Sidelink channel occupancy time sharing

Abstract

This provides a method for user equipment devices (UEs) to control the reuse of channel occupancy time (COT) in sidelink communications. [Solution] In a wireless communication system, the UE controls the reuse of an initiated channel occupancy by initiating channel occupancy for sidelink transmission, generating COT shared information for the initiated channel occupancy including one or more additional identifiers and corresponding cast type indications, and allowing the responding UE to transmit during the initiated channel occupancy only when an identifier included in the responding UE's sidelink control information matches one of the additional identifiers, and the cast type indication of the matched additional identifier indicates a cast type different from the cast type of the sidelink transmission that initiated the channel occupancy.

Description

Technical Field

[0001] The present invention relates to wireless communication, and more particularly, to a device, system, and method for side-link unlicensed band (SL-U) cyclic prefix extension (CPE) start position and identifier (ID) restriction for channel time occupancy (COT) sharing in, for example, after the 5G NR system.

Background Art

[0002] The use of wireless communication systems has been increasing rapidly. In recent years, wireless devices such as smartphones and tablet computers have become increasingly high-performance. In addition to supporting telephone functions, many mobile devices now provide access to the Internet, email, text messaging, and navigation using the global positioning system (GPS), and can operate sophisticated applications that utilize those functionalities. Some examples of wireless communication standards include GSM, UMTS (associated with, for example, the WCDMA (registered trademark) or TD-SCDMA air interface), LTE, LTE Advanced (LTE-A), NR, HSPA, 3GPP2 CDMA2000 (for example, 1xRTT, 1xEV-DO, HRPD, eHRPD), IEEE802.11 (WLAN or Wi-Fi), BLUETOOTH (trademark), and the like.

[0003] The ever-increasing features and functionalities introduced into wireless communication devices also create a continuous need to improve both wireless communication and wireless communication devices. In particular, it is crucial to ensure the accuracy of transmitted and received signals via user equipment (UE) devices, such as cellular phones, base stations, and relay stations used in wireless cellular communications. In addition, increasing the functionality of UE devices can place a significant burden on their battery life. Therefore, it is also very important to reduce the power requirements of UE device designs while ensuring that UE devices maintain good transmit and receive capabilities to improve communication. Thus, improvements in this area are desirable. [Overview of the project]

[0004] The embodiments relate to wireless communication, and more particularly to devices, systems, and methods for restricting sidelink unauthorized bandwidth (SL-U) cyclic prefix extension (CPE) start position and identifier (ID) for channel time occupancy (COT) sharing in 5G NR systems and beyond.

[0005] For example, in some embodiments, a UE (e.g., the UE's baseband processor) may be configured to initiate channel access in the SL-U (e.g., the SL-U band and / or SL-U spectrum) via an NR downlink (DL) type A or NR DL type B multichannel access procedure to perform multiple physical sidelink feedback channel (PSFCH) transmissions on multiple channels. The UE may also be configured to secure a COT, and if the COT is initiated by a PSFCH type 1 channel access, it may not share the COT with other UEs, may share the COT with the corresponding UE, or may share the COT with any UE that expects feedback during the COT.

[0006] As another example, in some embodiments, the UE (e.g., the UE's baseband processor) may be configured to detect whether there is a reservation for a sidelink physical channel as part of initiating COT on the sidelink physical channel. The sidelink physical channel may include at least one of a physical sidelink control channel (PSCCH) or a physical sidelink shared channel (PSSCH). In addition, the UE may be configured to initiate full-bandwidth transmission on the sidelink physical channel and select multiple CPE initiation positions to avoid interference, depending on whether it detects that there is a reservation for the sidelink physical channel. Furthermore, the UE may be configured to initiate partial-bandwidth transmission on the sidelink physical channel based on one or more conditions and select a CPE initiation position based on one or more conditions, depending on whether it detects that there is a reservation for the sidelink physical channel.

[0007] As an additional example, in some embodiments, a UE (e.g., the UE's baseband processor) may be configured to receive information from the transmitting UE that initiated the COT. The information may be received on a shared RB set. In addition, the UE may be configured to transmit using resources within the shared RB set during the COT.

[0008] As a further example, in some embodiments, the UE (e.g., the UE's baseband processor) may be configured to initiate channel access in the SL-U spectrum. In addition, the UE may be configured to determine during COT whether the UE will have partial bandwidth for transmission or full bandwidth for transmission. Furthermore, the UE may be configured to select a channel access type based on this determination.

[0009] The techniques described herein may be implemented in and / or used in several different types of devices, including but not limited to, unmanned aerial vehicles (UAVs), unmanned aerial vehicle controllers (UACs), UTM servers, base stations, access points, cellular phones, tablet computers, wearable computing devices, portable media players, and various other computing devices.

[0010] This summary of the invention is intended to provide a brief overview of some of the subject matter described herein. Therefore, it should be understood that the features described above are merely examples and should not be construed as narrowing the scope or spirit of the subject matter described herein. Other features, aspects, and advantages of the subject matter described herein will become apparent from the following detailed description, drawings, and claims.

[0011] A better understanding of this subject can be obtained when the following detailed descriptions of various embodiments are considered together with the following drawings. [Brief explanation of the drawing]

[0012] [Figure 1] This figure shows an exemplary wireless communication system according to several embodiments.

[0013] [Figure 2] This is an exemplary block diagram of a base station according to several embodiments.

[0014] [Figure 3] An exemplary block diagram of a UE according to several embodiments is shown.

[0015] [Figure 4] A block diagram showing an exemplary modem or baseband processor according to several embodiments.

[0016] [Figure 5] Here is an example of excessive sharing of COT.

[0017] [Figure 6] A UE that provides feedback on both the inner and outer PSFCHs of the corresponding COT according to some embodiments is shown.

[0018] [Figure 7] An example of a UE that transmits within a shared RB set according to some embodiments is shown.

[0019] [Figure 8] An example of a default configuration of CCA according to some embodiments is shown.

[0020] [Figure 9] An example of a UE that transmits using all transmissions according to some embodiments is shown.

[0021] [Figure 10] An example of a UE that transmits using partial bandwidth transmission is shown.

[0022] [Figure 11] It is a block diagram of an example of a method for COT sharing for PSFCH according to some embodiments.

[0023] [Figure 12] It is a block diagram of an example of a method for selecting a CPE start position for sidelink physical channel transmission according to some embodiments.

[0024] [Figure 13] It is a block diagram of an example of a method for COT sharing for SL-U spectrum operation according to some embodiments.

[0025] [Figure 14] It is a block diagram of an example of a method for determining a channel access type of a COT for SL-U spectrum operation according to some embodiments.

[0026] While various modifications and alternative forms are possible for the features described herein, specific embodiments are shown in the drawings as examples and described in detail herein. However, it should be understood that the drawings and their detailed description are not intended to limit the invention to any particular form, but rather to encompass all modifications, equivalents, and alternatives within the spirit and scope of the subject matter as defined by the appended claims. [Modes for carrying out the invention]

[0027] acronym This disclosure uses a variety of acronyms throughout. The definitions of the most frequently used acronyms that may appear throughout this disclosure are as follows: ● 3GPP: Third Generation Partnership Project ●UE: User Equipment ●RF: Radio frequency ●BS: Base station ●DL: Downlink ●UL: Uphill Link ●LTE: Long-Term Evolution ●NR: New Wireless ● 5GS: 5G system ● 5GMM: 5GS Mobility Management ● 5GC / 5GCN: 5G Core Network ●SIM: Subscriber identification module ●eSIM: Embedded subscriber identification module ●IE: Information element ●CE: Control element ●MAC: Media Access Control ●SSB: Synchronization signal block ●PDCCH: Physical Downlink Control Channel ●PDSCH: Physical Downlink Shared Channel ●RRC: Wireless Resource Control term

[0028] The following is an explanation of the terms used in this disclosure.

[0029] Memory medium – any of the various types of non-temporary memory devices or storage devices. The term “memory medium” is intended to include, for example, installation media such as CD-ROMs, floppy disks, or tape devices; computer system memory or random access memory such as DRAM, DDR RAM, SRAM, EDO RAM, Rambus RAM; non-volatile memory such as flash, hard drives, or optical storage; registers, or other similar types of memory elements. The memory medium may also include other types of non-temporary memory, or combinations thereof. In addition, the memory medium may be located on a first computer system on which a program is executed, or on a second different computer system connected to the first computer system via a network such as the Internet. In the latter case, the second computer system can provide program instructions to the first computer for execution. The term “memory medium” may include two or more memory mediums that may exist in different locations, for example, on different computer systems connected via a network. The memory medium may store program instructions (embodied, for example, as computer programs) that can be executed by one or more processors.

[0030] Carrier medium - memory media as described above, as well as physical transmission media such as buses and networks, and / or other physical transmission media that transmit signals such as electrical signals, electromagnetic signals, or digital signals.

[0031] Programmable hardware elements include various hardware devices comprising multiple programmable function blocks connected via programmable interconnectors. Examples include field programmable gate arrays (FPGAs), programmable logic devices (PLDs), field programmable object arrays (FPOAs), and complex PLDs (CPLDs). Programmable function blocks can range in granularity from fine-grained (combinatorial logic or lookup tables) to coarse-grained (arithmetic logic units or processor cores). Programmable hardware elements may also be referred to as "reconfigurable logic."

[0032] User equipment (UE) (or “UE device”) – any of the various types of mobile or portable computer system devices that perform wireless communication. Examples of UE devices include mobile phones or smartphones (e.g., iPhone®, Android®-based phones), portable gaming devices (e.g., Nintendo DS®, PlayStation Portable®, Gameboy Advance®, iPhone®), laptops, wearable devices (e.g., smartwatches, smart glasses), PDAs, mobile internet devices, music players, data storage devices, other handheld devices, unmanned aerial vehicles (UAVs) (e.g., drones), and UAV controllers (UACs). Generally, the terms “UE” or “UE device” can be broadly defined to encompass any electronic device, computing device, and / or telecommunications device (or combination of devices) that is easily carried by a user and capable of wireless communication.

[0033] Base station - The term "base station" has the full scope of its ordinary meaning and includes at least a radio communication station that is installed in a fixed location and used for communication as part of a radiotelephone system or a radio system.

[0034] Processing element (or processor) refers to various elements or combinations of elements that are capable of performing functions in a device such as a user device or a cellular network device. Processing elements may include, for example, a processor and associated memory, a part or circuit of an individual processor core, an entire processor core, a processor array, circuits such as an Application Specific Integrated Circuit (ASIC), programmable hardware elements such as a field-programmable gate array (FPGA), and any of the various combinations of the above.

[0035] Channel - The medium used to transmit information from the transmitter to the receiver. It should be noted that the characteristics of the term "channel" can vary according to different radio protocols; therefore, when used herein, the term "channel" is considered to be used in accordance with the standards of the type of device in which it is used. In some standards, channel width can be variable (depending on, for example, device capabilities, bandwidth conditions, etc.). For example, LTE may support scalable channel bandwidths from 1.4 MHz to 20 MHz. In contrast, a WLAN channel may have a width of 22 MHz, and a Bluetooth channel may have a width of 1 MHz. Other protocols and standards may include different channel definitions. Furthermore, some standards may define and use multiple types of channels, e.g., different channels for uplink or downlink, and / or different channels for different uses such as data, control information, etc.

[0036] Bandwidth – The term “bandwidth” encompasses the entire range of the band in its usual sense, and includes at least the portion of the spectrum (e.g., the radio frequency spectrum) that is used for a particular purpose or set aside for the same purpose.

[0037] The term "Wi-Fi" (or WiFi) encompasses the full scope of its ordinary meaning and includes, at a minimum, wireless communication networks or RATs that are serviced by wireless LAN (WLAN) access points and provide connectivity to the Internet through these access points. Modern Wi-Fi networks (or WLAN networks) are based on the IEEE 802.11 standard and are marketed under the name "Wi-Fi". Wi-Fi (WLAN) networks are distinct from cellular networks.

[0038] 3GPP access refers to access (e.g., wireless access technology) specified by 3GPP standards. These accesses include, but are not limited to, GSM / GPRS, LTE, LTE-A, and / or 5G NR. In general, 3GPP access refers to various types of cellular access technologies.

[0039] Non-3GPP access refers to any access not defined by the 3GPP standard (e.g., wireless access technologies). These accesses include, but are not limited to, WiMAX, Wi-Fi, WLAN, and / or fixed networks. Non-3GPP access can be divided into two categories: "trusted" and "untrusted": trusted non-3GPP access can directly interact with the Evolutionary Packet Core (EPC) and / or 5G Core (5GC), while untrusted non-3GPP access interacts with the EPC / 5GC through network entities such as Evolutionary Packet Data Gateways and / or 5G NR Gateways. In general, non-3GPP access refers to various types of non-cellular access technologies.

[0040] Automatically refers to an action or operation performed by a computer system (e.g., software run by the computer system) or device (e.g., circuitry, programmable hardware element, ASIC, etc.) without user input directly specifying or executing the action or operation. Therefore, the term "automatically" is in contrast to an operation performed or specified manually by the user, where the user provides input to directly execute the operation. An automated procedure may be initiated by user-provided input, but the subsequent actions performed "automatically" are not specified by the user; that is, they are not performed "manually" where the user specifies each action to be performed. For example, a user filling out an electronic form by providing input to select each field and specify the information (e.g., by typing information, selecting checkboxes, selecting radio selections, etc.) is considered manually filling out the form, although the computer system must update the form in response to the user action. A form may also be automatically filled out by a computer system, where the computer system (e.g., software run by the computer system) analyzes the fields of the form and fills it out without user input specifying the answers to the fields. As described above, users can invoke form autofill but do not participate in the actual form completion (for example, the user does not manually specify answers in the fields; rather, the answers are completed automatically). This specification provides various examples of actions that are performed automatically in response to actions taken by the user.

[0041] "Approximately" refers to a value that is nearly accurate or precise. For example, "approximately" may refer to a value within 1 to 10 percent of a precise (or desired) value. However, it should be noted that the actual threshold (or tolerance) may depend on the application. For example, in some embodiments, "approximately" may mean within 0.1% of a given specified or desired value, while in various other embodiments, the threshold may be, as desired or as required by the particular application, for example, 2%, 3%, 5%, etc.

[0042] Concurrency refers to parallel execution (execution or performance) in which tasks, processes, or programs are executed at least partially on top of each other. For example, concurrent execution may be performed using "strong" or strict parallelism, where tasks are executed in parallel (at least partially) on each computational element, or it may be performed using "weak parallelism," where tasks are executed interleaved, for example, by time-sharing multiplexing of execution threads.

[0043] Various components may be described as "configured to" perform a task(s). In such contexts, "configured to" is a broad description that generally means "having a structure" that performs a task(s) or more tasks during operation. Thus, a component may be configured to perform a task even when it is not currently performing that task (for example, a set of conductors may be configured to electrically connect two modules to another even when the two modules are not connected). In some contexts, "configured to" may be a broad description of a structure that generally means "having a circuit" that performs a task(s) or more tasks during operation. Thus, a component may be configured to perform a task even when it is not currently turned on. Generally, the circuit that forms a structure corresponding to "configured to" may include hardware circuitry.

[0044] For convenience, various components may be described in this specification as performing one or more tasks. Such descriptions should be interpreted as including the phrase “configured to perform.” Descriptions of components configured to perform one or more tasks are expressly intended not to be subject to the interpretation of § 112(f) of the U.S. Patent Act. Figure 1: Communication System

[0045] Figure 1 shows a simplified, exemplary wireless communication system according to several embodiments. Note that the system in Figure 1 is merely an example of a possible system, and features of this disclosure may be implemented as desired in any of the various systems.

[0046] As shown in the figure, the exemplary wireless communication system includes one or more user devices 106A, 106B, and so on, up to 106N, and a base station 102A that communicates via a transmission medium. Each of the user devices may be referred to herein as a “user equipment” (UE). Thus, user device 106 is referred to as a UE or UE device.

[0047] Base station (BS) 102A may be a base transceiver station (BTS) or a cellular base station ("cellular base station"), and may include hardware that enables wireless communication with UE106A~106N.

[0048] The communication area (or coverage area) of a base station may be referred to as a “cell.” Base stations 102A and UE106 may be configured to communicate over a transmission medium using any of the various radio access technologies (RATs), also known as wireless communication technologies or telecommunications standards, such as LTE, LTE-Advanced (LTE-A), 5G New Radio (5G NR), and Wi-Fi. Note that when base station 102A is implemented in the context of LTE, it may be alternatively referred to as an “eNodeB” or eNB. Note that when base station 102A is implemented in the context of 5G NR, it may be alternatively referred to as a “gNodeB” or “gNB.”

[0049] As shown in the figure, the base station 102A may also be equipped to communicate with the network 100 (for example, among various possibilities, the core network of a cellular service provider, a telecommunications network such as the Public Switched Telephone Network (PSTN), and / or the Internet). Thus, the base station 102A can facilitate communication between user devices and / or between user devices and the network 100. In particular, the cellular base station 102A can provide the UE 106 with various telecommunications capabilities such as voice, SMS, and / or data services.

[0050] Base station 102A, and other similar base stations (such as base stations 102B-102N) operating according to the same or different cellular communication standards, may be provided as a network of cells, which can provide continuous or nearly continuous superimposed services over a geographical area to UE106A-106N and similar devices via one or more cellular communication standards.

[0051] Therefore, as shown in Figure 1, base station 102A can function as a “serving cell” for UEs 106A to 106N, and each UE 106 can also receive signals from one or more other cells (which may be provided by base stations 102B to 102N and / or any other base stations) (within their communication range, if possible). Such cells can also facilitate communication between user devices and / or between user devices and the network 100. Such cells may include “macro” cells, “micro” cells, “pico” cells, and / or cells that provide any other granularity of service area size. For example, base stations 102A to 102B shown in Figure 1 may be macrocells, and base station 102N may be a microcell. Other configurations are also possible.

[0052] In some embodiments, base station 102A may be a next-generation base station, such as a 5G New Radio (5G NR) base station, or a "gNB". In some embodiments, the gNB may be connected to a conventional evolved packet core (EPC) network and / or an NR core (NRC) network. In addition, a gNB cell may include one or more transition and reception points (TRPs). In addition, UEs capable of operating in accordance with 5G NR may be connected to one or more TRPs in one or more gNBs.

[0053] In addition, UE106 may communicate with access point 112 using, for example, wireless networking (e.g., Wi-Fi) and / or peer-to-peer wireless communication protocols (e.g., Bluetooth, Wi-Fi peer-to-peer, etc.). Access point 112 can provide a connection to network 100.

[0054] It should be noted that UE106 may be capable of communicating using multiple wireless communication standards. For example, UE106 may be configured to communicate using at least one cellular communication protocol (e.g., LTE, LTE-A, 5G NR, etc.) in addition to wireless networking (e.g., Wi-Fi) and / or peer-to-peer wireless communication protocols (e.g., Bluetooth, Wi-Fi peer-to-peer, etc.). In addition, or alternatively, UE106 may be configured to communicate using one or more Global Navigational Satellite Systems (GNSS, e.g., GPS or GLONASS), one or more mobile television broadcasting standards (e.g., ATSC-M / H or DVB-H), and / or any other wireless communication protocols, if desired. Other combinations of wireless communication standards (including three or more wireless communication standards) are also possible. Figure 2 - Block diagram of a base station

[0055] Figure 2 shows an exemplary block diagram of a base station 102 according to several embodiments. Note that the base station in Figure 3 is only one example of a possible base station. As shown, the base station 102 includes one or more processors 204 capable of executing program instructions for the base station 102. The processors 204 may also be coupled to a memory management unit (MMU) 240, which may be configured to receive addresses from the processors 204 and translate those addresses to locations in memory (e.g., memory 260 and read-only memory (ROM) 250) or to other circuits or devices.

[0056] The base station 102 may include at least one network port 270. The network port 270 may be connected to a telephone network and configured to provide multiple devices, such as UE devices 106, with access to the telephone network as described in Figures 1 and 2 above.

[0057] Network port 270 (or additional network ports) may also, or alternatively, be configured to connect to the cellular network of a cellular service provider's core network. The core network may provide mobility-related services and / or other services to multiple devices, such as UE device 106. In some cases, network port 270 may be connected to a telephone network via the core network, and / or the core network may provide a telephone network (for example, between other UE devices serviced by the cellular service provider).

[0058] In some embodiments, base station 102 may be a next-generation base station, for example, a 5G New Radio (5G NR) base station, or a "gNB". In such embodiments, base station 102 may be connected to a conventional evolved packet core (EPC) network and / or an NR core (NRC) network. In addition, base station 102 may be considered a 5G NR cell and may include one or more transition and receive points (TRPs). In addition, UEs capable of operating according to 5G NR may be connected to one or more TRPs in one or more gNBs.

[0059] The base station 102 may include at least one antenna 234, and potentially more antennas. At least one antenna 234 may be configured to operate as a radio transceiver and may be further configured to communicate with the UE device 106 via a radio 230. The antenna 234 communicates with the radio 230 via a communication chain 232. The communication chain 232 may be a receive chain, a transmit chain, or both. The radio 230 may be configured to communicate via a variety of wireless communication standards, including but not limited to 5G NR, LTE, LTE-A, and Wi-Fi.

[0060] Base station 102 can be configured to communicate using multiple wireless communication standards. In some cases, base station 102 may include multiple radios, which may enable base station 102 to communicate according to multiple wireless communication technologies. For example, one possibility is that base station 102 may include an LTE radio for performing communication according to LTE, and a 5G NR radio for performing communication according to 5G NR. In such a case, base station 102 may be capable of operating as both an LTE base station and a 5G NR base station. Another possibility is that base station 102 may include a multimode radio, which may perform communication according to any of multiple wireless communication technologies (e.g., 5G NR and Wi-Fi, LTE and Wi-Fi, etc.).

[0061] As further described below in this specification, BS102 may include hardware and software components for implementing or supporting the implementation of the features described herein. The processor 204 of the base station 102 may be configured to implement or support some or all of the methods described herein by executing program instructions stored in a memory medium (e.g., a non-temporary computer-readable memory medium). Alternatively, the processor 204 may be configured as a programmable hardware element such as an FPGA (Field-Programmable Gate Array), or as an ASIC (Application-Specific Integrated Circuit), or a combination thereof. Alternatively (or in addition), the processor 204 of BS102 may be configured to perform or support some or all of the features described herein together with one or more of the other components 230, 232, 234, 240, 250, 260, 270.

[0062] In addition, as described herein, the processor(s) 204 may consist of one or more processing elements. In other words, one or more processing elements may be contained within the processor(s) 204. Thus, the processor(s) 204 may include one or more integrated circuits (ICs) configured to perform the functions of the processor(s) 204. In addition, each integrated circuit may include circuits (e.g., a first circuit, a second circuit, etc.) configured to perform the functions of the processor(s) 204.

[0063] Furthermore, as described herein, the radio 230 may consist of one or more processing elements. In other words, one or more processing elements may be included within the radio 230. Thus, the radio 230 may include one or more integrated circuits (ICs) configured to perform the functions of the radio 230. In addition, each integrated circuit may include circuits (e.g., a first circuit, a second circuit, etc.) configured to perform the functions of the radio 230. Figure 3: Block diagram of the UE

[0064] Figure 3 shows an exemplary simplified block diagram of a communication device 106 according to several embodiments. Note that the block diagram of the communication device in Figure 3 is only one example of a possible communication device. According to embodiments, the communication device 106 may be a combination of, among other devices, a User Equipment (UE) device, a mobile device or mobile station, a radio device or radio station, a desktop computer or computing device, a mobile computing device (e.g., a laptop, notebook, or portable computing device), a tablet, an unmanned aerial vehicle (UAV), a UAV controller (UAC), and / or other devices. As shown in the figure, the communication device 106 may include a set of components 300 configured to perform core functions. For example, this set of components may be implemented as a system on a chip (SOC) which may include parts for various purposes. Alternatively, this set of components 300 may be implemented as separate components or groups of components for various purposes. The set of components 300 may be coupled (e.g., directly or indirectly communicatively) to various other circuits of the communication device 106.

[0065] For example, the communication device 106 may include various types of memory (including, for example, NAND flash 310), an input / output interface such as a connector I / F 320 (for connecting to, for example, a computer system, a dock, a charging station, an input device such as a microphone, a camera, a keyboard, or a speaker), a display 360 which may be integrated with or outside the communication device 106, a cellular communication circuit 330 for 5G NR, LTE, GSM, etc., a short-to-medium-range wireless communication circuit 329 (e.g., Bluetooth® and WLAN circuit), and a wake-up wireless circuit 331. In some embodiments, the communication device 106 may include a wired communication circuit (not shown), such as a network interface card for Ethernet.

[0066] The cellular communication circuit 330 may be coupled (e.g., directly or indirectly, in a communicative manner) to one or more antennas, such as antennas 335 and 336, as shown in the figure. The short-to-medium range wireless communication circuit 329 may also be coupled (e.g., directly or indirectly, in a communicative manner) to one or more antennas, such as antennas 337 and 338, as shown in the figure. Alternatively, the short-to-medium range wireless communication circuit 329 may be coupled (e.g., directly or indirectly, in a communicative manner) to antennas 335 and 336, in addition to or instead of coupling (e.g., directly or indirectly, in a communicative manner) to antennas 337 and 338. The wake-up wireless circuit 331 may also be coupled (e.g., directly or indirectly, in a communicative manner) to one or more antennas, such as antennas 339a and 339b, as shown in the figure. Alternatively, the wake-up radio circuit 331 may be coupled to antennas 335 and 336 (e.g., directly or indirectly, in a communicative manner), or instead, to antennas 339a and 339b (e.g., directly or indirectly, in a communicative manner). The short-to-medium-range radio communication circuit 329 and / or cellular communication circuit 330 may include multiple receive chains and / or transmit chains for receiving and / or transmitting multiple spatial streams in a multiple-input multiple output (MIMO) configuration, for example. The wake-up radio circuit 331 may include a wake-up receiver; for example, the wake-up radio circuit 331 may be a wake-up receiver. In some cases, the wake-up radio circuit 331 may be a low-power and / or ultra-low-power wake-up receiver. In some cases, the wake-up radio circuit may only be powered / active when the cellular communication circuit 330 and / or the short-to-medium-range radio communication circuit 329 are in a sleep / no-power / inactive state. In some cases, the wake-up radio circuit 331 may monitor a specific frequency / channel for the wake-up signal (e.g., periodically). Reception of the wake-up signal can trigger the wake-up radio circuit 331 to notify (e.g., directly and / or indirectly) the cellular communication circuit 330 to enter a powered / active state.

[0067] In some embodiments, as further described below, the cellular communication circuit 330 may include dedicated receiving chains for multiple RATs (e.g., a first receiving chain for LTE and a second receiving chain for 5G NR) (e.g., including dedicated processors and / or radios, and / or directly or indirectly coupled to the dedicated processors and / or radios in a communicative manner). In addition, in some embodiments, the cellular communication circuit 330 may include a single transmitting chain that can be switched between radios dedicated to a particular RAT. For example, the first radio may be dedicated to a first RAT, e.g., LTE, and may communicate with a dedicated receiving chain and a transmitting chain shared with an additional radio, e.g., a second radio, and the second radio may be dedicated to a second RAT, e.g., 5G NR, and may communicate with a dedicated receiving chain and a shared transmitting chain.

[0068] The communication device 106 may also include and / or be configured for use with one or more user interface elements. The user interface elements may include any of a variety of elements, such as a display 360 (which may be a touchscreen display), a keyboard (which may be a separate keyboard or implemented as part of a touchscreen display), a mouse, a microphone and / or a speaker, one or more cameras, one or more buttons, and / or any of a variety of other elements capable of providing information to the user and / or receiving or interpreting user input.

[0069] The communication device 106 may further include one or more smart cards 345, each smart card 345 containing subscriber identity module (SIM) functionality, such as one or more Universal Integrated Circuit Cards (UICCs). It should be noted that the terms “SIM” or “SIM entity” are intended to include various types of SIM implementations or SIM functionalities, such as one or more UICC(s) cards 345, one or more eUICCs, or one or more eSIMs, whether removable or embedded. In some embodiments, the UE 106 may include at least two SIMs. Each SIM may perform one or more SIM applications and / or implement SIM functionality. Thus, each SIM may be, for example, a single embeddable smart card that can be soldered onto a circuit board within the UE 106, or each SIM 310 may be implemented as a removable smart card. Therefore, the SIM may be one or more removable smart cards (such as UICC cards, which are sometimes called "SIM cards"), and / or the SIM310 may be one or more built-in cards (for example, embedded UICCs (eUICCs), which are sometimes called "eSIMs" or "eSIM cards").

[0070] As shown in the figure, the SOC 300 may include one or more processors 302 capable of executing program instructions for the communication device 106, and a display circuit 304 capable of performing graphics processing and providing display signals to the display 360. The one or more processors 302 may be coupled to a memory management unit (MMU) 340, which may be configured to receive addresses from the one or more processors 302, and to translate those addresses to locations in memory (e.g., memory 306, read-only memory (ROM) 350, NAND flash memory 310), and / or to other circuits or devices such as the display circuit 304, the short-to-medium-range wireless communication circuit 329, the cellular communication circuit 330, the connector I / F 320, and / or the display 360. The MMU 340 may be configured to perform memory protection and page table conversion or setup. In some embodiments, the MMU 340 may be included as part of the one or more processors 302.

[0071] As described above, the communication device 106 may be configured to communicate using wireless and / or wired communication circuits. Note that, as further described herein, the communication device 106 may be configured to perform, for example, methods for sidelink unauthorized bandwidth (SL-U) cyclic prefix extension (CPE) initiation position and identifier (ID) restriction for channel time occupancy (COT) sharing in 5G NR systems and later.

[0072] As described herein, the communication device 106 may include hardware and software components that implement the above-described features for the communication device 106 to communicate a power-saving scheduling profile to a network. The processor 302 of the communication device 106 may be configured to implement some or all of the features described herein by executing program instructions stored in a memory medium (e.g., a non-temporary computer-readable memory medium). Alternatively (or in addition), the processor 302 may be configured as a programmable hardware element such as a field-programmable gate array FPGA, or as an application-specific integrated circuit (ASIC). Alternatively (or in addition), the processor 302 of the communication device 106 may be configured to implement some or all of the features described herein together with any one or more of the other components 300, 304, 306, 310, 320, 329, 330, 340, 345, 350, 360.

[0073] In addition, as described herein, the processor 302 may include one or more processing elements. Thus, the processor 302 may include one or more integrated circuits (ICs) configured to perform the functions of the processor 302. In addition, each of the integrated circuits may include circuits (e.g., a first circuit, a second circuit, etc.) configured to perform the functions of the processor(s) 302.

[0074] Furthermore, as described herein, each of the cellular communication circuit 330 and the short / medium-range wireless communication circuit 329 may include one or more processing elements. In other words, the cellular communication circuit 330 may include one or more processing elements, and similarly, the short / medium-range wireless communication circuit 329 may include one or more processing elements. Therefore, the cellular communication circuit 330 may include one or more integrated circuits (ICs) configured to perform the functions of the cellular communication circuit 330. In addition, each integrated circuit may include circuits (e.g., a first circuit, a second circuit, etc.) configured to perform the functions of the cellular communication circuit 330. Similarly, the short / medium-range wireless communication circuit 329 may include one or more ICs configured to perform the functions of the short / medium-range wireless communication circuit 329. In addition, each integrated circuit may include circuits (e.g., a first circuit, a second circuit, etc.) configured to perform the functions of the short / medium-range wireless communication circuit 329. Figure 4 - Block diagram of a modem or baseband processor

[0075] Figure 4 shows an exemplary block diagram of a modem 400, which may also be referred to as a baseband processor 400, according to several embodiments. The modem 400 may provide signal processing functions for one or more wireless communication technologies, such as Wi-Fi, Bluetooth®, and / or cellular (e.g., 3GPP®) communication technologies. Thus, in one possibility, the modem 400 may represent a Wi-Fi modem. For example, the modem 400 shown in Figure 4 may represent one possible example of the Wi-Fi modem 232 shown in Figure 2. In another possibility, the modem 400 may represent a cellular modem or a cellular baseband processor. For example, the modem 400 shown in Figure 4 may represent one possible example of the cellular modem 234 shown in Figure 2. In yet another possibility, the modem 400 may represent a Bluetooth modem. For example, the modem 400 shown in Figure 4 may represent one possible example of the Wi-Fi modem 236 shown in Figure 2. In some embodiments, the modem 400 may implement functions to support communication according to multiple wireless communication technologies. In at least some embodiments, the modem 400 may run a real-time operating system, for example, to facilitate the execution of timing-dependent wireless communication functions.

[0076] The modem 400 may include a processing circuit 402 which may include one or more processor cores, ASICs, programmable hardware elements, digital signal processors, and / or other processing elements. The processing circuit may be capable of preparing baseband signals for upconversion and transmission by the radio circuit of a wireless device, and / or for processing baseband signals received and downconverted by the radio circuit of a wireless device. Such processing may include signal modulation, coding, decoding, etc., among a variety of possible functions. The processing circuit may similarly or alternatively perform functions for one or more baseband and / or other layers / sublayers of the protocol stack for (one or more) wireless communication technologies implemented by the modem 400, such as physical layer (PHY) functions, media access control (MAC) functions, logic link control (LLC) functions, radio resource control (RRC) functions, and radio link control (RLC) functions. In some embodiments, the modem 400 itself may include at least some radio circuits (for example, for performing the conversion of an input baseband signal to a radio frequency signal, and / or the conversion of an input radio frequency signal to a baseband signal). Alternatively, or in addition, some or all of such functions may be performed by separate radio / transceiver components of the wireless device.

[0077] The modem 400 may also include a memory 404 which may include a non-temporary computer-readable memory medium. The memory 404 may include program instructions for performing signal processing and / or any of a variety of possible general processing functions. The processing circuit 402 may be capable of executing program instructions stored in the memory 404. The memory 404 may also store data that is generated and / or used during processing performed by the processing circuit 402.

[0078] As shown in the figures, the modem 400 may further include interface circuits for communicating with other components of the wireless device (such as the STA106 or AP104 shown in Figures 1 to 3), such as an application processor, a wireless / transceiver circuit, and / or various other components. Such interfaces can be implemented in any of several ways. For example, one possibility is that the modem 400 has a direct interface with the transceiver circuit of the wireless device, and an additional indirect interface with the application processor and / or other components of the wireless device via a system bus. Other configurations are also possible.

[0079] According to at least some embodiments, the hardware and software components of the modem 400 may be configured to implement or support the implementation of features described herein, in particular, among a variety of other possible features, such as, for example, methods for implementing sidelink unlicensed bandwidth (SL-U) cyclic prefix extension (CPE) start positions and identifier (ID) restrictions for channel time occupancy (COT) sharing in 5G NR systems and beyond. The processing circuit 402 of the modem 400 may be configured to implement or support some or all of the methods described herein, for example, by executing program instructions stored in memory (e.g., non-temporary computer-readable memory medium) 404 and / or by using dedicated hardware components. SL-U CPE starting position and ID restrictions for COT sharing

[0080] Currently, in dynamic channel access modes with multichannel access in sidelink unlicensed (SL-U) operation, it is agreed that both NR-unlicensed (NR-U) downlink type A (e.g., the device performs individual backoff instances for each carrier before accessing the carrier) and type B (e.g., the device performs backoff instances on a randomly selected set of carriers or resource blocks (RBs), and if successful, performs type 2 channel access on other carrier / RB sets so that the device can access the group of channels simultaneously) multichannel access procedures are supported for multiple physical sidelink feedback channel (PSFCH) transmissions over multiple channels. However, various questions remain for further study, including whether such mechanisms can initiate shared channel occupancy time (COT) and / or whether there are any specific processes required for transmissions in shared COT on one or more channels.

[0081] Furthermore, when initiating a COT, if multiple cyclic prefix extension (CPE) initiation candidate positions are (pre-)configured for physical sidelink control channel (PSCCH) / physical sidelink shared channel (PSSCH) transmissions, for partial resource block (RB) set resource allocation, the UE may select a CPE initiation position according to one of several criteria that may be down-selected based on reservation information. These criteria may include the (pre-)configured default CPE initiation position and the highest priority among the detected and transmitted reservations (note that it is necessary to determine the exact conditions and how to use the reservation information). Other criteria left for future research include whether such behavior should be permitted for full RB set resource allocation, whether the use of reservation information may be conditional on the presence of other technologies (e.g., NR-U), and / or other conditions / criteria including a comparison of an energy detection threshold (EDT) with the measured energy associated with an existing reservation. Furthermore, when initiating a COT, if multiple CPE start candidate positions are (pre)configured for PSCCH / PSSCH transmissions, the CPE start position for a complete RB set resource allocation will be randomly selected from one or more (pre)configured CPE start candidate positions for each PSCCH / PSSCH transmission priority. However, what remains to be studied for future research is whether such behavior should be permitted for partial RB set resource allocations (note that it needs to be determined whether and how the exact conditions and reservation information should be used), whether the UE should use only the selected CPE start position, or whether later CPE start positions (e.g., if they have failed or not terminated) may also be used, and whether the use of reservation information is conditional on the presence of other technologies (e.g., NR-U). In addition, whether any of these behaviors apply only to mode 2 operation or can also include mode 1 operation is left to be studied for future research.In addition, it should be noted that in sidelinks, resource reservations can be sent for periodic transmissions (e.g., when initial transmission resources may be reserved) and Hybrid Automatic Retransmission Request (HARQ) transmissions (e.g., when initial transmission may reserve resources for HARQ retransmissions if necessary), but there are no dedicated reservation signal transmissions (e.g., burst transmissions where initial transmission cannot be reserved).

[0082] Furthermore, it is agreed that a responding UE on a shared COT may be a receiving UE (e.g., the target of a COT initiator's PSCCH / PSSCH transmission) or a UE identified by ID. Note that in the case of a unicast from a COT initiator, a responding UE may be transmitted within the same COT if the source ID and destination ID included in the COT initiator's sidelink control information (SCI) match the corresponding destination ID and source ID for the same unicast in the receiving UE. Furthermore, note that in the case of groupcasts and broadcasts, a responding UE may be transmitted within the same COT if the destination ID included in the COT initiator's SCI matches a known destination ID in the receiving UE. Furthermore, a UE identified by ID may be transmitted within the same COT as the COT initiator if additional IDs (in addition to the source ID and destination ID for a PSCCH / PSSCH transmission) are supported in the COT shared information, and if additional IDs are included in the COT shared information from the COT initiator. However, what remains for future research are limitations on what additional IDs may be included and how these additional IDs may be represented. Currently, with respect to SL-U COT sharing, if the COT is initialized with a partial RB transmission, multiple initiating UEs can be initiating UEs, each of which can share additional IDs that could lead to over-sharing of the COT with increased competition, as shown, for example, in Figure 5.

[0083] In addition, blocking issues may exist between Type 2A and Type 2B / 2C. In particular, in the case of COT sharing, it is unclear how the sidelink UE determines whether Type 2A, Type 2B, or Type 2C is used.

[0084] Therefore, in light of the above, the following issues were identified and improvements were desired. First, in the case of PSFCH multichannel transmission, the interaction between Type 1 Clear Channel Assessment (CCA) and Type 2 CCA within a shared COT is unclear. Second, the selection of the CPE start position remains unclear. Third, in the case of SL-U COT sharing, it remains unclear when additional IDs can be indicated by the COT initiator. Finally, in the case of COT sharing, it is unclear how the SL UE determines whether Type 2A, Type 2B, or Type 2C is used.

[0085] Embodiments described herein provide systems, methods, and mechanisms for sidelink unauthorized bandwidth (SL-U) cyclic prefix extension (CPE) start position and identifier (ID) restriction for channel time occupancy (COT) sharing, including systems, methods, and mechanisms for COT sharing for PSFCH multichannel transmission, CPE start position determination in SL-U, ID restriction for SL-U COT sharing, and determining when to use Type 2A, Type 2B, and / or Type 2C in SL-U COT sharing.

[0086] For example, in some cases, for multi-channel access in SL-U, a COT initiated by a PSFCH type 1 channel access does not need to be shared with other UEs (e.g., for another UE to transmit during the COT). In such cases, the source ID does not need to be included in the PSFCH. In other cases, for multi-channel access in SL-U, a COT initiated by a PSFCH type 1 channel access may be shared with the corresponding UE (e.g., the UE receiving the transmission from the COT initiator). In such cases, note that only UEs receiving acknowledgment (ACK) / negative acknowledgment (NACK) feedback, or only NACKs in the case of groupcasts, may share the COT. In addition, UEs may know that the PSFCH is not transmitted using a shared COT. Note that the default Channel Access Priority Class (CAPC) can be priority 1. Therefore, a sharing UE can only transmit traffic that has CAPC priority 1 traffic. In another example, in the case of multi-channel access in SL-U, the COT initiated by a PSFCH type 1 channel access may be shared by all UEs that may be expecting to send an ACK / NACK.

[0087] As another example, in the case of multichannel access in SL-U, when PSFCH transmission within the COT is type 2 channel access, outside the COT it can be type 1 channel access, and DL types A and B may be used. In addition, the first UE (e.g., UE1) may transmit PSFCH in different RB sets, some of which may be a shared COT, and some of which may require type 1 channel access. Therefore, in some cases, the first UE (e.g., UE1) may perform a type A1 (e.g., independent random draw) multichannel access procedure when outside the COT, and independently perform type 2 channel access within the COT, for example, each RB set within the COT may be independently selected based on random numbers. In other cases, the first UE (e.g., UE1) may perform a type A2 (e.g., maximum value of selected random numbers) multichannel access procedure when outside the COT (e.g., random numbers may be generated for each RB set, and the maximum value of the random numbers may be used for all RB sets). In another example, a first UE (e.g., UE1) may perform a Type B multichannel access procedure on one of the RB sets that may be randomly selected from the RB sets outside the COT. Furthermore, since Type 2A channel access may be required for the remaining RB sets to be transmitted, the same Type 2A channel access may be used for both inside and outside the COT.

[0088] As an example, Figure 6 shows a UE that provides feedback on both the inner and outer PSFCH of a corresponding COT according to several embodiments. As shown in the figure, a first UE (e.g., UE1), which may be UE106, may have sidelink communication, e.g., SL-U communication, with one or more other UEs, e.g., UE2, UE3, and UE4. Sidelink communication with UE2 may take place on a first set of resource blocks (RBs) (e.g., RBset1), sidelink communication with UE3 may take place on a second set of RBs (e.g., RBset2), and sidelink communication with UE4 may take place on a third set of RBs (e.g., RBset3). Furthermore, as shown in the figure, UE1 may provide feedback on transmissions received from UE2 on the PSSCH / PSCCH in a COT-initiated UE2 outside the COT (e.g., UE2 COT) initiated by UE2, feedback on transmissions on the PSSCH / PSCCH in a COT-initiated UE3 inside the COT (e.g., UE3 COT) initiated by UE3, and feedback on transmissions received from UE4 on the PSSCH / PSCCH in a COT-initiated UE4 outside the COT (e.g., UE4 COT) initiated by UE4, for example via the PSFCH. Thus, in some cases, UE1 may perform type A1 or type A2 channel access to access RBset1 and RBset3 to provide feedback outside the UE2 COT and UE4 COT, and type A2 or type 2 channel access to access RBset2 to provide feedback inside the UE3 COT.

[0089] As another example, in some cases, for full-bandwidth transmissions, a UE such as UE106 may randomly select one CPE from several configured CPE positions to determine and / or select a CPE start position. In some cases, if a Clear Channel Access (CCA) procedure fails for a randomly selected CPE position and / or when it fails, the UE may reinstate / restart a Type 1 CCA procedure. In some cases, when the UE does not detect an existing reservation and the UE has not transmitted a reservation, the UE may select a full-bandwidth transmission and may use multiple CPE positions to avoid inference. In some cases, the UE may select a partial-bandwidth transmission (for example, due to a small payload size). In such cases, an initial transmit reservation may have a higher priority than a HARQ retransmission. In addition, if the UE detects that a reserved / transmitted reservation is for a HARQ retransmission, the UE may use one default CPE start position to allow other UEs to multiplex together. Furthermore, if the UE detects that a reserved / sent reservation is for an initial send, it may use a larger CPE regardless of which traffic has a higher priority (for example, a lower-priority send may be blocked).

[0090] As a further example, in some cases, in the case of SL-U UE COT sharing, a responding UE such as UE106 may transmit on any resource in the shared RB set, as shown, for example, in Figure 7. As illustrated, a COT initiator, for example UE2 which may be UE106, may transmit to a responding UE, for example UE1 which may be UE106, using partial bandwidth (e.g., a portion of a resource block (RB) set such as RBset1). The responding UE may then transmit to the COT initiator using some or all of the bandwidth (e.g., some or all of the RB set). In some cases, when additional IDs are used in the case of SL-U COT sharing, additional IDs may only be included when the COT initiator UE has full bandwidth transmissions. Alternatively, in some cases, when additional IDs are used for SL-U COT sharing, additional IDs may be included when the COT initiator UE has full bandwidth transmissions and the COT initiator UE expects transmissions from the responding UE (e.g., interactive traffic).

[0091] As yet another example, in some cases, for SL-U UE COT sharing, the default configuration for Clear Channel Access (CCA) may be Type 2A (e.g., a 25-microsecond listening gap), as shown in Figure 8. As illustrated, UE2 and UE4, both of which may be UE106, may each transmit over a partial bandwidth (e.g., each may use a portion of the resource block set, such as RBset 1). Thus, after a gap based on Type 2A CCA, UE1 may transmit to UE2, and UE4 may transmit to UE3 again. In some cases, for SL-U UE COT sharing, when a COT initiator UE such as UE106 uses full-bandwidth transmission, the initiator COT UE may be configured to Type 2B or Type 2C CCA, for example, via Sidelink Control Information (SCI) COT sharing information, as shown in Figure 9. As illustrated, UE2 may transmit over the full bandwidth for transmission to UE1 (e.g., using the entire resource block set, such as RBset 1). Furthermore, since UE2 continues transmitting to UE3, for example, UE2 may not leave a gap between transmissions. However, once UE2 completes its transmission, a gap based on type 2B or type 2C CCA may be used before UE1 and UE3 transmit to UE2. In some cases, with SL-U UE COT sharing, to avoid multiple initiating COT UEs (e.g., for partial bandwidth transmissions) giving different type 2A / type 2B / type 2C indications, only the initiator COT UE initiating a full-bandwidth transmission dynamically indicates the CCA type when the CCA type is indicated by an initiator COT UE such as UE106. In such cases, an initiator COT UE using a partial bandwidth transmission may not be allowed to dynamically indicate the CCA type, and for example, as shown in Figure 10, a default CCA may always be indicated. As illustrated, UE2 may be performing a group cast to UE1 and UE3. In such cases, after a gap based on Type 2B or Type 2C CCA, UE1 and UE3 may transmit to UE2.In some cases, when SL-U UE COT sharing occurs, gap symbols may be included between transmissions when the transmitting UE changes. In some cases, the gap symbols may be a PSSCH transmission with rate matching, a transmission of one symbol of the CPE, and / or a transmission of the CPE with a length equal to one symbol (e.g., 16 microseconds).

[0092] Figure 11 is a block diagram of an example of a method for COT sharing of a PSFCH according to several embodiments. The method shown in Figure 11 can be used in conjunction with any of the systems, methods, or devices shown in the figure, among other devices. For example, the processor of such a device (such as the baseband processor 400 shown and described in relation to Figure 4) may be configured to cause the device to execute any combination of the method elements shown in the figure and / or other method elements. In various embodiments, some of the illustrated method elements may be executed simultaneously, in a different order than those shown, or omitted. Additional method elements may be executed as needed. As shown in the figure, this method may operate as follows:

[0093] In 1102, a UE such as UE106 may initiate channel access in the SL-U spectrum via an NR DL type A or NR DL type B multichannel access procedure in order to perform multiple PSFCH transmissions on multiple channels.

[0094] In 1104, a UE may have channel occupancy time (COT). In some cases, when COT is initiated by a PSFCH type 1 channel access, the UE may not share COT with other UEs, may share COT with the corresponding UE, or may share COT with any UE that expects feedback during COT. In some cases, when COT is not shared with other UEs, the UE may not include a source identifier (ID) in the PSFCH. In some cases, when COT is not shared with other UEs, the UE may not include a destination identifier (ID) in the PSFCH. In some cases, when COT is shared with a corresponding UE, the corresponding UE may be defined as a UE that receives feedback for unicast transmissions between the UE and the corresponding UE, or a UE that receives negative response (NACK) feedback for groupcast transmissions. In some cases, COT may not be a shared COT. In some cases, the default channel access priority class (CAPC) may be 1. In such cases, the corresponding UE may be limited to transmitting traffic with CAPC priority 1 traffic. In some cases, the feedback may include at least one of either an acknowledgment (ACK) or a negative acknowledgment (NACK) sent over the PSFCH.

[0095] Figure 12 is a block diagram of an example of a method for selecting a CPE start position for sidelink physical channel transmission according to several embodiments. The method shown in Figure 12 can be used in conjunction with any of the systems, methods, or devices shown in the figure, among other devices. For example, the processor of such a device (such as the baseband processor 400 shown and described in relation to Figure 4) may be configured to cause the device to execute any combination of the method elements shown in the figure and / or other method elements. In various embodiments, some of the illustrated method elements may be executed simultaneously, in a different order than those shown, or omitted. Additional method elements may be executed as needed. As shown in the figure, this method may operate as follows:

[0096] In 1202, a UE such as UE106 may detect whether there is a reservation for a sidelink physical channel as part of initiating COT on the sidelink physical channel. A sidelink physical channel may include at least one of a physical sidelink control channel (PSCCH) or a physical sidelink shared channel (PSSCH).

[0097] In 1204, the UE may, upon detecting that there is no reservation for the sidelink physical channel, initiate full-bandwidth transmission on the sidelink physical channel and select multiple CPE start positions to avoid interference. In some cases, to select multiple CPE start positions to avoid interference, the UE may randomly select a first CPE start position from the multiple CPE start positions, perform a CCA procedure for the first CPE start position, and, upon failure of the CCA procedure using the first CPE start position, randomly select a second CPE start position from the multiple CPE start positions and perform a CCA procedure for the second CPE start position. In some cases, to select multiple CPE start positions to avoid interference, the UE may randomly select a first CPE start position from the multiple CPE start positions, perform a CCA procedure for the first CPE start position, and, upon failure of the CCA procedure using the first CPE start position, trigger a resource reselection procedure.

[0098] In 1206, upon detecting a reservation for a sidelink physical channel, the UE may initiate a partial bandwidth transmission on the sidelink physical channel based on one or more conditions and select a CPE start position based on one or more conditions. In some cases, one or more conditions may include whether the initial transmission for the reservation has a higher priority than a Hybrid Auto Retransmission Request (HARQ) transmission and whether the reservation is for HARQ retransmission. In some cases, when the reservation is for HARQ retransmission, the UE may select a default CPE start position to select a CPE start position based on one or more conditions. The default CPE start position may allow other UE transmissions to be multiplexed together with UE transmissions on the physical sidelink channel. In some cases, when the initial transmission for the reservation has a higher priority than a HARQ transmission, the UE may select a CPE start position based on the priority of the traffic for the partial bandwidth transmission to select a CPE start position based on one or more conditions. In such cases, higher priority traffic may use a larger CPE start position than lower priority traffic, thereby blocking the lower priority traffic.

[0099] Figure 13 is a block diagram of an example of a method for COT sharing for SL-U spectral operation according to several embodiments. The method shown in Figure 13 can be used in conjunction with any of the systems, methods, or devices shown in the figure, among other devices. For example, the processor of such a device (such as the baseband processor 400 shown and described in relation to Figure 4) may be configured to cause the device to execute any combination of the method elements shown in the figure and / or other method elements. In various embodiments, some of the illustrated method elements may be executed simultaneously, in a different order than those shown, or omitted. Additional method elements may be executed as needed. As shown in the figure, this method may operate as follows:

[0100] In 1302, UEs such as UE106 may receive information from the transmitting UE that initiated the COT. This information may be received on a shared RB set.

[0101] In 1304, the UE may send using resources within the shared RB set during COT.

[0102] In some cases, the information may be data traffic. In such cases, the UE may be a response UE during COT.

[0103] In some cases, the transmitting UE may have full bandwidth transmission capability during the COT. In such cases, the transmitting UE may anticipate interactive traffic with the responding UE. Furthermore, the information may include identifiers associated with the UE. In such cases, transmission may be based on the UE deciding to receive identifiers associated with the UE.

[0104] Figure 14 is a block diagram of an example of a method for determining the channel access type of a COT for SL-U spectral operation according to several embodiments. The method shown in Figure 14 can be used in conjunction with any of the systems, methods, or devices shown in the figure, among other devices. For example, the processor of such a device (such as the baseband processor 400 shown and described in relation to Figure 4) may be configured to cause the device to execute any combination of the method elements shown in the figure and / or other method elements. In various embodiments, some of the illustrated method elements may be executed simultaneously, in a different order than those shown, or omitted. Additional method elements may be executed as needed. As shown in the figure, this method may operate as follows:

[0105] In 1402, UEs such as UE106 may initiate channel access in the SL-U spectrum.

[0106] In 1404, the UE may decide during COT whether it will have partial bandwidth for transmission or full bandwidth for transmission.

[0107] In 1406, the UE may select a channel access type based on the decision.

[0108] In some cases, a UE may select a Type 2A CCA procedure when it has partial bandwidth for transmission during COT, in order to choose a channel access type based on its decision. Furthermore, a UE may indicate to other UEs sharing the COT that Type 2A CCA should be used during COT. Type 2A CCA may be the default CCA for SL-U COT sharing.

[0109] In some cases, when a UE has the full bandwidth for transmission during a COT, it may choose either a Type 2B CCA procedure or a Type 2C CCA procedure to select a channel access type based on its decision. Furthermore, the UE may indicate the selected channel access type to other UEs sharing the COT.

[0110] In some cases, gap symbols may be included between transmissions from different UEs. In some cases, gap symbols may be included as one symbol in the CPE and / or as one symbol in the cyclic prefix extension (CPE) length during transmissions on a physical sidelink shared channel (PSSCH) using rate matching.

[0111] It should be fully understood that the use of personally identifiable information should adhere to privacy policies and practices that are generally recognized as meeting or exceeding industry or government requirements for maintaining user privacy. In particular, personally identifiable information data should be managed and handled in a manner that minimizes the risk of unintended or unauthorized access or use, and the nature of authorized use should be clearly indicated to the user.

[0112] Embodiments of the present disclosure can be implemented in any of the following forms. For example, some embodiments may be implemented as a method executed by a computer, on a computer-readable storage medium, or on a computer system. Other embodiments may be implemented using one or more custom-designed hardware devices, such as ASICs. Still other embodiments may be implemented using one or more programmable hardware elements, such as FPGAs.

[0113] In some embodiments, a non-temporary computer-readable memory medium may be configured to store program instructions and / or data, which, when executed by a computer system, cause the computer system to execute the Method, for example, any embodiment of the Method described herein, a combination of embodiments of the Method described herein, a subset of embodiments of the Method described herein, or a combination of such subsets.

[0114] In some embodiments, the device (e.g., UE 106) may be configured to include a processor (or a set of processors) and a storage medium, the storage medium storing program instructions, and the processor is configured to read and execute program instructions from the storage medium, the program instructions being executable to implement various method embodiments described herein (or combinations of method embodiments described herein, or any subset of any method embodiments described herein, or combinations of such subsets). The device may be implemented in any of the various forms.

[0115] Any of the methods described herein for operating user equipment (UE) can form the basis for a corresponding method for operating a base station by interpreting each message / signal X received by the UE on the downlink as a message / signal X transmitted by the base station, and each message / signal Y transmitted by the UE on the uplink as a message / signal Y received by the base station.

[0116] Although the embodiments described above are described in considerable detail, numerous variations and modifications will become apparent to those skilled in the art if the above disclosure is fully understood. The following claims are intended to be construed as encompassing all such variations and modifications.

Claims

1. A method for sharing channel occupancy time (COT) of a physical side-link feedback channel (PSFCH), To perform multiple PSFCH transmissions on multiple channels, channel access is initiated in the sidelink-unauthorized (SL-U) spectrum via a new radio (NR) downlink (DL) type A or NR DL type B multichannel access procedure, A method comprising ensuring channel occupancy time (COT), wherein the COT is not shared with other user equipment devices (UEs) when initiated by a PSFCH type 1 channel access.

2. The source identifier (ID) is not included in the PSFCH. The method according to claim 1.

3. The destination identifier (ID) is not included in the PSFCH. The method according to claim 1.

4. When the COT is initiated by PSFCH type 2 channel access, the method is When outside the COT, further includes performing a Type A1 multichannel access procedure. The method according to claim 1.

5. Performing the aforementioned Type A1 multichannel access procedure includes randomly selecting a set of resource blocks located outside the COT. The method according to claim 4.

6. When the COT is initiated by PSFCH type 2 channel access, the method is The procedure further includes performing a Type A2 multichannel access procedure when outside the COT. The method according to claim 1.

7. Executing the aforementioned Type A2 multichannel access procedure means that Assigning random numbers to each resource block set located outside the aforementioned COT, This includes selecting the resource block set to which the maximum number of random numbers is assigned, The method according to claim 6.

8. When the COT is initiated by PSFCH type 2 channel access, the method is The procedure further includes performing a Type B multichannel access procedure when outside the COT. The method according to claim 1.

9. The aforementioned Type B multichannel access procedure is executed on a subset of resource block sets located outside the COT. The method according to claim 8.

10. The subset of the resource block set is selected randomly. The method according to claim 9.

11. A baseband processor, Memory and The system comprises a processing circuit that communicates with the memory, and the processing circuit is To perform multiple physical sidelink feedback channel (PSFCH) transmissions on multiple channels, channel access is initiated in the sidelink unlicensed (SL-U) spectrum via a new radio (NR) downlink (DL) type A or NR DL type B multichannel access procedure. A baseband processor configured to ensure channel occupancy time (COT), wherein the COT is not shared with other user equipment devices (UEs) when initiated by a PSFCH type 1 channel access.

12. The source identifier (ID) is not included in the PSFCH. The baseband processor according to claim 11.

13. The destination identifier (ID) is not included in the PSFCH. The baseband processor according to claim 11.

14. When the COT is initiated by PSFCH type 2 channel access, the processing circuit is: When outside the COT, it is further configured to perform a Type A1 multichannel access procedure. The baseband processor according to claim 11.

15. When the COT is initiated by PSFCH type 2 channel access, the processing circuit is: When outside the COT, it is further configured to perform a Type A2 multichannel access procedure. The baseband processor according to claim 11.

16. When the COT is initiated by PSFCH type 2 channel access, the processing circuit is: When outside the COT, it is further configured to perform a Type B multichannel access procedure. The baseband processor according to claim 11.

17. User equipment (UE), At least one antenna, At least one radio that communicates with the aforementioned at least one antenna, An apparatus comprising at least one processor that communicates with the at least one wireless device, wherein the at least one processor communicates with the UE, To perform multiple physical sidelink feedback channel (PSFCH) transmissions on multiple channels, channel access is initiated in the sidelink unlicensed (SL-U) spectrum via a new radio (NR) downlink (DL) type A or NR DL type B multichannel access procedure. A user equipment device (UE) is configured to ensure channel occupancy time (COT), and when the COT is initiated by a PSFCH type 1 channel access, the COT is not shared with other user equipment devices (UEs).

18. The source identifier (ID) is not included in the PSFCH. The UE according to claim 17.

19. The destination identifier (ID) is not included in the PSFCH. The UE according to claim 17.

20. When the COT is initiated by PSFCH type 2 channel access, the at least one processor, When outside the COT, a Type A1 multichannel access procedure, When outside the COT, a Type A2 multichannel access procedure, or When outside the COT, it is further configured to perform at least one of the Type B multichannel access procedures. The UE according to claim 17.

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