WO2023206987A1 - 紧急呼叫方法、网络节点及存储介质 - Google Patents

紧急呼叫方法、网络节点及存储介质 Download PDF

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Publication number
WO2023206987A1
WO2023206987A1 PCT/CN2022/125951 CN2022125951W WO2023206987A1 WO 2023206987 A1 WO2023206987 A1 WO 2023206987A1 CN 2022125951 W CN2022125951 W CN 2022125951W WO 2023206987 A1 WO2023206987 A1 WO 2023206987A1
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Prior art keywords
emergency
node
relay
emergency call
network node
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PCT/CN2022/125951
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English (en)
French (fr)
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黎明雪
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中国电信股份有限公司
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Publication of WO2023206987A1 publication Critical patent/WO2023206987A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/90—Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
    • 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
    • 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
    • H04W76/00—Connection management
    • H04W76/50—Connection management for emergency connections

Definitions

  • the present disclosure relates to the field of communication technology, in particular to an emergency call method, network node and storage medium.
  • D2D Device-to-Device, device to device
  • ProSe Proximity based Services, proximity services.
  • U2N Relays UE to Network Relay, terminal to network relay
  • U2N Relay connects to the cellular network.
  • One object of the present disclosure is to improve the call success probability of emergency communications.
  • an emergency call method including: a network node obtains a relay discovery request from a remote node; when it is determined that the relay discovery request includes an emergency call identifier, if it is determined that If the network node meets the emergency call relay requirements of the remote node, it establishes a unicast communication connection with the remote node; the network node obtains the emergency communication service identifier and emergency communication target number from the remote node; the network node obtains the emergency communication service identifier according to the emergency communication service identifier and the emergency communication target number to send an emergency call request to the network side.
  • the relay discovery request also includes an emergency communication target number; determining that the emergency call relay requirements of the remote node are met includes: the network node determines that the emergency communication target number is in a pre-stored emergency number set and meets the emergency call relay requirements. If the relay node conditions are met, it is determined that the emergency call relay requirements of the remote node are met.
  • the emergency call identity and the emergency communication service identity are the same.
  • the method further includes: the network node establishes a connection with the 5G core network; and obtains and stores the emergency number set issued by the 5G network.
  • sending the emergency call request to the network side includes: the network node sends a service request with a service type of emergency service fallback to the AMF.
  • the method further includes: the network node serves as a relay node between the remote node and the 5G core network, and maintains the emergency communication call connection between the remote node and the 5G core network.
  • sending an emergency call request to the network side includes: the network node sends a service request with a service type of emergency service fallback to the AMF; the method also includes: the network node serves as a relay node between the remote node and the 5G core network , maintain the emergency communication call connection between the remote node and the 5G core network.
  • an emergency call method including: generating and sending a relay discovery request, where the relay discovery request includes an emergency call identifier; and receiving relay discovery feedback information from a network node. , establish a unicast communication connection with the network node, where the network node determines that the relay discovery request includes the emergency call identifier, and determines that the network node meets the emergency call relay requirements of the remote node, and the feedback is in progress.
  • the relay node feeds back information; sends the emergency communication service identifier and emergency communication target number to the network node, so that the network node can initiate an emergency call request to the network side.
  • the relay discovery request also includes the emergency communication target number; wherein the relay node determines that the emergency communication target number is in a pre-stored emergency number set and meets the conditions for being a relay node. Meets the emergency call relay requirements of remote nodes.
  • a network node including: a request acquisition unit configured to acquire a relay discovery request from a remote node; a connection establishment unit configured to determine the relay discovery request In the case where the emergency call identifier is included, if it is determined that the network node meets the emergency call relay requirements of the remote node, a unicast communication connection with the remote node is established; the information acquisition unit is coordinated to obtain the emergency call from the remote node.
  • the communication service identifier and the emergency communication target number; the call sending unit is configured to send an emergency call request to the network side according to the emergency communication service identifier and the emergency communication target number.
  • the relay discovery request also includes the emergency communication target number;
  • the connection establishment unit includes: a first judgment subunit configured to determine whether the relay discovery request includes the emergency call identifier; the second judgment subunit is It is configured to determine whether the emergency communication target number is in the pre-stored emergency number set and meets the conditions as a relay node when the relay discovery request includes an emergency call identifier; the connection establishment subunit is configured to determine whether the emergency communication target number is in the pre-stored emergency number set. If the communication target number is in the pre-stored emergency number set and meets the conditions for being a relay node, a unicast communication connection with the remote node is established.
  • the emergency call identity and the emergency communication service identity are the same.
  • the node further includes: a number set acquisition unit configured to establish a connection with the 5G core network, acquire the emergency number set issued by the 5G network, and store the emergency number set.
  • a number set acquisition unit configured to establish a connection with the 5G core network, acquire the emergency number set issued by the 5G network, and store the emergency number set.
  • the call sending unit is configured to send a service request with a service type of emergency service fallback to the AMF.
  • the node further includes: a communication maintenance unit configured to serve as a relay node between the remote node and the 5G core network, and maintain the emergency communication call connection between the remote node and the 5G core network.
  • a communication maintenance unit configured to serve as a relay node between the remote node and the 5G core network, and maintain the emergency communication call connection between the remote node and the 5G core network.
  • the call sending unit is configured to send a service request with a service type of emergency service fallback to the AMF;
  • the node also includes: a communication maintenance unit configured to serve as a relay node between the remote node and the 5G core network , maintain the emergency communication call connection between the remote node and the 5G core network.
  • a network node including: a request unit configured to generate and send a relay discovery request, where the relay discovery request includes an emergency call identifier; a connection unit configured to When the relay discovery feedback information is received, a unicast communication connection is established with the network node that sends the relay node feedback information, wherein the network node determines that the relay discovery request includes the emergency call identifier, and determines that the network node complies with the remote request.
  • the relay node feeds back information;
  • the information providing unit is configured to send the emergency communication service identifier and the emergency communication target number to the opposite end network node that establishes the unicast communication connection, so as to The end network node initiates an emergency call request to the network side.
  • a network node including: a memory; and a processor coupled to the memory, the processor being configured to perform any of the above methods based on instructions stored in the memory.
  • a non-transitory computer-readable storage medium on which are stored computer program instructions, which when executed by a processor, implement the steps of any of the above methods.
  • a computer program for causing a processor to execute any of the above emergency call methods.
  • Figure 1 is a flow chart of some embodiments of the emergency call method of the present disclosure.
  • Figure 2 is a flow chart of other embodiments of the emergency call method of the present disclosure.
  • Figure 3 is a signaling flow chart of some embodiments of the emergency call method of the present disclosure.
  • Figure 4 is a schematic diagram of some embodiments of network nodes of the present disclosure.
  • Figure 5 is a schematic diagram of some embodiments of a connection establishment unit in a network node of the present disclosure.
  • Figure 6 is a schematic diagram of other embodiments of network nodes of the present disclosure.
  • Figure 7 is a schematic diagram of further embodiments of network nodes of the present disclosure.
  • Figure 8 is a schematic diagram of further embodiments of network nodes of the present disclosure.
  • Nodes in the network can serve as relay nodes.
  • a remote node that is far away from the network side attempts to connect to the network, it can connect to the 5GC (5G core) through the interface between terminals and the terminal-network relay node. net).
  • FIG. 1 A flowchart of some embodiments of the emergency call method of the present disclosure is shown in Figure 1.
  • the network node obtains the relay discovery request from the remote node.
  • the network node is pre-registered with the 5G core network and receives the emergency number set issued by the 5G core network, and a PDU (Protocol Data Unit) session is established between the network node and the 5G core network.
  • PDU Protocol Data Unit
  • step 112 the network node parses the relay discovery request and determines whether it carries an emergency call identifier. If the emergency call identifier is carried, step 213 is executed; otherwise, the current relay discovery request is not initiated for an emergency call, and the relay discovery process in related technologies can be executed.
  • the network node determines whether it meets the emergency call relay requirements of the remote node.
  • the emergency call relay requirements may include whether to support the emergency call requirements required by the remote node, and may also include whether to support the relay service requirements required by the remote node.
  • the relay discovery request may also carry an emergency communication target number.
  • the network node matches the emergency communication target number with its own stored emergency number set. If the match is successful, the network node supports the remote node.
  • the required emergency call requirements are then determined whether the relay service requirements are met.
  • the judgment condition for meeting the relay service requirements can be any one of the related technologies.
  • whether the remote node can provide relay services can be determined based on one or more of the signal strength, signal quality, and resource status of the relay node itself of the received relay discovery request. .
  • step 114 is executed; otherwise, the relay discovery request is discarded, and the relay node discovery process for the current network node ends.
  • the network node establishes a Unicast communication connection with the remote node.
  • the network node can send relay discovery feedback information to the remote node to inform the remote node to establish a unicast communication connection.
  • the network node obtains the emergency communication service identifier and emergency communication target number from the remote node.
  • the emergency communication service identifier may be the same as the emergency call identifier in step 112 above.
  • the network node determines that the current call is an emergency call based on the received emergency communication service identifier, and then uses the emergency communication target number as the called number and sends an emergency call request to the network side.
  • the network node may send a service request with a service type of emergency service fallback (Emergency Service Fallback) to the AMF.
  • the network side transfers the emergency call request to the called party based on the processing method for emergency call requests in related technologies.
  • the network node can identify the emergency call requirement of the remote node in the relay discovery request, and then establish a device-to-device connection with the terminal if it can provide the corresponding relay service.
  • the connection of the device replaces the remote terminal in initiating an emergency call request to the network side, and serves as a relay between the remote terminal and the network side, so that the remote node can quickly and efficiently utilize the relay service to implement emergency calls and avoid the relay of the connection.
  • the failure of the emergency call due to the failure of the node to provide the emergency call service improves the success rate and efficiency of the emergency call.
  • the remote node In step 221, the remote node generates and sends a relay discovery request, and the relay discovery request includes the emergency call identifier.
  • the remote node when it finds that it is far away from an access point (such as a base station) that can provide access services, it may send a relay discovery request in order to find a network node that can provide relay services. .
  • the relay discovery request may be sent in the form of a broadcast.
  • the remote node when it needs to make an emergency call and is far away from an access point (such as a base station) that can provide access services, it can generate a relay discovery request and discover it through the relay.
  • the request carries the emergency call identifier.
  • the relay discovery request may also carry an emergency communication target number (such as 110, 119, etc.).
  • step 222 the remote node determines whether it has received relay discovery feedback information. If the relay discovery feedback information is received, step 223 is executed. Otherwise, wait to receive feedback information, or resend the relay discovery request.
  • the network node may determine whether the emergency call relay requirements of the remote node are met according to the method in the embodiment shown above. If it is determined that the emergency call relay requirements of the remote node are met, the network node may The remote node sends relay discovery feedback information.
  • the remote node establishes a unicast communication connection with the network node that provides relay discovery feedback information.
  • the remote node may select a network node to provide relay services according to a predetermined policy.
  • the predetermined strategy may include selection according to one or more of the priority of the network node, the quality of service that can be provided, or the degree of stability.
  • the remote node sends the emergency communication service identifier and emergency communication target number to the selected relay node through a unicast communication connection.
  • the network node when the network node needs to initiate an emergency call and it is difficult to directly connect to the access point, it can inform the network node that it needs to provide emergency call services during the relay node discovery process, thereby selecting the one that can provide the corresponding emergency call service.
  • the network node of the emergency call service serves as a relay node, and can quickly and efficiently utilize the relay service to implement emergency calls, improving the success rate and efficiency of emergency calls.
  • a network node capable of providing relay services (referred to as relay node 32 in the figure) is registered to the 5G network.
  • relay node 32 a network node capable of providing relay services
  • the emergency number set issued by the network is saved and a PDU session is established.
  • the remote node 31 when the remote node 31 (Remote UE) intends to initiate an emergency communication call (such as dialing 110), it searches for a suitable relay node through the 5G ProSe Discovery (proximity service discovery) process of model B.
  • the relay node discovery process can be initiated by bringing the emergency communication service identifier and the emergency communication target number in the Discovery Solicitation Message (discovery request message).
  • the relay node 32 receives the Discovery Solicitation Message, determines that it includes the emergency communication service identifier, and determines that the current request is a relay service request that needs to provide relay services.
  • the relay node determines that the emergency communication target number is in its saved emergency number list and determines that it meets the conditions for being a relay node for the remote node 31, execution 313 is triggered.
  • the relay node 32 returns the relay node feedback information to the remote node 31.
  • the remote node 31 and the relay node 32 establish a communication connection in unicast mode, and transmit the emergency communication service identifier and the emergency communication target number to the relay node 32.
  • the relay node 32 decides to initiate the emergency communication service to the 5G network on behalf of the remote node Remote UE, triggering execution 316.
  • the relay node 32 initiates a service request to the AMF 34, and the service type of the service request is emergency service fallback (Emergency Service Fallback).
  • emergency service fallback Emergency Service Fallback
  • AMF 34 returns an emergency request (N2 Request for emergency fallback) based on the N2 interface to NG-RAN (NG-Radio Access Network, 5G wireless access network).
  • N2 Request for emergency fallback NG-Radio Access Network, 5G wireless access network.
  • 5G Prose Direct Communication 5G proximity service direct communication
  • EPS Evolved Packet System, Evolved Packet System
  • fallback fallback
  • the 5G ProSe Direct Discovery process message and the information carried in the message are improved, so that the relay discovery initiated for the emergency call can be discovered as soon as possible; the relay node can first determine whether it can support For emergency call relay services, the reliability of relay node selection is improved.
  • the above-mentioned improvements to nodes that perform relay services are easily implemented through software upgrades, which is beneficial to improving deployment efficiency and promoting applications.
  • FIG. 4 A schematic diagram of some embodiments of the network node 40 of the present disclosure is shown in Figure 4.
  • the network node 40 can serve as a relay node to provide relay services for remote nodes.
  • the request acquisition unit 41 can acquire the relay discovery request from the remote node.
  • the connection establishment unit 42 can parse the relay discovery request and determine whether it carries an emergency call identifier. If it carries an emergency call identifier, it is determined whether the current network node meets the emergency call relay requirements of the remote node. In some embodiments, the emergency call relay requirements may include whether to support the emergency call requirements required by the remote node, and may also include whether to support the relay service requirements required by the remote node. The connection establishment unit 42 determines that the current network node can meet the emergency call relay requirement of the remote node, and then establishes a Unicast communication connection with the remote node. In some embodiments, the connection establishment unit 42 may send relay discovery feedback information to the remote node to inform the remote node to establish a unicast communication connection.
  • the information acquisition unit 43 enables the network node to acquire the emergency communication service identifier and emergency communication target number from the remote node during the establishment process of the unicast communication connection.
  • the call sending unit 44 can determine that the current call is an emergency call according to the received emergency communication service identifier, and then use the emergency communication target number as the called number to send an emergency call request to the network side.
  • the call sending unit 44 may initiate an emergency call request to the core network by sending a service request with a service type of emergency service fallback to the AMF.
  • Such a network node can identify the emergency call needs of the remote node in the relay discovery request, and then, if it can provide the corresponding relay service, establish a device-to-device connection with the terminal, replacing the remote node.
  • the terminal initiates an emergency call request to the network side and acts as a relay between the remote terminal and the network side, so that the remote node can quickly and efficiently use the relay service to implement emergency calls and avoid the failure of the connected relay node to provide emergency call services.
  • Emergency call failure improves the success rate and efficiency of emergency calls.
  • the connection establishment unit 52 may include a first determination subunit 521 , a second determination subunit 522 and a connection establishment subunit 523 .
  • the first judgment subunit 521 can determine whether the relay discovery request includes an emergency call identifier.
  • the second determination subunit 522 can determine whether the emergency communication target number is in a pre-stored emergency number set and meets the conditions for serving as a relay node when the relay discovery request includes an emergency call identifier.
  • the connection establishment subunit 523 can establish a unicast communication connection with the remote node when the emergency communication target number is in the pre-stored emergency number set and meets the conditions for being a relay node.
  • Such a network node can promptly discover that the current relay discovery request is a request for an emergency call, and then only establishes a single connection with the remote node after confirming that it can provide relay services and can provide relay services corresponding to emergency calls. broadcast communication connection, improving the reliability of relay services and the success rate of emergency call establishment.
  • the network node can also include a number set acquisition unit 45, which can establish a connection with the 5G core network in advance, obtain the emergency number set issued by the 5G network, and store it to ensure that it is connected to the 5G core network.
  • the PDN session between has been established.
  • the network node may also include a communication maintenance unit 46, which can serve as a relay node between the remote node and the 5G core network, and maintain emergency communication calls between the remote node and the 5G core network. connection to ensure smooth emergency communications.
  • a communication maintenance unit 46 which can serve as a relay node between the remote node and the 5G core network, and maintain emergency communication calls between the remote node and the 5G core network. connection to ensure smooth emergency communications.
  • FIG. 6 A schematic diagram of other embodiments of the network node 60 of the present disclosure is shown in FIG. 6 .
  • the request unit 61 can generate and send a relay discovery request, where the relay discovery request includes an emergency call identifier.
  • the request unit 61 finds that the current network node is far away from an access point that can provide access services (such as a base station), it can send a relay discovery request in order to find an access point that can provide relay services. network node.
  • the relay discovery request may be sent in the form of a broadcast.
  • the request unit 61 may generate a relay discovery request when it needs to make an emergency call and is far away from an access point (such as a base station) that can provide access services, and discover the relay through the relay discovery request.
  • the request carries the emergency call identifier.
  • the relay discovery request may also carry an emergency communication target number (such as 110, 119, etc.).
  • the connection unit 62 can establish a unicast communication connection with the network node upon receiving relay discovery feedback information from other network nodes.
  • the connection unit 62 may select a network node to provide relay services according to a predetermined policy.
  • the predetermined strategy may include selection according to one or more of the priority of the network node, the quality of service that can be provided, or the degree of stability.
  • the information providing unit 63 can send the emergency communication service identifier and the emergency communication target number to the opposite end network node that establishes the on-demand communication connection, so that the opposite end network node initiates an emergency call request to the network side.
  • Such a network node can inform candidate relay nodes that it needs to provide emergency call services during the relay node discovery process when it needs to initiate an emergency call and it is difficult to directly connect to the access point, thereby selecting a network node that can provide corresponding emergency call services.
  • the node can quickly and efficiently utilize relay services to implement emergency calls, improving the success rate and efficiency of emergency calls.
  • the network node includes memory 701 and processor 702.
  • the memory 701 can be a disk, flash memory or any other non-volatile storage medium.
  • the memory is used to store instructions in corresponding embodiments of the above emergency call method.
  • Processor 702 is coupled to memory 701 and may be implemented as one or more integrated circuits, such as a microprocessor or microcontroller.
  • the processor 702 is used to execute instructions stored in the memory, which can improve the call success rate of emergency communication.
  • the network node 800 includes a memory 801 and a processor 802 .
  • Processor 802 is coupled to memory 801 via BUS bus 803 .
  • the network node 800 can also be connected to an external storage device 805 through a storage interface 804 to call external data, and can also be connected to a network or another computer system (not shown) through a network interface 806 . No further details will be given here.
  • the call success rate of emergency communication can be improved.
  • a computer-readable storage medium has computer program instructions stored thereon, and when the instructions are executed by a processor, the steps of the method in the corresponding embodiment of the emergency call method are implemented.
  • embodiments of the present disclosure may be provided as methods, apparatuses, or computer program products. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment that combines software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk memory, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein. .
  • These computer program instructions may also be stored in a computer-readable memory that causes a computer or other programmable data processing apparatus to operate in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction means, the instructions
  • the device implements the functions specified in a process or processes of the flowchart and/or a block or blocks of the block diagram.
  • These computer program instructions may also be loaded onto a computer or other programmable data processing device, causing a series of operating steps to be performed on the computer or other programmable device to produce computer-implemented processing, thereby executing on the computer or other programmable device.
  • Instructions provide steps for implementing the functions specified in a process or processes of a flowchart diagram and/or a block or blocks of a block diagram.
  • the methods and apparatus of the present disclosure may be implemented in many ways.
  • the methods and devices of the present disclosure can be implemented through software, hardware, firmware, or any combination of software, hardware, and firmware.
  • the above order for the steps of the methods is for illustration only, and the steps of the methods of the present disclosure are not limited to the order specifically described above unless otherwise specifically stated.
  • the present disclosure can also be implemented as programs recorded in recording media, and these programs include machine-readable instructions for implementing methods according to the present disclosure.
  • the present disclosure also covers recording media storing programs for executing methods according to the present disclosure.

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Abstract

本公开提出一种紧急呼叫方法、网络节点及存储介质，涉及通信技术领域。本公开的一种紧急呼叫方法，包括：网络节点获取来自远端节点的中继发现请求；在确定中继发现请求中包括紧急呼叫标识的情况下，若确定符合远端节点的紧急呼叫中继需求，则建立与远端节点的单播通信连接；网络节点获取来自远端节点的紧急通信业务标识和紧急通信目标号码；网络节点根据紧急通信业务标识和紧急通信目标号码向网络侧发送紧急呼叫请求。通过这样的方法，提高了紧急呼叫的成功率。

Description

紧急呼叫方法、网络节点及存储介质
相关申请的交叉引用
本申请是以CN申请号为202210466059.4，申请日为2022年4月29日的申请为基础，并主张其优先权，该CN申请的公开内容在此作为整体引入本申请中。
技术领域
本公开涉及通信技术领域，特别是一种紧急呼叫方法、网络节点及存储介质。
背景技术
D2D(Device-to-Device，设备到设备)通信，或称为ProSe(Proximity based Services,邻近服务)。新一代近域接入技术对运营商的吸引点之一，就是支持ProSe的终端可以通过高频链路与多个邻近的U2N Relay(UE to Network Relay,终端到网络中继)连接，并通过这些U2N Relay接入蜂窝网。
发明内容
本公开的一个目的在于提高紧急通信的呼叫成功概率。
根据本公开的一些实施例的一个方面，提出一种紧急呼叫方法，包括：网络节点获取来自远端节点的中继发现请求；在确定中继发现请求中包括紧急呼叫标识的情况下，若确定网络节点符合远端节点的紧急呼叫中继需求，则建立与远端节点的单播通信连接；网络节点获取来自远端节点的紧急通信业务标识和紧急通信目标号码；网络节点根据紧急通信业务标识和紧急通信目标号码向网络侧发送紧急呼叫请求。
在一些实施例中，中继发现请求中还包括紧急通信目标号码；确定符合远端节点的紧急呼叫中继需求包括：网络节点确定紧急通信目标号码在预存的紧急号码集合中，且符合作为中继节点的条件，则确定符合远端节点的紧急呼叫中继需求。
在一些实施例中，紧急呼叫标识与紧急通信业务标识相同。
在一些实施例中，该方法还包括：网络节点建立与5G核心网的连接；获取5G网络下发的紧急号码集合并存储。
在一些实施例中，向网络侧发送紧急呼叫请求包括：网络节点向AMF发送业务类型为紧急业务回落的服务请求。
在一些实施例中，该方法还包括：网络节点作为远端节点与5G核心网间的中继节点，维持远端节点与5G核心网间的紧急通信呼叫连接。
在一些实施例中，向网络侧发送紧急呼叫请求包括：网络节点向AMF发送业务类型为紧急业务回落的服务请求；该方法还包括：网络节点作为远端节点与5G核心网间的中继节点，维持远端节点与5G核心网间的紧急通信呼叫连接。
根据本公开的一些实施例的一个方面，提出一种紧急呼叫方法，包括：生成并发送中继发现请求，中继发现请求中包括紧急呼叫标识；在收到来自网络节点的中继发现反馈信息的情况下，建立与网络节点的单播通信连接，其中，网络节点在确定中继发现请求中包括紧急呼叫标识，且确定网络节点符合远端节点的紧急呼叫中继需求的情况下，反馈中继节点反馈信息；向网络节点发送紧急通信业务标识和紧急通信目标号码，以便网络节点向网络侧发起紧急呼叫请求。
在一些实施例中，中继发现请求中还包括紧急通信目标号码；其中，中继节点在确定紧急通信目标号码在预存的紧急号码集合中，且符合作为中继节点的条件的情况下，确定符合远端节点的紧急呼叫中继需求。
根据本公开的一些实施例的一个方面，提出一种网络节点，包括：请求获取单元，被配置为获取来自远端节点的中继发现请求；连接建立单元，被配置为在确定中继发现请求中包括紧急呼叫标识的情况下，若确定网络节点符合远端节点的紧急呼叫中继需求，则建立与远端节点的单播通信连接；信息获取单元，被配合为获取来自远端节点的紧急通信业务标识和紧急通信目标号码；呼叫发送单元，被配置为根据紧急通信业务标识和紧急通信目标号码向网络侧发送紧急呼叫请求。
在一些实施例中，中继发现请求中还包括紧急通信目标号码；连接建立单元包括：第一判断子单元，被配置为确定中继发现请求中是否包括紧急呼叫标识；第二判断子单元被配置为在中继发现请求中包括紧急呼叫标识的情况下，判断紧急通信目标号码是否在预存的紧急号码集合中，以及是否符合作为中继节点的条件；连接建立子单元，被配置为在紧急通信目标号码在预存的紧急号码集合中，且符合作为中继节点的条件的情况下，建立与远端节点的单播通信连接。
在一些实施例中，紧急呼叫标识与紧急通信业务标识相同。
在一些实施例中，该节点还包括：号码集合获取单元，被配置为建立与5G核心网的连接，获取5G网络下发的紧急号码集合并存储。
在一些实施例中，呼叫发送单元被配置为向AMF发送业务类型为紧急业务回落 的服务请求。
在一些实施例中，该节点还包括：通信维持单元，被配置为作为远端节点与5G核心网间的中继节点，维持远端节点与5G核心网间的紧急通信呼叫连接。
在一些实施例中，呼叫发送单元被配置为向AMF发送业务类型为紧急业务回落的服务请求；该节点还包括：通信维持单元，被配置为作为远端节点与5G核心网间的中继节点，维持远端节点与5G核心网间的紧急通信呼叫连接。
根据本公开的一些实施例的一个方面，提出一种网络节点，包括：请求单元，被配置为生成并发送中继发现请求，中继发现请求中包括紧急呼叫标识；连接单元，被配置为在收到中继发现反馈信息的情况下，建立与发送中继节点反馈信息的网络节点的单播通信连接，其中，网络节点在确定中继发现请求中包括紧急呼叫标识，且确定网络节点符合远端节点的紧急呼叫中继需求的情况下，反馈中继节点反馈信息；信息提供单元，被配置为向建立单播通信连接的对端网络节点发送紧急通信业务标识和紧急通信目标号码，以便对端网络节点向网络侧发起紧急呼叫请求。
根据本公开的一些实施例的一个方面，提出一种网络节点，包括：存储器；以及耦接至存储器的处理器，处理器被配置为基于存储在存储器的指令执行如上文中任意一种方法。
根据本公开的一些实施例的一个方面，提出一种非瞬时性计算机可读存储介质，其上存储有计算机程序指令，该指令被处理器执行时实现上文中任意一种方法的步骤。
根据本公开的一些实施例的一个方面，提出一种计算机程序，用于使处理器执行上文中任意一种紧急呼叫方法。
附图说明
此处所说明的附图用来提供对本公开的进一步理解，构成本公开的一部分，本公开的示意性实施例及其说明用于解释本公开，并不构成对本公开的不当限定。
图1为本公开的紧急呼叫方法的一些实施例的流程图。
图2为本公开的紧急呼叫方法的另一些实施例的流程图。
图3为本公开的紧急呼叫方法的一些实施例的信令流程图。
图4为本公开的网络节点的一些实施例的示意图。
图5为本公开的网络节点中连接建立单元的一些实施例的示意图。
图6为本公开的网络节点的另一些实施例的示意图。
图7为本公开的网络节点的又一些实施例的示意图。
图8为本公开的网络节点的再一些实施例的示意图。
具体实施方式
下面通过附图和实施例，对本公开的技术方案做进一步的详细描述。
网络中的节点，如用户终端节点可以作为中继节点，当相对于网络侧较远的远端节点试图连接网络时，可以通过终端间的接口与终端-网络中继节点连接至5GC(5G核心网)。
发明人发现，目前还没有5G ProSe UE-To-Network Relay紧急通信业务的实现方案，而利用中继服务实现紧急通信业务能够提高紧急通信的呼叫成功率，提高用户体验。
本公开的紧急呼叫方法的一些实施例的流程图如图1所示。
在步骤111中，网络节点获取来自远端节点的中继发现请求。在一些实施例中，网络节点预先注册至5G核心网，并接收5G核心网下发的紧急号码集合，网络节点与5G核心网间建立PDU(Protocol Data Unit，协议数据单元)会话。
在步骤112中，网络节点解析中继发现请求，判断其中是否携带了紧急呼叫标识。若其中携带了紧急呼叫标识，则执行步骤213；否则，当前中继发现请求并非针对于紧急呼叫发起，可以执行相关技术中的中继发现流程。
在步骤113中，网络节点判断自身是否符合该远端节点的紧急呼叫中继需求。在一些实施例中，紧急呼叫中继需求可以包括是否支持远端节点所需的紧急呼叫需求，还可以包括是否支持远端节点所需的中继服务需求。
在一些实施例中，中继发现请求中还可以携带紧急通信目标号码，网络节点通过将该紧急通信目标号码与自身存储的紧急号码集合相匹配，若匹配成功，则网路节点支持远端节点所需的紧急呼叫需求，进而执行是否满足中继服务需求的判断。满足中继服务需求的判断条件可以为相关技术中的任意一种。在一些实施例中，可以根据收到的中继发现请求的信号强度、信号质量，以及中继节点自身的资源状态等中的一项或多项判断是否能够为该远端节点提供中继服务。
若网络节点确定自身能够满足该远端节点的紧急呼叫中继需求，则执行步骤114；否则抛弃该中继发现请求，对于当前网络节点而言的中继节点发现流程结束。
在步骤114中，网络节点建立与远端节点的Unicast(单播)通信连接。在一些 实施例中，网络节点可以向远端节点发送中继发现反馈信息，告知远端节点建立单播通信连接。
在步骤115中，在单播通信连接建立过程中，网络节点获取来自远端节点的紧急通信业务标识和紧急通信目标号码。在一些实施例中，该紧急通信业务标识可以与上述步骤112中的紧急呼叫标识相同。
在步骤116中，网络节点根据收到的紧急通信业务标识确定当前的呼叫为紧急呼叫，进而将紧急通信目标号码作为被叫号码，向网络侧发送紧急呼叫请求。在一些实施例中，网络节点可以向AMF发送业务类型为紧急业务回落(Emergency Service Fallback)的服务请求。网络侧基于相关技术中对于紧急呼叫请求的处理方式将该紧急呼叫请求转接至被叫方。
通过上述实施例中的方法，能够网络节点能够在中继发现请求中识别出远端节点的紧急呼叫需求，进而在自身能够提供对应的中继服务的情况下，建立与终端之间的设备到设备的连接，代替远端终端向网络侧发起紧急呼叫请求，并作为远端终端与网络侧的中继，从而使远端节点能够迅速、高效利用中继服务实现紧急呼叫，避免连接的中继节点无法提供紧急呼叫服务导致紧急呼叫失败，提高了紧急呼叫的成功率和效率。
本公开的紧急呼叫方法的另一些实施例的流程图如图2所示。
在步骤221中，远端节点生成并发送中继发现请求，中继发现请求中包括紧急呼叫标识。在一些实施例中，远端节点可以在发现自身距离能够提供接入服务的接入点(如基站)距离较远的情况下，发送中继发现请求，以便寻找能够提供中继服务的网络节点。在一些实施例中，中继发现请求可以以广播的形式发送。
在一些实施例中，远端节点可以在需要发出紧急呼叫、且自身距离能够提供接入服务的接入点(如基站)距离较远的情况下，生成中继发现请求，并通过中继发现请求中携带紧急呼叫标识。在一些实施例中，中继发现请求中还可以携带紧急通信目标号码(如110、119等)。
在步骤222中，远端节点判断是否收到中继发现反馈信息。若收到中继发现反馈信息，则执行步骤223。否则，等待接收反馈信息，或重新发送中继发现请求。
在一些实施例中，网络节点可以根据上文所示实施例中的方式，确定是否符合远端节点的紧急呼叫中继需求，在确定符合远端节点的紧急呼叫中继需求的情况下，向远端节点发送中继发现反馈信息。
在步骤223中，远端节点建立与提供中继发现反馈信息的网络节点间的单播通信连接。在一些实施例中，当远端节点收到多个中继发现反馈信息时，可以根据预定策略选择一个网络节点提供中继服务。在一些实施例中，预定策略可以包括按照网络节点的优先级、能够提供的服务质量或稳定程度中的一项或多项进行选择。
在步骤224中，远端节点通过单播通信连接，将紧急通信业务标识和紧急通信目标号码发送给选中的中继节点。
通过上述实施例中的方式，网络节点能够在需要发起紧急呼叫，且自身难以与接入点直接连接的情况下，在中继节点发现过程告知网络节点需要提供紧急呼叫服务，从而选择能够提供对应紧急呼叫服务的网络节点作为中继节点，进而能够迅速、高效利用中继服务实现紧急呼叫，提高了紧急呼叫的成功率和效率。
本公开的紧急呼叫方法的一些实施例的信令流程图如图3所示。
在前序准备步骤310中，具备提供中继服务的网络节点(图中称为中继节点32)经注册到5G网络，注册过程中保存了网络下发的紧急号码集合，且建立PDU会话。
在311中，远端节点31(Remote UE)打算发起某个紧急通信呼叫(如拨打110)时，通过model B的5G ProSe Discovery(邻近服务发现)过程寻找合适的中继节点。在一些实施例中，可以通过在Discovery Solicitation Message(发现请求信息)里带上紧急通信业务标识和紧急通信目标号码的方式发起中继节点发现过程。
在312中，中继节点32收到Discovery Solicitation Message，确定其中包括紧急通信业务标识，则确定当前请求为需要提供中继服务的中继服务请求。当中继节点确定紧急通信目标号码在自己保存的紧急号码列表里，并确定自身满足作为该远端节点31的中继节点的条件后，触发执行313。
在313中，中继节点32向远端节点31返回中继节点反馈信息。
在314中，远端节点31和中继节点32建立单播模式的通信连接，并且把紧急通信业务标识和紧急通信目标号码传递给中继节点32。
在315中，中继节点32决定代替远端节点Remote UE向5G网络发起紧急通信业务，触发执行316。
在316中，中继节点32向AMF 34发起服务请求Service Request，该服务请求的业务类型为紧急业务回落(Emergency Service Fallback)。
在317中，AMF 34向NG-RAN(NG-Radio Access Network，5G无线接入网)返回基于N2接口的紧急请求(N2 Request for emergency fallback)。
在318中，中继节点32与远端节点之间保持5G Prose Direct Communication(5G邻近服务直接通信)，中继节点32与紧急通信目标号码之间建立正常的IMS紧急通信呼叫连接。中继节点32为远端节点31建立起正常的IMS(EPS(Evolved Packet System，演进的分组系统)fallback(回落))紧急通信呼叫连接。
通过上述实施例中的方式，对5G ProSe Direct Discovery流程消息以及消息里的携带的信息进行了改进，使得针对紧急呼叫发起的中继发现能够被尽快发现；中继节点能够先行确定自身是否能够支持针对紧急呼叫的中继服务，提高中继节点选择的可靠度。在一些实施例中，上述对于执行中继服务的节点的改进便于通过软件升级的方式实现，有利于提高部署效率，有利于推广应用。
本公开的网络节点40的一些实施例的示意图如图4所示。网络节点40可以作为中继节点，为远端节点提供中继服务。
请求获取单元41能够获取来自远端节点的中继发现请求。
连接建立单元42能够解析中继发现请求，判断其中是否携带了紧急呼叫标识。若其中携带了紧急呼叫标识，则判断当前网络节点是否符合该远端节点的紧急呼叫中继需求。在一些实施例中，紧急呼叫中继需求可以包括是否支持远端节点所需的紧急呼叫需求，还可以包括是否支持远端节点所需的中继服务需求。连接建立单元42确定当前网络节点能够满足该远端节点的紧急呼叫中继需求，则建立与远端节点的Unicast(单播)通信连接。在一些实施例中，连接建立单元42可以向远端节点发送中继发现反馈信息，告知远端节点建立单播通信连接。
信息获取单元43能够在单播通信连接建立过程中，网络节点获取来自远端节点的紧急通信业务标识和紧急通信目标号码。
呼叫发送单元44能够根据收到的紧急通信业务标识确定当前的呼叫为紧急呼叫，进而将紧急通信目标号码作为被叫号码，向网络侧发送紧急呼叫请求。呼叫发送单元44可以通过向AMF发送业务类型为紧急业务回落的服务请求的方式发起向核心网的紧急呼叫请求。
这样的网络节点能够在中继发现请求中识别出远端节点的紧急呼叫需求，进而在自身能够提供对应的中继服务的情况下，建立与终端之间的设备到设备的连接，代替远端终端向网络侧发起紧急呼叫请求，并作为远端终端与网络侧的中继，从而使远端节点能够迅速、高效利用中继服务实现紧急呼叫，避免连接的中继节点无法提供紧急呼叫服务导致紧急呼叫失败，提高了紧急呼叫的成功率和效率。
在一些实施例中，如图5所示，连接建立单元52可以包括第一判断子单元521、第二判断子单元522和连接建立子单元523。第一判断子单元521能够确定中继发现请求中是否包括紧急呼叫标识。第二判断子单元522能够在中继发现请求中包括紧急呼叫标识的情况下，判断紧急通信目标号码是否在预存的紧急号码集合中，以及是否符合作为中继节点的条件。连接建立子单元523能够在紧急通信目标号码在预存的紧急号码集合中，且符合作为中继节点的条件的情况下，建立与远端节点的单播通信连接。
这样的网络节点能够及时发现当前中继发现请求为针对紧急呼叫的请求，进而在确定自身能够提供中继服务、且能够提供对应紧急呼叫的中继服务的情况下才建立与远端节点的单播通信连接，提高了中继服务的可靠度和紧急呼叫建立的成功率。
在一些实施例中，如图4所示，网络节点还可以包括号码集合获取单元45，能够预先建立与5G核心网的连接，获取5G网络下发的紧急号码集合并存储，确保与5G核心网间的PDN会话已建立。
在一些实施例中，如图4所示，网络节点还可以包括通信维持单元46，能够作为远端节点与5G核心网间的中继节点，维持远端节点与5G核心网间的紧急通信呼叫连接，从而确保紧急通信的顺利进行。
本公开的网络节点60的另一些实施例的示意图如图6所示。
请求单元61能够生成并发送中继发现请求，中继发现请求中包括紧急呼叫标识。在一些实施例中，请求单元61可以在发现当前网络节点距离能够提供接入服务的接入点(如基站)距离较远的情况下，发送中继发现请求，以便寻找能够提供中继服务的网络节点。在一些实施例中，中继发现请求可以以广播的形式发送。在一些实施例中，请求单元61可以在需要发出紧急呼叫、且自身距离能够提供接入服务的接入点(如基站)距离较远的情况下，生成中继发现请求，并通过中继发现请求中携带紧急呼叫标识。在一些实施例中，中继发现请求中还可以携带紧急通信目标号码(如110、119等)。
连接单元62能够在收到来自其他网络节点的中继发现反馈信息的情况下，建立与网络节点的单播通信连接。在一些实施例中，当连接单元62收到多个中继发现反馈信息时，可以根据预定策略选择一个网络节点提供中继服务。在一些实施例中，预定策略可以包括按照网络节点的优先级、能够提供的服务质量或稳定程度中的一项或多项进行选择。
信息提供单元63能够向建立点播通信连接的对端网络节点发送紧急通信业务标识和紧急通信目标号码，以便对端网络节点向网络侧发起紧急呼叫请求。
这样的网络节点能够在需要发起紧急呼叫，且自身难以与接入点直接连接的情况下，在中继节点发现过程告知候选中继节点需要提供紧急呼叫服务，从而选择能够提供对应紧急呼叫服务的节点作为中继节点，进而能够迅速、高效利用中继服务实现紧急呼叫，提高了紧急呼叫的成功率和效率。
本公开网络节点的一个实施例的结构示意图如图7所示。网络节点包括存储器701和处理器702。其中：存储器701可以是磁盘、闪存或其它任何非易失性存储介质。存储器用于存储上文中紧急呼叫方法的对应实施例中的指令。处理器702耦接至存储器701，可以作为一个或多个集成电路来实施，例如微处理器或微控制器。该处理器702用于执行存储器中存储的指令，能够提高紧急通信的呼叫成功率。
在一个实施例中，还可以如图8所示，网络节点800包括存储器801和处理器802。处理器802通过BUS总线803耦合至存储器801。该网络节点800还可以通过存储接口804连接至外部存储装置805以便调用外部数据，还可以通过网络接口806连接至网络或者另外一台计算机系统(未标出)。此处不再进行详细介绍。
在该实施例中，通过存储器存储数据指令，再通过处理器处理上述指令，能够提高紧急通信的呼叫成功率。
在另一个实施例中，一种计算机可读存储介质，其上存储有计算机程序指令，该指令被处理器执行时实现紧急呼叫方法对应实施例中的方法的步骤。本领域内的技术人员应明白，本公开的实施例可提供为方法、装置、或计算机程序产品。因此，本公开可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本公开可采用在一个或多个其中包含有计算机可用程序代码的计算机可用非瞬时性存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本公开是参照根据本公开实施例的方法、设备(系统)和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器 执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
至此，已经详细描述了本公开。为了避免遮蔽本公开的构思，没有描述本领域所公知的一些细节。本领域技术人员根据上面的描述，完全可以明白如何实施这里公开的技术方案。
可能以许多方式来实现本公开的方法以及装置。例如，可通过软件、硬件、固件或者软件、硬件、固件的任何组合来实现本公开的方法以及装置。用于所述方法的步骤的上述顺序仅是为了进行说明，本公开的方法的步骤不限于以上具体描述的顺序，除非以其它方式特别说明。此外，在一些实施例中，还可将本公开实施为记录在记录介质中的程序，这些程序包括用于实现根据本公开的方法的机器可读指令。因而，本公开还覆盖存储用于执行根据本公开的方法的程序的记录介质。
最后应当说明的是：以上实施例仅用以说明本公开的技术方案而非对其限制；尽管参照较佳实施例对本公开进行了详细的说明，所属领域的普通技术人员应当理解：依然可以对本公开的具体实施方式进行修改或者对部分技术特征进行等同替换；而不脱离本公开技术方案的精神，其均应涵盖在本公开请求保护的技术方案范围当中。

Claims (18)

  1. 一种紧急呼叫方法，包括：
    网络节点获取来自远端节点的中继发现请求；
    在确定所述中继发现请求中包括紧急呼叫标识的情况下，若确定所述网络节点符合所述远端节点的紧急呼叫中继需求，则建立与所述远端节点的单播通信连接；
    所述网络节点获取来自所述远端节点的紧急通信业务标识和紧急通信目标号码；和
    所述网络节点根据所述紧急通信业务标识和所述紧急通信目标号码向网络侧发送紧急呼叫请求。
  2. 根据权利要求1所述的紧急呼叫方法，其中，所述中继发现请求中还包括紧急通信目标号码；
    所述确定符合所述远端节点的紧急呼叫中继需求包括：
    所述网络节点确定所述紧急通信目标号码在预存的紧急号码集合中，且符合作为中继节点的条件，则确定符合所述远端节点的紧急呼叫中继需求。
  3. 根据权利要求1所述的紧急呼叫方法，其中，所述紧急呼叫标识与所述紧急通信业务标识相同。
  4. 根据权利要求2所述的紧急呼叫方法，还包括：
    所述网络节点建立与5G核心网的连接；和
    获取所述5G网络下发的紧急号码集合并存储。
  5. 根据权利要求1所述的紧急呼叫方法，其中，
    所述向网络侧发送紧急呼叫请求包括：所述网络节点向AMF发送业务类型为紧急业务回落的服务请求。
  6. 根据权利要求1或5所述的紧急呼叫方法，还包括：
    所述网络节点作为所述远端节点与所述5G核心网间的中继节点，维持所述远端节点与所述5G核心网间的紧急通信呼叫连接。
  7. 一种紧急呼叫方法，包括：
    生成并发送中继发现请求，所述中继发现请求中包括紧急呼叫标识；
    在收到来自网络节点的中继发现反馈信息的情况下，建立与所述网络节点的单播通信连接，其中，所述网络节点在确定所述中继发现请求中包括紧急呼叫标识，且确定所述网络节点符合所述远端节点的紧急呼叫中继需求的情况下，反馈所述中继节点反馈信息；和
    向所述网络节点发送紧急通信业务标识和紧急通信目标号码，以便所述网络节点向网络侧发起紧急呼叫请求。
  8. 根据权利要求7所述的紧急呼叫方法，其中，
    所述中继发现请求中还包括所述紧急通信目标号码；和
    所述中继节点在确定所述紧急通信目标号码在预存的紧急号码集合中，且符合作为中继节点的条件的情况下，确定符合所述远端节点的紧急呼叫中继需求。
  9. 一种网络节点，包括：
    请求获取单元，被配置为获取来自远端节点的中继发现请求；
    连接建立单元，被配置为在确定所述中继发现请求中包括紧急呼叫标识的情况下，若确定所述网络节点符合所述远端节点的紧急呼叫中继需求，则建立与所述远端节点的单播通信连接；
    信息获取单元，被配合为获取来自所述远端节点的紧急通信业务标识和紧急通信目标号码；和
    呼叫发送单元，被配置为根据所述紧急通信业务标识和所述紧急通信目标号码向网络侧发送紧急呼叫请求。
  10. 根据权利要求9所述的网络节点，其中，所述中继发现请求中还包括紧急通 信目标号码；
    所述连接建立单元包括：
    第一判断子单元，被配置为确定所述中继发现请求中是否包括所述紧急呼叫标识；
    所述第二判断子单元被配置为在所述中继发现请求中包括所述紧急呼叫标识的情况下，判断所述紧急通信目标号码是否在预存的紧急号码集合中，以及是否符合作为中继节点的条件；和
    连接建立子单元，被配置为在所述紧急通信目标号码在预存的紧急号码集合中，且符合作为中继节点的条件的情况下，建立与所述远端节点的单播通信连接。
  11. 根据权利要求9所述的网络节点，其中，所述紧急呼叫标识与所述紧急通信业务标识相同。
  12. 根据权利要求9的网络节点，还包括：
    号码集合获取单元，被配置为建立与5G核心网的连接，获取所述5G网络下发的紧急号码集合并存储。
  13. 根据权利要求9所述的网络节点，其中，所述呼叫发送单元被配置为向AMF发送业务类型为紧急业务回落的服务请求。
  14. 根据权利要求9或13所述的网络节点，还包括：
    通信维持单元，被配置为作为所述远端节点与所述5G核心网间的中继节点，维持所述远端节点与所述5G核心网间的紧急通信呼叫连接。
  15. 一种网络节点，包括：
    请求单元，被配置为生成并发送中继发现请求，所述中继发现请求中包括紧急呼叫标识；
    连接单元，被配置为在收到中继发现反馈信息的情况下，建立与发送所述中继节点反馈信息的网络节点的单播通信连接，其中，网络节点在确定所述中继发现请求中包括紧急呼叫标识，且确定所述网络节点符合所述远端节点的紧急呼叫中继需求的情 况下，反馈所述中继节点反馈信息；
    信息提供单元，被配置为向建立所述单播通信连接的对端网络节点发送紧急通信业务标识和紧急通信目标号码，以便所述对端网络节点向网络侧发起紧急呼叫请求。
  16. 一种网络节点，包括：
    存储器；以及
    耦接至所述存储器的处理器，所述处理器被配置为基于存储在所述存储器的指令执行如权利要求1至8任一项所述的方法。
  17. 一种非瞬时性计算机可读存储介质，其上存储有计算机程序指令，该指令被处理器执行时实现权利要求1至8任意一项所述的方法的步骤。
  18. 一种计算机程序，用于使处理器执行权利要求1至8任意一项所述的方法。
PCT/CN2022/125951 2022-04-29 2022-10-18 紧急呼叫方法、网络节点及存储介质 WO2023206987A1 (zh)

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