WO2023008845A1 - Procédé et appareil de partage d'occupation de canal d'ue avec liaison latérale - Google Patents

Procédé et appareil de partage d'occupation de canal d'ue avec liaison latérale Download PDF

Info

Publication number
WO2023008845A1
WO2023008845A1 PCT/KR2022/010801 KR2022010801W WO2023008845A1 WO 2023008845 A1 WO2023008845 A1 WO 2023008845A1 KR 2022010801 W KR2022010801 W KR 2022010801W WO 2023008845 A1 WO2023008845 A1 WO 2023008845A1
Authority
WO
WIPO (PCT)
Prior art keywords
transmission
sidelink
channel
access procedure
channel access
Prior art date
Application number
PCT/KR2022/010801
Other languages
English (en)
Inventor
Hongbo Si
Emad N. Farag
Original Assignee
Samsung Electronics Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US17/812,707 external-priority patent/US20240023085A1/en
Application filed by Samsung Electronics Co., Ltd. filed Critical Samsung Electronics Co., Ltd.
Priority to EP22849821.8A priority Critical patent/EP4356681A1/fr
Priority to KR1020247007145A priority patent/KR20240039034A/ko
Priority to CN202280047860.3A priority patent/CN117598011A/zh
Publication of WO2023008845A1 publication Critical patent/WO2023008845A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H04W74/0816—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision avoidance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/40—Resource management for direct mode communication, e.g. D2D or sidelink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices

Definitions

  • the present disclosure relates generally to wireless communication systems and, more specifically, the present disclosure relates to user equipment (UE) channel occupancy sharing with a sidelink (SL) in a wireless communication system.
  • UE user equipment
  • SL sidelink
  • 5G mobile communication technologies define broad frequency bands such that high transmission rates and new services are possible, and can be implemented not only in “Sub 6GHz” bands such as 3.5GHz, but also in “Above 6GHz” bands referred to as mmWave including 28GHz and 39GHz.
  • 6G mobile communication technologies referred to as Beyond 5G systems
  • THz terahertz
  • IIoT Industrial Internet of Things
  • IAB Integrated Access and Backhaul
  • DAPS Dual Active Protocol Stack
  • 5G baseline architecture for example, service based architecture or service based interface
  • NFV Network Functions Virtualization
  • SDN Software-Defined Networking
  • MEC Mobile Edge Computing
  • multi-antenna transmission technologies such as Full Dimensional MIMO (FD-MIMO), array antennas and large-scale antennas, metamaterial-based lenses and antennas for improving coverage of terahertz band signals, high-dimensional space multiplexing technology using OAM (Orbital Angular Momentum), and RIS (Reconfigurable Intelligent Surface), but also full-duplex technology for increasing frequency efficiency of 6G mobile communication technologies and improving system networks, AI-based communication technology for implementing system optimization by utilizing satellites and AI (Artificial Intelligence) from the design stage and internalizing end-to-end AI support functions, and next-generation distributed computing technology for implementing services at levels of complexity exceeding the limit of UE operation capability by utilizing ultra-high-performance communication and computing resources.
  • FD-MIMO Full Dimensional MIMO
  • OAM Organic Angular Momentum
  • RIS Reconfigurable Intelligent Surface
  • 5th generation (5G) or new radio (NR) mobile communications is recently gathering increased momentum with all the worldwide technical activities on the various candidate technologies from industry and academia.
  • the candidate enablers for the 5G/NR mobile communications include massive antenna technologies, from legacy cellular frequency bands up to high frequencies, to provide beamforming gain and support increased capacity, new waveform (e.g., a new radio access technology (RAT)) to flexibly accommodate various services/applications with different requirements, new multiple access schemes to support massive connections, and so on.
  • RAT new radio access technology
  • the present disclosure relates to wireless communication systems and, more specifically, the present disclosure relates to UE channel occupancy sharing with a SL in a wireless communication system.
  • a UE in a wireless communication system includes a processor configured to perform a channel access procedure to initiate a channel occupancy on a channel with shared spectrum channel access and determine that the channel occupancy is to be shared with at least one other UE.
  • the UE further includes a transceiver operably coupled to the processor. The transceiver is configured to transmit a first sidelink transmission within the channel occupancy and receive, from the at least one other UE, a second sidelink transmission within the channel occupancy after transmitting the first sidelink transmission.
  • a method of a UE in a wireless communication system includes performing a channel access procedure to initiate a channel occupancy on a channel with shared spectrum channel access and determining that the channel occupancy is to be shared with at least one other UE.
  • the method further includes transmitting a first sidelink transmission within the channel occupancy and receiving, from the at least one other UE, a second sidelink transmission within the channel occupancy after transmitting the first sidelink transmission within the channel occupancy.
  • Couple and its derivatives refer to any direct or indirect communication between two or more elements, whether or not those elements are in physical contact with one another.
  • transmit and “communicate,” as well as derivatives thereof, encompass both direct and indirect communication.
  • the term “or” is inclusive, meaning and/or.
  • controller means any device, system, or part thereof that controls at least one operation. Such a controller may be implemented in hardware or a combination of hardware and software and/or firmware. The functionality associated with any particular controller may be centralized or distributed, whether locally or remotely.
  • phrases "at least one of,” when used with a list of items, means that different combinations of one or more of the listed items may be used, and only one item in the list may be needed.
  • “at least one of: A, B, and C” includes any of the following combinations: A, B, C, A and B, A and C, B and C, and A and B and C.
  • various functions described below can be implemented or supported by one or more computer programs, each of which is formed from computer readable program code and embodied in a computer readable medium.
  • application and “program” refer to one or more computer programs, software components, sets of instructions, procedures, functions, objects, classes, instances, related data, or a portion thereof adapted for implementation in a suitable computer readable program code.
  • computer readable program code includes any type of computer code, including source code, object code, and executable code.
  • computer readable medium includes any type of medium capable of being accessed by a computer, such as read only memory (ROM), random access memory (RAM), a hard disk drive, a compact disc (CD), a digital video disc (DVD), or any other type of memory.
  • ROM read only memory
  • RAM random access memory
  • CD compact disc
  • DVD digital video disc
  • a "non-transitory” computer readable medium excludes wired, wireless, optical, or other communication links that transport transitory electrical or other signals.
  • a non-transitory computer readable medium includes media where data can be permanently stored and media where data can be stored and later overwritten, such as a rewritable optical disc or an erasable memory device.
  • aspects of the present disclosure provide efficient communication methods in a wireless communication system.
  • FIGURE 1 illustrates an example of wireless network according to various embodiments of the present disclosure
  • FIGURE 2 illustrates an example of gNB according to various embodiments of the present disclosure
  • FIGURE 3 illustrates an example of UE according to various embodiments of the present disclosure
  • FIGURES 4 and 5 illustrate an example of wireless transmit and receive paths according to various embodiments of the present disclosure
  • FIGURE 6 illustrates an example of Type 1 downlink (DL)/uplink (UL) channel access procedure according to various embodiments of the present disclosure
  • FIGURE 7 illustrates an example of channel occupancy (CO) sharing between two UEs with SL transmissions only according to various embodiments of the present disclosure
  • FIGURE 8 illustrates an example of CO sharing among multiple UEs with the same initiating device according to various embodiments of the present disclosure
  • FIGURE 9 illustrates an example of CO sharing among multiple UEs with the different initiating devices according to various embodiments of the present disclosure
  • FIGURE 10 illustrates an example of CO sharing between parallel sidelink transmissions according to various embodiments of the present disclosure
  • FIGURE 11 illustrates an example of CO sharing between SL and UL according to various embodiments of the present disclosure
  • FIGURE 12 illustrates an example of CO sharing between SL and DL according to various embodiments of the present disclosure
  • FIGURE 13 illustrates an example of CO sharing among SL, UL, and DL according to various embodiments of the present disclosure
  • FIGURE 14 illustrates an example method for UE channel occupancy sharing with a SL in a wireless communication system according to embodiments of the present disclosure
  • FIGURE 15 illustrates a block diagram illustrating a structure of a UE according to an embodiment of the disclosure.
  • FIGURE 16 illustrates a block diagram illustrating a structure of a base station according to an embodiment of the disclosure.
  • FIGURE 1 through FIGURE 16 discussed below, and the various embodiments used to describe the principles of the present disclosure in this patent document are by way of illustration only and should not be construed in any way to limit the scope of the present disclosure. Those skilled in the art will understand that the principles of the present disclosure may be implemented in any suitably arranged system or device.
  • 3GPP TS 38.211 v.16.6.0 “Physical channels and modulation”
  • 3GPP TS 38.212 v.16.6.0 “Multiplexing and channel coding”
  • 3GPP TS 38.213 v16.6.0 “NR; Physical Layer Procedures for Control”
  • 3GPP TS 38.214: v.16.6.0 “Physical layer procedures for data”
  • 3GPP TS 38.331 v.16.5.0 “Radio Resource Control (RRC) protocol specification.”
  • RRC Radio Resource Control
  • FIGURES 1-3 describe various embodiments implemented in wireless communications systems and with the use of orthogonal frequency division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA) communication techniques.
  • OFDM orthogonal frequency division multiplexing
  • OFDMA orthogonal frequency division multiple access
  • FIGURE 1 illustrates an example of wireless network according to embodiments of the present disclosure.
  • the embodiment of the wireless network shown in FIGURE 1 is for illustration only. Other embodiments of the wireless network 100 could be used without departing from the scope of this present disclosure.
  • the wireless network includes a gNB 101 (e.g., base station, BS), a gNB 102, and a gNB 103.
  • the gNB 101 communicates with the gNB 102 and the gNB 103.
  • the gNB 101 also communicates with at least one network 130, such as the Internet, a proprietary Internet Protocol (IP) network, or other data network.
  • IP Internet Protocol
  • the gNB 102 provides wireless broadband access to the network 130 for a first plurality of UEs within a coverage area 120 of the gNB 102.
  • the first plurality of UEs includes a UE 111, which may be located in a small business; a UE 112, which may be located in an enterprise (E); a UE 113, which may be located in a WiFi hotspot (HS); a UE 114, which may be located in a first residence (R); a UE 115, which may be located in a second residence (R); and a UE 116, which may be a mobile device (M), such as a cell phone, a wireless laptop, a wireless PDA, or the like.
  • M mobile device
  • the gNB 103 provides wireless broadband access to the network 130 for a second plurality of UEs within a coverage area 125 of the gNB 103.
  • the second plurality of UEs includes the UE 115 and the UE 116.
  • a UE 116 may communicate with another UE 115 via a sidelink (SL).
  • SL sidelink
  • both UEs 115-116 can be within network coverage (of the same or different base stations).
  • the UE 116 may be within network coverage and the other UE may be outside network coverage (e.g., UEs 111A-111C).
  • both UE are outside network coverage.
  • one or more of the gNBs 101-103 may communicate with each other and with the UEs 111-116 using 5G/NR, LTE, LTE-A, WiMAX, WiFi, or other wireless communication techniques.
  • the term “base station” or “BS” can refer to any component (or collection of components) configured to provide wireless access to a network, such as transmit point (TP), transmit-receive point (TRP), an enhanced base station (eNodeB or eNB), a 5G/NR base station (gNB), a macrocell, a femtocell, a WiFi access point (AP), or other wirelessly enabled devices.
  • TP transmit point
  • TRP transmit-receive point
  • eNodeB or eNB enhanced base station
  • gNB 5G/NR base station
  • macrocell a macrocell
  • femtocell a femtocell
  • WiFi access point AP
  • Base stations may provide wireless access in accordance with one or more wireless communication protocols, e.g., 5G/NR 3rd generation partnership project (3GPP) NR, long term evolution (LTE), LTE advanced (LTE-A), high speed packet access (HSPA), Wi-Fi 802.11a/b/g/n/ac, etc.
  • 3GPP 3rd generation partnership project
  • LTE long term evolution
  • LTE-A LTE advanced
  • HSPA high speed packet access
  • Wi-Fi 802.11a/b/g/n/ac Wi-Fi 802.11a/b/g/n/ac
  • the term “user equipment” or “UE” can refer to any component such as “mobile station,” “subscriber station,” “remote terminal,” “wireless terminal,” “receive point,” or “user device.”
  • the terms “user equipment” and “UE” are used in this patent document to refer to remote wireless equipment that wirelessly accesses a BS, whether the UE is a mobile device (such as a mobile telephone or smartphone) or is normally considered a stationary device (such as a desktop computer or vending machine).
  • Dotted lines show the approximate extents of the coverage areas 120 and 125, which are shown as approximately circular for the purposes of illustration and explanation only. It should be clearly understood that the coverage areas associated with gNBs, such as the coverage areas 120 and 125, may have other shapes, including irregular shapes, depending upon the configuration of the gNBs and variations in the radio environment associated with natural and man-made obstructions.
  • one or more of the UEs 111-116 include circuitry, programing, or a combination thereof, for a UE's channel occupancy sharing with a SL in a wireless communication system.
  • one or more of the gNBs 101-103 includes circuitry, programing, or a combination thereof, for a UE's channel occupancy sharing with a SL in a wireless communication system.
  • FIGURE 1 illustrates one example of a wireless network
  • the wireless network could include any number of gNBs and any number of UEs in any suitable arrangement.
  • the gNB 101 could communicate directly with any number of UEs (e.g., via a Uu interface or air interface, which is an interface between a UE and 5G radio access network (RAN)) and provide those UEs with wireless broadband access to the network 130.
  • each gNB 102-103 could communicate directly with the network 130 and provide UEs with direct wireless broadband access to the network 130.
  • the gNBs 101, 102, and/or 103 could provide access to other or additional external networks, such as external telephone networks or other types of data networks.
  • the wireless network 100 may have communications facilitated via one or more devices (e.g., UE 111A to 111C) that may have a SL communication with the UE 111.
  • the UE 111 can communicate directly with the UEs 111A to 111C through a set of SLs (e.g., SL interfaces) to provide sideline communication, for example, in situations where the UEs 111A to 111C are remotely located or otherwise in need of facilitation for network access connections (e.g., BS 102) beyond or in addition to traditional fronthaul and/or backhaul connections/interfaces.
  • SLs e.g., SL interfaces
  • the UE 111 can have direct communication, through the SL communication, with UEs 111A to 111C with or without support by the BS 102.
  • Various of the UEs e.g., as depicted by UEs 112 to 116) may be capable of one or more communication with their other UEs (such as UEs 111A to 111C as for UE 111).
  • FIGURE 2 illustrates an example of gNB 102 according to embodiments of the present disclosure.
  • the embodiment of the gNB 102 illustrated in FIGURE 2 is for illustration only, and the gNBs 101 and 103 of FIGURE 1 could have the same or similar configuration.
  • gNBs come in a wide variety of configurations, and FIGURE 2 does not limit the scope of this present disclosure to any particular implementation of a gNB.
  • the gNB 102 includes multiple antennas 205a-205n, multiple RF transceivers 210a-210n, transmit (TX) processing circuitry 215, and receive (RX) processing circuitry 220.
  • the gNB 102 also includes a controller/processor 225, a memory 230, and a backhaul or network interface 235.
  • the RF transceivers 210a-210n receive, from the antennas 205a-205n, incoming RF signals, such as signals transmitted by UEs in the network 100.
  • the RF transceivers 210a-210n down-convert the incoming RF signals to generate IF or baseband signals.
  • the IF or baseband signals are sent to the RX processing circuitry 220, which generates processed baseband signals by filtering, decoding, and/or digitizing the baseband or IF signals.
  • the RX processing circuitry 220 transmits the processed baseband signals to the controller/processor 225 for further processing.
  • the TX processing circuitry 215 receives analog or digital data (such as voice data, web data, e-mail, or interactive video game data) from the controller/processor 225.
  • the TX processing circuitry 215 encodes, multiplexes, and/or digitizes the outgoing baseband data to generate processed baseband or IF signals.
  • the RF transceivers 210a-210n receive the outgoing processed baseband or IF signals from the TX processing circuitry 215 and up-converts the baseband or IF signals to RF signals that are transmitted via the antennas 205a-205n.
  • the controller/processor 225 can include one or more processors or other processing devices that control the overall operation of the gNB 102.
  • the controller/processor 225 could control the reception of uplink channel signals and the transmission of downlink channel signals by the RF transceivers 210a-210n, the RX processing circuitry 220, and the TX processing circuitry 215 in accordance with well-known principles.
  • the controller/processor 225 could support additional functions as well, such as more advanced wireless communication functions.
  • the controller/processor 225 could support beam forming or directional routing operations in which outgoing/incoming signals from/to multiple antennas 205a-205n are weighted differently to effectively steer the outgoing signals in a desired direction. Any of a wide variety of other functions could be supported in the gNB 102 by the controller/processor 225.
  • the controller/processor 225 is also capable of executing programs and other processes resident in the memory 230, such as an OS.
  • the controller/processor 225 can move data into or out of the memory 230 as required by an executing process.
  • the controller/processor 225 is also coupled to the backhaul or network interface 235.
  • the backhaul or network interface 235 allows the gNB 102 to communicate with other devices or systems over a backhaul connection or over a network.
  • the interface 235 could support communications over any suitable wired or wireless connection(s).
  • the gNB 102 is implemented as part of a cellular communication system (such as one supporting 5G/NR, LTE, or LTE-A)
  • the interface 235 could allow the gNB 102 to communicate with other gNBs over a wired or wireless backhaul connection.
  • the interface 235 could allow the gNB 102 to communicate over a wired or wireless local area network or over a wired or wireless connection to a larger network (such as the Internet).
  • the interface 235 includes any suitable structure supporting communications over a wired or wireless connection, such as an Ethernet or RF transceiver.
  • the memory 230 is coupled to the controller/processor 225. Part of the memory 230 could include a RAM, and another part of the memory 230 could include a Flash memory or other ROM.
  • FIGURE 2 illustrates one example of gNB 102
  • the gNB 102 could include any number of each component shown in FIGURE 2.
  • an access point could include a number of interfaces 235, and the controller/processor 225 could support a UE's channel occupancy sharing with a SL in a wireless communication system.
  • the gNB 102 while shown as including a single instance of TX processing circuitry 215 and a single instance of RX processing circuitry 220, the gNB 102 could include multiple instances of each (such as one per RF transceiver).
  • various components in FIGURE 2 could be combined, further subdivided, or omitted and additional components could be added according to particular needs.
  • FIGURE 3 illustrates an example of UE 116 according to embodiments of the present disclosure.
  • the embodiment of the UE 116 illustrated in FIGURE 3 is for illustration only, and the UEs 111-115 of FIGURE 1 could have the same or similar configuration.
  • UEs come in a wide variety of configurations, and FIGURE 3 does not limit the scope of this present disclosure to any particular implementation of a UE.
  • the UE 116 includes an antenna 305, a radio frequency (RF) transceiver 310, TX processing circuitry 315, a microphone 320, and receive (RX) processing circuitry 325.
  • the UE 116 also includes a speaker 330, a processor 340, an input/output (I/O) interface (IF) 345, a touchscreen 350, a display 355, and a memory 360.
  • the memory 360 includes an operating system (OS) 361 and one or more applications 362.
  • the RF transceiver 310 receives, from the antenna 305, an incoming RF signal transmitted by a gNB of the network 100 or by other UEs (e.g., one or more of UEs 111-115) on a SL channel.
  • the RF transceiver 310 down-converts the incoming RF signal to generate an intermediate frequency (IF) or baseband signal.
  • the IF or baseband signal is sent to the RX processing circuitry 325, which generates a processed baseband signal by filtering, decoding, and/or digitizing the baseband or IF signal.
  • the RX processing circuitry 325 transmits the processed baseband signal to the speaker 330 (such as for voice data) or to the processor 340 for further processing (such as for web browsing data).
  • the TX processing circuitry 315 receives analog or digital voice data from the microphone 320 or other outgoing baseband data (such as web data, e-mail, or interactive video game data) from the processor 340.
  • the TX processing circuitry 315 encodes, multiplexes, and/or digitizes the outgoing baseband data to generate a processed baseband or IF signal.
  • the RF transceiver 310 receives the outgoing processed baseband or IF signal from the TX processing circuitry 315 and up-converts the baseband or IF signal to an RF signal that is transmitted via the antenna 305.
  • the processor 340 can include one or more processors or other processing devices and execute the OS 361 stored in the memory 360 in order to control the overall operation of the UE 116.
  • the processor 340 could control the reception of downlink and/or sidelink channel signals and the transmission of uplink and/or sidelink channel signals by the RF transceiver 310, the RX processing circuitry 325, and the TX processing circuitry 315 in accordance with well-known principles.
  • the processor 340 includes at least one microprocessor or microcontroller.
  • the processor 340 is also capable of executing other processes and programs resident in the memory 360, such as processes for a UE's channel occupancy sharing with a SL in a wireless communication system.
  • the processor 340 can move data into or out of the memory 360 as required by an executing process.
  • the processor 340 is configured to execute the applications 362 based on the OS 361 or in response to signals received from gNBs or an operator.
  • the processor 340 is also coupled to the I/O interface 345, which provides the UE 116 with the ability to connect to other devices, such as laptop computers and handheld computers.
  • the I/O interface 345 is the communication path between these accessories and the processor 340.
  • the processor 340 is also coupled to the touchscreen 350 and the display 355.
  • the operator of the UE 116 can use the touchscreen 350 to enter data into the UE 116.
  • the display 355 may be a liquid crystal display, light emitting diode display, or other display capable of rendering text and/or at least limited graphics, such as from web sites.
  • the memory 360 is coupled to the processor 340.
  • Part of the memory 360 could include a random-access memory (RAM), and another part of the memory 360 could include a Flash memory or other read-only memory (ROM).
  • RAM random-access memory
  • ROM read-only memory
  • FIGURE 3 illustrates one example of UE 116
  • various changes may be made to FIGURE 3.
  • various components in FIGURE 3 could be combined, further subdivided, or omitted and additional components could be added according to particular needs.
  • the processor 340 could be divided into multiple processors, such as one or more central processing units (CPUs) and one or more graphics processing units (GPUs).
  • FIGURE 3 illustrates the UE 116 configured as a mobile telephone or smartphone, UEs could be configured to operate as other types of mobile or stationary devices.
  • 5G/NR communication systems To meet the demand for wireless data traffic having increased since deployment of 4G communication systems and to enable various vertical applications, 5G/NR communication systems have been developed and are currently being deployed.
  • the 5G/NR communication system is considered to be implemented in higher frequency (mmWave) bands, e.g., 28 GHz or 60GHz bands, so as to accomplish higher data rates or in lower frequency bands, such as 6 GHz, to enable robust coverage and mobility support.
  • mmWave mmWave
  • 6 GHz lower frequency bands
  • the beamforming, massive multiple-input multiple-output (MIMO), full dimensional MIMO (FD-MIMO), array antenna, an analog beam forming, large scale antenna techniques are discussed in 5G/NR communication systems.
  • RANs cloud radio access networks
  • D2D device-to-device
  • wireless backhaul moving network
  • CoMP coordinated multi-points
  • 5G systems and frequency bands associated therewith are for reference as certain embodiments of the present disclosure may be implemented in 5G systems.
  • the present disclosure is not limited to 5G systems, or the frequency bands associated therewith, and embodiments of the present disclosure may be utilized in connection with any frequency band.
  • aspects of the present disclosure may also be applied to deployment of 5G communication systems, 6G or even later releases which may use terahertz (THz) bands.
  • THz terahertz
  • a communication system includes a downlink (DL) that refers to transmissions from a base station or one or more transmission points to UEs and an uplink (UL) that refers to transmissions from UEs to a base station or to one or more reception points and a sidelink (SL) that refers to transmissions from one or more UEs to one or more UEs.
  • DL downlink
  • UL uplink
  • SL sidelink
  • a time unit for DL signaling or for UL signaling on a cell is referred to as a slot and can include one or more symbols.
  • a symbol can also serve as an additional time unit.
  • a frequency (or bandwidth (BW)) unit is referred to as a resource block (RB).
  • One RB includes a number of sub-carriers (SCs).
  • SCs sub-carriers
  • a slot can have duration of 0.5 milliseconds or 1 millisecond, include 14 symbols and an RB can include 12 SCs with inter-SC spacing of 30 KHz or 15 KHz, and so on.
  • DL signals include data signals conveying information content, control signals conveying DL control information (DCI), and reference signals (RS) that are also known as pilot signals.
  • a gNB transmits data information or DCI through respective physical DL shared channels (PDSCHs) or physical DL control channels (PDCCHs).
  • PDSCHs physical DL shared channels
  • PDCCHs physical DL control channels
  • a PDSCH or a PDCCH can be transmitted over a variable number of slot symbols including one slot symbol.
  • a DCI format scheduling a PDSCH reception by a UE is referred to as a DL DCI format
  • PUSCH physical uplink shared channel
  • a gNB transmits one or more of multiple types of RS including channel state information RS (CSI-RS) and demodulation RS (DMRS).
  • CSI-RS is primarily intended for UEs to perform measurements and provide CSI to a gNB.
  • NZP CSI-RS non-zero power CSI-RS
  • IMRs interference measurement reports
  • a CSI process includes NZP CSI-RS and CSI-IM resources.
  • a UE can determine CSI-RS transmission parameters through DL control signaling or higher layer signaling, such as radio resource control (RRC) signaling, from a gNB. Transmission instances of a CSI-RS can be indicated by DL control signaling or be configured by higher layer signaling.
  • RRC radio resource control
  • a DMRS is transmitted only in the BW of a respective PDCCH or PDSCH and a UE can use the DMRS to demodulate data or control information.
  • FIGURE 4 and FIGURE 5 illustrate examples of wireless transmit and receive paths according to this present disclosure.
  • a transmit path 400 may be described as being implemented in a gNB (such as the gNB 102), while a receive path 500 may be described as being implemented in a UE (such as a UE 116).
  • the receive path 500 can be implemented in a gNB and that the transmit path 400 can be implemented in a UE.
  • the receive path 500 can be implemented in a first UE and that the transmit path 400 can be implemented in a second UE to support SL communications.
  • the receive path 500 is configured to support SL measurements in V2X communication as described in embodiments of the present disclosure.
  • the transmit path 400 as illustrated in FIGURE 4 includes a channel coding and modulation block 405, a serial-to-parallel (S-to-P) block 410, a size N inverse fast Fourier transform (IFFT) block 415, a parallel-to-serial (P-to-S) block 420, an add cyclic prefix block 425, and an up-converter (UC) 430.
  • S-to-P serial-to-parallel
  • IFFT inverse fast Fourier transform
  • P-to-S parallel-to-serial
  • UC up-converter
  • the receive path 500 as illustrated in FIGURE 5 includes a down-converter (DC) 555, a remove cyclic prefix block 560, a serial-to-parallel (S-to-P) block 565, a size N fast Fourier transform (FFT) block 570, a parallel-to-serial (P-to-S) block 575, and a channel decoding and demodulation block 580.
  • DC down-converter
  • S-to-P serial-to-parallel
  • FFT size N fast Fourier transform
  • P-to-S parallel-to-serial
  • the channel coding and modulation block 405 receives a set of information bits, applies coding (such as a 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 sequence of frequency-domain modulation symbols.
  • coding such as a low-density parity check (LDPC) coding
  • modulates the input bits such as with quadrature phase shift keying (QPSK) or quadrature amplitude modulation (QAM) to generate a sequence of frequency-domain modulation symbols.
  • QPSK quadrature phase shift keying
  • QAM quadrature amplitude modulation
  • the serial-to-parallel block 410 converts (such as de-multiplexes) the serial modulated symbols to parallel data in order to generate N parallel symbol streams, where N is the IFFT/FFT size used in the gNB 102 and the UE 116.
  • the size N IFFT block 415 performs an IFFT operation on the N parallel symbol streams to generate time-domain output signals.
  • the parallel-to-serial block 420 converts (such as multiplexes) the parallel time-domain output symbols from the size N IFFT block 415 in order to generate a serial time-domain signal.
  • the add cyclic prefix block 425 inserts a cyclic prefix to 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 the RF frequency.
  • a transmitted RF signal from the gNB 102 arrives at the UE 116 after passing through the wireless channel, and reverse operations to those at the gNB 102 are performed at the UE 116.
  • the down-converter 555 down-converts the received signal to a baseband frequency
  • the remove cyclic prefix block 560 removes the cyclic prefix to generate a serial time-domain baseband signal.
  • the serial-to-parallel block 565 converts the time-domain baseband signal to parallel time domain signals.
  • the size N FFT block 570 performs an FFT algorithm to generate N parallel frequency-domain signals.
  • the parallel-to-serial block 575 converts the parallel frequency-domain signals to a sequence of modulated data symbols.
  • the channel decoding and demodulation block 580 demodulates and decodes the modulated symbols to recover the original input data stream.
  • Each of the gNBs 101-103 may implement a transmit path 400 as illustrated in FIGURE 4 that is analogous to transmitting in the downlink to UEs 111-116 and may implement a receive path 500 as illustrated in FIGURE 5 that is analogous to receiving in the uplink from UEs 111-116.
  • each of UEs 111-116 may implement the transmit path 400 for transmitting in the uplink to the gNBs 101-103 and/or transmitting in the sidelink to another UE and may implement the receive path 500 for receiving in the downlink from the gNBs 101-103 and/or receiving in the sidelink from another UE.
  • FIGURE 4 and FIGURE 5 can be implemented using only hardware or using a combination of hardware and software/firmware.
  • at least some of the components in FIGURES 4 and FIGURE 5 may be implemented in software, while other components may be implemented by configurable hardware or a mixture of software and configurable hardware.
  • the FFT block 570 and the IFFT block 515 may be implemented as configurable software algorithms, where the value of size N may be modified according to the implementation.
  • DFT discrete Fourier transform
  • IDFT inverse discrete Fourier transform
  • N the value of the variable N may be any integer number (such as 1, 2, 3, 4, or the like) for DFT and IDFT functions, while the value of the variable N may be any integer number that is a power of two (such as 1, 2, 4, 8, 16, or the like) for FFT and IFFT functions.
  • FIGURE 4 and FIGURE 5 illustrate examples of wireless transmit and receive paths
  • various changes may be made to FIGURE 4 and FIGURE 5.
  • various components in FIGURE 4 and FIGURE 5 can be combined, further subdivided, or omitted and additional components can be added according to particular needs.
  • FIGURE 4 and FIGURE 5 are meant to illustrate examples of the types of transmit and receive paths that can be used in a wireless network. Any other suitable architectures can be used to support wireless communications in a wireless network.
  • a node In Rel-16 new radio on unlicensed spectrum (NR-U), a node (gNB or UE) can initialize a channel occupancy on an operating channel after performing a channel access procedure, wherein the channel access procedure includes at least one sensing slot and the sensing is based on energy detection.
  • a gNB can initialize a channel occupancy after performing the Type 1 DL channel access procedure
  • a UE can initialize a channel occupancy after performing the Type 1 UL channel access procedure.
  • the time duration spanned by the sensing slots that are sensed to be idle before a transmission is random, and the time duration include a first period (e.g., initial CCA period) consisting of a duration of 16 us and a fixed number (e.g., m p ) of sensing slots, and a second period (e.g., extended CCA period) consisting of a random number (e.g., N) of sensing slots, wherein m p is determined based on the channel access priority class (CAPC) p, and a length of the sensing slot is 9 us, for 5 GHz and 6 GHz unlicensed spectrum.
  • a first period e.g., initial CCA period
  • m p a fixed number
  • extended CCA period e.g., extended CCA period
  • FIGURE 6 illustrates an example of Type 1 DL/UL channel access procedure 600 according to various embodiments of the present disclosure.
  • An embodiment of the Type 1 DL/UL channel access procedure 600 shown in FIGURE 6 is for illustration only.
  • the random number N is an integer generated uniformly between 0 and CW p , and CW p is adjusted between a minimum value CW min,p and a maximum value CW max,p , according to the CAPC as well.
  • the node can occupy the channel for a maximum duration T mcot,p , which is also based on the CAPC.
  • a gNB can share its initialized channel occupancy (CO) with its serving UE(s), wherein the gNB indicates the type of channel access procedure for the UE(s) according to the gap between the DL and UL transmission.
  • CO channel occupancy
  • the CO only includes one switching point between DL and UL transmissions, such that the CO starts with gNB's downlink transmission and proceeds with UE(s)' UL transmission, with a potential gap between the DL and UL transmission.
  • the gNB can indicate the UE a type of channel access procedure based on the duration of the gap.
  • the gNB can indicate the UE a Type 2C UL channel access procedure, wherein the time duration of sensing before the transmission is 0 (i.e., no sensing), and the maximum UL transmission duration subject to this type of channel access procedure is 584 us.
  • the gNB can indicate the UE a Type 2B UL channel access procedure, wherein the time duration including the sensing slot(s) that are sensed to be idle before a transmission is 16 us.
  • the gNB can indicate the UE a Type 2A UL channel access procedure, wherein the time duration including the sensing slot(s) that are sensed to be idle before a transmission is 25 us.
  • the CO can include multiple switching points between DL and UL transmissions, wherein the gap between any transmissions is no larger than 25 us.
  • the gNB can perform a type of channel access procedure based on the duration of the gap between a UL transmission and a DL transmission.
  • the gNB can perform a Type 2C DL channel access procedure, wherein the time duration of sensing before the transmission is 0 (i.e., no sensing), and the maximum DL transmission duration subject to this type of channel access procedure is 584 us.
  • the gNB can perform a Type 2B DL channel access procedure, wherein the time duration including the sensing slot(s) that are sensed to be idle before a transmission is 16 us.
  • the gNB can perform a Type 2A DL channel access procedure, wherein the time duration including the sensing slot(s) that are sensed to be idle before a transmission is 25 us.
  • the gNB can indicate the UE a type of channel access procedure based on the duration of the gap, according to one of Example UL-LBT-1, Example UL-LBT-2, or Example UL-LBT-3.
  • a UE can also share its initialized CO with the gNB, wherein the gNB can determine the type of channel access procedure according to the gap between the UL and DL transmission.
  • the gNB's DL transmission may contain transmission to the UE initializes the CO and can further include non-unicast and/or unicast transmissions where any unicast transmission is only transmitted to the UE initializes the CO.
  • the gap between the UL and DL transmission cannot exceed 25 us, and the gNB can perform a type of channel access procedure based on the duration of the gap, according to one of Example DL-LBT-1, Example DL-LBT-2, or Example DL-LBT-3.
  • the channels on sidelink include physical sidelink shared channel (PSSCH), physical sidelink control channel (PSCCH), and physical sidelink broadcast channel (PSBCH), and the signals on sidelink include sidelink primary synchronization signal (S-PSS), sidelink secondary synchronization signal (S-SSS), de-modulation reference signal (DM-RS), CSI-RS, and phase tracking reference signal (PT-RS).
  • PSSCH physical sidelink shared channel
  • PSCCH physical sidelink control channel
  • PSBCH physical sidelink broadcast channel
  • the signals on sidelink include sidelink primary synchronization signal (S-PSS), sidelink secondary synchronization signal (S-SSS), de-modulation reference signal (DM-RS), CSI-RS, and phase tracking reference signal (PT-RS).
  • S-PSS sidelink primary synchronization signal
  • S-SSS sidelink secondary synchronization signal
  • DM-RS de-modulation reference signal
  • CSI-RS CSI-RS
  • PT-RS phase tracking reference signal
  • a UE can initialize a CO on sidelink or uplink channel and share the CO with other UE(s) or gNB.
  • the present disclosure focuses on the conditions to support CO sharing, wherein the CO is initialized by a UE.
  • the present disclosure focuses on channel occupancy initialized by a UE and shared with other node(s) for downlink, sidelink, and/or uplink transmission(s). More precisely, this disclosure includes the following components: (1) CO sharing with sidelink transmission only, for example, (i) CO sharing between two UEs, (ii) CO sharing among multiple UEs with same initiating device, (iii) CO sharing among multiple UEs with different initiating devices, and (iv) CO sharing among multiple UEs with parallel transmissions; (2) CO sharing between sidelink and uplink; (3) CO sharing between sidelink and downlink; and (4) CO sharing between sidelink, uplink, and downlink.
  • CO sharing with sidelink transmission only for example, (i) CO sharing between two UEs, (ii) CO sharing among multiple UEs with same initiating device, (iii) CO sharing among multiple UEs with different initiating devices, and (iv) CO sharing among multiple UEs with parallel transmissions; (2) CO sharing between sidelink and uplink; (3) CO sharing between sidelink and down
  • Type 1 sidelink channel access procedure the time duration spanned by the sensing slots that are sensed to be idle before a sidelink transmission is random, and this type of channel access procedure can be applicable to any transmission(s) initialized by a UE on sidelink;
  • Type 2A sidelink channel access procedure a UE may transmit a sidelink transmission immediately after sensing the channel to be idle for at least a sensing interval of 25 us;
  • Type 2B sidelink channel access procedure a UE may transmit a sidelink transmission immediately after sensing the channel to be idle for at least a sensing interval of 16 us;
  • Type 2C sidelink channel access procedure a UE may transmit a sidelink transmission immediately without sensing the channel.
  • the duration of the sidelink transmission after performing the Type 2C sidelink channel access procedure is at most 584 us.
  • At least one of the following examples can be utilized by a UE to start a transmission burst within a channel occupancy.
  • a UE may perform the SL transmission(s) on the channel after performing Type 2C SL channel access procedure.
  • a UE may perform the SL transmission(s) on the channel after performing Type 2B SL channel access procedure.
  • a UE may perform the SL transmission(s) on the channel after performing Type 2A SL channel access procedure.
  • the UE may perform the SL transmission(s) on the channel after performing Type 2A SL channel access procedure if the gap is 25 us.
  • the UE can be indicated with a Type 2C SL channel access procedure and may perform the SL transmission(s) on the channel after performing the Type 2C SL channel access procedure.
  • the UE can be indicated with a Type 2B SL channel access procedure and may perform the SL transmission(s) on the channel after performing the Type 2B SL channel access procedure.
  • the UE can be indicated with a Type 2A SL channel access procedure and may perform the SL transmission(s) on the channel after performing the Type 2A SL channel access procedure.
  • the UE can be indicated with a Type 2A SL channel access procedure and may perform the SL transmission(s) on the channel after performing the Type 2A SL channel access procedure if the gap is 25 us.
  • At least one of the following examples can be applicable for a SL transmission burst.
  • the burst of SL transmission can include at least one of PSSCH, PSCCH, PSFCH (e.g., to a particular UE), S-SSB, and their associated RS, and the SL signal(s) and channel(s) in the SL transmission(s) can be multiplexed into a burst with the assumption that any time domain gap within the burst is not larger than a predefined threshold (e.g., 16 us).
  • a predefined threshold e.g. 16 us.
  • the burst of SL transmission can be PSFCH (e.g. to a particular UE) only.
  • the burst of SL transmission can be PSCCH and/or PSSCH transmission.
  • the PSSCH/PSCCH included in the SL transmission burst conveys broadcast information.
  • the PSSCH/PSCCH included in the SL transmission burst conveys groupcast information, wherein the group of UE(s) for the reception of the PSSCH/PSCCH includes a particular UE.
  • the PSSCH/PSCCH included in the SL transmission burst conveys unicast information, wherein the UE for the reception of the PSSCH/PSCCH is a particular UE.
  • the PSSCH/PSCCH included in the SL transmission burst does not convey groupcast information, wherein the group of UE(s) for the reception of the PSSCH/PSCCH does not include a particular UE.
  • the PSSCH/PSCCH included in the SL transmission burst does not convey unicast information, wherein the UE for the reception of the PSSCH/PSCCH is not a particular UE.
  • a UE can perform a channel access procedure to perform transmission(s) including at least one of sidelink or uplink transmission (e.g., sidelink transmission and uplink transmission are IFDMed and mapped to different interlaces in the frequency domain, or sidelink transmission and uplink transmission are TDMed in a burst to make the time domain gap no larger than a predefined threshold, or sidelink transmission and uplink transmission are FDMed into a burst, or sidelink transmission and uplink transmission are CDMed into a burst), and at least one of the following UL/SL channel access procedures can be supported for a transmission burst including SL and/or UL transmission.
  • sidelink or uplink transmission e.g., sidelink transmission and uplink transmission are IFDMed and mapped to different interlaces in the frequency domain, or sidelink transmission and uplink transmission are TDMed in a burst to make the time domain gap no larger than a predefined threshold, or sidelink transmission and uplink transmission are FDMed into a burst, or side
  • whether the UL/SL transmission is multiplexed from at least one of sidelink or uplink transmission using interlace based resource allocation can be a UE capability. In another instance, whether the UL/SL transmission is multiplexed from at least one of sidelink or uplink transmission using interlace based resource allocation can be indicated by the gNB (e.g. using a higher layer parameter, and/or a MAC CE, and/or a DCI format). In yet another instance, whether the UL/SL transmission is multiplexed from at least one of sidelink or uplink transmission using interlace based resource allocation can be indicated by the UE (e.g. using sidelink RRC parameter, and/or a SCI format). In yet another instance, whether the UL/SL transmission is multiplexed from at least one of sidelink or uplink transmission using interlace based resource allocation can be indicated by a pre-configuration (e.g. associated with the resource pool).
  • a pre-configuration e.g. associated with the resource pool
  • Type 1 UL/SL channel access procedure the time duration spanned by the sensing slots that are sensed to be idle before a sidelink transmission is random, and this type of channel access procedure can be applicable to any UL/SL transmission(s) initialized by a UE.
  • a UE may transmit a sidelink transmission immediately after sensing the channel to be idle for at least a sensing interval of 25 us.
  • a UE may transmit a sidelink transmission immediately after sensing the channel to be idle for at least a sensing interval of 16 us.
  • a UE may transmit a sidelink transmission immediately without sensing the channel.
  • the duration of the sidelink transmission after performing the Type 2A UL/SL channel access procedure is at most 584 us.
  • At least one of the following examples can be utilized by a UE to start a UL/SL multiplexed transmission burst (e.g., IFDMed, FDMed, TDMed, or CDMed) within a channel occupancy.
  • a UL/SL multiplexed transmission burst e.g., IFDMed, FDMed, TDMed, or CDMed
  • a UE may perform the UL/SL transmission(s) on the channel after performing Type 2C UL/SL channel access procedure.
  • a UE may perform the UL/SL transmission(s) on the channel after performing Type 2B UL/SL channel access procedure.
  • a UE may perform the UL/SL transmission(s) on the channel after performing Type 2A UL/SL channel access procedure.
  • the UE may perform the UL/SL transmission(s) on the channel after performing Type UL/2A SL channel access procedure if the gap is 25 us.
  • the UE can be indicated with a Type 2C UL/SL channel access procedure and may perform the SL transmission(s) on the channel after performing the Type 2C UL/SL channel access procedure.
  • the UE can be indicated with a Type 2B UL/SL channel access procedure and may perform the UL/SL transmission(s) on the channel after performing the Type 2B UL/SL channel access procedure.
  • the UE can be indicated with a Type 2A UL/SL channel access procedure and may perform the UL/SL transmission(s) on the channel after performing the Type 2A UL/SL channel access procedure.
  • the UE can be indicated with a Type 2A UL/SL channel access procedure and may perform the UL/SL transmission(s) on the channel after performing the Type 2A UL/SL channel access procedure if the gap is 25 us.
  • At least one of the following examples can be applicable for a UL/SL multiplexed transmission burst (e.g., IFDMed, FDMed, TDMed, or CDMed).
  • a UL/SL multiplexed transmission burst e.g., IFDMed, FDMed, TDMed, or CDMed.
  • the burst of UL/SL transmission can be multiplexed into a burst with the assumption that any time domain gap within the burst is not larger than a predefined threshold (e.g., 16 us).
  • a predefined threshold e.g. 16 us
  • the PSSCH/PSCCH included in the SL transmission within the UL/SL burst conveys broadcast information.
  • the PSSCH/PSCCH included in the SL transmission within the UL/SL burst conveys groupcast information, wherein the group of UE(s) for the reception of the PSSCH/PSCCH includes a particular UE.
  • the PSSCH/PSCCH included in the SL transmission within the UL/SL burst conveys unicast information, wherein the UE for the reception of the PSSCH/PSCCH is a particular UE.
  • the PSSCH/PSCCH included in the SL transmission within the UL/SL burst does not convey groupcast information, wherein the group of UE(s) for the reception of the PSSCH/PSCCH does not include a particular UE.
  • the PSSCH/PSCCH included in the SL transmission within the UL/SL burst does not convey unicast information, wherein the UE for the reception of the PSSCH/PSCCH is not a particular UE.
  • a first UE e.g., UE-1
  • UE-2 can initialize a channel occupancy for sidelink transmission(s) and share with a second UE (UE-2) for sidelink transmission(s).
  • the UE-1 performs a Type 1 SL channel access procedure to initialize the CO.
  • FIGURE 7 illustrates an example of CO sharing between two UEs with SL transmissions only 700 according to various embodiments of the present disclosure.
  • An embodiment of the CO sharing between two UEs with SL transmissions only 700 shown in FIGURE 7 is for illustration only.
  • the UE-1 initializes the channel occupancy on sidelink and performs SL transmission(s) to UE-2 (e.g., 701), and UE-2 shares the channel occupancy initialized by UE-1 to perform SL transmission(s) (e.g., 702).
  • FIGURE 7 e.g., (A)
  • the UE-1 initializes the channel occupancy on sidelink and performs SL transmission(s) to UE-2 (e.g., 703), and UE-2 shares the channel occupancy initialized by UE-1 to perform SL transmission(s) (e.g., 704), and then UE-1 continues to perform SL transmission(s) in the CO after the transmission of UE-2 (e.g., 705).
  • FIGURE 7 e.g., (B)
  • the UE-1 initializes the channel occupancy on sidelink and performs SL transmission(s) to UE-2 (e.g., 706), and UE-2 shares the channel occupancy initialized by UE-1 to perform SL transmission(s) (e.g., 707), and UE-1 continues to perform SL transmission(s) in the CO after the transmission of UE-2 (e.g., 708), and then UE-2 further shares the CO to perform SL transmission(s) after the transmission of UE-1 (e.g., 709).
  • FIGURE 7 e.g., (C)
  • At most one switch on the transmitter of the SL transmission(s) is allowed (e.g., only single switching point between the sidelink transmission bursts from the UE-1 perspective).
  • the case as illustrated in (A) of FIGURE 7 can be supported, and the cases as illustrated in (B) of FIGURE 7 and (C) of FIGURE 7 are not supported.
  • UE-2 may transmit if there is no further SL transmission(s) from UE-1 after UE-2's transmission in the CO.
  • the duration of the gap when switching the transmitter. For one instance, the duration of the gap cannot exceed a pre-defined threshold (e.g., 25 us).
  • multiple switches on the transmitter of the SL transmission(s) are allowed (e.g., no limitation on the number of switching points between the sidelink transmission bursts). For instance, the case as illustrated in (A) of FIGURE 7, (B) of FIGURE 7 and/or (C) of FIGURE 7 can be supported.
  • the duration of the gap(s) between the transmission bursts there is a further condition on the duration of the gap(s) between the transmission bursts. For one instance, the duration of any gap between transmission bursts cannot exceed a pre-defined threshold (e.g., 25 us).
  • SL transmission(s) from UE-1 there is a further condition on the SL transmission(s) from UE-1.
  • at least one of the examples on SL transmission burst described in this disclosure needs to be satisfied (e.g., Example SL-Burst-1 to SL-Burst-6), given the particular UE as UE-2 in the examples.
  • the SL transmission(s) from UE-2 is a single transmission burst, and at least one of the examples on SL transmission burst described in this disclosure needs to be satisfied (e.g., Example SL-Burst-1 to SL-Burst-6), given the particular UE as UE-1 in the examples.
  • the SL transmission(s) from UE-2 can be multiple transmission bursts (e.g., with interval between bursts larger than a pre-defined threshold, such as 16 us), and for each of the transmission burst, at least one of the examples on SL transmission burst described in this disclosure needs to be satisfied (e.g., Example SL-Burst-1 to SL-Burst-6), given the particular UE as UE-1 in the examples.
  • UE-2 may transmit one of the transmission bursts after performing channel access procedure given by at least one of the examples described in this disclosure (e.g., Example SL-LBT-1 to SL-LBT-6).
  • whether the CO initialized by the UE can be shared with other nodes can be provided to the UE, e.g. configured by a higher layer parameter (Uu link RRC and/or PC5 RRC), or provided by a pre-configuration.
  • a higher layer parameter Uu link RRC and/or PC5 RRC
  • whether the CO initialized by the UE can be shared with other nodes can be based on a further condition on the number or duration of failures in the channel access procedure. For one instance, if the number of failures in the channel access procedure exceeds a predefined threshold, the CO can be shared with other nodes after a successful channel access procedure. For another instance, if the duration of failures in the channel access procedure exceeds a predefined threshold, the CO can be shared with other nodes after a successful channel access procedure.
  • UE-2 may perform transmission on the SL after performing channel access procedure given by at least one of the examples described in this disclosure (e.g., Example SL-LBT-1 to SL-LBT-6).
  • the SL energy detection threshold is not provided (e.g., configured by a higher layer parameter, and/or provided by a pre-configuration)
  • at least one of the SL transmission(s) cannot include unicast transmission(s).
  • the duration of the SL transmission(s) e.g., no more than 2, 4, or 8 symbols for the SCS of SL BWP as 15, 30, or 60 kHz, respectively.
  • a first UE (e.g., UE-1) can initialize a channel occupancy for sidelink transmission(s) and share with a set of other UEs for sidelink transmission(s).
  • the UE-1 performs a Type 1 SL channel access procedure to initialize the CO.
  • the UE-1 initializes the channel occupancy on sidelink and performs SL transmission(s) to a set of other UEs, and one or more other UEs in the set can share the channel occupancy initialized by UE-1 to perform SL transmission(s), wherein the SL transmission(s) from other UE(s) include UE-1 as receiver or one of the receivers.
  • FIGURE 8 illustrates an example of CO sharing among multiple UEs with the same initiating device 800 according to various embodiments of the present disclosure.
  • An embodiment of the CO sharing among multiple UEs with the same initiating device 800 shown in FIGURE 8 is for illustration only.
  • the SL transmission(s) from UE-1 can be broadcast or groupcast (e.g., 801), with the set of other UEs as receivers of the transmission.
  • This example is shown in FIGURE 8 (e.g., (A)) (although only UE-2 (e.g., 803) and UE-3 (e.g., 802) are shown as illustration of the set of other UEs, the example can be applicable to more than two other UEs).
  • the SL transmission(s) from UE-1 can be a set of contiguous transmissions (e.g., at least including unicast transmission), with the set of other UEs as receivers of the contiguous transmissions.
  • This example is shown in FIGURE 8 (e.g., (C)) (although only UE-2 (e.g., 810) and UE-3 (e.g., 811) are shown as illustration of the set of other UEs, the example can be applicable to more than two other UEs).
  • the SL transmission(s) from UE-1 can be a set of non-contiguous transmissions (e.g., at least including unicast transmission), wherein each transmission may be with one or more of UEs in the set of other UEs as receiver(s).
  • FIGURE 8 e.g., (B)
  • UE-2 e.g., 805
  • UE-3 e.g., 807
  • the SL transmission(s) from UE-1 can be a combination of at least two of above instances, such as combination of examples by using a TMD manner, or combination of examples by supporting more than two other UEs wherein each two other UEs use one of the examples.
  • the UE initializing the CO e.g., UE-1) cannot continue to transmit if other UE shares the CO and transmits (e.g., at most one switching point from UE-1 perspective).
  • the cases as illustrated in (A) of FIGURE 8 and/or (C) of FIGURE 8 can be supported, and the cases as illustrated in (B) of FIGURE 8 is not supported.
  • UE-2 or UE-3 may transmit if there is no further SL transmission(s) from UE-1 after their transmission in the CO.
  • the duration of the time domain gap there is a further condition on the duration of the time domain gap between UE-1's transmission(s) and the proceeding transmission. For one instance, the duration of the gap cannot exceed a pre-defined threshold (e.g., 25 us).
  • the UE initializing the CO can continue to transmit after other UE shares the CO and transmits (e.g., no limitation on the number of switching points from UE-1 perspective).
  • the cases as illustrated in (A) of FIGURE 8, (B) of FIGURE 8, and/or (C) of FIGURE 8 can be supported.
  • the duration of the time domain gap(s) between the transmission bursts there is a further condition on the duration of the time domain gap(s) between the transmission bursts. For one instance, the duration of any gap between transmission bursts cannot exceed a pre-defined threshold (e.g., 25 us).
  • SL transmission(s) from UE-1 there is a further condition on the SL transmission(s) from UE-1.
  • at least one of the examples on SL transmission burst described in this disclosure needs to be satisfied (e.g., Example SL-Burst-1 to SL-Burst-6), given the particular UE as one of the UE from the set of other UEs in the examples.
  • the SL transmission(s) from any UE in the set of other UEs is a single transmission burst, and at least one of the examples on SL transmission burst described in this disclosure needs to be satisfied (e.g., Example SL-Burst-1 to SL-Burst-6), given the particular UE as UE-1 in the examples.
  • the SL transmission(s) from any UE in the set of other UEs can be multiple transmission bursts (e.g., with interval between bursts larger than a pre-defined threshold, such as 16 us), and for each of the transmission burst, at least one of the examples on SL transmission burst described in this disclosure needs to be satisfied (e.g., Example SL-Burst-1 to SL-Burst-6), given the particular UE as UE-1 in the examples.
  • any UE in the set of other UEs may transmit one of the transmission bursts after performing channel access procedure given by at least one of the examples described in this disclosure (e.g., Example SL-LBT-1 to SL-LBT-6).
  • whether the CO initialized by the UE can be shared with other nodes can be provided to the UE, e.g. configured by a higher layer parameter (Uu link RRC and/or PC5 RRC), or provided by a pre-configuration.
  • a higher layer parameter Uu link RRC and/or PC5 RRC
  • the priority of the SL transmission(s) from other UE(s) e.g., UE-2 or UE-3
  • the CO initialized by the UE-1 can be shared to the corresponding UE.
  • whether the CO initialized by the UE can be shared with other nodes can be based on a further condition on the number or duration of failures in the channel access procedure. For one instance, if the number of failures in the channel access procedure exceeds a predefined threshold, the CO can be shared with other nodes after a successful channel access procedure. For another instance, if the duration of failures in the channel access procedure exceeds a predefined threshold, the CO can be shared with other nodes after a successful channel access procedure.
  • any UE in the set of other UEs may perform transmission on the SL after performing channel access procedure given by at least one of the examples described in this disclosure (e.g., Example SL-LBT-1 to SL-LBT-6).
  • the SL energy detection threshold is not provided (e.g., configured by a higher layer parameter, and/or provided by a pre-configuration)
  • at least one of the SL transmission(s) cannot include unicast transmission(s).
  • the duration of the SL transmission(s) e.g., no more than 2, 4, or 8 symbols for the SCS of SL BWP as 15, 30, or 60 kHz, respectively.
  • a first UE (e.g., UE-1) can initialize a channel occupancy for sidelink transmission(s) and share with a set of other UEs for sidelink transmission(s).
  • the UE-1 performs a Type 1 SL channel access procedure to initialize the CO.
  • FIGURE 9 illustrates an example of CO sharing among multiple UEs with the different initiating devices 900 according to various embodiments of the present disclosure.
  • An embodiment of the CO sharing among multiple UEs with the different initiating devices 900 shown in FIGURE 9 is for illustration only.
  • the UE-1 initializes the channel occupancy on sidelink and performs SL transmission(s) to a first set of other UEs (e.g., 901), and one or more other UEs in the first set can share the channel occupancy initialized by UE-1 to perform SL transmission(s), wherein the SL transmission(s) from other UE(s) in the first set (e.g., UE-2) include a second set of other UE(s) (e.g., UE-3) as the receiver(s) (e.g., 902).
  • a first set of other UEs e.g., 901
  • the SL transmission(s) from other UE(s) in the first set include a second set of other UE(s) (e.g., UE-3) as the receiver(s) (e.g., 902).
  • FIGURE 9 e.g., (A)
  • only single UE-2 in the first set of other UE(s) and single UE-3 in the second set of other UE(s) are only for illustration purpose, and the example can be applicable to more than one UEs in the first and/or the second set of other UE(s).
  • the example can be supported, if there is a further condition on the SL transmission from the first set of other UEs (e.g., UE-2) to the second set of other UEs (e.g., UE-3).
  • the SL transmission (e.g., 905) from the first set of other UEs (e.g., UE-2) to the second set of other UEs (e.g., UE-3) may include the UE initializing the CO (e.g., UE-1) (e.g., 904) as one of its additional receiver (e.g., by broadcast and/or groupcast), and/or the SL transmission from the first set of other UEs (e.g., UE-2) to the second set of other UEs (e.g., UE-3) may be multiplexed with SL transmission(s) from the first set of other UEs (e.g., UE-2) to the UE initializing the CO (e.g., UE-1) (e.g., by forming a burst).
  • FIGURE 9 e.g., (B)
  • the SL transmission from the first set of other UEs (e.g., UE-2) to the second set of other UEs (e.g., UE-3) (e.g., 907) may be followed with a further SL transmission from the second set of other UEs (e.g., UE-3) to the UE initializing the CO (e.g., UE-1) (e.g., 908).
  • FIGURE 9 e.g., (C)).
  • the second set of other UEs may be as receiver(s) (e.g., 910 and 911) in at least one of the previous SL transmission(s) within the CO, wherein the SL transmission(s) is from the UE initializing the CO (e.g., UE-1). This instance is shown in FIGURE 9 (e.g., (D)).
  • the UE initializing the CO e.g., UE-1) cannot continue to transmit if other UE shares the CO and transmits (e.g., at most one switching point from UE-1 perspective). For instance, only the first set of other UEs (e.g., UE-2) can share the CO and perform transmission(s) as the transmitter(s).
  • the duration of the time domain gap there is a further condition on the duration of the time domain gap between UE-1's transmission(s) and the proceeding transmission. For one instance, the duration of the gap cannot exceed a pre-defined threshold (e.g., 25 us).
  • the UE initializing the CO can continue to transmit after other UE shares the CO and transmits (e.g., no limitation on the number of switching points from UE-1 perspective).
  • the CO can be shared to a first set of other UE(s) (e.g., UE-2) as transmitter(s) of SL transmission(s), and further shared to a second set of other UE(s) (e.g., UE-3) as transmitter(s) of SL transmission(s), and so on, until the maximum channel occupancy time is achieved.
  • the duration of the gap(s) between the transmission bursts there is a further condition on the duration of the gap(s) between the transmission bursts. For one instance, the duration of any gap between transmission bursts cannot exceed a pre-defined threshold (e.g., 25 us).
  • the duration of the gap(s) between the transmission bursts there is no condition on the duration of the gap(s) between the transmission bursts. For one instance, the duration of gap(s) is not counted into the channel occupancy time.
  • SL transmission(s) from UE-1 there is a further condition on the SL transmission(s) from UE-1.
  • at least one of the examples on SL transmission burst described in this disclosure needs to be satisfied (e.g., Example SL-Burst-1 to SL-Burst-6), given the particular UE as one of the UE from the first set of other UEs (e.g., UE-2) in the examples.
  • the SL transmission(s) from the first set of other UEs (e.g., UE-2) to the second set of other UEs (e.g., UE-3) is a single transmission burst, and at least one of the examples on SL transmission burst described in this disclosure needs to be satisfied (e.g., Example SL-Burst-1 to SL-Burst-6), given the particular UE as a UE in the second set of other UEs (e.g., UE-3) in the examples.
  • the SL transmission(s) from the first set of other UEs (e.g., UE-2) to the second set of other UEs (e.g., UE-3) can be multiple transmission bursts (e.g., with interval between bursts larger than a pre-defined threshold, such as 16 us), and for each of the transmission burst, at least one of the examples on SL transmission burst described in this disclosure needs to be satisfied (e.g., Example SL-Burst-1 to SL-Burst-6), given the particular UE as a UE in the second set of other UEs (e.g., UE-3) in the examples.
  • a pre-defined threshold such as 16 us
  • the UE in the first set of other UEs may transmit one of the transmission bursts after performing channel access procedure given by at least one of the examples described in this disclosure (e.g., Example SL-LBT-1 to SL-LBT-6).
  • whether the CO initialized by the UE can be shared with other nodes can be provided to the UE, e.g., configured by a higher layer parameter (Uu link RRC and/or PC5 RRC), or provided by a pre-configuration.
  • a higher layer parameter Uu link RRC and/or PC5 RRC
  • whether the CO initialized by the UE can be shared with other nodes can be based on a further condition on the number or duration of failures in the channel access procedure. For one instance, if the number of failures in the channel access procedure exceeds a predefined threshold, the CO can be shared with other nodes after a successful channel access procedure. For another instance, if the duration of failures in the channel access procedure exceeds a predefined threshold, the CO can be shared with other nodes after a successful channel access procedure.
  • a UE in the first set of other UEs may perform transmission on the SL after performing channel access procedure given by at least one of the examples described in this disclosure (e.g., Example SL-LBT-1 to SL-LBT-6).
  • the SL energy detection threshold is not provided (e.g., configured by a higher layer parameter, and/or provided by a pre-configuration)
  • at least one of the SL transmission(s) cannot include unicast transmission(s).
  • the duration of the SL transmission(s) e.g., no more than 2, 4, or 8 symbols for the SCS of SL BWP as 15, 30, or 60 kHz, respectively.
  • a first UE e.g., UE-1
  • a second UE e.g., UE-3
  • UE-1 can initialize a channel occupancy for sidelink transmission(s) and share the CO with a second UE (e.g., UE-3) to perform sidelink transmission(s).
  • the UE-1 performs a Type 1 SL channel access procedure to initialize the CO.
  • FIGURE 10 illustrates an example of CO sharing between parallel sidelink transmissions 1000 according to various embodiments of the present disclosure.
  • An embodiment of the CO sharing between parallel sidelink transmissions 1000 shown in FIGURE 10 is for illustration only.
  • the first UE (e.g., UE-1) initializes the channel occupancy on sidelink and performs SL transmission(s) to a first set of other UEs (e.g., UE-2) (e.g., 1001)
  • the second UE e.g., UE-3 shares the channel occupancy and performs SL transmission(s) to a second set of other UEs (e.g., UE-4) (e.g., 1002).
  • FIGURE 10 e.g., (A)
  • the first set of other UEs and the second set of other UEs are required to be the same, e.g., common receiver(s) for the first UE and the second UE's SL transmission(s).
  • the example is shown in FIGURE 10 (e.g., (B)).
  • the second UE is a receiver or as one receiver in the receiver list for a previous transmission from the first UE in the same channel occupancy.
  • the set of UEs for the example to be supported. For instance, at least one of the first UE, the second UE, the first set of other UEs, or the second set of other UEs are within the coverage of a gNB.
  • the UE initializing the CO e.g., UE-1) cannot continue to transmit if other UE shares the CO and transmits (e.g., at most one switching point from UE-1 perspective).
  • the second UE e.g., UE-3 can share the CO and perform transmission(s) as the transmitter(s).
  • the duration of the gap there is a further condition on the duration of the gap between UE-1's transmission(s) and the proceeding transmission. For one instance, the duration of the gap cannot exceed a pre-defined threshold (e.g., 25 us).
  • a pre-defined threshold e.g. 25 us
  • the UE initializing the CO can continue to transmit after other UE shares the CO and transmits (e.g., no limitation on the number of switching points from UE-1 perspective).
  • the CO can be shared to a second UE (e.g., UE-3) as transmitter(s) of SL transmission(s), and further shared to a third UE as transmitter(s) of SL transmission(s), and so on, until the maximum channel occupancy time is achieved.
  • the duration of the gap(s) between the transmission bursts there is a further condition on the duration of the gap(s) between the transmission bursts. For one instance, the duration of any gap between transmission bursts cannot exceed a pre-defined threshold (e.g., 25 us).
  • the duration of the gap(s) between the transmission bursts there is no condition on the duration of the gap(s) between the transmission bursts. For one instance, the duration of gap(s) is not counted into the channel occupancy time.
  • the first UE e.g., UE-1
  • the first set of other UEs e.g., UE-2
  • at least one of the examples on SL transmission burst described in this disclosure needs to be satisfied (e.g., Example SL-Burst-1 to SL-Burst-6), given the particular UE as one of the UE from the first set of other UEs (e.g., UE-2) in the examples.
  • the SL transmission(s) from the second UE (e.g., UE-3) to the second set of other UEs (e.g., UE-4) is a single transmission burst, and at least one of the examples on SL transmission burst described in this disclosure needs to be satisfied (e.g., Example SL-Burst-1 to SL-Burst-6), given the particular UE as a UE in the second set of other UEs (e.g., UE-4) in the examples.
  • the SL transmission(s) from the second UE (e.g., UE-3) to the second set of other UEs (e.g., UE-4) can be multiple transmission bursts (e.g., with interval between bursts larger than a pre-defined threshold, such as 16 us), and for each of the transmission burst, at least one of the examples on SL transmission burst described in this disclosure needs to be satisfied (e.g., Example SL-Burst-1 to SL-Burst-6), given the particular UE as a UE in the second set of other UEs (e.g., UE-4) in the examples.
  • a pre-defined threshold such as 16 us
  • the second UE may transmit one of the transmission bursts after performing channel access procedure given by at least one of the examples described in this disclosure (e.g., Example SL-LBT-1 to SL-LBT-6).
  • whether the CO initialized by the UE can be shared with other nodes can be provided to the UE, e.g., configured by a higher layer parameter (Uu link RRC and/or PC5 RRC), or provided by a pre-configuration.
  • a higher layer parameter Uu link RRC and/or PC5 RRC
  • whether the CO initialized by the UE can be shared with other nodes can be based on a further condition on the number or duration of failures in the channel access procedure. For one instance, if the number of failures in the channel access procedure exceeds a predefined threshold, the CO can be shared with other nodes after a successful channel access procedure. For another instance, if the duration of failures in the channel access procedure exceeds a predefined threshold, the CO can be shared with other nodes after a successful channel access procedure.
  • the second UE may perform transmission on the SL after performing channel access procedure given by at least one of the examples described in this disclosure (e.g., Example SL-LBT-1 to SL-LBT-6).
  • the SL energy detection threshold is not provided (e.g., configured by a higher layer parameter, and/or provided by a pre-configuration)
  • at least one of the SL transmission(s) cannot include unicast transmission(s).
  • the duration of the SL transmission(s) e.g., no more than 2, 4, or 8 symbols for the SCS of SL BWP as 15, 30, or 60 kHz, respectively.
  • a UE e.g., UE-1
  • the UE-1 when initializing the channel occupancy for sidelink transmission(s), the UE-1 performs a Type 1 SL channel access procedure to initialize the CO.
  • the UE-1 when initializing the channel occupancy for uplink transmission(s), the UE-1 performs a Type 1 UL channel access procedure to initialize the CO.
  • the UE-1 when initializing the channel occupancy for multiplexed sidelink and uplink transmission(s), the UE-1 performs a Type 1 UL/SL channel access procedure to initialize the CO.
  • FIGURE 11 illustrates an example of CO sharing between SL and UL 1100 according to various embodiments of the present disclosure.
  • An embodiment of the CO sharing between SL and UL 1100 shown in FIGURE 11 is for illustration only.
  • the UE-1 initializes the channel occupancy on sidelink and performs SL transmission(s) to a set of other UE(s) (e.g., UE-2) (e.g., 1101), and the UE-1 can share the CO and multiplex at least one UL transmission(s) to a gNB with the SL transmission(s) (e.g., 1102).
  • UE-2 e.g., UE-1
  • FIGURE 11 e.g., (A)
  • the UE-1 initializes the channel occupancy on uplink and performs UL transmission(s) to a gNB, and the UE-1 can share the CO and multiplex at least one SL transmission(s) with the UL transmission(s).
  • FIGURE 11 e.g., (A)
  • the UE-1 initializes the channel occupancy and perform multiplexed UL/SL transmissions to a gNB and a set of other UE(s) (e.g., UE-2), respectively.
  • a gNB e.g., a set of other UE(s)
  • FIGURE 11 e.g., (A)
  • the UE-2 can further share the CO and perform SL transmission(s) to UE-1 (e.g., 1103).
  • the example is shown in FIGURE 11 (e.g., (B)).
  • the UL transmission(s) 1104 can be TDMed with the SL transmission(s) 1105.
  • the UL transmission(s) 1104 can be IFDMed, FDMed, or CDMed with the SL transmission(s) 1105.
  • UE-2 can further share the CO and perform UL transmission(s) to the gNB.
  • the example is shown in FIGURE 11 (e.g., (C)).
  • the UL transmission(s) 1107 can be TDMed with the UL transmission(s) 1108.
  • the UL transmission(s) 1107 can be IFDMed, FDMed, or CDMed with the UL transmission(s) 1108.
  • the UE-2 can further share the CO and perform UL transmission(s) to a third UE (e.g., UE-3).
  • a third UE e.g., UE-3
  • the example is shown in FIGURE 11 (e.g., (D)).
  • the UL transmission(s) 1110 can be TDMed with the SL transmission(s) 1111.
  • the UL transmission(s) 1110 can be IFDMed, FDMed, or CDMed with the SL transmission(s) 1111.
  • the UE initializing the CO e.g., UE-1) cannot continue to transmit if other UE shares the CO and transmits (e.g., at most one switching point from UE-1 perspective). For instance, only the set of other UEs (e.g., UE-2) can share the CO and perform transmission(s) as the transmitter(s).
  • the duration of the gap there is a further condition on the duration of the gap between UE-1's transmission(s) and the proceeding transmission. For one instance, the duration of the gap cannot exceed a pre-defined threshold (e.g., 25 us).
  • a pre-defined threshold e.g. 25 us
  • the UE initializing the CO (e.g., UE-1) can continue to transmit after other UE shares the CO and transmits (e.g., no limitation on the number of switching points from UE-1 perspective).
  • the duration of the gap(s) between the transmission bursts there is a further condition on the duration of the gap(s) between the transmission bursts. For one instance, the duration of any gap between transmission bursts cannot exceed a pre-defined threshold (e.g., 25 us).
  • the duration of the gap(s) between the transmission bursts there is no condition on the duration of the gap(s) between the transmission bursts. For one instance, the duration of gap(s) is not counted into the channel occupancy time.
  • the UE(s) there is a further condition on the UE(s). For instance, at least one of the first set of UE(s) (e.g., UE-1) or the second set of UE(s) (e.g., UE-2) or the third set of UE(s) (e.g., UE-3) is within the coverage of the gNB.
  • the first set of UE(s) e.g., UE-1
  • the second set of UE(s) e.g., UE-2
  • the third set of UE(s) e.g., UE-3
  • at least one of the examples on UL/SL transmission burst described in this disclosure needs to be satisfied (e.g., Example UL-SL-Burst-1 to UL-SL-Burst-6), given the particular UE as one of the UE from the set of other UEs (e.g., UE-2) in the examples.
  • SL transmission(s) from UE-1 there is a further condition on the SL transmission(s) from UE-1.
  • at least one of the examples on SL transmission burst described in this disclosure needs to be satisfied (e.g., Example SL-Burst-1 to SL-Burst-6), given the particular UE as one of the UE from the set of other UEs (e.g., UE-2) in the examples.
  • whether the CO initialized by the UE can be shared with other nodes can be provided to the UE, e.g., configured by a higher layer parameter (Uu link RRC and/or PC5 RRC), or provided by a pre-configuration.
  • the information on whether a CO can be shared for UL transmission and SL transmission can be provided to the UE separately (e.g., separate indication).
  • the information on whether a CO can be shared for UL transmission and SL transmission can be provided to the UE jointly (e.g., joint indication).
  • whether the CO initialized by the UE can be shared with other nodes can be based on a further condition on the number or duration of failures in the channel access procedure. For one instance, if the number of failures in the channel access procedure exceeds a predefined threshold, the CO can be shared with other nodes after a successful channel access procedure. For another instance, if the duration of failures in the channel access procedure exceeds a predefined threshold, the CO can be shared with other nodes after a successful channel access procedure.
  • the first UE may perform transmission on the SL after performing channel access procedure given by at least one of the examples described in this disclosure (e.g., Example SL-LBT-1 to SL-LBT-6), or perform transmission on the UL after performing channel access procedure given by at least one of the examples described in this disclosure (e.g., Example UL-LBT-1 to UL-LBT-3).
  • a sidelink UE may perform the UL/SL transmission after performing channel access procedure given by at least one of the examples described in this disclosure (e.g., Example UL-SL-LBT-1 to UL-SL-LBT-6).
  • the SL energy detection threshold is not provided (e.g., configured by a higher layer parameter, and/or provided by a pre-configuration)
  • at least one of the SL transmission(s) cannot include unicast transmission(s).
  • the duration of the SL transmission(s) e.g., no more than 2, 4, or 8 symbols for the SCS of SL BWP as 15, 30, or 60 kHz, respectively.
  • a UE e.g., UE-1
  • the UE-1 when initializing the channel occupancy for sidelink transmission(s), the UE-1 performs a Type 1 SL channel access procedure to initialize the CO.
  • FIGURE 12 illustrates an example of CO sharing between SL and DL 1200 according to various embodiments of the present disclosure.
  • An embodiment of the CO sharing between SL and DL 1200 shown in FIGURE 12 is for illustration only.
  • the UE-1 initializes the channel occupancy on sidelink and performs SL transmission(s) to a set of other UE(s) (e.g., UE-2) (e.g., 1201), and the UE-1 can share the CO to a gNB such that the gNB can perform DL transmission(s) to the UE-2 (e.g., 1202).
  • UE-1 initializes the channel occupancy on sidelink and performs SL transmission(s) to a set of other UE(s) (e.g., UE-2) (e.g., 1201)
  • the UE-1 can share the CO to a gNB such that the gNB can perform DL transmission(s) to the UE-2 (e.g., 1202).
  • FIGURE 12 e.g., (A)
  • the UE-1 initializes the channel occupancy on sidelink and performs SL transmission(s) to a set of other UE(s) (e.g., UE-2) (e.g., 1203), and the UE-1 can share the CO to a gNB such that the gNB can perform DL transmission(s) to the UE-1 (e.g., 1204).
  • UE-2 e.g., UE-2
  • UE-1 can share the CO to a gNB such that the gNB can perform DL transmission(s) to the UE-1 (e.g., 1204).
  • FIGURE 12 e.g., (B)
  • the UE initializing the CO e.g., UE-1
  • the UE initializing the CO cannot continue to transmit if a gNB shares the CO and transmits (e.g., at most one switching point from UE-1 perspective).
  • the duration of the gap there is a further condition on the duration of the gap between UE-1's transmission(s) and the proceeding transmission. For one instance, the duration of the gap cannot exceed a pre-defined threshold (e.g., 25 us).
  • a pre-defined threshold e.g. 25 us
  • the UE initializing the CO (e.g., UE-1) can continue to transmit after the gNB shares the CO and transmits (e.g., no limitation on the number of switching points from UE-1 perspective).
  • the duration of the gap(s) between the transmission bursts there is a further condition on the duration of the gap(s) between the transmission bursts. For one instance, the duration of any gap between transmission bursts cannot exceed a pre-defined threshold (e.g., 25 us).
  • the duration of the gap(s) between the transmission bursts there is no condition on the duration of the gap(s) between the transmission bursts. For one instance, the duration of gap(s) is not counted into the channel occupancy time.
  • the set of UEs there is a further condition on the set of UEs for the example to be supported. For instance, at least one of the UE initializing the CO (e.g., UE-1) or the UE(s) receiving the SL transmission(s) (e.g., UE-2) is within the coverage of the gNB.
  • the UE initializing the CO e.g., UE-1
  • the UE(s) receiving the SL transmission(s) e.g., UE-2
  • the set of other UEs e.g., UE-2
  • at least one of the examples on SL transmission burst described in this disclosure needs to be satisfied (e.g., Example SL-Burst-1 to SL-Burst-6), given the particular UE as one of the UE from the set of other UEs (e.g., UE-2) in the examples.
  • the DL transmission(s) convey non-unicast information.
  • the DL transmission(s) convey unicast information with a particular UE as the receiver (e.g., the particular UE is UE-2 in (A) of FIGURE 12 or UE-1 in (B) of FIGURE 12).
  • the DL transmission(s) cannot convey unicast information to other UEs except for a particular UE (e.g., the particular UE is UE-2 in (A) of FIGURE 12 or UE-1 in (B) of FIGURE 12).
  • the gNB may perform transmission on the DL after performing channel access procedure given by at least one of the examples described in this disclosure (e.g., Example DL-LBT-1 to DL-LBT-3).
  • the SL energy detection threshold is not provided (e.g., configured by a higher layer parameter, and/or provided by a pre-configuration)
  • at least one of the SL transmission(s) cannot include unicast transmission(s).
  • the duration of the SL transmission(s) e.g., no more than 2, 4, or 8 symbols for the SCS of SL BWP as 15, 30, or 60 kHz, respectively.
  • the DL transmission(s) cannot include unicast transmission(s).
  • the duration of the DL transmission(s) e.g., no more than 2, 4, or 8 symbols for the SCS of SL BWP as 15, 30, or 60 kHz, respectively.
  • a UE e.g., UE-1
  • the UE-1 when initializing the channel occupancy for sidelink transmission(s), the UE-1 performs a Type 1 SL channel access procedure to initialize the CO.
  • the UE-1 when initializing the channel occupancy for uplink transmission(s), the UE-1 performs a Type 1 UL channel access procedure to initialize the CO.
  • the UE-1 when initializing the channel occupancy for multiplexed sidelink and uplink transmission(s), the UE-1 performs a Type 1 UL/SL channel access procedure to initialize the CO.
  • FIGURE 13 illustrates an example of CO sharing among SL, UL, and DL 1300 according to various embodiments of the present disclosure.
  • An embodiment of the CO sharing among SL, UL, and DL 1300 shown in FIGURE 13 is for illustration only.
  • the UE-1 initializes the channel occupancy on sidelink and perform SL transmission(s) to a set of other UE(s) (e.g., UE-2) (e.g., 1301), and at least one UE in the set of other UE(s) (e.g., UE-2) shares the CO and performs UL transmission(s) to a gNB (e.g., 1302), and the gNB further shares the CO and performs DL transmission(s) to the UE initializing the CO (e.g., UE-1) (e.g., 1303).
  • FIGURE 13 e.g., (A)
  • the UE-1 initializes the channel occupancy and performs UL and SL transmission(s) to a gNB and a set of other UE(s) (e.g., UE-2) (e.g., 1304), respectively, wherein the UL and SL transmission(s) can be multiplexed into a burst (e.g., IFDMed, FDMed, TDMed, or CDMed) or multiplexed into multiple bursts, and the gNB shares the CO and perform DL transmission(s) to at least one UE in the set of other UE(s) (e.g., UE-2) (e.g., 1306).
  • a burst e.g., IFDMed, FDMed, TDMed, or CDMed
  • FIGURE 13 e.g., (B)
  • the UE-1 initializes the channel occupancy and performs SL transmission(s) to a set of other UE(s) (e.g., UE-2) (e.g., 1307), and at least one UE in the set of other UE(s) (e.g., UE-2) shares the CO and performs UL transmission(s) to a gNB (e.g., 1308), and the gNB further shares the CO and performs DL transmission(s) to the at least one UE in the set of other UE(s) (e.g., UE-2) (e.g., 1309).
  • FIGURE 13 e.g., (C)
  • the UE-1 initializes the channel occupancy and performs SL transmission(s) to a set of other UE(s) (e.g., UE-2 (e.g., 1310), and a gNB shares the CO and performs DL transmission(s) to at least one UE in the set of other UE(s) (e.g., UE-2) (e.g., 1311), and the at least one UE in the set of other UE(s) (e.g., UE-2) further shares the CO and performs UL transmission(s) to the gNB (e.g., 1313).
  • FIGURE 13 e.g., (D)
  • the UE-1 initializes the channel occupancy and performs UL and SL transmission(s) to a gNB and a set of other UE(s) (e.g., UE-2) (e.g., 1313), respectively, wherein the UL and SL transmission(s) can be multiplexed into a burst (e.g., IFDMed, FDMed, TDMed, or CDMed) or multiplexed into multiple bursts, and the gNB shares the CO and perform DL transmission(s) to the UE initializing the CO (e.g., UE-1) (e.g., 1315).
  • a burst e.g., IFDMed, FDMed, TDMed, or CDMed
  • the gNB shares the CO and perform DL transmission(s) to the UE initializing the CO (e.g., UE-1) (e.g., 1315).
  • FIGURE 13 e.g., (E)
  • the UE-1 initializes the channel occupancy and performs SL transmission(s) to a set of other UE(s) (e.g., UE-2) (e.g., 1316), and a gNB shares the CO and performs DL transmission(s) to the UE initializing the CO (e.g., UE-1) (e.g., 1317), and the UE initializing the CO (e.g., UE-1) further shares the CO and performs UL transmission(s) to the gNB (e.g., 1318).
  • FIGURE 13 e.g., (F)
  • the UE-1 initializes the channel occupancy and performs UL transmission(s) to a gNB, and the gNB shares the CO and performs DL transmission(s) to a set of other UE(s) (e.g., UE-2) (e.g., 1319), and at least one UE in the set of other UE(s) (e.g., UE-2) further shares the CO and performs SL transmission(s) to the UE initializing the CO (e.g., UE-1) (e.g., 1321).
  • FIGURE 13 e.g., (G)
  • the UE-1 initializes the channel occupancy and performs UL transmission(s) to a gNB (e.g., 1322), and the gNB shares the CO and performs DL transmission(s) to the UE initializing the CO (e.g., UE-1) (e.g., 1323), and the UE initializing the CO (e.g., UE-1) further shares the CO and performs SL transmission(s) to a set of other UE(s) (e.g., UE-2) (e.g., 1324).
  • FIGURE 13 e.g., (H)
  • the UE initializing the CO cannot continue to transmit after other UE or gNB shares the CO and transmits (e.g., there is at most one switching point from the UE-1 perspective).
  • the duration of the gap there is a further condition on the duration of the gap between the transmission bursts in the CO. For one instance, the duration of the gap cannot exceed a pre-defined threshold (e.g., 25 us).
  • a pre-defined threshold e.g. 25 us
  • the UE initializing the CO (e.g., UE-1) can continue to transmit after other UE or gNB shares the CO and transmits (e.g., no limitation on the number of switching points from UE-1 perspective).
  • the duration of the gap(s) between the transmission bursts in the CO there is a further condition on the duration of the gap(s) between the transmission bursts in the CO. For one instance, the duration of any gap between transmission bursts cannot exceed a pre-defined threshold (e.g., 25 us).
  • the duration of the gap(s) between the transmission bursts there is no condition on the duration of the gap(s) between the transmission bursts. For one instance, the duration of gap(s) is not counted into the channel occupancy time.
  • the UE there is a further condition on the UE(s). For instance, at least one of the UE initializing the CO (e.g., UE-1) or the set of other UE(s) (e.g., UE-2) is within the coverage of the gNB.
  • the UE initializing the CO e.g., UE-1
  • the set of other UE(s) e.g., UE-2
  • at least one of the examples on UL/SL transmission burst described in this disclosure needs to be satisfied (e.g., Example UL-SL-Burst-1 to UL-SL-Burst-6), given the particular UE as one of the UE from the set of other UEs (e.g., UE-2) in the examples.
  • the this to be supported there is a further condition on the UL/SL transmission(s) from the set of other UE(s) (e.g., UE-2).
  • UE-2 the set of other UE(s)
  • at least one of the examples on UL/SL transmission burst described in this disclosure needs to be satisfied (e.g., Example UL-SL-Burst-1 to UL-SL-Burst-6), given the particular UE as the UE initializing the CO (e.g., UE-1).
  • SL transmission(s) from UE-1 there is a further condition on the SL transmission(s) from UE-1.
  • at least one of the examples on SL transmission burst described in this disclosure needs to be satisfied (e.g., Example SL-Burst-1 to SL-Burst-6), given the particular UE as one of the UE from the set of other UEs (e.g., UE-2) in the examples.
  • SL transmission(s) from UE-2 there is a further condition on the SL transmission(s) from UE-2.
  • at least one of the examples on SL transmission burst described in this disclosure needs to be satisfied (e.g., Example SL-Burst-1 to SL-Burst-6), given the particular UE as the UE initializing the CO (e.g., UE-1) in the examples.
  • the DL transmission may include non-unicast information and/or unicast information only to the UE(s) involved in the SL transmission(s) in the CO.
  • whether the CO initialized by the UE can be shared with other nodes can be configured by a higher layer parameter.
  • whether the CO initialized by the UE can be shared with other nodes can be based on a further condition on the number or duration of failures in the channel access procedure. For one instance, if the number of failures in the channel access procedure exceeds a predefined threshold, the CO can be shared with other nodes after a successful channel access procedure. For another instance, if the duration of failures in the channel access procedure exceeds a predefined threshold, the CO can be shared with other nodes after a successful channel access procedure.
  • the UE may perform SL transmission(s) after performing channel access procedure given by at least one of the examples described in this disclosure (e.g., Example SL-LBT-1 to SL-LBT-6), or perform UL transmission(s) after performing channel access procedure given by at least one of the examples described in this disclosure (e.g., Example UL-LBT-1 to UL-LBT-3), or perform DL transmission(s) after performing channel access procedure given by at least one of the examples described in this disclosure (e.g., Example DL-LBT-1 to DL-LBT-3).
  • a sidelink UE may perform the UL/SL transmission after performing channel access procedure given by at least one of the examples described in this disclosure (e.g., Example UL-SL-LBT-1 to UL-SL-LBT-6).
  • the SL energy detection threshold is not provided (e.g., configured by a higher layer parameter, and/or provided by a pre-configuration)
  • at least one of the SL transmission(s) cannot include unicast transmission(s).
  • the duration of the SL transmission(s) e.g., no more than 2, 4, or 8 symbols for the SCS of SL BWP as 15, 30, or 60 kHz, respectively.
  • the DL energy detection threshold is not provided (e.g., configured by a higher layer parameter, and/or provided by a pre-configuration)
  • at least one of the DL transmission(s) cannot include unicast transmission(s).
  • the duration of the DL transmission(s) e.g., no more than 2, 4, or 8 symbols for the SCS of SL BWP as 15, 30, or 60 kHz, respectively.
  • examples in this disclosure can be combined.
  • a UE can initialize a channel occupancy and perform at least one of uplink and/or sidelink transmission(s) and further shares the CO with a set of other UE(s) or gNB for transmission(s).
  • the condition(s) associated with the embodiment(s) and the example(s) of the embodiment(s) in this disclosure can also be applicable when the examples are combined.
  • FIGURE 14 illustrates an example method 1400 for UE channel occupancy sharing with a SL in a wireless communication system according to embodiments of the present disclosure.
  • the steps of the method 1400 of FIGURE 14 can be performed by any of the UEs 111-116 of FIGURE 1, such as the UE 116 of FIGURE 3.
  • the method 1400 is for illustration only and other embodiments can be used without departing from the scope of the present disclosure.
  • the method 1400 begins with the UE performing a channel access procedure to initiate a channel occupancy on a channel with shared spectrum channel access (step 1405).
  • the channel access procedure to initiate the channel occupancy is a Type 1 sidelink channel access procedure and a time duration spanned by sensing slots that are sensed to be idle before a sidelink transmission is random.
  • the UE determines that the channel occupancy is to be shared with at least one other UE (step 1410).
  • the UE then transmits a first sidelink transmission within the channel occupancy (step 1415).
  • the first sidelink transmission is a PSSCH or a PSCCH conveying a unicast transmission to a first UE among the at least one other UE or a PSSCH or a PSCCH conveying a groupcast transmission to the at least one other UE.
  • the UE then receives a second sidelink transmission within the channel occupancy after transmitting the first sidelink transmission (step 1420).
  • the second sidelink transmission is within the channel occupancy and from the at least one other UE.
  • the second sidelink transmission is a PSSCH or a PSCCH conveying unicast transmission to the UE or a PSFCH transmitted to the UE.
  • the UE may also determine a gap in time domain between the first sidelink transmission and the second sidelink transmission within the channel occupancy, determine a sidelink channel access procedure based on a duration of the gap, and indicate the sidelink channel access procedure to the at least one other UE.
  • the sidelink channel access procedure is Type 2A, when the duration of the gap is at least 25 us; the sidelink channel access procedure is Type 2B, when the duration of the gap is 16 us; and the sidelink channel access procedure is Type 2C, when the duration of the gap is less than 16 us.
  • the second sidelink transmission may start immediately after sensing the channel to be idle for at least a sensing interval of 25 us; when the sidelink channel access procedure is Type 2B, the second sidelink transmission may start immediately after sensing the channel to be idle for at least a sensing interval of 16 us; and when the sidelink channel access procedure is Type 2C, the second sidelink transmission may start immediately without sensing the channel.
  • the UE may transmit a third sidelink transmission within the channel occupancy after receiving the second sidelink transmission.
  • the third sidelink transmission is: a PSSCH or a PSCCH conveying a unicast transmission to a second UE among the at least one other UE; or a PSSCH or a PSCCH conveying a groupcast transmission to the at least one other UE.
  • the UE may determine a gap in time domain between the second sidelink transmission and a third sidelink transmission within the channel occupancy, determine a sidelink channel access procedure based on a duration of the gap, and performing the sidelink channel access procedure.
  • the sidelink channel access procedure is Type 2A, when the duration of the gap is at least 25 us; the sidelink channel access procedure is Type 2B, when the duration of the gap is 16 us; and the sidelink channel access procedure is Type 2C, when the duration of the gap is less than 16 us.
  • FIGURE 15 illustrates a block diagram illustrating a structure of a UE according to an embodiment of the disclosure.
  • FIG. 15 corresponds to the example of the UE of FIG. 3.
  • the UE may include a transceiver 1510, a memory 1520, and a processor 1530.
  • the transceiver 1510, the memory 1520, and the processor 1530 of the UE may operate according to a communication method of the UE described above.
  • the components of the UE are not limited thereto.
  • the UE may include more or fewer components than those described above.
  • the processor 1530, the transceiver 1510, and the memory 1520 may be implemented as a single chip.
  • the processor 1530 may include at least one processor.
  • the transceiver 1510 collectively refers to a UE receiver and a UE transmitter, and may transmit/receive a signal to/from a base station or a network entity.
  • the signal transmitted or received to or from the base station or a network entity may include control information and data.
  • the transceiver 1510 may include a RF transmitter for up-converting and amplifying a frequency of a transmitted signal, and a RF receiver for amplifying low-noise and down-converting a frequency of a received signal.
  • the transceiver 1510 may receive and output, to the processor 1530, a signal through a wireless channel, and transmit a signal output from the processor 1530 through the wireless channel.
  • the memory 1520 may store a program and data required for operations of the UE. Also, the memory 1520 may store control information or data included in a signal obtained by the UE.
  • the memory 1520 may be a storage medium, such as read-only memory (ROM), random access memory (RAM), a hard disk, a CD-ROM, and a DVD, or a combination of storage media.
  • the processor 1530 may control a series of processes such that the UE operates as described above.
  • the transceiver 1510 may receive a data signal including a control signal transmitted by the base station or the network entity, and the processor 1530 may determine a result of receiving the control signal and the data signal transmitted by the base station or the network entity.
  • FIGURE 16 illustrates a block diagram illustrating a structure of a base station according to an embodiment of the disclosure.
  • FIG. 16 corresponds to the example of the gNB of FIG. 2.
  • the base station may include a transceiver 1610, a memory 1620, and a processor 1630.
  • the transceiver 1610, the memory 1620, and the processor 1630 of the base station may operate according to a communication method of the base station described above.
  • the components of the base station are not limited thereto.
  • the base station may include more or fewer components than those described above.
  • the processor 1630, the transceiver 1610, and the memory 1620 may be implemented as a single chip.
  • the processor 1630 may include at least one processor.
  • the transceiver 1610 collectively refers to a base station receiver and a base station transmitter, and may transmit/receive a signal to/from a terminal or a network entity.
  • the signal transmitted or received to or from the terminal or a network entity may include control information and data.
  • the transceiver 1610 may include a RF transmitter for up-converting and amplifying a frequency of a transmitted signal, and a RF receiver for amplifying low-noise and down-converting a frequency of a received signal.
  • the transceiver 1610 may receive and output, to the processor 1630, a signal through a wireless channel, and transmit a signal output from the processor 1630 through the wireless channel.
  • the memory 1620 may store a program and data required for operations of the base station. Also, the memory 1620 may store control information or data included in a signal obtained by the base station.
  • the memory 1620 may be a storage medium, such as read-only memory (ROM), random access memory (RAM), a hard disk, a CD-ROM, and a DVD, or a combination of storage media.
  • the processor 1630 may control a series of processes such that the base station operates as described above.
  • the transceiver 1610 may receive a data signal including a control signal transmitted by the terminal, and the processor 1630 may determine a result of receiving the control signal and the data signal transmitted by the terminal.
  • a user equipment (UE) in a wireless communication system comprising: at least one transceiver; at least one processor operably coupled to the at least one transceiver, and configured to: perform a channel access procedure to initiate a channel occupancy on a channel with shared spectrum channel access, determine that the channel occupancy is to be shared with at least one other UE, transmit a first sidelink transmission within the channel occupancy, and receive, from the at least one other UE, a second sidelink transmission within the channel occupancy after transmitting the first sidelink transmission.
  • UE user equipment
  • the second sidelink transmission is: a physical sidelink shared channel (PSSCH) or a physical sidelink control channel (PSCCH) conveying a unicast transmission to the UE; or a physical sidelink feedback channel (PSFCH) transmitted to the UE.
  • PSSCH physical sidelink shared channel
  • PSCCH physical sidelink control channel
  • PSFCH physical sidelink feedback channel
  • the channel access procedure to initiate the channel occupancy is a Type 1 sidelink channel access procedure, and a time duration spanned by sensing slots that are sensed to be idle before a sidelink transmission is random.
  • the at least one processor is further configured to: determine a gap in time domain between the first sidelink transmission and the second sidelink transmission within the channel occupancy, determine, based on a duration of the gap, a sidelink channel access procedure, and indicate the sidelink channel access procedure to the at least one other UE, wherein the sidelink channel access procedure is Type 2A, in case that the duration of the gap is at least 25 us, wherein the sidelink channel access procedure is Type 2B, in case that the duration of the gap is 16 us, and wherein the sidelink channel access procedure is Type 2C, in case that the duration of the gap is less than 16 us.
  • the second sidelink transmission starts immediately after sensing the channel to be idle for at least a sensing interval of 25 us; in case that the sidelink channel access procedure is Type 2B, the second sidelink transmission starts immediately after sensing the channel to be idle for at least a sensing interval of 16 us; and in case that the sidelink channel access procedure is Type 2C, the second sidelink transmission starts immediately without sensing the channel.
  • the first sidelink transmission is: a physical sidelink shared channel (PSSCH) or a physical sidelink control channel (PSCCH) conveying a unicast transmission to a first UE among the at least one other UE; or a PSSCH or a PSCCH conveying a groupcast transmission to the at least one other UE.
  • PSSCH physical sidelink shared channel
  • PSCCH physical sidelink control channel
  • the at least one processor is further configured to: transmit a third sidelink transmission within the channel occupancy after receiving the second sidelink transmission.
  • the at least one processor is further configured to: determine a gap in time domain between the second sidelink transmission and the third sidelink transmission within the channel occupancy, determine, based on a duration of the gap, a sidelink channel access procedure, and perform the sidelink channel access procedure, wherein the sidelink channel access procedure is Type 2A, in case that the duration of the gap is at least 25 us, wherein the sidelink channel access procedure is Type 2B, in case that the duration of the gap is 16 us, and wherein the sidelink channel access procedure is Type 2C, in case that the duration of the gap is less than 16 us.
  • the third sidelink transmission is: a physical sidelink shared channel (PSSCH) or a physical sidelink control channel (PSCCH) conveying a unicast transmission to a second UE among the at least one other UE; or a PSSCH or a PSCCH conveying a groupcast transmission to the at least one other UE.
  • PSSCH physical sidelink shared channel
  • PSCCH physical sidelink control channel
  • the first UE is the second UE.
  • a method of a user equipment (UE) in a wireless communication system comprising: performing a channel access procedure to initiate a channel occupancy on a channel with shared spectrum channel access; determining that the channel occupancy is to be shared with at least one other UE; transmitting a first sidelink transmission within the channel occupancy; and receiving, from the at least one other UE, a second sidelink transmission within the channel occupancy after transmitting the first sidelink transmission within the channel occupancy.
  • UE user equipment
  • the second sidelink transmission is: a physical sidelink shared channel (PSSCH) or a physical sidelink control channel (PSCCH) conveying a unicast transmission to the UE; or a physical sidelink feedback channel (PSFCH) transmitted to the UE.
  • PSSCH physical sidelink shared channel
  • PSCCH physical sidelink control channel
  • PSFCH physical sidelink feedback channel
  • the channel access procedure to initiate the channel occupancy is a Type 1 sidelink channel access procedure, and a time duration spanned by sensing slots that are sensed to be idle before a sidelink transmission is random.
  • the method further comprising: determining a gap in time domain between the first sidelink transmission and the second sidelink transmission within the channel occupancy; determining a sidelink channel access procedure based on a duration of the gap; and indicating the sidelink channel access procedure to the at least one other UE, wherein the sidelink channel access procedure is Type 2A, in case that the duration of the gap is at least 25 us, wherein the sidelink channel access procedure is Type 2B, in case that the duration of the gap is 16 us; and wherein the sidelink channel access procedure is Type 2C, in case that the duration of the gap is less than 16 us.
  • the second sidelink transmission starts immediately after sensing the channel to be idle for at least a sensing interval of 25 us; in case that the sidelink channel access procedure is Type 2B, the second sidelink transmission starts immediately after sensing the channel to be idle for at least a sensing interval of 16 us; and in case that the sidelink channel access procedure is Type 2C, the second sidelink transmission starts immediately without sensing the channel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La divulgation concerne un système de communication 5G ou 6G destiné à prendre en charge un débit de transmission de données supérieur. La divulgation concerne des appareils et des procédés pour un partage d'occupation de canal d'un équipement utilisateur (UE) avec une liaison latérale dans un système de communication sans fil. Un procédé d'un UE comprend la réalisation d'une procédure d'accès à un canal pour initier une occupation de canal sur un canal avec un accès au canal à spectre partagé et la détermination du fait que l'occupation de canal doit être partagée avec au moins un autre UE. Le procédé comprend en outre l'émission d'une première transmission de liaison latérale dans l'occupation de canal et la réception, en provenance dudit au moins un autre UE, d'une seconde transmission de liaison latérale dans l'occupation de canal après l'émission de la première transmission de liaison latérale dans l'occupation de canal.
PCT/KR2022/010801 2021-07-30 2022-07-22 Procédé et appareil de partage d'occupation de canal d'ue avec liaison latérale WO2023008845A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP22849821.8A EP4356681A1 (fr) 2021-07-30 2022-07-22 Procédé et appareil de partage d'occupation de canal d'ue avec liaison latérale
KR1020247007145A KR20240039034A (ko) 2021-07-30 2022-07-22 사이드링크를 통한 ue 채널 점유 공유 방법 및 장치
CN202280047860.3A CN117598011A (zh) 2021-07-30 2022-07-22 Ue的与侧链路的信道占用共享的方法和装置

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US202163227852P 2021-07-30 2021-07-30
US63/227,852 2021-07-30
US17/812,707 2022-07-14
US17/812,707 US20240023085A1 (en) 2022-07-14 2022-07-14 Method and apparatus of ue channel occupancy sharing with sidelink

Publications (1)

Publication Number Publication Date
WO2023008845A1 true WO2023008845A1 (fr) 2023-02-02

Family

ID=85087090

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2022/010801 WO2023008845A1 (fr) 2021-07-30 2022-07-22 Procédé et appareil de partage d'occupation de canal d'ue avec liaison latérale

Country Status (3)

Country Link
EP (1) EP4356681A1 (fr)
KR (1) KR20240039034A (fr)
WO (1) WO2023008845A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210067396A1 (en) * 2018-05-18 2021-03-04 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Duration of shortened semi-persistent scheduled intervals
US20210092783A1 (en) * 2019-09-25 2021-03-25 Qualcomm Incorporated Channel occupancy time (cot) sharing for sidelink
WO2021067958A1 (fr) * 2019-10-03 2021-04-08 Ofinno, Llc Répétition et préemption de signal de liaison latérale

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210067396A1 (en) * 2018-05-18 2021-03-04 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Duration of shortened semi-persistent scheduled intervals
US20210092783A1 (en) * 2019-09-25 2021-03-25 Qualcomm Incorporated Channel occupancy time (cot) sharing for sidelink
WO2021067958A1 (fr) * 2019-10-03 2021-04-08 Ofinno, Llc Répétition et préemption de signal de liaison latérale

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
MODERATOR (NOKIA): "Summary of [100b-e-NR-unlic-NRU-ChAcc-02] Email discussion/approval on clarifications to UL to DL COT sharing", 3GPP DRAFT; R1-2002934, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. e-meeting; 20200420 - 20200430, 28 April 2020 (2020-04-28), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051878637 *
QUALCOMM INCORPORATED: "FL summary for channel access mechanism for 52.6GHz-71GHz band", 3GPP DRAFT; R1-2009408, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. e-meeting ;20201026 - 20201113, 30 October 2020 (2020-10-30), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051948672 *

Also Published As

Publication number Publication date
EP4356681A1 (fr) 2024-04-24
KR20240039034A (ko) 2024-03-26

Similar Documents

Publication Publication Date Title
WO2022203388A1 (fr) Procédé et appareil de réception de canaux de liaison descendante dans un système inter-cellules
WO2023003414A1 (fr) Procédé et appareil d'attribution de ressources de liaison latérale dans un spectre sans licence
WO2022186643A1 (fr) Procédé et appareil d'indication de faisceau avec un format de dci associé à la dl
WO2023149750A1 (fr) Procédé et appareil de (re)sélection de porteuses candidates pour transmission en sl ca
WO2023158235A1 (fr) Procédé et appareil de détermination de fenêtre de transmission pour un canal physique de rétroaction de liaison latérale
WO2023211057A1 (fr) Appareil et procédé associé dans un système de communication sans fil
WO2023008962A1 (fr) Procédé et appareil de communication en liaison latérale dans un système de communication sans fil
WO2023128706A1 (fr) Procédé et appareil de réception et de transmission de données et d'informations de commande
WO2023059143A1 (fr) Procédés et dispositifs pour relayer des données
WO2022216057A1 (fr) Procédé et appareil pour la mesure de canal et de brouillage dans un système de communication sans fil
WO2022197064A1 (fr) Procédé et appareil de mesure et de rapport de csi apériodiques
WO2023008845A1 (fr) Procédé et appareil de partage d'occupation de canal d'ue avec liaison latérale
EP4158944A1 (fr) Procédés, terminaux et stations de base pour un transfert d'empreinte de faisceau
WO2023200252A1 (fr) Procédé et appareil destinés à l'initiation d'occupation de canal dans un accès à un canal de liaison latérale en mode semi-statique
WO2023182809A1 (fr) Procédé et appareil pour prendre en charge une rafale de découverte pour liaison latérale
WO2024025258A1 (fr) Procédé et appareil d'alignement de taille d'informations dci pour une cellule programmée avec de multiples cellules de programmation
WO2023113423A1 (fr) Procédé et appareil de répétition de canal et de signal de liaison montante dans un système de communication sans fil
WO2024072129A1 (fr) Procédé et dispositif de réception et de transmission d'informations
WO2023128477A1 (fr) Procédé et appareil de synchronisation d'indications de faisceau à porteuses croisées
WO2023191593A1 (fr) Procédé et appareil de transmission de signal dans un système de communication sans fil
WO2024096298A1 (fr) Procédé et appareil de gestion de collision dans un système de communication sans fil
WO2023158244A1 (fr) Procédé et dispositifs de réception et de transmission d'informations
WO2023132661A1 (fr) Procédé et appareil d'indication d'occupation de canal sur une liaison latérale dans un système de communication sans fil
WO2023224373A1 (fr) Procédé et appareil de détermination d'un état de tci
WO2023211219A1 (fr) Procédé et dispositif de réception et de transmission d'informations

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22849821

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 202280047860.3

Country of ref document: CN

WWE Wipo information: entry into national phase

Ref document number: 2022849821

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 2022849821

Country of ref document: EP

Effective date: 20240117

ENP Entry into the national phase

Ref document number: 20247007145

Country of ref document: KR

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE