Method and apparatus for broadband operation on unlicensed sidelink

Abstract

The present disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. An apparatus and method for broadband operation on an unlicensed sidelink (SL). A method performed by a user equipment (UE) includes determining a sidelink (SL) bandwidth portion (BWP); determining a set of intra-cell guard bands between a set of resource block sets (RB sets) and the set of RB sets; and determining a resource pool based on the set of RB sets. The lowest RB of the resource pool is aligned with the lowest RB of the first set of RBs, and the highest RB of the resource pool is aligned with the highest RB of the second set of RBs. The method further includes determining a set of sub-channels based on the resource pool, determining transmission of a physical SL shared channel (PSSCH) based on the set of sub-channels, performing an SL channel access procedure, and performing transmission of the PSSCH after successful performing of the SL channel access procedure.

Description

Technical Field

[0001] The present disclosure relates generally to wireless communication systems, and more particularly, to apparatus and methods for wideband operation on an unlicensed sidelink (SL). Background Art

[0002] Wireless communication has been one of the most successful innovations in modern history. Recently, the number of subscribers to wireless communication services exceeded 5 billion and continues to grow rapidly. Due to the increasing popularity of smartphones and other mobile data devices (such as tablets, "notepad" computers, netbooks, e-book readers, and machine-type devices) among consumers and enterprises, the demand for wireless data traffic has increased rapidly. In order to meet the high growth of mobile data traffic and support new applications and deployments, improvements in radio interface efficiency and coverage are essential. In order to meet the increased demand for wireless data services since the deployment of 4G communication systems, and to enable various vertical applications, 5G communication systems have been developed and are currently being deployed.

[0003] In addition, 5G mobile communication technology defines a wide frequency band, making high transmission rates and new services possible, and can be implemented not only in "below 6 GHz" frequency bands such as 3.5 GHz, but also in "above 6 GHz" frequency bands called millimeter waves (mmWave) including 28 GHz and 39 GHz. In addition, it has been considered to implement 6G mobile communication technology (called Beyond 5G System) in the terahertz (THZ) frequency band (e.g., 95 GHz to 3 THz frequency band) in order to achieve a transmission rate 50 times faster than 5G mobile communication technology and an ultra-low latency of one tenth of 5G.

[0004] At the beginning of the development of 5G mobile communication technology, in order to support services and meet performance requirements related to enhanced mobile broadband (eMBB), ultra-reliable and low-latency communication (URLLC), and massive machine type communication (mMTC), standardization is underway on the following technologies: beamforming and massive MIMO for mitigating radio wave path loss and increasing radio wave transmission distance in millimeter waves, support for parameter sets (e.g., operating multiple subcarrier intervals) for efficient utilization of millimeter wave resources and dynamic operation of time slot formats, initial access technology for supporting multi-beam transmission and broadband, definition and operation of BWP (bandwidth part), new channel coding methods such as LDPC (low-density parity check) codes for large-scale data transmission and polar codes for highly reliable transmission of control information, L2 preprocessing, and network slicing for providing dedicated networks dedicated to specific services.

[0005] Currently, in view of the services that 5G mobile communication technology will support, discussions are ongoing on improvements and performance enhancements of initial 5G mobile communication technology, and there is already physical layer standardization on technologies such as: V2X (Vehicle to Everything) for assisting driving determination of autonomous vehicles based on information about the location and status of the vehicle sent by the vehicle and for enhancing user convenience, NR-U (New Radio Unlicensed) for system operation in unlicensed frequency bands that complies with various regulatory requirements, NR UE power saving, NTN (Non-Terrestrial Network), which is UE-satellite direct communication for providing coverage in areas where communication with terrestrial networks is unavailable, and positioning.

[0006] In addition, in terms of air interface architecture / protocol, standardization is being conducted on technologies such as the Industrial Internet of Things (IIoT) for supporting new services through interworking and integration with other industries, IAB (Integrated Access and Backhaul) for providing nodes for network service area expansion by supporting wireless backhaul links and access links in an integrated manner, mobility enhancement including conditional handover and DAPS (Dual Active Protocol Stack) handover, and two-step random access (NR's 2-step RACH) for simplifying the random access procedure. Standardization is also being conducted on technologies such as the 5G baseline architecture (e.g., service-based architecture or service-based interface) for combining network function virtualization (NFV) and software defined network (SDN) technologies, and mobile edge computing (MEC) for receiving services based on UE location.

[0007] As 5G mobile communication systems are commercialized, the number of connected devices, which has been growing exponentially, will be connected to the communication network, and it is therefore expected that enhanced functions and performance of the 5G mobile communication system and integrated operations of the connected devices will be necessary. To this end, new research related to the following technologies is planned: extended reality (XR) for effectively supporting AR (augmented reality), VR (virtual reality), MR (mixed reality), etc., 5G performance improvement and complexity reduction by utilizing artificial intelligence (AI) and machine learning (ML), AI service support, metaverse service support, and drone communication.

[0008] Furthermore, such development of 5G mobile communication systems will serve as a foundation for developing not only new waveforms for providing coverage in the terahertz band for 6G mobile communication technology, multi-antenna transmission technologies (such as full-dimensional MIMO (FD-MIMO), array antennas, and massive antennas), metamaterial-based lenses and antennas for improving coverage of terahertz band signals, high-dimensional spatial multiplexing technologies using OAM (orbital angular momentum), and RIS (reconfigurable smart surfaces), but also full-duplex technologies for improving the frequency efficiency of 6G mobile communication technology and improving system networks, AI-based communication technologies for achieving system optimization by utilizing satellites and AI from the design stage and internalizing end-to-end AI support functions, and next-generation distributed computing technologies for achieving services with a complexity level that exceeds the operational capability limits of UEs by utilizing ultra-high performance communication and computing resources. Summary of the invention

[0009] Technical issues

[0010] The present disclosure relates to wireless communication systems, and more particularly, to broadband operation over unlicensed SLs.

[0011] Solution to the problem

[0012] In one embodiment, a user equipment (UE) in a wireless communication system is provided. The UE includes a processor configured to determine a SL bandwidth part (BWP), determine a set of resource block sets (RB-sets) and a set of intra-cell protection bands between a set of RB sets, and determine a resource pool based on the set of RB sets. The lowest RB of the resource pool is aligned with the lowest RB of the first RB set, and the highest RB of the resource pool is aligned with the highest RB of the second RB set. The processor is also configured to determine a subchannel set based on the resource pool, determine the transmission of a physical SL shared channel (PSSCH) based on the subchannel set, and perform an SL channel access procedure. The UE also includes a transceiver operably coupled to the processor, the transceiver being configured to perform transmission of the PSSCH after successfully performing the SL channel access procedure.

[0013] In another embodiment, a method performed by a UE in a wireless communication system is provided. The method includes determining a SL BWP, determining a set of RB sets and a set of intra-cell protection bands between sets of RB sets, and determining a resource pool based on the set of RB sets. The lowest RB of the resource pool is aligned with the lowest RB of the first RB set, and the highest RB of the resource pool is aligned with the highest RB of the second RB set. The method also includes determining a subchannel set based on the resource pool, determining transmission of a PSSCH based on the subchannel set, performing a SL channel access procedure, and performing transmission of the PSSCH after successfully performing the SL channel access procedure.

[0014] Other technical features may be apparent to those skilled in the art from the following drawings, descriptions and claims.

[0015] Before proceeding to the following detailed description, it may be advantageous to set forth the definitions of certain words and phrases used in this patent document. The term "coupling" and its derivatives refer to any direct or indirect communication between two or more elements, whether or not these elements are in physical contact with each other. The terms "send", "receive" and "communication" and their derivatives include direct and indirect communication. The terms "include" and "comprise" and their derivatives mean unlimited inclusion. The term "or" is inclusive, meaning and / or. The phrase "associated with..." and its derivatives refer to including, being included in, interconnected with, including, being included in, connected to or connected with, coupled to or coupled with, communicable with, cooperating with, interweaving, juxtaposing, approaching, being combined with or combined with, having, having... attributes, having a relationship with or having a relationship with, etc. The term "controller" refers to any device, system or part thereof that controls at least one operation. Such a controller can be implemented with hardware or a combination of hardware and software and / or firmware. The functions associated with any particular controller can be centralized or distributed, whether local or remote. When used with a list of items, the phrase "at least one of" means that different combinations of one or more of the listed items may be used, and only one of the items in the list may be needed. For example, "at least one of A, B, and C" includes any combination of: A, B, C, A and B, A and C, B and C, and A, B, and C.

[0016] In addition, the various functions described below can be implemented or supported by one or more computer programs, each of which is formed by a computer-readable program code and embodied in a computer-readable medium. The terms "application" and "program" refer to one or more computer programs, software components, instruction sets, processes, functions, objects, classes, instances, related data or parts thereof suitable for implementation in a suitable computer-readable program code. The phrase "computer-readable program code" includes any type of computer code, including source code, object code and executable code. The phrase "computer-readable medium" includes any type of medium that can be accessed by a computer, such as a read-only memory (ROM), a random access memory (RAM), a hard drive, a compact disc (CD), a digital video disc (DVD) or any other type of memory. "Non-transitory" computer-readable media does not include wired, wireless, optical or other communication links that transmit temporary electrical signals or other signals. Non-transitory computer-readable media include media that can permanently store data and media that can store data and overwrite it later, such as rewritable optical discs or erasable storage devices.

[0017] Definitions for other specific words and phrases are provided throughout this patent document. Those of ordinary skill in the art should understand that in many, if not most, instances, such definitions apply to prior, as well as future uses of such defined words and phrases.

[0018] Advantageous Effects of the Invention

[0019] According to the embodiments of the present disclosure, broadband operation on an unlicensed SL may be efficiently performed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] For a more complete understanding of the present disclosure and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings, wherein like reference numerals represent like parts:

[0021] Figure 1 An example wireless network according to an embodiment of the present disclosure is shown;

[0022] Figure 2 An example gNodeB (gNB) according to an embodiment of the present disclosure is shown;

[0023] Figure 3 An example UE according to an embodiment of the present disclosure is shown;

[0024] FIG4A illustrates an example of wireless transmit and receive paths according to an embodiment of the present disclosure;

[0025] FIG4B illustrates an example of wireless transmit and receive paths according to an embodiment of the present disclosure;

[0026] Figure 5An example of a resource pool according to an embodiment of the present disclosure is shown;

[0027] Figure 6 An example of RB sets within a wideband carrier according to an embodiment of the present disclosure is shown;

[0028] Figure 7 An example of a resource pool based on RB sets according to an embodiment of the present disclosure is shown;

[0029] Figure 8 Another example of a resource pool based on RB sets according to an embodiment of the present disclosure is shown;

[0030] Fig. 9 An example of a sub-channel in a resource pool based on consecutive RBs according to an embodiment of the present disclosure is shown;

[0031] Fig.10 Another example of a sub-channel in a resource pool based on consecutive RBs according to an embodiment of the present disclosure is shown;

[0032] Fig.11 Another example of subchannels in a resource pool based on consecutive RBs is shown;

[0033] Fig.12 An example of interleaving-based subchannels based on RB sets according to an embodiment of the present disclosure is shown;

[0034] Fig.13 Another example of a resource pool based on RB sets according to an embodiment of the present disclosure is shown;

[0035] Fig.14 An example of repeated SL synchronization signal block (S-SSB) transmission according to an embodiment of the present disclosure is shown;

[0036] Fig.15 An example of a dynamic mode type ASL multi-channel access process according to an embodiment of the present disclosure is shown;

[0037] Fig.16 An example of a dynamic mode type B SL multi-channel access procedure according to an embodiment of the present disclosure is shown;

[0038] Fig.17 An example of a semi-static mode SL multi-channel access process according to an embodiment of the present disclosure is shown; and

[0039] Fig.18 A flow chart of an example UE process for SL multi-channel access procedures is shown. DETAILED DESCRIPTION

[0040] Discussed below Figure 1-18The various non-limiting embodiments used to describe the principles of the present disclosure in this patent document are illustrative only and should not be interpreted in any way as limiting the scope of the present disclosure. Those skilled in the art will appreciate that the principles of the present disclosure can be implemented in any appropriately arranged system or device.

[0041] In order to meet the increased demand for wireless data services since the deployment of 4G communication systems, and to realize various vertical applications, 5G / NR communication systems have been developed and are currently being deployed. 5G / NR communication systems are considered to be implemented in high-frequency (millimeter wave) bands (e.g., 28 GHz or 60 GHz bands) to achieve high data rates, or in low-frequency bands (such as 6 GHz) to achieve robust coverage and mobility support. In order to reduce the propagation loss of radio waves and increase the transmission distance, beamforming, massive multiple-input multiple-output (MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and massive antenna technology are discussed in 5G / NR communication systems.

[0042] In addition, in the 5G / NR communication system, system network improvements are being developed based on advanced small cells, cloud radio access networks (RAN), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, mobile networks, collaborative communications, coordinated multi-point (CoMP), receiving-end interference cancellation, etc.

[0043] The discussion of 5G systems and frequency bands associated therewith is for reference, as certain embodiments of the present disclosure may be implemented in 5G systems. However, the present disclosure is not limited to 5G systems or frequency bands associated therewith, and embodiments of the present disclosure may be used in conjunction with any frequency band. For example, aspects of the present disclosure may also be applied to 5G communication systems, 6G, or even higher versions of deployments that may use terahertz (THz) frequency bands.

[0044] The following documents and standard descriptions are incorporated by reference into the present disclosure as if fully set forth herein: [1] 3GPP TS 38.211 v16.1.0, “NR; Physical channels and modulation;” [2] 3GPP TS 38.212 v16.1.0, “NR; Multiplexing and Channel coding;” [3] 3GPP TS 38.213 v16.1.0, “NR; Physical Layer Procedures for Control;” [4] 3GPP TS 38.214 v16.1.0, “NR; Physical Layer Procedures for Data;” and [5] 3GPP TS 38.331 v16.1.0, “NR; Radio Resource Control (RRC) Protocol Specification”

[0045] In order to meet the increased demand for wireless data services since the deployment of 4G communication systems, and to realize various vertical applications, 5G / NR communication systems have been developed and are currently being deployed. 5G / NR communication systems are considered to be implemented in high-frequency (millimeter wave) bands (e.g., 28 GHz or 60 GHz bands) to achieve high data rates, or in low-frequency bands (such as 6 GHz) to achieve robust coverage and mobility support. In order to reduce the propagation loss of radio waves and increase the transmission distance, beamforming, massive multiple-input multiple-output (MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and massive antenna technology are discussed in 5G / NR communication systems.

[0046] In addition, in the 5G / NR communication system, system network improvements are being developed based on advanced small cells, cloud radio access networks (RAN), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, mobile networks, collaborative communications, coordinated multi-point (CoMP), receiving-end interference cancellation, etc.

[0047] The discussion of 5G systems and frequency bands associated therewith is for reference, as certain embodiments of the present disclosure may be implemented in 5G systems. However, the present disclosure is not limited to 5G systems or frequency bands associated therewith, and embodiments of the present disclosure may be used in conjunction with any frequency band. For example, aspects of the present disclosure may also be applied to 5G communication systems, 6G, or even higher versions of deployments that may use terahertz (THz) frequency bands.

[0048] The following Figures 1 to 3 Various embodiments are described that are implemented in a wireless communication system and using Orthogonal Frequency Division Multiplexing (OFDM) or Orthogonal Frequency Division Multiple Access (OFDMA) communication techniques. Figures 1 to 3 The description is not meant to imply physical or architectural limitations to the manner in which different embodiments may be implemented. Different embodiments of the present disclosure may be implemented in any suitably arranged communications system.

[0049] Figure 1 An example wireless network 100 is shown in accordance with an embodiment of the present disclosure. Figure 1 The embodiment of the wireless network 100 shown is for illustration only. Other embodiments of the wireless network 100 may be used without departing from the scope of the present disclosure.

[0050] like Figure 1 As shown, wireless network 100 includes gNB 101 (e.g., base station BS), gNB 102, and gNB 103. gNB 101 communicates with gNB 102 and gNB 103. gNB 101 also communicates with at least one network 130 (such as the Internet, a proprietary Internet Protocol (IP) network, or other data network).

[0051] gNB 102 provides wireless broadband access to network 130 for a first plurality of user equipment (UE) within coverage area 120 of gNB 102. The first plurality of UEs includes UE 111, which may be located in a small business; UE 112, which may be located in an enterprise; UE 113, which may be a WiFi hotspot; UE 114, which may be located in a first residence; UE 115, which may be located in a second residence; and UE 116, which may be a mobile device such as a cellular phone, a wireless laptop, a wireless PDA, etc. gNB 103 provides wireless broadband access to network 130 for a second plurality of UEs within coverage area 125 of gNB 103. The second plurality of UEs includes UE 115 and UE 116. In some embodiments, one or more of gNBs 101-103 may communicate with each other and with UEs 111-116 using 5G / NR, Long Term Evolution (LTE), Long Term Evolution-Advanced (LTE-A), WiMAX, WiFi, or other wireless communication technologies.

[0052] Depending on the network type, the term "base station" or "BS" may refer to any component (or collection of components) configured to provide wireless access to a network, such as a transmission point (TP), a transmission-reception point (TRP), an enhanced base station (eNodeB or eNB), a 5G / NR base station (gNB), a macro cell, a femto cell, a WiFi access point (AP), or other wirelessly enabled devices. A base station may provide wireless access according to one or more wireless communication protocols (e.g., 5G / NR Third Generation Partnership Project (3GPP) NR, Long Term Evolution (LTE), Advanced LTE (LTE-A), High Speed ​​Packet Access (HSPA), Wi-Fi 802.11a / b / g / n / ac, etc.). For convenience, the terms "BS" and "TRP" are used interchangeably in this patent document to refer to network infrastructure components that provide wireless access to remote terminals. In addition, depending on the network type, the term "user equipment" or "UE" may refer to any component, such as a "mobile station", "subscriber station", "remote terminal", "wireless terminal", "reception point", or "user equipment". For convenience, the terms "user equipment" and "UE" are used in this patent document to refer to a remote wireless device that wirelessly accesses a BS, whether the UE is a mobile device (such as a mobile phone or smartphone) or is generally considered a fixed device (such as a desktop computer or vending machine).

[0053] The dashed lines illustrate the approximate extents of coverage areas 120 and 125, which are shown as approximately circular for purposes of illustration and explanation only. It should be clearly understood that coverage areas associated with gNBs, such as coverage areas 120 and 125, may have other shapes, including irregular shapes, depending on the configuration of the gNB and variations in the radio environment associated with natural and man-made obstacles.

[0054] As described in more detail below, one or more of UEs 111-116 include circuits, programs, or a combination thereof for performing broadband operations on the unlicensed side link. In certain embodiments, one or more of BSs 101-103 include circuits, programs, or a combination thereof for supporting broadband operations on the unlicensed side link.

[0055] although Figure 1 An example of a wireless network is shown, but Figure 1Various changes may be made. For example, wireless network 100 may include any number of gNBs and any number of UEs in any suitable arrangement. In addition, gNB 101 may communicate directly with any number of UEs and provide wireless broadband access to network 130 to these UEs. Similarly, each gNB 102-103 may communicate directly with network 130 and provide direct wireless broadband access to network 130 to the UEs. In addition, gNBs 101, 102, and / or 103 may provide access to other or additional external networks, such as an external telephone network or other type of data network.

[0056] As discussed in more detail below, wireless network 100 may facilitate communications via one or more devices (e.g., UEs 111A to 111C) that may be in SL communications with UE 111. UE 111 may communicate directly with UEs 111A to 111C via a set of SLs (e.g., SL interfaces) to provide sidelink communications, for example, where UEs 111A to 111C are remotely located, or where it is desirable to facilitate a network access connection (e.g., BS 102) beyond a traditional fronthaul and / or backhaul connection / interface. In one example, UE 111 may communicate directly with UEs 111A to 111C via SL communications, whether or not supported by BS 102. Various UEs (e.g., as shown by UEs 112 to 116) may be able to communicate one or more times with their other UEs (e.g., UEs 111A to 111C of UE 111).

[0057] Figure 2 An example gNB 102 is shown according to an embodiment of the present disclosure. Figure 2 The embodiment of gNB 102 shown is for illustration only, and Figure 1 gNBs 101 and 103 may have the same or similar configurations. However, gNBs have a variety of configurations, and Figure 2 There is no intent to limit the scope of this disclosure to any particular implementation of a gNB.

[0058] like Figure 2 As shown, the gNB 102 includes multiple antennas 205a-205n, multiple transceivers 210a-210n, a controller / processor 225, a memory 230, and a backhaul or network interface 235.

[0059] The transceivers 210a-210n receive incoming radio frequency (RF) signals from the antennas 205a-205n, such as signals transmitted by UEs in the network 100. The transceivers 210a-210n downconvert the incoming RF signals to generate IF or baseband signals. The IF or baseband signals are processed by receive (RX) processing circuits in the transceivers 210a-210n and / or the controller / processor 225, which generate processed baseband signals by filtering, decoding, and / or digitizing the baseband or IF signals. The controller / processor 225 may further process the baseband signals.

[0060] The controller / processor 225 and / or transmit (TX) processing circuitry in the transceivers 210a-210n receive analog or digital data (such as voice data, network data, email, or interactive video game data) from the controller / processor 225. The TX processing circuitry encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. The transceivers 210a-210n up-convert the baseband or IF signal to an RF signal that is transmitted via the antennas 205a-205n.

[0061] The controller / processor 225 may include one or more processors or other processing devices that control the overall operation of the gNB 102. For example, the controller / processor 225 may control the reception of UL channel signals and the transmission of DL channel signals by the transceivers 210a-210n in accordance with well-known principles. The controller / processor 225 may also support additional functionality, such as more advanced wireless communication functionality. For example, the controller / processor 225 may support beamforming or directional routing operations, in which outgoing / incoming signals from / to multiple antennas 205a-205n are weighted differently to effectively direct the outgoing signals in a desired direction. As another example, the controller / processor 225 may support methods for supporting wideband operation on an unlicensed side link. The controller / processor 225 may support any of a variety of other functions in the gNB 102.

[0062] The controller / processor 225 is also capable of executing programs and other processes, such as an OS, that reside in the memory 230. The controller / processor 225 may move data into or out of the memory 230 as required by the executing process.

[0063] The controller / processor 225 is also coupled to a backhaul or network interface 235. The backhaul or network interface 235 allows the gNB 102 to communicate with other devices or systems via a backhaul connection or network. The interface 235 can support communication over any suitable wired or wireless connection. For example, when the gNB 102 is implemented as part of a cellular communication system (such as a cellular communication system supporting 5G / NR, LTE, or LTE-A), the interface 235 can allow the gNB 102 to communicate with other gNBs via a wired or wireless backhaul connection. When the gNB 102 is implemented as an access point, the interface 235 can allow the gNB 102 to communicate with a larger network (such as the Internet) via a wired or wireless local area network or via a wired or wireless connection. The interface 235 includes any suitable structure that supports communication over a wired or wireless connection, such as Ethernet or a transceiver.

[0064] Memory 230 is coupled to controller / processor 225. Portions of memory 230 may include RAM, while other portions of memory 230 may include flash memory or other ROM.

[0065] although Figure 2 An example of a gNB 102 is shown, but the Figure 2 For example, gNB 102 may include Figure 2 Any quantity of each component shown. In addition, Figure 2 The various components in may be combined, further subdivided, or omitted, and additional components may be added according to specific needs.

[0066] Figure 3 An example UE 116 is shown in accordance with an embodiment of the present disclosure. Figure 3 The embodiment of UE 116 shown is for illustration only, and Figure 1 UEs 111-115 may have the same or similar configurations. However, UEs have a variety of configurations, and Figure 3 The scope of the present disclosure is not limited to any particular implementation of a UE.

[0067] like Figure 3 As shown, UE 116 includes antenna 305, transceiver 310, and microphone 320. UE 116 also includes speaker 330, processor 340, input / output (I / O) interface (IF) 345, input 350, display 355, and memory 360. Memory 360 includes operating system (OS) 361 and one or more applications 362.

[0068] The transceiver 310 receives an incoming RF signal sent on the SL channel by a gNB or other UE (e.g., one or more UEs 111-115) of the network 100 from the antenna 305. The transceiver 310 down-converts the incoming RF signal to generate an intermediate frequency (IF) or baseband signal. The IF or baseband signal is processed by the RX processing circuit in the transceiver 310 and / or the processor 340, which generates a processed baseband signal by filtering, decoding and / or digitizing the baseband or IF signal. The RX processing circuit sends the processed baseband signal to the speaker 330 (such as for voice data), or is processed by the processor 340 (such as for web browsing data).

[0069] The TX processing circuit in the transceiver 310 and / or the processor 340 receives analog or digital voice data from the microphone 320, or receives other outgoing baseband data (such as network data, email, or interactive video game data) from the processor 340. The TX processing circuit encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. The transceiver 310 up-converts the baseband or IF signal to an RF signal that is transmitted via the antenna 305.

[0070] The processor 340 may include one or more processors or other processing devices and execute the OS 361 stored in the memory 360 to control the overall operation of the UE 116. For example, the processor 340 may control the reception of DL and / or SL channels and / or signals and the transmission of UL and / or SL channels and / or signals by the transceiver 310 according to well-known principles. In some embodiments, the processor 340 includes at least one microprocessor or microcontroller. In some embodiments, the processor 340 includes at least one microprocessor or microcontroller.

[0071] The processor 340 is also capable of executing other processes and programs resident in the memory 360. For example, the processor 340 may execute processes for supporting or utilizing broadband operations on unlicensed SLs as described in embodiments of the present disclosure. The processor 340 may move data into or out of the memory 360 as needed to execute the processes. In some embodiments, the processor 340 is configured to execute the application 362 based on the OS 361 or in response to a signal received from the gNB or an operator. The processor 340 is also coupled to an I / O interface 345, which provides the UE 116 with the ability to connect to other devices such as laptops and handheld computers. The I / O interface 345 is a communication path between these accessories and the processor 340.

[0072] Processor 340 is also coupled to input 350 including, for example, a touch screen, a keyboard, etc., and display 355. An operator of UE 116 may use input 350 to enter data into UE 116. Display 355 may be a liquid crystal display, a light emitting diode display, or other display capable of presenting text and / or at least limited graphics, such as from a website.

[0073] Memory 360 is coupled to processor 340. Portions of memory 360 may include random access memory (RAM), while other portions of memory 360 may include flash memory or other read-only memory (ROM).

[0074] although Figure 3 An example of UE 116 is shown, but the Figure 3 Make various changes. For example, Figure 3 The various components in may be combined, further subdivided, or omitted, and additional components may be added as required. As a specific example, processor 340 may be divided into multiple processors, such as one or more central processing units (CPUs) and one or more graphics processing units (GPUs). In another example, transceiver 310 may include any number of transceivers and signal processing chains, and may be connected to any number of antennas. In addition, although Figure 3 The UE 116 is shown configured as a mobile phone or smart phone, but the UE may be configured to operate as other types of mobile or stationary devices.

[0075] 4A and 4B illustrate examples of wireless transmit and receive paths 400 and 450, respectively, according to embodiments of the present disclosure. For example, transmit path 400 may be described as being implemented in a gNB (such as gNB 102) and receive path 450 may be described as being implemented in a UE (such as UE 116). However, it should be understood that receive path 450 may be implemented in a gNB and transmit path 400 may be implemented in a UE. It may also be understood that receive path 450 may be implemented in a first UE and transmit path 400 may be implemented in a second UE to support SL communications. In some embodiments, receive path 450 is configured to support broadband operation on an unlicensed SL as described in embodiments of the present disclosure.

[0076] 4A , the transmit path 400 includes a channel coding and modulation block 205, a serial to parallel (S to P) block 410, an inverse fast Fourier transform (IFFT) block of size N 415, a parallel to serial (P to S) block 420, an add cyclic prefix block 425, and an upconverter (UC) 430. The receive path 250 includes a downconverter (DC) 455, a remove cyclic prefix block 460, an S to P block 465, a fast Fourier transform (FFT) block of size N 470, a parallel to serial (P to S) block 475, and a channel decoding and demodulation block 480.

[0077] In the transmit path 400, the channel coding and modulation block 405 receives a set of information bits, applies coding (such as low density parity check (LDPC) coding), and modulates the input bits (such as with quadrature phase shift keying (QPSK) or quadrature amplitude modulation (QAM)) to generate a frequency domain modulation symbol sequence. The serial to parallel block 410 converts (e.g., demultiplexes) the serial modulated symbols into parallel data to generate N parallel symbol streams, where N is the IFFT / FFT size used in the gNB 102 and UE 116. The size-N IFFT block 415 performs an IFFT operation on the N parallel symbol streams to generate a time domain output signal. The parallel to serial block 420 converts (such as multiplexes) the parallel time domain output symbols from the size-N IFFT block 415 to generate a serial time domain signal. The add cyclic prefix block 425 inserts a cyclic prefix into the time domain signal. The up-converter 430 modulates (such as up-converts) the output of the add cyclic prefix block 425 to an RF frequency for transmission via a wireless channel. The signal may also be filtered at baseband before conversion to RF frequency.

[0078] As shown in Fig. 4B, down converter 455 down-converts the received signal to baseband frequency, and removes cyclic prefix block 460 removes cyclic prefix to generate serial time domain baseband signal. Serial to parallel block 465 converts the time domain baseband signal to parallel time domain signal. FFT block 470 of size N performs FFT algorithm to generate N parallel frequency domain signals. (P to S) block 475 converts parallel frequency domain signals to modulated data symbol sequence. Channel decoding and demodulation block 480 demodulates and decodes the modulated symbols to recover the original input data stream.

[0079] Each of gNBs 101-103 may implement a transmit path 400 similar to that for transmitting in the downlink to UEs 111-116 and may implement a receive path 450 similar to that for receiving in the uplink from UEs 111-116. Similarly, each of UEs 111-116 may implement a transmit path 400 for transmitting in the uplink to gNBs 101-103 and may implement a receive path 450 for receiving in the downlink from gNBs 101-103.

[0080] Each component in FIG. 4A and FIG. 4B can be implemented using hardware only or a combination of hardware and software / firmware. As a specific example, at least some of the components in FIG. 4A and FIG. 4B can be implemented in software, while other components can be implemented by configurable hardware or a mixture of software and configurable hardware. For example, FFT block 470 and IFFT block 415 can be implemented as a configurable software algorithm, in which the value of size N can be modified according to the implementation.

[0081] In addition, although described as using FFT and IFFT, this is illustrative only and should not be construed as limiting the scope of the present disclosure. Other types of transforms may be used, such as discrete Fourier transform (DFT) and inverse discrete Fourier transform (IDFT) functions. It should be understood that for DFT and IDFT functions, the value of variable N may be any integer (e.g., 1, 2, 3, 4, etc.), while for FFT and IFFT functions, the value of variable N may be any integer that is a power of two (e.g., 1, 2, 4, 8, 16, etc.).

[0082] Although Figures 4A and 4B illustrate examples of wireless transmit and receive paths 400 and 450, respectively, various changes may be made to Figures 4A and 4B. For example, various components in Figures 4A and 4B may be combined, further subdivided, or omitted, and additional components may be added as needed. In addition, Figures 4A and 4B are intended to illustrate examples of types of transmit and receive paths that may be used in wireless networks. Any other suitable architecture may be used to support wireless communications in a wireless network.

[0083] Embodiments of the present disclosure recognize that, in accordance with Rel-16 NR V2X, transmission and reception of sidelink (SL) signals and channels are based on a resource pool confined within a configured SL bandwidth part (BWP).

[0084] Figure 5 An example architecture 500 for resource pooling according to an embodiment of the present disclosure is shown. For example, any of UEs 111-116 may utilize architecture 500 to perform SL communications. This example is for illustration only, and other embodiments may be used without departing from the scope of the present disclosure.

[0085] refer to Figure 5, in the frequency domain, the resource pool consists of a (pre)configured number (e.g., sl-NumSubchannel) of consecutive subchannels with a starting position (e.g., sl-StartRB-Subchannel) in the frequency domain, where each subchannel includes a set of consecutive resource blocks (RBs) in a time slot with a size (pre)configured by a higher layer parameter (e.g., sl-SubchannelSize). In the time domain, the time slots in the resource pool occur with a period of 10240 ms, and time slots including S-SSB, non-UL time slots and reserved time slots are not applicable to the resource pool. Based on the (pre)configured bitmap (e.g., sl-TimeResource), the set of time slots used for the resource pool is further determined within the remaining time slots.

[0086] The transmission and reception of the Physical Sidelink Shared Channel (PSSCH), Physical Sidelink Control Channel (PSCCH) and Physical Sidelink Feedback Channel (PSFCH) are restricted to and associated with a resource pool, where the parameters are (pre)configured by higher layers (e.g., SL-PSSCH-Config, SL-PSCCH-Config and SL-PSFCH-Config, respectively).

[0087] The UE sends the PSSCH in consecutive symbols within a slot of the resource pool, and the PSSCH resource allocation starts from the second symbol configured for the sidelink (e.g., startSLsymbol+1), and the first symbol configured for the sidelink is copied from the second symbol configured for the sidelink for automatic gain control (AGC) purposes. The UE 116 does not send the PSSCH in symbols not configured for the sidelink, in symbols configured for the PSFCH, in the last symbol configured for the sidelink, or in the symbol immediately before the PSFCH. The frequency domain resource allocation unit for the PSSCH is a subchannel, and the subchannel assignment is determined using the corresponding field in the associated SCI.

[0088] According to Rel-16 NR-U, embodiments of the present disclosure recognize that for operations utilizing shared spectrum channel access (e.g., unlicensed or shared spectrum), a wider carrier (e.g., wideband operation) is supported than the granularity for performing a channel access procedure, where a carrier may include one or more channels, and the channel access procedure is performed on one or more channels. To this end, the concept of RB sets is introduced, and an RB set consists of a continuous number of RBs, and a BWP in a carrier consists of one or more RB sets, with intra-cell guard bands between adjacent RB sets.

[0089] Figure 6An example architecture 600 for RB sets within a wideband carrier according to an embodiment of the present disclosure is shown. For example, any of UEs 111-116 may utilize architecture 600 to perform SL communications. This example is for illustration only, and other embodiments may be used without departing from the scope of the present disclosure.

[0090] For SLs operating on unlicensed spectrum, wideband operation also needs to be supported and relevant resource allocation based on RB sets should be designed.

[0091] Embodiments of the present disclosure focus on wideband operation for SL unlicensed, where a carrier with wideband can span multiple LBT bandwidths (e.g., 20 MHz, or equivalently referred to as channels, where a channel access process is performed before transmission). More specifically, the following aspects are included in the present disclosure: SL BWP in wideband operation; SL resource pool in wideband operation, which includes a SL resource pool based on continuous RBs and a SL resource pool based on interleaved RBs; and S-SSB in wideband operation.

[0092] In one embodiment, the SL BWP may be determined based on the number of RB sets.

[0093] In one example, for a SL carrier with a subcarrier spacing μ, the number of RB sets N RB-set,SL It can be based on the number of guard bands N in the cell RB-set,SL -1 to determine, where each cell has a guard band (eg, with an index of 0≤s≤N RB-set,SL -2) may be based on a starting common RB (CRB) (e.g., represented by ) and the size of the number of CRBs (e.g., indicates) to determine.

[0094] In this example, each RB set (eg, with index 0≤s≤N RB-set,SL -1) has a starting CRB given by (e.g., represented by ) and end CRB (for example, represented by ):

[0095] For s=0

[0096] For 1≤s≤N RB-set，SL -1,

[0097] For s=N RB-set,SL -1, and

[0098] For 0≤s≤N RB-set,SL -2,

[0099] in is the starting CRB of the carrier, and The size of the carrier in terms of the number of CRBs.

[0100] In this example, each RB set (eg, with index 0≤s≤N RB-set,SL -1) can be obtained by Given.

[0101] In another example, the size of the starting CRB and / or the number of CRBs can be configured by higher layer parameters (e.g., Uu link RRC parameters) provided by gNB 102.

[0102] In yet another example, the size of the starting CRB and / or the number of CRBs may be configured by higher layer parameters provided by UE 116 (eg, PC5 RRC parameters).

[0103] In yet another example, the size of the starting CRB and / or the number of CRBs may be provided by pre-configuration.

[0104] In yet another example, when the size of the starting CRB and / or the number of CRBs is not provided, the UE 116 can determine the size of the starting CRB and / or the number of CRBs according to a default mode.

[0105] In yet another example, the boundary of the SL BWP is aligned with the boundary of the RB set included in the SL BWP, for example, such that the lowest RB of the SLBWP is aligned with the lowest RB of the first RB set, and the highest RB of the SL BWP is aligned with the highest RB of the second RB set (for example, the first RB set and the second RB set may or may not be the same). For example, UE 116 expects the SLBWP in the carrier to satisfy

[0106] as well as

[0107] Among them, 0≤s0≤s1≤N RB-set，SL -1.

[0108] In yet another example, the SL BWP includes multiple RB sets and intra-cell guard bands therebetween, for example, such that the lowest RB of the SLBWP is not higher than the lowest RB of the RB set, and the highest RB of the SL BWP is not lower than the highest RB of the RB set. For example, the SL BWP in the desired carrier of the UE 116 satisfies

[0109] as well as

[0110] Among them, 0≤s0≤s1≤NRB-set，SL -1.

[0111] In yet another example, the SL BWP is limited to multiple RB sets and intra-cell guard bands therebetween, e.g., such that the lowest RB of the SL BWP is not lower than the lowest RB of the RB set, and the highest RB of the SL BWP is not higher than the highest RB of the RB set. For example, the SL BWP in the desired carrier by the UE 116 satisfies

[0112] as well as

[0113] Among them, 0≤s0≤s1≤N RB-set，SL -1.

[0114] In yet another example, there is a single SL BWP in the carrier, and s0=0, s1=N RB-set，SL -1.

[0115] In yet another example, the UE 116 expects the SL RB set to be the same as at least one of the UL RB set and the DL RB set.

[0116] In yet another example, the UE 116 desires that the SL RB set does not overlap with at least one of the UL RB set or the DL RB set.

[0117] In one embodiment, for a resource pool based on continuous RBs, the resource pool may be determined based on a set of RBs. In this example of the embodiment, for an SCS given by μ, or refers to the starting RB of the resource pool (e.g., with index i), or refers to the end RB of the resource pool (e.g., with index i), and or refers to the size of the resource pool in RBs (eg, with index i).

[0118] Figure 7 An example architecture 700 of a resource pool based on RB sets according to an embodiment of the present disclosure is shown. For example, any of UEs 111-116 may utilize architecture 700 to perform SL communications. This example is for illustration only, and other embodiments may be used without departing from the scope of the present disclosure.

[0119] In an example ( Figure 7In Example 1 of ), there is a single resource pool in the SL BWP, and the boundary of the single resource pool can be aligned with the boundary of the RB set included in the SLBWP, for example, so that the lowest RB of the resource pool is aligned with the lowest RB of the RB set, and the highest RB of the resource pool is aligned with the highest RB of the RB set. For example, UE 116 expects the resource pool in the BWP to satisfy

[0120] as well as

[0121] Among them, 0≤s0≤s1≤N RB-set，SL -1, for example, the RB set with index s0 corresponds to the lowest RB set in the SL BWP, and the RB set with index s1 corresponds to the highest RB set in the SL BWP. For another example, a single resource pool may be the same as a BWP in the frequency domain. For yet another example, when the resource pool includes RBs from two adjacent RB sets (e.g., the two adjacent RB sets have indices s and s+1), the resource pool may also include RBs from an intra-cell guard band (e.g., the intra-cell guard band has index s) between the adjacent RB sets.

[0122] In another example ( Figure 7 In the example 1 of ), there is a single resource pool in the SL BWP, and the single resource pool may be limited to multiple RB sets included in the SLBWP, for example, so that the lowest RB of the resource pool is not lower than the lowest RB of the RB set, and the highest RB of the resource pool is not higher than the highest RB of the RB set. For example, UE 116 expects the resource pool in the BWP to satisfy

[0123] as well as

[0124] Among them, 0≤s0≤s1≤N RB-set，SL -1, for example, the RB set with index s0 corresponds to the lowest RB set in the SL BWP, and the RB set with index s1 corresponds to the highest RB set in the SL BWP. For another example, a single resource pool may be the same as a BWP in the frequency domain. For yet another example, when the resource pool includes RBs from two adjacent RB sets (e.g., the two adjacent RB sets have indices s and s+1), the resource pool may also include RBs from an intra-cell guard band (e.g., the intra-cell guard band has index s) between the adjacent RB sets.

[0125] In another example ( Figure 7In the description shown in Example 3 of ), there is a single resource pool in the SL BWP, and the single resource pool may include multiple RB sets included in the SLBWP, for example, such that the lowest RB of the resource pool is not higher than the lowest RB of the RB set, and the highest RB of the resource pool is not lower than the highest RB of the RB set. For example, UE 116 expects the resource pool in the BWP to satisfy

[0126] as well as

[0127] Among them, 0≤s0≤s1≤N RB-set，SL -1, for example, the RB set with index s0 corresponds to the lowest RB set in the SL BWP, and the RB set with index s1 corresponds to the highest RB set in the SL BWP. For another example, a single resource pool may be the same as a BWP in the frequency domain. For yet another example, when the resource pool includes RBs from two adjacent RB sets (e.g., the two adjacent RB sets have indices s and s+1), the resource pool may also include RBs from an intra-cell guard band (e.g., the intra-cell guard band has index s) between the adjacent RB sets.

[0128] Figure 8 Another example architecture 800 of a resource pool based on RB sets according to an embodiment of the present disclosure is shown. For example, any of UEs 111-116 may utilize architecture 800 to perform SL communications. This example is for illustration only, and other embodiments may be used without departing from the scope of the present disclosure.

[0129] In an example ( Figure 8 In the description shown in Example 1 of ), there may be one or more resource pools in the SL BWP, and the boundary of each resource pool may be aligned with the boundary of the RB set included in the SLBWP, for example, so that the lowest RB of each resource pool is aligned with the lowest RB of the first RB set, and the highest RB of each resource pool is aligned with the highest RB of the second RB set (for example, the first RB set and the second RB set may be the same or may not be the same). For example, UE 116 expects each resource pool in the BWP to satisfy

[0130] as well as

[0131] Among them, 0≤s0≤s1≤N RB-set，SL-1, for example, both the RB sets with index s0 and the RB sets with index s1 are included in the SL BWP. For another example, when the resource pool includes RBs from two adjacent RB sets (for example, the two adjacent RB sets have indexes s and s+1), the resource pool may also include RBs from an intra-cell guard band (for example, the intra-cell guard band has index s) between the adjacent RB sets.

[0132] In another example ( Figure 8 In the description shown in Example 2 of ), there may be one or more resource pools in the SL BWP, and each resource pool may be limited to multiple RB sets included in the SL BWP, for example, so that the lowest RB of each resource pool is not lower than the lowest RB of the RB set, and the highest RB of each resource pool is not higher than the highest RB of the RB set. For example, UE116 expects each resource pool in the BWP to satisfy

[0133] as well as

[0134] Among them, 0≤s0≤s1≤N RB-set，SL -1, for example, both the RB sets with index s0 and the RB sets with index s1 are included in the SL BWP. For another example, when the resource pool includes RBs from two adjacent RB sets (for example, the two adjacent RB sets have indexes s and s+1), the resource pool may also include RBs from an intra-cell guard band (for example, the intra-cell guard band has index s) between the adjacent RB sets.

[0135] In another example ( Figure 8 In the description shown in Example 2 of ), there may be one or more resource pools in the SL BWP, and each resource pool may include multiple RB sets included in the SLBWP, for example, so that the lowest RB of each resource pool is not higher than the lowest RB of the RB set, and the highest RB of each resource pool is not lower than the highest RB of the RB set. For example, UE 116 expects each resource pool in the BWP to satisfy

[0136] as well as

[0137] Among them, 0≤s0≤s1≤N RB-set，SL -1, for example, both the RB sets with index s0 and the RB sets with index s1 are included in the SL BWP. For another example, when the resource pool includes RBs from two adjacent RB sets (for example, the two adjacent RB sets have indexes s and s+1), the resource pool may also include RBs from an intra-cell guard band (for example, the intra-cell guard band has index s) between the adjacent RB sets.

[0138] In one embodiment, for the example of a resource pool based on an RB set, the spacing between adjacent resource pools in the frequency domain may satisfy the requirement for the minimum value of the guard band within the cell.

[0139] In one embodiment, in addition to the values ​​supported as {10, 12, 15, 20, 25, 75, 100}, there may be additional values ​​supported for the size of the subchannel in units of the number of RBs (e.g., sl-SubchannelSize). In one example, support for additional values ​​may apply to at least one of a contiguous RB-based resource pool and an interleaved RB-based resource pool.

[0140] For an example, the additional value of the size of the subchannel in terms of the number of RBs (eg, sl-SubchannelSize) may be 11.

[0141] For another example, the additional value of the size of the subchannel in units of the number of RBs (eg, sl-SubchannelSize) may be 7.

[0142] Fig. 9 An example architecture 900 for subchannels in a resource pool based on contiguous RBs according to an embodiment of the present disclosure is shown. For example, any of UEs 111-116 may utilize architecture 900 to perform SL communications. This example is for illustration only, and other embodiments may be used without departing from the scope of the present disclosure.

[0143] In one embodiment, for a contiguous RB-based resource pool across multiple RB sets, the intra-cell guard band may overlap with the sub-channels in the resource pool.

[0144] For one example, the subchannels in a resource pool are indexed consecutively from lowest frequency to highest frequency (eg, the lowest subchannel starts from the lowest RB within the resource pool).

[0145] For another example, the subchannels in each RB set are indexed consecutively from the lowest frequency to the highest frequency, and then the RB sets are indexed consecutively from the lowest frequency to the highest frequency.

[0146] For yet another example, each subchannel in the resource pool has the same number of RBs (eg, the number of RBs for each subchannel may be provided by (pre-) configuration).

[0147] For an example, when the channel access process is successful in at least two adjacent RB sets, the RBs in the intra-cell guard band can be used for SL transmission and / or reception (e.g., PSSCH and / or PSCCH), where the intra-cell guard band is an intra-cell guard band associated with at least two adjacent RB sets (e.g., located between at least two adjacent RB sets).

[0148] For another example, when RBs in the intra-cell guard band are not used for SL transmission and / or reception (e.g., due to a failed channel access process or scheduling not to use such RBs), SL transmission and / or reception (e.g., PSSCH or PSCCH) may use RBs in a subchannel, where the subchannel is within the RB set and does not overlap with the intra-cell guard band. For this example, the subchannel overlapping with the intra-cell guard band is not used for SL transmission and / or reception (e.g., PSSCH or PSCCH).

[0149] For another example, a subchannel overlapping with an intra-cell guard band is not used for PSFCH and / or S-SS / PSBCH blocks (e.g., if a PSFCH and / or S-SS / PSBCH block transmission or reception overlaps with a subchannel overlapping with an intra-cell guard band, the PSFCH and / or S-SS / PSBCH block transmission or reception is discarded).

[0150] For another example, RBs in the intra-cell guard band are not used for PSFCH and / or S-SS / PSBCH block transmission, and RBs in subchannels overlapping with the intra-cell guard band but not included in the intra-cell guard band can be used for PSFCH and / or S-SS / PSBCH block transmission.

[0151] Fig.10 Another example architecture 1000 for subchannels in a resource pool based on contiguous RBs according to an embodiment of the present disclosure is shown. For example, any of UEs 111-116 may utilize architecture 1000 to perform SL communications. This example is for illustration only, and other embodiments may be used without departing from the scope of the present disclosure.

[0152] refer to Fig.10 In another embodiment, for a contiguous RB-based resource pool spanning multiple RB sets, subchannels are only included in the RB sets, and no subchannel overlaps with an intra-cell guard band.

[0153] For one example, the last subchannel (eg, having the highest frequency) may have a different RB size than the remaining subchannels in the RB set.

[0154] For another example, each subchannel in the resource pool has the same number of RBs (eg, the number of RBs for each subchannel may be provided by (pre) configuration).

[0155] For one example, the sub-channels in the resource pool are indexed consecutively from the lowest frequency to the highest frequency.

[0156] For another example, the subchannels in each RB set are indexed consecutively from the lowest frequency to the highest frequency, and then the RB sets are indexed consecutively from the lowest frequency to the highest frequency.

[0157] For an example, when the channel access procedure is successful in at least two adjacent RB sets, the RBs in the intra-cell guard band can be used for SL transmission (e.g., PSSCH / PSCCH transmission), wherein the intra-cell guard band is an intra-cell guard band associated with at least two adjacent RB sets (e.g., located between at least two adjacent RB sets). In one instance, those RBs can be used only for PSSCH transmission.

[0158] For another example, when RBs in the intra-cell guard band are not used for SL transmission (e.g., due to a failed channel access process or scheduling not to use such RBs), SL transmission (e.g., PSSCH / PSCCH transmission) can use RBs in the subchannel in the RB set. In one instance, for a subchannel that includes RBs in the intra-cell guard band and also includes RBs in the RB set, RBs overlapping with the intra-cell guard band are not used for SL transmission (e.g., PSSCH / PSCCH transmission), and RBs overlapping with the RB set can be used for SL transmission (e.g., only PSSCH transmission or for both PSSCH and PSCCH transmission).

[0159] For yet another example, only subchannels are used for PSFCH and / or S-SS / PSBCH block transmission, and the intra-cell guard bands are not used for PSFCH and / or S-SS / PSBCH block transmission.

[0160] Fig.11 Another example architecture 1100 for subchannels in a resource pool based on contiguous RBs is shown. For example, any of UEs 111-116 may utilize architecture 1100 to perform SL communications. This example is for illustration only, and other embodiments may be used without departing from the scope of the present disclosure.

[0161] refer to Fig.11 In yet another embodiment for a contiguous RB-based resource pool across multiple RB sets, a subchannel is included in an RB set and an intra-cell guard band, wherein in each RB set and the intra-cell guard band.

[0162] For one example, the last subchannel (eg, having the highest frequency) may have a different RB size than the remaining subchannels in the RB set.

[0163] For another example, the last subchannel (eg, having the highest frequency) may have a different RB size than the remaining subchannels in a guard band within the cell.

[0164] For another example, each subchannel in the resource pool has the same number of RBs.

[0165] For one example, the sub-channels in the resource pool are indexed consecutively from the lowest frequency to the highest frequency.

[0166] For another example, the subchannels in each RB set are indexed consecutively from the lowest frequency to the highest frequency, and then the RB sets are indexed consecutively from the lowest frequency to the highest frequency.

[0167] For yet another example, the subchannels in the guard band within each cell are indexed consecutively from the lowest frequency to the highest frequency, and then the guard bands within the cell are indexed consecutively from the lowest frequency to the highest frequency.

[0168] For an example, when the channel access process is successful in at least two adjacent RB sets, the RBs in the intra-cell guard band can be used for SL transmission (e.g., PSSCH / PSCCH transmission), where the intra-cell guard band is an intra-cell guard band associated with at least two adjacent RB sets (e.g., located between at least two adjacent RB sets).

[0169] For another example, when RBs in a guard band within a cell are not used for SL transmission (e.g., due to a failed channel access process or scheduling not to use such RBs), SL transmission (e.g., PSSCH / PSCCH transmission) can use RBs in a subchannel in the RB set.

[0170] For yet another example, only subchannels in the RB set are used for PSFCH and / or S-SS / PSBCH block transmission, and the intra-cell guard band is not used for PSFCH and / or S-SS / PSBCH block transmission.

[0171] In one embodiment of a resource pool based on interleaved RBs, the resource pool may be determined based on a set of RBs. For example, the resource pool may be a set of subchannels, where the subchannels may be determined based on at least one or more examples described herein.

[0172] Fig.12An example architecture 1200 of an RB set-based interleaved subchannel 1200 according to an embodiment of the present disclosure is shown. For example, any of the UEs 111-116 may utilize the architecture 1200 to perform SL communications. This example is for illustration only, and other embodiments may be used without departing from the scope of the present disclosure.

[0173] In one example, a subchannel may be determined as one or more interlaces, where an interlace includes a set of RBs in a uniformly spaced SL BWP. Fig.12 For example, the index of the subchannel is common across the RB set in the SL BWP, for example, i sub-channel Based on i sub-channel =floor(i interlace / N interlace ) is determined by the interleaving index within the SL BWP given by interlace is the interleaving index within the SL BWP, and is the number of interleavings in the subchannel.

[0174] In another example, a subchannel may be determined as an intersection of a set of RB sets (or a portion of RBs in a set of RB sets) (including associated intra-cell guard bands) and one or more interlaces, where one interlace includes a set of RBs in a uniformly spaced SL BWP. For this example, a subchannel may be determined based on an index of one or more interlaces and an index of a set of RB sets. For one instance, one or more interlaces may be provided by a higher layer parameter or preconfiguration. For another instance, the set of RB sets may be provided by a higher layer parameter or preconfiguration. For yet another instance, the set of RB sets may be a contiguous set of RBs. An illustration of this example is provided in Fig.12 For example, the index of the subchannel is common across one or more RB sets in the SL BWP, for example, i sub-channel Based on i sub-channel =floor(i interlace / N interlace ) is determined by the interleaving index within the SL BWP given by interlace is the interleaving index within the SLBWP, and is the number of interleavings in the subchannel.

[0175] In yet another example, a subchannel may be determined as an intersection of an RB set (or a portion of an RB in an RB set) and one or more interlaces, where an interlace includes a set of RBs in a uniformly spaced SL BWP. For this example, a subchannel may be determined based on an index of one or more interlaces and an index of an RB set. For one example, one or more interlaces may be provided by a higher layer parameter or preconfiguration. For another example, an RB set may be provided by a higher layer parameter or preconfiguration. An illustration of this example is provided in Fig.12 As shown in Example 3. For example, the index of the subchannel can be given by Given, where is the subchannel index in the RB set, i RB-set is the RB set index, and is the number of subchannels in the RB set. For another example, the index of the subchannel can be given by two parts: is the subchannel index within the RB set, and i RB-set is the RB set index. For a further consideration, Corresponding to the same interleaving set in different RB sets, for example, Based on The interleaving index within the given SL BWP is determined, where i interlace is the interleaving index within the SLBWP, and, is the number of interleavings in the subchannel.

[0176] In yet another example, a subchannel may be determined as an intersection of a set of RB sets (or a portion of RBs in a set of RB sets) (excluding associated intra-cell guard bands) and one or more interlaces, wherein one interlace includes a set of RBs with uniform spacing in an SLBWP. For this example, a subchannel may be determined based on an index of one or more interlaces and an index of a set of RB sets. For one instance, one or more interlaces may be provided by a higher layer parameter or preconfiguration. For another instance, the set of RB sets may be provided by a higher layer parameter or preconfiguration. For yet another instance, the set of RB sets may be a contiguous set of RBs.

[0177] In yet another example, at least one of the examples described herein may be supported. For example, if an index of a set of RB sets or an index of an RB set is provided, a subchannel may be determined in a first manner (eg, based on Fig.12 Example 2 or Example 3); if the index of the set of RB sets or the index of the RB set is not provided, the subchannel can be determined in a second manner (for example, according to Fig.12Example 1). For another instance, at least one of the examples described herein may be supported, and which example is supported may be provided by a higher layer parameter or preconfiguration.

[0178] In a further consideration, when the channel access procedure is successful in at least two adjacent RB sets, RBs in an intra-cell guard band may be used for SL transmission and / or reception (e.g., PSSCH and / or PSCCH), wherein the intra-cell guard band is an intra-cell guard band associated with at least two adjacent RB sets (e.g., located between at least two adjacent RB sets). The RBs in the intra-cell guard band are located in the same interlace as the RBs in the RB set used for SL transmission and / or reception (e.g., PSSCH and / or PSCCH).

[0179] In another further consideration, when RBs in the intra-cell guard band are not used for SL transmission and / or reception (e.g., due to a failed channel access procedure or scheduling not to use such RBs), SL transmission and / or reception (e.g., PSSCH and / or PSCCH) may use RBs in subchannels overlapping with a set of RBs for which the channel access procedure succeeds on a channel including the set of RBs. For this example, RBs in subchannels overlapping with the intra-cell guard band are not used for SL transmission and / or reception (e.g., PSSCH and / or PSCCH).

[0180] In yet another further consideration, RBs in subchannels overlapping with the intra-cell guard band are not used for PSFCH and / or S-SS / PSBCH block transmission and / or reception.

[0181] In one example, the resource pool includes RBs in all interlaces that intersect one or more RB sets.

[0182] In another example, the resource pool may include RBs in some or all interlaces that intersect with one or more RB sets. For example, the interlace sets may be provided by higher layer parameters or preconfiguration.

[0183] In one example, if the resource pool includes RBs in an interlace that intersects with the RB set, the resource pool includes all RBs in the interlace that intersects with the RB set. For example, the resource pool may not include a portion of RBs in the interlace that intersects with the RB set.

[0184] In one example, when the interleaved RB based resource pool includes RBs that are interleaved with two adjacent RB sets (e.g., RB sets with indices s and s+1), the interleaved RB based resource pool also includes interleaved RBs that intersect with an intra-cell guard band between the two adjacent RB sets (e.g., an intra-cell guard band with index s).

[0185] In an example ( Figure 8 In the illustration shown in Example 1 of ), there is a single resource pool in the SL BWP, and the resource pool includes all interlaces in the SL BWP, so that the RBs in the resource pool are continuous, and the boundary of the single resource pool can be aligned with the boundary of the RB set included in the SL BWP, for example, so that the lowest RB of the resource pool is aligned with the lowest RB of the RB set, and the highest RB of the resource pool is aligned with the highest RB of the RB set. For example, UE 116 expects the resource pool in the BWP to satisfy

[0186] as well as

[0187] Among them, 0≤s0≤s1≤N RB-set,SL -1, for example, the RB set with index s0 corresponds to the lowest RB set in the SL BWP, and the RB set with index s1 corresponds to the highest RB set in the SL BWP. For another example, a single resource pool may be the same as a BWP in the frequency domain. For yet another example, when the resource pool includes RBs from two adjacent RB sets (e.g., the two adjacent RB sets have indices s and s+1), the resource pool may also include RBs from an intra-cell guard band (e.g., the intra-cell guard band has index s) between the adjacent RB sets.

[0188] In another example ( Figure 8 In the description shown in Example 2 of ), there is a single resource pool in the SL BWP, and the resource pool includes all interlaces in the SLBWP, so that the RBs in the resource pool are continuous, and the single resource pool can be limited to multiple RB sets included in the SLBWP, for example, so that the lowest RB of the resource pool is not lower than the lowest RB of the RB set, and the highest RB of the resource pool is not higher than the highest RB of the RB set. For example, UE 116 expects the resource pool in the BWP to satisfy

[0189] as well as

[0190] Among them, 0≤s0≤s1≤N RB-set，SL -1, for example, the RB set with index s0 corresponds to the lowest RB set in the SL BWP, and the RB set with index s1 corresponds to the highest RB set in the SL BWP. For another example, a single resource pool may be the same as a BWP in the frequency domain. For yet another example, when the resource pool includes RBs from two adjacent RB sets (e.g., the two adjacent RB sets have indices s and s+1), the resource pool may also include RBs from an intra-cell guard band (e.g., the intra-cell guard band has index s) between the adjacent RB sets.

[0191] In another example ( Figure 8 In the description shown in Example 3 of ), there is a single resource pool in the SL BWP, and the resource pool includes all interlaces in the SLBWP, so that the RBs in the resource pool are continuous, and the single resource pool may include multiple RB sets included in the SL BWP, for example, so that the lowest RB of the resource pool is not higher than the lowest RB of the RB set, and the highest RB of the resource pool is not lower than the highest RB of the RB set. For example, UE 116 expects the resource pool in the BWP to satisfy

[0192] as well as

[0193] Among them, 0≤s0≤s1≤N RB-set，SL -1, for example, the RB set with index s0 corresponds to the lowest RB set in the SL BWP, and the RB set with index s1 corresponds to the highest RB set in the SL BWP. For another example, a single resource pool may be the same as a BWP in the frequency domain. For yet another example, when the resource pool includes RBs from two adjacent RB sets (e.g., the two adjacent RB sets have indices s and s+1), the resource pool may also include RBs from an intra-cell guard band (e.g., the intra-cell guard band has index s) between the adjacent RB sets.

[0194] In an example ( Figure 8 In the description shown in Example 1 of ), there may be one or more resource pools in the SL BWP, and each resource pool includes all interlaces in the corresponding RB set, so that the RBs in each resource pool are continuous, and the boundary of each resource pool may be aligned with the boundary of the RB set included in the SLBWP, for example, so that the lowest RB of each resource pool is aligned with the lowest RB of the first RB set, and the highest RB of each resource pool is aligned with the highest RB of the second RB set (for example, the first RB set and the second RB set may be the same or may not be the same). For example, UE 116 expects each resource pool in the BWP to satisfy

[0195] as well as

[0196] Among them, 0≤s0≤s1≤N RB-set，SL -1, for example, both the RB sets with index s0 and the RB sets with index s1 are included in the SL BWP. For another example, when the resource pool includes RBs from two adjacent RB sets (for example, the two adjacent RB sets have indexes s and s+1), the resource pool may also include RBs from an intra-cell guard band (for example, the intra-cell guard band has index s) between the adjacent RB sets.

[0197] In another example ( Figure 8 In the description shown in Example 2 of ), there may be one or more resource pools in the SL BWP, and each resource pool includes all interlaces in the corresponding RB set, so that the RBs in each resource pool are continuous, and each resource pool may be limited to multiple RB sets included in the SLBWP, for example, so that the lowest RB of each resource pool is not lower than the lowest RB of the RB set, and the highest RB of each resource pool is not higher than the highest RB of the RB set. For example, UE 116 expects each resource pool in the BWP to satisfy

[0198] as well as

[0199] Among them, 0≤s0≤s1≤N RB-set，SL -1, for example, both the RB sets with index s0 and the RB sets with index s1 are included in the SL BWP. For another example, when the resource pool includes RBs from two adjacent RB sets (for example, the two adjacent RB sets have indexes s and s+1), the resource pool may also include RBs from an intra-cell guard band (for example, the intra-cell guard band has index s) between the adjacent RB sets.

[0200] In another example ( Figure 8 In the description shown in Example 3 of ), there may be one or more resource pools in the SL BWP, and each resource pool includes all interlaces in the corresponding RB set, so that the RBs in each resource pool are continuous, and each resource pool may include multiple RB sets included in the SLBWP, for example, so that the lowest RB of each resource pool is not higher than the lowest RB of the RB set, and the highest RB of each resource pool is not lower than the highest RB of the RB set. For example, UE 116 expects each resource pool in the BWP to satisfy

[0201] as well as

[0202] Among them, 0≤s0≤s1≤N RB-set，SL -1, for example, both the RB sets with index s0 and the RB sets with index s1 are included in the SL BWP. For another example, when the resource pool includes RBs from two adjacent RB sets (for example, the two adjacent RB sets have indexes s and s+1), the resource pool may also include RBs from an intra-cell guard band (for example, the intra-cell guard band has index s) between the adjacent RB sets.

[0203] Fig.13Another example architecture 1300 for RB set-based resource pooling according to an embodiment of the present disclosure is shown. For example, any of UEs 111-116 may utilize architecture 1300 to perform SL communications. This example is for illustration only, and other embodiments may be used without departing from the scope of the present disclosure.

[0204] In an example ( Fig.13 In the description shown in Example 1 of ), there may be one or more resource pools in the SL BWP, and each resource pool includes an interleaving set in a corresponding RB set (such that the RBs in each resource pool may be continuous or may not be continuous), and the RB set in the resource pool may be given by {m, m+M, ..., m+kM}, where M is a uniform interval of the interleaving, and m determines the index of the interleaving, e.g. in is the starting RB of the SL BWP, and S is the interleaving set. The set of RBs {m, m+M, ..., m+kM} shall be selected between the interval [a, b], where and And 0≤s0≤s1≤N RB-set,SL = -1, for example, both RB sets with index s0 and index s1 are included in the SL BWP. For this example, the resource pool may be determined based on an indication of an interleaving set and a set of RB sets. For one example, the interleaving set may be provided or determined by a higher layer parameter or preconfiguration. For another example, the set of RB sets may be provided by a higher layer parameter or preconfiguration. For a special example of this example, s0 = 0, and s1 = N RB-set,SL -1, for example, the set of RB sets corresponds to all RB sets in the SLBWP. For another example, two resource pools may be IFDM (Interleave frequency division multiplexing) in the SLBWP.

[0205] In another example ( Fig.13 In the description shown in Example 2 of ), there may be one or more resource pools in the SL BWP, and each resource pool includes an interleaving set in a corresponding RB set (such that the RBs in each resource pool may be continuous or may not be continuous), and the RB set in the resource pool may be given by {m, m+M, ..., m+kM}, where M is a uniform interval of the interleaving, and m determines the index of the interleaving, e.g. in is the starting RB of the SL BWP, and S is the interleaving set. The set of RBs {m, m+M..., m+kM} shall be selected between the interval [a, b], where as well as 0≤s0≤s1≤N RB-set,SL = -1, for example, both RB sets with index s0 and index s1 are included in the SL BWP. For this example, the resource pool may be determined based on an indication of an interleaving set and a set of RB sets. For one example, the interleaving set may be provided or determined by a higher layer parameter or preconfiguration. For another example, the set of RB sets may be provided by a higher layer parameter or preconfiguration. For a special example of this example, s0 = 0, and s1 = N RB-set,SL -1, for example, the set of RB sets corresponds to all RB sets in the SL BWP. For yet another example, two resource pools may be IFDMed in the SL BWP.

[0206] In another example ( Fig.13 In the description shown in Example 3 of ), there may be one or more resource pools in the SL BWP, and each resource pool includes an interleaving set in a corresponding RB set (such that the RBs in each resource pool may be continuous or may not be continuous), and the RB set in the resource pool may be given by {m, m+M, ..., m+kM}, where M is a uniform interval of interleaving, and m determines the index of the interleaving, e.g. in is the starting RB of the SL BWP, and S is the interleaving set. The set of RBs {m, m+M, ..., m+kM} shall be selected between the interval [a, b], where as well as 0≤s0≤s1≤N RB-set，SL = -1, for example, the RB set with index s0 and index s1 are both included in the SL BWP. For this example, the resource pool may be determined based on an indication of an interleaving set and a set of RB sets. For one example, the interleaving set may be provided or determined by a higher layer parameter or preconfiguration. For another example, the set of RB sets may be provided by a higher layer parameter or preconfiguration. For a special example of this example, s0 = 0, and s1 = N RB-set，SL -1, for example, the set of RB sets corresponds to all RB sets in the SL BWP. For yet another example, two resource pools may be IFDMed in the SL BWP.

[0207] In one embodiment, sidelink synchronization signals and physical sidelink broadcast channel blocks (S-SS / PSBCH blocks or S-SSBs) may be supported based on RB sets.

[0208] In one example, an interleaving index and an RB set index may be provided to a UE to transmit or receive an S-SS / PSBCH block. For this example, an S-SS / PSBCH block (e.g., having 11 RBs) may be mapped to an RB in the intersection of an interleaving and an RB set.

[0209] For one example, UE 116 does not expect the number of RBs in the intersection of an interlace and a RB set to be less than 11 (eg, 10).

[0210] For another example, if the number of RBs in the intersection of the interlace and the RB set is less than 11, the S-SS / PSBCH block may be truncated by 12 REs and mapped to the RBs in the intersection of the interlace and the RB set.

[0211] For yet another example, if the number of RBs in the intersection of the interlace and the RB set is less than 11, UE 116 selects one RB from the intra-cell guard band and within the same interlace, and maps the 11 RBs of the S-SS / PSBCH block to the RBs in the intersection of the interlace and the RB set and the RBs from the intra-cell guard band.

[0212] In one sub-example, the intra-cell guard band may be an intra-cell guard band that is adjacent to the RB set and has a lower frequency than the RB set (eg, an intra-cell guard band with index s-1 and an RB set with index s).

[0213] In another sub-example, the intra-cell guard band may be an intra-cell guard band that is adjacent to the RB set and has a higher frequency than the RB set (eg, an intra-cell guard band with index s and an RB set with index s).

[0214] In yet another sub-example, the intra-cell guard band may be an intra-cell guard band that is adjacent to the RB set and has a higher frequency than the RB set or has a lower frequency than the RB set.

[0215] In yet another sub-example, the intra-cell guard band may be an intra-cell guard band immediately adjacent to the RB set, having a higher frequency than the RB set or having a lower frequency than the RB set, subject to an indication provided by a higher layer parameter or pre-configuration.

[0216] In one sub-example, when the intra-cell guard band has a lower frequency than the RB set, one RB selected from the intra-cell guard band may be within the range.

[0217] In another sub-example, when the intra-cell guard band has a higher frequency than the RB set, one RB selected from the intra-cell guard band may be within the range.

[0218] In a sub-example, when another RB set adjacent to the intra-cell guard band is also included in the SLBWP, one RB selected from the intra-cell guard band can be used for S-SS / PSBCH block transmission, for example, the RB set configured for S-SS / PSBCH block transmission has an index s. Then, when the RB set with index s-1 is also included in the SL BWP, the intra-cell guard band with index s-1 can be used, or when the RB set with index s+1 is also included in the SL BWP, the intra-cell guard band with index s can be used.

[0219] In another example, one or more interleaving indices and an RB set index may be provided to the UE to transmit or receive an S-SS / PSBCH block. For this example, an S-SS / PSBCH block (e.g., having 11 RBs) may be mapped to an RB in the intersection of an interleaving set and an RB set.

[0220] For one example, UE 116 maps the 11 RBs of the S-SS / PSBCH block to RBs in the intersection of one or more interlaces and RB sets, first in order from lower RBs to higher RBs in each interlace constrained within the RB set, and then in order from lowest interlace to higher interlace in the interlace set.

[0221] For another example, UE 116 maps copies of the 11 RBs of the S-SS / PSBCH block to RBs in the intersection of one or more interlaces and RB sets, first in order of lower RBs to higher RBs in each interlace constrained within the RB set, and then in order of lowest interlace to higher interlace in the interlace set, until all RBs in the intersection of one or more interlaces and RB sets are filled with RBs of the S-SS / PSBCH block (an integer number of 11 RBs may or may not be used).

[0222] In yet another example, an interleaving index and one or more RB set indices may be provided to the UE to transmit or receive an S-SS / PSBCH block. For this example, an S-SS / PSBCH block (e.g., having 11 RBs) may be mapped to an RB in the intersection of an interleaving and a set of RB sets.

[0223] For one example, UE 116 maps the 11 RBs of the S-SS / PSBCH block to RBs in the intersection of one interlace and a set of RB sets (including the intra-cell guard band) in an order from lower RBs to higher RBs in one interlace restricted to the set of RB sets (including the intra-cell guard band).

[0224] For another example, UE 116 maps 11 RBs of the S-SS / PSBCH block to RBs in the intersection of one interlace and at least one RB set from the set of RB sets in order from lower RBs to higher RBs in one interlace restricted within the RB set. For one sub-example, UE 116 may select at least one RB set to transmit, for example, an RB set having 11 RBs in the intersection with the interlace. For another sub-example, if the number of RBs in the intersection of one interlace and at least one RB set from the set of RB sets is less than 11, UE 116 may transmit the S-SS / PSBCH block using RBs in the intersection of one interlace and the guard band within the cell.

[0225] For another example, UE 116 maps copies of 11 RBs of the S-SS / PSBCH block to RBs in the intersection of one interlace and a set of RB sets (including the intra-cell guard band) in order from lower RBs to higher RBs in one interlace restricted within the set of RB sets (including the intra-cell guard band) until all RBs in one interlace restricted within the set of RB sets (including the intra-cell guard band) are filled with RBs of the S-SS / PSBCH block (an integer number of 11 RBs may or may not be used).

[0226] For yet another example, UE 116 maps copies of 11 RBs of the S-SS / PSBCH block to RBs in the intersection of one interlace and a set of RB sets (including intra-cell guard bands), with one copy being mapped to RBs in the intersection of one interlace and each RB set. In a sub-example, if the number of RBs in the intersection of one interlace and RB set is less than 11 RBs, then RBs in the intersection of one interlace and intra-cell guard band will be used for mapping of the S-SS / PSBCH block. In a sub-example, RBs in the intersection of one interlace and intra-cell guard band will also be used for mapping of the S-SS / PSBCH block.

[0227] In yet another example, one interleaving index may be provided to the UE to transmit or receive S-SS / PSBCH blocks.

[0228] For one example, UE 116 does not expect the number of RBs in an interlace to be less than 11 (eg, 10).

[0229] For another example, if the number of RBs in an interlace is less than 11, the S-SS / PSBCH block may be truncated by 12 REs and mapped to the RBs in the interlace.

[0230] In yet another example, one or more interleaving indices may be provided to a UE to transmit or receive an S-SS / PSBCH block.

[0231] For one example, UE 116 maps the 11 RBs of the S-SS / PSBCH block to RBs in one or more interlaces, first in order from lower RBs to higher RBs in each interlace, and then in order from lowest interlace to higher interlace in the interlace set.

[0232] For another example, UE 116 maps copies of the 11 RBs of the S-SS / PSBCH block to RBs in one or more interlaces, first in order of lower RBs to higher RBs in each interlace, and then in order of lowest interlace to higher interlace in the interlace set, until all RBs in one or more interlaces are filled with RBs of the S-SS / PSBCH block (an integer number of 11 RBs may or may not be used).

[0233] Fig.14 An example architecture 1400 for repeated S-SSB transmissions according to various embodiments of the present disclosure is shown. For example, any of UEs 111-116 may utilize architecture 1400 to perform SL communications. This example is for illustration only, and other embodiments may be used without departing from the scope of the present disclosure.

[0234] In one example, an S-SS / PSBCH block (S-SSB) can be in the frequency domain, within a set of RBs (e.g. Fig.14 1401) and / or across multiple RB sets (such as Fig.14 1402) is repeated.

[0235] In one instance of this example, the frequency positions of a (repeating) set of S-SS / PSBCH blocks may be provided by a (pre) configuration (e.g., sl-AbsoluteFrequencySSB-List), wherein the (pre) configuration may include multiple frequency positions (e.g., sl-AbsoluteFrequencySSB) and each frequency position is associated with an S-SS / PSBCH block (e.g., indicating the position of subcarrier #66 in the S-SS / PSBCH block).

[0236] In another instance of this example, when the (pre)configuration (eg, sl-AbsoluteFrequencySSB-List) has a single entry, it implies a legacy S-SS / PSBCH block without repetition.

[0237] In another instance of this example, the entries in the (pre) configuration (e.g., sl-AbsoluteFrequencySSB-List) can be divided into K groups, where K is the number of RB sets used for S-SS / PSBCH transmission, and each group is associated with one RB set. In one sub-instance, each group has only one entry (e.g., each entry corresponds to one RB set). For another sub-instance, the number of entries in the group can be 2. For another sub-instance, the number of entries in the group can be configurable, for example, from 1 to N, and there can be an upper limit on the number of entries in the group, for example, N is 4 for a 30kHz SCS, or N is 8 for a 15kHz SCS.

[0238] In another instance of this example, S-SS / PSBCH block transmissions corresponding to all entries in a group within a (pre) configuration (e.g., sl-AbsoluteFrequencySSB-List) may satisfy the OCB requirements of the corresponding channel including the RB set.

[0239] In another instance of this example, repeated S-SS / PSBCH blocks within and / or across RB sets (e.g., provided by (pre) configuration (e.g., sl-AbsoluteFrequencySSB-List)) share the same in at least one of the following aspects: the same transmission power; the same time domain transmission mode; the same synchronization ID; the same S-SS / PSBCH block index in the same S-SS / PSBCH block transmission instance; the same sequence and mapping for S-PSS; the same sequence and mapping for S-SSS; the same coded bits and rate matching for PSBCH; and the same sequence and mapping of DM-RS for PBCH.

[0240] In another instance of this example, a (pre)configuration of transmission power can be provided to a set of (repeating) S-SS / PSBCH blocks, wherein the (pre)configuration comprises a set of transmission power values ​​and each transmission power value is associated with an S-SS / PSBCH block transmission within the set of (repeating) S-SS / PSBCH blocks.

[0241] In yet another example of this example, UE 116 sends repeated S-SS / PSBCH blocks on the set of RBs for which the channel access procedure was successful.

[0242] In another example of this example, a (pre) configuration including information about S-SS / PSBCH blocks within one RB set may be provided to UE 116, and then UE 116 transmits S-SS / PSBCH blocks on one RB set for which the channel access procedure is successful. For this example, UE 116 may transmit S-SS / PSBCH blocks in other RB sets for which the channel access procedure is successful (e.g., the RB sets are included in the channel for which the channel access procedure is successful).

[0243] In another instance of this example, UE 116 may send repeated S-SS / PSBCH blocks or a subset of repeated S-SS / PSBCH blocks on a set of RB sets for which the channel access procedure was successful (e.g., the RB set is included in the channel for which the channel access procedure was successful).

[0244] For sidelinks operating on unlicensed spectrum, wideband operation also needs to be supported and the associated multi-channel access procedures should be supported.

[0245] Embodiments of the present disclosure also provide for a sidelink unlicensed multi-channel access procedure where a carrier with a wideband spans a multiple of the LBT bandwidth (e.g., 20 MHz). More specifically, the following aspects are included in the present disclosure: a dynamic mode sidelink multi-channel access procedure including both a type A sidelink multi-channel access procedure and a type B sidelink multi-channel access procedure; a semi-static mode sidelink multi-channel access procedure; and an example UE procedure.

[0246] In one embodiment, a multi-channel access procedure may be supported for dynamic mode sidelink operation utilizing shared spectrum channel access.

[0247] In one example, at least one of a first type (e.g., type A) multi-channel access procedure and a second type (e.g., type B) multi-channel access procedure may be supported for dynamic mode sidelink operation utilizing shared spectrum channel access. For one instance, the UE 116 may be indicated whether the first type sidelink multi-channel access procedure and / or the second type sidelink multi-channel access procedure can be supported, for example, configured by higher layer parameters and / or provided by pre-configuration. For another instance, whether it is the first type and / or the second type sidelink, the multi-channel access procedure may be supported, may be one or more UE capabilities, and is reported to the gNB 102.

[0248] Fig.15 An example architecture 1500 for a dynamic mode type A SL multi-channel access procedure according to an embodiment of the present disclosure is shown. For example, the UE 116 can utilize the architecture 1500 to perform SL communications. This example is for illustration only, and other embodiments may be used without departing from the scope of the present disclosure.

[0249] In one embodiment of a Type A side link multi-channel access procedure, a first type of multi-channel access procedure may be supported for dynamic mode side link operation utilizing shared spectrum channel access (eg, a dynamic mode Type A SL multi-channel access procedure).

[0250] For one example, in a dynamic mode type A SL multi-channel access procedure, if the UE intends to transmit on a channel set C (e.g., having resources scheduled or configured or selected for sidelink transmissions including PSSCH / PSCCH transmissions and / or S-SSB transmissions and / or PSFCH transmissions), the UE 116 may transmit on each channel c within the channel set. i Perform the dynamic mode side link single channel access process (for example, c i ∈C), where 0≤i≤I-1, and I is the number of channels in C.

[0251] For another example, the dynamic mode type A side link single channel access procedure 1500 can be a type 1 side link channel access procedure (or type 1 LBT), in which the duration spanned by the sensing time slots sensed as idle before transmission is random, and the number of sensing time slots is based on the number of channels used for channel c. i Counter N i Sure.

[0252] For an example, for channel c i Counter N i Can be generated independently by UE 116.

[0253] For another example, for channel c i Counter N i Can be independently generated by gNB 102 and indicated to UE 116 (e.g., for the case where UE 116 is within the coverage of gNB 102).

[0254] For another example, for channel c i Counter N i The counter N may be common to all channels in C and generated by the UE 116. For one example, a common counter N for all channels may be generated based on the maximum contention window size among all channels. i .

[0255] For another example, for channel c i Counter N i All channels in C may be common, generated by gNB 102, and indicated to UE 116 (e.g., for the case where UE 116 is within the coverage of gNB 102).

[0256] For another example, in a type 1 side link channel access procedure (or type 1 LBT), the contention window size CW i To generate the i Counter N i .

[0257] For an example, for channel c i The competition window size CW i can be adjusted independently by UE 116. For this case, i Any overlapping sidelink transmissions can help adjust the i The competition window size CW i .

[0258] For another example, for channel c i The competition window size CW i Can be independently adjusted by gNB 102 and indicated to UE 116 (e.g., for the case where UE 116 is within the coverage of gNB 102). For this case, the channel c i Any overlapping sidelink transmissions can help adjust the i The competition window size CW i .

[0259] For another example, for channel c i The competition window size CW i The channel ci may be common to all channels in C and adjusted by UE 116. For this example, any sidelink transmissions that overlap with channel ci may contribute to the adjustment for channel c. i The competition window size CW i .

[0260] For another example, for channel c i The competition window size CW i All channels in C may be common, adjusted by gNB 102, and indicated to UE 116 (e.g., for the case where UE 116 is within the coverage of gNB 102). i Any overlapping sidelink transmissions can help adjust the i The competition window size CW i .

[0261] For yet another example, the dynamic mode sidelink single channel access procedure may be a type 2 sidelink channel access procedure (or type 2 LBT), wherein the duration spanned by the sensing slots sensed as idle prior to transmission is deterministic (e.g., 25 μs). For one example, the type 2 sidelink channel access procedure may be used only for sidelink discovery bursts, utilizing potential conditions on duty cycle and / or transmission duration.

[0262] For yet another example, UE 116 may transmit on a channel on which a corresponding sidelink single channel access procedure is successfully performed (e.g., the channel is sensed as idle). This transmission behavior after the multi-channel access procedure is represented as type 1 transmission behavior. For one instance, the channels that UE 116 may transmit may be continuous in the frequency domain (e.g., the indices of the channels are continuous). For another instance, this may be applied when a wideband carrier is provided with an intra-cell guard band configuration (e.g., configured by higher layer parameters and / or provided by pre-configuration). For yet another instance, this may be applied when SL transmission does not use RBs in the intra-cell guard band. For the first sub-instance, SL transmission may be S-SS / PSBCH block transmission; for the second sub-instance, SL transmission may be PSFCH transmission (e.g., where PSFCH transmission does not use RBs in the intra-cell guard band); for the third sub-instance, SL transmission may be PSSCH / PSCCH transmission, where PSSCH / PSCCH transmission does not use RBs in the intra-cell guard band; for the fourth sub-instance, SL transmission may be a combination of the sub-instances described herein.

[0263] For yet another example, when the corresponding sidelink single channel access procedure is successfully performed (e.g., the channel is sensed as idle), the UE 116 may transmit on all channels; and when at least one corresponding sidelink single channel access procedure is not successfully performed (e.g., the channel is sensed as busy), the UE 116 may not transmit on any channel. This transmission behavior after the multi-channel access procedure is represented as type 2 transmission behavior. This may be applicable, for example, when the wideband carrier is not provided with an intra-cell guard band configuration (e.g., configured by a higher layer parameter and / or provided by pre-configuration).

[0264] For yet another example, both type 1 and type 2 transmission behaviors may be supported. In one instance, whether type 1 or type 2 transmission behaviors are supported may be subject to UE capabilities. In another instance, whether type 1 transmission behavior is supported may be subject to UE capabilities. In another instance, whether type 1 or type 2 transmission behaviors are supported may be based on configuration and / or pre-configuration of higher layer parameters. In yet another instance, whether type 1 transmission behavior is supported may be subject to configuration and / or pre-configuration of higher layer parameters. In yet another instance, type 1 transmission behavior is applicable if it can be guaranteed that there are no other RATs sharing the channel (e.g., in a regulation level).

[0265] For yet another example, transmissions on the channels (all or a subset according to examples of the present disclosure) may begin at the same time.

[0266] For yet another example, when UE 116 stops transmitting on any channel, UE 116 may reinitialize the counter N for all channels. i .

[0267] For yet another example, when UE 116 stops transmitting on channel j, UE 116 may reinitialize counter N for channel i≠j i .

[0268] For yet another example, when UE 116 stops transmitting on channel j, UE 116 may resume decrementing counter N for channel i≠j after sensing the channel idle duration. i For an example, the duration may be 4·T sl For another example, this is applicable when other technologies that share the channel cannot be guaranteed on a long-term basis (eg, by regulatory levels).

[0269] For yet another example, the channel frequencies of channel set C may be a subset of the set of channel frequencies supported for sidelink unlicensed operation.

[0270] For yet another example, UE 116 may provide a time interval not exceeding T mcot，i In the period of given duration, on channel c i Send on, where T mcot,i is based on channel c i The corresponding side link single channel access process performed on the channel is determined.

[0271] Fig.16An example architecture 1600 for a dynamic mode type B SL multi-channel access procedure according to an embodiment of the present disclosure is shown. For example, UE 111 can utilize architecture 1600 to perform reception or transmission to UEs 111A-111C on the assigned side link channel. This example is for illustration only, and other embodiments may be used without departing from the scope of the present disclosure.

[0272] In one embodiment of the Type B SL multi-channel access procedure, a second type of multi-channel access procedure may be supported for dynamic mode side link operation utilizing shared spectrum channel access (eg, dynamic mode Type B SL multi-channel access procedure).

[0273] For one example, in the dynamic mode type B SL multi-channel access procedure 1600, if the UE intends to transmit on channel set C (e.g., having resources scheduled or configured or selected for sidelink transmissions, including PSSCFH / PSCCH transmissions and / or S-SSB transmissions and / or PSFCH transmissions), the UE 116 may select (e.g., c i ∈C) in channel c i A first dynamic mode side link single channel access process is performed on C, where 0≤i≤I-1, and I is the number of channels in C, and a set of second dynamic mode side link single channel access processes is performed, where each second dynamic mode side link single channel access process is performed on channel c within the set of channels with j≠i j Execute on.

[0274] For another example, the first dynamic mode side link single channel access procedure may be a type 1 side link channel access procedure (or type 1 LBT), in which the duration spanned by the sensing slots sensed as idle prior to transmission is random, and the number of sensing slots is based on the number of channels used for channel c. i Counter N i Sure.

[0275] For an example, for channel c i Counter N i may be generated by UE 116. For another example, for channel c i Counter N i May be generated by gNB 102 and indicated to UE 116 (e.g., for the case where UE 116 is within the coverage of gNB 102).

[0276] For another example, in a type 1 side link channel access procedure (or type 1 LBT), the contention window size CW i To generate the i Counter N i.

[0277] For an example, for channel c i The competition window size CW i For each channel c i is independently maintained and adjusted by UE 116. For this example, i Any overlapping sidelink transmissions can help adjust the i The competition window size CW i In a further consideration, when for channel c i Generate counter N i When UE 116 selects the maximum value CW among all channels in set C, i .

[0278] For another example, the contention window size CW i The size of the contention window C may be common to all channels in set C and adjusted by UE 116. For this example, any sidelink transmission that overlaps with any channel in set C may contribute to the contention window size CW i adjustments.

[0279] For another example, for channel c i The competition window size CW i For each channel c i is independently maintained and adjusted by gNB 102 and indicated to UE 116 (e.g., for the case where UE 116 is within the coverage of gNB 102). For this example, i Any overlapping sidelink transmissions can help adjust the i The competition window size CW i In a further consideration, when for channel c i Generate counter N i When gNB 102 selects the maximum value CW among all channels in set C, i .

[0280] For another example, the contention window size CW i The channels in set C may be common to all channels in set C, adjusted by gNB 102, and indicated to UE 116 (e.g., for the case where UE 116 is within the coverage of gNB 102). For this example, any sidelink transmission that overlaps with any channel in set C may contribute to the contention window size CW. i adjustments.

[0281] For yet another example, the first dynamic mode sidelink single channel access procedure may be a type 2 sidelink channel access procedure (or type 2 LBT), wherein the duration spanned by the sensing timeslots sensed as idle prior to transmission is deterministic (e.g., 25 μs). For example, the type 2 sidelink channel access procedure may be used only for sidelink discovery bursts, utilizing potential conditions on duty cycle and / or transmission duration.

[0282] For yet another example, the second dynamic mode side link single channel access procedure may be a type 2 side link channel access procedure (or type 2 LBT), in which the duration spanned by the sensing time slot sensed as idle prior to transmission is deterministic (e.g., 25 μs). For one example, in channel c j A Type 2 sidelink channel access procedure (or Type 2 LBT) is performed immediately before uplink transmission.

[0283] For yet another example, the second dynamic mode side link single channel access procedure may be performed only when the first dynamic mode side link single channel access procedure is successful.

[0284] For yet another example, the second dynamic mode side link single channel access procedure may be performed regardless of whether the first dynamic mode side link single channel access procedure is successful.

[0285] For another example, if in channel c i If the first dynamic mode sidelink single channel access procedure is successfully performed on the channel (e.g., a channel sensed as idle), the UE 116 can access the channel c i and if on channel c i The first dynamic mode side link single channel access procedure is successfully performed on the channel c (eg, a channel sensed as idle), and j If the second dynamic mode sidelink single channel access procedure is successfully performed on the channel (e.g., the channel sensed as idle), the UE 116 can access the channel in the c j(j≠i) channels. This transmission behavior after the multi-channel access process is represented as type 1 transmission behavior. For one instance, there may be a further requirement that the set of channels on which UE 116 can transmit (e.g., channel i and all possible channels j) is continuous in the frequency domain (e.g., the indices of the channels are continuous). For another instance, this can be applied when the wideband carrier is provided with an intra-cell protection band configuration (e.g., configured by higher layer parameters and / or provided by pre-configuration). For yet another instance, this can be applied when the SL transmission does not use the RBs in the intra-cell protection band. For the first sub-instance, the SL transmission can be an S-SS / PSBCH block transmission; for the second sub-instance, the SL transmission can be a PSFCH transmission (e.g., where the PSFCH transmission does not use the RBs in the intra-cell protection band); for the third sub-instance, the SL transmission can be a PSSCH / PSCCH transmission, where the PSSCH / PSCCH transmission does not use the RBs in the intra-cell protection band; for the fourth sub-instance, the SL transmission can be a combination of the sub-instances described herein.

[0286] For another example, if in channel c i If the first dynamic mode sidelink single channel access procedure is successfully performed on the channel (e.g., a channel sensed as idle), the UE 116 can access the channel c i and if on channel c i The first dynamic mode side link single channel access procedure is successfully performed on the channel c (eg, a channel sensed as idle), and j If the second dynamic mode sidelink single channel access procedure is successfully performed on the channel (e.g., the channel sensed as idle), the UE 116 can access the channel c j (j≠i); when the first dynamic sidelink single channel access procedure or any second dynamic sidelink single channel access procedure is not successfully performed (for example, the channel is sensed as busy), UE 116 may not transmit on any channel. This transmission behavior after the multi-channel access procedure is represented as type 2 transmission behavior. For example, this can be applied when the wideband carrier is not provided with an intra-cell guard band configuration (for example, configured by a higher layer parameter and / or provided by pre-configuration).

[0287] For yet another example, both type 1 and type 2 transmission behaviors may be supported. In one instance, whether type 1 or type 2 transmission behavior is supported may depend on UE capabilities. In another instance, whether type 1 transmission behavior is supported may be subject to UE capabilities. In another instance, whether type 1 or type 2 transmission behavior is supported may be based on configuration and / or pre-configuration by higher layer parameters. In yet another instance, whether type 1 transmission behavior is supported may be subject to configuration and / or pre-configuration by higher layer parameters. In yet another instance, type 1 transmission behavior is applicable (e.g., in a regulatory level) if it can be guaranteed that there are no other RATs sharing the channel.

[0288] For yet another example, transmissions on the channels (all or a subset according to examples of the present disclosure) may begin at the same time.

[0289] For yet another example, when UE 116 stops channel c i UE 116 may reinitialize the transmission on channel c i Counter N i .

[0290] For yet another example, the channel frequencies of channel set C may be a subset of the set of channel frequencies supported for sidelink unlicensed operation.

[0291] For yet another example, UE 116 may provide a time interval not exceeding T mcot，j In the period of given duration, on channel c j (j≠i), where T mcot，j is based on channel c i The corresponding side link single channel access process performed on the channel is determined.

[0292] For another example, channel c i can be uniformly and randomly selected by UE 116 from a set of channels C. For one example, channel c i The selection may be no more frequent than a predefined threshold, for example, once every 1 second.

[0293] For another example, channel c i The channel c may be indicated by the gNB 102, for example, by a higher layer parameter configuration and / or provided by pre-configuration. i The indication may be no more frequent than a predefined threshold, for example once every 1 second.

[0294] In one embodiment, for semi-static mode sidelink operation with shared spectrum channel access, multiple channel access procedures may be supported.

[0295] Fig.17An example architecture 1700 for a semi-static mode SL multi-channel access procedure according to an embodiment of the present disclosure is shown. For example, any of UEs 111-116 may utilize architecture 1700 to perform SL communications. This example is for illustration only, and other embodiments may be used without departing from the scope of the present disclosure.

[0296] In one example, for sidelink operation with shared spectrum channel access, at least one of semi-static and dynamic mode channel access procedures may be supported. For one instance, whether the semi-static and / or dynamic mode sidelink channel access procedures can be supported may be indicated to the UE 116, e.g., configured by higher layer parameters and / or provided by pre-configuration. For another instance, whether the semi-static and / or dynamic mode sidelink channel access procedures can be supported may be one or more UE capabilities and reported to the gNB 102.

[0297] For example, in the semi-static mode SL multi-channel access process 1700, if the UE intends to transmit on channel set C (e.g., using a scheduled or configured sidelink transmission), the UE 116 may select a channel within the channel set (e.g., c i ∈C) for each channel c i A semi-static mode sidelink single channel access procedure is performed on , where 0≤i≤I-1, and I is the number of channels in C.

[0298] For another example, each channel c i The semi-static mode side link single channel access procedure on the UE may be a sensing duration with a deterministic value performed immediately before the start of the channel occupancy time (e.g., at the end of the idle period of the semi-static mode channel access), where, for example, the deterministic value may be T sl .

[0299] For yet another example, each channel c i The semi-static mode sidelink single channel access procedure on the UE may be a sensing duration with a deterministic value performed immediately before a transmission within the channel occupancy time, wherein, for example, if the gap between the transmission and the previous transmission is greater than a predefined threshold (e.g., 16us), the deterministic value may be T sl .

[0300] For yet another example, if the gap between a transmission and a previous transmission is not greater than a predefined threshold (eg, 16 us), each channel c i The semi-static mode sidelink single channel access procedure on may not be sensing performed immediately prior to transmission within the channel occupancy time.

[0301] For yet another example, UE 116 may transmit on a channel on which a corresponding sidelink single channel access procedure is successfully performed (e.g., the channel is sensed as idle). This transmission behavior after the multi-channel access procedure is represented as type 1 transmission behavior. For one instance, the channels that UE 116 may transmit may be continuous in the frequency domain (e.g., the indices of the channels are continuous). For another instance, this may be applied when a wideband carrier is provided with an intra-cell guard band configuration (e.g., configured by higher layer parameters and / or provided by pre-configuration). For yet another instance, this may be applied when SL transmission does not use RBs in the intra-cell guard band. For the first sub-instance, SL transmission may be S-SS / PSBCH block transmission; for the second sub-instance, SL transmission may be PSFCH transmission (e.g., where PSFCH transmission does not use RBs in the intra-cell guard band); for the third sub-instance, SL transmission may be PSSCH / PSCCH transmission, where PSSCH / PSCCH transmission does not use RBs in the intra-cell guard band; for the fourth sub-instance, SL transmission may be a combination of the sub-instances described herein.

[0302] For yet another example, when the corresponding sidelink single channel access procedure is successfully performed (e.g., the channel is sensed as idle), the UE 116 may transmit on all channels; and when at least one corresponding sidelink single channel access procedure is not successfully performed (e.g., the channel is sensed as busy), the UE 116 may not transmit on any channel. This transmission behavior after the multi-channel access procedure is represented as type 2 transmission behavior. This may be applied, for example, when the wideband carrier is not provided with an intra-cell guard band configuration (e.g., configured by a higher layer parameter and / or provided by pre-configuration).

[0303] For yet another example, both type 1 and type 2 transmission behaviors may be supported. In one instance, whether type 1 or type 2 transmission behaviors are supported may be subject to UE capabilities. In another instance, whether type 1 transmission behavior is supported may be subject to UE capabilities. In another instance, whether type 1 or type 2 transmission behaviors are supported may be based on configuration and / or pre-configuration of higher layer parameters. In yet another instance, whether type 1 transmission behavior is supported may be subject to configuration and / or pre-configuration of higher layer parameters. In yet another instance, type 1 transmission behavior is applicable (e.g., in a regulatory level) if it can be guaranteed that there are no other RATs sharing the channel.

[0304] For yet another example, transmissions on the channels (all or a subset according to examples of the present disclosure) may begin at the same time.

[0305] For yet another example, the channel frequencies of channel set C may be a subset of the set of channel frequencies supported for sidelink unlicensed operation.

[0306] For yet another example, the UE 116 assumes that the channel occupancy start position and / or the duration of channel occupancy on all channels are the same.

[0307] Fig.18 An example of a flowchart of a method 1800 for a UE process for a SL multi-channel access process is shown. For example, the method 1800 may be Figure 3 The UE 116 performs. This example is for illustration only, and other embodiments may be used without departing from the scope of the present disclosure.

[0308] In one embodiment, Fig.18 An example UE process for sidelink multi-channel access is shown in FIG. In this example, according to an example of the present disclosure, the UE determines to transmit on a channel set (1801), and the UE 111 determines the type of the sidelink multi-channel access process (1802). If the determined sidelink multi-channel access process is a type A sidelink multi-channel access process, the UE 111 transmits on each channel c in the channel set. i Type 1 side link channel access procedure (1803) is performed on the channel c, and if the corresponding side link channel access procedure is successfully performed, i If the determined sidelink multi-channel access procedure is a type B sidelink multi-channel access procedure, UE 111 selects a channel c in the channel set. i Type 1 sidelink channel access procedure (1805) is performed on the channel, and all other channels c in the channel set j (e.g., j≠i) performs a type 2 sidelink channel access procedure (1806). If the corresponding sidelink channel access procedure is successfully performed, UE 111 is on channel c i Send (1807) on, and if the channel c is successfully executed i and c j 111 on the sidelink channel access process on channel c j (e.g., j≠i) is sent (1808).

[0309] In one embodiment, the UE may report the channel access procedure failure to higher layers.

[0310] In one example, when a channel access procedure fails, the UE 116 can report whether a single channel access procedure or a multi-channel access procedure was used.

[0311] In another example, for the dynamic multi-channel access procedure, when the multi-channel access procedure fails, the UE 116 can report which type (eg, Type A and / or Type B) of dynamic multi-channel access procedure is performed.

[0312] In yet another example, for a type B dynamic multi-channel access procedure, when the multi-channel access procedure fails, UE 116 may report which channel was used to perform the first dynamic mode sidelink single channel access procedure (e.g., channel c) when the type B dynamic multi-channel access procedure was performed. i ), executed on failure.

[0313] In yet another example, for a single channel access procedure, when the multi-channel access procedure fails, the UE 116 may skip reporting which type (eg, Type A and / or Type B) of the multi-channel access procedure was performed.

[0314] In yet another example, for a multi-channel access procedure, when a channel access procedure fails, the UE 116 may report which mode (eg, dynamic mode and / or semi-static mode) of the channel access procedure is performed.

[0315] In yet another example, for a single channel access procedure, when the channel access procedure fails, the UE 116 may skip reporting which mode (eg, dynamic mode and / or semi-static mode) of the channel access procedure is performed.

[0316] In yet another example, for a multiple channel access procedure, when a channel access procedure fails, the UE 116 can report which type (eg, type 1 and / or type 2) of transmission behavior was used.

[0317] In yet another example, for a single channel access procedure, when the channel access procedure fails, the UE 116 can skip reporting which type (eg, type 1 and / or type 2) of transmission behavior is used.

[0318] In yet another example, for a multiple channel access procedure, the UE 116 can report the channel (eg, or the RB set when the RB set is provided) for which the channel access procedure failed.

[0319] For a sub-example, there may be a bitmap in the report, and each bit in the bitmap corresponds to a channel (or set of RBs).

[0320] For one example, a bit in the bitmap with a value of 1 indicates that the corresponding channel (or RB set) has a failed channel access procedure.

[0321] For another example, a bit in the bitmap with a value of 0 indicates that the corresponding channel (or RB set) has a failed channel access procedure.

[0322] For one example, the bitmap has a length of L, where L is the number of channels (or RB sets) in the SL BWP.

[0323] For another example, the bitmap has a length of L, where L is the number of channels (or RB sets) in the SL resource pool.

[0324] For one example, the bitmap may be applicable to at least a Type A dynamic multi-channel access procedure.

[0325] For one example, the bitmap may be applicable to at least a semi-static multi-channel access procedure.

[0326] For another sub-example, there may be a set of channel indices in the report.

[0327] In yet another example, for a multi-channel access procedure, the UE 116 can report on which channel (eg, or which RB set when RB sets are provided) the channel access procedure was successful.

[0328] For a sub-example, there may be a bitmap in the report, and each bit in the bitmap corresponds to a channel (or set of RBs).

[0329] For one example, a bit in the bitmap with a value of 1 indicates that the corresponding channel (or RB set) has a successful channel access procedure.

[0330] For another example, a bit in the bitmap with a value of 0 indicates that the corresponding channel (or RB set) has a successful channel access procedure.

[0331] For one example, the bitmap has a length of L, where L is the number of channels (or RB sets) in the SL BWP.

[0332] For another example, the bitmap has a length of L, where L is the number of channels (or RB sets) in the SL resource pool.

[0333] For one example, the bitmap may be applicable to at least a Type A dynamic multi-channel access procedure.

[0334] For one example, the bitmap may be applicable to at least a semi-static multi-channel access procedure.

[0335] For another sub-example, there may be a set of channel indices in the report.

[0336] For an example, if type 2 transmission behavior is supported, then for type A dynamic multi-channel access procedure, the UE may report all channels in the multi-channel access procedure as failed in the report.

[0337] For another example, if type 2 transmission behavior is supported, then for type A dynamic multi-channel access procedures, the UE may report a set of channels in a multi-channel access procedure as failed in a report, where the set of channels has a failed single channel access procedure. For example, although the UE 116 cannot transmit on any channel, according to the type 2 transmission behavior, the UE 116 may not need to report a channel access failure on a channel where a single channel access procedure succeeded.

[0338] For an example, if type 2 transmission behavior is supported, then for type B dynamic multi-channel access procedure, the UE may report all channels in the multi-channel access procedure as failed in the report.

[0339] For another example, if type 2 transmission behavior is supported, then for type B dynamic multi-channel access procedure, the UE may report only channel c i Reported as failed (where the first dynamic mode side link single channel access process is on channel c i executed on and failed).

[0340] For another example, if type 2 transmission behavior is supported, then for type B dynamic multi-channel access procedures, the UE may report a set of channels in a multi-channel access procedure as failed in a report, where the set of channels has a failed single channel access procedure. For example, although the UE 116 cannot transmit on any channel, according to the type 2 transmission behavior, the UE 116 may not need to report a channel access failure on a channel where a single channel access procedure succeeded.

[0341] For another example, if type 2 transmission behavior is supported, then for type B dynamic multi-channel access procedure, if on channel c i If a first dynamic mode sidelink single channel access procedure is performed on the UE 116 and fails, the UE 116 may report all channels in the multi-channel access procedure as failures in the report.

[0342] For another example, if type 2 transmission behavior is supported, then for type B dynamic multi-channel access procedure, if on channel c i If the first dynamic mode sidelink single channel access procedure is performed on the UE 116 and succeeds, the UE 116 may report the channel set in the multi-channel access procedure as failed in the report, where the channel set has a failed single channel access procedure. For example, although the UE 116 cannot transmit on any channel, according to the type 2 transmission behavior, the UE 116 may not need to report a channel access failure on the channel where the single channel access procedure succeeded.

[0343] For an example, if type 2 transmission behavior is supported, for the semi-static multi-channel access procedure, the UE may report all channels in the multi-channel access procedure as failed in the report.

[0344] For another example, if type 2 transmission behavior is supported, then for a semi-static multi-channel access procedure, the UE may report a set of channels in a multi-channel access procedure as failed in a report, where the set of channels has a failed single-channel access procedure. For example, although the UE 116 cannot transmit on any channel, according to the type 2 transmission behavior, the UE 116 may not need to report a channel access failure on a channel where a single-channel access procedure succeeded.

[0345] For an example, if Type 1 transmission behavior is supported, then for a Type A dynamic multi-channel access procedure, the UE may report a channel set in a multi-channel access procedure as failed in a report, where the channel set has a failed single channel access procedure.

[0346] For another example, if type 1 transmission behavior is supported, then for type B dynamic multi-channel access procedure, the UE may report only channel c i Reported as failed (where the first dynamic mode side link single channel access process is on channel c i executed on and failed).

[0347] For another example, if type 1 transmission behavior is supported, then for type B dynamic multi-channel access procedures, the UE may report a set of channels in a multi-channel access procedure as failed in a report, where the set of channels has a failed single channel access procedure. For example, although the UE 116 cannot transmit on any channel, according to type 2 transmission behavior, the UE 116 may not need to report a channel access failure on a channel where a single channel access procedure succeeded.

[0348] For another example, if type 1 transmission behavior is supported, then for type B dynamic multi-channel access procedure, if on channel c i If a first dynamic mode sidelink single channel access procedure is performed on the UE 116 and fails, the UE 116 may report all channels in the multi-channel access procedure as failures in the report.

[0349] For another example, if type 1 transmission behavior is supported, then for type B dynamic multi-channel access procedure, if on channel c iIf the first dynamic mode sidelink single channel access procedure is performed on the UE 116 and succeeds, the UE 116 may report the channel set in the multi-channel access procedure as failed in the report, where the channel set has a failed single channel access procedure. For example, although the UE 116 cannot transmit on any channel, according to the type 2 transmission behavior, the UE 116 may not need to report a channel access failure on the channel where the single channel access procedure succeeded.

[0350] For yet another example, if type 1 transmission behavior is supported, then for a semi-static multi-channel access procedure, the UE may report a channel set in the multi-channel access procedure as failed in a report, where the channel set has a failed single channel access procedure.

[0351] The above process illustrates an example method that can be implemented according to the principles of the present disclosure, and various changes can be made to the method shown in the flow chart herein. For example, although shown as a series of steps, the various steps in each figure can overlap, occur in parallel, occur in different orders, or occur multiple times. In another example, a step can be omitted or replaced by another step.

[0352] Although the present disclosure has been described with exemplary embodiments, various changes and modifications may be suggested to those skilled in the art. The present disclosure is intended to cover these changes and modifications that fall within the scope of the appended claims. The description in this application should not be interpreted as implying that any particular element, step or function is an essential element that must be included in the scope of the claims. The scope of the patent subject matter is defined by the claims.

Claims

1. A user equipment (UE) in a wireless communication system, the UE comprising: The processor is configured as: Determine the side link (SL) bandwidth part (BWP); Determining a set of resource block sets (RB sets) and a set of intra-cell guard bands between the sets of RB sets; determining a resource pool based on the set of RB sets, wherein a lowest RB of the resource pool is aligned with a lowest RB of the first RB set, and a highest RB of the resource pool is aligned with a highest RB of the second RB set; Determining a sub-channel set based on the resource pool; Determining transmission of a physical SL shared channel (PSSCH) based on the set of subchannels; and Performing the SL channel access procedure; and A transceiver, operably coupled to the processor, the transceiver being configured to perform transmission of the PSSCH after successfully performing a SL channel access procedure.

2. The UE according to claim 1, wherein: A subchannel in the subchannel set is determined as an intersection between an RB set from the set of RB sets and an interleaving set, An interlace in an interlace set includes multiple RBs in a SL BWP with uniform spacing, and The transmission of PSSCH includes multiple subchannels in a subchannel set, and The plurality of subchannels are located in a set of the RB sets.

3. The UE according to claim 2, wherein: The subchannel is indexed by Given, where i interlace is the interleaving index within the SL BWP, and is the number of interlaces in the interlace set.

4. The UE according to claim 2, wherein: When the plurality of subchannels are located in a plurality of RB sets in the set of RB sets, the transmission of the PSSCH further includes RBs in a plurality of intra-cell guard bands in the intra-cell guard band set, The plurality of intra-cell guard bands are located between the plurality of RB sets, and The SL channel access procedure is successfully performed on the multiple RB sets.

5. The UE according to claim 1, wherein: The SL channel access procedure is one of the type A SL channel access procedure and the type BSL channel access procedure.

6. The UE according to claim 5, wherein: The Type ASL channel access procedure includes a Type 1SL channel access procedure on each channel in the channel set. The channel set corresponds to a set of the RB sets including subchannels for PSSCH transmission, and The type B SL channel access procedure includes a set of type 1 SL channel access procedures on a first channel in a channel set and type 2 SL channel access procedures on the remaining channels in the channel set, and The channel set corresponds to a set of the RB sets including subchannels used for PSSCH transmission.

7. The UE according to claim 6, wherein: A Type 1 SL channel access procedure comprises a first duration spanned by a sensing slot which is sensed to be idle prior to transmission, The first duration is random, and Each type 2 channel access procedure in the set of type 2 SL channel access procedures comprises a second time duration spanned by a sensing time slot, the sensing time slot being sensed as idle prior to transmission, and The second duration is deterministic and is 25 microseconds.

8. A method performed by a user equipment (UE) in a wireless communication system, the method comprising: Determine the side link (SL) bandwidth part (BWP); Determining a set of resource block sets (RB sets) and a set of intra-cell guard bands between the sets of RB sets; determining a resource pool based on the set of RB sets, wherein a lowest RB of the resource pool is aligned with a lowest RB of the first RB set, and a highest RB of the resource pool is aligned with a highest RB of the second RB set; Determining a sub-channel set based on the resource pool; Determining transmission of a physical SL shared channel (PSSCH) based on a set of subchannels; Performing SL channel access procedure; and Transmission of PSSCH is performed after successful execution of the SL channel access procedure.

9. The method according to claim 8, wherein: A subchannel in the subchannel set is determined as an intersection between an RB set from the set of RB sets and an interleaving set, An interlace in an interlace set includes multiple RBs in a SL BWP with uniform spacing, and The transmission of PSSCH includes multiple subchannels in a subchannel set, and The plurality of subchannels are located in a set of the RB sets.

10. The method according to claim 9, wherein: The subchannel is indexed by Given, where i interlace is the interleaving index within the SL BWP, and is the number of interlaces in the interlace set.

11. The method according to claim 9, wherein: When the plurality of subchannels are located in a plurality of RB sets in the set of RB sets, the transmission of the PSSCH further includes RBs in a plurality of intra-cell guard bands in the intra-cell guard band set, The plurality of intra-cell guard bands are located between the plurality of RB sets, and The SL channel access procedure is successfully performed on the multiple RB sets.

12. The method according to claim 8, wherein: The SL channel access procedure is one of the type ASL channel access procedure and the type B SL channel access procedure.

13. The method according to claim 12, wherein: The Type ASL channel access procedure includes a Type 1SL channel access procedure on each channel in the channel set. The channel set corresponds to a set of the RB sets including subchannels for PSSCH transmission, and The type B SL channel access procedure includes a set of type 1 SL channel access procedures on a first channel in a channel set and type 2 SL channel access procedures on the remaining channels in the channel set, and The channel set corresponds to a set of the RB sets including subchannels used for PSSCH transmission.

14. The method according to claim 13, wherein: A Type 1 SL channel access procedure comprises a first duration spanned by a sensing slot which is sensed to be idle prior to transmission, and The first duration is random.

15. The method of claim 13, wherein: each type 2 SL channel access procedure in the set of type 2 SL channel access procedures comprises a second time duration spanned by a sensing time slot, the sensing time slot being sensed as idle prior to transmission, and The second duration is deterministic and is 25 microseconds.

Images