WO2023011210A1 - 一种获取边缘服务的方法和装置 - Google Patents

一种获取边缘服务的方法和装置 Download PDF

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Publication number
WO2023011210A1
WO2023011210A1 PCT/CN2022/107148 CN2022107148W WO2023011210A1 WO 2023011210 A1 WO2023011210 A1 WO 2023011210A1 CN 2022107148 W CN2022107148 W CN 2022107148W WO 2023011210 A1 WO2023011210 A1 WO 2023011210A1
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Prior art keywords
network element
dns
service discovery
information
discovery function
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PCT/CN2022/107148
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English (en)
French (fr)
Inventor
魏鑫鹏
朱奋勤
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华为技术有限公司
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Publication of WO2023011210A1 publication Critical patent/WO2023011210A1/zh

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    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/51—Discovery or management thereof, e.g. service location protocol [SLP] or web services

Definitions

  • the present application relates to the communication field, and more specifically, to a method and device for obtaining edge services.
  • a terminal device To use edge services, a terminal device first needs to obtain the address information of an edge application server (EAS) through a DNS-based service discovery mechanism.
  • obtaining the address information of the EAS by the terminal device includes the following steps: the terminal device can send a DNS query request to the edge application server discovery function (EASDF) to obtain the address information of the EAS, and the query request It may include the identification information of the EAS; EASDF sends the DNS query to the DNS server to obtain the DNS response corresponding to the service, and sends a DNS information report to the SMF according to the response, so that the SMF completes the establishment of the data plane path of the terminal device; finally, the EASDF sends The terminal device sends a DNS response message, which includes the address information of the EAS.
  • EASDF edge application server discovery function
  • the same edge service may involve more than one EAS identification information. Therefore, when the terminal device accesses the business, it will send multiple DNS query requests at the same time.
  • EASDF sends multiple DNS query requests to the DNS server and Receiving multiple DNS responses may trigger the EASDF to initiate multiple DNS information reports to the SMF, so that the SMF completes the data plane path establishment of the terminal device. Since the EAS in the returned results of these DNS responses is usually in the same data network (data network, DN), it is only necessary for the SMF to complete the data plane path establishment of the terminal device once. Therefore, the existing methods for obtaining edge services may cause waste of signaling resources.
  • the present application provides a method and device for obtaining edge services, which can save signaling overhead in the process of obtaining edge services.
  • a method for obtaining an edge service comprising: a network element with a service discovery function receives multiple DNS response messages sent by a DNS server, and the multiple DNS response messages include address information of an EAS to be queried by a terminal device; The network element with the service discovery function determines to send a DNS information report to the first core network element for the plurality of DNS response messages according to the first indication information.
  • the service discovery function network element can receive multiple DNS response messages, and the multiple DNS response messages may include multiple EAS address information corresponding to the same data network, and the service discovery function network element can be based on the first One indication information is determined to be multiple DNS response messages and only one DNS information report is sent to the network element of the first core network, thereby saving signaling overhead when querying address information of multiple EASs.
  • the network element of the first core network is a network element with a session management function
  • the network element with a service discovery function is a network element with an edge application service discovery function
  • the first indication information includes correspondence relationship information between network addresses and data network identification information
  • the network element with the service discovery function uses the first indication information and the multiple The EAS address information in the DNS response message determines that the EAS to be queried corresponds to the same data network identification information; the service discovery function network element reports once to the first core network network element one of the multiple DNS response messages corresponds to DNS information report.
  • the service discovery function caches the multiple DNS response messages; the service discovery function receives second indication information sent by the first core network element, and the second The indication information includes processing rules for the plurality of DNS response messages; the service discovery function determines to send the plurality of DNS response messages to the terminal device according to the second indication information.
  • the method before the network element with the service discovery function receives multiple DNS response messages sent by the DNS server, the method further includes: the network element with the service discovery function receives the DNS response message from the first core The first indication information sent by the network element.
  • the identification information of the data network includes at least one of the following information:
  • the data network access identifier DNAI of the data network the data network name DNN of the data network.
  • a method for obtaining an edge service includes first indication information sent by a network element of a first core network to a network element with a service discovery function, where the first indication information is used to indicate the network element with a service discovery function Sending a DNS information report to the first core network element for multiple DNS response messages, the multiple DNS response messages including the address information of the EAS to be queried by the terminal device; the first core network element receives the DNS information report.
  • the service discovery function network element can receive multiple DNS query messages, and the multiple DNS query messages may include identification information of multiple EASs corresponding to the same data network, and the service discovery function network element can according to The third indication information determines that multiple DNS query messages send a DNS information report to the network element of the first core network only once, thereby saving signaling overhead when querying address information of multiple EASs.
  • the first indication information includes correspondence relationship information between network addresses and data network identification information.
  • the first core network element sends second indication information to the service discovery function network element, where the second indication information includes information about the multiple DNS response messages Processing rules, so that the service discovery function determines to send the plurality of DNS response messages to the terminal device according to the second indication information.
  • the identification information of the data network includes at least one of the following information:
  • the data network access identifier DNAI of the data network the data network name DNN of the data network.
  • a method for obtaining edge services includes a service discovery function network element receiving a plurality of DNS query messages from a terminal device, and the plurality of DNS query messages are used to query the address information of the EAS; the service discovery function The network element determines to send a DNS information report to the network element of the first core network for the plurality of DNS query messages according to the third indication information.
  • the third indication information includes correspondence relationship information between EAS identification information and data network identification information, and the service discovery function network element determines the Multiple DNS query messages correspond to the same data network identification information; the service discovery function network element reports a DNS information report corresponding to one DNS query message among the multiple DNS query messages to the first core network network element once.
  • the service discovery function caches the plurality of DNS query messages; the service discovery function receives fourth indication information sent by the first core network element, and the fourth The indication information includes processing rules for the plurality of DNS query messages; the service discovery function determines to send the plurality of DNS query messages to the DNS server according to the fourth indication information.
  • the network element with the service discovery function receives the third indication information sent from the network element of the first core network.
  • the identification information of the EAS includes at least one of the following information: a uniform resource identifier (URI) of the EAS, an instance identifier of the EAS, and a fully qualified domain name (FQDN) of the EAS.
  • URI uniform resource identifier
  • FQDN fully qualified domain name
  • the identification information of the data network includes at least one of the following information: a data network access identifier DNAI, and a data network name DNN.
  • a method for obtaining an edge service includes, the first core network element sends third indication information to the service discovery function network element, the third indication information is used to indicate the service discovery function network element Sending a DNS information report to the first core network element for multiple DNS query messages, the multiple DNS query messages are used to query the address information of the EAS; the first core network element receives the DNS information report.
  • the third indication information includes correspondence relationship information between EAS identification information and data network identification information.
  • the first core network element sends fourth indication information to the service discovery function network element, where the fourth indication information includes information about the plurality of DNS query messages A processing rule, where the processing rule includes an option of constructing a client subnet for the plurality of DNS query messages.
  • the identification information of the EAS includes at least one of the following information: a uniform resource identifier (URI) of the EAS, an instance identifier of the EAS, and a fully qualified domain name (FQDN) of the EAS.
  • URI uniform resource identifier
  • FQDN fully qualified domain name
  • the identification information of the data network includes at least one of the following information: a data network access identifier DNAI, and a data network name DNN.
  • an apparatus for obtaining edge services includes a transceiver unit, the transceiver unit is configured to receive multiple DNS response messages sent by the DNS server, and the multiple DNS response messages include the information of the EAS to be queried by the terminal device. Address information; a processing unit, configured to determine to send a DNS information report to the first core network element for the plurality of DNS response messages according to the first indication information.
  • the first core network element is a session management function network element.
  • the first indication information includes correspondence relationship information between network addresses and data network identification information
  • the processing unit is specifically configured to, according to the first indication information and the multiple The DNS response message determines that the EAS to be queried corresponds to the same data network identification information
  • the transceiver unit is specifically configured to report a DNS information report corresponding to one of the multiple DNS response messages to the first core network element once.
  • the device further includes a storage unit configured to cache the multiple DNS response messages; the transceiver unit is specifically configured to receive the first core network element Sending second indication information, where the second indication information includes processing rules for the plurality of DNS response messages; the processing unit is specifically configured to determine to send the plurality of DNS response messages to the terminal device according to the second indication information.
  • the transceiving unit is further configured to receive the first indication information sent from the first core network element.
  • the identification information of the data network includes at least one of the following information: a data network access identifier DNAI of the data network, a data network name DNN of the data network .
  • a device for obtaining edge services includes a transceiver unit, configured to send first indication information to a network element with a service discovery function, where the first indication information is used to indicate that the network element with a service discovery function is multiple
  • Each DNS response message sends a DNS information report to the network element of the first core network, and the plurality of DNS response messages include the address information of the EAS to be queried by the terminal device; the transceiver unit is also used for receiving the DNS information report.
  • the first indication information includes correspondence relationship information between network addresses and data network identification information.
  • the transceiver unit is further configured to send second indication information to the network element with the service discovery function, where the second indication information includes the processing of the plurality of DNS response messages a rule, so that the service discovery function determines to send the plurality of DNS response messages to the terminal device according to the second indication information.
  • the identification information of the data network includes at least one of the following information: the data network access identifier DNAI of the data network, the data network name DNN of the data network .
  • an apparatus for obtaining edge services includes a transceiver unit for receiving multiple DNS query messages from a terminal device, and the multiple DNS query messages are used for querying address information of an EAS; a processing unit configured to It is determined according to the third indication information to send a DNS information report to the network element of the first core network for the plurality of DNS query messages.
  • the third indication information includes correspondence relationship information between EAS identification information and data network identification information
  • the processing unit is specifically configured to determine the Multiple DNS query messages correspond to the same data network identification information
  • the transceiver unit is also used to report a DNS information report corresponding to one of the multiple DNS query messages to the network element of the first core network.
  • the device further includes a storage unit configured to cache the multiple DNS query messages; the transceiver unit is also configured to receive the first core network element sent by the first core network element.
  • the fourth instruction information includes processing rules for the plurality of DNS query messages; the processing unit is specifically configured to determine to send the plurality of DNS query messages to the DNS server according to the fourth instruction information.
  • the transceiving unit is specifically configured to receive the third indication information sent from the first core network element.
  • the identification information of the EAS includes at least one of the following information: a uniform resource identifier (URI) of the EAS, an instance identifier of the EAS, and a fully qualified domain name (FQDN) of the EAS.
  • URI uniform resource identifier
  • FQDN fully qualified domain name
  • the identification information of the data network includes at least one of the following information: a data network access identifier DNAI, and a data network name DNN.
  • a device for obtaining edge services including a transceiver unit, configured to send third indication information to a network element with a service discovery function, where the third indication information is used to indicate that the network element with the service discovery function is multiple
  • a DNS query message is used to send a DNS information report to the first core network element, and the multiple DNS query messages are used to query the address information of the EAS; the transceiver unit is also used to receive the DNS information report.
  • the third indication information includes correspondence relationship information between EAS identification information and data network identification information.
  • the transceiver unit is further configured to send fourth indication information to the service discovery function network element, where the fourth indication information includes the processing of the multiple DNS query messages rule, the processing rule includes an option to construct a client subnet for the plurality of DNS query messages.
  • the identification information of the EAS includes at least one of the following information: a uniform resource identifier (URI) of the EAS, an instance identifier of the EAS, and a fully qualified domain name (FQDN) of the EAS.
  • URI uniform resource identifier
  • FQDN fully qualified domain name
  • the identification information of the data network includes at least one of the following information: a data network access identifier DNAI, and a data network name DNN.
  • an apparatus for obtaining edge services may be a network element with a service discovery function, and the apparatus may also be a chip.
  • the device has the function of realizing the service discovery function network element in any one of the first aspect or the third aspect or any possible implementation manner of any one of the above aspects.
  • This function may be implemented by hardware, or may be implemented by executing corresponding software on the hardware.
  • the hardware or software includes one or more modules or units corresponding to the above functions.
  • a device for obtaining an edge service may be a network element of the first core network, for example, a network element with a session management function; the device may also be a chip.
  • the apparatus has a function of realizing the second network element in any one of the second aspect or the fourth aspect or any possible implementation manner of any one of the above-mentioned aspects. This function may be implemented by hardware, or may be implemented by executing corresponding software on the hardware.
  • the hardware or software includes one or more modules or units corresponding to the above functions.
  • a device for obtaining edge services including a processor; the processor is coupled with a memory, and can be used to execute instructions in the memory, so as to realize any one or any of the above first or third aspects
  • the function of the service discovery function network element in any possible implementation manner, the function of the service discovery function network element.
  • the device further includes a memory.
  • the device further includes a communication interface, and the processor is coupled to the communication interface.
  • an apparatus for obtaining edge services including a processor.
  • the processor is coupled with the memory, and can be used to execute instructions in the memory, so as to realize the function of the second network element in any aspect of the second aspect or the fourth aspect, or any possible implementation manner of any aspect, the second network element
  • An element may be, for example, a mobility management network element.
  • the device further includes a memory.
  • the device further includes a communication interface, and the processor is coupled to the communication interface.
  • the device is a first core network element, such as an SMF.
  • the communication interface may be a transceiver, or an input/output interface.
  • the device is a chip configured in an SMF network element.
  • the communication interface may be an input/output interface.
  • the transceiver may be a transceiver circuit.
  • the input/output interface may be an input/output circuit.
  • a processor including: an input circuit, an output circuit, and a processing circuit.
  • the processing circuit is configured to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor executes any one of the above-mentioned first to fourth aspects or any possible one of any aspect method in the implementation.
  • the above-mentioned processor can be a chip
  • the input circuit can be an input pin
  • the output circuit can be an output pin
  • the processing circuit can be a transistor, a gate circuit, a flip-flop, and various logic circuits.
  • the input signal received by the input circuit can be received and input by the receiver
  • the output signal of the output circuit can be output to the transmitter and transmitted by the transmitter
  • the input circuit and the output circuit can be the same circuit.
  • the moments are used as input circuit and output circuit respectively.
  • the embodiment of the present application does not limit the specific implementation manners of the processor and various circuits.
  • an apparatus including a processor and a memory.
  • the processor is used to read instructions stored in the memory, and can receive signals through the receiver and transmit signals through the transmitter, so as to execute any one of the first to fourth aspects or any possible implementation of any one aspect method in .
  • processors there are one or more processors, and one or more memories.
  • the memory may be integrated with the processor, or the memory may be set separately from the processor.
  • the memory can be a non-transitory (non-transitory) memory, such as a read-only memory (read only memory, ROM), which can be integrated with the processor on the same chip, or can be respectively arranged in different On the chip, the embodiment of the present application does not limit the type of the memory and the configuration of the memory and the processor.
  • a non-transitory memory such as a read-only memory (read only memory, ROM)
  • ROM read only memory
  • a related data interaction process such as sending indication information may be a process of outputting indication information from a processor
  • receiving capability information may be a process of receiving input capability information from a processor.
  • processed output data may be output to the transmitter, and input data received by the processor may be from the receiver.
  • the transmitter and the receiver may be collectively referred to as a transceiver.
  • the device in the fourteenth aspect above can be a chip, and the processor can be implemented by hardware or by software.
  • the processor can be a logic circuit, integrated circuit, etc.; when implemented by software
  • the processor may be a general-purpose processor, which is implemented by reading software codes stored in a memory.
  • the memory may be integrated in the processor, or it may be located outside the processor and exist independently.
  • a computer program product includes: a computer program (also referred to as code, or an instruction), which, when the computer program is executed, causes the computer to execute the above-mentioned first aspect to A method in any one of the fourth aspects or any possible implementation of any one of the aspects.
  • a computer program also referred to as code, or an instruction
  • a computer-readable medium stores a computer program (also called code, or instruction), and when it is run on a computer, it causes the computer to execute the above-mentioned first aspect to the method in any one of the fourth aspects or any possible implementation of any one of the aspects.
  • a computer program also called code, or instruction
  • a system-on-a-chip including a processor, configured to call and run a computer program from a memory, so that a device installed with the system-on-a-chip executes any one of the first to fourth aspects or any one of the above-mentioned aspects.
  • FIG. 1 is a system architecture diagram applicable to an embodiment of the present application.
  • FIG. 2 is a schematic diagram of an edge service architecture according to an embodiment of the present application.
  • FIG. 3 is a schematic flow chart of an existing method 300 for acquiring edge services.
  • FIG. 4 is a schematic flowchart of a method 400 for acquiring edge services provided by the present application.
  • FIG. 5 is a schematic flowchart of a method 500 for acquiring edge services provided by the present application.
  • FIG. 6 is a schematic flowchart of a method 600 for acquiring edge services provided by the present application.
  • FIG. 7 is a schematic flowchart of a method 700 for acquiring edge services provided by the present application.
  • FIG. 8 is a schematic block diagram of an apparatus 100 for obtaining edge services provided by the present application.
  • FIG. 9 is a schematic block diagram of an apparatus 200 for obtaining edge services provided by the present application.
  • the wireless communication systems mentioned in the embodiments of this application include but are not limited to: global system of mobile communication (GSM) system, long term evolution (long term evolution, LTE) frequency division duplex (frequency division duplex, FDD) system , LTE time division duplex (time division duplex, TDD), LTE system, advanced long-term evolution (LTE-Advanced, LTE-A) system, next-generation communication system (for example, 6G communication system), integration of multiple access systems system, or evolved system.
  • GSM global system of mobile communication
  • LTE long term evolution
  • FDD frequency division duplex
  • FDD frequency division duplex
  • LTE time division duplex time division duplex
  • LTE-A advanced long-term evolution
  • next-generation communication system for example, 6G communication system
  • integration of multiple access systems system or evolved system.
  • the technical solution provided by this application can also be applied to machine type communication (machine type communication, MTC), inter-machine communication long-term evolution technology (Long Term Evolution-machine, LTE-M), device to device (device to device, D2D) network , machine to machine (machine to machine, M2M) network, Internet of things (internet of things, IoT) network or other networks.
  • MTC machine type communication
  • LTE-M inter-machine communication long-term evolution technology
  • D2D device to device
  • machine to machine machine to machine
  • M2M machine to machine
  • IoT Internet of things
  • the IoT network may include, for example, the Internet of Vehicles.
  • V2X vehicle to other devices
  • this V2X can include: vehicle to vehicle (vehicle to vehicle, V2V) communication, vehicle and infrastructure (vehicle to infrastructure, V2I) communication, vehicle to pedestrian (vehicle to pedestrian, V2P) or vehicle to network (vehicle to network, V2N) communication, etc.
  • the terminal equipment involved in the embodiments of the present application may include various access terminals, mobile equipment, user terminals or user devices with wireless communication functions.
  • the terminal device may be a user equipment (user equipment, UE), for example, a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (virtual reality, VR) terminal device, an augmented reality (augmented reality, AR) terminal equipment, etc.
  • Terminal equipment can also be wireless terminals in industrial control (industrial control), machine type communication (machine type communication, MTC) terminals, customer premise equipment (CPE), wireless terminals in self-driving , wireless terminals in remote medical, wireless terminals in smart grid, wireless terminals in transportation safety, wireless terminals in smart city, smart home ), cellular phones, cordless phones, session initiation protocol (session initiation protocol, SIP) phones, wireless local loop (wireless local loop, WLL) stations, personal digital assistants (personal digital assistant, PDA), handheld phones with wireless communication capabilities Devices, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in 5G networks or terminal devices in public land mobile networks (PLMN) that will evolve in the future, etc.
  • industrial control industrial control
  • machine type communication machine type communication
  • CPE customer premise equipment
  • wireless terminals in self-driving wireless terminals in remote medical
  • wireless terminals in smart grid wireless terminals in transportation safety
  • wireless terminals in smart city, smart home
  • Figure 1 is a schematic block diagram of an example of a wireless communication system architecture applicable to the present application. As shown in the figure, the system architecture may specifically include the following network elements:
  • (wireless) access network ((radio) access network, (R) AN): An access network that implements access network functions based on wireless communication technology can be called a radio access network.
  • the wireless access network can manage wireless resources, provide access services for terminals, and complete the forwarding of control signals and user data between terminals and the core network.
  • the wireless access network device involved in this application may be a device with a wireless transceiver function.
  • the radio access network device may be a device that provides wireless communication function services, and is usually located on the network side, including but not limited to: a next-generation base station (gNodeB, gNB) in a fifth-generation (5th generation, 5G) communication system, a sixth-generation The next generation base station in the 6th generation (6G) mobile communication system, the base station in the future mobile communication system or the access node in the WiFi system, etc., the evolved node B (evolved node B, eNB) in the LTE system, wireless Network controller (radio network controller, RNC), node B (node B, NB), base station controller (base station controller, BSC), home base station (for example, home evolved NodeB, or home Node B, HNB), baseband unit (base band unit, BBU), transmission reception point (transmission reception point, TRP), transmission point (transmitting point, TP), base transcei
  • the access network device may include a centralized unit (centralized unit, CU) node, or a distributed unit (distributed unit, DU) node, or a RAN device including a CU node and a DU node, or a control plane CU Node and user plane CU node, and RAN equipment of DU node.
  • the access network device provides services for the cell, and the user equipment communicates with the base station through the transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell.
  • the cell may be a cell corresponding to the base station (for example, a base station). It can belong to a macro base station, or it can belong to a base station corresponding to a small cell.
  • the small cell here can include: a metro cell, a micro cell, a pico cell, and a femto cell ( Femto cell), etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.
  • the wireless access network device can be a macro base station, a micro base station or an indoor station, or a relay node or a donor node, a device that provides wireless communication services for user equipment in a V2X communication system, a cloud wireless access network ( Cloud radio access network (CRAN) wireless controllers, relay stations, vehicle-mounted devices, wearable devices, and network devices in future evolution networks.
  • CRAN Cloud radio access network
  • the embodiments of the present application do not limit the specific technology adopted by the radio access network device and the specific form of the device.
  • User plane function It can be used for packet routing and forwarding, or quality of service (QoS) processing of user plane data.
  • User data can be accessed to a data network (data network, DN) through this network element.
  • data network data network
  • Data network (data network, DN) 140 used to provide a network for transmitting data.
  • Access and mobility management function network element used for mobility management and access management, etc.
  • MME mobility management entity
  • Session management function network element session management function, SMF 160: mainly used for session management, network interconnection protocol (internet protocol, IP) address allocation and management of terminal equipment, selection of manageable user plane functions, policy control and The endpoint of the charging function interface and the notification of downlink data, etc.
  • SMF session management function network element
  • IP network interconnection protocol
  • Network exposure function (NEF) 180 mainly used to securely expose services and capabilities provided by the 3rd Generation Partnership Project (3GPP) network function to the outside.
  • PCF Policy control function
  • Application function network element (application function, AF) 1110 used for routing data affected by applications, accessing network opening function network elements, and interacting with policy frameworks for policy control, etc.
  • the above network architecture also includes a network slice selection function (NSSF), which is used to manage information related to network slices; a network repository function (NRF), which is used to store network functional entities And the description information of the services it provides, as well as supporting functions such as service discovery and network element entity discovery.
  • NSSF network slice selection function
  • NEF network repository function
  • the N2 interface is the interface between the RAN and the AMF network element, and is used for sending non-access stratum (non-access stratum, NAS) messages, etc.
  • the N3 interface is the interface between the RAN and the UPF network element, used
  • the N4 interface is the interface between the SMF network element and the UPF network element, and is used to transmit such information as the tunnel identification information of the N3 connection, data cache indication information, and downlink data notification messages.
  • the above-mentioned network element or function may be a network element in a hardware device, or a software function running on dedicated hardware, or a virtualization function instantiated on a platform (for example, a cloud platform).
  • the access management function network element is an AMF network element
  • the session management network element is an SMF network element
  • the policy control network element is a PCF network element for example.
  • the AMF network element is referred to as AMF
  • the SMF network element is referred to as SMF
  • the PCF network element is referred to as PCF. That is, the AMF described later in this application can be replaced by an access management function network element, the SMF can be replaced by a session management network element, and the PCF can be replaced by a policy control network element.
  • this application takes the device as an example of an AMF entity, an SMF entity, and a PCF entity to describe the method for information transmission.
  • a device that is a chip in an AMF entity, a chip in an SMF entity, or a chip in a PCF entity
  • the implementation method of the chip refer to the specific descriptions of the devices being the AMF entity, the SMF entity, and the PCF entity, and the introduction will not be repeated.
  • the UE is connected to the AMF through the N1 interface
  • the RAN is connected to the AMF through the N2 interface
  • the RAN is connected to the UPF through the N3 interface.
  • the UPFs are connected through the N9 interface, and the UPF is interconnected with the data network (data network, DN) through the N6 interface.
  • the SMF controls the UPF through the N4 interface.
  • N1, N2, N3, N4, etc. are interface serial numbers.
  • the meanings of these interface serial numbers may refer to the meanings defined in the current standard protocol, and there is no limitation here.
  • the above-mentioned network architecture applied to the embodiment of the present application is only an example of a network architecture described from the perspective of a traditional point-to-point architecture and a service-oriented architecture, and the network architecture applicable to the embodiment of the present application is not limited thereto. Any network architecture capable of implementing the functions of the foregoing network elements is applicable to this embodiment of the present application.
  • FIG. 2 shows a schematic diagram of a system architecture or a scenario of an application of an embodiment of the present application.
  • the system can also be regarded as supporting edge computing (edge computing) can be introduced into the above-mentioned network architecture.
  • edge computing edge computing
  • the system architecture includes an edge application server (edge application server, EAS).
  • EAS is an edge application server deployed in an edge data network (edge data network, EDN).
  • EDN edge data network
  • application instances application instances
  • edge application instances multi-access edge computing (multi-access edge computing, MEC) applications (servers), EAS functions, etc.
  • the edge application may also be referred to as an "application instance", specifically referring to an instance of a server application (for example, social media software, augmented reality (augmented reality, AR), virtual reality (virtual reality, VR)) deployed and running on the EDN ( instance).
  • An application can deploy one or more EASs in one or more EDNs.
  • EASs deployed and running in different EDNs can be regarded as different EASs of an application.
  • Applications use different domain names, which can be fully qualified domain names (fully qualified domain names, FQDNs), can use a free-play Internet protocol (internet protocol, IP) address, or can use different IP addresses.
  • IP Internet protocol
  • the edge data network can be a local (local) data network
  • the local DN can be identified by a data network access identifier (DNAI) and a data network name (DNN), which is a network logic concept .
  • DNAI data network access identifier
  • DNN data network name
  • the system architecture also includes an edge application server discovery function (edge application server discovery function, EASDF) network element, and the EASDF may include one or more of the following functions:
  • EASDF edge application server discovery function
  • the EASDF can also establish a user plane connection with the UPF through the N6 interface, and transmit DNS signaling exchanged with the UE.
  • EADSF can be directly connected to one or more local DNs.
  • a DNS server (resolver/server) can be deployed locally by the 5GC operator or a third party including the local DN to resolve the DNS query of the UE to the appropriate EAS IP address in the local DN.
  • a DNS server can be deployed at different locations in the network, as a central DNS (C-DNS) server or a local DNS (L-DNS) server, the L-DNS may or may not be connected to the C-DNS, depending on the deployment.
  • C-DNS central DNS
  • L-DNS local DNS
  • protocol data unit protocol data unit
  • PDU protocol data unit
  • SMF protocol data unit
  • PDU session anchor PDU session anchor
  • SMF can insert an uplink classifier (uplink classifier, UL CL) in the data transmission path of the PDU session.
  • uplink classifier uplink classifier
  • UL CL uplink classifier
  • the UL CL function is provided by UPF and is used to forward the data packets meeting the service filtering rules to the specified path.
  • this PDU session can have multiple PDU session anchor points, providing multiple different paths to access the same DN. That is to say, the function of UL CL can be to transmit uplink data to different PSAs and combine downlink data to UE.
  • the data corresponding to each PSA can also be aggregated in a common UPF, and this common UPF has a branching point (branching point, BP) function. The branch point forwards uplink data to different PSAs upwards, and merges downlink data from PSAs downwards.
  • branch point branch point forwards uplink data to different PSAs upwards, and merges downlink data from PSAs downwards.
  • UPF (UL CL/BP) can represent a UPF that provides UL CL functions or a public UPF, that is, the UPF can transmit uplink data to different PSAs, for example, UPF (PSA2) and UPF (PSA1), and combine downlink data to UE.
  • PSA2 UPF
  • PSA1 UPF
  • terminal devices need to obtain the IP address of EAS through a DNS-based service discovery mechanism. As shown in Figure 3, the terminal device can obtain the IP address of the EAS through the following steps:
  • the process of establishing the PDU session includes establishing the session of the user plane path between the UE and the UPF, and the specific process is in the prior art, and will not be repeated here.
  • the SMF selects EASDF.
  • the SMF sends a DNS context creation request (Neasdf_DNSContext_Create Request) to the selected EASDF.
  • the DNS context creation request can include the IP address of the terminal device, callback URI, and DNS message processing rules.
  • EASDF can create a DNS context for the PDU session according to the request message and store the UE IP address, callback URI, and DNS message processing rules in the in context.
  • the EASDF sends a DNS context creation response to the SMF.
  • the SMF sends a DNS context update request (Neasdf_DNSContext_UpdateRequest) to the EASDF.
  • the update request message may be triggered by the mobility of the terminal device, or the update request message may also be triggered by the insertion or removal of the PSA.
  • the update request message may include an EASDF context ID and a DNS message processing rule.
  • the EASDF sends a DNS context update response to the SMF.
  • the terminal device sends a DNS query message to the EASDF.
  • the EASDF sends the DNS message report to the SMF by calling a DNS context notification request (Neasdf_DNSContext_Notify Request).
  • the SMF sends a DNS context notification response (Neasdf_DNSContext_Notify Response) to the EASDF.
  • the SMF sends the DNS context to the EASDF Update request (Neasdf_DNSContext_Update Request).
  • the update request may include DNS message processing rules.
  • ECS EDNS-Client-Subnet
  • DNS EDNS-Client-Subnet
  • the EASDF sends a DNS context update response (Neasdf_DNSContext_Update Response) to the SMF.
  • the EASDF processes the received DNS query message.
  • EASDF can add ECS option in the DNS query message, and send the DNS query message to the C-DNS server. Alternatively, EASDF can also send the DNS query message to the Local DNS server.
  • the EASDF sends the DNS query request to the DNS server.
  • the EASDF receives a DNS response (DNS response) sent by the DNS server.
  • DNS response DNS response
  • the EASDF sends a DNS message report to the SMF by triggering a DNS context notification request (Neasdf_DNSContext_Notify request).
  • the SMF sends a DNS context notification response (Neasdf_DNSContext_Notify Response) to the EASDF.
  • the SMF may also perform insertion of UL CL/BP.
  • SMF can determine DNAI and determine the associated N6 traffic routing information of DNAI, SMF can perform UL CL/BP and local PSA selection and insertion, and complete the data plane path for UE Establish.
  • EAS information e.g., EAS IP address
  • the SMF may send a DNS context update request (Neasdf_DNSContext_Update Request) to the EASDF.
  • the request message may include DNS message processing rules
  • EASDF sends DNS context update response (Neasdf_DNSContext_Update Response) to SMF.
  • the EASDF sends the DNS response message to the terminal device.
  • the same edge service may involve more than one FQDN. Therefore, when the terminal device accesses the edge service, it will send multiple DNS query requests at the same time. At the same time, the multiple DNS query requests sent by EASDF to the DNS server and Receive multiple DNS responses, multiple DNS responses will trigger EASDF to initiate multiple DNS message reports to SMF, so that SMF selects DNAI and inserts ULCL/BP. However, since the EAS in the returned results of these DNS responses is usually in the same DN, EASDF initiates multiple DNS message reports to the SMF, which may cause waste of signaling resources.
  • the present application provides a method for obtaining edge services.
  • the service discovery function network element can determine a specific message sending strategy through indication information, thereby saving signaling overhead in obtaining edge services.
  • FIG. 4 is a schematic block diagram of a method 400 for obtaining edge services provided by the present application. The method at least includes the following steps.
  • the service discovery function network element receives multiple DNS response (DNS Response) messages sent by the DNS server.
  • DNS Response DNS Response
  • the service discovery function network element may include an EASDF network element
  • the multiple DNS response messages are responses to multiple DNS query (DNS Query) request messages sent by the terminal equipment
  • the multiple DNS response messages should include the information that the terminal equipment needs to query.
  • the address information of the EAS may include an EASDF network element
  • the EAS address information may include address information of multiple EASs of the same edge service, or the EAS address information may also be multiple EAS address information corresponding to different edge services.
  • the network element with the service discovery function determines to send a DNS information report to the network element of the first core network for the plurality of DNS response messages according to the first indication information.
  • the service discovery function network element determines to send a DNS information report to the first core network element for the plurality of DNS response messages according to the first indication information may include, the service discovery function network element reports to the first core network element according to the first indication information
  • the first core network element may be a session management function network element, and the DNS information report is used to trigger the session management function network element to send processing rules for the plurality of DNS response messages.
  • the first indication information may include a correspondence between the network address information and the data network.
  • the first indication information may include a correspondence table between network address information and identification information of the data network.
  • the network address information may be an IP address; the identification information of the data network may include a data network access identifier DNAI and/or a data network name DNN. It should be understood that the same edge service may correspond to different EAS identification information, and different EAS identification information may correspond to the same data network identification information.
  • This data network can be a local DN.
  • identification information may also be any other information from which the edge server address information can be obtained.
  • the network element with the service discovery function receives the multiple DNS response messages, and the multiple DNS response messages include the address information of the EAS, and the network element with the service discovery function may use the address information of the EAS and the network address information The corresponding relationship with the data network determines the data network corresponding to the EAS address information. If the EAS address information corresponds to the same data network, the service discovery function network element determines to report a DNS information report for the multiple DNS response messages.
  • the first indication information may be configured in the network element with the service discovery function, or the network element with the service discovery function may also receive the first indication information sent by the network element of the first core network.
  • the service discovery function network element can receive the first indication information during the PDU session establishment process, the service discovery function network element receives the DNS context creation request (Neasdf_DNSContext_Create Request) sent by the SMF, and the request message includes the first indication information information.
  • the service discovery function network element may also receive the first indication information in the DNS context update process, for example, the EASDF receives the DNS context update request (Neasdf_DNSContext_Update Request) sent by the SMF, which includes the first indication information.
  • the EASDF may also receive the first indication information at any time before the terminal device sends the DNS query request.
  • the method may further include S430, the network element with the service discovery function caches the plurality of DNS response messages.
  • the network element with the service discovery function may cache the plurality of DNS response messages, and subsequently, the network element with the service discovery function may determine to send all of the plurality of DNS response messages to the terminal device according to the DNS processing rule sent by the network element of the first core network. or part.
  • the method may further include S440.
  • the network element with the service discovery function receives second indication information sent by the network element of the first core network, where the second indication information includes DNS processing rules for the plurality of DNS response messages.
  • the DNS processing rule may be used to instruct the service discovery function network element to send the cached DNS response messages to the terminal device, or to instruct the service discovery function network element to send a specified EAS to the terminal device
  • the DNS response message of the address range or, the DNS processing rule can also be used to instruct the service discovery function network element not to cache the first DNS response message after the multiple DNS responses, and the first DNS response message is also for the terminal Responses to multiple DNS query request messages sent by the device; or, the DNS processing rule may further include instructing the service discovery function network element to discard the first DNS response message after the multiple DNS responses.
  • the service discovery function network element sends the plurality of DNS response messages to the terminal device.
  • the service discovery function network element can receive multiple DNS response messages, and the multiple DNS response messages may include multiple EAS address information corresponding to the same data network, and the service discovery function network element can be based on the first One indication information is determined to be multiple DNS response messages and only one DNS information report is sent to the network element of the first core network, thereby saving signaling overhead when querying address information of multiple EASs.
  • FIG. 5 is a schematic block diagram of a method 500 for obtaining edge services provided by the present application. The method at least includes the following steps.
  • the service discovery function network element receives multiple DNS query (DNS Query) messages sent by the terminal device.
  • DNS query DNS Query
  • the plurality of DNS query messages should be used for the terminal device to obtain the address information of the EAS of the edge service.
  • the EAS address information may include address information of multiple EASs of the same edge service, or the EAS address information may also be multiple EAS address information corresponding to different edge services.
  • the network element with the service discovery function determines to send a DNS information report to the network element of the first core network for the plurality of DNS query messages according to the third indication information.
  • the service discovery function network element determines to send a DNS information report to the first core network element for the plurality of DNS query messages according to the third indication information may include, the service discovery function network element reports to the first core network element according to the third indication information
  • the first core network element may be a session management function network element, and the DNS information report is used to trigger the session management function network element to send DNS processing rules for the plurality of DNS query messages.
  • the third indication information may include a correspondence between the identification information of the EAS and the data network.
  • the first indication information may include a correspondence table between identification information of the EAS and identification information of the data network.
  • the identification information of the EAS may also include at least one of the following information, the uniform resource identifier (uniform resource identifier, URI) of the EAS, the instance identifier (instance ID) of the EAS, and the FQDN of the EAS. It should be understood that the address information of the EAS can be obtained according to the identification message of the EAS.
  • the identification information of the data network is similar to that in S420 and will not be repeated here.
  • identification information may also be any other information from which the edge server address information can be obtained.
  • the multiple DNS query messages include the identification information of the EAS to be queried
  • the network element with the service discovery function may determine the The data network corresponding to the identification information of the EAS to be queried, if the identification information of the EAS to be queried corresponds to the same data network, the service discovery function network element determines to report a DNS information report for the plurality of DNS query messages.
  • the third indication information may be configured in the network element with the service discovery function, or the network element with the service discovery function may also receive the third indication information sent by the network element of the first core network.
  • the service discovery function network element can receive the third indication information during the PDU session establishment process, the service discovery function network element receives the DNS context creation request (Neasdf_DNSContext_Create Request) sent by the SMF, and the request message includes the third indication information.
  • the network element with the service discovery function may also receive the third indication information in the DNS context update process, for example, the EASDF receives the DNS context update request (Neasdf_DNSContext_Update Request) sent by the SMF, which includes the third indication information.
  • the EASDF may also receive the third indication information at any time before the terminal device sends the DNS query request.
  • the third indication information may be included in the same information as the above-mentioned first indication information, for example, the first information, and the first core network element may send the first information to the The service discovery function network element sends the first indication information and the third indication information.
  • the method may further include S530, the network element with the service discovery function caches the plurality of DNS query messages.
  • the network element with the service discovery function can cache the plurality of DNS query messages, and subsequently, the network element with the service discovery function can process the DNS query messages according to the DNS processing rules sent by the network element of the first core network, for example, construct an EDNS client sub Network option information.
  • the method may further include S540, receiving fourth indication information sent by the first core network element, where the fourth indication information includes DNS processing rules.
  • the network element with the service discovery function sends the multiple DNS query requests to the DNS server to obtain DNS response messages corresponding to the multiple DNS query requests, where the DNS response message includes address information of the EAS to be queried by the terminal device.
  • the network element with the service discovery function sends the plurality of DNS response messages to the terminal device.
  • the service discovery function network element can receive multiple DNS query messages, and the multiple DNS query messages may correspond to the same data network, and the service discovery function network element can be determined as multiple according to the third indication information.
  • Each DNS query message sends a DNS information report to the network element of the first core network only once, thereby saving signaling overhead when querying address information of multiple EASs.
  • FIG. 6 is a schematic flowchart of another method 600 for obtaining edge services provided by the present application.
  • the method 600 shown in FIG. 6 can be composed of SMF, EASDF, UDM (ULCL/BP) and Execution by network elements such as UDM (PSA). As shown in FIG. 6, the method includes steps S610 to S6110.
  • the SMF sends the first indication information to the EASDF, and the EASDF receives the first indication information accordingly.
  • the first indication information is similar to that in S420, and will not be repeated here.
  • the EASDF receives multiple DNS query messages sent by the terminal device.
  • the multiple DNS query messages may be used to obtain address information of EASs corresponding to the same data network identifier, where the identifier information of the data network is similar to that in S420.
  • the EASDF sends the multiple DNS query messages to the DNS server.
  • the EASDF receives DNS response messages sent by the DNS server for responding to the multiple DNS query messages.
  • the EASDF caches the multiple DNS response messages, and determines to send a DNS information report to the first core network element for the multiple DNS response messages according to the first indication information.
  • the EASDF sends a DNS information report (DNS context notification request) to the SMF.
  • the EASDF receives a response message (DNS context notification response) of the DNS information report.
  • the SMF establishes a data plane path for the terminal device according to the DNS information report.
  • the SMF sends second indication information to the EASDF, where the second indication information may include a DNS processing rule.
  • the SMF may send the second indication information through a DNS context update request (Neasdf_DNSContext_Update Request) message.
  • a DNS context update request Neasdf_DNSContext_Update Request
  • the DNS processing rule may be used to instruct the service discovery function network element to send the DNS response message strategy to the terminal device, for example, sending the multiple DNS response messages cached by the EASDF, or sending a DNS response message specifying the EAS address range
  • the second indication information may include EAS IP address range information, a specified DANI or a specified FQDN; or, it may also be used to indicate that the service discovery function network element does not cache the first DNS response message after the multiple DNS responses,
  • the first DNS response message is also a response to multiple DNS query request messages sent by the terminal device; or, the DNS processing rule may further include instructing the service discovery function network element to discard the first DNS response message after the multiple DNS responses. DNS response message.
  • the SMF receives a response message sent by the EASDF, and the response information may be a DNS context update response (Neasdf_DNSContext_Update Response).
  • the EASDF sends a DNS response message to the terminal device.
  • FIG. 7 is a schematic flowchart of another method 700 for obtaining edge services provided by the present application.
  • the method 700 shown in FIG. 7 can be composed of SMF, EASDF, UDM (ULCL/BP) and Execution by network elements such as UDM (PSA). As shown in FIG. 7, the method includes steps S710 to S7110.
  • the SMF sends third indication information to the EASDF, and the EASDF receives the third indication information accordingly.
  • the third indication information is similar to that in S520 and will not be repeated here.
  • the EASDF receives multiple DNS query messages sent by the terminal device.
  • the multiple DNS query messages may be used to obtain address information of EASs corresponding to the same data network identifier, where the identifier information of the data network is similar to that in S420.
  • the EASDF caches the multiple DNS query messages
  • the EASDF determines to send a DNS information report (DNS context notification request) to the first core network element for the plurality of DNS query messages according to the third indication information.
  • DNS context notification request DNS context notification request
  • the EASDF receives a response message (DNS context notification response) of the DNS information report.
  • the SMF sends fourth indication information to the EASDF, where the fourth indication information may include a DNS processing rule.
  • the DNS processing rule may include option information for constructing an EDNS client subnet.
  • the SMF may send the second indication information through a DNS context update request (Neasdf_DNSContext_Update Request) message.
  • a DNS context update request Neasdf_DNSContext_Update Request
  • the EASDF receives a DNS context update response (Neasdf_DNSContext_Update Response) message.
  • the EASDF constructs EDNS client subnet option information for the cached DNS query message.
  • the EASDF sends the multiple DNS query messages to the DNS server.
  • the EASDF receives DNS response messages sent by the DNS server for responding to the multiple DNS query messages.
  • the EASDF sends a DNS response message to the terminal device.
  • words such as “first” and “second” are used to describe the same functions and functions that are basically the same. item or similar items.
  • the first information and the second information are only for distinguishing different information, and the sequence thereof is not limited.
  • words such as “first” and “second” do not limit the number and execution order, and words such as “first” and “second” do not necessarily limit the difference.
  • each node such as a terminal device or a network device, includes a corresponding hardware structure and/or software module for performing each function.
  • each node such as a terminal device or a network device
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software drives hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.
  • the embodiment of the present application may divide the terminal device or the terminal device into functional modules according to the above method examples.
  • each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. It should be noted that the division of modules in the embodiment of the present application is schematic, and is only a logical function division, and there may be other division methods in actual implementation. In the following, the division of each functional module corresponding to each function is taken as an example to illustrate.
  • Fig. 8 is a schematic block diagram of an apparatus 100 according to an embodiment of the present application. As shown in the figure, the apparatus 100 may include: a transceiver unit 110 and a processing unit 120 .
  • the apparatus 100 may be the network element with the service discovery function in the method embodiment above, or a chip for realizing the function of the network element with the service discovery function in the method embodiment above.
  • the device 100 may correspond to the service discovery function network element in the method 400, the method 500, the method 600 and the method 700 according to the embodiment of the present application, and the device 100 may execute the method 400, the method 500, Steps corresponding to the service discovery function network element in method 600 and method 700. It should be understood that the specific process for each unit to perform the above corresponding steps has been described in detail in the above method embodiments, and for the sake of brevity, details are not repeated here.
  • the transceiver unit is used for receiving multiple DNS response messages sent by the DNS server.
  • the multiple DNS response messages are responses to multiple DNS query (DNS Query) request messages sent by the terminal device, and the multiple DNS response messages should include the address information of the EAS that the terminal device needs to query.
  • DNS query DNS Query
  • the EAS address information may include address information of multiple EASs of the same edge service, or the EAS address information may also be multiple EAS address information corresponding to different edge services.
  • the processing unit is configured to determine to send a DNS information report to the first core network element for the plurality of DNS response messages according to the first indication information.
  • the first indication information may include a correspondence between the network address information and the data network.
  • the apparatus 100 may further include a storage unit 130, configured to cache the multiple DNS response messages.
  • the transceiving unit is further configured to receive second indication information sent by a network element of the first core network, where the second indication information includes DNS processing rules for the plurality of DNS response messages.
  • the DNS processing rule may be used to instruct the network element of the service discovery function to send the cached DNS response messages to the terminal device, or to instruct the network element of the service discovery function to send the DNS of the specified EAS address range to the terminal device. response message; or, the DNS processing rule may also be used to instruct the service discovery function network element not to cache the first DNS response message after the multiple DNS responses, and the first DNS response message is also the multiple DNS response message sent to the terminal device or, the DNS processing rule may further include instructing the service discovery function network element to discard the first DNS response message after the multiple DNS responses.
  • the device 100 may be the first core network element in the above method embodiment, for example, SMF, or it may be a device for implementing the first core network element in the above method embodiment. function chip. It should be understood that the apparatus 100 may execute the steps corresponding to the first core network element in the method 400 , the method 500 , the method 600 and the method 700 in the embodiments of the present application. It should be understood that the specific process for each unit to perform the above corresponding steps has been described in detail in the above method embodiments, and for the sake of brevity, details are not repeated here.
  • FIG. 9 is a schematic block diagram of an apparatus 200 provided by an embodiment of the present application.
  • the apparatus 200 includes: at least one processor 220 .
  • the processor 220 is coupled with the memory for executing instructions stored in the memory to send signals and/or receive signals.
  • the device 200 further includes a memory 230 for storing instructions.
  • the apparatus 200 further includes a transceiver 210, and the processor 220 controls the transceiver 210 to send signals and/or receive signals.
  • processor 220 and the memory 230 may be combined into one processing device, and the processor 220 is configured to execute the program codes stored in the memory 230 to implement the above functions.
  • the memory 230 may also be integrated in the processor 220 , or be independent of the processor 220 .
  • the transceiver 210 may include a transceiver (or a receiver) and a transmitter (or a transmitter).
  • the transceiver may further include antennas, and the number of antennas may be one or more.
  • Transceiver 210 may be a communication interface or an interface circuit.
  • the transceiver 210 in the device 200 may correspond to the transceiver unit 110 in the device 100
  • the processor 220 in the device 200 may correspond to the processing unit 120 in the device 200 .
  • each step of the above method can be completed by an integrated logic circuit of hardware in a processor or an instruction in the form of software.
  • the steps of the methods disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor.
  • the software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register.
  • the storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware. To avoid repetition, no detailed description is given here.
  • the processor in the embodiment of the present application may be an integrated circuit chip, which has a signal processing capability.
  • each step of the above-mentioned method embodiments may be completed by an integrated logic circuit of hardware in a processor or instructions in the form of software.
  • the above-mentioned processor can be a general-purpose processor, a digital signal processor (digital signal processor, DSP), an application-specific integrated circuit (application-specific integrated circuit, ASIC), a field-programmable gate array (field-programmable gate array, FPGA) or Other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.
  • DSP digital signal processor
  • ASIC application-specific integrated circuit
  • FPGA field-programmable gate array
  • Other programmable logic devices discrete gate or transistor logic devices, discrete hardware components.
  • a general-purpose processor may be a microprocessor, or the processor may be any conventional processor, and the like.
  • the steps of the method disclosed in the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register.
  • the storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.
  • the memory in the embodiments of the present application may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories.
  • 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 programmable Erases programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • Volatile memory can be random access memory (RAM), which acts as external cache memory.
  • RAM random access memory
  • static RAM static random access memory
  • dynamic RAM dynamic random access memory
  • DRAM dynamic random access memory
  • synchronous dynamic random access memory synchronous DRAM, SDRAM
  • double data rate synchronous dynamic random access memory double data rate SDRAM, DDR SDRAM
  • enhanced synchronous dynamic random access memory enhanced SDRAM, ESDRAM
  • synchronous connection dynamic random access memory direct ram-bus RAM, DR RAM
  • direct ram-bus RAM direct ram-bus RAM
  • the present application also provides a computer program product, the computer program product stores computer program code, and when the computer program code is run on the computer, the computer executes method 300 and method 400 .
  • the method in any one embodiment of the method 500 embodiment.
  • the present application also provides a computer-readable medium, the computer-readable medium stores program code, and when the program code is run on the computer, the computer is made to execute the method 300, method 400, The method in any one of the embodiments of the method 500.
  • the present application further provides a system, which includes the foregoing apparatus or equipment.
  • all or part of them may be implemented by software, hardware, firmware or any combination thereof.
  • software When implemented using software, it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrated with one or more available media.
  • the available medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (for example, a solid state disk (solid state disc, SSD)) etc.
  • a magnetic medium for example, a floppy disk, a hard disk, a magnetic tape
  • an optical medium for example, a high-density digital video disc (digital video disc, DVD)
  • a semiconductor medium for example, a solid state disk (solid state disc, SSD)
  • the network-side equipment in each of the above device embodiments corresponds to the terminal equipment and the network-side equipment or terminal equipment in the method embodiments, and the corresponding modules or units perform corresponding steps, for example, the communication unit (transceiver) executes the receiving method in the method embodiments. Or the step of sending, other steps besides sending and receiving may be performed by a processing unit (processor). For the functions of the specific units, reference may be made to the corresponding method embodiments. Wherein, there may be one or more processors.
  • a component may be, but is not limited to being, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and/or a computer.
  • an application running on a computing device and the computing device can be components.
  • One or more components can reside within a process and/or thread of execution and a component can be localized on one computer and/or distributed between two or more computers.
  • these components can execute from various computer readable media having various data structures stored thereon.
  • a component may, for example, be based on a signal having one or more packets of data (e.g., data from two components interacting with another component between a local system, a distributed system, and/or a network, such as the Internet via a signal interacting with other systems). Communicate through local and/or remote processes.
  • packets of data e.g., data from two components interacting with another component between a local system, a distributed system, and/or a network, such as the Internet via a signal interacting with other systems.
  • the disclosed systems, devices and methods may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
  • the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disc and other media that can store program codes. .

Abstract

本申请提供了一种获取边缘服务的方法和装置，该方法包括：该方法包括，服务发现功能网元接收DNS服务器发送的多个DNS响应消息，该多个DNS响应消息包括终端设备需查询的EAS的地址信息；该服务发现功能网元根据第一指示信息确定为该多个DNS响应消息向第一核心网网元发送一次DNS信息报告。通过减少该服务发现功能网向第一核心网网元发送DNS信息报告时的信令开销，从而节省了获取边缘服务过程中的信令开销。

Description

一种获取边缘服务的方法和装置
本申请要求于2021年8月6日提交中国专利局、申请号为202110904355.3、申请名称为“一种获取边缘服务的方法和装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域，更具体地，涉及一种获取边缘服务的方法和装置。
背景技术
终端设备要使用边缘业务，首先需要通过基于DNS的服务发现机制来获取边缘应用服务器(edge application server，EAS)的地址信息。目前，终端设备获取EAS的地址信息包括以下几个步骤：终端设备可以向边缘应用服务发现功能网元(edge application server discovery function，EASDF)发送DNS查询请求，以获取EAS的地址信息，该查询请求可以包括EAS的标识信息；EASDF向DNS服务器发送该DNS查询以获取该业务对应的DNS响应，并根据该响应向SMF发送DNS信息报告，以使SMF完成终端设备的数据面路径建立；最后EASDF向终端设备发送DNS响应消息，其中包括EAS的地址信息。
在现在的网络业务中，同一个边缘服务可能会涉及不止一个EAS标识信息，因此，终端设备在访问业务时会同时发出多个DNS查询请求，同时，EASDF向DNS服务器发送多个DNS查询请求并接收多个DNS响应，多个DNS响应可能会触发EASDF向SMF发起多个DNS信息报告，以使SMF完成终端设备的数据面路径建立。由于这些DNS响应返回结果中的EAS通常在同一个数据网络(data network，DN)中，只需SMF完成一次终端设备的数据面路径建立即可。因此，现有的获取边缘服务的方法可能会造成信令资源的浪费。
发明内容
本申请提供一种获取边缘服务的方法和装置，能够节省获取边缘服务过程的信令开销。
第一方面，提供一种获取边缘服务的方法，该方法包括，服务发现功能网元接收DNS服务器发送的多个DNS响应消息，该多个DNS响应消息包括终端设备需查询的EAS的地址信息；该服务发现功能网元根据第一指示信息确定为该多个DNS响应消息向第一核心网网元发送一次DNS信息报告。
根据本申请实施例提供的方法，服务发现功能网元可以接收多个DNS响应消息，该多个DNS响应消息可能包括对应相同数据网络的多个EAS地址信息，该服务发现功能网元可以根据第一指示信息确定为多个DNS响应消息向第一核心网网元只发送一次DNS信息报告，从而可以节省查询多个EAS的地址信息时的信令开销。
结合第一方面，在第一方面的某些实现方式中，该第一核心网网元为会话管理功能网元，该服务发现功能网元为边缘应用服务发现功能网元。
结合第一方面，在第一方面的某些实现方式中，该第一指示信息包括网络地址与数据网络标识信息的对应关系信息，该服务发现功能网元根据该第一指示信息和该多个DNS响应消息中的EAS地址信息确定该需查询的EAS对应相同的数据网络标识信息；该服务发现功能网元向该第一核心网网元上报一次该多个DNS响应消息中一个DNS响应消息对应的DNS信息报告。
结合第一方面，在第一方面的某些实现方式中，该服务发现功能缓存该多个DNS响应消息；该服务发现功能接收该第一核心网网元发送的第二指示信息，该第二指示信息包括对该多个DNS响应消息的处理规则；该服务发现功能根据该第二指示信息确定向该终端设备发送该多个DNS响应消息。
结合第一方面，在第一方面的某些实现方式中，服务发现功能网元接收DNS服务器发送的多个DNS响应消息之前，该方法还包括：该服务发现功能网元接收来自该第一核心网网元发送的该第一指示信息。
结合第一方面，在第一方面的某些实现方式中，该数据网络的标识信息包括以下信息中的至少一个：
该数据网络的数据网络接入标识符DNAI，该数据网络的数据网络名称DNN。
第二方面，提供一种获取边缘服务的方法，该方法包括，第一核心网网元向服务发现功能网元发送的第一指示信息，该第一指示信息用于指示该服务发现功能网元为多个DNS响应消息向该第一核心网网元发送一次DNS信息报告，该多个DNS响应消息包括终端设备需查询的EAS的地址信息；该第一核心网网元接收该DNS信息报告。
根据本申请实施例提供的方法，服务发现功能网元可以接收多个DNS查询消息，该多个DNS查询消息可能包括对应相同数据网络的多个EAS的标识信息，该服务发现功能网元可以根据第三指示信息确定为多个DNS查询消息向第一核心网网元只发送一次DNS信息报告，从而可以节省查询多个EAS的地址信息时的信令开销。
结合第二方面，在第二方面的某些实现方式中，该第一指示信息包括网络地址与数据网络标识信息的对应关系信息。
结合第二方面，在第二方面的某些实现方式中，该第一核心网网元向该服务发现功能网元发送第二指示信息，该第二指示信息包括对该多个DNS响应消息的处理规则，以使该服务发现功能根据该第二指示信息确定向该终端设备发送该多个DNS响应消息。
结合第二方面，在第二方面的某些实现方式中，该数据网络的标识信息包括以下信息中的至少一个：
该数据网络的数据网络接入标识符DNAI，该数据网络的数据网络名称DNN。
第三方面，提供一种获取边缘服务的方法，该方法包括服务发现功能网元接收来自终端设备的多个DNS查询消息，该多个DNS查询消息用于查询EAS的地址信息；该服务发现功能网元根据第三指示信息确定为该多个DNS查询消息向第一核心网网元发送一次DNS信息报告。
结合第三方面，在第三方面的某些实现方式中，该第三指示信息包括EAS的标识信息和数据网络标识信息的对应关系信息，该服务发现功能网元根据该第一指示信息确定该 多个DNS查询消息对应相同的数据网络标识信息；该服务发现功能网元向该第一核心网网元上报一次该多个DNS查询消息中一个DNS查询消息对应的DNS信息报告。
结合第三方面，在第三方面的某些实现方式中，该服务发现功能缓存该多个DNS查询消息；该服务发现功能接收该第一核心网网元发送的第四指示信息，该第四指示信息包括对该多个DNS查询消息的处理规则；该服务发现功能根据该第四指示信息确定向DNS服务器发送该多个DNS查询消息。
结合第三方面，在第三方面的某些实现方式中，该服务发现功能网元接收来自该第一核心网网元发送的该第三指示信息。
结合第三方面，在第三方面的某些实现方式中，该EAS的标识信息包括以下信息中的至少一个：EAS的统一资源标识符URI，EAS的实例标识符，EAS的全限定域名FQDN。
结合第三方面，在第三方面的某些实现方式中，该数据网络的标识信息包括以下信息中的至少一个：数据网络接入标识符DNAI，数据网络名称DNN。
第四方面，提供一种获取边缘服务的方法，该方法包括，第一核心网网元向服务发现功能网元发送的第三指示信息，该第三指示信息用于指示该服务发现功能网元为多个DNS查询消息向该第一核心网网元发送一次DNS信息报告，该多个DNS查询消息用于查询EAS的地址信息；该第一核心网网元接收该DNS信息报告。
结合第四方面，在第四方面的某些实现方式中，该第三指示信息包括EAS的标识信息和数据网络标识信息的对应关系信息。
结合第四方面，在第四方面的某些实现方式中，该第一核心网网元向该服务发现功能网元发送第四指示信息，该第四指示信息包括对该多个DNS查询消息的处理规则，该处理规则包括为该多个DNS查询消息构建客户端子网选项。
结合第四方面，在第四方面的某些实现方式中，该EAS的标识信息包括以下信息中的至少一个：EAS的统一资源标识符URI，EAS的实例标识符，EAS的全限定域名FQDN。
结合第四方面，在第四方面的某些实现方式中，该数据网络的标识信息包括以下信息中的至少一个：数据网络接入标识符DNAI，数据网络名称DNN。
第五方面，提供一种获取边缘服务的装置，该装置包括，收发单元，该收发单元用于接收DNS服务器发送的多个DNS响应消息，该多个DNS响应消息包括终端设备需查询的EAS的地址信息；处理单元，该处理单元用于根据第一指示信息确定为该多个DNS响应消息向第一核心网网元发送一次DNS信息报告。
结合第五方面，在第五方面的某些实现方式中，该第一核心网网元为会话管理功能网元。
结合第五方面，在第五方面的某些实现方式中，该第一指示信息包括网络地址与数据网络标识信息的对应关系信息，该处理单元具体用于根据该第一指示信息和该多个DNS响应消息确定该需查询的EAS对应相同的数据网络标识信息；该收发单元具体用于向该第一核心网网元上报一次该多个DNS响应消息中一个DNS响应消息对应的DNS信息报告。
结合第五方面，在第五方面的某些实现方式中，该装置还包括存储单元，该存储单元用于缓存该多个DNS响应消息；该收发单元具体用于接收该第一核心网网元发送的第二指示信息，该第二指示信息包括对该多个DNS响应消息的处理规则；该处理单元具体用 于根据该第二指示信息确定向该终端设备发送该多个DNS响应消息。
结合第五方面，在第五方面的某些实现方式中，该收发单元还用于接收来自该第一核心网网元发送的该第一指示信息。
结合第五方面，在第五方面的某些实现方式中，该数据网络的标识信息包括以下信息中的至少一个：该数据网络的数据网络接入标识符DNAI，该数据网络的数据网络名称DNN。
第六方面，提供一种获取边缘服务的装置，该装置包括收发单元，用于向服务发现功能网元发送的第一指示信息，该第一指示信息用于指示该服务发现功能网元为多个DNS响应消息向该第一核心网网元发送一次DNS信息报告，该多个DNS响应消息包括终端设备需查询的EAS的地址信息；该收发单元还用于接收该DNS信息报告。
结合第六方面，在第六方面的某些实现方式中，该第一指示信息包括网络地址与数据网络标识信息的对应关系信息。
结合第六方面，在第六方面的某些实现方式中，该收发单元还用于向该服务发现功能网元发送第二指示信息，该第二指示信息包括对该多个DNS响应消息的处理规则，以使该服务发现功能根据该第二指示信息确定向该终端设备发送该多个DNS响应消息。
结合第六方面，在第六方面的某些实现方式中，该数据网络的标识信息包括以下信息中的至少一个：该数据网络的数据网络接入标识符DNAI，该数据网络的数据网络名称DNN。
第七方面，提供一种获取边缘服务的装置，该装置包括收发单元，用于接收来自终端设备的多个DNS查询消息，该多个DNS查询消息用于查询EAS的地址信息；处理单元，用于根据第三指示信息确定为该多个DNS查询消息向第一核心网网元发送一次DNS信息报告。
结合第七方面，在第七方面的某些实现方式中，该第三指示信息包括EAS的标识信息和数据网络标识信息的对应关系信息，该处理单元具体用于根据该第一指示信息确定该多个DNS查询消息对应相同的数据网络标识信息；该收发单元还用于向该第一核心网网元上报一次该多个DNS查询消息中一个DNS查询消息对应的DNS信息报告。
结合第七方面，在第七方面的某些实现方式中，该装置还包括存储单元，用于缓存该多个DNS查询消息；该收发单元还用于接收该第一核心网网元发送的第四指示信息，该第四指示信息包括对该多个DNS查询消息的处理规则；该处理单元具体用于根据该第四指示信息确定向DNS服务器发送该多个DNS查询消息。
结合第七方面，在第七方面的某些实现方式中，该收发单元具体用于接收来自该第一核心网网元发送的该第三指示信息。
结合第七方面，在第七方面的某些实现方式中，该EAS的标识信息包括以下信息中的至少一个：EAS的统一资源标识符URI，EAS的实例标识符，EAS的全限定域名FQDN。
结合第七方面，在第七方面的某些实现方式中，该数据网络的标识信息包括以下信息中的至少一个：数据网络接入标识符DNAI，数据网络名称DNN。
第八方面，提供一种获取边缘服务的装置，该装置包括收发单元，用于向服务发现功能网元发送的第三指示信息，该第三指示信息用于指示该服务发现功能网元为多个DNS查询消息向该第一核心网网元发送一次DNS信息报告，该多个DNS查询消息用于查询 EAS的地址信息；该收发单元还用于接收该DNS信息报告。
结合第八方面，在第八方面的某些实现方式中，该第三指示信息包括EAS的标识信息和数据网络标识信息的对应关系信息。
结合第八方面，在第八方面的某些实现方式中，该收发单元还用于向该服务发现功能网元发送第四指示信息，该第四指示信息包括对该多个DNS查询消息的处理规则，该处理规则包括为该多个DNS查询消息构建客户端子网选项。
结合第八方面，在第八方面的某些实现方式中，该EAS的标识信息包括以下信息中的至少一个：EAS的统一资源标识符URI，EAS的实例标识符，EAS的全限定域名FQDN。
结合第八方面，在第八方面的某些实现方式中，该数据网络的标识信息包括以下信息中的至少一个：数据网络接入标识符DNAI，数据网络名称DNN。
第九方面，提供了一种获取边缘服务的装置，该装置可以是服务发现功能网元，该装置也可以是芯片。该装置具有实现上述第一方面或第三方面中任一方面或任一方面中任意可能的实现方式中服务发现功能网元的功能。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块或单元。
第十方面，提供了一种获取边缘服务的装置，该装置可以是第一核心网网元，例如，会话管理功能网元；该装置也可以是芯片。该装置具有实现上述第二方面或第四方面中任一方面或任一方面中任意可能的实现方式中第二网元的功能。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块或单元。
第十一方面，提供了一种获取边缘服务的装置，包括处理器；该处理器与存储器耦合，可用于执行存储器中的指令，以实现上述第一方面或第三方面中任一方面或任一方面中任意可能的实现方式中服务发现功能网元的功能。可选地，该装置还包括存储器。可选地，该装置还包括通信接口，处理器与通信接口耦合。
第十二方面，提供了一种获取边缘服务的装置，包括处理器。该处理器与存储器耦合，可用于执行存储器中的指令，以实现上述第二方面或第四方面中任一方面或任一方面中任意可能的实现方式中第二网元的功能，第二网元例如可以是移动管理网元。可选地，该装置还包括存储器。可选地，该装置还包括通信接口，处理器与通信接口耦合。
在一种实现方式中，该装置为第一核心网网元，例如SMF。当该装置SMF时，该通信接口可以是收发器，或，输入/输出接口。
在另一种实现方式中，该装置为配置于SMF网元中的芯片。当该装置为配置于SMF网元中的芯片时，该通信接口可以是输入/输出接口。
可选地，所述收发器可以为收发电路。可选地，所述输入/输出接口可以为输入/输出电路。
第十三方面，提供了一种处理器，包括：输入电路、输出电路和处理电路。所述处理电路用于通过所述输入电路接收信号，并通过所述输出电路发射信号，使得所述处理器执行上述第一方面至第四方面中任一方面或任一方面中任一种可能实现方式中的方法。
在具体实现过程中，上述处理器可以为芯片，输入电路可以为输入管脚，输出电路可以为输出管脚，处理电路可以为晶体管、门电路、触发器和各种逻辑电路等。输入电路所接收的输入的信号可以是接收器接收并输入的，输出电路所输出的信号可以输出给发射器 并由发射器发射的，且输入电路和输出电路可以是同一电路，该电路在不同的时刻分别用作输入电路和输出电路。本申请实施例对处理器及各种电路的具体实现方式不做限定。
第十四方面，提供了一种装置，包括处理器和存储器。该处理器用于读取存储器中存储的指令，并可通过接收器接收信号，通过发射器发射信号，以执行第一方面至第四方面中任一方面或者任一方面中任一种可能实现方式中的方法。
可选地，所述处理器为一个或多个，所述存储器为一个或多个。
可选地，所述存储器可以与所述处理器集成在一起，或者所述存储器与处理器分离设置。
在具体实现过程中，存储器可以为非瞬时性(non-transitory)存储器，例如只读存储器(read only memory，ROM)，其可以与处理器集成在同一块芯片上，也可以分别设置在不同的芯片上，本申请实施例对存储器的类型以及存储器与处理器的设置方式不做限定。
应理解，相关的数据交互过程例如发送指示信息可以为从处理器输出指示信息的过程，接收能力信息可以为处理器接收输入能力信息的过程。具体地，处理输出的数据可以输出给发射器，处理器接收的输入数据可以来自接收器。其中，发射器和接收器可以统称为收发器。
上述第十四方面中的装置可以是芯片，该处理器可以通过硬件来实现也可以通过软件来实现，当通过硬件实现时，该处理器可以是逻辑电路、集成电路等；当通过软件来实现时，该处理器可以是一个通用处理器，通过读取存储器中存储的软件代码来实现，该存储器可以集成在处理器中，可以位于该处理器之外，独立存在。
第十五方面，提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序(也可以称为代码，或指令)，当所述计算机程序被运行时，使得计算机执行上述第一方面至第四方面中任一方面或任一方面中任一种可能实现方式中的方法。
第十六方面，提供了一种计算机可读介质，所述计算机可读介质存储有计算机程序(也可以称为代码，或指令)，当其在计算机上运行时，使得计算机执行上述第一方面至第四方面中任一方面或任一方面中任一种可能实现方式中的方法。
第十七方面，提供了一种芯片系统，包括处理器，用于从存储器中调用并运行计算机程序，使得安装有该芯片系统的设备执行上述第一方面至第四方面任一方面或任一方面中任一种可能实现方式中的方法。
附图说明
图1是本申请实施例适用系统架构图。
图2是本申请实施例边缘业务架构示意图。
图3是现有的获取边缘服务的方法300的示意性流程图。
图4是本申请提供的获取边缘服务的方法400的示意性流程图。
图5是本申请提供的获取边缘服务的方法500的示意性流程图。
图6是本申请提供的获取边缘服务的方法600的示意性流程图。
图7是本申请提供的获取边缘服务的方法700的示意性流程图。
图8是本申请提供的获取边缘服务的装置100的示意性框图。
图9是本申请提供的获取边缘服务的装置200的示意性框图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
本申请实施例提及的无线通信系统包括但不限于：全球移动通信(global system of mobile communication，GSM)系统、长期演进(long term evolution，LTE)频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)、LTE系统、先进的长期演进(LTE-Advanced，LTE-A)系统、下一代通信系统(例如，6G通信系统)、多种接入系统的融合系统，或演进系统。
本申请提供的技术方案还可以应用于机器类通信(machine type communication，MTC)、机器间通信长期演进技术(Long Term Evolution-machine，LTE-M)、设备到设备(device to device，D2D)网络、机器到机器(machine to machine，M2M)网络、物联网(internet of things，IoT)网络或者其他网络。其中，IoT网络例如可以包括车联网。车联网系统中的通信方式统称为车到其他设备(vehicle to X，V2X，X可以代表任何事物)，例如，该V2X可以包括：车辆到车辆(vehicle to vehicle，V2V)通信，车辆与基础设施(vehicle to infrastructure，V2I)通信、车辆与行人之间的通信(vehicle to pedestrian，V2P)或车辆与网络(vehicle to network，V2N)通信等。
本申请实施例中所涉及到的终端设备可以包括各种具有无线通信功能的接入终端、移动设备、用户终端或用户装置。例如，终端设备可以为用户设备(user equipment，UE)，例如，手机(mobile phone)、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备等。终端设备也可是工业控制(industrial control)中的无线终端、机器类型通信(machine type communication，MTC)终端、客户终端设备(customer premise equipment，CPE)、无人驾驶(self-driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)、蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备，5G网络中的终端设备或者未来演进的公用陆地移动通信网络(public land mobile network，PLMN)中的终端设备等。
下面结合图1和图2详细介绍本申请实施例涉及网络系统架构以及该架构下的边缘业务架构。
图1是适用于本申请的一例无线通信系统架构的示意性框图，如图所示，该系统架构具体可以包括下列网元：
1、(无线)接入网((radio)access network，(R)AN)：基于无线通信技术实现接入网络功能的接入网可以称为无线接入网。无线接入网能够管理无线资源，为终端提供接入服务，进而完成控制信号和用户数据在终端和核心网之间的转发。
本申请所涉及的无线接入网设备可以是具有无线收发功能的设备。该无线接入网设备可以是提供无线通信功能服务的设备，通常位于网络侧，包括但不限于：第五代(5th  generation，5G)通信系统中的下一代基站(gNodeB，gNB)、第六代(6th generation，6G)移动通信系统中的下一代基站、未来移动通信系统中的基站或WiFi系统中的接入节点等，LTE系统中的演进型节点B(evolved node B，eNB)、无线网络控制器(radio network controller，RNC)、节点B(node B，NB)、基站控制器(base station controller，BSC)、家庭基站(例如，home evolved NodeB，或home Node B，HNB)、基带单元(base band unit，BBU)，传输接收点(transmission reception point，TRP)、发射点(transmitting point，TP)、基站收发台(base transceiver station，BTS)等。在一种网络结构中，该接入网设备可以包括集中单元(centralized unit，CU)节点、或分布单元(distributed unit，DU)节点、或包括CU节点和DU节点的RAN设备、或者控制面CU节点和用户面CU节点，以及DU节点的RAN设备。接入网设备为小区提供服务，用户设备通过该小区使用的传输资源(例如，频域资源，或者说，频谱资源)与基站进行通信，该小区可以是基站(例如基站)对应的小区，小区可以属于宏基站，也可以属于小小区(small cell)对应的基站，这里的小小区可以包括：城市小区(metro cell)、微小区(micro cell)、微微小区(pico cell)、毫微微小区(femto cell)等，这些小小区具有覆盖范围小、发射功率低的特点，适用于提供高速率的数据传输服务。无线接入网设备可以是宏基站，也可以是微基站或室内站，还可以是中继节点或施主节点，V2X通信系统中的为用户设备提供无线通信服务的设备、云无线接入网络(cloud radio access network，CRAN)场景下的无线控制器、中继站、车载设备、可穿戴设备以及未来演进网络中的网络设备等。本申请的实施例对无线接入网设备所采用的具体技术和设备具体形态不做限定。
2、用户面功能网元(user plane function，UPF)：可用于分组路由和转发、或用户面数据的服务质量(quality of service，QoS)处理等。用户数据可通过该网元接入到数据网络(data network，DN)。
3、数据网络(data network，DN)140：用于提供传输数据的网络。
4、接入和移动性管理功能网元(access and mobility management function，AMF)：用于移动性管理和接入管理等，可以用于实现移动性管理实体(mobility management entity，MME)功能中除会话管理之外的其它功能，例如，合法监听、或接入授权/鉴权等功能。
5、会话管理功能网元(session management function，SMF)160：主要用于会话管理、终端设备的网络互连协议(internet protocol，IP)地址分配和管理、选择可管理用户平面功能、策略控制和收费功能接口的终结点以及下行数据通知等。
6、网络开放网元(network exposure function，NEF)180：主要用于安全地向外部开放由第三代合作伙伴计划(3GPP)网络功能提供的业务和能力等。
7、策略控制网元(policy control function，PCF)：用于指导网络行为的统一策略框架，为控制平面功能网元(例如AMF，SMF网元等)提供策略规则信息等。
8、应用功能网元(application function，AF)1110：用于进行应用影响的数据路由，接入网络开放功能网元，与策略框架交互进行策略控制等。
另外，上述网络架构还包括网络切片选择功能网元(network slice selection function，NSSF)，用于管理网络切片相关的信息；网络存储功能网元(network repository function，NRF)，用于保存网络功能实体以及其提供服务的描述信息，以及支持服务发现，网元实 体发现等功能。
在该网络架构中，N2接口为RAN和AMF网元的接口，用于非接入层(non-access stratum，NAS)消息的发送等；N3接口为RAN和UPF网元之间的接口，用于传输用户面的数据等；N4接口为SMF网元和UPF网元之间的接口，用于传输例如N3连接的隧道标识信息，数据缓存指示信息，以及下行数据通知消息等信息。
可以理解的是，上述网元或者功能既可以是硬件设备中的网络元件，也可以是在专用硬件上运行软件功能，或者是平台(例如，云平台)上实例化的虚拟化功能。
为方便说明，本申请后续，以接入管理功能网元为AMF网元，会话管理网元为SMF网元，策略控制网元为PCF网元为例进行说明。
进一步地，将AMF网元简称为AMF，SMF网元简称为SMF，PCF网元简称为PCF。即本申请后续所描述的AMF均可替换为接入管理功能网元，SMF均可替换为会话管理网元，PCF均可替换为策略控制网元。
为方便说明，本申请，以装置为AMF实体、SMF实体、PCF实体为例，对用于信息传输的方法进行说明，对于装置为AMF实体内的芯片、SMF实体内的芯片或为PCF实体内的芯片的实现方法，可参考装置分别为AMF实体、SMF实体、PCF实体的具体说明，不再重复介绍。
在图1所示的网络架构中，UE通过N1接口与AMF连接，RAN通过N2接口与AMF连接，RAN通过N3接口与UPF连接。
UPF之间通过N9接口连接，UPF通过N6接口与数据网络(data network，DN)互联。
SMF通过N4接口控制UPF。
图1中N1、N2、N3、N4等为接口序列号。这些接口序列号的含义可参见目前标准协议中定义的含义，在此不做限制。
应理解，上述应用于本申请实施例的网络架构仅是举例说明的从传统点到点的架构和服务化架构的角度描述的网络架构，适用本申请实施例的网络架构并不局限于此，任何能够实现上述各个网元的功能的网络架构都适用于本申请实施例。
图2示出了本申请实施例应用的系统架构或场景示意图，该系统也可以看作在上述网络架构中可以引入对边缘计算(edge computing)的支持。
如图2所示，该系统架构中包括边缘应用服务器(edge application server，EAS)，EAS为部署在边缘数据网络(edge data network，EDN)中的边缘应用服务器，也可以称为边缘应用(服务器)、应用实例、边缘应用实例、多接入边缘计算(multi-access edge computing，MEC)应用(服务器)、EAS功能等。该边缘应用还可以称为“应用实例”，具体指一个服务器应用程序(例如，社交媒体软件、增强现实(augmented reality，AR)、虚拟现实(virtual reality，VR))部署运行在EDN的实例(instance)。一个应用可在一个或多个EDN中部署一个或多个EAS，部署运行在不同的EDN中的EAS可以认为是一个应用的不同的EAS，它们可以共享一个域名，也可以与部署在云上的应用使用不同的域名，该域名可以是全限定域名(fully qualified domain name，FQDN)，可以使用一个任意播放的互联网协议(internet protocol，IP)地址，也可以使用不同的IP地址。
其中，该边缘数据网络可以是本地(local)数据网络，local DN可以由数据网络接入 标识符(data network access identifier，DNAI)和数据网络名称(data network name,DNN)标识，是网络逻辑概念。
该系统架构中还包括边缘应用服务发现功能(edge application server discovery function，EASDF)网元，EASDF可以包括以下一种或多种功能：
向NRF注册以进行EASDF发现和选择；根据SMF的指示处理域名系统(domain name system，DNS)消息，包括从SMF接收DNS消息处理规则，交换来自UE的DNS消息，将DNS消息转发到中央DNS(central DNS，C-DNS)解析器/服务器(resolver/server)或本地DNS(L-DNS)解析器/服务器以进行DNS查询。其次，EASDF还可以通过N6接口与UPF建立用户平面连接，传输与UE交换的DNS信令。EADSF可以与一个或多个local DN直接连接。其中，一个DNS服务器(resolver/server)可由5GC运营商或者包括local DN内的第三方本地部署，用于将UE的DNS查询解析为local DN中合适的EAS IP地址。DNS服务器可以部署在网络中的不同位置，作为中央DNS(C-DNS)服务器或本地DNS(L-DNS)服务器，L-DNS可能会或可能不会与C-DNS连接，具体取决于部署。
当终端设备需要进行业务传输时，可以通过SMF建立多条到同一个DN或不同DN的协议数据单元(protocol data unit，PDU)会话(session)。在建立到同一个DN的多个PDU会话时，需要通过不同的UPF。SMF可以控制PDU的数据路由使得此PDU会话可同时有多个N6接口，连接每个N6接口的UPF称为PDU会话锚点(PDU session anchor，PSA)UPF，每个PAS提供了一条到同一个DN的不同路径。
对于不同类型的PDU会话，SMF可以在该PDU会话的数据传输路径中插入一个上行分类器(uplink classifier，UL CL)。该UL CL功能由UPF提供，用于将满足业务过滤规则的数据包转发到指定的路径。当一个UL CL被插入到一个PDU会话数据通道时，这条PDU会话就可以有多个PDU会话锚点，提供接入到同一个DN的多条不同的路径。也就是说，UL CL的功能可以是传输上行数据到不同的PSA，并将下行数据合并到UE。或者，各个PSA对应的数据还可以汇聚于一个公共的UPF，这个公共的UPF具有分支点(branching point，BP)的功能。分支点向上将上行数据转发到不同的PSA，向下将来自PSA的下行数据合并。
在图2所述的系统架构中，UPF(UL CL/BP)可以表示提供UL CL功能的UPF或者公共的UPF，即该UPF可以是传输上行数据到不同的PSA，例如，UPF(PSA2)以及UPF(PSA1)，并将下行数据合并到UE。
终端设备要使用边缘应用，需要通过基于DNS的服务发现机制来获取EAS的IP地址。如图3所示，终端设备获取EAS的IP地址可以通过如下步骤：
S301，PDU会话建立过程。
PDU会话建立过程包括建立UE到UPF之间用户面路径的会话，具体流程为现有技术，在此不再赘述。
S302，在PDU会话建立过程中，SMF选择EASDF。
S303，SMF向该选择的EASDF发送DNS上下文创建请求(Neasdf_DNSContext_Create Request)。该DNS上下文创建请求中可以包括终端设备的IP地址、回调URI，以及DNS消息处理规则，EASDF可以根据该请求消息为PDU会话创建DNS上下文并将UE IP地 址、回调URI和DNS消息处理规则存储到上下文中。
相应地，S304，EASDF向SMF发送DNS上下文创建响应。
S305，SMF向EASDF发送DNS上下文更新请求(Neasdf_DNSContext_UpdateRequest)。
该更新请求消息可以由终端设备的移动性触发，或者，该更新请求消息也可以由PSA的插入或移除触发。该更新请求消息中可以包括EASDF上下文ID，以及DNS消息处理规则。
相应地，S306，EASDF向SMF发送DNS上下文更新响应。
S310，终端设备向EASDF发送DNS查询消息。
S320，如果该DNS查询消息匹配用于报告的DNS消息处理规则，则EASDF通过调用DNS上下文通知请求(Neasdf_DNSContext_Notify Request)将DNS消息报告发送到SMF。
S330，SMF向EASDF发送DNS上下文通知响应(Neasdf_DNSContext_Notify Response)。
可选地，如果需要更新报告中收到的FQDN的DNS消息处理规则，例如，提供更新信息以构建EDNS客户端子网选项(EDNS Client Subnet option，ECS)信息，则S340，SMF向EASDF发送DNS上下文更新请求(Neasdf_DNSContext_Update Request)。该更新请求中可以包括DNS消息处理规则。
其中，ECS(EDNS-Client-Subnet)是DNS服务支持的新协议，该协议会在DNS请求包中附加用户IP地址。这样，DNS服务器可以根据该用户IP地址而不是递归服务器的IP地址返回给用户更近的服务器IP地址，使客户能够实现就近访问。
相应地，S340，EASDF向SMF发送DNS上下文更新响应(Neasdf_DNSContext_Update Response)。
S350，EASDF处理接收的DNS查询消息。
EASDF可以在DNS查询消息中添加ECS option，并将该DNS查询消息发送至C-DNS服务器。或者，EASDF还可以将该DNS查询消息发送至Local DNS服务器。
S360，EASDF向DNS服务器发送该DNS查询请求。
S370，EASDF接收DNS服务器发送的DNS响应(DNS response)。
S380，EASDF通过触发DNS上下文通知请求(Neasdf_DNSContext_Notify request)向SMF发送DNS消息报告。
S390，SMF向EASDF发送DNS上下文通知响应(Neasdf_DNSContext_Notify Response)。
可选地，S3100，SMF还可以执行插入UL CL/BP。
根据从EASDF接收的EAS信息(例如，EAS IP地址)，SMF可以确定DNAI并确定DNAI的关联N6流量路由信息，SMF可以执行UL CL/BP和本地PSA选择和插入，为UE完成数据面路径的建立。
在UE的数据面路径建立之后，S3110，SMF可以向EASDF发送DNS上下文更新请求(Neasdf_DNSContext_Update Request)。该请求消息中可以包括DNS消息处理规则，
相应地，S3120，EASDF向SMF发送DNS上下文更新响应(Neasdf_DNSContext_Update  Response)。
S3130，EASDF将DNS response消息发送至终端设备。
在现在的网络业务中，同一个边缘服务可能会涉及不止一个FQDN，因此，终端设备在访问边缘服务时会同时发出多个DNS查询请求，同时，EASDF向DNS服务器发送的多个DNS查询请求并接收多个DNS response，多个DNS response会触发EASDF向SMF发起多个DNS消息报告，以使SMF选择DNAI并插入ULCL/BP。但是，由于这些DNS response返回结果中的EAS通常在同一个DN中，EASDF向SMF发起多个DNS消息报告可能会造成信令资源的浪费。
有鉴于此，本申请提供了一种获取边缘服务的方法，在该方法中，服务发现功能网元可以通过指示信息确定具体的消息发送策略，从而可以节省获取边缘服务中的信令开销。
下面将结合附图详细说明本申请实施例提供的方法。需要说明的是，在下文中结合附图描述实施例的过程中，图中仅为便于理解而示意，不应对本申请构成任何限定。各网元名称仅为区分不同的功能而定义，不应对本申请构成任何限定。本申请并不排除定义其他网元来实现相同或相似功能的可能。
图4是本申请提供的一种获取边缘服务的方法400的示意性框图。该方法至少包括以下几个步骤。
S410，服务发现功能网元接收DNS服务器发送的多个DNS响应(DNS Response)消息。
其中，该服务发现功能网元可以包括EASDF网元，该多个DNS响应消息终端设备发送的多个DNS查询(DNS Query)请求消息的响应，该多个DNS响应消息该包括终端设备需查询的EAS的地址信息。
该EAS地址信息可以包括同一个边缘服务的多个EAS的地址信息，或者，该EAS地址信息还可以是不同边缘服务对应的多个EAS地址信息。
S420，该服务发现功能网元根据第一指示信息确定为该多个DNS响应消息向第一核心网网元发送一次DNS信息报告。
该服务发现功能网元根据第一指示信息确定为该多个DNS响应消息向第一核心网网元发送一次DNS信息报告可以包括，该服务发现功能网元根据第一指示信息向该第一核心网网元上报该多个DNS响应消息中的一个DNS响应消息对应的DNS信息报告，该一个DNS响应消息例如可以包括服务发现功能网元接收到的第一个DNS响应消息。该第一核心网网元可以是会话管理功能网元，该DNS信息报告用于触发会话管理功能网元发送针对该多个DNS响应消息的处理规则。
该第一指示信息可以包括该网络地址信息和数据网络的对应关系。例如，该第一指示信息可以包括网络地址信息和数据网路的标识信息的对应关系表。
该网络地址信息可以是IP地址；该数据网路的标识信息可以包括数据网络接入标识符DNAI和/或数据网络名称DNN。应理解，相同的边缘服务可以对应不同的EAS的标识信息，且不同的EAS的标识信息可以对应相同的数据网络的标识信息。该数据网络可以是local DN。
需要说明的是，以上仅仅是对标识信息的举例，不应对本申请造成任何限定，本申请并未排除标识信息还可以是其它任何可以获取边缘服务器地址信息的信息。
在一种可能的实现方式中，服务发现功能网元接收该多个DNS响应消息，该多个DNS响应消息包括EAS的地址信息，服务发现功能网元可以根据该EAS的地址信息以及网络地址信息和数据网络的对应关系确定该EAS的地址信息对应的数据网络，若该EAS地址信息对应相同的数据网络，则服务发现功能网元确定为该多个DNS响应消息上报一次DNS信息报告。
示例性地，该第一指示信息可以配置在该服务发现功能网元中，或者，该服务发现功能网元还可以接收该第一核心网网元发送的该第一指示信息。例如，该服务发现功能网元可以在PDU会话建立过程中接收该第一指示信息，该服务发现功能网元接收SMF发送的DNS上下文创建请求(Neasdf_DNSContext_Create Request)，该请求消息中包括该第一指示信息。或者，该服务发现功能网元还可以在DNS上下文更新流程中接收该第一指示信息，例如，EASDF接收SMF发送的DNS上下文更新请求(Neasdf_DNSContext_Update Request)，其中包括该第一指示信息。或者，EASDF还可以终端设备发送DNS查询请求之前的任意时刻接收该第一指示信息。
可选地，该方法还可以包括S430，该服务发现功能网元缓存该多个DNS响应消息。
该服务发现功能网元可以缓存该多个DNS响应消息，后续，该服务发现功能网元可以根据第一核心网网元发送的DNS处理规则确定向终端设备发送该多个DNS响应消息中的全部或部分。
可选地，该方法还可以包括S440，该服务发现功能网元接收第一核心网网元发送的第二指示信息，该第二指示信息包括对所述多个DNS响应消息的DNS处理规则。
示例性地，该DNS处理规则可以用于指示该服务发现功能网元向终端设备发送已缓存的所述多个DNS响应消息，或者用于指示该服务发现功能网元向终端设备设备发送指定EAS地址范围的DNS响应消息；或者，该DNS处理规则还可以用于指示该服务发现功能网元不缓存该多个DNS响应之后的第一DNS响应消息，该第一DNS响应消息同样是对该终端设备发送的多个DNS查询请求消息的响应；或者，该DNS处理规则还可以包括指示该服务发现功能网元丢弃该多个DNS响应之后的该第一DNS响应消息。
S450，该服务发现功能网元向该终端设备发送该多个DNS响应消息。
根据本申请实施例提供的方法，服务发现功能网元可以接收多个DNS响应消息，该多个DNS响应消息可能包括对应相同数据网络的多个EAS地址信息，该服务发现功能网元可以根据第一指示信息确定为多个DNS响应消息向第一核心网网元只发送一次DNS信息报告，从而可以节省查询多个EAS的地址信息时的信令开销。
图5是本申请提供的一种获取边缘服务的方法500的示意性框图。该方法至少包括以下几个步骤。
S510，服务发现功能网元接收终端设备发送的多个DNS查询(DNS Query)消息。
该多个DNS查询消息该用于该终端设备获取边缘服务的EAS的地址信息。该EAS地址信息可以包括同一个边缘服务的多个EAS的地址信息，或者，该EAS地址信息还可以是不同边缘服务对应的多个EAS地址信息。
S520，该服务发现功能网元根据第三指示信息确定为该多个DNS查询消息向第一核心网网元发送一次DNS信息报告。
该服务发现功能网元根据第三指示信息确定为该多个DNS查询消息向第一核心网网 元发送一次DNS信息报告可以包括，该服务发现功能网元根据第三指示信息向该第一核心网网元上报该多个DNS查询消息中的一个DNS查询消息对应的DNS信息报告，该一个DNS查询消息例如可以包括服务发现功能网元接收到的第一个DNS查询消息。该第一核心网网元可以是会话管理功能网元，该DNS信息报告用于触发会话管理功能网元发送针对该多个DNS查询消息的DNS处理规则。
该第三指示信息可以包括该EAS的标识信息和数据网络的对应关系。例如，该第一指示信息可以包括EAS的标识信息和数据网络标识信息的对应关系表。
该EAS的标识信息还可以包括以下信息中的至少一种，EAS的统一资源标识符(uniform resource identifier，URI)、EAS的实例标识符(instance ID)，EAS的FQDN。应理解，根据该EAS的标识消息可以获取EAS的地址信息。该数据网路的标识信息和S420中类似，在此不再赘述。
需要说明的是，以上仅仅是对标识信息的举例，不应对本申请造成任何限定，本申请并未排除标识信息还可以是其它任何可以获取边缘服务器地址信息的信息。
在一种可能的实现方式中，该多个DNS查询消息包括需查询EAS的标识信息，服务发现功能网元可以根据该需查询的EAS的标识信息，以及EAS标识信息和数据网络的对应关系确定该需查询的EAS的标识信息对应的数据网络，若该需查询的EAS的标识信息对应相同的数据网络，则服务发现功能网元确定为该多个DNS查询消息上报一次DNS信息报告。
示例性地，该第三指示信息可以配置在该服务发现功能网元中，或者，该服务发现功能网元还可以接收该第一核心网网元发送的该第三指示信息。例如，该服务发现功能网元可以在PDU会话建立过程中接收该第三指示信息，该服务发现功能网元接收SMF发送的DNS上下文创建请求(Neasdf_DNSContext_Create Request)，该请求消息中包括该第三指示信息。或者，该服务发现功能网元还可以在DNS上下文更新流程中接收该第三指示信息，例如，EASDF接收SMF发送的DNS上下文更新请求(Neasdf_DNSContext_Update Request)，其中包括该第三指示信息。或者，EASDF还可以终端设备发送DNS查询请求之前的任意时刻接收该第三指示信息。在另一种可能的实现方式中，该第三指示信息可以和上述第一指示信息包括在同一个信息中，例如，第一信息，第一核心网网元可以通过发送该第一信息同时向该服务发现功能网元发送该第一指示信息和第三指示信息。
可选地，该方法还可以包括S530，该服务发现功能网元缓存该多个DNS查询消息。
该服务发现功能网元可以缓存该多个DNS查询消息，后续，该服务发现功能网元可以根据第一核心网网元发送的DNS处理规则对该DNS查询消息进行处理，例如，构建EDNS客户端子网选项信息。
可选地，该方法还可以包括S540，接收该第一核心网网元发送的第四指示信息，该第四指示信息包括DNS处理规则。
S550，该服务发现功能网元向DNS服务器发送该多个DNS查询请求，以获取该多个DNS查询请求对应的DNS响应消息，该DNS响应消息包括终端设备需查询的EAS的地址信息。
S560，该服务发现功能网元向该终端设备发送该多个DNS响应消息。
根据本申请实施例提供的方法，服务发现功能网元可以接收多个DNS查询消息，该 多个DNS查询消息可能对应相同的数据网络，该服务发现功能网元可以根据第三指示信息确定为多个DNS查询消息向第一核心网网元只发送一次DNS信息报告，从而可以节省查询多个EAS的地址信息时的信令开销。
下面结合图6和图7详细介绍本申请实施例提供的获取边缘服务的方法。
图6是本申请提供的另一种获取边缘服务的方法600的示意性流程图，图6所示的方法600可以由图1所示的系统中的SMF、EASDF、UDM(ULCL/BP)和UDM(PSA)等网元执行。如图6所示，该方法包括步骤S610至S6110。
可选地，S610，SMF向EASDF发送第一指示信息，相应地，EASDF接收该第一指示信息。该第一指示信息和S420中类似，在此不再赘述。
S620，EASDF接收终端设备发送的多个DNS查询消息。
该多个DNS查询消息可以用于获取对应相同数据网络标识的EAS的地址信息，其中数据网络的标识信息和S420中类似。
S630，EASDF向DNS服务器发送该多个DNS查询消息。
S640，EASDF接收DNS服务器发送的用于响应该多个DNS查询消息的DNS响应消息。
S650，EASDF缓存该多个DNS响应消息，并根据该第一指示信息确定为该多个DNS响应消息向第一核心网网元发送一次DNS信息报告。
S660，EASDF向SMF发送DNS信息报告(DNS上下文通知请求)。
S670，EASDF接收该DNS信息报告的响应消息(DNS上下文通知响应)。
S680，SMF根据该DNS信息报告为该终端设备建立数据面路径。
S690，SMF向EASDF发送第二指示信息，该第二指示信息可以包括DNS处理规则。
示例性地，SMF可以通过DNS上下文更新请求(Neasdf_DNSContext_Update Request)消息发送该第二指示信息。
该DNS处理规则可以用于指示该服务发现功能网元向终端设备发送该DNS响应消息的策略，例如，发送EASDF缓存的该多个DNS响应消息，或者，发送指定EAS地址范围的DNS响应消息，该第二指示信息中可以包括EAS IP地址范围信息、指定的DANI或者指定的FQDN；或者，还可以用于指示该服务发现功能网元不缓存该多个DNS响应之后的第一DNS响应消息，该第一DNS响应消息同样是对该终端设备发送的多个DNS查询请求消息的响应；或者，该DNS处理规则还可以包括指示该服务发现功能网元丢弃该多个DNS响应之后的该第一DNS响应消息。
S6100，SMF接收EASDF发送响应消息，该响应信息可以是DNS上下文更新响应(Neasdf_DNSContext_Update Response)。
S6110，EASDF向终端设备发送DNS响应消息。
图7是本申请提供的另一种获取边缘服务的方法700的示意性流程图，图7所示的方法700可以由图1所示的系统中的SMF、EASDF、UDM(ULCL/BP)和UDM(PSA)等网元执行。如图7所示，该方法包括步骤S710至S7110。
可选地，S710，SMF向EASDF发送第三指示信息，相应地，EASDF接收该第三指示信息。该第三指示信息和S520中类似，在此不再赘述。
S720，EASDF接收终端设备发送的多个DNS查询消息。
该多个DNS查询消息可以用于获取对应相同数据网络标识的EAS的地址信息，其中数据网络的标识信息和S420中类似。
S730，EASDF缓存该多个DNS查询消息；
S740，EASDF根据该第三指示信息确定为该多个DNS查询消息向第一核心网网元发送一次DNS信息报告(DNS上下文通知请求)。
S750，EASDF接收该DNS信息报告的响应消息(DNS上下文通知响应)。
S760，SMF向EASDF发送第四指示信息，该第四指示信息可以包括DNS处理规则。例如，该DNS处理规则可以包括构建EDNS客户端子网选项信息。
示例性地，SMF可以通过DNS上下文更新请求(Neasdf_DNSContext_Update Request)消息发送该第二指示信息。
S770，EASDF接收DNS上下文更新响应(Neasdf_DNSContext_Update Response)消息。
可选地，S780，EASDF为缓存的DNS查询消息构建EDNS客户端子网选项信息。
S790，EASDF向DNS服务器发送该多个DNS查询消息。
S7100，EASDF接收DNS服务器发送的用于响应该多个DNS查询消息的DNS响应消息。
S7110，DNS响应消息的处理过程，该处理过程和S680中类似。
S7120，EASDF向终端设备发送DNS响应消息。
需要说明的是，本申请中的为了便于清楚描述本申请实施例的技术方案，在本申请的实施例中，采用了“第一”、“第二”等字样对功能和作用基本相同的相同项或相似项进行区分。例如，第一信息和第二信息仅仅是为了区分不同的信息，并不对其先后顺序进行限定。本领域技术人员可以理解“第一”、“第二”等字样并不对数量和执行次序进行限定，并且“第一”、“第二”等字样也并不限定一定不同。
以上，结合图4至图7详细说明了本申请实施例提供的获取边缘服务的方法。下面结合图8和图9介绍本申请实施例提供装置。应理解，装置实施例的描述与方法实施例的描述相互对应，因此，未详细描述的内容可以参见上文方法实施例，为了简洁，这里不再赘述。
上述主要从各个节点之间交互的角度对本申请实施例提供的方案进行了介绍。可以理解的是，各个节点，例如终端设备或者网络设备，为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
本申请实施例可以根据上述方法示例对终端设备或者终端设备进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。需要说明的是，本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。下面以采用对应各个功能划分各个功能模块为 例进行说明。
图8是本申请实施例提供装置100的示意性框图。如图所示，该装置100可以包括：收发单元110和处理单元120。
在一种可能的设计中，该装置100可以是上文方法实施例中的服务发现功能网元，也可以是用于实现上文方法实施例中服务发现功能网元的功能的芯片。应理解，该装置100可对应于根据本申请实施例的方法400、方法500、方法600和方法700中的服务发现功能网元，该装置100可以执行本申请实施例的方法400、方法500、方法600和方法700中的服务发现功能网元所对应的步骤。应理解，各单元执行上述相应步骤的具体过程在上述方法实施例中已经详细说明，为了简洁，在此不再赘述。
具体地，收发单元用于接收DNS服务器发送的多个DNS响应消息。该多个DNS响应消息终端设备发送的多个DNS查询(DNS Query)请求消息的响应，该多个DNS响应消息该包括终端设备需查询的EAS的地址信息。
该EAS地址信息可以包括同一个边缘服务的多个EAS的地址信息，或者，该EAS地址信息还可以是不同边缘服务对应的多个EAS地址信息。
该处理单元用于根据第一指示信息确定为该多个DNS响应消息向第一核心网网元发送一次DNS信息报告。该第一指示信息可以包括该网络地址信息和数据网络的对应关系。
可选地，该装置100还可以包括存储单元130，用于缓存该多个DNS响应消息。
可选地，该收发单元还用于接收第一核心网网元发送的第二指示信息，该第二指示信息包括对所述多个DNS响应消息的DNS处理规则。
该DNS处理规则可以用于指示该服务发现功能网元向终端设备发送已缓存的所述多个DNS响应消息，或者用于指示该服务发现功能网元向终端设备设备发送指定EAS地址范围的DNS响应消息；或者，该DNS处理规则还可以用于指示该服务发现功能网元不缓存该多个DNS响应之后的第一DNS响应消息，该第一DNS响应消息同样是对该终端设备发送的多个DNS查询请求消息的响应；或者，该DNS处理规则还可以包括指示该服务发现功能网元丢弃该多个DNS响应之后的该第一DNS响应消息。
在一种可能的设计中，该装置100可以是上文方法实施例中的第一核心网网元，例如，SMF，也可以是用于实现上文方法实施例中第一核心网网元的功能的芯片。应理解，该装置100可以执行本申请实施例的方法400、方法500、方法600和方法700中的第一核心网网元所对应的步骤。应理解，各单元执行上述相应步骤的具体过程在上述方法实施例中已经详细说明，为了简洁，在此不再赘述。
图9是本申请实施例提供的装置200的示意性框图。如图所示，该装置200包括：至少一个处理器220。该处理器220与存储器耦合，用于执行存储器中存储的指令，以发送信号和/或接收信号。可选地，该装置200还包括存储器230，用于存储指令。可选的，该装置200还包括收发器210，处理器220控制收发器210发送信号和/或接收信号。
应理解，上述处理器220和存储器230可以合成一个处理装置，处理器220用于执行存储器230中存储的程序代码来实现上述功能。具体实现时，该存储器230也可以集成在处理器220中，或者独立于处理器220。
还应理解，收发器210可以包括收发器(或者称，接收机)和发射器(或者称，发射机)。收发器还可以进一步包括天线，天线的数量可以为一个或多个。收发器210有可以 是通信接口或者接口电路。
具体的，该装置200中的收发器210可以对应于装置100中的收发单元110，该装置200中的处理器220可对应于装置200中的处理单元120。
应理解，各收发器处理器执行上述相应步骤的具体过程在上述方法实施例中已经详细说明，为了简洁，在此不再赘述。
在实现过程中，上述方法的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。为避免重复，这里不再详细描述。
应注意，本申请实施例中的处理器可以是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(digital signal processor,DSP)、专用集成电路(application-specific integrated circuit,ASIC)、现场可编程门阵列(field-programmable gate array,FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。
可以理解，本申请实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synch-link DRAM，SLDRAM)和直接内存总线随机存取存储器(direct ram-bus RAM，DR RAM)。应注意，本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
根据本申请实施例提供的方法，本申请还提供一种计算机程序产品，该计算机程序产品上存储有计算机程序代码，当该计算机程序代码在计算机上运行时，使得该计算机执行方法300、方法400、方法500实施例中任意一个实施例的方法。
根据本申请实施例提供的方法，本申请还提供一种计算机可读介质，该计算机可读介 质存储有程序代码，当该程序代码在计算机上运行时，使得该计算机执行方法300、方法400、方法500实施例中任意一个实施例的方法。
根据本申请实施例提供的方法，本申请还提供一种系统，其包括前述的装置或设备。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，高密度数字视频光盘(digital video disc，DVD))、或者半导体介质(例如，固态硬盘(solid state disc，SSD))等。
上述各个装置实施例中网络侧设备与终端设备和方法实施例中的网络侧设备或终端设备对应，由相应的模块或单元执行相应的步骤，例如通信单元(收发器)执行方法实施例中接收或发送的步骤，除发送、接收外的其它步骤可以由处理单元(处理器)执行。具体单元的功能可以参考相应的方法实施例。其中，处理器可以为一个或多个。
在本说明书中使用的术语“部件”、“模块”、“系统”等用于表示计算机相关的实体、硬件、固件、硬件和软件的组合、软件、或执行中的软件。例如，部件可以是但不限于，在处理器上运行的进程、处理器、对象、可执行文件、执行线程、程序和/或计算机。通过图示，在计算设备上运行的应用和计算设备都可以是部件。一个或多个部件可驻留在进程和/或执行线程中，部件可位于一个计算机上和/或分布在2个或更多个计算机之间。此外，这些部件可从在上面存储有各种数据结构的各种计算机可读介质执行。部件可例如根据具有一个或多个数据分组(例如来自与本地系统、分布式系统和/或网络间的另一部件交互的二个部件的数据，例如通过信号与其它系统交互的互联网)的信号通过本地和/或远程进程来通信。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所述领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组 件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (39)

  1. 一种获取边缘服务的方法，其特征在于，包括：
    服务发现功能网元接收来自DNS服务器的多个DNS响应消息，所述多个DNS响应消息包括终端设备需查询的EAS的地址信息，其中，所述多个DNS响应消息的所述EAS的地址信息对应相同数据网络；
    所述服务发现功能网元根据第一指示信息确定为所述多个DNS响应消息向第一核心网网元发送一次DNS信息报告。
  2. 根据权利要求1所述的方法，其特征在于，所述服务发现功能网元根据第一指示信息确定为所述多个DNS响应消息向第一核心网网元发送一次DNS信息报告包括：
    所述服务发现功能网元向所述第一核心网网元上报一次所述多个DNS响应消息中一个DNS响应消息对应的DNS信息报告。
  3. 根据权利要求1或2所述的方法，其特征在于，所述第一指示信息包括网络地址与数据网络标识信息的对应关系信息，所述服务发现功能网元根据第一指示信息确定为所述多个DNS响应消息向第一核心网网元发送一次DNS信息报告包括：
    所述服务发现功能网元根据所述第一指示信息和所述多个DNS响应消息中的所述EAS的地址信息确定所述需查询的EAS对应相同的数据网络标识信息；
    所述服务发现功能网元向所述第一核心网网元上报一次所述多个DNS响应消息中一个DNS响应消息对应的DNS信息报告。
  4. 根据权利要求1至3中任一项所述的方法，其特征在于，所述方法还包括：
    所述服务发现功能网元缓存所述多个DNS响应消息；
    所述服务发现功能网元接收来自所述第一核心网网元的第二指示信息，所述第二指示信息包括对所述多个DNS响应消息的处理规则；
    所述服务发现功能网元根据所述第二指示信息向所述终端设备发送所述多个DNS响应消息。
  5. 根据权利要求1至4中任一项所述的方法，其特征在于，服务发现功能网元接收来自DNS服务器的多个DNS响应消息之前，所述方法还包括：
    所述服务发现功能网元接收来自所述第一核心网网元的所述第一指示信息。
  6. 根据权利要求1至5中任一项所述的方法，其特征在于，所述第一核心网网元为会话管理功能网元。
  7. 根据权利要求1至6中任一项所述的方法，其特征在于，所述数据网络的标识信息包括以下信息中的至少一个：
    所述数据网络的数据网络接入标识符DNAI，所述数据网络的数据网络名称DNN。
  8. 一种获取边缘服务的方法，其特征在于，包括：
    第一核心网网元向服务发现功能网元发送第一指示信息，所述第一指示信息用于指示所述服务发现功能网元为多个DNS响应消息向所述第一核心网网元发送一次DNS信息报告，所述多个DNS响应消息包括终端设备需查询的EAS的地址信息，其中，所述多个DNS响应消息的所述EAS的地址信息对应相同数据网络；
    所述第一核心网网元接收所述DNS信息报告。
  9. 根据权利要求8所述的方法，其特征在于，所述DNS信息报告为所述多个DNS响应消息中一个DNS响应消息对应的DNS信息报告。
  10. 根据权利要求8或9所述的方法，其特征在于，所述第一核心网网元为会话管理功能网元。
  11. 根据权利要求8至10中任一项所述的方法，其特征在于，所述第一指示信息包括网络地址与数据网络标识信息的对应关系信息。
  12. 根据权利要求8至11中任一项所述的方法，其特征在于，在所述第一核心网网元接收所述DNS信息报告之后，所述方法还包括：
    所述第一核心网网元向所述服务发现功能网元发送第二指示信息，所述第二指示信息包括对所述多个DNS响应消息的处理规则，所述处理规则用于指示所述服务发现功能网元向所述终端设备发送已缓存的所述多个DNS响应消息。
  13. 根据权利要求8至12中任一项所述的方法，其特征在于，所述数据网络的标识信息包括以下信息中的至少一个：
    所述数据网络的数据网络接入标识符DNAI，所述数据网络的数据网络名称DNN。
  14. 一种获取边缘服务的方法，其特征在于，包括：
    服务发现功能网元接收来自终端设备的多个DNS查询消息，所述多个DNS查询消息用于查询EAS的地址信息，所述多个DNS查询消息包括所述EAS的标识信息，其中，所述EAS的标识信息对应相同的数据网络；
    所述服务发现功能网元根据第三指示信息确定为所述多个DNS查询消息向第一核心网网元发送一次DNS信息报告。
  15. 根据权利要求14所述的方法，其特征在于，所述第三指示信息包括EAS的标识信息和数据网络标识信息的对应关系信息，所述服务发现功能网元根据第三指示信息确定为所述多个DNS查询消息向第一核心网网元发送一次DNS信息报告包括：
    所述服务发现功能网元根据所述第三指示信息确定所述多个DNS查询消息对应相同的数据网络标识信息；
    所述服务发现功能网元向所述第一核心网网元上报一次所述多个DNS查询消息中一个DNS查询消息对应的DNS信息报告。
  16. 根据权利要求15所述的方法，其特征在于，所述方法还包括：
    所述服务发现功能缓存所述多个DNS查询消息；
    所述服务发现功能接收来自所述第一核心网网元的第四指示信息，所述第四指示信息包括对所述多个DNS查询消息的处理规则；
    所述服务发现功能根据所述第四指示信息确定向DNS服务器发送所述多个DNS查询消息。
  17. 根据权利要求14至16中任一项所述的方法，其特征在于，服务发现功能网元接收来自终端设备的多个DNS查询消息之前，所述方法还包括：
    所述服务发现功能网元接收来自所述第一核心网网元的所述第三指示信息。
  18. 根据权利要求15至17中任一项所述的方法，其特征在于，所述EAS的标识信息包括以下信息中的至少一个：
    EAS的统一资源标识符URI，EAS的实例标识符，EAS的全限定域名FQDN。
  19. 根据权利要求15至18中任一项所述的方法，其特征在于，所述数据网络的标识信息包括以下信息中的至少一个：
    数据网络接入标识符DNAI，数据网络名称DNN。
  20. 一种获取边缘服务的方法，其特征在于，包括：
    第一核心网网元向服务发现功能网元发送的第三指示信息，所述第三指示信息用于指示所述服务发现功能网元为多个DNS查询消息向所述第一核心网网元发送一次DNS信息报告，所述多个DNS查询消息用于查询EAS的地址信息，所述多个DNS查询消息包括所述EAS的标识信息，其中，所述EAS的标识信息对应相同的数据网络；
    所述第一核心网网元接收所述DNS信息报告。
  21. 根据权利要求20所述的方法，其特征在于，所述第三指示信息包括EAS的标识信息和数据网络标识信息的对应关系信息。
  22. 根据权利要求20或21所述的方法，其特征在于，在所述第一核心网网元接收所述DNS信息报告之后，所述方法还包括：
    所述第一核心网网元向所述服务发现功能网元发送第四指示信息，所述第四指示信息包括对所述多个DNS查询消息的处理规则，所述处理规则包括为所述多个DNS查询消息构建客户端子网选项。
  23. 根据权利要求20至22中任一项所述的方法，其特征在于，所述EAS的标识信息包括以下信息中的至少一个：
    EAS的统一资源标识符URI，EAS的实例标识符，EAS的全限定域名FQDN。
  24. 根据权利要求20至23中任一项所述的方法，其特征在于，所述数据网络的标识信息包括以下信息中的至少一个：
    数据网络接入标识符DNAI，数据网络名称DNN。
  25. 一种获取边缘服务的装置，其特征在于，包括：
    处理器，所述处理器与存储器耦合，所述存储器用于存储程序或指令，当所述程序或指令被所述处理器执行时，使得所述装置执行如权利要求1至7中任一项所述的方法；或者，使得所述装置执行如权利要求8至13中任一项所述的方法；或者，使得所述装置执行如权利要求14至19中任一项所述的方法；或者，使得所述装置执行如权利要求20至24中任一项所述的方法。
  26. 一种服务发现功能网元，其特征在于，包括：
    处理器和存储器；
    所述存储器用于存储程序或指令，当所述程序或指令被所述处理器执行时，使得所述服务发现功能网元执行如权利要求1至7中任一项所述的方法；或者，使得所述服务发现功能网元执行如权利要求14至19中任一项所述的方法。
  27. 一种核心网网元，其特征在于，包括：
    处理器和存储器；
    所述存储器用于存储程序或指令，当所述程序或指令被所述处理器执行时，使得所述核心网网元执行如权利要求8至13中任一项所述的方法；或者，使得所述核心网网元执行如权利要求20至24中任一项所述的方法。
  28. 一种芯片系统，其特征在于，包括：
    存储器，用于存储计算机程序；
    处理器，用于从所述存储器调用并运行所述计算机程序，使得安装有所述芯片系统的设备执行如权利要求1至7中任一项、或者权利要求8至13中任一项、或者权利要求14至19中任一项、或者权利要求20至24中任一项所述的方法。
  29. 一种计算机可读存储介质，包括计算机程序，当其在计算机上运行时，使得所述计算机执行如权利要求1至7中任一项、或者权利要求8至13中任一项、或者权利要求14至19中任一项、或者权利要求20至24中任一项所述的方法。
  30. 一种通信系统，其特征在于，包括服务发现功能网元和第一核心网网元，所述服务发现功能网元用于执行如权利要求1至7中任一项所述的方法，所述第一核心网网元用于执行如权利要求8至13中任一项所述的方法。
  31. 根据权利要求30所述的系统，其特征在于，还包括：
    DNS服务器用于向所述服务发现功能网元发送多个DNS响应消息。
  32. 一种获取边缘服务的方法，其特征在于，包括：
    服务发现功能网元接收来自DNS服务器的多个DNS响应消息，所述多个DNS响应消息包括终端设备需查询的EAS的地址信息，其中，所述多个DNS响应消息的所述EAS的地址信息对应相同数据网络；
    所述服务发现功能网元根据第一指示信息确定为所述多个DNS响应消息向第一核心网网元发送一次DNS信息报告；
    所述第一核心网网元接收所述DNS信息报告。
  33. 根据权利要求32所述的方法，其特征在于，所述方法还包括：
    所述第一核心网网元向所述服务发现功能网元发送所述第一指示信息，所述第一指示信息用于指示所述服务发现功能网元为所述多个DNS响应消息向所述第一核心网网元发送一次DNS信息报告；
    所述服务发现功能网元接收来自所述第一核心网网元的所述第一指示信息。
  34. 根据权利要求32或33所述的方法，其特征在于，所述服务发现功能网元根据第一指示信息确定为所述多个DNS响应消息向第一核心网网元发送一次DNS信息报告包括：
    所述服务发现功能网元向所述第一核心网网元上报一次所述多个DNS响应消息中一个DNS响应消息对应的DNS信息报告。
  35. 根据权利要求32至34中任一所述的方法，其特征在于，所述方法还包括：
    所述服务发现功能网元缓存所述多个DNS响应消息；
    所述第一核心网网元向所述服务发现功能网元发送第二指示信息，所述第二指示信息包括对所述多个DNS响应消息的处理规则；
    所述服务发现功能网元接收来自所述第一核心网网元的所述第二指示信息；
    所述服务发现功能网元根据所述第二指示信息向所述终端设备发送所述多个DNS响应消息。
  36. 根据权利要求32至35中任一所述的方法，其特征在于，所述第一核心网网元为会话管理功能网元。
  37. 根据权利要求32至36中任一所述的方法，其特征在于，所述方法还包括：
    所述DNS服务器向所述服务发现功能网元发送所述多个DNS响应消息。
  38. 一种获取边缘服务的装置，其特征在于，包括一个或多个功能单元，用于执行如权利要求1至7中任一项所述的方法。
  39. 一种获取边缘服务的装置，其特征在于，包括一个或多个功能单元，用于执行如权利要求8至13中任一项所述的方法。
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