WO2022204891A1 - Communication de liaison latérale sans licence avec attribution de ressources de nœud centrale - Google Patents

Communication de liaison latérale sans licence avec attribution de ressources de nœud centrale Download PDF

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Publication number
WO2022204891A1
WO2022204891A1 PCT/CN2021/083658 CN2021083658W WO2022204891A1 WO 2022204891 A1 WO2022204891 A1 WO 2022204891A1 CN 2021083658 W CN2021083658 W CN 2021083658W WO 2022204891 A1 WO2022204891 A1 WO 2022204891A1
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WIPO (PCT)
Prior art keywords
information
resource allocation
sidelink
allocation grant
indication
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PCT/CN2021/083658
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English (en)
Inventor
Naizheng ZHENG
Jing He
Tao Tao
Yong Liu
Original Assignee
Nokia Shanghai Bell Co., Ltd.
Nokia Solutions And Networks Oy
Nokia Technologies Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Nokia Shanghai Bell Co., Ltd., Nokia Solutions And Networks Oy, Nokia Technologies Oy filed Critical Nokia Shanghai Bell Co., Ltd.
Priority to PCT/CN2021/083658 priority Critical patent/WO2022204891A1/fr
Priority to CN202180096496.5A priority patent/CN117099458A/zh
Publication of WO2022204891A1 publication Critical patent/WO2022204891A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1854—Scheduling and prioritising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L2001/0092—Error control systems characterised by the topology of the transmission link
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • 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]

Definitions

  • Embodiments of the present disclosure generally relate to the field of telecommunication and in particular to devices, methods, apparatuses and computer readable storage media of unlicensed sidelink communication with central node resource allocation.
  • unlicensed sidelink or unlicensed Device to Device (D2D)
  • V2X Vehicle to Everything
  • NR-SL-U New Radio (NR) sidelink on unlicensed band
  • NR-SL-U NR-Unlicensed band
  • NR-SL NR-Sidelink
  • the current study of NR-SL assumes that the UE-to-UE or device-to-device communication via licensed band only, i.e., NR UL licensed band.
  • example embodiments of the present disclosure provide a solution of unlicensed sidelink communication with central node resource allocation.
  • a first device comprising at least one processor; and at least one memory including computer program codes; the at least one memory and the computer program codes are configured to, with the at least one processor, cause the first device at least to receive, from a second device, an indication of a resource allocation grant for the first device to perform a sidelink transmission; and transmit first information in the sidelink transmission, the first information at least indicating a validity of the resource allocation grant.
  • a second device comprising at least one processor; and at least one memory including computer program codes; the at least one memory and the computer program codes are configured to, with the at least one processor, cause the second device at least to perform a listen before talk procedure, generate, based on a result of the listen before talk procedure, an indication of a resource allocation grant for a first device to perform a sidelink transmission; transmit the indication to the first device; and receive, from the first device first information in the sidelink transmission, the first information at least indicating a validity of the resource allocation grant.
  • a third device comprises at least one processor; and at least one memory including computer program codes; the at least one memory and the computer program codes are configured to, with the at least one processor, cause the third device at least to receive, from a first device first information in a sidelink transmission, the first information at least indicating a validity of a resource allocation grant for the first device to perform the sidelink transmission; and determine the validity of a resource allocation grant based on the first information.
  • a method comprises receiving, at a first device and from a second device, an indication of a resource allocation grant for the first device to perform a sidelink transmission; and transmitting first information in the sidelink transmission, the first information at least indicating a validity of the resource allocation grant.
  • a method comprises performing a listen before talk procedure, generating, at a second device based on a result of the listen before talk procedure, an indication of a resource allocation grant for a first device to perform a sidelink transmission; transmitting the indication to the first device; and receiving, from the first device first information in the sidelink transmission, the first information at least indicating a validity of the resource allocation grant.
  • a method comprises receiving, at a third device and from a first device first information in a sidelink transmission, the first information at least indicating a validity of a resource allocation grant for the first device to perform the sidelink transmission; and determining the validity of a resource allocation grant based on the first information.
  • an apparatus comprising means for receiving, at a first device and from a second device, an indication of a resource allocation grant for the first device to perform a sidelink transmission; and means for transmitting first information in the sidelink transmission, the first information at least indicating a validity of the resource allocation grant.
  • an apparatus comprising means for performing a listen before talk procedure, means for generating, at a second device based on a result of the listen before talk procedure, an indication of a resource allocation grant for a first device to perform a sidelink transmission; means for transmitting the indication to the first device; and means for receiving, from the first device first information in the sidelink transmission, the first information at least indicating a validity of the resource allocation grant.
  • an apparatus comprising means for receiving, at a third device and from a first device first information in a sidelink transmission, the first information at least indicating a validity of a resource allocation grant for the first device to perform the sidelink transmission; and means for determining the validity of a resource allocation grant based on the first information.
  • a computer readable medium having a computer program stored thereon which, when executed by at least one processor of a device, causes the device to carry out the method according to the fourth aspect.
  • a computer readable medium having a computer program stored thereon which, when executed by at least one processor of a device, causes the device to carry out the method according to the fifth aspect.
  • a computer readable medium having a computer program stored thereon which, when executed by at least one processor of a device, causes the device to carry out the method according to the sixth aspect.
  • FIG. 1 illustrates an example environment in which example embodiments of the present disclosure can be implemented
  • FIG. 2 shows a signaling chart illustrating a process of unlicensed sidelink communication with central node resource allocation according to some example embodiments of the present disclosure
  • FIG. 3 shows a flowchart of an example method of unlicensed sidelink communication with central node resource allocation according to some example embodiments of the present disclosure
  • FIG. 4 shows a flowchart of an example method of unlicensed sidelink communication with central node resource allocation according to some example embodiments of the present disclosure
  • FIG. 5 shows a flowchart of an example method of unlicensed sidelink communication with central node resource allocation according to some example embodiments of the present disclosure
  • FIG. 6 shows a simplified block diagram of a device that is suitable for implementing example embodiments of the present disclosure.
  • FIG. 7 shows a block diagram of an example computer readable medium in accordance with some embodiments of the present disclosure.
  • references in the present disclosure to “one embodiment, ” “an embodiment, ” “an example embodiment, ” and the like indicate that the embodiment described may include a particular feature, structure, or characteristic, but it is not necessary that every embodiment includes the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an example embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
  • circuitry may refer to one or more or all of the following:
  • circuitry also covers an implementation of merely a hardware circuit or processor (or multiple processors) or portion of a hardware circuit or processor and its (or their) accompanying software and/or firmware.
  • circuitry also covers, for example and if applicable to the particular claim element, a baseband integrated circuit or processor integrated circuit for a mobile device or a similar integrated circuit in server, a cellular network device, or other computing or network device.
  • the term “communication network” refers to a network following any suitable communication standards, such as fifth generation (5G) systems, Long Term Evolution (LTE) , LTE-Advanced (LTE-A) , Wideband Code Division Multiple Access (WCDMA) , High-Speed Packet Access (HSPA) , Narrow Band Internet of Things (NB-IoT) and so on.
  • 5G fifth generation
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • WCDMA Wideband Code Division Multiple Access
  • HSPA High-Speed Packet Access
  • NB-IoT Narrow Band Internet of Things
  • the communications between a terminal device and a network device in the communication network may be performed according to any suitable generation communication protocols, including, 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 future fifth generation (5G) new radio (NR) communication protocols, and/or any other protocols either currently known or to be developed in the future.
  • suitable generation communication protocols including, 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 future fifth generation (5G) new radio (NR) communication protocols, and/or any other protocols either currently known or to be developed in the future.
  • Embodiments of the present disclosure may be applied in various communication systems. Given the rapid development in communications, there will of course also be future type communication technologies and systems with which the present disclosure may be embodied. It should not be seen as limiting the
  • the term “network device” refers to a node in a communication network via which a terminal device accesses the network and receives services therefrom.
  • the network device may refer to a base station (BS) or an access point (AP) , for example, a node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , a NR Next Generation NodeB (gNB) , a Remote Radio Unit (RRU) , a radio header (RH) , a remote radio head (RRH) , a relay, a low power node such as a femto, a pico, and so forth, depending on the applied terminology and technology.
  • BS base station
  • AP access point
  • NodeB or NB node B
  • eNodeB or eNB evolved NodeB
  • gNB Next Generation NodeB
  • RRU Remote Radio Unit
  • RH radio header
  • RRH remote radio head
  • relay a
  • a RAN split architecture comprises a gNB-CU (Centralized unit, hosting RRC, SDAP and PDCP) controlling a plurality of gNB-DUs (Distributed unit, hosting RLC, MAC and PHY) .
  • a relay node may correspond to DU part of the IAB node.
  • the network device may also be referred to as a central node device performing LBT.
  • terminal device refers to any end device that may be capable of wireless communication.
  • a terminal device may also be referred to as a communication device, user equipment (UE) , a subscriber station (SS) , a portable subscriber station, a mobile station (MS) , or an access terminal (AT) .
  • UE user equipment
  • SS subscriber station
  • MS mobile station
  • AT access terminal
  • the terminal device may include, but not limited to, a mobile phone, a cellular phone, a smart phone, voice over IP (VoIP) phones, wireless local loop phones, a tablet, a wearable terminal device, a personal digital assistant (PDA) , portable computers, desktop computer, image capture terminal devices such as digital cameras, gaming terminal devices, music storage and playback appliances, vehicle-mounted wireless terminal devices, wireless endpoints, mobile stations, laptop-embedded equipment (LEE) , laptop-mounted equipment (LME) , USB dongles, smart devices, wireless customer-premises equipment (CPE) , an Internet of Things (IoT) device, a watch or other wearable, a head-mounted display (HMD) , a vehicle, a drone, a medical device and applications (e.g., remote surgery) , an industrial device and applications (e.g., a robot and/or other wireless devices operating in an industrial and/or an automated processing chain contexts) , a consumer electronics device, a device operating on commercial and/
  • the terminal device may also correspond to Mobile Termination (MT) part of the integrated access and backhaul (IAB) node (a.k.a. a relay node) .
  • MT Mobile Termination
  • IAB integrated access and backhaul
  • the terms “terminal device” , “communication device” , “terminal” , “user equipment” and “UE” may be used interchangeably.
  • a user equipment apparatus such as a cell phone or tablet computer or laptop computer or desktop computer or mobile IoT device or fixed IoT device
  • This user equipment apparatus can, for example, be furnished with corresponding capabilities as described in connection with the fixed and/or the wireless network node (s) , as appropriate.
  • the user equipment apparatus may be the user equipment and/or or a control device, such as a chipset or processor, configured to control the user equipment when installed therein. Examples of such functionalities include the bootstrapping server function and/or the home subscriber server, which may be implemented in the user equipment apparatus by providing the user equipment apparatus with software configured to cause the user equipment apparatus to perform from the point of view of these functions/nodes.
  • FIG. 1 shows an example communication network 100 in which embodiments of the present disclosure can be implemented.
  • the communication network 100 may comprise a network device 120 (hereinafter may also be referred to as a gNB 120 or a second device 120) .
  • the communication network 100 may also comprise a terminal device 110-1 (hereinafter may also be referred to as a UE 110-1 or a first device 110-1) .
  • the network device 120 may communicate with the terminal devices 110-1.
  • the communication network 100 may also comprise a further terminal device 110-2 (hereinafter may also be referred to as a further UE 110-2 or a third device 110-2) .
  • the terminal devices 110-1 and 110-2 may communicate with each other.
  • the terminal devices 110-1 can be considered as a transmitting UE and the further terminal device 110-2 can be considered as a receiving UE.
  • the gNB is responsible for the resource allocation of the sidelink transmission, where the use cases intended for NR V2X can generate a diverse array of periodic and aperiodic message types. For example, as shown in FIG. 1, the gNB 120 may provide grants of sidelink resources to the UE 110-1 for the sidelink communication between the UE 110-1 and UE 110-2 in resource allocation mode 1.
  • the communication network 100 may also comprise one or more other UEs (not shown) , which can communicate with the UE 110-1 in the sidelink communication.
  • the UE 110-1 may act as a cluster head in the UE cluster. It is to be understood that the number of terminal devices and network devices are only for the purpose of illustration without suggesting any limitations.
  • the communication network 100 may include any suitable number of terminal devices adapted for implementing embodiments of the present disclosure.
  • the communication network 100 can be implemented in a scenario of SL communication.
  • the communication between terminal devices (for example, V2V, V2P, V2I communications) can be performed via sidelinks.
  • information may be transmitted from a Transmit (TX) terminal device to one or more Receive (RX) terminal devices in a broadcast, or groupcast, or unicast manner.
  • TX Transmit
  • RX Receive
  • the network 100 may be a Code Division Multiple Access (CDMA) network, a Time Division Multiple Address (TDMA) network, a Frequency Division Multiple Access (FDMA) network, an Orthogonal Frequency-Division Multiple Access (OFDMA) network, a Single Carrier-Frequency Division Multiple Access (SC-FDMA) network or any others.
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Address
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal Frequency-Division Multiple Access
  • SC-FDMA Single Carrier-Frequency Division Multiple Access
  • Communications discussed in the network 100 may 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-A LTE-Evolution
  • WCDMA Wideband Code Division Multiple Access
  • CDMA Code Division Multiple Access
  • GSM Global System for Mobile Communications
  • the communications 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.
  • the techniques described herein may be used for
  • the unlicensed sidelink or unlicensed Device to Device (D2D) , or unlicensed Vehicle to Everything (V2X) , will be one of the interesting topics to be studied.
  • D2D Device to Device
  • V2X Vehicle to Everything
  • central node can be any device, i.e., a 5G NR gNB or a UE terminal device.
  • the central node can be considered as the 5G NR gNB.
  • resource allocation mode-1 of NR-SL
  • resource allocation mode-2 the gNB is responsible for the resource allocation of NR-SL communication, where the use cases intended for NR V2X can generate a diverse array of periodic and aperiodic message types. Therefore, resource allocation mode 1 can provide dynamic grants of sidelink resources from a gNB, as well as grants of periodic sidelink resources configured semi-statically by RRC, termed sidelink configured grants.
  • the gNB scheduling activity is driven by the UE reporting its sidelink traffic characteristics to the gNB, or by performing a sidelink BSR procedure similar to that on Uu to request a sidelink resource allocation from gNB.
  • a gNB could perform the channel sensing on the unlicensed band, and when the sensing channel is successfully occupied by the gNB, the gNB may grant the resource allocation to UE for the SL communication initiated from the UE.
  • This scenario is more benefit for the short-range communication, such as in-door or in-car communications where the central node is nearby or not far-from the devices performing SL transmissions. From power saving perspective, the central node may better take care of the main responsibility of channel sensing and occupation, and it saves the power for devices performing SL transmissions.
  • LBT Listen Before Talk
  • FBE Frame Based Equipment
  • LBE Load Based Equipment
  • FBE channel sensing is performed at fixed time instants; if the channel is busy, the base station may back off for a fixed time period and senses the channel again after this period.
  • LBE approach the channel sensing is performed at any time instant and random back-off is used if the channel is found busy.
  • Type 1 LBT Type 2A/2B LBT
  • Type 2C LBT Type 2C LBT
  • the LBT Type 1 which can also be referred to as LBT Category 4 (LBT Cat. 4) , is always used by the initiating device whenever it does not have a pre-existing Channel Occupancy Time (COT) towards the responding device.
  • COT Channel Occupancy Time
  • LBT Type 2A and LBT Type 2B which may also be referred to as LBT Category 2 (LBT Cat. 2) , may be used in different cases. It is a form of single-shot or “fast” LBT. It is used if the gNB and UE are sharing a COT, but the interval between transmissions is larger than 16us.
  • the LBT Type 2C which may also be referred to as LBT Category 1 (LBT Cat. 1)
  • LBT Category 1 LBT Cat. 1
  • the COT has a maximum duration defined in regulations.
  • the LBT Type 1 is defined as a continuous sensing of the channel of a device for at least N CCA intervals. Once the channel is declared as idle, the sensing/initiating device can access the channel for a maximum time, which is also known as the MCOT. During the time, the sensing device can grant access to the responding UEs by performing COT sharing. Within the shared COT session, the responding UEs are allowed to access the channel by performing LBT Type 2 (A/B/C) . The main benefit of COT sharing is to reduce LBT delay and LBT overhead at the responding devices.
  • the central node may act as the COT initiating device by performing Cat. 4 LBT or Cat. 2 LBT, in case of LBE or FBE, respectively.
  • the sidelink UEs which may act as COT responding devices, are able to perform transmissions within the COT initiated by the central node.
  • the UE may send request for gNB performing CCA/LBT-based Mode-1 SL RA.
  • the transmission can be done via the Uu-interface of licensed band.
  • the gNB may perform the LBT. If the channel is successfully occupied by gNB via LBT sensing, the gNB grants the resource allocation to UE via the sensed unlicensed band with NR-U format during the COT.
  • the UE may initialize the SL communication with other UE during the shared COT in the unlicensed band.
  • the UE transmits the HARQ/ACK feedback to gNB.
  • the UE can feedback to gNB for each TB of sidelink transmission via Uu interface.
  • the transmission of the HARQ/ACK feedback is still needed to be discussed.
  • the present disclosure provides solutions of unlicensed sidelink communication with central node resource allocation.
  • FIG. 2 show a schematic process of unlicensed sidelink communication with central node resource allocation.
  • the process 200 will be described with reference to FIG. 1.
  • the process 200 may involve the UE 110-1, the gNB 120 and the further UE 110-2 as illustrated in FIG. 1.
  • the gNB 120 may perform a channel sensing procedure, i.e. a LBT procedure. If the channel is successfully occupied by gNB 120 via LBT sensing, the gNB 120 may generate 204 an indication of a resource allocation grant for the UE 110-1 to perform a sidelink transmission and transmit 206 the indication to the UE 110-1 in a COT obtained by the LBT procedure.
  • a channel sensing procedure i.e. a LBT procedure.
  • the UE 110-1 may determine 208 whether the resource allocation grant can be obtained from the indication. If the resource allocation grant is successfully obtained from the indication, the UE 110-1 may determine that the resource allocation grant is valid and generate first information containing HARQ-feedback with ACK. Hereinafter the first information may be referred to as Sidelink Control Information (SCI) . If the resource allocation grant is unsuccessfully obtained from the indication, the UE 110-1 may determine that the resource allocation grant is invalid and generate SCI containing HARQ-feedback with NACK.
  • SCI Sidelink Control Information
  • the UE 110-1 may transmit 210 the SCI to both the gNB 120 and the UE 110-2 in a sidelink transmission initiated from the UE 110-1.
  • the transmission of the SCI can be performed in the COT obtained by the gNB 120.
  • the UE 110-1 can transmit the SCI to gNB 120 and the UE 110-2 via a Physical Sidelink Control Channel (PSCCH) . Both gNB 120 and UE 110-2 may monitor the PSCCH.
  • PSCCH Physical Sidelink Control Channel
  • the gNB 120 may determine 212 that the resource allocation grant is successfully received by the UE 110-1.
  • the UE 110-2 may determine 214 that the resource allocation grant indicated in the SCI is valid.
  • the UE 110-1 may further receive second information from the UE 110-1, which may indicate the data payload is to be transmitted from the UE 110-1 to the UE 110-2.
  • the second information may also be referred to as a further SCI.
  • the UE 110-2 may receive 216 the data payload from the UE 110-1.
  • the transmission of the data payload and the second information from the UE 110-1 to the UE 110-2 can be performed via a Physical Sidelink Shared Channel (PSSCH) .
  • PSSCH Physical Sidelink Shared Channel
  • the UE 110-2 may also transmit 218 a HARQ feedback for the transmission of the data payload from the UE 110-1 to the UE 110-2. For example, if the UE 110-1 receives a HARQ feedback with ACK from the UE 110-2, the UE 110-1 may be aware of a successfully transmission of the data payload. If the UE 110-1 receives a HARQ feedback with NACK from the UE 110-2, the UE 110-1 may, for example, retransmit the data payload to the UE 110-2.
  • the UE 110-1 may determine 220 information associated with the sidelink transmission performed by the UE 110-1.
  • the UE 110-1 may determine that the sidelink transmission is completed and generate the information indicating that the sidelink transmission is terminated or the gNB may quit the channel sensing for the sidelink transmission performed by the UE 110-1.
  • the UE 110-1 may determine that the sidelink transmission is not successfully performed and generate the information indicating that statistic of HARQ feedback of the sidelink transmissions.
  • the statistic may indicating the HARQ feedbacks with NACK or HARQ feedbacks with ACK received by the UE 110-1 in a certain period.
  • the information may also comprise a status indication in case the number of NACKs received by the UE 110-1 exceeded a threshold number.
  • the threshold number can be configured by gNB 120 to UE 110-1.
  • the information may also comprise an indication that a ratio of non-acknowledgement of received by the first device for the sidelink transmission between the first device and a third device and acknowledgement of received by the first device for the sidelink transmission exceeds a threshold ratio.
  • the UE 110-1 may transmit 222 the information to the gNB 120.
  • the transmission of the information can be performed via a PSCCH or a PSSCH.
  • the gNB 120 may, for example, release the COT obtained by the previously LBT procedure.
  • the gNB 120 may need to extend the number of default CCA attempts in order to have more COTs for sidelink transmissions between the UE 110-1 and the UE 110-2. For example, the gNB 120 may perform a further CCA and obtain one more COT. Then the gNB 120 may transmit 224 an indication of the new obtained COT to the UE 110-1 for the UE 110-1 to perform the sidelink transmission.
  • act 210 by which the gNB 120 and the UE 110-2 both receives the SCI transmit from the UE 110-1.
  • the gNB 120 may determine 226 that the resource allocation grant is unsuccessfully received by the UE 110-1. Then the gNB 120 may retransmit 228 the resource allocation grant to the UE 110-1.
  • the UE 110-2 may determine 230 that the resource allocation grant indicated in the SCI is valid, the UE 110-2 may quit from further reception of PSSCH.
  • the indication may also comprise a reference identifier indicating which UE can use the COT. This indication may be referred to as channel readiness indication.
  • the gNB may utilize the new introduced channel readiness indication to indicate which group can use the ongoing COT. For example, the gNB 120 can “enable” the sidelink transmission for the group of UE 110-1 and UE 110-2 and “disable” the other group.
  • the group is enabled to perform the sidelink transmission during the COT can be indicated by an index of the UE.
  • the group is enabled to perform the sidelink transmission during the COT can be indicated by a cell-radio network temporary identifier.
  • the UE can determine the cell-radio network temporary identifier by decoding the resource allocation grant.
  • an approach for transmitting the HARQ/ACK feedback from UE to gNB in unlicensed band with NR-SL is proposed. In this way, the resources during COT for SL communication can be effective unitized.
  • FIG. 3 shows a flowchart of an example method 300 of unlicensed sidelink communication with central node resource allocation according to some example embodiments of the present disclosure.
  • the method 300 can be implemented at the first device 110-1 as shown in FIG. 1. For the purpose of discussion, the method 300 will be described with reference to FIG. 1.
  • the first device receives, from a second device, an indication of a resource allocation grant for the first device to perform a sidelink transmission.
  • the first device transmits first information in the sidelink transmission, the first information at least indicating a validity of the resource allocation grant.
  • the indication is received via an unlicensed radio transmission format; or a licensed Uu transmission format.
  • the first device may generate the first information comprising an acknowledgement for the resource allocation grant.
  • the first device may generate the first information comprising a non-acknowledgement for the resource allocation grant.
  • the first device may transmit the first information to the second device via a physical sidelink control channel.
  • the first device may transmit second information and data payload to a third device in the sidelink transmission via a physical sidelink shared channel, the second information at least indicating the data payload is to be transmitted from the first device to the third device.
  • the first device may determine information associated with the sidelink transmission performed by the first device; and transmit the information to the second device.
  • the information associated with the sidelink transmission comprises an indication for the second device to quit or stop a channel sensing for the sidelink transmission performed by the first device, an indication that the sidelink transmission is terminated, a result of a statistic of Hybrid Automatic Repeat Request feedback of the sidelink transmissions between the first device and a third device, an indication that the number of non-acknowledgement received by the first device for the sidelink transmission between the first device and a third device exceeds a threshold number, or an indication that a ratio of non-acknowledgement of received by the first device for the sidelink transmission between the first device and a third device and acknowledgement of received by the first device for the sidelink transmission exceeds a threshold ratio.
  • the information is transmitted via a physical sidelink control channel or a physical sidelink shared channel.
  • the first device may transmit the first information on resources indicated by the resource allocation grant, in accordance with a determination that a reference identifier is obtained with the resource allocation grant, the reference identifier comprising an identification of the first device, a cell-radio network temporary identifier associated with the first device or an identification of sidelink communication of first device.
  • the first device comprises a terminal device and the second device comprises a network device.
  • the third device comprises a terminal device.
  • FIG. 4 shows a flowchart of an example method 400 of unlicensed sidelink communication with central node resource allocation according to some example embodiments of the present disclosure.
  • the method 400 can be implemented at the second device 120 as shown in FIG. 1.
  • the method 400 will be described with reference to FIG. 1.
  • the second device performs LBT procedure.
  • the second device generates, based on the result of the listen before talk procedure, an indication of a resource allocation grant for a first device to perform a sidelink transmission.
  • the second device transmits the indication to the first device.
  • the second device receives, from the first device, SCI in the sidelink transmission, the first information at least indicating a validity of the resource allocation grant.
  • the indication is transmitted via an unlicensed radio transmission format; or a licensed Uu transmission format.
  • the second device may receive the first information from the first device via a physical sidelink control channel.
  • the second device may determine that the resource allocation grant is successfully decoded by the first device.
  • the second device may determine that the resource allocation grant is unsuccessfully decoded by the first device and retransmit the indication of a resource allocation grant to the first device.
  • the second device may receive, from the first device, information associated with the sidelink transmission performed by the first device.
  • the information associated with the sidelink transmission comprises an indication for the second device to quit or stop a channel sensing for the sidelink transmission performed by the first device, an indication that the sidelink transmission is terminated, a result of a statistic of Hybrid Automatic Repeat Request feedback of the sidelink transmissions between the first device and a third device, an indication that the number of non-acknowledgement received by the first device for the sidelink transmission between the first device and a third device exceeds a threshold number; or an indication that a ratio of non-acknowledgement of received by the first device for the sidelink transmission between the first device and a third device and acknowledgement of received by the first device for the sidelink transmission exceeds a threshold ratio.
  • the information is received via a physical sidelink control channel or a physical sidelink shared channel.
  • the second device may generate the indication based on a reference identifier comprising an identification of the first device, a cell-radio network temporary identifier associated with the first device or an identification of sidelink communication of first device.
  • the first device comprises a terminal device and the second device comprises a network device.
  • the third device comprises a terminal device.
  • FIG. 5 shows a flowchart of an example method 500 of unlicensed sidelink communication with central node resource allocation according to some example embodiments of the present disclosure.
  • the method 500 can be implemented at the third device 110-2 as shown in FIG. 1.
  • the method 500 will be described with reference to FIG. 1.
  • the third device receives, from a first device, the first information in a sidelink transmission, the first information at least indicating a validity of a resource allocation grant for the first device to perform the sidelink transmission.
  • the third device determines the validity of a resource allocation grant based on the first information.
  • the third device may receive the first information from the first device via a physical sidelink control channel.
  • the third device may determine that the resource allocation grant is valid.
  • the third device may receive second information from the first device via a physical sidelink shared channel, the second information at least indicating the data payload is to be transmitted from the first device to the third device and receive data payload from the first device in the sidelink transmission via a physical sidelink shared channel based on the second information.
  • the third device may determine that the resource allocation grant is invalid.
  • the first device comprises a terminal device and the third device comprises a terminal device.
  • an apparatus capable of performing the method 300 may comprise means for performing the respective steps of the method 300.
  • the means may be implemented in any suitable form.
  • the means may be implemented in a circuitry or software module.
  • the apparatus comprises means for receiving, at a first device and from a second device, an indication of a resource allocation grant for the first device to perform a sidelink transmission; and means for transmitting first information in the sidelink transmission, the first information at least indicating a validity of the resource allocation grant.
  • an apparatus capable of performing the method 400 may comprise means for performing the respective steps of the method 400.
  • the means may be implemented in any suitable form.
  • the means may be implemented in a circuitry or software module.
  • the apparatus comprises means for performing a listen before talk procedure, means for generating, at a second device based on a result of the listen before talk procedure, an indication of a resource allocation grant for a first device to perform a sidelink transmission; means for transmitting the indication to the first device; and means for receiving, from the first device first information in the sidelink transmission, the first information at least indicating a validity of the resource allocation grant.
  • an apparatus capable of performing the method 500 may comprise means for performing the respective steps of the method 500.
  • the means may be implemented in any suitable form.
  • the means may be implemented in a circuitry or software module.
  • the apparatus comprises means for receiving, at a third device and from a first device first information in a sidelink transmission, the first information at least indicating a validity of a resource allocation grant for the first device to perform the sidelink transmission; and means for the validity of a resource allocation grant based on the first information.
  • FIG. 6 is a simplified block diagram of a device 600 that is suitable for implementing embodiments of the present disclosure.
  • the device 600 may be provided to implement the communication device, for example the UE 110-1, the gNB 120 and the further UE 110-2 as shown in FIG. 1.
  • the device 600 includes one or more processors 610, one or more memories 640 coupled to the processor 610, and one or more transmitters and/or receivers (TX/RX) 640 coupled to the processor 610.
  • TX/RX transmitters and/or receivers
  • the TX/RX 640 is for bidirectional communications.
  • the TX/RX 640 has at least one antenna to facilitate communication.
  • the communication interface may represent any interface that is necessary for communication with other network elements.
  • the processor 610 may be of any type suitable to the local technical network and may include one or more of the following: general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multicore processor architecture, as non-limiting examples.
  • the device 600 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.
  • the memory 620 may include one or more non-volatile memories and one or more volatile memories.
  • the non-volatile memories include, but are not limited to, a Read Only Memory (ROM) 624, an electrically programmable read only memory (EPROM) , a flash memory, a hard disk, a compact disc (CD) , a digital video disk (DVD) , and other magnetic storage and/or optical storage.
  • the volatile memories include, but are not limited to, a random access memory (RAM) 622 and other volatile memories that will not last in the power-down duration.
  • a computer program 630 includes computer executable instructions that are executed by the associated processor 610.
  • the program 630 may be stored in the ROM 620.
  • the processor 610 may perform any suitable actions and processing by loading the program 630 into the RAM 620.
  • the embodiments of the present disclosure may be implemented by means of the program 630 so that the device 600 may perform any process of the disclosure as discussed with reference to FIGs. 2 to 5.
  • the embodiments of the present disclosure may also be implemented by hardware or by a combination of software and hardware.
  • the program 630 may be tangibly contained in a computer readable medium which may be included in the device 600 (such as in the memory 620) or other storage devices that are accessible by the device 600.
  • the device 600 may load the program 630 from the computer readable medium to the RAM 622 for execution.
  • the computer readable medium may include any types of tangible non-volatile storage, such as ROM, EPROM, a flash memory, a hard disk, CD, DVD, and the like.
  • FIG. 7 shows an example of the computer readable medium 700 in form of CD or DVD.
  • the computer readable medium has the program 630 stored thereon.
  • 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 representations, it is to be understood that the block, device, system, technique or method 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 methods 300-500 as described above with reference to FIGs. 3-5.
  • 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 device, 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 computer program codes or related data may be carried by any suitable carrier to enable the device, device or processor to perform various processes and operations as described above.
  • Examples of the carrier include a signal, computer readable medium, and the like.
  • the computer readable medium may be a computer readable signal medium or a computer readable storage medium.
  • a computer readable medium may include but not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device, or any suitable combination of the foregoing. More specific examples of the computer 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.

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Abstract

Des modes de réalisation de la présente invention concernent des dispositifs, des procédés, des appareils et des supports de stockage lisibles par ordinateur pour des communications de liaison latérale sans licence avec attribution de ressources de nœud centrale. Le procédé comprend la réception, au niveau d'un premier dispositif et en provenance d'un second dispositif, d'une indication d'une autorisation d'attribution de ressources pour le premier dispositif afin de réaliser une transmission de liaison latérale ; et la transmission de premières informations dans la transmission de liaison latérale, les premières informations indiquant au moins une validité de l'autorisation d'attribution de ressources. La présente invention concerne une approche pour transmettre la rétroinformation HARQ/ACK d'un UE vers un nœud gNB dans une bande sans licence avec une liaison latérale de type nouvelle radio, NR-SL. De cette façon, les ressources durant un temps COT pour une communication de liaison latérale peuvent être effectivement unifiées.
PCT/CN2021/083658 2021-03-29 2021-03-29 Communication de liaison latérale sans licence avec attribution de ressources de nœud centrale WO2022204891A1 (fr)

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PCT/CN2021/083658 WO2022204891A1 (fr) 2021-03-29 2021-03-29 Communication de liaison latérale sans licence avec attribution de ressources de nœud centrale
CN202180096496.5A CN117099458A (zh) 2021-03-29 2021-03-29 具有中央节点资源分配的免许可侧链路通信

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