WO2023185836A1 - Procédé d'indication pour la sélection d'un serveur d'application périphérique, ainsi que terminal et dispositif côté réseau - Google Patents

Procédé d'indication pour la sélection d'un serveur d'application périphérique, ainsi que terminal et dispositif côté réseau Download PDF

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Publication number
WO2023185836A1
WO2023185836A1 PCT/CN2023/084380 CN2023084380W WO2023185836A1 WO 2023185836 A1 WO2023185836 A1 WO 2023185836A1 CN 2023084380 W CN2023084380 W CN 2023084380W WO 2023185836 A1 WO2023185836 A1 WO 2023185836A1
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WIPO (PCT)
Prior art keywords
target
terminal
dns
eas
information
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PCT/CN2023/084380
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English (en)
Chinese (zh)
Inventor
吕华章
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维沃移动通信有限公司
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Publication of WO2023185836A1 publication Critical patent/WO2023185836A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/45—Network directories; Name-to-address mapping
    • H04L61/4505—Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols
    • H04L61/4511—Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols using domain name system [DNS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08—Mobility data transfer
    • H04W8/14—Mobility data transfer between corresponding nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support

Definitions

  • the present application belongs to the field of wireless communication technology, and specifically relates to an instruction method for selecting an edge application server, a terminal and a network side device.
  • the Edge Application Server Discovery Function is a network element used to process domain name system (Domain Name System, DNS) queries of terminals.
  • the terminal sends a DNS query to EASDF, and then EASDF makes a judgment based on the DNS query to determine whether to send the DNS query to the central DNS (Central DNS, C-DNS) or the local (Local DNS, L-DNS).
  • the EASDF obtains the processing method for DNS query from the session management function (Session Management Function, SMF).
  • SMF Session Management Function
  • EASDF sends the Fully Qualified Domain Name (FQDN) and other information in the DNS query to SMF.
  • SMF provides EASDF with corresponding DNS processing rules to help EASDF determine which DNS service to send the DNS query to.
  • the Internet Protocol (IP) address of the DNS server is C-DNS or L-DNS.
  • C-DNS or L-DNS finds the IP address corresponding to the FQDN, it sends it to EASDF.
  • EASDF saves the query result to SMF and then sends it to the terminal, so that the terminal obtains the server IP address of the requested FQDN.
  • EAS Edge Application Server
  • the same Edge Application Server (EAS) IP address can be selected for DNS queries of multiple terminals, it may be possible to provide terminals with lower latency services.
  • EAS Edge Application Server
  • business processing can be optimized in the same application server.
  • EAS IP address can be selected for these terminals, these terminals can select the same application server. From an application layer perspective, this can avoid the business between servers caused by multiple terminals selecting multiple game servers. Interaction and latency.
  • a formation use case such as a vehicle formation
  • all member units have similar attributes and requirements, such as driving direction and route.
  • driving direction and route For example, in a specific platoon, all units have similar movement characteristics, namely towards Moving in the same direction and speed, close to each other, etc.
  • the delay in command issuance and coordination can be shortened.
  • Embodiments of the present application provide an edge application server selection instruction method, a terminal, and a network side device, which can solve the problem of how to select the same EAS for multiple terminals.
  • a method for instructing edge application server selection including: a first network side device receiving a first request sent by a second network side device, wherein the first request is used to request the first network side device.
  • the side device indicates how to process the DNS query sent by the first terminal; the first network side device sends instruction information to the second network side device according to the target information of the first terminal, wherein the instruction The information is used to instruct the second network side device to use a target processing method to process the DNS query sent by the first terminal, and the target processing method is used to select the same EAS for the first terminal as that of at least one second terminal,
  • the target processing method includes one of the following: using target DNS message processing rules that are the same as the DNS message processing rules corresponding to the at least one second terminal; sending a target edge application carrying the target to the first terminal A target DNS response of a server EAS address that is the same as the EAS address selected for the at least one second terminal.
  • an edge application server selection instructing device includes: a first receiving module configured to receive a first request sent by a second network side device, wherein the first request is used to request the first network The side device indicates how to process the DNS query sent by the first terminal; the first sending module is configured to send indication information to the second network side device according to the target information of the first terminal, wherein the indication The information is used to instruct the second network side device to use a target processing method to process the DNS query sent by the first terminal, and the target processing method is used to select the same EAS for the first terminal as that of at least one second terminal,
  • the target processing method includes one of the following: using target DNS message processing rules that are the same as the DNS message processing rules corresponding to the at least one second terminal; sending a target edge application carrying the target to the first terminal A target DNS response of a server EAS address that is the same as the EAS address selected for the at least one second terminal.
  • a method for responding to a DNS query including: a second network side device receiving a first DNS query sent by a first terminal; and the second network side device sending the first DNS query to the first network side device.
  • Request wherein the first request is used to request the first network side device to indicate a manner of processing the DNS query sent by the first terminal;
  • the second network side device receives the instruction information sent by the first network side device, wherein the instruction information is used to instruct the second network side device to use a target processing method to process the DNS query sent by the first terminal.
  • the target processing method is used to select the same EAS for the first terminal as that of at least one second terminal; the second network side device adopts the target processing method to respond to the first DNS query; wherein,
  • the target processing method includes at least one of the following: using target DNS message processing rules, the target DNS message processing rules are the same as the DNS message processing rules corresponding to the at least one second terminal; sending a target edge to the first terminal A target DNS response with an EAS address of the application server, the target EAS address being the same as the at least one second The EAS address selected by the terminal is the same.
  • a DNS query response device including: a second receiving module for receiving the first DNS query sent by the first terminal; and a second sending module for sending to the first network side device.
  • a first request wherein the first request is used to request the first network side device to indicate how to process the DNS query sent by the first terminal; the second receiving module is also used to receive the first
  • the network side device sends instruction information, wherein the instruction information is used to instruct the second network side device to use a target processing method to process the DNS query sent by the first terminal, and the target processing method is used to process the DNS query sent by the first terminal.
  • the terminal selects the same EAS as at least one second terminal; a response module is configured to respond to the first DNS query using the target processing method; wherein the target processing method includes at least one of the following: using the target DNS Message processing rules, the target DNS message processing is the same as the DNS message processing rule corresponding to the at least one second terminal; sending a target DNS response carrying the target edge application server EAS address to the first terminal, the target EAS address The same as the EAS address selected for the at least one second terminal.
  • a terminal group configuration method including: a fourth network side device determines EAS deployment information of a target terminal group according to a preset rule, wherein the preset rule indicates that the target terminal group needs to be The terminals in select the same EAS; the fourth network side device sends the EAS deployment information of the target terminal group to the third network side device.
  • a device for configuring a terminal group including: a determination module configured to determine EAS deployment information of a target terminal group according to preset rules, wherein the preset rule indicates that the EAS deployment information of the target terminal group needs to be The terminals in the terminal select the same EAS; the third sending module is configured to send the EAS deployment information of the target terminal group to the third network side device.
  • a DNS query method including: a first terminal receiving a first message sent by a first network side device, wherein the first message carries DNS policy information; According to the DNS policy information, a DNS query is sent to a DNS server; wherein the DNS server includes EASDF.
  • a DNS query device including: a third receiving module, configured to receive a first message sent by a first network side device, wherein the first message carries DNS policy information; a fourth sending module A module configured to send a DNS query to a DNS server according to the DNS policy information; wherein the DNS server includes EASDF.
  • a terminal in a ninth aspect, includes a processor and a memory.
  • the memory stores programs or instructions that can be run on the processor.
  • the program or instructions When the program or instructions are executed by the processor, the following implementations are implemented: The steps of the method described in seven aspects.
  • a terminal including a processor and a communication interface, wherein the processor is used to implement the steps of the method described in the seventh aspect, and the communication interface is used to communicate with an external device.
  • a network side device in an eleventh aspect, includes a processor and a memory.
  • the memory stores programs or instructions that can be run on the processor.
  • the program or instructions are used by the processor. When executed, the steps of the method described in the first aspect, or the steps of the method described in the third aspect, or the steps of the method described in the fifth aspect are implemented.
  • a network side device including a processor and a communication interface, wherein the processor is used to implement the steps of the method described in the first aspect, or to implement the method described in the third aspect. Steps, or steps for implementing the method as described in the fifth aspect, the communication interface is used to communicate with an external device.
  • a DNS query system including: a terminal and a network side device.
  • the terminal can be used to perform the steps of the method described in the seventh aspect
  • the network side device can be used to perform the steps of the method described in the first aspect.
  • a readable storage medium is provided.
  • Programs or instructions are stored on the readable storage medium.
  • the steps of the method described in the first aspect are implemented, or the steps of the method are implemented.
  • a chip in a fifteenth aspect, includes a processor and a communication interface.
  • the communication interface is coupled to the processor.
  • the processor is used to run programs or instructions to implement the method described in the first aspect.
  • the steps of the method can either implement the steps of the method described in the third aspect, or implement the steps of the method described in the fifth aspect, or implement the steps of the method described in the seventh aspect.
  • a computer program/program product is provided, the computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement as described in the first aspect.
  • the first network side device instructs the second network side device to use a target processing method to process the DNS query sent by the first terminal according to the target information of the first terminal.
  • the target processing method Used to select the same EAS for the first terminal and at least one second terminal, so that the second network side device can select the same EAS for the first terminal and the second terminal, shortening the time between the EAS and the first terminal and the second terminal. Communication delay.
  • Figure 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable
  • Figure 2 shows a schematic flow chart of an instruction method for edge application server selection in an embodiment of the present application
  • FIG. 3 shows a schematic flow chart of the DNS query response method in the embodiment of the present application
  • Figure 4 shows a schematic flow chart of a terminal group configuration method in an embodiment of the present application
  • Figure 5 shows a schematic flow chart of the DNS query method in the embodiment of the present application
  • Figure 6 shows another schematic flow chart of the DNS query response method provided by the embodiment of the present application.
  • Figure 7 shows another schematic flow chart of the DNS query response method provided by the embodiment of the present application.
  • Figure 8 shows another schematic flow chart of the terminal group configuration method in the embodiment of the present application.
  • Figure 9 shows a flow chart of the DNS query method in the application embodiment
  • Figure 10 shows a schematic flow chart of an EAS switching method in an embodiment of the present application
  • Figure 11 shows a schematic structural diagram of an instruction device for edge application server selection provided by an embodiment of the present application
  • Figure 12 shows a schematic structural diagram of a DNS query response device provided by an embodiment of the present application
  • Figure 13 shows a schematic structural diagram of a terminal group configuration method provided by an embodiment of the present application.
  • Figure 14 shows a schematic structural diagram of a DNS query device provided by an embodiment of the present application.
  • Figure 15 shows a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • Figure 16 shows a schematic diagram of the hardware structure of a terminal provided by an embodiment of the present application.
  • Figure 17 shows a schematic hardware structure diagram of a network-side device provided by an embodiment of the present application.
  • first, second, etc. in the description and claims of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances so that the embodiments of the present application can be practiced in sequences other than those illustrated or described herein, and that "first" and “second” are distinguished objects It is usually one type, and the number of objects is not limited.
  • the first object can be one or multiple.
  • “and/or” in the description and claims indicates at least one of the connected objects, and the character “/" generally indicates that the related objects are in an "or” relationship.
  • LTE Long Term Evolution
  • LTE-Advanced, LTE-A Long Term Evolution
  • LTE-A Long Term Evolution
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single-carrier Frequency Division Multiple Access
  • NR New Radio
  • FIG. 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable.
  • the wireless communication system includes a terminal 11 and a network side device 12.
  • the terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a palmtop computer, a netbook, or a super mobile personal computer.
  • Tablet Personal Computer Tablet Personal Computer
  • laptop computer laptop computer
  • PDA Personal Digital Assistant
  • PDA Personal Digital Assistant
  • UMPC ultra-mobile personal computer
  • UMPC mobile Internet device
  • MID mobile Internet Device
  • AR augmented reality/virtual reality Real (virtual reality, VR) equipment
  • robots wearable devices
  • WUE vehicle user equipment
  • PUE pedestrian terminals
  • smart homes home equipment with wireless communication functions , such as refrigerators, TVs, washing machines or furniture, etc.
  • game consoles personal computers (PCs), teller machines or self-service machines and other terminal-side devices.
  • Wearable devices include: smart watches, smart bracelets, smart headphones, smart phones, etc.
  • the network side device 12 may include an access network device and/or a core network device, where the access network device 12 may also be called a radio access network device, a radio access network (Radio Access Network, RAN), or a radio access network. function or radio access network unit.
  • the access network device 12 may include a base station, a Wireless Local Area Network (WLAN) access point or a WiFi node, etc.
  • WLAN Wireless Local Area Network
  • the base station may be called a Node B, an evolved Node B (eNB), an access point, Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), home B-node, home evolved B-node , Transmitting Receiving Point (TRP) or some other suitable term in the field, as long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in the embodiment of the present application This introduction only takes the base station in the NR system as an example, and does not limit the specific type of base station.
  • eNB evolved Node B
  • BTS Base Transceiver Station
  • BSS Basic Service Set
  • ESS Extended Service Set
  • TRP Transmitting Receiving Point
  • the core network equipment may include but is not limited to at least one of the following: core network node, core network function, mobility management entity (Mobility Management Entity, MME), access mobility management function (Access and Mobility Management Function, AMF), session management function (Session Management Function, SMF), User Plane Function (UPF), Policy Control Function (PCF), Policy and Charging Rules Function (PCRF), Edge Application Service Discovery function (Edge Application Server Discovery Function, EASDF), Unified Data Management (UDM), Unified Data Repository (UDR), Home Subscriber Server (HSS), centralized network configuration ( Centralized network configuration (CNC), Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (Local NEF, or L-NEF), Binding Support Function (Binding Support Function, BSF), application function (Application Function, AF), etc.
  • MME mobility management entity
  • AMF Access and Mobility Management Function
  • SMF Session Management Function
  • UPF User Plane Function
  • PCF Policy Control Function
  • Figure 2 shows a schematic flowchart of a method for instructing edge application server selection in an embodiment of the present application.
  • the method 200 can be executed by the first network side device.
  • the method may be executed by software or hardware installed on the first network side device.
  • the first network side device may be an SMF in the core network.
  • the method may include the following steps.
  • the first network side device receives the first request sent by the second network side device, where the The first request is used to request the first network side device to indicate a manner of processing the DNS query sent by the first terminal.
  • the second network side device may request the first network side device for a method of processing the DNS query.
  • the second network side device may be EASDF.
  • the first network side device sends instruction information to the second network side device according to the target information of the first terminal, where the instruction information is used to instruct the second network side device to use a target processing method to process
  • the DNS query sent by the first terminal is processed, and the target processing method is used to select the same EAS for the first terminal as that of at least one second terminal.
  • the target processing method may include the following two processing methods (1) or (2).
  • DNS message handling rules which are the same as the DNS message handling rules corresponding to the at least one second terminal.
  • the target DNS message processing rules are used for both the DNS query of the first terminal and the DNS query of the second terminal, so that the same EAS can be selected for the two terminals.
  • EASDF can set the same DNS message processing rules for the DNS queries of the first terminal and the second terminal, that is, send the DNS queries of the first terminal and the second terminal to the same DNS server (server), thereby ensuring that the DNS server feeds back the same DNS response, so that the first terminal and the second terminal obtain the same EAS IP address. Because the same DNS server is used and the same FQDN is queried, the same EAS IP address can be found.
  • the first network side device instructs the second network side device to directly send a target DNS response of the target EAS address (for example, target EAS IP address) to the first terminal, where the target EAS address carried in the target DNS response is the same as the target EAS address carried in the target DNS response to the second terminal.
  • the EAS addresses carried in the sent DNS responses are the same, so it can be determined that the first terminal obtains the same EAS address as the second terminal, and thereby accesses the same EAS as the second terminal.
  • the EAS IP address can be directly provided to the UE by the 5G Core Network (5G Core Network, 5GC), avoiding dynamic changes in the DNS server query results and being directly designated by the 5GC.
  • 5G Core Network 5G Core Network
  • the target DNS response (which can be a DNS response triggered by 5GC or a response sent by a DNS server) can carry one target EAS address or multiple target EAS addresses.
  • the target DNS response can also carry the priority corresponding to each target EAS address.
  • the first terminal can receive the responses in order from high to low priority. In other words, the first terminal can first access the target EAS address with the highest priority, and then access the target EAS address with the second highest priority if the access fails.
  • the second terminal can also access the target EAS address with the second highest priority. Access according to the rules, thereby ensuring that the first terminal and the second terminal access the same EAS.
  • the first network side device can, based on the target information of the first terminal, To determine that the same EAS as the at least one second terminal needs to be selected for the first terminal, the first network side device sends the indication information to the second network side device.
  • the target information of the first terminal includes but is not limited to at least one of the following (1) to (6).
  • the contract information of the first terminal includes: a first indication, the first indication is used to indicate that the first terminal is allowed to use the same EAS with at least one second terminal. That is to say, when the first terminal is authorized to use the same EAS as other terminals, the second network side device can be instructed to use the above target processing method.
  • the operator can configure the same EAS IP address for multiple terminals as a value-added service, and the first terminal and the second terminal have signed and purchased the operator's edge computing optimization service, then the 5GC will be verified first, indicating that These two terminals are eligible to use the operator's value-added services.
  • the location information of the first terminal may include at least one of the following: (a) The identity of the cell accessed by the first terminal, for example, when the first terminal and the second terminal are in the same cell In the case of, instruct the second network side device to use the target processing method; (b) the tracking area where the first terminal is located, for example, when the first terminal and the second terminal are in the same tracking area or a similar area In the case of a tracking area, instruct the second network side device to use the target processing method; (c) the IP address of the first terminal, for example, when the first terminal and the second terminal are in the same IP address segment In this case, instruct the second network side device to use the target processing method; (d) serve the protocol data unit (Protocol Data Unit, PDU) session anchor (PDU Session Anchor, PSA) of the first terminal, for example
  • the identification of the base station accessed by the first terminal For example, when the base station identifiers accessed by the first terminal and the second terminal are the same (that is, the two terminals access the 5GC through one base station), then the same EAS IP address can be selected for them. If the location information of the first terminal is the same as the location information of the second terminal, the scenario described above may be satisfied: the first terminal and the second terminal perform interactive services (for example, interactive games) in the same room or venue. ). Therefore, these two terminals are qualified to use the same EAS IP address.
  • the fully qualified domain name (Fully Qualified Domain Name, FQDN) in the DNS query of the first terminal For example, when the FQDN in the first terminal's DNS query is a specified FQDN, it may be determined that the first terminal selects the same EAS as the second terminal whose query request contains these specified FQDNs, indicating that the second network
  • the side device uses the target processing method.
  • the first FQDN is the same as the second FQDN, wherein the first FQDN is the FQDN in the DNS query of the first terminal, and the second FQDN is the DNS of the at least one second terminal.
  • the FQDN in the DNS query to which the message processing rule applies.
  • the Data Network Name (DNN) accessed by the first terminal For example, when the first terminal accesses specific DNNs, it may be determined that the first terminal selects the same EAS as the second terminal that accesses these specific DNNs, and the second network side device is instructed to use the target processing method.
  • DNN Data Network Name
  • the Data Network (DN) accessed by the first terminal. For example, when the first terminal accesses specific DNs, it may be determined that the same EAS is selected for the first terminal as the second terminal accessing these specific DNs, and the second network side device is instructed to use the target processing method.
  • S-NSSAI Single Network Slice Selection Assistance Information
  • the target DNS message processing rules include one of the following:
  • Target DNS client subnet (EDNS-client-subnet, ECS) option.
  • ECS Target DNS client subnet
  • the ECS option is usually an auxiliary information used by the DNS server to provide the terminal with an EAS IP address closest to the terminal when performing DNS resolution.
  • the closest distance can be the closest geographical location or the closest route.
  • sending the indication information by the first network side device to the second network side device may include the following steps:
  • Step 1 The first network side device determines to select the same EAS for the first terminal as the at least one second terminal according to the target information of the first terminal;
  • Step 2 The first network side device sends the indication information to the second network side device.
  • the first network side device may determine that it is necessary to select the same EAS for the first terminal as the at least one second terminal according to the target information of the first terminal, and then , the first network side device sends the indication information to the second network side device.
  • the first network side device may not save the target information of the first terminal. Therefore, in a possible implementation, the first network side device determines based on the target information of the first terminal. Before selecting the same EAS for the first terminal as the at least one second terminal, the method may further include: the first network side device obtains target information of the first terminal.
  • the first network side device may obtain the subscription data of the first terminal from the UDM.
  • the SMF can send Nudm_SDM_Get) or Nudm_SDM_Subscribe via UDM to restore the terminal's subscription information and input parameters: the first UE's subscription permanent identifier (Subscription Permanent Identifier, SUPI).
  • UDM can send the first UE's subscription information to the SMF.
  • the subscription information of the first UE saved by UDM may be: the current UE is authorized to use the same EAS, for example
  • the session management subscription data of the first UE (data required for PDU session establishment) may include an element whose value is: UE is authorized to select the same EAS authorization to indicate whether the UE is authorized to use the same EAS.
  • the first network side device may obtain the location information of the first UE from the AMF.
  • the location information mainly includes the location of the first terminal in the radio access network (Radio Access Network, RAN).
  • RAN Radio Access Network
  • SMF recovers the location information of the first UE from AMF: Namf_EventExposure_Subscribe.
  • the location information of the first UE includes but is not limited to: cell ID (Cell ID) and tracking area identifier (Tracking Area Identifier, TAI), and may also be the accessed base station ID.
  • the first network side device can also obtain the User Plane Function (UPF) identifier (for example, PSA ID) and DNAI of the first terminal.
  • UPF User Plane Function
  • a target terminal group may be predefined, and the first network side device determines to select the same EAS for terminals in the target terminal group. Therefore, in this possible implementation, the first network side device determines to select the same EAS for the first terminal as the at least one second terminal according to the target information of the first terminal, which may include the following step:
  • Step 1 The first network side device determines that the first terminal belongs to a target terminal group according to the target information of the first terminal, wherein the at least one second terminal belongs to the target terminal group;
  • Step 2 The first network side device determines to select the same EAS as the at least one second terminal for the first terminal.
  • the configuration description information of the target terminal group may be predefined.
  • the configuration description information may include at least one cell identifier, indicating that terminals located in at least one cell corresponding to the at least one cell identifier form a target terminal group.
  • the configuration description information may include at least one target FQDN, indicating that terminals querying the at least one target FQDN form a target terminal group.
  • the configuration description information may include a target IP address segment, indicating that terminals located in the target IP address segment form a target terminal group. Therefore, in a possible implementation, the first network side device determines that the first terminal belongs to the target terminal group based on the target information of the first terminal, including the following steps:
  • Step 1 The first network side device compares the target information of the first terminal with the configuration description information of the target terminal group;
  • Step 2 When it is determined that the target information of the first terminal satisfies at least one item of the configuration description information of the target terminal group, determine that the first terminal belongs to the target terminal group.
  • the target information of the first terminal satisfies at least one item of the configuration description information of the target terminal group including at least one of the following:
  • the target information of the first terminal is the same as at least one item in the configuration description information of the target terminal group; for example, the configuration description information of the target terminal group includes multiple FQDNs, and the DNS query of the first terminal The FQDN is the same as one of multiple FQDNs.
  • the target terminal The configuration description information of the group includes a target cell identity, and the cell identity of the first terminal is the same as the target cell identity.
  • the target information of the first terminal is within the scope of at least one item of the configuration description information of the target terminal group.
  • the configuration description information of the target terminal group may include a target IP address segment, and the IP address of the first terminal is within the target IP address segment.
  • the configuration description information of the target terminal group includes but is not limited to at least one of the following:
  • Target subscription information for example, allowing to use the same EAS with other terminals.
  • Target location information includes but is not limited to at least one of the following: at least one target cell identifier; at least one target tracking area identifier; at least one IP address segment; at least one target PSA; at least one target DNAI; at least one target base station identifier.
  • At least one target FQDN the FQDN carried in the DNS query of the terminals in the target terminal group.
  • At least one target S-NSSAI At least one target S-NSSAI.
  • the configuration description information of the target terminal group may also include analysis information of the first terminal's Network Data Analysis Function (NWDAF).
  • NWDAAF Network Data Analysis Function
  • a target terminal group is determined.
  • the terminals in this group all use the same EAS IP address. Then as long as a new terminal is determined to meet the configuration description information of the target terminal group, the new terminal can be confirmed. , you also need to configure the same EAS IP address for it.
  • the method may further include: The side device obtains EAS deployment information of the target terminal group, where the EAS deployment information includes the configuration description information.
  • the EAS deployment information may also include a processing method corresponding to the target terminal group, and the processing method corresponding to the target terminal group includes one of the following:
  • the target DNS message processing rules adopted by terminals in the target terminal group are used for DNS queries of terminals in the target terminal group.
  • the first network side device determines that the first terminal belongs to the target terminal group based on the EAS deployment information.
  • the first terminal's DNS query adopts the target DNS message processing rule. For example, use the same ECS option (that is, the target ECS option), or use the same local DNS server (that is, the target local DNS server).
  • the target EAS address carried in the DNS response sent to the terminal in the target terminal group is to say, all DNS queries for terminals in the target terminal group are processed by sending a DNS response carrying the target EAS address to the terminal.
  • the first network side device determines that the first terminal belongs to the target based on the EAS deployment information. In the case of a terminal group, it is determined to adopt a processing method of sending a DNS response carrying the target EAS address to the first terminal.
  • the first network side device may obtain the EAS deployment information of the target terminal group from the third network side device.
  • the first network side device can, when idle, from The third network side device obtains the EAS deployment information of the target terminal group, or the first network side device may also obtain the EAS deployment information of the target terminal group from the third network side device after receiving the first request.
  • the first network side device obtains the EAS deployment information of the target terminal group from the third network side device, including: the first network side device uses the target information of the first terminal , obtain the EAS deployment information of the target terminal group from the third network side device.
  • the first network side device may obtain the EAS deployment information of the target terminal group from the third network side device based on the target information of the first terminal. For example, the first network side device may obtain the EAS deployment information of the target terminal group in the area (such as a cell or tracking area) where the first terminal is located from the third network side device.
  • the EAS deployment information of the target terminal group can be saved in the UDR, and the first network side device (for example, SMF) can restore this information from the UDR.
  • the SMF can send signaling to NEF: Nnef_EASDeployment_Subscribe, and NEF can obtain the target from the UDR.
  • the EAS deployment information of the terminal group is notified to SMF.
  • the method may further include: The first network side device sends a first message to the first terminal according to the EAS deployment information, where the first message carries DNS policy information, and the DNS policy information includes at least one of the following:
  • the DNS server includes at least one of the following: EASDF; that is, it is hoped that all terminals in the target terminal group will use EASDF. as the DNS server IP address without using other DNS server IP addresses.
  • Condition information which includes at least one of the following: location condition information and at least one target FQDN.
  • the DNS policy information includes the above (1) and (2), it instructs the first terminal to send the DNS query to the DNS server corresponding to the address information in (1) if the information in the condition information is satisfied. .
  • the location condition information may include at least one of the following:
  • At least one target cell identifier (1) At least one target cell identifier
  • At least one target base station identifier At least one target base station identifier.
  • the condition information is sent to the terminal, so that the terminal determines which DNS server the DNS query should be sent to based on the terminal location, the FQDN in the DNS query sent by the terminal, and the IP address segment where the UE's IP address is located. If the conditions are met, it should be sent to the EASDF corresponding to the address information in the DNS policy information, because sending to the same EASDF can ensure that the same EAS IP address is used.
  • the first network side device when the first network side device receives a request from the second network side device to indicate how to process the DNS query sent by the first terminal, the first network side device sends a request to the third network side device according to the target information of the first terminal.
  • the second network side device instructs to use a target processing method to process the DNS query sent by the first terminal.
  • the target processing method is used to select the same EAS for the first terminal as that of at least one second terminal, so that the second network side device can The first terminal and the second terminal select the same EAS to shorten the communication delay between the EAS and the first terminal and the second terminal.
  • FIG 3 shows a schematic flowchart of a DNS query response method in an embodiment of the present application.
  • the method 300 can be executed by the second network side device.
  • the method may be executed by software or hardware installed on the second network side device.
  • the second network side device may be EASDF.
  • the method may include the following steps.
  • the second network side device receives the first DNS query sent by the first terminal.
  • the second network side device sends a first request to the first network side device, where the first request is used to request the first network side device to instruct the first network side device to process the DNS query sent by the first terminal. The way.
  • the second network side device receives the instruction information sent by the first network side device, where the instruction information is used to instruct the second network side device to use a target processing method to process the DNS sent by the first terminal.
  • the query is processed, and the target processing method is used to select the same EAS for the first terminal as that of at least one second terminal.
  • the first network side device may use the description in method 200 to send the indication information to the second network side device.
  • the description in method 300 please refer to the description in method 300, which will not be described again here.
  • S316 The second network side device responds to the first DNS query using the target processing method.
  • the target processing method includes at least one of the following:
  • the target DNS message processing rules are the same as the DNS message processing rules corresponding to the at least one second terminal;
  • a target DNS response carrying a target edge application server EAS address is sent to the first terminal, where the target EAS address is the same as the EAS address selected for the at least one second terminal.
  • the second network side device adopts the target processing method to respond to the first DNS query, which may include:
  • the second network side device uses the target DNS message processing rule to send a second DNS query to a target DNS server, where the target DNS server is the same as the DNS server corresponding to the at least one second terminal;
  • the second network side device receives the first DNS response returned by the target DNS server, wherein the first DNS response carries at least one EAS address;
  • the second network side device returns the first DNS response to the first terminal.
  • the second network side device may carry a target ECS option in the second DNS query, and the target ECS option is the same as the ECS option corresponding to the at least one second terminal, or the second network side device may carry the target ECS option in the second DNS query.
  • the second DNS query carries a target local DNS server address, and the target local DNS server is a local DNS service corresponding to the at least one second terminal. server address, allowing a secondary DNS query to be sent to the target DNS server.
  • the DNS query of the first terminal is sent to the same DNS server as the second terminal, so that the same DNS server can respond to the DNS query of the first terminal and the DNS query of the second terminal,
  • the EAS address carried in the first DNS response sent to the first terminal is likely to be the same as the EAS address carried in the DNS response sent to the second terminal.
  • the first DNS response may carry one EAS address or multiple EAS addresses.
  • the first DNS response may also carry The priority corresponding to each EAS address.
  • the second network side device adopts the target processing mode, and responding to the first DNS query may include: the second network side device sends a second DNS response, wherein the second DNS response carries the target EAS address. That is, in this possible implementation, the second network side device directly sends a second DNS response to the first terminal, and the second DNS response carries the above-mentioned target EAS address.
  • the second DNS response may carry one target EAS address or multiple target EAS addresses.
  • the second DNS response may also carry the priority corresponding to each target EAS address.
  • the first terminal may respond in order from high to low priority. Access in sequence, that is to say, the first terminal can access the target EAS address with the highest priority first, and then access the target EAS address with the second highest priority if the access fails.
  • the second terminal can also access Access is performed according to the same rules, thereby ensuring that the first terminal and the second terminal access the same EAS.
  • the second network side device can respond to the DNS query of the first terminal using the same target processing method as the second terminal, thereby making it possible for the first terminal to connect with the second terminal. into the same EAS.
  • Figure 4 shows a schematic flowchart of a terminal group configuration method in an embodiment of the present application.
  • the method 400 can be executed by a fourth network side device.
  • the method may be executed by software or hardware installed on the fourth network side device.
  • the fourth network side device may be an application function (Application Function, AF) network element.
  • the method may include the following steps.
  • the fourth network side device determines the EAS deployment information of the target terminal group according to the preset rules, where the preset rules indicate that the same EAS needs to be selected for the terminals in the target terminal group.
  • its service provider can set preset rules to select the same EAS for terminals in the target terminal group.
  • the fourth network side device sends the EAS deployment information of the target terminal group to the third network side device.
  • AF can save the EAS deployment information of the target terminal group into the UDR.
  • the preset rules include but are not limited to at least one of the following:
  • the EAS deployment information of the target terminal group is the same as the EAS deployment information of the target terminal group in the above method 200.
  • the description in the method 200 please refer to the description in the method 200.
  • the EAS deployment information may include configuration description information of the target terminal group, and the configuration description information includes at least one of the following:
  • Target subscription information may include: allowing to use the same EAS with other terminals.
  • At least one target FQDN At least one target FQDN.
  • At least one target S-NSSAI At least one target S-NSSAI.
  • the target location information includes at least one of the following:
  • At least one target cell identifier (1) At least one target cell identifier
  • At least one target base station identifier At least one target base station identifier.
  • the EAS deployment information also includes a processing method corresponding to the target terminal group, and the processing method corresponding to the target terminal group includes one of the following:
  • the target DNS message processing rules include one of the following: target ECS options, target local DNS server address.
  • the method further includes:
  • the fourth network side device determines to update the target EAS address of the target terminal group, and/or the fourth network side device determines to update the target local DNS server address of the target terminal group;
  • the fourth network side device notifies the terminals in the target terminal group to re-initiate DNS query.
  • the fourth network side device may determine to update the target EAS address of the target terminal group. For example, in order to achieve EAS load balancing, the fourth network side device determines to update the target EAS address of the target terminal group, and/ Or after determining to update the target local DNS server address of the target terminal group, notify the terminals in the target terminal group to re-initiate a DNS query to relocate the EAS accessed by the terminals in the target terminal group.
  • the fourth network side device can determine the EAS deployment information of the target terminal group, and send the EAS deployment information of the target terminal group to the third network side device, so that multiple terminals can be configured to access
  • the conditions and processing methods of the same EAS facilitate processing of the terminal's DNS query when it receives the terminal's DNS query later.
  • the EAS deployment information provided by the AF can guide the SMF and EASDF to select the same EAS for the target terminal.
  • the information provided by AF is not decisive. That is, if AF does not decide to select the same EAS IP address A for a certain FQDN of a terminal in a certain location, SMF must follow this configuration.
  • FIG. 5 shows a schematic flowchart of the DNS query method in this embodiment of the present application.
  • the method 500 can be executed by the first terminal.
  • the method may be performed by software or hardware installed on the first terminal.
  • the method may include the following steps.
  • the first terminal receives the first message sent by the first network side device, where the first message carries DNS policy information.
  • the DNS policy information is the same as the DNS policy information in method 200.
  • the manner in which the first network side device sends the first message please refer to the description in method 200, which will not be described again here.
  • the DNS policy information includes at least one of the following:
  • Condition information which includes at least one of the following: location condition information and at least one target FQDN.
  • the DNS policy information includes the address information of the DNS server, it is equivalent to the first terminal saving multiple DNS server addresses.
  • the first terminal uses the DNS server, that is, A DNS query is sent to the DNS server. If the condition is not met, a local DNS server is used, that is, a DNS query is sent to the local DNS server.
  • the location condition information includes at least one of the following:
  • At least one target cell identifier At least one target cell identifier
  • At least one target PSA At least one target PSA
  • At least one target base station identifier At least one target base station identifier.
  • the first terminal sends a DNS query to a DNS server according to the DNS policy information; wherein the DNS server includes EASDF.
  • the first terminal sends a request to the DNS server based on the DNS policy information.
  • a DNS server sending a DNS query can include the following steps:
  • Step 1 The first terminal compares the target information of the first terminal with the condition information
  • Step 2 When it is determined that the target information of the first terminal satisfies at least one of the condition information, the first terminal sends a DNS query to the second network side device;
  • the target information of the first terminal satisfying at least one of the condition information includes at least one of the following:
  • the target information of the first terminal is the same as at least one item of the condition information; for example,
  • the target information of the first terminal is within the scope of at least one item of the condition information.
  • the target information of the first terminal includes at least one of the following:
  • the location information of the first terminal is the location information of the first terminal.
  • the location information of the first terminal includes at least one of the following: a cell identity accessed by the first terminal, a tracking area where the first terminal is located, and an IP address of the first terminal. Address, PDU session anchor PSA serving the first terminal, data network access identifier DNAI of the first terminal, and base station identifier accessed by the first terminal.
  • the target information of the first terminal when the target information of the first terminal is compared with the condition information, it can be determined whether the target information of the first terminal satisfies the condition information. For example, if the condition information includes multiple FQDNs, and if the FQDN in the DNS query of the first terminal is the same as one of the multiple FQDNs, it is determined that the target information of the first terminal satisfies the condition information. For another example, if the configuration description information of the target terminal group includes a target cell identifier, and the cell identifier of the first terminal is the same as the target cell identifier, it is determined that the target information of the first terminal satisfies the condition information. For another example, the condition information may include an IP address segment. If the IP address of the first terminal is within the IP address segment, it is determined that the target information of the first terminal satisfies the condition information.
  • the method may further include the following steps:
  • Step 1 The first terminal receives a DNS response returned by the second network side device, where the DNS response carries at least one EAS address;
  • the second network side device may send a DNS response to the first terminal in the manner described in the above method 300.
  • the DNS response may include the first DNS response or the second DNS response in the method 300.
  • Step 2 The first terminal accesses the EAS corresponding to one of the at least one EAS address.
  • the DNS response may carry an EAS address. Then, after receiving the DNS response, the first terminal directly accesses the EAS corresponding to the EAS address.
  • the DNS response may also carry multiple EAS addresses and priorities corresponding to each of the EAS addresses.
  • the first terminal may access any one of the EASs, or the first terminal may The terminal accessing the EAS corresponding to one of the at least one EAS address may also include: the first terminal first accesses the one with a higher priority according to the priorities corresponding to the multiple EAS addresses. The EAS corresponding to the EAS address.
  • the method further includes: when the target information of the first terminal is changed.
  • the first terminal re-sends the DNS query to the DNS server according to the DNS policy information. For example, if the location of the first terminal changes, the first terminal can re-send a DNS query to the DNS server according to the DNS policy information.
  • SMF considers that the same EAS should be selected for the DNS query of a group of UEs or the same DNS message handling rule (DNS message handling rule) should be selected.
  • DNS message handling rule The conditions and indicators of UEs considered by SMF are as follows:
  • UE location When the UE location is close, it is deemed to have selected the same EAS service. Among them, the UEs can be considered to be in close proximity under the following conditions:
  • UE accesses from a group of RAN (for example, TAI list, cell ID, NR Node B Identifier, gNB ID), especially venue services, which are accessed through several nearby base stations. Coming in, it can be regarded as a set of terminals.
  • RAN for example, TAI list, cell ID, NR Node B Identifier, gNB ID
  • the PDU Session Anchor (PSA) serving the UE is the same. Because if the UPF serving multiple UEs is the same UPF, multiple UEs are considered to access the same DN.
  • PSA PDU Session Anchor
  • NWDAF Network Data Analytics Function
  • the SMF should configure the DNS queries of these UEs as follows:
  • Figure 6 shows another schematic flowchart of the DNS query response method provided by the embodiment of the present application. As shown in Figure 6, the method 600 mainly includes the following steps.
  • S601a Select EASDF for the UE. In this step, you can select the same EASDF for multiple terminals to ensure that the same EAS IP address can be used.
  • S601b The terminal sends a DNS query, which includes: UE IP address and FQDN.
  • EASDF After EASDF receives the DNS query from the terminal, it sends Neasdf_DNSContext_Notify Request to SMF to notify SMF of the FQDN to be queried, and also requests SMF to issue DNS message handling rules.
  • the processing rule described is mainly that SMF instructs EASDF to which DNS server the DNS query should be sent.
  • S603 SMF sends a response indicating receipt of the EASDF request.
  • S604 starts to S611 and collects the target information of the UE for the SMF. Through this information, the SMF can determine that the DNS query for this terminal needs to use the same set of DNS message handling rules as for other UEs.
  • SMF obtains the UE's subscription data from UDM.
  • S604 SMF sends Nudm_SDM_Get or Nudm_SDM_Subscribe to restore the terminal's subscription information, where the input parameters include: UE SUPI.
  • the contract information means that the current terminal can use the value-added services provided by the operator, that is, the same EAS IP address can be selected for the terminal.
  • the UDM can send the UE's subscription information to the SMF.
  • the subscription information of the UE saved by UDM is: Only when the current UE is authorized to use the same EAS can SMF optimize it.
  • SMF obtains the location of the UE from the AMF.
  • the location of this UE is mainly the location of the UE on the RAN side. If several terminals access 5GC or EASDF from a RAN or a set of specified RANs, SMF can regard these terminals as being within a location range and configure the same DNS message handling rule for them.
  • S609 AMF sends the UE's location to SMF.
  • the most important location information is: Cell ID and TAI.
  • the UE's location can be sent to SMF through signaling Namf_EventExposure_Notify.
  • SMF can set a rule. For example, when the UE location of the UE, such as cell ID or TAI, etc., is within a range, these UEs are deemed to be able to use the same EAS.
  • the identifier of the base station accessed by the terminal for example, gNB ID, can also be provided as location information.
  • the SMF determines the UPF ID (for example, PSA ID) and DNAI of the serving UE.
  • SMF can directly obtain this information without searching for other network elements.
  • S611 After the SMF collects the target information of the UE, the SMF executes the decision rules to determine whether the same DNS message processing rules need to be configured for the terminal or the same DNS response needs to be sent.
  • S612 When the SMF determines that it is necessary to select the same DNS message handling rule for the UE's DNS query as that of other terminals, the SMF sends an update to the EASDF to update the The rules for this DNS query of the UE: use the same ECS option or the same local DNS server IP address.
  • SMF can use signaling: Neasdf_DNSContext_Update Request (DNS message handling rules), which can carry:
  • the baseline DNS handling actions ID (Baseline DNS handling actions ID) can include:
  • Using the same DNS message processing rules is an implementation method for selecting the same EAS.
  • EASDF sends the UE's DNS query to the DNS server in a rule.
  • these DNS queries of all UEs that meet the conditions are sent to the same DNS server with the same DNS message handling rule.
  • the DNS server returns a DNS response to the EASDF, where the EAS IP addresses carried in the DNS responses returned by the DNS server to all UEs that meet the conditions are the same.
  • the DNS response can carry multiple EAS IP addresses, each IP address corresponds to a priority, and the UE can access one by one according to the priority.
  • EASDF sends a Neasdf_DNSContext_Notify request to SMF. This request is used to notify SMF of the DNS query for the terminal and the returned DNS response. The main purpose is to report the EAS IP address to SMF.
  • SMF returns Neasdf_DNSContext_Notify response to EASDF.
  • SMF when the EAS IP address is determined, SMF selects PSA.
  • EASDF sends a DNS response to the UE.
  • the SMF can indicate DNS message processing rules to multiple EASDFs. Then, multiple EASDFs share this processing rule to ensure that the same EAS is selected or used for multiple terminals.
  • Figure 7 shows another schematic flow chart of the DNS query response method provided by the embodiment of the present application. As shown in Figure 7, the method 700 mainly includes the following steps.
  • S701a-S710 the same as S601a-S610.
  • the SMF determines based on the conditions that the UE's DNS query directly feeds back the EAS IP address and directly feeds back the DNS response, that is, there is no need to query the DNS server.
  • SMF sends an update to EASDF, instructing EASDF to directly send a DNS response to the UE, and at the same time, sends the EAS IP address to EASDF. At this time, SMF needs to specify which EAS IP address to send to the terminal in the DNS response. The specific EAS IP address to choose can be decided by SMF.
  • SMF instructs EASDF how to handle the UE's DNS query. Since the UE is different from other The UE needs to use an EAS, so just send the IP address directly to the UE, which is regarded as querying the same EAS.
  • EASDF sends a DNS response to the UE, and the DNS response carries the EAS IP address indicated by SMF.
  • the SMF can instruct multiple EASDFs on the processing method of sending DNS responses.
  • Figure 8 shows another schematic flowchart of the terminal group configuration method in the embodiment of the present application. As shown in Figure 8, the method 800 mainly includes the following steps.
  • S801 AF provides information such as the location or FQDN of a specific UE, indicating the DNS message handling rule (DNS message handling rule) or EAS IP address.
  • DNS message handling rule DNS message handling rule
  • EAS IP address EAS IP address
  • AF considers that DNS queries for a group of UEs should select the same EAS or use the same DNS message handling rule.
  • the DNS queries include the same FQDN, or the terminals are in the same location.
  • AF provides target DNS message handling rules (DNS message handling rules) or target EAS IP addresses. Specifically, AF can set the following conditions:
  • UE location When the UE location is close, it is deemed to have selected the same EAS service. Among them, the UEs can be considered to be in close proximity under the following conditions:
  • UE accesses from a group of RAN (for example, TAI list, cell ID), especially venue services. It accesses through several nearby base stations and can be regarded as a group of terminals.
  • a group of RAN for example, TAI list, cell ID
  • the PDU Session Anchor (PSA) serving the UE is the same. Because if the UPF serving multiple UEs is the same UPF, multiple UEs are considered to access the same DN.
  • PSA PDU Session Anchor
  • NWDAF Network Data Analytics Function
  • AF provides the corresponding configuration as follows:
  • -Target DNS message processing rules (mainly the mechanism for forwarding DNS queries, including: using the same ECS option; or forwarding DNS queries to the same local DNS server IP)
  • the DNS response includes the same EAS that these endpoints should use.
  • NEF saves the information sent by AF (called the EAS deployment information of the terminal group in this application, and may also be called other information names) to the UDR.
  • EAS deployment information of the terminal group in this application and may also be called other information names
  • NEF can save this information to UDR through signaling: Nudr_DM_Create or Nudr_DM_Update.
  • the storage format is as shown in Table 1. Of course, it is not limited to this, as long as the storage location can be clearly defined.
  • NEF sends a response to AF.
  • SMF can recover this information from the UDR, and then decide based on this information whether the same EAS or the same DNS message processing rules need to be selected for DNS queries of some UEs.
  • S806 SMF restores the information in the UDR, that is, obtains the above saved information from the UDR.
  • SMF can use the signaling: Nnef_EASDeployment_Subscribe to NEF to obtain the above information from the UDR.
  • SMF can restore the information in the UDR when receiving a request for a processing method for a DNS query sent by EASDF. For example, SMF can obtain the EAS IP address or processing rules in the area where the terminal that sends the DNS query is located.
  • SMF can also restore the information in the UDR when it is idle.
  • NEF notifies SMF of the above information.
  • NEF notifies SMF of the above information through Nnef_EASDeployment_Notify. That is, after SMF subscribes to NEF, let NEF obtain the above information from UDR.
  • S809 SMF sends a notification response to AF.
  • SMF obtains the target DNS message processing rule or target EAS IP address corresponding to specific conditions (for example, specific region, specific FQDN).
  • Figure 9 shows a flow chart of the DNS query method in the embodiment of the application.
  • the execution process of the UE is optimized, so that the UE can distinguish the DNS query that needs to be sent to the EASDF based on FQDN, etc., And DNS queries that need to be sent directly to the local DNS server.
  • the method 900 mainly includes the following steps.
  • S901a Optionally, establish a PDU session of the UE.
  • the uplink classifier (UL CL)/branching point (Branching point, BP) is inserted into the local DNS server that the UE can access locally.
  • SMF sends the following content to the UE (or UE operating system (OS), UE EDC, edge discovery function (edge discovery function)) through the NAS message: condition information, for example, at least one target FQDN, UE location condition Information and EASDF IP address, etc.
  • condition information for example, at least one target FQDN, UE location condition Information and EASDF IP address, etc.
  • SMF tells the UE that when the UE is in this location and the DNS sent by the UE
  • the UE (or EDC) needs to send the DNS query to EASDF instead of the local DNS server.
  • EASDF is used
  • the local DNS server is used.
  • the local DNS server is used. This ensures that all qualified terminals send DNS queries to the same server.
  • a local DNS server is used.
  • the SMF needs to be configured with an N4 rule for the UL CL before S902 is given to the UE: when the UE sends a DNS query with the destination IP address to EASDF, the UL CL routes the DNS query to EASDF (via C-PSA routing, that is, central user plane routing).
  • the UE returns a response to the SMF.
  • the UE's DNS query is sent to the L-PSA through UL CL/BP, and then sent to the local DNS server, and the local DNS server provides feedback.
  • the UE's DNS query is sent to C-PSA through UL CL/BP, and then sent to EASDF, and EASDF provides feedback according to the method described in the above method 600 or method 700 embodiment. .
  • FIG. 10 shows a schematic flow chart of an EAS switching method in an embodiment of the present application. As shown in Figure 10, the method mainly includes the following steps.
  • an EAS IP address can be discovered for the UE through the method described in the above method 600 or method 700 embodiment.
  • the UE and the EAS previously performed uplink transmission (the source IP address is the IP address of the UE, and the target IP address is the source EAS IP address) and downlink transmission (the source IP address is the source EAS IP address, and the target IP address is the UE) through the remote PSA. IP address).
  • AF or 5G core network (5GC) triggers the EAS IP address replacement process.
  • UPF replaces the source EAS IP address in the uplink transmission sent by the UE with the new EAS IP address, and replaces the new EAS IP address in the downlink transmission with the source EAS IP address.
  • EAS relocation can also be performed. For example, if AF triggers relocation (relocation), for example, EAS load balancing, you can AF update the IP address of EAS to 5GC; then, let the UE perform a DNS query again, and then The description of the method 600 or the method 700 embodiment may be used to select an EAS for the UE. For another example, if the UE moves and triggers relocation, the UE can query DNS after arriving at the new location, and then use method 600 or 700 to use new DNS message processing rules or EAS IP addresses.
  • relocation for example, EAS load balancing
  • the description of the method 600 or the method 700 embodiment may be used to select an EAS for the UE.
  • the UE can query DNS after arriving at the new location, and then use method 600 or 700 to use new DNS message processing rules or EAS IP addresses.
  • This method illustrates that AF provides an EAS IP address to replace the destination EAS IP addresses of multiple terminals. This also enables the selection of the same EAS for multiple terminals to a certain extent.
  • the execution subject may be an instructing device for edge application server selection.
  • the instruction device for edge application server selection is used as an example to illustrate the instruction method for edge application server selection.
  • Figure 11 shows a schematic structural diagram of an edge application server selection instructing device provided by an embodiment of the present application.
  • the device mainly includes: a first receiving module 1101 and a first sending module 1102.
  • the first receiving module 1101 is used to receive a first request sent by a second network side device, wherein the first request is used to request the first network side device to instruct the first terminal to send The way to process DNS queries of the domain name system; the first sending module 1102 is configured to send indication information to the second network side device according to the target information of the first terminal, wherein the indication information is used to indicate the
  • the second network side device uses a target processing method to process the DNS query sent by the first terminal.
  • the target processing method is used to select the same EAS for the first terminal as that of at least one second terminal.
  • the target processing method Including one of the following: using target DNS message processing rules, the target DNS message processing rules are the same as the DNS message processing rules corresponding to the at least one second terminal; sending a target carrying the EAS address of the target edge application server to the first terminal DNS response, the target EAS address is the same as the EAS address selected for the at least one second terminal.
  • the target information of the first terminal includes at least one of the following:
  • the location information of the first terminal is the location information of the first terminal.
  • the data network name DNN accessed by the first terminal
  • the data network DN accessed by the first terminal
  • the subscription information of the first terminal includes: a first indication, the first indication is used to indicate that the first terminal is allowed to use the same EAS with at least one second terminal.
  • the location information of the first terminal includes at least one of the following: a cell identity accessed by the first terminal, a tracking area where the first terminal is located, and an IP address of the first terminal. Address, PDU session anchor PSA serving the first terminal, data network access identifier DNAI of the first terminal, and base station identifier accessed by the first terminal.
  • the first FQDN and the second FQDN are the same, wherein the first FQDN is the FQDN in the DNS query of the first terminal, and the second FQDN is the at least one first FQDN. 2.
  • the target DNS message processing rules include one of the following:
  • the target DNS response carries at least one of the following: at least one target EAS address and a priority corresponding to each target EAS address.
  • the first sending module 1102 sends indication information to the second network side device, including:
  • the first receiving module 1101 is further configured to: the first network side device obtains the target information of the first terminal.
  • the first sending module 1102 determines to select the same EAS for the first terminal as the at least one second terminal according to the target information of the first terminal, including:
  • the first sending module 1102 determines that the first terminal belongs to the target terminal group according to the target information of the first terminal, including:
  • the target information of the first terminal satisfies at least one item of the configuration description information of the target terminal group including at least one of the following:
  • the target information of the first terminal is the same as at least one item of the configuration description information of the target terminal group;
  • the target information of the first terminal is located within the scope of at least one item of configuration description information of the target terminal group.
  • the configuration description information of the target terminal group includes at least one of the following:
  • At least one target FQDN At least one target FQDN
  • At least one target DNN At least one target DNN
  • At least one target S-NSSAI At least one target S-NSSAI.
  • the target subscription information includes: allowing the user to use the same EAS with other terminals.
  • the target location information includes at least one of the following:
  • At least one target cell identifier At least one target cell identifier
  • At least one target PSA At least one target PSA
  • At least one target base station identifier At least one target base station identifier.
  • the first receiving module 1101 is also configured to obtain EAS deployment information of the target terminal group, where the EAS deployment information includes the configuration description information.
  • the EAS deployment information also includes a processing method corresponding to the target terminal group, and the processing method corresponding to the target terminal group includes one of the following:
  • the first receiving module 1101 obtains the EAS deployment information of the target terminal group, including:
  • the first receiving module 1101 obtains the EAS deployment information of the target terminal group from the third network side device, including:
  • the first sending module 1102 is also used to:
  • a first message is sent to the first terminal, wherein the first message carries DNS policy information, and the DNS policy information includes at least one of the following:
  • Address information of the DNS server instructing the first terminal to send a DNS query to the DNS server, where the DNS server includes at least one of the following: EASDF;
  • Condition information includes at least one of the following: location condition information, at least one target FQDN.
  • the location condition information includes at least one of the following:
  • At least one target cell identifier At least one target cell identifier
  • At least one target PSA At least one target PSA
  • At least one target base station identifier At least one target base station identifier.
  • Figure 12 shows a schematic structural diagram of a DNS query response device provided by an embodiment of the present application.
  • the device 1200 mainly includes: a second receiving module 1201, a second sending module 1202 and a response module 1203.
  • the second receiving module 1201 is used to receive the first DNS query sent by the first terminal; the second sending module is used to send the first request to the first network side device, wherein the The first request is used to request the first network side device to instruct the DNS query sent by the first terminal.
  • the second receiving module 1201 is also used to receive the instruction information sent by the first network side device, wherein the instruction information is used to instruct the second network side device to use the target processing method to process the query.
  • the DNS query sent by the first terminal is processed, and the target processing method is used to select the same EAS for the first terminal as that of at least one second terminal; the response module 1203 is used to use the target processing method to process the Respond to the first DNS query; wherein the target processing method includes at least one of the following: using target DNS message processing rules, the target DNS message processing rules are the same as the DNS message processing rules corresponding to the at least one second terminal;
  • the first terminal sends a target DNS response carrying a target edge application server EAS address, where the target EAS address is the same as the EAS address selected for the at least one second terminal.
  • the response module 1203 adopts the target processing method to respond to the first DNS query, including:
  • target DNS message processing rules send a second DNS query to a target DNS server, where the target DNS server is the same as the DNS server corresponding to the at least one second terminal;
  • the second network side device returns the first DNS response to the first terminal.
  • the second DNS query carries a target ECS option, and the target ECS option is the same as the ECS option corresponding to the at least one second terminal, or the second DNS query carries There is a target local DNS server address, and the target local DNS server is the same as the local DNS server address corresponding to the at least one second terminal.
  • the first DNS response carries multiple EAS addresses and priorities corresponding to each of the EAS addresses.
  • the response module 1203 uses the target processing method to respond to the first DNS query, including: sending a second DNS response to the first terminal, where the second DNS response contains the target EAS address.
  • Figure 13 shows a schematic structural diagram of a terminal group configuration method provided by an embodiment of the present application.
  • the device 1300 mainly includes: a determination module 1301 and a third sending module 1302.
  • the determination module 1301 is configured to determine the EAS deployment information of the target terminal group according to preset rules, wherein the preset rules indicate that the same EAS needs to be selected for the terminals in the target terminal group;
  • the third sending module 1302 is configured to send the EAS deployment information of the target terminal group to the third network side device.
  • the preset rules include at least one of the following:
  • the EAS deployment information includes configuration description information of the target terminal group, and the configuration description information includes at least one of the following:
  • At least one target FQDN At least one target FQDN
  • At least one target DNN At least one target DNN
  • At least one target S-NSSAI At least one target S-NSSAI.
  • the target location information includes at least one of the following:
  • At least one target cell identifier At least one target cell identifier
  • At least one target PSA At least one target PSA
  • At least one target base station identifier At least one target base station identifier.
  • the target subscription information includes: allowing the user to use the same EAS with other terminals.
  • the EAS deployment information also includes a processing method corresponding to the target terminal group, and the processing method corresponding to the target terminal group includes one of the following:
  • the target DNS message processing rules include one of the following: target ECS options, target local DNS server address.
  • the determination module 1301 is also used to:
  • Figure 14 shows a schematic structural diagram of a DNS query device provided by an embodiment of the present application.
  • the device is applied to a first terminal.
  • the device 1400 mainly includes: a third receiving module 1401, used to receive the first The first message sent by the network side device, wherein the first message carries DNS policy information; the fourth sending module 1402 is used to send a DNS query to the DNS server according to the DNS policy information; wherein the DNS The server includes EASDF.
  • the DNS policy information includes at least one of the following:
  • the address information of the DNS server is the address information of the DNS server.
  • Condition information includes at least one of the following: location condition information, at least one target FQDN.
  • the fourth sending module 1402 sends a DNS query to the DNS server according to the DNS policy information, including:
  • the target information of the first terminal satisfying at least one of the condition information includes at least one of the following:
  • the target information of the first terminal is the same as at least one item of the condition information
  • the target information of the first terminal is within the scope of at least one item of the condition information.
  • the location condition information includes at least one of the following:
  • At least one target cell identifier At least one target cell identifier
  • At least one target PSA At least one target PSA
  • At least one target base station identifier At least one target base station identifier.
  • the target information of the first terminal includes at least one of the following:
  • the location information of the first terminal is the location information of the first terminal.
  • the location information of the first terminal includes at least one of the following: a cell identity accessed by the first terminal, a tracking area where the first terminal is located, and an IP address of the first terminal. Address, PDU session anchor PSA serving the first terminal, data network access identifier DNAI of the first terminal, and base station identifier accessed by the first terminal.
  • the third receiving module 1401 is also configured to receive a DNS response returned by the second network side device, wherein the DNS response carries at least one EAS address; access and the at least one The EAS corresponding to one of the EAS addresses.
  • the DNS response carries multiple EAS addresses and priorities corresponding to each of the EAS addresses.
  • the third receiving module 1401 accesses the EAS corresponding to one of the at least one EAS address, including: priority access according to the priorities corresponding to the multiple EAS addresses.
  • the fourth sending module 1402 is also configured to re-send the first terminal to the DNS server according to the DNS policy information when the target information of the first terminal changes. DNS query.
  • this embodiment of the present application also provides a communication device 1500, which includes a processor 1501 and a memory 1502.
  • the memory 1502 stores programs or instructions that can be run on the processor 1501, such as , when the communication device 1500 is a network-side device, when the program or instruction is executed by the processor 1501, it implements each step of the above-mentioned edge application server selection instruction method embodiment, or implements each step of the above-mentioned DNS query response method embodiment, Or implement each step of the above terminal group configuration method embodiment, and achieve the same technical effect.
  • the communication device 1500 is a terminal, when the program or instruction is executed by the processor 1501, each step of the above DNS query method embodiment is implemented, and the same technical effect can be achieved. To avoid duplication, it will not be repeated here. Repeat.
  • An embodiment of the present application also provides a terminal, including a processor and a communication interface.
  • the processor is used to implement each step of the above DNS query method embodiment, and the communication interface is used to communicate with external devices.
  • This terminal embodiment corresponds to the above-mentioned terminal-side method embodiment.
  • Each implementation process and implementation manner of the above-mentioned method embodiment can be applied to this terminal embodiment, and can achieve the same technical effect.
  • FIG. 16 is a schematic diagram of the hardware structure of a terminal that implements an embodiment of the present application.
  • the terminal 1600 includes but is not limited to: a radio frequency unit 1601, a network module 1602, an audio output unit 1603, an input unit 1604, a sensor 1605, a display unit 1606, a user input unit 1607, an interface unit 1608, a memory 1609, a processor 1610, etc. At least some parts.
  • the terminal 1600 may also include a power supply (such as a battery) that supplies power to various components.
  • the power supply may be logically connected to the processor 1610 through a power management system, thereby managing charging, discharging, and power consumption through the power management system. Management and other functions.
  • the terminal structure shown in FIG. 16 does not constitute a limitation on the terminal.
  • the terminal may include more or fewer components than shown in the figure, or some components may be combined or arranged differently, which will not be described again here.
  • the input unit 1604 may include a graphics processing unit (Graphics Processing Unit, GPU) 16041 and a microphone 16042.
  • the graphics processor 16041 is responsible for the image capture device (GPU) in the video capture mode or the image capture mode. Process the image data of still pictures or videos obtained by cameras (such as cameras).
  • the display unit 1606 may include a display panel 16061, which may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like.
  • the user input unit 1607 includes a touch panel 16071 and at least one of other input devices 16072. Touch panel 16071, also known as touch screen.
  • the touch panel 16071 may include two parts: a touch detection device and a touch controller.
  • Other input devices 16072 may include but are not limited to physical keyboards, function keys (such as volume control keys, switch keys, etc.), trackballs, mice, and joysticks, which will not be described again here.
  • the radio frequency unit 1601 after receiving downlink data from the network side device, the radio frequency unit 1601 can transmit it to the processor 1610 for processing; in addition, the radio frequency unit 1601 can send uplink data to the network side device.
  • the radio frequency unit 1601 includes, but is not limited to, an antenna, amplifier, transceiver, coupler, low noise amplifier, duplexer, etc.
  • Memory 1609 may be used to store software programs or instructions as well as various data.
  • the memory 1609 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instructions required for at least one function (such as a sound playback function, Image playback function, etc.) etc.
  • memory 1609 may include volatile memory or nonvolatile memory, or memory 1609 may include both volatile and nonvolatile memory.
  • the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electrically removable memory. Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory.
  • Volatile memory can be random access memory (Random Access Memory, RAM), static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDRSDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synch link DRAM) , SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DRRAM).
  • RAM Random Access Memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM Double Data Rate SDRAM
  • DDRSDRAM double data rate synchronous dynamic random access memory
  • Enhanced SDRAM, ESDRAM enhanced synchronous dynamic random access memory
  • Synch link DRAM synchronous link dynamic random access memory
  • SLDRAM direct memory bus
  • the processor 1610 may include one or more processing units; optionally, the processor 1610 integrates an application processor and a modem processor, where the application processor mainly handles operations related to the operating system, user interface, application programs, etc., Modem processors mainly process wireless communication signals, such as baseband processors. It can be understood that the above modem processor may not be integrated into the processor 1610.
  • the radio frequency unit 1601 is configured to receive the first message sent by the first network side device, where the first message carries DNS policy information;
  • the processor 1610 is configured to send a DNS query to a DNS server according to the DNS policy information; wherein the DNS server includes EASDF.
  • Embodiments of the present application also provide a network-side device, including a processor and a communication interface.
  • the processor is used to implement each step of the above-mentioned edge application server selection instruction method embodiment, or to implement each step of the above-mentioned DNS query response method embodiment. , or implement each step of the above terminal group configuration method embodiment, and the communication interface is used to communicate with external devices.
  • This network-side device embodiment corresponds to the above-mentioned network-side device method embodiment.
  • Each implementation process and implementation manner of the above-mentioned method embodiment can be applied to this network-side device embodiment, and can achieve the same technical effect.
  • the embodiment of the present application also provides a network side device.
  • the network side device 1700 includes: a processor 1701, a network interface 1702, and a memory 1703.
  • the network interface 1702 is, for example, a common public radio interface (CPRI).
  • CPRI common public radio interface
  • the network side device 1700 in this embodiment of the present invention also includes: instructions or programs stored in the memory 1703 and executable on the processor 1701.
  • the processor 1701 calls the instructions or programs in the memory 1703 to execute the instructions shown in Figures 11-13. It shows the execution method of each module and achieves the same technical effect. To avoid duplication, it will not be repeated here.
  • Embodiments of the present application also provide a readable storage medium, the readable storage medium stores a program or instructions, and when the program or instructions are executed by the processor, each process of the above edge application server selection instruction method embodiment is implemented. Either implement each process of the above DNS query response method embodiment, or implement each process of the above terminal group configuration method embodiment, or implement each process of the above DNS query method embodiment, and achieve the same technical effect. In order to avoid Repeat, I won’t go into details here.
  • the processor is the processor in the terminal described in the above embodiment.
  • the readable storage medium includes computer readable storage media, such as computer read-only memory ROM, random access memory RAM, magnetic disk or optical disk, etc.
  • An embodiment of the present application further provides a chip.
  • the chip includes a processor and a communication interface.
  • the communication interface is coupled to the processor.
  • the processor is used to run programs or instructions to implement the above instructions for edge application server selection.
  • Each process of the method embodiment, or implementing the above DNS query Each process of the response method embodiment, or each process of the above terminal group configuration method embodiment, or each process of the above DNS query method embodiment, and can achieve the same technical effect, to avoid duplication, will not be repeated here. Repeat.
  • chips mentioned in the embodiments of this application may also be called system-on-chip, system-on-a-chip, system-on-chip or system-on-chip, etc.
  • Embodiments of the present application further provide a computer program/program product.
  • the computer program/program product is stored in a storage medium.
  • the computer program/program product is executed by at least one processor to implement the above-mentioned selection of the edge application server.
  • Embodiments of the present application also provide a DNS query system, including: a terminal and a network-side device.
  • the terminal can be used to execute the steps of the DNS query method as described above.
  • the network-side device can be used to execute the above-mentioned edge application server.
  • the methods of the above embodiments can be implemented by means of software plus the necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is better. implementation.
  • the technical solution of the present application can be embodied in the form of a computer software product that is essentially or contributes to the existing technology.
  • the computer software product is stored in a storage medium (such as ROM/RAM, disk , optical disk), including several instructions to cause a terminal (which can be a mobile phone, computer, server, air conditioner, or network-side device, etc.) to execute the method described in various embodiments of this application.

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

Abstract

La présente demande appartient au domaine des communications sans fil. L'invention divulgue un procédé d'indication pour la sélection d'un serveur d'application périphérique (EAS), ainsi qu'un terminal et un dispositif côté réseau. Le procédé d'indication pour la sélection d'un serveur EAS dans les modes de réalisation de la présente demande comprend les étapes suivantes : un premier dispositif côté réseau reçoit une première demande qui est envoyée par un second dispositif côté réseau, la première demande étant utilisée pour demander au premier dispositif côté réseau d'indiquer un mode de traitement d'une interrogation de serveur DNS qui est envoyée par un premier terminal ; et le premier dispositif côté réseau envoie des informations d'indication au second dispositif côté réseau selon des informations cibles du premier terminal, les informations d'indication étant utilisées pour ordonner au second dispositif côté réseau de traiter, dans un mode de traitement cible, l'interrogation de serveur DNS qui est envoyée par le premier terminal, et le mode de traitement cible étant utilisé pour sélectionner, pour le premier terminal, un serveur EAS qui est le même que celui d'au moins un second terminal.
PCT/CN2023/084380 2022-03-28 2023-03-28 Procédé d'indication pour la sélection d'un serveur d'application périphérique, ainsi que terminal et dispositif côté réseau WO2023185836A1 (fr)

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