WO2016156988A1 - Procédé de découverte et de mise à jour d'un équipement utilisateur relais entre un ue et un réseau - Google Patents

Procédé de découverte et de mise à jour d'un équipement utilisateur relais entre un ue et un réseau Download PDF

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Publication number
WO2016156988A1
WO2016156988A1 PCT/IB2016/000521 IB2016000521W WO2016156988A1 WO 2016156988 A1 WO2016156988 A1 WO 2016156988A1 IB 2016000521 W IB2016000521 W IB 2016000521W WO 2016156988 A1 WO2016156988 A1 WO 2016156988A1
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WO
WIPO (PCT)
Prior art keywords
user equipment
relay
network
message
announcing
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Application number
PCT/IB2016/000521
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English (en)
Inventor
Dong Li
Yun DENG
Yong Liu
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Alcatel Lucent
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Publication date
Application filed by Alcatel Lucent filed Critical Alcatel Lucent
Publication of WO2016156988A1 publication Critical patent/WO2016156988A1/fr

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Classifications

    • 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
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
    • 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
    • H04W40/00—Communication routing or communication path finding
    • H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
    • H04W40/246—Connectivity information discovery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
    • H04W40/248—Connectivity information update
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user

Definitions

  • the present disclosure relates to wireless communication technology, and specifically relates to a method, in a first user equipment of a wireless communication system, for discovering and updating a UE-to-network relay user equipment and a method, in a second user equipment of the wireless communication system, for facilitating discovering and updating the UE-to-network relay user equipment, wherein the first user equipment is located outside a coverage of the wireless communication network and at least one second user equipment is located within the coverage of the wireless communication network.
  • a user equipment to network (UE-to-Network) relay is an important topic in a long-term evolution (LTE) system version 13.
  • the UE-to-Network relay is mainly used to connect a remote user equipment (remote UE) outside a coverage of the network to a cellular network, such that the remote UE can communicate with a relevant part in the network (e.g., a rescue control center). This is particularly important for some disaster rescue scenarios, e.g., in a public security application where some user equipments are outside the network coverage while some user equipments are within the network coverage.
  • the first step is to discover such a UE that has capability of acting as a UE-to-network relay UE, and additionally, the UE-to-network relay UE discovery solution should consider mobility of the relay UE and the remote UE, thereby supporting service continuity.
  • the present disclosure aims to provide a solution for discovering the UE-to-network relay UE, which focuses on supporting prompt relay reselection for service continuity.
  • a first aspect of the present disclosure provides a method, in a first user equipment of a wireless communication system, for discovering and updating a UE-to-network relay UE, the method comprising:
  • the method according to the present disclosure achieves rapid selection and reselection of a UE-to-network relay UE with mobility taken into consideration, which enhances continuity of the UE-to-network communication.
  • the first user equipment is located outside the coverage of the wireless communication network and has a capability of device-to-device direct discovery and communication
  • the at least one second user equipment is located within the coverage of the wireless communication network and has a UE-to-network relay function, wherein the wireless communication network is a cellular network.
  • the solicitation message comprises at least one of the following information: [0015] - link layer address of the first user equipment; and
  • the response message comprises at least one of the following information:
  • criteria for selecting, by the first user equipment, a second user equipment from the list of UE-to-network relay UEs as the UE-to-network relay UE of the first user equipment includes:
  • relay state information carried in a relay UE discovery response message indicates that relay UE selection appropriation of the second user equipment is highest.
  • relay UE refers to the UE-to-network relay UE for short, and the two terms are consistent in meaning.
  • the method further comprises:
  • first announcing message or the second announcing message disclosed here should be understood as a UE-to-network relay UE discovery announcing message.
  • the first announcing message and/or the at least one second announcing message incudes a relay state flag and/or at least one of the following information: link layer address of the relay UE, relay state information, network and/or connection information.
  • a first state of the relay state flag indicates that the associated second user equipment is a current UE-to-network relay of the first user equipment
  • a second state of the relay state flag indicates that the associated second user equipment is a candidate UE-to-network relay UE of the first user equipment.
  • the relay state flag bit being 1 indicates that the associated second user equipment is a current UE-to-network relay of the first user equipment
  • the relay state flag being 0 indicates that the associated second user equipment is a candidate UE-to-network relay user equipment of the first user equipment; or vice versa, where the relay state flag being 0 indicates a current relay UE, while 1 indicates a candidate relay UE.
  • the first user and the second user should reach a consensus which configuration is used. Without loss of generality, in the description below, it is assumed to the former configuration (i.e. 1 indicates the current relay UE, while 0 indicates a candidate relay UE).
  • the first announcing message includes identification information of at least one first user equipment to which the relay service is provided by the second user equipment as the UE-to-network relay UE of the first user equipment or a number of the at least one first user equipment to which the relay service is provided, and/or other second user equipments set the relay state flags in the second announcing messages to the second state when the other second user equipments receive the first announcing message from the second user equipment as the UE-to-network relay UE of the first user equipment.
  • criteria for reselecting, according to the updated list of the UE-to-network relay UEs, a second UE as the updated UE-to-network relay UE of the first user equipment include:
  • an average signal power of the currently selected relay UE as detected by the first user equipment is lower than a second threshold for relay UE selection, and there is another second user equipment in the list of relay UEs whose transmit signal average power is higher than the first threshold for relay UE selection; or there is another second user equipment in the list of relay UEs whose transmit signal average power is higher than the first threshold for relay UE selection and the difference between the transmit signal average power of the another second user equipment and the average signal power of the currently selected relay UE is greater than a third threshold for relay UE selection.
  • transmitting manner of the solicitation message is multicast or broadcast
  • transmitting manner of the response message is unicast, multicast or broadcast
  • transmitting manner of the first announcing message and/or the second announcing is multicast or broadcast.
  • a second aspect according to the present disclosure further provides a method, in a second user equipment of a wireless communication system, for facilitating discovering and updating a UE-to-network relay user equipment, the method comprising:
  • [0037] - transmitting a first announcing message or a second announcing message according to whether the second user equipment is a UE-to-network relay of the first user equipment, wherein the first announcing message and/or the at least one second announcing message includes a relay state flag and/or at least one of the following information: link layer address of the relay UE, relay state information, and network and/or connection information,
  • the first user equipment is located outside coverage of the wireless communication network and the at least one second user equipment is located within the coverage of the wireless communication network.
  • a first state of the relay state flag bit indicates that the associated second user equipment is a current UE-to-network relay of the first user equipment, and wherein a second state of the relay state flag indicates that the associated second user equipment is a candidate UE-to-network relay UE of the first user equipment.
  • the relay state flag being 1 indicates that the associated second user equipment is a current UE-to-network relay of the first user equipment
  • the relay state flag being 0 indicates that the associated second user equipment is a candidate UE-to-network relay user equipment of the first user equipment; or vice versa, where the relay state flag being 0 indicates a current relay UE, while 1 indicates a candidate relay UE.
  • the first user and the second user should reach a consensus regarding which configuration is used. Without loss of generality, in the description below, it is assumed to the former configuration (i.e. 1 indicates the current relay UE, while 0 indicates a candidate relay UE).
  • the first announcing message includes identification information of at least one first user equipment to which the relay service is provided by the second user equipment as the UE-to-network relay UE of the first user equipment or a number of the at least one first user equipment to which the relay service is provided, and/or other second user equipments set the relay state flags in the second announcing messages to the second state when the other second user equipments receive the first announcing message from the second user equipment as the UE-to-network relay UE of the first user equipment.
  • transmitting manner of the solicitation message is multicast or broadcast
  • transmitting manner of the response message is unicast, multicast or broadcast
  • transmitting manner of the first announcing message and/or the second announcing is multicast or broadcast.
  • transmitting a first announcing message or a second announcing message according to whether the second user equipment is a UE-to-network relay of the first user equipment further comprises:
  • the method according to the present disclosure achieves rapid selection and reselection of a UE-to-network relay UE with mobility taken into consideration, which enhances continuity of the UE-to-network communication.
  • FIG. 1 shows a schematic diagram 100 of an application scenario of a method according to the present disclosure
  • FIG. 2 shows a flow diagram 200 of one embodiment of a method according to the present disclosure
  • FIG. 3 shows a flow diagram 300 of one embodiment of a method according to the present disclosure.
  • FIG. 4 shows a flow diagram 400 of a system implementing a method according to the present disclosure.
  • discovery of a UE-to-network relay UE can be implemented in two modes: mode A (announcing by the relay UE) and mode B (soliciting by a remote UE and responding by the relay UE).
  • mode A announcement by the relay UE
  • mode B siciting by a remote UE and responding by the relay UE.
  • the present disclosure provides a process for discovering a UE-to-network relay UE based on the above two modes, whose respective advantages are leveraged to achieve mobility support and service continuity in consideration of the UE-to-network relay.
  • the remote UE transmits a solicitation message for discovering the UE-to-network relay UE.
  • a D2D (device to device) UE located within the network coverage and having a relay competence will transmit a response message including relevant information (e.g., the relay UE link layer identifier, network/connection information, and relay state information, etc.) after receiving the request message. Transmission of the response message can be performed in a multicast manner or in a one-to-one manner.
  • the remote UE when receiving the response message from the UE-to-network relay, it will maintain a list of candidate UE-to-network relay UEs, the list containing relevant information about the relay UEs (e.g., power capacity margin, serving time and so on). The remote UE will select a most appropriate one as its UE-to-network relay. Then, the remote UE performs a one-to-one direct communication with the selected UE-to-network relay through an implicit or explicit acknowledgement to the selection of the UE-to-Network relay UE.
  • relevant information about the relay UEs e.g., power capacity margin, serving time and so on.
  • the remote UE will select a most appropriate one as its UE-to-network relay. Then, the remote UE performs a one-to-one direct communication with the selected UE-to-network relay through an implicit or explicit acknowledgement to the selection of the UE-to-Network relay UE.
  • the selected UE-to-network relay will also broadcast an announcing message indicating its role as a UE-to-network relay UE. It is assumed that some other D2D UEs in the network which also have a capability of acting as a UE-to-network relay UE receive the announcing message and they are aware of presence of a UE-to-network relay in its proximity which can relay data of some remote UEs. In this case, they will set themselves to be candidate UE-to-network relays for these remote UEs (due to mobility of the remote UEs and/or current relay UE).
  • these UEs can also broadcast announcing messages indicating presence of the potential UE-to-network relay UEs.
  • one information element or referred to as a relay state flag, annotated as activeRelay
  • activeRelay one information element in the announcing message is appointed for differentiating the current UE-to-network relay UE from the candidate UE-to-network relay UEs).
  • the information element activeRelay is set to a first state in the announcing message, while for those UEs in the network which have the UE-to-network relay competence and have detected the announcing message with activeRelay set to the first state, the information element activeRelay in their announcing messages is set to a second state.
  • the purpose of such setting is to avoid restriction of the message transmission within a limited region surrounding the relay UE selected by the remote UE, thereby avoiding flooding transmission of the announcing messages.
  • Fig. 1 shows a schematic diagram 100 of an application scenario of a method according to the present disclosure. It may be seen from the figure that there exists a user equipment UE-1 (11 1), a user equipment UE-2 (1 12), a user equipment UE-3 (113), a user equipment UE-4 (1 14) and a user equipment UE-5 (115) within coverage of the cellular network. Besides, it can also be seen from the figure that Uu interfaces exist between the user equipment UE- 1 (111) and a base station 130 and between the user equipment UE-3 (113) and the base station 130, while PC5 interfaces exist between the user equipment UE1 (111) and a remote user equipment 120 and between the user equipment UE-3 (113) and the remote user equipment 120.
  • Uu interfaces exist between the user equipment UE- 1 (111) and a base station 130 and between the user equipment UE-3 (113) and the base station 130
  • PC5 interfaces exist between the user equipment UE1 (111) and a remote user equipment 120 and between the user
  • the remote user equipment 120 establishes a communication connection with the user equipment UE- 1 (111) so as to perform important communications such as those involving public security with some parts of the cellular network, while with mobility of the remote user equipment 120 and possible mobility of the user equipment UE- 1 (111), the user equipment UE-2 (1 12), the user equipment UE-3 (113), the user equipment UE-4 (114), and the user equipment UE-5 (115), if the communication will be more reliable if the remote user equipment 120 selects the user equipment UE-3 (113), for example, as the relay user equipment, the remote user equipment may update the relay list and correspondingly select the user equipment UE-3 (1 13) as the relay user equipment.
  • the remote user equipment selects a user equipment within the network coverage as its relay user equipment so as to implement the UE-to-network communication and how the remote user equipment updates and reselects a more appropriate user equipment as its relay user equipment when channel quality changes so as to implement the UE-to-network communication.
  • Fig. 2 shows a flow diagram 200 of one embodiment of a method according to the present disclosure. It can be seen from the figure that a method 200, in a first user equipment of a wireless communication system, for discovering and updating a UE-to-network relay UE comprises steps below:
  • step 210 the first user equipment transmits a solicitation message to look for a UE-to-network relay UE.
  • the first user equipment receives at least one response message from at least one second user equipment that receives the solicitation message.
  • step 230 the first user equipment establishes a list of UE-to-network relay UEs according to the at least one response message.
  • the first user equipment selects a second user equipment from the list of UE-to-network relay UEs as a UE-to-network relay UE of the first user equipment and communicates with the second user equipment.
  • the method according to the present disclosure achieves rapid selection and reselection of a UE-to-network relay UE with mobility taken into consideration, which enhances continuity of the UE-to-network communication.
  • the first user equipment is located outside the coverage of the wireless communication network and has a capability of device-to-device direct discovery and communication
  • the at least one second user equipment is located within the coverage of the wireless communication network and has a UE-to-network relay function, wherein the wireless communication network is a cellular network.
  • the solicitation message comprises at least one of the following information:
  • the response message comprises at least one of the following information:
  • criteria for selecting, by the first user equipment, the second user equipment from the list of UE-to-network relay UEs as the UE-to-network relay UE of the first user equipment include:
  • the average receive signal power of the second user equipment is highest, exceeding a predetermined first threshold for relay UE selection, and/or
  • the relay state information carried in the relay UE discovery response message indicates that the relay UE selection appropriation of the second user equipment is highest.
  • the method further comprises the following steps:
  • the first announcing message and/or the at least one second announcing message incudes a relay state flag and/or at least one of the following information: a link layer address of the relay UE, relay state information, network and/or connection information.
  • a first state of the relay state flag indicates that the associated second user equipment is a current UE-to-network relay of the first user equipment
  • a second state of the relay state flag indicates that the associated second user equipment is a candidate UE-to-network relay UE of the first user equipment.
  • the first announcing message includes identification information of at least one first user equipment to which the relay service is provided by the second user equipment as the UE-to-network relay UE of the first user equipment or a number of the at least one first user equipment to which the relay service is provided, and/or other second user equipments set the relay state flags in the second announcing messages to the second state when the other second user equipments receive the first announcing message from the second user equipment as the UE-to-network relay UE of the first user equipment.
  • the first announcing message includes an address of at least one first user equipment to which a relay service is provided by the second user equipment as the UE-to-network relay UE of the first user equipment, and/or other second user equipments set the relay state flags in the second announcing messages to 0 when the other second user equipments receive the first announcing message from the second user equipment as the UE-to-network relay UE of the first user equipment; or vice versa, where the relay state flag being 0 indicates the current relay UE, while 1 indicates the candidate relay UE.
  • the first user and the second user should reach a consensus regarding which configuration is used. Without loss of generality, in the description below, it is assumed to the former configuration (i.e. 1 indicates the current relay UE, while 0 indicates a candidate relay UE).
  • criteria for reselecting, according to the updated list of the UE-to-network relay UEs, a second UE as an updated UE-to-network relay UE of the first user equipment include:
  • an average signal power of the currently selected relay UE as detected by the first user equipment is lower than a second threshold for relay UE selection, and there is another second user equipment in the list of relay UEs whose transmit signal average power is higher than the first threshold for relay UE selection; or there is another second user equipment in the list of relay UEs whose transmit signal average power is higher than the first threshold for relay UE selection and the difference between the transmit signal average power of the another second user equipment and the average signal power of the currently selected relay UE is greater than a third threshold for relay UE selection.
  • transmitting manner of the solicitation message is multicast or broadcast
  • transmitting manner of the response message is unicast, multicast or broadcast
  • transmitting manner of the first announcing message and/or the second announcing message is multicast or broadcast.
  • Fig. 3 shows a flow diagram 300 of one embodiment of a method according to the present disclosure. It can be seen from Fig. 3 that a method 300, in a second user equipment of a wireless communication system, for facilitating discovering and updating a UE-to-network relay user equipment comprises: [0087] First, in step 310, the second user equipment receives a solicitation message from a first user equipment outside coverage of the wireless communication network and transmits a response message to the first user equipment in response to the solicitation message.
  • the second user equipment transmits a first announcing message or a second announcing message according to whether the second user equipment is a UE-to-network relay of the first user equipment, wherein the first announcing message and/or the at least one second announcing message includes a relay state flag and/or at least one of the following information: link layer address of the relay UE, relay state information, and network and/or connection information,
  • the first user equipment is located outside the coverage of the wireless communication network and the at least one second user equipment is located within the coverage of the wireless communication network.
  • a first state of the relay state flag indicates that the associated second user equipment is a current UE-to-network relay of the first user equipment
  • a second state of the relay state flag indicates that the associated second user equipment is a candidate UE-to-network relay UE of the first user equipment.
  • the relay state flag being 1 indicates that the associated second user equipment is a current UE-to-network relay of the first user equipment
  • the relay state flag being 0 indicates that the associated second user equipment is a candidate UE-to-network relay user equipment of the first user equipment; or vice versa, where the relay state flag being 0 indicates a current relay UE, while 1 indicates a candidate relay UE.
  • the first user and the second user should reach a consensus regarding which configuration is used. Without loss of generality, in the description below, it is assumed to the former configuration (i.e. 1 indicates the current relay UE, while 0 indicates a candidate relay UE).
  • the first announcing message includes identification information of at least one first user equipment to which the relay service is provided by the second user equipment as the UE-to-network relay UE of the first user equipment or a number of the at least one first user equipment to which the relay service is provided, and/or other second user equipments set the relay state flags in the second announcing messages to the second state when the other second user equipments receive the first announcing message from the second user equipment as the UE-to-network relay UE of the first user equipment.
  • first state described above can be 1 and correspondingly, the second state can be 0; or vice versa, where the first state can be 0 and correspondingly the second state can be 1.
  • transmitting manner of the solicitation message is multicast or broadcast
  • transmitting manner of the response message is unicast, multicast or broadcast
  • transmitting manner of the first announcing message and/or the second announcing message is multicast or broadcast.
  • transmitting a first announcing message or a second announcing message according to whether the second user equipment is a UE-to-network relay of the first user equipment further comprises:
  • Fig. 4 shows a system flow diagram 400 for implementing a method according to the present disclosure.
  • user equipments within the cellular network and outside the cellular network are distributed as previously shown in Fig. 1, where a user equipment located outside the network coverage is referred to as a remote user equipment and the user equipments located within the network coverage include UE- 1, UE-2, UE-3, UE-4 and UE-5, and it is supposed that all user equipments have a UE-to-network relay capability.
  • the process of UE-to-network relay UE discovery and reselection can be described by virtue of the system flow diagram below.
  • a remote UE outside the network coverage first detects, in step 410, that it is located outside the network coverage but needs to communicate with some parts within a network coverage of a rescue control center, for example, due to needs of some aspects (not shown). Then, in next step 420, the remote UE 120 queries, by transmitting a solicitation message, whether a UE-to-network relay within the network coverage exists at its periphery.
  • the solicitation message can be transmitted by broadcast or multicast.
  • the solicitation message will be successfully received by relay-capable user equipments within the network coverage, for example (it is supposed the user equipment UE- 1, the user equipment UE-2 and the user equipment UE-3 in Fig.
  • the remote UE selects a UE-to-network relay UE.
  • UE- 1 is selected as the UE-to-network relay.
  • the remote UE establishes a list of candidate UE-to-network relay UEs based on the received response message.
  • the remote UE will perform a one-to-one direct communication with the selected UE-to-network relay so as to relay relevant data.
  • the relay decision made by the remote UE is implicitly or explicitly acknowledged in the direct communication.
  • the selected UE-to-network relay transmits an announcing message indicating a role of its UE-to-network relay UE.
  • an information element of a relay state flag activeRelay is introduced in the notification message for identifying whether the second user equipment is a currently serving relay UE, e.g., a first state of the activeRelay indicates that the associated user equipment is an incumbent UE-to-network relay.
  • step 470 it is supposed that other user equipments within the network coverage successfully receive the announcing message. In a scenario as shown in Fig.
  • the remote UE updates, based on the received announcing message, a set of candidate UE-to-network relay UEs.
  • the remote UE will reselect a UE-to-network relay.
  • the remote UE 120 selects the user equipment UE-3 to replace the user equipment UE- 1 to act as its UE-to-network relay.
  • the remote UE 120 performs a one-to-one direct communication with the reselected UE-to-network relay (i.e., UE-3) so as to relay its data.
  • the reselection decision made by the remote UE 120 here will be explicitly or implicitly acknowledged in the direction communication.
  • the method according to the present disclosure achieves rapid selection and reselection of the UE-to-network relay UE with mobility taken into consideration, which enhances continuity of the UE-to-network communication.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

La présente invention concerne un procédé, implémenté dans un premier équipement d'utilisateur d'un système de communication sans fil, pour découvrir et mettre à jour un UE relais UE/réseau. Dans le procédé, le premier équipement d'utilisateur : transmet un message de sollicitation pour rechercher un UE relais UE/réseau; reçoit au moins un message de réponse, d'au moins un second équipement d'utilisateur qui reçoit le message de sollicitation; établit une liste d'UE relais UE/réseau d'après le ou les messages de réponse; et sélectionne un second équipement d'utilisateur dans la liste d'UE relais UE/réseau en tant qu'un UE relais UE/réseau du premier équipement d'utilisateur, et communique avec celui-ci. L'invention concerne également un procédé pour faciliter la découverte et la mise à jour d'un UE relais. Les procédés selon la présente invention permettent de sélectionner et re-sélectionner rapidement un UE relais UE/réseau en tenant compte de la mobilité, et d'améliorer ainsi la continuité de la communication UE/réseau.
PCT/IB2016/000521 2015-04-03 2016-03-29 Procédé de découverte et de mise à jour d'un équipement utilisateur relais entre un ue et un réseau WO2016156988A1 (fr)

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CN201510158396.7A CN106162796A (zh) 2015-04-03 2015-04-03 用于发现和更新用户设备到网络的中继用户设备的方法
CN201510158396.7 2015-04-03

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WO2021203290A1 (fr) * 2020-04-08 2021-10-14 Qualcomm Incorporated Bassin de découverte pour liaison latérale
WO2023204427A1 (fr) * 2022-04-22 2023-10-26 삼성전자 주식회사 Procédé d'authentification de dispositif électronique et dispositif électronique associé

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CN108337671A (zh) 2018-01-30 2018-07-27 乐鑫信息科技（上海）有限公司 一种mesh网络内设备发现方法
EP3525517B1 (fr) * 2018-02-12 2020-12-16 Curvalux UK Limited Réseau à vitesse élevée à plusieurs bonds avec formation de faisceau
CN110611944A (zh) * 2018-06-15 2019-12-24 海信集团有限公司 一种重选Relay UE的方法和设备
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