WO2023097660A1 - Procédé et appareil d'établissement de monodiffusion - Google Patents

Procédé et appareil d'établissement de monodiffusion Download PDF

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Publication number
WO2023097660A1
WO2023097660A1 PCT/CN2021/135359 CN2021135359W WO2023097660A1 WO 2023097660 A1 WO2023097660 A1 WO 2023097660A1 CN 2021135359 W CN2021135359 W CN 2021135359W WO 2023097660 A1 WO2023097660 A1 WO 2023097660A1
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Prior art keywords
message
layer
unicast
transmitting
broadcast
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PCT/CN2021/135359
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English (en)
Inventor
Jing HAN
Congchi ZHANG
Lianhai WU
Haiming Wang
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Lenovo (Beijing) Limited
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Priority to PCT/CN2021/135359 priority Critical patent/WO2023097660A1/fr
Publication of WO2023097660A1 publication Critical patent/WO2023097660A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/10—Integrity
    • H04W12/106—Packet or message integrity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/60—Context-dependent security
    • H04W12/69—Identity-dependent
    • H04W12/71—Hardware identity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/005—Discovery of network devices, e.g. terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers

Definitions

  • Embodiments of the present application are related to wireless communication technology, especially, related to unicast establishment between user equipment (UE) in sidelink (SL) .
  • a UE may communicate with another UE via a data path supported by an operator’s network, e.g. a cellular or a Wi-Fi network infrastructure.
  • the data path supported by the operator network may include a base station (BS) and multiple gateways.
  • BS base station
  • a radio link or a sidelink can be established between the two UEs to provide direction communication and without going through a link to the BS.
  • sidelink may refer to a direct radio link established for communicating among devices, e.g., UEs, as opposed to communication link via the cellular infrastructure (uplink and downlink) as discussed above.
  • SL may also refer to a sidelink communication link.
  • V2X vehicle to everything
  • a specific PC5-S procedure i.e., a unicast establishment procedure between an initiating UE which initiates the unicast establishment procedure and a target UE according to TS 23.287, wherein the first message, e.g., a direct communication request (DCR) message during the PC5-S procedure is broadcast or unicast (if has peer UE context) .
  • DCR direct communication request
  • the initiating UE will use a layer-2 ID of itself and a default broadcast destination layer-2 identity (ID) for transmitting the DCR message via a broadcast mode.
  • ID broadcast destination layer-2 identity
  • MAC media access control
  • SCI sidelink control information
  • the DCR message is broadcast by the initiating UE as illustrated above, since the layer-2 ID used for unicast transmission of the following messages during the unicast establishment procedure is a new layer-2 ID assigned by the target UE, which is unknown by the initiating UE, the following messages will be dropped in MAC layer of the initiating UE during filtering MAC PDU (s) . Accordingly, access stratum (AS) layer of the initiating UE will not receive these messages.
  • AS access stratum
  • One objective of the embodiments of the present application is to provide a technical solution for wireless communication, especially for unicast establishment.
  • Some embodiments of the present application provide a UE, which includes: at least one receiving circuitry; at least one transmitting circuitry; and at least one processor coupled to the at least one receiving circuitry and the at least one transmitting circuitry.
  • the at least one processor is configured to: broadcast, via the at least one transmitting circuitry, a first message for initiating a unicast establishment procedure from the UE; and receive, via the at least one receiving circuitry, a second message with an ID known by the UE in response to the first message from a second UE.
  • Some other embodiments of the present application provide a method, which includes: broadcasting a first message for initiating a unicast establishment procedure from a first UE; and receiving a second message with an ID known by the first UE in response to the first message, from a second UE.
  • the second message is a unicast message including a layer-2 ID of the second UE, the ID known by the UE is used as a source ID for transmitting the second message, and ID of the UE is used as a destination ID for transmitting the second message.
  • the ID known by the UE is a first layer-2 ID indicated in the first message.
  • the ID known by the UE is a layer-2 ID of the UE.
  • the second message is a broadcast message including a layer-2 ID of the second UE, and the ID known by the UE is a broadcast destination layer-2 ID for transmitting the second message which is preconfigured, configured or stored in the UE.
  • the at least one processor is configured to: obtain and pass the layer-2 ID of the second UE to AS layer of the UE.
  • the second message is a broadcast message associated with security
  • the ID known by the UE is a first layer-2 ID indicated in the first message for transmitting the second message.
  • the second message is a broadcast message associated with security
  • the ID known by the UE is a layer-2 ID of the UE.
  • the at least one processor is configured to: generate the first layer-2 ID; and use the first layer-2 ID in AS layer of the UE for reception.
  • MAC layer of the UE filters MAC PDU according to the ID known by the UE.
  • the second message is an authentication request message or a security command message.
  • Some yet other embodiments of the present application also provide a UE, which includes: at least one receiving circuitry; at least one transmitting circuitry; and at least one processor coupled to the at least one receiving circuitry and the at least one transmitting circuitry, wherein the at least one processor is configured to: receive, via the at least one receiving circuitry, a first message for initiating a unicast establishment procedure from a first UE; and transmit, via the at least one transmitting circuitry, a second message with an ID known by the first UE in response to the first message, to the first UE.
  • Some yet other embodiments of the present application also provide a method, which includes: receiving a first message for initiating a unicast establishment procedure from a first UE; and transmitting a second message with an ID known by the first UE in response to the first message, to the first UE.
  • the second message is a unicast message including a layer-2 ID of the UE
  • the ID known by the first UE is used as a source ID for transmitting the second message
  • ID of the first UE is used as a destination ID for transmitting the second message.
  • the ID known by the first UE is a first layer-2 ID indicated in the first message.
  • the ID known by the first UE is a layer-2 ID of the first UE.
  • the second message is a broadcast message including a layer-2 ID of the UE, and the ID known by the first UE is a broadcast destination layer-2 ID for transmitting the second message which is preconfigured, configured or stored in the first UE.
  • the second message is a broadcast message associated with security
  • the ID known by the first UE is a first layer-2 ID indicated in the first message for transmitting the second message.
  • the second message is a broadcast message associated with security
  • the ID known by the first UE is a layer-2 ID of the first UE.
  • embodiments of the present application propose a novel unicast establishment solution, which will avoid message (s) being dropped in MAC layer of a reception UE during a unicast establishment procedure.
  • FIG. 1A is a schematic view of an exemplary in-coverage scenario in SL communication according to some embodiments of the present application.
  • FIG. 1B is a schematic view of an exemplary partial coverage scenario in SL communication according to some other embodiments of the present application.
  • FIG. 1C is a schematic view of an exemplary out-of-coverage scenario in SL communication according to some yet other embodiments of the present application.
  • FIG. 2 is a flow chart illustrating an exemplary unicast establishment procedure according to TS 24.587.
  • FIG. 3 is a flow chart illustrating an exemplary procedure of a method of unicast establishment according to some embodiments of the present application.
  • FIG. 4 is a flow chart illustrating an exemplary unicast establishment procedure according to some embodiments of the present application.
  • FIG. 5 is a flow chart illustrating an exemplary unicast establishment procedure according to some other embodiments of the present application.
  • FIG. 6 is a flow chart illustrating an exemplary unicast establishment procedure according to some yet other embodiments of the present application.
  • FIG. 7 is a flow chart illustrating an exemplary unicast establishment procedure according to some yet other embodiments of the present application.
  • FIG. 8 is a flow chart illustrating an exemplary unicast establishment procedure according to some yet other embodiments of the present application.
  • FIG. 9 illustrates a block diagram of an apparatus of unicast establishment according to some embodiments of the present application.
  • FIG. 10 illustrates a block diagram of an apparatus of unicast establishment according to some other embodiments of the present application.
  • SL communication supports UE-to-UE direct communication.
  • SL communication may be categorized according to the wireless communication technologies adopted.
  • SL communication may include NR SL communication and V2X SL communication etc.
  • NR SL communication may refer to AS functionality enabling at least V2X communication as defined in 3GPP specification TS 23.287 between neighboring UEs, using NR technology but not traversing any network node.
  • V2X SL communication (e.g., specified in 3GPP specification TS 36.311) may refer to AS functionality enabling V2X communication as defined in 3GPP specification TS 23.285 between neighboring UEs, using evolved-universal mobile telecommunication system (UMTS) terrestrial radio access (UTRA) (E-UTRA) technology, but not traversing any network node.
  • UMTS evolved-universal mobile telecommunication system
  • UTRA terrestrial radio access
  • SL communication may refer to NR SL communication, V2X SL communication, or any SL communication adopting other wireless communication technologies.
  • in-coverage scenario refers to the case where both the two UEs are inside the network
  • partial coverage scenario refers to that only one UE remains inside the network coverage but the other UE is outside the network coverage
  • out-of-coverage scenario refers to the case where both the two UEs are outside the network coverage.
  • a UE may transfer among the in-coverage scenario, partial coverage scenario and out-of-coverage scenario.
  • FIGS. 1A-1C illustrate examples of the three network coverage scenarios respectively, wherein, FIG. 1A is a schematic view of an exemplary in-coverage scenario in SL communication according to some embodiments of the present application, FIG. 1B is a schematic view of an exemplary partial coverage scenario in SL communication according to some other embodiment of the present application, and FIG. 1C is a schematic view of an exemplary out-of-coverage scenario in SL communication according to some yet other embodiment of the present application.
  • each exemplary network coverage scenario there are a plurality of UEs, such as a first UE 101a and second UE 101b, and a base station 103, which are shown for illustrating the embodiment of the present application in a simplified manner.
  • UEs such as a first UE 101a and second UE 101b
  • base station 103 which are shown for illustrating the embodiment of the present application in a simplified manner.
  • Persons skilled in the art should understand there can be more base stations 103 and more UEs in or outside of the coverage of the base stations 103.
  • Persons skilled in the art should well know that the wording "first" and "second” are only used to clearly illustrate embodiments of the present application, and should not be used to limit the substance of the present application.
  • the UEs and base station 103 may support communication based on, for example, 3G, LTE, LTE-advanced (LTE-A) , NR, or other suitable protocol (s) .
  • the BS 103 may be referred to as an access point, an access terminal, a base, a base unit, a macro cell, a Node-B, an evolved Node B (eNB) , a gNB, an ng-eNB, a home Node-B, a relay node, or a device, or described using other terminology used in the art.
  • the UEs e.g., the first UE 101a or second UE 101b may be any terminal device, for example, but is not limited to, a computing device, a wearable device, a mobile device, an internet of things (IoT) device, a road side unit (RSU) , etc.
  • the base station 103 may define one or more cells, and each cell may have a coverage area 105. As shown in FIG. 1A, in the in-coverage scenario, both the first UE 101a and second UE 101b are within the coverage of the base station 103.
  • the first UE 101a and the second UE 101b may exchange V2X messages with the base station 103 via, for example, a Uu link, and exchange V2X messages between each other through a SL, for example, a PC5 interface as defined in TS 23.303.
  • one UE may act as a transmitter, i.e., a transmission UE (also referred to as "Tx UE” )
  • the other UE may act as a receiver, i.e., a reception UE (also referred to as "Rx UE” )
  • the Tx UE for example the first UE 101a, may initiate a unicast transmission to the Rx UE, for example 101b, and the Rx UE 101b may receive the unicast transmission from the Tx UE, for example the first UE 101a.
  • the first UE 101a may exchange V2X messages with the base station 103 via Uu link, and exchange V2X messages with the second UE 101b through a SL, for example, PC5 interface as defined in TS 23.303. Since the second UE 101b is outside of the coverage range associated with the base station 103, it cannot exchange messages with the base station 103 via Uu link.
  • the first UE 101a may act as a Tx UE and initiate a unicast transmission
  • the second UE 101b may act as a Rx UE and receive the unicast transmission from the Tx UE, and vice versa.
  • both the first UE 101a and the second UE 101b are outside of the coverage of the base station 103, and cannot exchange messages with the base station 103 via Uu link.
  • the first UE 101a may exchange V2X messages with the second UE 101b through SL, for example, PC5 interface as defined in TS 23.303.
  • the first UE 101a may act as a Tx UE and initiate a unicast transmission
  • the second UE 101b may act as a Rx UE and receive the unicast transmission from the Tx UE, and vice versa.
  • FIG. 2 is a flow chart illustrating an exemplary unicast establishment procedure according to TS 24.587, wherein the DCR message is transmitted in the broadcast mode and layer-2 ID is used for transmission of PC5-S messages.
  • a first UE proposing desires for unicast connection establishment may broadcast a first message for unicast establishment in step 201, which may be triggered by a higher layer (e.g., a layer higher than whole AS layer) of the first UE to do unicast transmission on SL.
  • the higher layer of the first UE may pass the first message, e.g., DIRECT LINK ESTABLISHMENT REQUEST (i.e., a DCR message) to the lower layers for transmission along with the layer-2 ID of the first UE for unicast communication and the destination (or target) layer-2 ID used for unicast initial signaling broadcast.
  • the destination layer-2 ID used for unicast initial signaling broadcast is also known for other UEs, e.g., a second UE (also referred to as "a destination UE” or "a target UE” etc. ) to receive the broadcast message.
  • the second UE may also desire to establish a unicast link with the first UE. Then, in step 203, the second UE will uniquely assign a PC5 link identifier, create a PC5 unicast link context and assign a layer-2 ID for this PC5 unicast link. The newly assigned layer-2 ID will replace the target layer-2 ID (i.e., the destination layer-2 ID used for unicast initial signaling broadcast) as received on the DIRECT LINK ESTABLISHMENT REQUEST. Then, the second UE will store the assigned layer-2 ID and the layer-2 ID of the first UE.
  • target layer-2 ID i.e., the destination layer-2 ID used for unicast initial signaling broadcast
  • the second UE may initiate a procedure for mutual authentication, transmitting message associated with security to the first UE in the unicast mode, which may include authentication and establishment of security association.
  • a higher layer of the second UE may pass DIRECT LINK AUTHENTICATION REQUEST or DIRECT LINK SECURITY MODE COMMAND to the lower layers of the second UE for unicast transmission to the first UE, wherein the layer-2 ID of the first UE is used as the destination layer-2 ID of the unicast transmission and the newly assigned layer-2 ID is used as the source layer-2 ID of the unicast communication.
  • MAC layer of a reception UE will filter MAC PDU according to the source ID and destination ID that carried in SCI and MAC PDU.
  • MAC layer of the first UE may drop the message associated with security due to the layer-2 ID of the second UE being unknown by the first UE in step 207. Accordingly, AS layer of the first UE cannot receive the message associated with security from the second UE.
  • MAC layer passes the message to upper layer (s) , e.g., packet data convergence protocol (PDCP) layer or radio link control (RLC) layer
  • PDCP packet data convergence protocol
  • RLC radio link control
  • the upper layer will not establish PDCP and RLC entity according to current 3GPP specification, which specifies that for unicast there is only one condition to establish the transmitting and/or receiving RLC/PDCP entity, that is: it requested by upper layer in both transmitting and receiving sides.
  • embodiments of the present application propose a technical solution of unicast establishment.
  • FIG. 3 is a flow chart illustrating an exemplary procedure of a method of unicast establishment according to some embodiments of the present application.
  • a first UE proposing desires for unicast connection establishment may broadcast a first message, e.g., a DCR message for initiating a unicast establishment procedure.
  • the first UE may be any SL UE, e.g., the first UE 101a or the second UE 101b in FIGS. 1A-1C.
  • the destination layer-2 ID of the first message is a default broadcast destination layer-2 ID, which is known by other SL UEs to receive the broadcast information.
  • the destination layer-2 ID of the first message is a broadcast destination layer-2 ID preconfigured, configured or stored in the UE.
  • a second UE may receive the broadcast first message.
  • the second UE may be any other SL UE capable of receiving the first message from the first UE, e.g., the first UE 101a or the second UE 101b in FIGS. 1A-1C.
  • the second UE is shown, persons skilled in the art should well know that one or more other UEs besides the second UE may also receive the first message, and may desire to establish a unicast link.
  • the technical solution illustrated between the first UE and the second UE is also applicable to the unicast establishment procedure between the first UE and any other SL UEs.
  • the second UE will transmit a second message with an ID known by the first UE in response to the first message in step 304.
  • the second message may be a message associated with security, e.g., an authentication request message or a security command message, or other following message during the unicast establishment procedure, which can be transmitted in the unicast mode or the broadcast mode.
  • the ID known by the first UE can be various, e.g., a layer-2 ID generated by the first UE for other SL UEs, or the layer-2 ID of the first UE itself, or a broadcast destination layer-2 ID etc.
  • the broadcast destination layer-2 ID for transmitting the second message may be the same as or different from that for transmitting the first message, and is also a broadcast destination layer-2 ID preconfigured, configured or stored in the first UE. Accordingly, the first UE may receive the second message in step 305. For MAC layer of the first UE, it will filter MAC PDU (s) according to the ID known by the UE in either the unicast mode or the broadcast mode, and thus the second message will not be dropped and will be passed (or delivered) to upper layer of the first UE.
  • MAC layer will filter MAC PDU according to layer-2 ID as follows, which is specified in TS 38.321 and may evolve in the future:
  • the DST field of the decoded MAC PDU subheader is equal to the 8 MSB of any of the Source Layer-2 ID (s) of the UE for which the 16 LSB are equal to the Destination ID in the corresponding SCI
  • the SRC field of the decoded MAC PDU subheader is equal to the 16 MSB of any of the Destination Layer-2 ID (s) of the UE for which the 8 LSB are equal to the Source ID in the corresponding SCI
  • ⁇ 4> deliver the decoded MAC PDU to the disassembly and demultiplexing entity
  • FIG. 4 is a flow chart illustrating an exemplary unicast establishment procedure according to some embodiments of the present application.
  • a first UE proposing desires for unicast connection establishment (also referred to as “a source UE” or “an initiating UE” etc. ) will generate a layer-2 ID (hereafter, referred to as "first layer-2 ID” ) for PC5-S message (s) transmitted by other SL UE (s) to setup security or in response to the first message.
  • a higher layer, e.g., V2X layer of the first UE will pass the first layer-2 ID to AS layer of the first UE. Accordingly, AS layer of the first UE will store the first layer-2 ID for message reception in future.
  • the first UE may broadcast a first message for initiating a unicast establishment procedure.
  • the first layer-2 ID will be included in the first message.
  • the first message is a DCR message, e.g., DIRECT LINK ESTABLISHMENT REQUEST.
  • the destination layer-2 ID of the first message is a broadcast destination layer-2 ID known by other UEs to receive the broadcast information.
  • the first message is broadcast with a preconfigured, configured or stored broadcast destination layer-2 ID in the first UE.
  • a second UE When another SL UE, e.g., a second UE (also referred to as "a destination UE” or “a target UE” etc. ) receives the first message, it may determine to setup security with the first UE or make a response to the first message in step 405.
  • the second UE will store the first layer-2 ID indicated in the first message, and pass it to AS layer of the second UE from a higher layer, e.g., V2X layer for message transmission, e.g., for transmitting a second message to the first UE in the future.
  • the second message may be a message associated with security, e.g., DIRECT LINK AUTHENTICATION REQUEST or DIRECT LINK SECURITY MODE COMMAND, or another response message.
  • the second UE e.g., V2X layer of the second UE may assign a new layer-2 ID as a layer-2 ID of the second UE for unicast communication with the first UE.
  • the second UE will include the layer-2 ID of the second UE in the second message, rather than directly using it as the source layer-ID for transmitting the second message.
  • the second UE will transmit the second message, e.g., DIRECT LINK AUTHENTICATION REQUEST or DIRECT LINK SECURITY MODE COMMAND to the first UE in the unicast mode, that is the second message is a unicast message.
  • the first layer-2 ID is used as the source ID for transmitting the second message, and the layer-2 ID of the first UE itself is used as a destination ID for transmitting the second message.
  • MAC layer of the first UE After receiving the second message in the first UE, MAC layer of the first UE will filter the MAC PDU according to the first layer-2 ID known by the first UE and the layer-2 ID of the first UE in step 409. Accordingly, MAC PDU associated with the second message will not be dropped in MAC layer, and will be passed to higher layer of the first UE. For example, MAC layer of the first UE may filter the MAC PDU according to layer-2 ID as stated above for unicast, which is specified in TS 38.321. As the specification evolves, MAC layer of the first UE may filter the MAC PDU in other manners, which does not affect the substance of the present application.
  • V2X layer of the first UE will obtain the layer-2 ID of the second UE included in the second message and pass it to AS layer of the first UE for future message transmission to and reception from the second UE. Accordingly, the layer-2 ID of the second UE can be used as destination ID or source ID during the following unicast establishment procedure as legacy.
  • the layer-2 ID of the second UE can be used as a destination layer-2 ID for transmitting further message (s) to the second UE in step 411, e.g., transmitting DIRECT LINK AUTHENTICATION RESPONSE in response to DIRECT LINK AUTHENTICATION REQUEST, or transmitting DIRECT LINK SECURITY MODE COMPLETE in response to DIRECT LINK SECURITY MODE COMMAND.
  • the layer-2 ID of The second UE can also use as the source layer-2 ID by the first UE for receiving other message (s) from the second UE in step 413, e.g., receiving DIRECT LINK ESTABLISHMENT ACCEPT from the second UE, which means the unicast link between the first and second UE is established.
  • FIG. 5 is a flow chart illustrating an exemplary unicast establishment procedure according to some other embodiments of the present application. Different from FIG. 4, in embodiments shown in FIG. 5 or the like, the second message is also transmitted in the broadcast mode.
  • a first UE proposing desires for unicast connection establishment (also referred to as "a source UE” or “an initiating UE” etc. ) will generate a layer-2 ID (hereafter, referred to as "first layer-2 ID” ) for PC5-S message (s) transmitted by other SL UE (s) to setup security or in response to the first message.
  • the first UE will add the first layer-2 ID into a destination layer-2 ID list for broadcast reception.
  • a higher layer, e.g., V2X layer of the first UE will pass the first layer-2 ID to AS layer of the first UE. Accordingly, AS layer of the first UE will store the first layer-2 ID for message reception in future.
  • the first UE may broadcast a first message for initiating a unicast establishment procedure.
  • the first layer-2 ID will be included in the first message.
  • the first message is a DCR message, e.g., DIRECT LINK ESTABLISHMENT REQUEST.
  • the destination layer-2 ID of the first message is a broadcast destination layer-2 ID known by other UEs to receive the broadcast information.
  • the first message is broadcast with a preconfigured, configured or stored broadcast destination layer-2 ID in the first UE.
  • a second UE When another SL UE, e.g., a second UE (also referred to as "a destination UE” or “a target UE” etc. ) receives the first message, it may determine to setup security with the first UE or make a response to the first message in step 505.
  • the second UE will store the first layer-2 ID indicated in the first message, and pass it to AS layer of the second UE from a higher layer for message transmission during the unicast establishment procedure, e.g., a second message to the first UE in the future.
  • the second message may be a message associated with security, e.g., DIRECT LINK AUTHENTICATION REQUEST or DIRECT LINK SECURITY MODE COMMAND, or another response message.
  • the second UE e.g., V2X layer of the second UE may assign a new layer-2 ID as a layer-2 ID of the second UE for unicast communication with the first UE.
  • the second UE will include the layer-2 ID of the second UE in the second message, rather than directly using it as the source layer-ID for transmitting the second message.
  • the second UE will broadcast the second message with the first layer-2 ID as the broadcast destination layer-2 ID in step 507.
  • MAC layer of the first UE After receiving the second message, MAC layer of the first UE will filter the MAC PDU according to the first layer-2 ID known by the first UE in step 509. Accordingly, MAC PDU associated with the second message will not be dropped in MAC layer, and will be passed to higher layer of the first UE. For example, MAC layer of the first UE may filter the MAC PDU according to the first layer-2 ID as stated above for broadcast, which is also specified in TS 38.321. Similarly, as the specification evolves, MAC layer of the first UE may filter the MAC PDU in other manners, which does not affect the substance of the present application.
  • V2X layer of the first UE will obtain the layer-2 ID of the second UE included in the second message and pass it to AS layer of the first UE for future message transmission to and reception from the second UE. Accordingly, the layer-2 ID of the second UE can be used as destination ID or source ID during the following unicast establishment procedure as legacy.
  • the layer-2 ID of the second UE can be used as a destination layer-2 ID for transmitting further message (s) to the second UE in step 511, e.g., transmitting DIRECT LINK AUTHENTICATION RESPONSE in response to DIRECT LINK AUTHENTICATION REQUEST, or transmitting DIRECT LINK SECURITY MODE COMPLETE in response to DIRECT LINK SECURITY MODE COMMAND.
  • the layer-2 ID of The second UE can also use as the source layer-2 ID by the first UE for receiving other message (s) from the second UE in step 513, e.g., receiving DIRECT LINK ESTABLISHMENT ACCEPT from the second UE, which means the unicast link between the first and second UE is established.
  • FIG. 6 is a flow chart illustrating an exemplary unicast establishment procedure according to some yet other embodiments of the present application. Similar to the embodiments shown in FIG. 5, in embodiments shown in FIG. 6 or the like, the second message is also transmitted in the broadcast mode, while different broadcast destination ID is used.
  • a first UE proposing desires for unicast connection establishment may broadcast a first message for initiating a unicast establishment procedure.
  • the first message is a DCR message, e.g., DIRECT LINK ESTABLISHMENT REQUEST.
  • the destination layer-2 ID of the first message is a broadcast destination layer-2 ID known by other UEs to receive the broadcast information.
  • the first message is broadcast with a preconfigured, configured or stored broadcast destination layer-2 ID in the first UE.
  • the first UE will not generate the first layer-2 ID for PC5-S message (s) transmitted by other SL UE (s) to setup security or in response to the first message.
  • no first layer-2 ID is included in the first message, and the first message can be transmitted by the first UE as legacy.
  • a second UE When another SL UE, e.g., a second UE (also referred to as "a destination UE” or “a target UE” etc. ) receives the first message, it may determine to setup security with the first UE or make a response to the first message in step 603.
  • the second UE e.g., V2X layer of the second UE may assign a new layer-2 ID as a layer-2 ID of the second UE for unicast communication with the first UE.
  • the second UE will include the layer-2 ID of the second UE in the second message, rather than directly using it as the source layer-ID for transmitting the second message.
  • the second message in response to the first message it may be a message associated with security, e.g., DIRECT LINK AUTHENTICATION REQUEST or DIRECT LINK SECURITY MODE COMMAND, or another response message.
  • the second UE will transmit the second message in the broadcast mode with a broadcast destination ID in step 605.
  • the broadcast destination ID for broadcasting the second message is the layer-2 ID of the first UE.
  • the first UE will add its own layer-2 ID into a destination layer-2 ID list for broadcast reception.
  • MAC layer of the first UE will filter the MAC PDU according to the layer-2 ID of the first UE in step 607. Accordingly, MAC PDU associated with the second message will not be dropped in MAC layer, and will be passed to higher layer of the first UE.
  • MAC layer of the first UE may filter the MAC PDU according to the layer-2 ID of the first UE as stated above for broadcast, which is specified in TS 38.321.
  • MAC layer of the first UE may filter the MAC PDU in other manners, which does not affect the substance of the present application.
  • V2X layer of the first UE will obtain the layer-2 ID of the second UE included in the second message and pass it to AS layer of the first UE for future message transmission to and reception from the second UE. Accordingly, the layer-2 ID of the second UE can be used as destination ID or source ID during the following unicast establishment procedure as legacy.
  • the layer-2 ID of the second UE can be used as a destination layer-2 ID for transmitting further message (s) to the second UE in step 609, e.g., transmitting DIRECT LINK AUTHENTICATION RESPONSE in response to DIRECT LINK AUTHENTICATION REQUEST, or transmitting DIRECT LINK SECURITY MODE COMPLETE in response to DIRECT LINK SECURITY MODE COMMAND.
  • the layer-2 ID of The second UE can also use as the source layer-2 ID by the first UE for receiving other message (s) from the second UE in step 611, e.g., receiving DIRECT LINK ESTABLISHMENT ACCEPT from the second UE, which means the unicast link between the first and second UE is established.
  • FIG. 7 is a flow chart illustrating an exemplary unicast establishment procedure according to some yet other embodiments of the present application. Similar to the embodiments shown in FIG. 4, in embodiments shown in FIG. 7 or the like, the layer-2 ID of the second UE will be included in the second message during the unicast establishment procedure, so that other messages after the second message, e.g., DIRECT LINK AUTHENTICATION RESPONSE or DIRECT LINK SECURITY MODE COMPLETE etc., are transmitted in the unicast mode. However, the second message itself will be transmitted to the first UE in the broadcast mode rather than the unicast mode.
  • the layer-2 ID of the second UE will be included in the second message during the unicast establishment procedure, so that other messages after the second message, e.g., DIRECT LINK AUTHENTICATION RESPONSE or DIRECT LINK SECURITY MODE COMPLETE etc.
  • a first UE proposing desires for unicast connection establishment may broadcast a first message for initiating a unicast establishment procedure.
  • the first message is DIRECT LINK ESTABLISHMENT REQUEST message, i.e., a DCR message.
  • the destination layer-2 ID of the first message is a default broadcast destination layer-2 ID, which is known by other UEs to receive the broadcast information.
  • the first message is broadcast with a preconfigured, configured or stored broadcast destination layer-2 ID in the first UE.
  • the first UE will not generate the first layer-2 ID for PC5-S message (s) transmitted by other SL UE (s) to setup security or in response to the first message.
  • no first layer-2 ID is included in the first message, and the first message can be transmitted by the first UE as legacy.
  • a second UE When another SL UE, e.g., a second UE (also referred to as "a destination UE” or “a target UE” etc. ) receives the first message, it may determine to setup security with the first UE or make a response to the first message in step 703. For the second message in response to the first message, it may be a message associated with security, e.g., DIRECT LINK AUTHENTICATION REQUEST or DIRECT LINK SECURITY MODE COMMAND, or another response message.
  • security e.g., DIRECT LINK AUTHENTICATION REQUEST or DIRECT LINK SECURITY MODE COMMAND
  • the second UE e.g., V2X layer of the second UE may assign a new layer-2 ID as a layer-2 ID of the second UE for unicast communication with the first UE.
  • the second UE will include the layer-2 ID of the second UE in the second message, rather than directly using it as the source layer-ID for transmitting the second message.
  • the second UE will transmit the second message in the broadcast mode with a broadcast destination ID in step 705.
  • the broadcast destination ID for broadcasting the second message may be the same as or different from that for broadcasting the first message (i.e., the first broadcast destination ID) , but is also known by the first UE.
  • the broadcast destination ID for broadcasting the second message may be a preconfigured, configured or stored broadcast destination layer-2 ID in the first UE.
  • MAC layer of the first UE After receiving the second message, MAC layer of the first UE will filter the MAC PDU according to the second broadcast destination ID known by the first UE in step 707. Accordingly, MAC PDU associated with the second message will not be dropped in MAC layer, and will be passed to higher layer of the first UE. For example, MAC layer of the first UE may filter the MAC PDU according to the second broadcast destination ID as stated above for broadcast, which is specified in TS 38. 321. Similarly, as the specification evolves, MAC layer of the first UE may filter the MAC PDU in other manners, which does not affect the substance of the present application.
  • V2X layer of the first UE will obtain the layer-2 ID of the second UE included in the second message and pass it to AS layer of the first UE for future message transmission to and reception from the second UE. Accordingly, the layer-2 ID of the second UE can be used as destination ID or source ID during the following unicast establishment procedure as legacy.
  • the first UE may use the layer-2 ID of the second UE as a destination layer-2 ID for transmitting further message (s) to the second UE in step 709, e.g., transmitting DIRECT LINK AUTHENTICATION RESPONSE in response to DIRECT LINK AUTHENTICATION REQUEST, or transmitting DIRECT LINK SECURITY MODE COMPLETE in response to DIRECT LINK SECURITY MODE COMMAND.
  • the layer-2 ID of the second UE may also be used as the source layer-2 ID by the first UE for receiving other message (s) from the second UE in step 711, e.g., receiving DIRECT LINK ESTABLISHMENT ACCEPT from the second UE, which means the unicast link between the first and second UE is established.
  • FIG. 8 is a flow chart illustrating an exemplary unicast establishment procedure according to some embodiments of the present application. Similar to the embodiments shown in FIG. 4, in embodiments shown in FIG. 8 or the like, the second message during the unicast establishment procedure will also be transmitted in the unicast mode. The layer-2 ID of the second UE will be included in the second message, so that other messages after the second message, e.g., DIRECT LINK AUTHENTICATION RESPONSE or DIRECT LINK SECURITY MODE COMPLETE etc., are transmitted in the unicast mode.
  • DIRECT LINK AUTHENTICATION RESPONSE or DIRECT LINK SECURITY MODE COMPLETE etc.
  • a first UE proposing desires for unicast connection establishment may broadcast a first message for initiating a unicast establishment procedure.
  • the first message is a DCR message, e.g., DIRECT LINK ESTABLISHMENT REQUEST.
  • the destination layer-2 ID of the first message is a broadcast destination layer-2 ID known by other UEs to receive the broadcast information.
  • the first message is broadcast with a preconfigured, configured or stored broadcast destination layer-2 ID in the first UE.
  • the first UE will not generate the first layer-2 ID for PC5-S message (s) transmitted by other SL UE (s) to setup security or in response to the first message.
  • no first layer-2 ID is included in the first message, and the first message can be transmitted by the first UE as legacy.
  • a second UE When another SL UE, e.g., a second UE (also referred to as "a destination UE” or “a target UE” etc. ) receives the first message, it may determine to setup security with the first UE or make a response to the first message in step 803.
  • the second UE e.g., V2X layer of the second UE may assign a new layer-2 ID as a layer-2 ID of the second UE for unicast communication with the first UE.
  • the second UE will include the layer-2 ID of the second UE in the second message, rather than directly using it as the source layer-ID for transmitting the second message in response to the first message.
  • the second message it may be a message associated with security, e.g., DIRECT LINK AUTHENTICATION REQUEST or DIRECT LINK SECURITY MODE COMMAND, or another response message.
  • the second UE will transmit the second message to the first UE in the unicast mode, that is, the second message is a unicast message.
  • the layer-2 ID of the first UE is used as both the source ID and destination ID for transmitting the second message.
  • MAC layer of the first UE After receiving the second message in the first UE, MAC layer of the first UE will filter the MAC PDU according to the layer-2 ID of the first UE in step 807. Accordingly, MAC PDU associated with the second message will not be dropped in MAC layer, and will be passed to higher layer of the first UE. For example, MAC layer of the first UE may filter the MAC PDU according to layer-2 ID as stated above for unicast, which is specified in TS 38.321. As the specification evolves, MAC layer of the first UE may filter the MAC PDU in other manners, which does not affect the substance of the present application.
  • V2X layer of the first UE will obtain the layer-2 ID of the second UE included in the second message and pass it to AS layer of the first UE for future message transmission to and reception from the second UE. Accordingly, the layer-2 ID of the second UE may be used as destination ID or source ID during the following unicast establishment procedure as legacy.
  • the layer-2 ID of the second UE may be used by the first UE as a destination layer-2 ID for transmitting further message (s) to the second UE in step 809, e.g., transmitting DIRECT LINK AUTHENTICATION RESPONSE in response to DIRECT LINK AUTHENTICATION REQUEST, or transmitting DIRECT LINK SECURITY MODE COMPLETE in response to DIRECT LINK SECURITY MODE COMMAND.
  • the layer-2 ID of the second UE may also use as the source layer-2 ID by the first UE for receiving other message (s) from the second UE in step 811, e.g., receiving DIRECT LINK ESTABLISHMENT ACCEPT from the second UE, which means the unicast link between the first and second UE is established.
  • some embodiments of the present application also provide an apparatus of unicast establishment.
  • FIG. 9 illustrates a block diagram of an apparatus of unicast establishment 900 according to some embodiments of the present application.
  • the apparatus 900 may include at least one non-transitory computer-readable medium 901, at least one receiving circuitry 902, at least one transmitting circuitry 904, and at least one processor 906 coupled to the non-transitory computer-readable medium 901, the receiving circuitry 902 and the transmitting circuitry 904.
  • the at least one processor 906 may be a CPU, a DSP, a microprocessor etc.
  • the apparatus 900 may be a source UE or target UE configured to perform a method illustrated in the above or the like.
  • the at least one processor 906, transmitting circuitry 904, and receiving circuitry 902 are described in the singular, the plural is contemplated unless a limitation to the singular is explicitly stated.
  • the receiving circuitry 902 and the transmitting circuitry 904 can be combined into a single device, such as a transceiver.
  • the apparatus 900 may further include an input device, a memory, and/or other components.
  • the non-transitory computer-readable medium 901 may have stored thereon computer-executable instructions to cause a processor to implement the method with respect to the source UE as described above.
  • the computer-executable instructions when executed, cause the processor 906 interacting with receiving circuitry 902 and transmitting circuitry 904, so as to perform the steps with respect to the source UE as depicted above.
  • the non-transitory computer-readable medium 901 may have stored thereon computer-executable instructions to cause a processor to implement the method with respect to the target UE as described above.
  • the computer-executable instructions when executed, cause the processor 906 interacting with receiving circuitry 902 and transmitting circuitry 904, so as to perform the steps with respect to the target UE as illustrated above.
  • FIG. 10 is a block diagram of an apparatus of unicast establishment according to some other embodiments of the present application.
  • the apparatus 1000 for example a master node or a slave node may include at least one processor 1002 and at least one transceiver 1004 coupled to the at least one processor 1002.
  • the transceiver 1004 may include at least one separate receiving circuitry 1006 and transmitting circuitry 1008, or at least one integrated receiving circuitry 1006 and transmitting circuitry 1008.
  • the at least one processor 1002 may be a CPU, a DSP, a microprocessor etc.
  • the processor when the apparatus 1000 is a source UE, the processor is configured to: broadcast, via the at least one transmitting circuitry, a first message for initiating a unicast establishment procedure from the source UE; and receive, via the at least one receiving circuitry, a second message with an ID known by the source UE in response to the first message from a target UE.
  • the processor when the apparatus 1000 is a target UE, the processor may be configured to: receive, via the at least one receiving circuitry, a first message for initiating a unicast establishment procedure from a source UE; and transmit, via the at least one transmitting circuitry, a second message with an ID known by the source UE in response to the first message, to the source UE.
  • the method according to embodiments of the present application can also be implemented on a programmed processor.
  • the controllers, flowcharts, and modules may also be implemented on a general purpose or special purpose computer, a programmed microprocessor or microcontroller and peripheral integrated circuit elements, an integrated circuit, a hardware electronic or logic circuit such as a discrete element circuit, a programmable logic device, or the like.
  • any device on which resides a finite state machine capable of implementing the flowcharts shown in the figures may be used to implement the processor functions of this application.
  • an embodiment of the present application provides an apparatus, including a processor and a memory. Computer programmable instructions for implementing a method are stored in the memory, and the processor is configured to perform the computer programmable instructions to implement the method.
  • the method may be a method as stated above or other method according to an embodiment of the present application.
  • An alternative embodiment preferably implements the methods according to embodiments of the present application in a non-transitory, computer-readable storage medium storing computer programmable instructions.
  • the instructions are preferably executed by computer-executable components preferably integrated with a network security system.
  • the non-transitory, computer-readable storage medium may be stored on any suitable computer readable media such as RAMs, ROMs, flash memory, EEPROMs, optical storage devices (CD or DVD) , hard drives, floppy drives, or any suitable device.
  • the computer-executable component is preferably a processor but the instructions may alternatively or additionally be executed by any suitable dedicated hardware device.
  • an embodiment of the present application provides a non-transitory, computer-readable storage medium having computer programmable instructions stored therein.
  • the computer programmable instructions are configured to implement a method as stated above or other method according to an embodiment of the present application.
  • the terms “includes, “ “including, “ or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
  • An element proceeded by “a, “ “an, “ or the like does not, without more constraints, preclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element.
  • the term “another” is defined as at least a second or more.
  • the terms “having, “ and the like, as used herein, are defined as “including. "

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  • Computer Networks & Wireless Communication (AREA)
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  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne, selon des modes de réalisation, un procédé et un appareil d'établissement de monodiffusion. Un équipement utilisateur donné à titre d'exemple comprend : au moins un circuit de réception; au moins un circuit de transmission; et au moins un processeur couplé à au moins un circuit de réception et à au moins un circuit de transmission, au moins un processeur étant configuré pour : diffuser, via au moins un circuit de transmission, un premier message pour lancer une procédure d'établissement de monodiffusion à partir de l'équipement utilisateur; et recevoir, via au moins un circuit de réception, un second message avec un identifiant connu par l'équipement utilisateur en réponse au premier message provenant d'un second équipement utilisateur.
PCT/CN2021/135359 2021-12-03 2021-12-03 Procédé et appareil d'établissement de monodiffusion WO2023097660A1 (fr)

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Citations (4)

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Publication number Priority date Publication date Assignee Title
WO2020197298A1 (fr) * 2019-03-26 2020-10-01 Samsung Electronics Co., Ltd. Procédé et appareil permettant d'initier une connexion de commande de ressource radio (rrc) pour une communication de véhicule à tout (v2x)
CN112106440A (zh) * 2018-05-08 2020-12-18 Lg电子株式会社 用于在无线通信系统中传输v2x数据的方法及其设备
CN112804756A (zh) * 2019-11-13 2021-05-14 华硕电脑股份有限公司 无线通信系统中请求侧链路传送资源的方法和设备
CN113261381A (zh) * 2019-01-11 2021-08-13 高通股份有限公司 设备到设备信令

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112106440A (zh) * 2018-05-08 2020-12-18 Lg电子株式会社 用于在无线通信系统中传输v2x数据的方法及其设备
CN113261381A (zh) * 2019-01-11 2021-08-13 高通股份有限公司 设备到设备信令
WO2020197298A1 (fr) * 2019-03-26 2020-10-01 Samsung Electronics Co., Ltd. Procédé et appareil permettant d'initier une connexion de commande de ressource radio (rrc) pour une communication de véhicule à tout (v2x)
CN112804756A (zh) * 2019-11-13 2021-05-14 华硕电脑股份有限公司 无线通信系统中请求侧链路传送资源的方法和设备

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