (DMRS) spans the plurality of RB sets.

10. The apparatus according to claim 8, wherein the payload of the broadband sidelink feedback communication is rate-matched to the second plurality of interleavings or the RBs in the plurality of RB sets.

11. The apparatus according to claim 5, wherein the broadband sidelink feedback communication is transmitted such that the waveform associated with the first format is repeated in each of the plurality of RB sets.

12. The apparatus according to claim 11, wherein the frequency division orthogonal cover code (FD-OCC) sequence is randomized across the plurality of RB sets.

13. The apparatus according to claim 5, wherein the broadband sidelink feedback communication is transmitted such that feedback information is carried in at least one of the plurality of RB sets and a channel occupancy time (COT) hold signal is carried in at least one other of the plurality of RB sets.

14. The apparatus according to claim 5, wherein the broadband sidelink feedback communication is transmitted according to the first format in a first RB set of the plurality of RB sets and according to a second format in a set of reserved cyclic shift (CS) RBs or in a common interleaving within a second RB set of the plurality of RB sets.

15. The apparatus according to claim 14, wherein the broadband sidelink feedback communication is transmitted such that feedback information is carried in the first RB set and a channel occupancy time (COT) hold signal is carried in the second RB set.

16. The apparatus according to claim 5, wherein the RB set configured for the PSFCH resource varies among the RB sets of the plurality of RB sets.

17. The apparatus according to claim 5, wherein the broadband sidelink feedback communication is transmitted according to the first format in one or more RB sets of the plurality of RB sets, wherein the PSFCH resources corresponding to the interleavings in the second plurality of interleavings are configured for the first format.

18. The apparatus according to claim 17, wherein the broadband sidelink feedback communication is transmitted according to a second format in a set of reserved cyclic shift (CS) RBs or in a common interleaving within at least one RB set of the plurality of RB sets, wherein the PSFCH resources corresponding to the interleavings are configured for the second format.

19. The apparatus according to claim 18, wherein a channel occupancy time (COT) hold signal is carried in the set of reserved CS RBs or in the common interleaving in the at least one RB set, wherein the PSFCH resources corresponding to the interleavings are configured for the second format.

20. The apparatus according to claim 5, wherein the first format is the PSFCH format 0 (PF0).

21. The apparatus according to claim 5, wherein the broadband sidelink feedback communication is transmitted such that a repetition of the RBs carrying feedback information is carried in each of the plurality of RB sets.

22. The apparatus according to claim 21, wherein the broadband sidelink feedback communication is transmitted such that at least one of the following is achieved: Carry repetitions of a common interleaving in at least one of the plurality of RB sets; or Carry repetitions of a set of reserved cyclic shift (CS) RBs in at least one of the plurality of RB sets.

23. The apparatus according to claim 21, wherein the wideband sidelink feedback communication is sent such that at least one of the following is achieved: Carry repetitions of RBs carrying feedback information in at least one of the plurality of RB sets, and carry repetitions of a common interleaving in other RB sets of the plurality of RB sets; or Carry repetitions of RBs carrying feedback information in at least one of the plurality of RB sets, and carry repetitions of a set of reserved cyclic shift (CS) RBs in other RB sets of the plurality of RB sets.

24. An apparatus for wireless communication at a first user equipment (UE), the apparatus comprises: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: send a configuration indicating a set of wideband physical sidelink feedback channel (PSFCH) parameters or a set of wideband listen-before-talk (LBT) parameters to a second UE; and after sending the configuration, send sidelink communication to the second UE.

25. The apparatus according to claim 24, wherein the instructions further cause the apparatus to receive wideband sidelink feedback communication from the second UE after sending the sidelink communication.

26. The apparatus according to claim 24, wherein the instructions further cause the apparatus to send an indication that the second UE will send wideband sidelink feedback communication associated with the sidelink communication, at least in part based on determining that the first UE will resume sending the sidelink communication after a PSFCH instance.

27. The apparatus according to claim 26, wherein the instructions further cause the apparatus to resume sending the sidelink communication after the PSFCH instance.

28. The apparatus according to claim 24, wherein the instructions further cause the apparatus to send an indication that the second UE will send narrowband sidelink feedback communication associated with the sidelink communication, at least in part based on determining that the first UE does not resume sending the sidelink communication after a PSFCH instance.

29. The apparatus according to claim 24, wherein the set of PSFCH parameters indicates at least one of the following: one or more resource block (RB) sets in which the second UE will send wideband sidelink feedback communication associated with the sidelink communication; or cyclic prefix extension (CPE) parameters that will be used by the second UE in association with sending wideband sidelink feedback communication associated with the sidelink communication.

30. The apparatus according to claim 24, wherein the set of LBT parameters indicates the type of LBT to be performed by the second UE before sending wideband sidelink feedback communication associated with the sidelink communication.

31. A method, apparatus, device, computer program product, non-transitory computer-readable medium, user equipment, base station, network node, wireless communication device, and / or processing system substantially as described herein with reference to the accompanying drawings, the specification, and the appendices and as illustrated by the accompanying drawings, the specification, and the appendices.

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