WO2023193262A1 - Procédés, dispositifs et support lisible par ordinateur destinés à la communication - Google Patents

Procédés, dispositifs et support lisible par ordinateur destinés à la communication Download PDF

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Publication number
WO2023193262A1
WO2023193262A1 PCT/CN2022/085950 CN2022085950W WO2023193262A1 WO 2023193262 A1 WO2023193262 A1 WO 2023193262A1 CN 2022085950 W CN2022085950 W CN 2022085950W WO 2023193262 A1 WO2023193262 A1 WO 2023193262A1
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Prior art keywords
sidelink
channel
terminal device
access procedure
channel access
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PCT/CN2022/085950
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English (en)
Inventor
Ying Zhao
Zhaobang MIAO
Gang Wang
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Nec Corporation
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Priority to PCT/CN2022/085950 priority Critical patent/WO2023193262A1/fr
Publication of WO2023193262A1 publication Critical patent/WO2023193262A1/fr

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    • 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
    • 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]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/25—Control channels or signalling for resource management between terminals via a wireless link, e.g. sidelink

Definitions

  • Embodiments of the present disclosure generally relate to the field of telecommunication, and in particular, to methods, devices, and computer readable medium for communication.
  • sidelink communication has been proposed.
  • Sidelink is a feature aiming at enabling device-to-device (D2D) communications.
  • D2D device-to-device
  • sidelink Unlike uplink or downlink, sidelink enables a direct communication between proximal user equipments (UEs) , and data does not need to go through the network device.
  • UEs proximal user equipments
  • Sidelink technology With significant speeds, coupled with extremely low latency, there’s a lot of interest in Sidelink technology. Thus, it is worth further studying the sidelink communications.
  • example embodiments of the present disclosure provide a solution for communication.
  • a method for communication comprises receiving, at a terminal device, a configuration indicating a plurality of resources in frequency domain for sidelink transmission; performing a channel access procedure on one or more sidelink channels, wherein each of the one or more sidelink channels is associated with a subset of the plurality of resources in frequency domain; and in accordance with a determination that the channel access procedure on at least one sidelink channel in the one or more sidelink channels is successful, performing a sidelink transmission on the at least one sidelink channel.
  • a method for communication comprises receiving, at a second terminal device in a group of terminal devices, a configuration comprising a plurality of resources in frequency domain for sidelink transmission and an indication regarding monitoring a signal indicating a channel occupancy sharing among the group of terminal devices; monitoring, on one or more sidelink channels, the signal, wherein each of the one or more sidelink channels is associated with a subset of the plurality of resources in frequency domain; in accordance with a determination that the signal is received on at least one sidelink channel in the one or more sidelink channels, performing a sidelink transmission on the at least one sidelink channel.
  • a terminal device comprising a processing unit; and a memory coupled to the processing unit and storing instructions thereon, the instructions, when executed by the processing unit, causing the terminal device to perform acts comprising: receiving a configuration indicating a plurality of resources in frequency domain for sidelink transmission; performing a channel access procedure on one or more sidelink channels, wherein each of the one or more sidelink channels is associated with a subset of the plurality of resources in frequency domain; and in accordance with a determination that the channel access procedure on at least one sidelink channel in the one or more sidelink channels is successful, performing a sidelink transmission on the at least one sidelink channel.
  • a terminal device comprising a processing unit; and a memory coupled to the processing unit and storing instructions thereon, the instructions, when executed by the processing unit, causing the terminal device to perform acts comprising: receiving, at a second terminal device in a group of terminal devices, a configuration comprising a plurality of resources in frequency domain for sidelink transmission and an indication regarding monitoring a signal indicating a channel occupancy sharing among the group of terminal devices; monitoring, on one or more sidelink channels, the signal, wherein each of the one or more sidelink channels is associated with a subset of the plurality of resources in frequency domain; in accordance with a determination that the signal is received on at least one sidelink channel in the one or more sidelink channels, performing a sidelink transmission on the at least one sidelink channel.
  • a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to carry out the method according to the first or second aspect.
  • FIGs. 1A and 1B are schematic diagrams of communication environments in which embodiments of the present disclosure can be implemented;
  • Figs. 2A and 2B show schematic diagrams of sidelink slot structures according to some embodiments of the present disclosure, respectively;
  • Fig. 3 shows a schematic diagram of sidelink slots according to some embodiments of the present disclosure
  • Fig. 4 is a flowchart of an example method in accordance with an embodiment of the present disclosure.
  • Figs. 5A and 5B show schematic diagrams of sidelink resources according to some embodiments of the present disclosure, respectively;
  • Fig. 6 is a flowchart of an example method in accordance with an embodiment of the present disclosure.
  • Fig. 7 illustrates a signaling flow for communications according to some embodiments of the present disclosure
  • Figs. 8A-8E show schematic diagrams of channel access procedures according to some embodiments of the present disclosure, respectively;
  • Fig. 9 illustrates a signaling flow for communications according to some embodiments of the present disclosure
  • Figs. 10A-10B show schematic diagrams of channel access procedures according to some embodiments of the present disclosure, respectively;
  • Fig. 11 illustrates a signaling flow for communications according to some embodiments of the present disclosure
  • Figs. 12A-12E show schematic diagrams of channel access procedures according to some embodiments of the present disclosure, respectively.
  • Fig. 13 is a simplified block diagram of a device that is suitable for implementing embodiments of the present disclosure.
  • terminal device refers to any device having wireless or wired communication capabilities.
  • the terminal device include, but not limited to, user equipment (UE) , personal computers, desktops, mobile phones, cellular phones, smart phones, personal digital assistants (PDAs) , portable computers, tablets, wearable devices, internet of things (IoT) devices, Ultra-reliable and Low Latency Communications (URLLC) devices, Internet of Everything (IoE) devices, machine type communication (MTC) devices, device on vehicle for V2X communication where X means pedestrian, vehicle, or infrastructure/network, devices for Integrated Access and Backhaul (IAB) , Space borne vehicles or Air borne vehicles in Non-terrestrial networks (NTN) including Satellites and High Altitude Platforms (HAPs) encompassing Unmanned Aircraft Systems (UAS) , eXtended Reality (XR) devices including different types of realities such as Augmented Reality (AR) , Mixed Reality (MR) and Virtual Reality (VR) , the unmanned aerial vehicle (UAV)
  • UE user equipment
  • the ‘terminal device’ can further has ‘multicast/broadcast’ feature, to support public safety and mission critical, V2X applications, transparent IPv4/IPv6 multicast delivery, IPTV, smart TV, radio services, software delivery over wireless, group communications and IoT applications. It may also incorporate one or multiple Subscriber Identity Module (SIM) as known as Multi-SIM.
  • SIM Subscriber Identity Module
  • the term “terminal device” can be used interchangeably with a UE, a mobile station, a subscriber station, a mobile terminal, a user terminal or a wireless device.
  • the terms “terminal device” , “communication device” , “terminal” , “user equipment” and “UE” may be used interchangeably.
  • the terminal device or the network device may have Artificial Intelligence (AI) or Machine Learning (ML) capability. It generally includes a model which has been trained from numerous collected data for a specific function, and can be used to predict some information.
  • AI Artificial Intelligence
  • ML Machine Learning
  • the terminal or the network device may work on several frequency ranges, e.g. FR1 (410 MHz –7125 MHz) , FR2 (24.25GHz to 71GHz) , frequency band larger than 100GHz as well as Terahertz (THz) . It can further work on licensed/unlicensed/shared spectrum.
  • the terminal device may have more than one connection with the network devices under Multi-Radio Dual Connectivity (MR-DC) application scenario.
  • MR-DC Multi-Radio Dual Connectivity
  • the terminal device or the network device can work on full duplex, flexible duplex and cross division duplex modes.
  • network device refers to a device which is capable of providing or hosting a cell or coverage where terminal devices can communicate.
  • a network device include, but not limited to, a Node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , a next generation NodeB (gNB) , a transmission reception point (TRP) , a remote radio unit (RRU) , a radio head (RH) , a remote radio head (RRH) , an IAB node, a low power node such as a femto node, a pico node, a reconfigurable intelligent surface (RIS) , and the like.
  • NodeB Node B
  • eNodeB or eNB evolved NodeB
  • gNB next generation NodeB
  • TRP transmission reception point
  • RRU remote radio unit
  • RH radio head
  • RRH remote radio head
  • IAB node a low power node such as a fe
  • the terminal device may be connected with a first network device and a second network device.
  • One of the first network device and the second network device may be a master node and the other one may be a secondary node.
  • the first network device and the second network device may use different radio access technologies (RATs) .
  • the first network device may be a first RAT device and the second network device may be a second RAT device.
  • the first RAT device is eNB and the second RAT device is gNB.
  • Information related with different RATs may be transmitted to the terminal device from at least one of the first network device and the second network device.
  • first information may be transmitted to the terminal device from the first network device and second information may be transmitted to the terminal device from the second network device directly or via the first network device.
  • information related with configuration for the terminal device configured by the second network device may be transmitted from the second network device via the first network device.
  • Information related with reconfiguration for the terminal device configured by the second network device may be transmitted to the terminal device from the second network device directly or via the first network device.
  • Communications discussed herein may use conform to any suitable standards including, but not limited to, New Radio Access (NR) , Long Term Evolution (LTE) , LTE-Evolution, LTE-Advanced (LTE-A) , Wideband Code Division Multiple Access (WCDMA) , Code Division Multiple Access (CDMA) , cdma2000, and Global System for Mobile Communications (GSM) and the like.
  • NR New Radio Access
  • LTE Long Term Evolution
  • LTE-Evolution LTE-Advanced
  • LTE-A LTE-Advanced
  • WCDMA Wideband Code Division Multiple Access
  • CDMA Code Division Multiple Access
  • GSM Global System for Mobile Communications
  • Examples of the communication protocols include, but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.85G, the third generation (3G) , the fourth generation (4G) , 4.5G, the fifth generation (5G) , and the sixth (6G) communication protocols.
  • the techniques described herein may be used for the wireless networks and radio technologies mentioned above as well as other wireless networks and radio technologies.
  • the embodiments of the present disclosure may be performed according to any generation communication protocols either currently known or to be developed in the future.
  • Examples of the communication protocols include, but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the fourth generation (4G) , 4.5G, the fifth generation (5G) communication protocols, 5.5G, 5G-Advanced networks, or the sixth generation (6G) networks.
  • circuitry used herein may refer to hardware circuits and/or combinations of hardware circuits and software.
  • the circuitry may be a combination of analog and/or digital hardware circuits with software/firmware.
  • the circuitry may be any portions of hardware processors with software including digital signal processor (s) , software, and memory (ies) that work together to cause an apparatus, such as a terminal device or a network device, to perform various functions.
  • the circuitry may be hardware circuits and or processors, such as a microprocessor or a portion of a microprocessor, that requires software/firmware for operation, but the software may not be present when it is not needed for operation.
  • the term circuitry also covers an implementation of merely a hardware circuit or processor (s) or a portion of a hardware circuit or processor (s) and its (or their) accompanying software and/or firmware.
  • values, procedures, or apparatus are referred to as “best, ” “lowest, ” “highest, ” “minimum, ” “maximum, ” or the like. It will be appreciated that such descriptions are intended to indicate that a selection among many used functional alternatives can be made, and such selections need not be better, smaller, higher, or otherwise preferable to other selections.
  • the sidelink needs to be supported on unlicensed spectrum for both mode 1 and mode 2 sidelink communication resources allocation methods where Uu operation for mode 1 is limited to licensed spectrum only.
  • resources for sidelink communications can be scheduled by a network device, which is referred to as mode 1.
  • resources for sidelink communication can also be determined by UE itself, which is referred to as mode 2.
  • channel access mechanisms from new radio unlicensed may also be reused for sidelink unlicensed operation.
  • NR-U new radio unlicensed
  • the channel access mechanisms are designed for the sidelink communications on the unlicensed spectrum.
  • a channel access procedure is applied to initiate a channel occupancy for a physical sidelink feedback channel (PSFCH) transmission (s) in a slot by a single UE or multiple UEs, it is not clear how to realize more reliable PSFCH transmission under the effect of a listen before talk (LBT) procedure or a clear channel assessment (CCA) procedure. If no channel occupancy can be shared based on preceding transmission, the intended PSFCH transmission (s) from single or multiple UEs may be held back due to a failed Type 1 channel access procedure.
  • PSFCH physical sidelink feedback channel
  • LBT listen before talk
  • CCA clear channel assessment
  • LBT listen before talk
  • CCA clear channel assessment
  • a network device or a transmitting terminal device transmits a configuration indicating a plurality of resources on a shared spectrum for sidelink transmission to a receiving terminal device.
  • the receiving terminal device performs a channel access procedure on one or more sidelink channels. If the channel access procedure on at least one sidelink channel is successful, the receiving terminal device performs a sidelink transmission on the at least one sidelink channel. In this way, a more reliable PSFCH transmission under the effect of channel access procedure has been achieved.
  • it can facilitate the channel access for PSFCH transmissions from different UEs in the same slot. Further, it also can avoid a potential collision between PSFCH transmissions on the same time-frequency resources from different UEs/group.
  • Figs. 1A and 1B illustrate schematic diagrams of a communication system in which embodiments of the present disclosure can be implemented.
  • the communication system 100 which is a part of a communication network, comprises a terminal device 110-1, a terminal device 110-2, a terminal device 110-3, ..., a terminal device 110-N, which can be collectively referred to as “terminal device (s) 110. ”
  • the number N can be any suitable integer number.
  • the interface among terminal devices 110 may be called PC5 interface.
  • the term “transmitting (TX) UE/terminal device” used herein can refer to a UE which can transmit data to another UE when performing sidelink communications with the other UE.
  • RX UE/terminal device can refer to a UE which can receive data from another UE when performing sidelink communications with the other UE.
  • the terminal devices 110 may support one or more of: unicast, groupcast or broadcast.
  • the communication system 100 further comprises a network device.
  • the network device 120 and the terminal devices 110 can communicate data and control information to each other.
  • the terminal devices 110 can also communicate with each other.
  • the numbers of terminal devices shown in Fig. 1 are given for the purpose of illustration without suggesting any limitations.
  • the interface between the terminal device110 and the network device 120 may be called Uu interface.
  • Communications in the communication system 100 may be implemented according to any proper communication protocol (s) , comprising, but not limited to, cellular communication protocols of the first generation (1G) , the second generation (2G) , the third generation (3G) , the fourth generation (4G) and the fifth generation (5G) and on the like, wireless local network communication protocols such as Institute for Electrical and Electronics Engineers (IEEE) 802.11 and the like, and/or any other protocols currently known or to be developed in the future.
  • s cellular communication protocols of the first generation (1G) , the second generation (2G) , the third generation (3G) , the fourth generation (4G) and the fifth generation (5G) and on the like, wireless local network communication protocols such as Institute for Electrical and Electronics Engineers (IEEE) 802.11 and the like, and/or any other protocols currently known or to be developed in the future.
  • IEEE Institute for Electrical and Electronics Engineers
  • the communication may utilize any proper wireless communication technology, comprising but not limited to: Code Divided Multiple Address (CDMA) , Frequency Divided Multiple Address (FDMA) , Time Divided Multiple Address (TDMA) , Frequency Divided Duplexer (FDD) , Time Divided Duplexer (TDD) , Multiple-Input Multiple-Output (MIMO) , Orthogonal Frequency Divided Multiple Access (OFDMA) and/or any other technologies currently known or to be developed in the future.
  • CDMA Code Divided Multiple Address
  • FDMA Frequency Divided Multiple Address
  • TDMA Time Divided Multiple Address
  • FDD Frequency Divided Duplexer
  • TDD Time Divided Duplexer
  • MIMO Multiple-Input Multiple-Output
  • OFDMA Orthogonal Frequency Divided Multiple Access
  • Embodiments of the present disclosure can be applied to any suitable scenarios.
  • embodiments of the present disclosure can be implemented at reduced capability NR devices.
  • embodiments of the present disclosure can be implemented in one of the followings: NR multiple-input and multiple-output (MIMO) , NR sidelink enhancements, NR systems with frequency above 52.6GHz, an extending NR operation up to 71GHz, narrow band-Internet of Thing (NB-IOT) /enhanced Machine Type Communication (eMTC) over non-terrestrial networks (NTN) , NTN, UE power saving enhancements, NR coverage enhancement, NB-IoT and LTE-MTC, Integrated Access and Backhaul (IAB) , NR Multicast and Broadcast Services, or enhancements on Multi-Radio Dual-Connectivity.
  • MIMO multiple-input and multiple-output
  • NR sidelink enhancements NR systems with frequency above 52.6GHz, an extending NR operation up to 71GHz
  • NB-IOT narrow band-Internet of
  • slot refers to a dynamic scheduling unit. One slot comprises a predetermined number of symbols.
  • the term “downlink (DL) sub-slot” may refer to a virtual sub-slot constructed based on uplink (UL) sub-slot.
  • the DL sub-slot may comprise fewer symbols than one DL slot.
  • the slot used herein may refer to a normal slot which comprises a predetermined number of symbols and also refer to a sub-slot which comprises fewer symbols than the predetermined number of symbols.
  • resources for sidelink communications can be scheduled by a network device, which is referred to as mode 1.
  • a network device which is referred to as mode 1.
  • the terminal devices 110 are in the coverage of the network device 120.
  • the network device 120 can schedule the resources for the sidelink communications.
  • resources for sidelink communication can also be determined by UE itself, which is referred to as mode 2.
  • the inter-UE coordination is proposed for mode 2 resource allocation to improve reliability where one of the UEs determines a set of resources and transmits such set of resources to another UE which takes them into consideration when performing resource selection for its own transmission.
  • the terminal devices 110-1 and 110-2 are out of the coverage of the network device 120.
  • the terminal device 110-1 can schedule the resources for the sidelink communications.
  • the terminal devices 110 may be configured with sidelink bandwidth part (BWP) .
  • BWP sidelink bandwidth part
  • the terminal device 110 may receive a configuration indicating a subcarrier spacing (SCS) and a cyclic prefix (CP) type.
  • SCS subcarrier spacing
  • CP cyclic prefix
  • Such configuration may be common to the terminal devices.
  • the configuration may be preconfigured.
  • the configuration may be semi-static configured.
  • the terminal devices 110 may support one or more of: unicast/groupcast/broadcast supported in one resource pool.
  • Sidelink channels can be defined within a resource pool.
  • the sidelink channels may comprise one or more of: physical sidelink control channel (PSCCH) , physical sidelink shared channel (PSSCH) , or physical sidelink feedback channel (PSFCH) .
  • the sidelink resource configuration may be slot level.
  • the sidelink resource configuration may be indicated by bitmap indication.
  • the sidelink resource configuration may be per pool.
  • a sidelink resource configuration may be symbol level.
  • the sidelink resource configuration may be indicated by parameters “sl-StartSymbol” and “sl-LengthSymbols. ”
  • the sidelink resource configuration may be per bandwidth part (BWP) .
  • BWP bandwidth part
  • Fig. 2A shows an example structure of a sidelink slot.
  • the slot 210 may comprise 14 symbols. It should be noted that the slot may comprise less than 14 symbols or more than 14 symbols.
  • the slot 210 may comprise an automatic gain control (AGC) symbol (for example, symbol 0) which is a duplicate of the subsequent symbol (for example, symbol 1) .
  • AGC automatic gain control
  • Some symbols (for example, symbols 1, 2 and 3) in the slot 210 may be allocated for physical sidelink control channel (PSCCH) and some symbols (for example, symbols 1, 2, 3, 4, 5, 6, 7, 8 and 9) in the slot 210 may be allocated for physical sidelink shared channel (PSSCH) .
  • PSCCH physical sidelink control channel
  • PSSCH physical sidelink shared channel
  • the slot 210 may also comprise one or more guard period (GP) symbols (for example, symbols 10 and 13) .
  • the slot 210 may comprise another AGC symbol (for example, symbol 11) .
  • the slot may also comprise a symbol for PSFCH which carries feedback information related to sidelink data and/or sidelink control information.
  • Fig. 2B shows an example of resource allocation for the sidelink slot.
  • the resources allocation may be based on interlaced resource block (IRB) .
  • IRB interlaced resource block
  • resources in frequency domain may be divided in to a plurality of sets of resources.
  • each set of resources may comprise 5 physical resource blocks (PRBs) which are labelled as 0, 1, 2, 3, and 4.
  • PRBs physical resource blocks
  • the PSCCH, PSSCH and PSFCH may comprise one or more PRBs in each set of resources, which means that the resources allocated for sidelink channels are interlaced.
  • the PSFCH may carry sidelink acknowledgment/non-acknowledgment (A/N) for sidelink unicast or sidelink groupcast.
  • A/N sidelink acknowledgment/non-acknowledgment
  • the configuration of PSFCH may indicate a period of the PSFCH and timing related to PSSCH.
  • the period may comprise one of: 0, 1, 2 or 4 slots.
  • the timing related PSSCH (represented as “K” ) may comprise 2 or 3 slots. Only as an example, as shown in Fig. 3, the PSFCH period may comprise 2 slots and the K may be 2.
  • Fig. 4 shows a flowchart of an example method 400 in accordance with an embodiment of the present disclosure.
  • the method 400 can be implemented at any suitable terminal devices. Only for the purpose of illustrations, the method 400 can be implemented at a terminal device 110-1 as shown in Figs. 1A and 1B.
  • the method 400 is a generic process. Details of embodiments are described later.
  • the terminal device 110-1 receives a configuration indicating a plurality of resources on a shared spectrum for sidelink transmission.
  • the terminal device 110-1 may receive the configuration from the network device 120.
  • the configuration may be transmitted via RRC signaling.
  • the terminal device 110-1 may receive the configuration from a TX terminal device (for example, the terminal device 110-3) .
  • the configuration may be indicated in sidelink control information (SCI) from the terminal device 110-3.
  • SCI sidelink control information
  • a LBT band may comprise a number of resources (for example, PRBs) and the LBT band may correspond to a sidelink channel. For example, if there are two LBT bands, each of the LBT band may be associated with one sidelink channel. In this way, it improves successful transmission probability of the sidelink transmission.
  • resources may be allocated for PSFCH transmission. For example, with the same symbols in a slot, one PSFCH resource within a nominal channel bandwidth may be expanded to N PSFCH resources locating at N frequency bands respectively. Each frequency band/channel may satisfy the occupied channel bandwidth (OCB) requirement with LBT bandwidth at least.
  • the resources may be interlaced resource block (IRB) based. Alternatively, the resources may not be IRB based.
  • PSFCHs may be classified with different priorities. For example, the original PSFCH may have the highest priority. The additional PSFCHs close to the original PSFCH in frequency domain may have low priority.
  • additional PSFCH may have different PSSCH-to-PSFCH resources mapping relation, namely frequency hopping or different pattern may be applied.
  • Different PSFCHs may be adjacent to each other in frequency domain or separately distributed (within a resource pool) .
  • the PSFCH period may comprise 4 slots and K may be 2.
  • the feedback information for the PSCCH/PSSCH 530, PSCCH/PSSCH 531 and PSCCH/PSSCH 532 may be transmitted in PSFCH 521 and/or PSFCH 522.
  • the PSFCH 521 may be associated with a subset of resources, for example, the resources 541.
  • the PSFCH 522 may be associated with a subset of resources, for example, the frequency resources 542. In some embodiments, the PSFCH 521 may have a higher priority than the PSFCH 522.
  • multiple resources locating at different frequency bands for PSFCH transmissions may be shared corresponding to multiple PSSCH/PSCCH transmissions.
  • the feedback information for each PSSCH/PSCCH transmission may be transmitted over multiple shared resources.
  • Each channel for PSFCH transmission may satisfy the OCB requirement with LBT bandwidth at least.
  • the resources may be interlaced resource block (IRB) based.
  • the resources may not be IRB based.
  • PSFCHs may be classified with different priorities. For example, the original PSFCH may have the highest priority. The additional PSFCHs close to the original PSFCH in frequency domain may have low priority.
  • multiple PSFCHs transmitted over separate resources may have different PSSCH-to-PSFCH resources mapping relation, namely frequency hopping or different pattern may be applied.
  • Different PSFCHs may be adjacent to each other in frequency domain or separately distributed (within a resource pool) .
  • the PSFCH period may comprise 4 slots and K may be 2.
  • the feedback information for the PSCCH/PSSCH 530, PSCCH/PSSCH 531 and PSCCH/PSSCH 532 may be transmitted in PSFCH 521 and/or PSFCH 522.
  • the feedback information for the PSCCH/PSSCH 533, PSCCH/PSSCH 534 and PSCCH/PSSCH 535 may be transmitted in PSFCH 521 and/or PSFCH 522.
  • the resources 541 may be referred to as a first LBT band and the resources 542 may be referred to as a second LBT band.
  • the PSCCH/PSSCH 530 and PSFCH 520 may be associated with the first LBT band.
  • the PSCCH/PSSCH 533 and PSFCH 523 may be associated with the second LBT band.
  • the terminal device 110-1 performs a channel access procedure on one or more sidelink channels.
  • the terminal device 110-1 may perform a LBT procedure on the one or more sidelink channels.
  • the terminal device 110-1 may perform a clear channel assessment on the one or more sidelink channels.
  • the terminal device 110-1 may perform a Type 1 channel access procedure on the one or more sidelink channels.
  • the terminal device 110-1 may perform a Type 1 channel access procedure on one sidelink channels and perform a Type 2 channel access procedure on other sidelink channels.
  • the sensing duration of the Type 1 channel access procedure may be uncertain.
  • the terminal device 110-1 may transmit the transmission using Type 1 channel access procedure after first sensing the channel to be idle during the slot durations of a defer duration Td, and after the counter N is zero in step 4 shown in Table 1 below.
  • the counter N may be adjusted by sensing the channel for additional slot duration (s) the steps shown in Table 1 below.
  • T d T f +m p *T sl .
  • an ideal sensing duration for Type 1 channel access procedure may be described as T d +T sl *rand [0, CW] , where rand means that a number between 0 and contention window (CW) is randomly selected .
  • the terminal device 110-1 may transmit a transmission on the channel, if the channel is sensed to be idle at least in a sensing slot duration T sl when the terminal device 110-1is ready to transmit the transmission and if the channel has been sensed to be idle during all the slot durations of a defer duration T d immediately before the transmission.
  • Table 2 shows an example of channel access priority class (CAPC) for SL.
  • the sensing duration of the Type 1 channel access procedure may be uncertain.
  • the sensing durations of the channel access procedure on different sidelink channels may be different.
  • the terminal device 110-1 may determine cyclic prefix extensions (CPEs) for the sidelink channels.
  • CPEs cyclic prefix extensions
  • the terminal device 110-1 may determine a first CPE for the first sidelink channel and a second CPE for the second sidelink channel.
  • the first CPE and the second CPE may be used to adapt to effect of uncertain sensing durations of the channel access procedure for the first and second sidelink channels.
  • the terminal device 110-1 may use the first CPE and the second CPE to match the gap between a successful channel access procedure for the first or the second sidelink channel and the starting point of intended sidelink transmission on the first or the second channel.
  • the first CPE may be longer than the second CPE.
  • the time-continuous signal for the interval preceding the first symbol for the sidelink transmission may be given by: where t ⁇ 0 refers to the signal in the previous subframe.
  • the terminal device 110-1 performs a sidelink transmission on the at least one sidelink channel.
  • the sidelink transmission may comprise sidelink data, for example, the transmission on PSSCH.
  • the sidelink transmission may comprise sidelink control information, for example, the transmission on PSCCH.
  • the sidelink transmission may comprise feedback information, for example, the transmission on PSFCH.
  • the terminal device 110-1 may perform a Type 1 channel access procedure on one sidelink channels and perform a Type 2 channel access procedure on other sidelink channels. In this case, when both the Type 1 channel access procedure and the Type 2 channel access procedure are successful, the terminal device 110-1 may perform the sidelink transmission on the sidelink channels.
  • the terminal device 110-1 may intend to transmit all PSFCHs aiming at a reliable ACK/NACK transmission (for example, previous deferred feedback may be included, or multiple resource pools corresponding to different PSFCHs may be involved and so on) , the terminal device 110-1 may perform N channel access procedures corresponding to N PSFCHs.
  • a PSFCH may be selected by the terminal device 110-1 uniformly randomly out of N PSFCHs corresponding to which a Type 1 channel access procedure is performed.
  • the other PSFCHs can be accessed by parallel performing Type 2 channel access procedures immediately before the terminal device 110-1 transmission on the PSFCH based on a successful Type 1 channel access procedure.
  • the starting points of potential transmissions on all PSFCHs may be aligned.
  • ACK/NACK feedbacks on all PSFCHs or none PSFCH may be transmitted depending on the results of multiple channel access procedures, namely only if all channel access procedures for all PSFCHs are successful, all PSFCHs may be transmitted, otherwise no PSFCH can be transmitted.
  • different CPEs may be determined for sidelink channels.
  • the terminal device 110-1 may transmit the first CPE and the sidelink transmission on the first sidelink channel.
  • the terminal device 110-1 may transmit the second CPE and the sidelink transmission on the second sidelink channel.
  • the terminal device 110-1 may access multiple PSFCHs.
  • the result of channel access procedure on one PSFCH may not have effect on the other PSFCHs. If the terminal device 110-1 has the capability to sense and transmit on different PSFCH resources at the same time, the starting points of potential transmissions on all PSFCHs may not be naturally aligned.
  • the terminal device 110-1 may select/determine a suitable CPE based on configured multiple candidate CPEs with different length or based on configured maximum CPE length to adapt to uncertain sensing duration on respective PSFCH, e.g. a PSFCH with higher priority may be configured/indicated a longer maximum CPE length or more applicable candidate CPEs and have a higher access probability.
  • the terminal device 110-1 may perform additional sensing on sidelink channels. For example, if a first channel access procedure on the first sidelink channel and a second channel access procedure on the second sidelink channel are successful, the terminal device 110-1 may perform a first additional sensing on the first sidelink channel before the sidelink transmission on the first sidelink channel. Alternatively or in addition, the terminal device 110-1 may perform a second additional sensing on the second sidelink channel before the sidelink transmission on the second sidelink channel. For example, the starting points of potential transmissions on all PSFCHs may be aligned based on the same CPE length or no CPE for all PSFCHs.
  • PSFCH Physical Downlink Control Channel
  • the terminal device 110-1 may perform multiple independent Type 1 channel access procedures corresponding to multiple PSFCH for this terminal device 110-1.
  • Multiple FDMed PSFCHs transmissions from different terminal devices may be aligned with a common starting point based on a prefixed CPE or no CPE.
  • the channel access procedures on the sidelink channels may be independent.
  • the terminal device 110-1 may perform a Type 1 channel access procedure on the sidelink channels.
  • the terminal device 110-1 may transmit the feedback information on this sidelink channel regardless of the channel access procedures on other sidelink channels.
  • the terminal device 110-1 may stop the channel access procedures on other sidelink channels. For example, if each PSFCH carries the same feedback information, the terminal device 110-1 may transmit all feedback information through any PSFCH based on a successful channel access procedures corresponding to this PSFCH.
  • the terminal device 110-1 may stop all channel access procedures and start to transmit on the PSFCH (with the highest priority) .
  • a PSFCH with higher priority may be configured/indicated a CPE with longer maximum length or more applicable candidate CPEs with different length.
  • the terminal device 110-1 may be in a group of terminal devices.
  • the terminal devices 110-1, 110-2, 110-3 and 110-N may be in the same group of terminal devices.
  • each terminal device may or may not perform the Type 1 channel access procedure to access the channel.
  • the terminal device 110-1 may receive a CPE indication for the feedback information. In this case, if the channel access procedure is successful on the at least one sidelink channel, the terminal device 110-1 may perform the sidelink transmission on the at least one sidelink channel based on the CPE indication. In other words, the terminal device 110-1 may transmit the feedback information after the successful channel access procedure. In this case, in some embodiments, the terminal device 110-1 may transmit a third CPE on the at least one sidelink channel before the sidelink transmission on the at least one sidelink channel. Alternatively or in addition, the terminal device 110-1 may performing a third additional sensing on the at least one sidelink channel before the sidelink transmission.
  • starting points of the transmissions for feedback information transmitted by respective terminal devices in the group may be aligned based on the third CPE.
  • starting points of the transmissions for feedback information transmitted by respective terminal devices in the group may be aligned based on a duration of the third additional sensing.
  • the channel occupancy initiated by the terminal device 110-1 cannot be shared among the terminal devices which are intending to transmit on PSFCH in the same PSFCH period.
  • each terminal device may perform separate Type 1 channel access procedure with independent counter and contention window.
  • the starting points of potential transmissions from all terminal devices may be aligned based on the same CPE or no CPE for all PSFCHs.
  • receiving terminal devices in the terminal device group related to certain PSFCH and shared with the terminal device intending to transmit on PSFCH in the same PSFCH period if there is no PSSCH transmission immediately before the intending PSFCH, a certain number of terminal devices may perform independent Type 1 channel access procedures before the GP between PSSCH and PSFCH.
  • the certain number of terminal devices may be uniformly randomly selected in a group of terminal devices by transmitting terminal device (for example, the terminal device 110-3) and indicated in the SCI.
  • the terminal device 110-1 may receive an indication which informs that terminal device 110-1 to perform the channel access procedure and transmit a signal according to a result of the channel access procedure.
  • the signal may indicate a channel occupancy sharing among the group of terminal devices for sidelink transmissions.
  • the signal can be referred to as a filler signal or a channel occupancy sharing indication signal.
  • the signal may be indicated in SCI.
  • such indication may inform the terminal device 110-1 to perform the channel access procedure.
  • the terminal device 110-1 may transmit the signal to other terminal device, for example, the terminal devices 110-2 and/or 110-3.
  • the terminal device 110-1 may immediately transmit the filler signal during the GP symbol (and the first half of AGC symbol) before PSFCH to initiate a channel occupancy and indicate channel occupancy information to the other related terminal devices.
  • the terminal device 110-1 may transmit the filler signal on the first and second sidelink channels to other terminal devices in the group of terminal devices upon the first and second channel access procedures being successful.
  • the terminal device 110-1 may transmit the filler signal on the first sidelink channel regardless of the second channel access procedure. In this case, the terminal device 110-1 may stop the second channel access procedure.
  • a PSFCH may be selected by the terminal device 110-1 uniformly randomly out of N PSFCHs on which the Type 1 channel access procedure is performed.
  • the terminal device 110-1 can assess the other PSFCHs by parallel performing Type 2 channel access procedures immediately before the transmission on the PSFCH based on a successful Type 1 channel access procedure.
  • the starting points of potential transmissions on all PSFCHs from terminal devices may be aligned.
  • the terminal device 110-1 may first transmit the filler signal to initiate the channel occupancy and indicate to the other terminal devices in the group.
  • the same rule for starting point and length of filler signal may be applied, and each terminal device may start to transmit respective FDMed PSFCHs at the same starting point based on the transmitting/reception of the filler signal.
  • At least a receiving UE may perform N independent/dependent (with different counter and contention window or with same counter and contention window) Type 1 channel access procedures at the same time.
  • the terminal device 110-1 and the other terminal devices in the group stop other Type 1 channel access procedures.
  • the terminal device 110-1 may first transmit the filler signal to initiate the channel occupancy and indicate to the other terminal devices in the group. The same rule for starting point and length of filler signal may be applied, and each terminal device may start to transmit respective PSFCHs at the same starting point based on the transmitting/reception of signal.
  • the terminal device 110-1 may perform one or multiple independent/dependent Type 1 channel access procedures.
  • another terminal device may perform one or multiple PSFCHs independent/dependent Type 1 channel access procedures corresponding to other FDMed PSFCHs.
  • the terminal devices by which Type 1 channel access procedures corresponding to all PSFCHs are performed may be uniformly randomly selected by transmitting terminal device and indicated in the SCI. Each channel access procedure may use different/the same counter and contention window as that of other Type 1 channel access procedures.
  • the terminal device 110-1 may first transmit the signal to initiate the channel occupancy and indicate to the other terminal devices in the group.
  • the terminal devices in the group may stop other Type 1 channel access procedures.
  • the same rule for starting point and length of signal may be applied, and each terminal device may start to transmit respective PSFCHs at the same starting point based on the transmitting/reception of signal.
  • the filler signal may be transmitted within a guard period symbol to adapt a sensing duration of channel access procedure.
  • the starting point of signal transmission may locate at anywhere within the GP symbol (or within the first half of GP symbol) to adapt to the uncertain sensing duration of Type 1 channel access procedure.
  • a length of the filler signal may be determined based on an ending of channel access procedure.
  • the length may not be short than a half symbol.
  • the length of filler signal may be at least half symbol (within AGC symbol and/or GP symbol) depending on the ending of channel access procedure.
  • the filler signal may be configured or preconfigured. Alternatively, the signal may be indicated in the SCI (s) related to groupcast/multiple unicast in a period. In some embodiments, the filler signal may be a specially designed signal, such as based on a sequence like PSS/SSS with low order modulation and coding scheme and full/partial continuous frequency range within LBT bandwidth which can be promptly captured by UE with low complexity.
  • a more reliable PSFCH transmission under the effect of channel access procedure has been achieved. Moreover, it can facilitate the channel access for PSFCH transmissions from different UEs in the same slot. Further, it can avoid a potential collision between PSFCH transmissions from different UEs/group in the same slot.
  • Fig. 6 shows a flowchart of an example method 600 in accordance with an embodiment of the present disclosure where the terminal device monitors the filler signal.
  • the method 600 can be implemented at any suitable terminal devices. Only for the purpose of illustrations, the method 600 can be implemented at a terminal device 110-2 as shown in Figs. 1A and 1B.
  • the terminal device 110-2 receives a configuration indicating a plurality of resources on a shared spectrum for sidelink transmission and an indication which informs the terminal device 110-2 to monitor a signal indicating a channel occupancy sharing among the group of terminal devices. Alternatively, such indication may inform the terminal device 110-2 not to perform the channel access procedure.
  • the terminal device 110-1 may receive the configuration from the network device 120. In this case, in some embodiments, the configuration may be transmitted via RRC signaling. Alternatively, if the sidelink communication is in mode 2 resources allocation, the terminal device 110-1 may receive the configuration from a TX terminal device (for example, the terminal device 110-3) . In this case, in some embodiments, the configuration may be indicated in sidelink control information (SCI) from the terminal device 110-3.
  • SCI sidelink control information
  • resources may be allocated for PSFCH transmission. For example, with the same symbols in a slot, one PSFCH resource within a nominal channel bandwidth may be expanded to N PSFCH resources locating at N frequency bands respectively. Each channel may satisfy the occupied channel bandwidth (OCB) requirement with LBT bandwidth at least.
  • the resources may be interlaced resource block (IRB) based. Alternatively, the resources may not be IRB based.
  • PSFCHs may be classified with different priorities. For example, the original PSFCH may have the highest priority. The additional PSFCHs close to the original PSFCH in frequency domain may have low priority.
  • additional PSFCHs may have different PSSCH-to-PSFCH resources mapping relation, namely frequency hopping or different pattern may be applied.
  • Different PSFCHs may be adjacent to each other in frequency domain separately distributed (within a resource pool) .
  • multiple resources locating at different frequency bands for PSFCH transmissions may be shared corresponding to multiple PSSCH/PSCCH transmissions.
  • the feedback information for each PSSCH/PSCCH transmission may be transmitted over multiple shared resources.
  • Each channel for PSFCH transmission may satisfy the OCB requirement with LBT bandwidth at least.
  • the resources may be interlaced resource block (IRB) based.
  • the resources may not be IRB based.
  • PSFCHs may be classified with different priorities. For example, the original PSFCH may have the highest priority. The additional PSFCHs close to the original PSFCH in frequency domain may have low priority.
  • multiple PSFCHs transmitted over separate resources may have different PSSCH-to-PSFCH resources mapping relation, namely frequency hopping or different pattern may be applied.
  • Different PSFCHs may be adjacent to each other in frequency domain or separately distributed (within a resource pool) .
  • the terminal device 110-2 monitors the filler signal indicating on one or more sidelink channels.
  • the signal may be received within a guard period symbol to adapt a sensing duration of channel access procedure.
  • the starting point of filler signal transmission may locate at anywhere within the GP symbol (or within the first half of GP symbol) to adapt to the uncertain sensing duration of Type 1 channel access procedure.
  • a length of the filler signal may be determined based on an ending of channel access procedure.
  • the length may not be short than a half symbol.
  • the length of signal may be at least half symbol (within AGC symbol and/or GP symbol) depending on the ending of channel access procedure.
  • the filler signal may be configured or preconfigured.
  • the signal may be indicated in the SCI (s) related to groupcast/multiple unicast in a period.
  • the signal may be a specially designed signal, such as based on a sequence like PSS/SSS with low order modulation and coding scheme and full/partial continuous frequency range within LBT bandwidth which can be promptly captured by UE with low complexity.
  • the terminal device 110-2 performs a sidelink transmission on the at least one sidelink channel.
  • the terminal device 110-2 may start to transmit respective PSFCHs at the same starting point based on the reception of signal.
  • Fig. 7 shows a signaling chart illustrating process 700 among the terminal device and the network device according to some example embodiments of the present disclosure. Only for the purpose of discussion, the process 700 will be described with reference to Fig. 1A or 1B. The process 700 may be applied to a scenario where a single terminal device performs the sidelink transmission. The process 700 may be described with reference to Figs. 8A-8E.
  • the network device 120 may transmit 7005 a configuration indicating a plurality of resources on a shared spectrum for sidelink transmission to the terminal device 110-1 and the terminal device 110-3.
  • the configuration may be transmitted via RRC signaling.
  • the terminal device 110-3 may transmit 7010 the configuration indicating a plurality of resources on a shared spectrum for sidelink transmission to the terminal device 110-1.
  • the configuration may be indicated in sidelink control information (SCI) from the terminal device 110-3.
  • SCI sidelink control information
  • the terminal device 110-3 may transmit 7015 sidelink data to the terminal device 110-1. Alternatively or in addition, the terminal device 110-3 may transmit sidelink control information to the terminal device 110-1.
  • the terminal device 110-1 may perform 7020 a channel access procedure on one or more sidelink channels.
  • the terminal device 110-1 may perform 7025 the sidelink transmission based on a result of the channel access procedure.
  • a PSFCH may be selected by the terminal device 110-1 uniformly randomly out of N PSFCHs corresponding to which a Type 1 channel access procedure is performed.
  • the other PSFCHs can be accessed by parallel performing Type 2 channel access procedures immediately before the terminal device 110-1 transmission on the PSFCH based on a successful Type 1 channel access procedure.
  • the starting points of potential transmissions on all PSFCHs may be aligned.
  • ACK/NACK feedbacks on all PSFCHs or none PSFCH may be transmitted depending on the results of multiple channel access procedures, namely only if all channel access procedures for all PSFCHs are successful, all PSFCHs may be transmitted, otherwise no PSFCH can be transmitted. For example, as shown in Fig.
  • the terminal device 110-1 may perform a Type 1 channel access procedure 820 on the resources 541 in symbol 810.
  • the terminal device 110-1 may perform a Type 2 channel access procedure 821 on the resources 542 in symbol 810. If both the Type 1 channel access procedure 820 and the Type 2 channel access procedure 821 are successful, the terminal device 110-1 may perform the sidelink transmission on the PSFCHs 830 and 831 in symbol 811. Alternatively, if at least one of the Type 1 channel access procedure 820 and the Type 2 channel access procedure 821 is not successful, the terminal device 110-1 may not perform the sidelink transmission.
  • the terminal device 110-1 may access multiple PSFCHs.
  • the result of channel access procedure on one PSFCH may not have effect on the other PSFCHs.
  • the terminal device 110-1 has the capability to sense and transmit on different PSFCH resources at the same time, the starting points of potential transmissions on all PSFCHs may not be naturally aligned.
  • the terminal device 110-1 may select/determine a suitable CPE based on configured multiple candidate CPEs with different length or based on configured maximum CPE length to adapt to uncertain sensing duration on respective PSFCH, e.g.
  • a PSFCH with higher priority may be configured/indicated a longer maximum CPE length or more applicable candidate CPEs and have a higher access probability.
  • the terminal device 110-1 may perform the Type 1 channel access procedure 820 on the resources 541 and the Type 1 channel access procedure 822 on the resources 542 in symbol 810. If the Type 1 channel access procedure 820 is successful, the terminal device 110-1 may transmit the CPE 840 on the resources 541 and then perform the sidelink transmission on the PSFCH 830 in symbols 811 and 812. If the Type 1 channel access procedure 822 is successful, the terminal device 110-1 may transmit the CPE 841 on the resources 542 and then perform the sidelink transmission on the PSFCH 832 in symbols 811 and 812.
  • the starting points of potential transmissions on all PSFCHs may be aligned based on the same CPE length or no CPE for all PSFCHs. Due to the independent counters and contention windows, additional sensing slot and/or deferral sensing duration may be involved for certain PSFCH (s) . If a long CPE length is applied to all PSFCHs, it can avoid the collision between PSFCHs from different terminal devices. For example, in some embodiments, as shown in Fig. 8C, the terminal device 110-1 may perform the Type 1 channel access procedure 820 on the resources 541 and the Type 1 channel access procedure 822 on the resources 542 in symbol 810.
  • the terminal device 110-1 may perform an additional sensing 850 on the resources 541. In this case, if the additional sensing 850 is successful, the terminal device 110-1 may perform the sidelink transmission on the PSFCH 830 in symbols 811. If the Type 1 channel access procedure 822 is successful, the terminal device 110-1 may perform an additional sensing 851 on the resources 542. In this case, if the additional sensing 851 is successful, the terminal device 110-1 may perform the sidelink transmission on the PSFCH 832 in symbols 811.
  • the terminal device 110-1 may perform the Type 1 channel access procedure 820 on the resources 541 and the Type 1 channel access procedure 822 on the resources 542 in symbol 810. If the Type 1 channel access procedure 820 is successful, the terminal device 110-1 may perform an additional sensing 850 on the resources 541. In this case, if the additional sensing 850 is successful, the terminal device 110-1 may transmit the CPE 840 on the resources 541 and then perform the sidelink transmission on the PSFCH 830 in symbol 811. If the Type 1 channel access procedure 822 is successful, the terminal device 110-1 may perform an additional sensing 851 on the resources 542.
  • the terminal device 110-1 may transmit the CPE 841 on the resources 541 and then perform the sidelink transmission on the PSFCH 832 in symbol 811. In this way, the duration of the additional sensing can be reduced.
  • the terminal device 110-1 may transmit all feedback information through any PSFCH based on successful channel access procedures corresponding to this PSFCH.
  • the terminal device 110-1 may stop all channel access procedures and may start to transmit on the PSFCH (with the highest priority) .
  • the terminal device 110-1 may perform the Type 1 channel access procedure 820 on the resources 541 and the Type 1 channel access procedure 822 on the resources 542 in symbol 810.
  • the terminal device 110-1 may stop the Type 1 channel access procedure 822.
  • the terminal device 110-1 may transmit the CPE 840 on the resources 541 and then perform the sidelink transmission on the PSFCHs 830 in symbols 811 and 812.
  • Fig. 9 shows a signaling chart illustrating process 900 among the terminal device and the network device according to some example embodiments of the present disclosure. Only for the purpose of discussion, the process 900 will be described with reference to Fig. 1A or 1B.
  • the process 900 may be applied to a scenario where multiple terminal devices perform the sidelink transmission on one or more sidelink channels.
  • the process 900 may be described with reference to Figs. 10A-10B.
  • the terminal device 110-1 and the terminal device 110-2 may be configured with a plurality of resources on a shared spectrum for sidelink transmission.
  • the terminal device 110-3 may transmit 9005 sidelink data to the terminal device 110-1 and the terminal device 110-1. Alternatively or in addition, the terminal device 110-3 may transmit sidelink control information to the terminal device 110-1 and the terminal device 110-1.
  • the terminal device 110-1 may perform 9010 a channel access procedure on one or more sidelink channels.
  • the terminal device 110-2 may perform 9015 a channel access procedure on one or more sidelink channels. It should be noted that the order of performing 9010 the channel access procedure and performing 9015 the channel access procedure may not be limited. For example, the terminal device 110-1 and the terminal device 110-2 may perform the channel access procedure simultaneously. Alternatively, the terminal device 110-1 may perform the channel access procedure before or after the terminal device 110-2 performing the channel access procedure.
  • the terminal device 110-1 may transmit 9020 the feedback information to the terminal device 110-3. If the channel access procedure on at least one sidelink channel is successful, the terminal device 110-2 may transmit 9025 the feedback information to the terminal device 110-3. It should be noted that the order of transmissions of feedback information 9020 and 9025 may not be limited. For example, the terminal device 110-1 and the terminal device 110-2 may transmit the feedback information simultaneously. Alternatively, the terminal device 110-1 may transmit the feedback information before or after the terminal device 110-2 may transmit the feedback information.
  • the terminal device 110-1 may perform separate Type 1 channel access procedure with independent counter and contention window.
  • the starting points of potential transmissions from all terminal devices may be aligned based on the same CPE or no CPE for all PSFCHs. For example, as shown in Fig. 10A, the terminal device 110-1 may perform a Type 1 channel access procedure 920 on the resources 541 in symbol 910.
  • the terminal device 110-2 may perform a Type 1 channel access procedure 922 on the resources 541 in symbol 910.
  • the terminal device 110-1 may perform an additional sensing 950 on the resources 541. In this case, if the additional sensing 950 is successful, the terminal device 110-1 may transmit the CPE 940 on the resources 541 and then perform the sidelink transmission on the PSFCH 930 in symbols 911 and 912. If the Type 1 channel access procedure 922 is successful, the terminal device 110-2 may transmit the CPE 941 on the resources 541 and then perform the sidelink transmission on the PSFCH 931 in symbols 911 and 912.
  • each terminal device may perform multiple independent Type 1 channel access procedures corresponding to multiple PSFCH for this terminal device.
  • Multiple FDMed PSFCHs transmissions from different terminal devices may be aligned with a common starting point based on prefixed CPE or no CPE.
  • the terminal device 110-1 may perform a Type 1 channel access procedure 920 on the resources 541 and a Type 1 channel access procedure 923 on the resources 542 in symbol 910. If the Type 1 channel access procedure 920 is successful, the terminal device 110-1 may perform an additional sensing 950 on the resources 541.
  • the terminal device 110-1 may transmit the CPE 940 on the resources 541 and then perform the sidelink transmission on the PSFCH 930 in symbols 911 and 912. If the Type 1 channel access procedure 923 is successful, the terminal device 110-1 may perform an additional sensing 951 on the resources 542. In this case, if the additional sensing 951 is successful, the terminal device 110-1 may transmit the CPE 943 on the resources 542 and then perform the sidelink transmission on the PSFCH 933 in symbols 911 and 912. The terminal device 110-2 may perform a Type 1 channel access procedure 922 on the resources 541 and a Type 1 channel access procedure 924 on the resources 542 in symbol 910.
  • the terminal device 110-2 may transmit the CPE 942 on the resources 541 and then perform the sidelink transmission on the PSFCH 932 in symbols 911 and 912. If the Type 1 channel access procedure 924 is successful, the terminal device 110-2 may perform an additional sensing 952 on the resources 542. In this case, if the additional sensing 952 is successful, the terminal device 110-2 may transmit the CPE 944 on the resources 542 and then perform the sidelink transmission on the PSFCH 934 in symbols 911 and 912.
  • Fig. 11 shows a signaling chart illustrating process 1100 among the terminal device and the network device according to some example embodiments of the present disclosure. Only for the purpose of discussion, the process 1100 will be described with reference to Fig. 1A or 1B. The process 1100 may be applied to a scenario where the channel occupancy can be initiated by a terminal device and shared with the other terminal devices. The process 1100 may be described with reference to Figs. 12A-12E.
  • the terminal device 110-3 may transmit 1105, to the terminal device 110-2, an indication which informs the terminal device 110-2 to monitor a signal indicating a channel occupancy sharing among the group of terminal devices. Alternatively, such indication may inform the terminal device 110-2 not to perform the channel access procedure.
  • the terminal device 110-3 may transmit 1105, to the terminal device 110-1, an indication which informs that terminal device 110-1 to transmit a filler signal that indicates a channel occupancy sharing among the group of terminal devices for sidelink transmissions. Alternatively, such indication may inform the terminal device 110-1 to perform the channel access procedure.
  • the above mentioned indications may be transmitted in SCI.
  • the terminal device 110-1 may perform 1115 a channel access procedure on one or more sidelink channels.
  • the terminal device 110-2 may monitor 1120 the filler signal on the one or more sidelink channels. After the channel access procedure is successful on at least one sidelink channel, the terminal device 110-1 may transmit 1125 the signal to the terminal device 110-2.
  • the terminal device 110-1 may transmit 1130 the feedback information to the terminal device 110-3 after the transmission of the signal.
  • the terminal device 110-2 may transmit 1135 the feedback information to the terminal device 110-3 after the reception of the signal. It should be noted that the order of transmissions of feedback information 1130 and 1135 may not be limited.
  • the terminal device 110-1 and the terminal device 110-2 may transmit the feedback information simultaneously.
  • the terminal device 110-1 may transmit the feedback information before or after the terminal device 110-2 may transmit the feedback information.
  • M terminal devices may perform independent Type 1 channel access procedures before the GP between PSSCH and PSFCH.
  • the M terminal devices may be uniformly randomly selected in a group of terminal devices by transmitting terminal device and indicated in the SCI.
  • the terminal device 110-1 may immediately transmit a channel occupancy sharing indication signal (or simply a filler signal) during the GP symbol (and the first half of AGC symbol) before PSFCH to initiate a channel occupancy and indicate channel occupancy information to the other related terminal devices. For example, as shown in Figs. 12A and 12B, the terminal device 110-1 may perform the Type 1 channel access procedure 1220 on the resources 541 in symbol 1210. If the Type 1 channel access procedure 1220 is successful, the terminal device 110-1 may transmit the signal 1250 to other terminal devices. After the transmission of the signal 1250, the terminal device 110-1 may perform the sidelink transmission on the PSFCH 1230 in symbols 1211 and 1212.
  • a channel occupancy sharing indication signal or simply a filler signal
  • the terminal device 110-2 may perform the sidelink transmission on the PSFCH 1232 in symbols 1211 and 1212.
  • the signal may be transmitted within one symbol, for example, the symbol 1210.
  • the signal may be transmitted across two symbols, for example, the symbols 1210 and 1211.
  • each PSFCH may carry different version feedback for all terminal devices.
  • a PSFCH may be selected by the terminal device 110-1 uniformly randomly out of N PSFCHs on which the Type 1 channel access procedure is performed.
  • the terminal device 110-1 can assess the other PSFCHs by parallel performing Type 2 channel access procedures immediately before the transmission on the PSFCH based on a successful Type 1 channel access procedure.
  • the starting points of potential transmissions on all PSFCHs from terminal devices may be aligned. In this case, the terminal device 110-1 may first transmit the signal to initiate the channel occupancy and indicate to the other terminal devices in the group.
  • each terminal device may start to transmit respective FDMed PSFCHs at the same starting point based on the transmitting/reception of signal.
  • the terminal device 110-1 may perform the Type 1 channel access procedure 1220 on the resources 541 in symbol 1210.
  • the terminal device 110-1 may perform the Type 2 channel access procedure 1223 on the resources 542 in symbol 1210. If the Type 1 channel access procedure 1220 and the Type 2 channel access procedure 1223 are successful, the terminal device 110-1 may transmit the signal 1250 to other terminal devices on the resources 541 and transmit the signal 1251 to other terminal devices on the resources 542.
  • the terminal device 110-1 may perform the sidelink transmission on the PSFCH 1230 and the transmission on PSFCH 1233 in symbols 1211 and 1212.
  • the terminal device 110-2 may perform the sidelink transmission on the PSFCH 1232 and the transmission on PSFCH 1234 in symbols 1211 and 1212.
  • the lengths of the signals 1250 and 1251 may be longer than a half symbol.
  • the terminal device 110-1 may perform N independent/dependent (with different counter and contention window or with same counter and contention window) Type 1 channel access procedures at the same time.
  • N independent/dependent (with different counter and contention window or with same counter and contention window) Type 1 channel access procedures at the same time.
  • the terminal device 110-1 and the other terminal devices in the group stop other Type 1 channel access procedures.
  • the terminal device 110-1 may first transmit the signal to initiate the channel occupancy and indicate to the other terminal devices in the group.
  • the same rule for starting point and length of filler signal may be applied, and each terminal device may start to transmit respective PSFCHs at the same starting point based on the transmitting/reception of signal. For example, as shown in Fig.
  • the terminal device 110-1 may perform the Type 1 channel access procedure 1220 on the resources 541 in symbol 1210.
  • the terminal device 110-1 may perform the Type 1 channel access procedure 1224 on the resources 542 in symbol 1210. If the Type 1 channel access procedure 1220 is successful, the terminal device 110-1 may stop the Type 1 channel access procedure 1224. Moreover, if the Type 1 channel access procedure 1220 is successful, the terminal device 110-1 may transmit the signal 1250 to other terminal devices on the resources 541. After the transmission of the signal 1250, the terminal device 110-1 may perform the sidelink transmission on the PSFCH 1230 in symbols 1211 and 1212. After the reception of the signal 1250, the terminal device 110-2 may perform the sidelink transmission on the PSFCH 1232 in symbols 1211 and 1212. The lengths of the signals 1250 and 1251 may be longer than a half symbol.
  • the terminal device 110-1 may perform one or multiple independent/dependent Type 1 channel access procedures.
  • another terminal device may perform one or multiple PSFCHs independent/dependent Type 1 channel access procedures corresponding to other FDMed PSFCHs.
  • the terminal devices by which Type 1 channel access procedures corresponding to all PSFCHs are performed may be uniformly randomly selected by transmitting terminal device and indicated in the SCI. Each channel access procedure may use different/the same counter and contention window as that of other Type 1 channel access procedures.
  • the terminal device 110-1 may first transmit the filler signal to initiate the channel occupancy and indicate to the other terminal devices in the group.
  • the terminal devices in the group may stop other Type 1 channel access procedures.
  • the same rule for starting point and length of signal may be applied, and each terminal device may start to transmit respective PSFCHs at the same starting point based on the transmitting/reception of the filler signal.
  • the terminal device 110-1 may perform the Type 1 channel access procedure 1220 on the resources 541 in symbol 1210.
  • the terminal device 110-1 may perform the Type 1 channel access procedure 1224 on the resources 542 in symbol 1210. If the Type 1 channel access procedure 1220 is successful, the terminal device 110-1 may stop the Type 1 channel access procedure 1224.
  • the terminal device 110-1 may transmit the signal 1250 to other terminal devices on the resources 541. After the transmission of the signal 1250, the terminal device 110-1 may perform the sidelink transmission on the PSFCH 1230 in symbols 1211 and 1212. The terminal device 110-2 may perform the sidelink transmission on the PSFCH 1232 in symbols 1211 and 1212.
  • a terminal device comprises circuitry configured to perform: receiving, at a terminal device, a configuration indicating a plurality of resources on a shared spectrum for sidelink transmission; performing a channel access procedure on one or more sidelink channels, wherein each of the one or more sidelink channels is associated with a subset of the plurality of resources on the shared spectrum; and in accordance with a determination that the channel access procedure on at least one sidelink channel in the one or more sidelink channels is successful, performing a sidelink transmission on the at least one sidelink channel.
  • the one or more sidelink channels comprise a first sidelink channel and a second sidelink channel.
  • the terminal device comprises circuitry configured to perform: determining a first cyclic prefix extension (CPE) for the first sidelink channel and a second CPE for the second sidelink channel, wherein the first CPE and the second CPE are used to adapt to effect of uncertain sensing durations of the channel access procedure for the first and second sidelink channels.
  • CPE cyclic prefix extension
  • the terminal device comprises circuitry configured to perform the channel access procedure on the one or more sidelink channels by: performing a first channel access procedure on the first sidelink channel and a second channel access procedure on the second sidelink channel.
  • the terminal device comprises circuitry configured to perform the sidelink transmission on the at least one sidelink channel by: in accordance with a determination that the first and second channel access procedures are successful, transmitting the first CPE and the sidelink transmission on the first sidelink channel; and transmitting the second CPE and the sidelink transmission on the second sidelink channel.
  • the first CPE is longer than the second CPE.
  • the one or more sidelink channels comprise a first sidelink channel and a second sidelink channel.
  • the terminal device comprises circuitry configured to perform: in accordance with a determination that a first channel access procedure on the first sidelink channel and a second channel access procedure on the second sidelink channel are successful, performing at least one of: a first additional sensing on the first sidelink channel before the sidelink transmission on the first sidelink channel, or a second additional sensing on the second sidelink channel before the sidelink transmission on the second sidelink channel.
  • the one or more sidelink channels comprise a first sidelink channel and a second sidelink channel and the sidelink transmission comprises feedback information.
  • the terminal device comprises circuitry configured to perform the sidelink transmission on the at least one sidelink channel by: in accordance with a determination that a first channel access procedure on the first sidelink channel is successful, transmitting the feedback information on the first sidelink channel regardless of a second channel access procedure on the second sidelink channel.
  • the terminal device is in a group of terminal devices, the sidelink transmission comprises feedback information.
  • the terminal device comprises circuitry configured to perform receiving a CPE indication for the feedback information transmission; and in accordance with a determination that the channel access procedure is successful on the at least one sidelink channel, performing the sidelink transmission on the at least one sidelink channel based on the CPE indication.
  • the terminal device comprises circuitry configured to perform at least one of: transmitting a third CPE on the at least one sidelink channel before the sidelink transmission; or performing a third additional sensing on the at least one sidelink channel before the sidelink transmission, and starting points of the transmissions of feedback information transmitted by respective terminal devices in the group are aligned based on at least one of: the third CPE and/or a duration of the third additional sensing.
  • the terminal device is in a group of terminal devices, the sidelink transmission comprises feedback information.
  • the terminal device comprises circuitry configured to perform in accordance with a determination that the channel access procedure on the at least one sidelink channel is successful, transmitting, to other terminal devices in the group of terminal devices, a signal on the at least one sidelink channel, wherein the signal indicates a channel occupancy sharing among the group of terminal devices for sidelink transmissions.
  • the terminal device is in a group of terminal devices, the sidelink transmission comprises feedback information, the one or more sidelink channels comprises a first sidelink channel and a second sidelink channel.
  • the terminal device comprises circuitry configured to perform the channel access procedure on the one or more sidelink channels by: performing a first channel access procedure on the first sidelink channel and a second channel access procedure on the second sidelink channel.
  • the terminal device comprises circuitry configured to perform in accordance with a determination that the first and second channel access procedures are successful, transmitting, to other terminal devices in the group of terminal devices, a signal on the first and second sidelink channels, wherein the signal indicates a channel occupancy sharing among the group of terminal devices for sidelink transmissions.
  • the terminal device is in a group of terminal devices, the sidelink transmission comprises feedback information, the one or more sidelink channels comprises a first sidelink channel and a second sidelink channel.
  • the terminal device comprises circuitry configured to perform the channel access procedure on the one or more sidelink channels by: performing a first channel access procedure on the first sidelink channel and a second channel access procedure on the second sidelink channel.
  • the terminal device comprises circuitry configured to perform in accordance with a determination that a first channel access procedure on the first sidelink channel is successful, transmitting a signal on the first sidelink channel regardless of a second channel access procedure on the second sidelink channel, wherein the signal indicates a channel occupancy sharing among the group of terminal devices for sidelink transmissions.
  • the signal is configured at the terminal device.
  • the terminal device comprises circuitry configured to perform receiving sidelink control information (SCI) indicating the signal.
  • SCI sidelink control information
  • the terminal device comprises circuitry configured to perform transmitting the signal by: transmitting the signal within a guard period symbol to adapt a sensing duration of channel access procedure.
  • a length of the signal is determined based on an ending of channel access procedure, and the length is not short than a half symbol.
  • the terminal device comprises circuitry configured to perform receiving, at the terminal device, an indication which informs the terminal device to perform the channel access procedure and transmit the signal according to a result of the channel access procedure.
  • a terminal device comprises circuitry configured to perform receiving, at a second terminal device in a group of terminal devices, a configuration comprising a plurality of resources on a shared spectrum for sidelink transmission and an indication regarding monitoring a signal indicating a channel occupancy sharing among the group of terminal devices; monitoring, on one or more sidelink channels, the signal, wherein each of the one or more sidelink channels is associated with a subset of the plurality of resources on the shared spectrum; and in accordance with a determination that the signal is received on at least one sidelink channel in the one or more sidelink channels, performing a sidelink transmission on the at least one sidelink channel.
  • Fig. 13 is a simplified block diagram of a device 1300 that is suitable for implementing embodiments of the present disclosure.
  • the device 1300 can be considered as a further example implementation of the terminal devices 110 as shown in Figs. 1A and 1B. Accordingly, the device 1300 can be implemented at or as at least a part of the terminal device 110-1 or the terminal device 110-2.
  • the device 1300 includes a processor 1310, a memory 1320 coupled to the processor 1310, a suitable transmitter (TX) and receiver (RX) 1340 coupled to the processor 1310, and a communication interface coupled to the TX/RX 1340.
  • the memory 1320 stores at least a part of a program 1330.
  • the TX/RX 1340 is for bidirectional communications.
  • the TX/RX 1340 has at least one antenna to facilitate communication, though in practice an Access Node mentioned in this application may have several ones.
  • the communication interface may represent any interface that is necessary for communication with other network elements, such as X2 interface for bidirectional communications between eNBs, S1 interface for communication between a Mobility Management Entity (MME) /Serving Gateway (S-GW) and the eNB, Un interface for communication between the eNB and a relay node (RN) , or Uu interface for communication between the eNB and a terminal device.
  • MME Mobility Management Entity
  • S-GW Serving Gateway
  • Un interface for communication between the eNB and a relay node (RN)
  • Uu interface for communication between the eNB and a terminal device.
  • the program 1330 is assumed to include program instructions that, when executed by the associated processor 1310, enable the device 1300 to operate in accordance with the embodiments of the present disclosure, as discussed herein with reference to Fig. 4 to 11.
  • the embodiments herein may be implemented by computer software executable by the processor 1310 of the device 1300, or by hardware, or by a combination of software and hardware.
  • the processor 1310 may be configured to implement various embodiments of the present disclosure.
  • a combination of the processor 1310 and memory 1320 may form processing means 1350 adapted to implement various embodiments of the present disclosure.
  • the memory 1320 may be of any type suitable to the local technical network and may be implemented using any suitable data storage technology, such as a non-transitory computer readable storage medium, semiconductor-based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory, as non-limiting examples. While only one memory 1320 is shown in the device 1300, there may be several physically distinct memory modules in the device 1300.
  • the processor 1310 may be of any type suitable to the local technical network, and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multicore processor architecture, as non-limiting examples.
  • the device 1300 may have multiple processors, such as an application specific integrated circuit chip that is slaved in time to a clock which synchronizes the main processor.
  • various embodiments of the present disclosure may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device. While various aspects of embodiments of the present disclosure are illustrated and described as block diagrams, flowcharts, or using some other pictorial representation, it will be appreciated that the blocks, apparatus, systems, techniques or methods described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
  • the present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer readable storage medium.
  • the computer program product includes computer-executable instructions, such as those included in program modules, being executed in a device on a target real or virtual processor, to carry out the process or method as described above with reference to Figs. 4 to 11.
  • program modules include routines, programs, libraries, objects, classes, components, data structures, or the like that perform particular tasks or implement particular abstract data types.
  • the functionality of the program modules may be combined or split between program modules as desired in various embodiments.
  • Machine-executable instructions for program modules may be executed within a local or distributed device. In a distributed device, program modules may be located in both local and remote storage media.
  • Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program codes, when executed by the processor or controller, cause the functions/operations specified in the flowcharts and/or block diagrams to be implemented.
  • the program code may execute entirely on a machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
  • the above program code may be embodied on a machine readable medium, which may be any tangible medium that may contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
  • the machine readable medium may be a machine readable signal medium or a machine readable storage medium.
  • a machine readable medium may include but not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing.
  • machine readable storage medium More specific examples of the machine readable storage medium would include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM) , a read-only memory (ROM) , an erasable programmable read-only memory (EPROM or Flash memory) , an optical fiber, a portable compact disc read-only memory (CD-ROM) , an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
  • RAM random access memory
  • ROM read-only memory
  • EPROM or Flash memory erasable programmable read-only memory
  • CD-ROM portable compact disc read-only memory
  • magnetic storage device or any suitable combination of the foregoing.
  • terminal device refers to any device having wireless or wired communication capabilities.
  • the terminal device include, but not limited to, user equipment (UE) , personal computers, desktops, mobile phones, cellular phones, smart phones, personal digital assistants (PDAs) , portable computers, tablets, wearable devices, internet of things (IoT) devices, Ultra-reliable and Low Latency Communications (URLLC) devices, Internet of Everything (IoE) devices, machine type communication (MTC) devices, device on vehicle for V2X communication where X means pedestrian, vehicle, or infrastructure/network, devices for Integrated Access and Backhaul (IAB) , Small Data Transmission (SDT) , mobility, Multicast and Broadcast Services (MBS) , positioning, dynamic/flexible duplex in commercial networks, reduced capability (RedCap) , Space borne vehicles or Air borne vehicles in Non-terrestrial networks (NTN) including Satellites and High Altitude Platforms (HAPs) encompassing Unmanned Aircraft Systems (UAS) , eX
  • UE user equipment
  • the ‘terminal device’ can further has ‘multicast/broadcast’ feature, to support public safety and mission critical, V2X applications, transparent IPv4/IPv6 multicast delivery, IPTV, smart TV, radio services, software delivery over wireless, group communications and IoT applications. It may also incorporate one or multiple Subscriber Identity Module (SIM) as known as Multi-SIM.
  • SIM Subscriber Identity Module
  • the term “terminal device” can be used interchangeably with a UE, a mobile station, a subscriber station, a mobile terminal, a user terminal or a wireless device.
  • network device refers to a device which is capable of providing or hosting a cell or coverage where terminal devices can communicate.
  • a network device include, but not limited to, a Node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , a next generation NodeB (gNB) , a transmission reception point (TRP) , a remote radio unit (RRU) , a radio head (RH) , a remote radio head (RRH) , an IAB node, a low power node such as a femto node, a pico node, a reconfigurable intelligent surface (RIS) , Network-controlled Repeaters, and the like.
  • NodeB Node B
  • eNodeB or eNB evolved NodeB
  • gNB next generation NodeB
  • TRP transmission reception point
  • RRU remote radio unit
  • RH radio head
  • RRH remote radio head
  • IAB node a low power node such
  • the terminal device or the network device may have Artificial intelligence (AI) or Machine learning capability. It generally includes a model which has been trained from numerous collected data for a specific function, and can be used to predict some information.
  • AI Artificial intelligence
  • Machine learning capability it generally includes a model which has been trained from numerous collected data for a specific function, and can be used to predict some information.
  • the terminal or the network device may work on several frequency ranges, e.g. FR1 (410 MHz –7125 MHz) , FR2 (24.25GHz to 71GHz) , frequency band larger than 100GHz as well as Tera Hertz (THz) . It can further work on licensed/unlicensed/shared spectrum.
  • the terminal device may have more than one connections with the network devices under Multi-Radio Dual Connectivity (MR-DC) application scenario.
  • MR-DC Multi-Radio Dual Connectivity
  • the terminal device or the network device can work on full duplex, flexible duplex and cross division duplex modes.
  • the network device may have the function of network energy saving, Self-Organising Networks (SON) /Minimization of Drive Tests (MDT) .
  • the terminal may have the function of power saving.
  • test equipment e.g. signal generator, signal analyzer, spectrum analyzer, network analyzer, test terminal device, test network device, channel emulator.
  • the embodiments of the present disclosure may be performed according to any generation communication protocols either currently known or to be developed in the future.
  • Examples of the communication protocols include, but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the fourth generation (4G) , 4.5G, the fifth generation (5G) communication protocols, 5.5G, 5G-Advanced networks, or the sixth generation (6G) networks.

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

Abstract

Des modes de réalisation de la présente divulgation concernent des procédés, des dispositifs, et un support lisible par ordinateur destinés à la communication. Selon des modes de réalisation de la présente divulgation, un dispositif de réseau ou un dispositif terminal de transmission transmet une configuration indiquant une pluralité de ressources dans le domaine fréquentiel en vue d'une transmission de liaison latérale à un dispositif terminal de réception. Le dispositif terminal de réception réalise une procédure d'accès au canal sur un ou plusieurs canaux de liaison latérale. Si la procédure d'accès au canal sur au moins un canal de liaison latérale est réussie, le dispositif terminal de réception réalise une transmission de liaison latérale sur le ou les canaux de liaison latérale. De cette manière, une transmission de canal PSFCH plus fiable sous l'effet de la procédure d'accès au canal est obtenue. De plus, cela peut faciliter l'accès au canal pour des transmissions de canal PSFCH depuis différents UE dans le même créneau. En outre, cela peut éviter une éventuelle collision entre des transmissions de canal PSFCH depuis différents UE/un groupe dans le même créneau.
PCT/CN2022/085950 2022-04-08 2022-04-08 Procédés, dispositifs et support lisible par ordinateur destinés à la communication WO2023193262A1 (fr)

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Citations (4)

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CN110475343A (zh) * 2018-05-10 2019-11-19 索尼公司 电子装置、无线通信方法和计算机可读介质
WO2021195960A1 (fr) * 2020-03-31 2021-10-07 Lenovo (Beijing) Limited Procédé et appareil pour transmission en liaison latérale basée sur des rafales
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CN110475343A (zh) * 2018-05-10 2019-11-19 索尼公司 电子装置、无线通信方法和计算机可读介质
WO2021195960A1 (fr) * 2020-03-31 2021-10-07 Lenovo (Beijing) Limited Procédé et appareil pour transmission en liaison latérale basée sur des rafales
US20210400732A1 (en) * 2020-06-18 2021-12-23 Qualcomm Incorporated Sub-channel-based occupancy time sharing for unlicensed sidelink
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