WO2023125377A1 - 服务器选择方法及设备 - Google Patents

服务器选择方法及设备 Download PDF

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Publication number
WO2023125377A1
WO2023125377A1 PCT/CN2022/141821 CN2022141821W WO2023125377A1 WO 2023125377 A1 WO2023125377 A1 WO 2023125377A1 CN 2022141821 W CN2022141821 W CN 2022141821W WO 2023125377 A1 WO2023125377 A1 WO 2023125377A1
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Prior art keywords
dns
delay
information
communication device
eas
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PCT/CN2022/141821
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English (en)
French (fr)
Inventor
吕华章
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维沃移动通信有限公司
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Publication of WO2023125377A1 publication Critical patent/WO2023125377A1/zh

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    • 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
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
    • H04L67/1004—Server selection for load balancing
    • H04L67/101—Server selection for load balancing based on network conditions
    • 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
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
    • H04L67/1004—Server selection for load balancing
    • H04L67/1012—Server selection for load balancing based on compliance of requirements or conditions with available server resources

Definitions

  • the present application belongs to the technical field of communications, and in particular relates to a server selection method and equipment.
  • core network devices such as Edge Application Server Discovery Function (EASDF)
  • EASDF Edge Application Server Discovery Function
  • DNS Domain Name System
  • DNS Domain Name System
  • the performance of the application server resolved by the DNS server may be poor, for example, the computing power is insufficient, and the N6 delay is large, thereby affecting the communication performance of the terminal.
  • Embodiments of the present application provide a server selection method and device, which can solve the problem that communication performance of a terminal is affected due to poor performance of an application server resolved by a DNS server.
  • a method for selecting a server including: a first communication device acquires a DNS processing rule, and the DNS processing rule is used to send a DNS query of a terminal to a DNS server, and the DNS server supports parsing the DNS query In the FQDN, obtain the IP address of the EAS that satisfies the first condition, and the first condition includes at least one of the following: the shortest N6 delay, the shortest N3 delay, the shortest N9 delay, the shortest user plane function UPF processing delay, and EAS computing resources are optimal; the first communication device sends the DNS processing rule to the second communication device.
  • a method for selecting a server including: a second communication device acquires DNS processing rules; the second communication device sends a DNS query of a terminal to a DNS server according to the DNS processing rules, and the DNS server Support parsing the FQDN in the DNS query to obtain the IP address of the EAS that meets the first condition, and the first condition includes at least one of the following: the shortest N6 delay, the shortest N3 delay, the shortest N9 delay, and the UPF processing time The shortest delay and the best EAS computing resources.
  • a server selection method including: a third communication device generates a DNS processing rule; the third communication device sends the DNS processing rule to the first communication device or the second communication device, and the DNS processing rule uses
  • the DNS server supports parsing the FQDN in the DNS query to obtain the IP address of the EAS that meets the first condition, and the first condition includes at least one of the following: N6 delay The shortest, the shortest N3 delay, the shortest N9 delay, the shortest UPF processing delay, and the best EAS computing resources.
  • a method for selecting a server including: the fourth communication device sends first information to the third communication device or the first communication device or the second communication device, and the first information is used to generate DNS processing rules;
  • the DNS processing rule is used to send the DNS query of the terminal to the DNS server, and the DNS server supports parsing the FQDN in the DNS query to obtain the IP address of the EAS that meets the first condition, and the first condition includes At least one of the following: the shortest N6 delay, the shortest N3 delay, the shortest N9 delay, the shortest UPF processing delay, and the best EAS computing resources.
  • a server selection method including: the fifth communication device sends third information to the third communication device, and the third information is used to generate a DNS processing rule; wherein, the DNS processing rule is used to The DNS query of the terminal is sent to the DNS server, and the DNS server supports parsing the FQDN in the DNS query to obtain the IP address of the EAS that meets the first condition, and the first condition includes at least one of the following: the shortest N6 delay, N3 has the shortest delay, N9 has the shortest delay, UPF has the shortest processing delay, and EAS has the best computing resources.
  • a first communication device including: an acquisition module, configured to acquire a DNS processing rule, the DNS processing rule is used to send a DNS query of a terminal to a DNS server, and the DNS server supports parsing the The FQDN in the DNS query obtains the IP address of the EAS that meets the first condition, and the first condition includes at least one of the following: the shortest N6 delay, the shortest N3 delay, the shortest N9 delay, and the user plane function UPF processing delay The shortest and the best EAS computing resources; a sending module, configured to send the DNS processing rules to the second communication device.
  • a second communication device including: an acquiring module, configured to acquire DNS processing rules; a sending module, configured to send a DNS query of a terminal to a DNS server according to the DNS processing rules, and the DNS The server supports parsing the FQDN in the DNS query to obtain the IP address of the EAS that satisfies the first condition.
  • the first condition includes at least one of the following: the shortest N6 delay, the shortest N3 delay, the shortest N9 delay, and UPF processing The shortest delay and the best EAS computing resources.
  • a third communication device including: a generation module, configured to generate DNS processing rules; a sending module, configured to send the DNS processing rules to the first communication device or the second communication device, and the DNS
  • the processing rule is used to send the DNS query of the terminal to a DNS server, the DNS server supports parsing the FQDN in the DNS query, and obtains the IP address of the EAS that meets the first condition, and the first condition includes at least one of the following: N6 has the shortest delay, N3 has the shortest delay, N9 has the shortest delay, UPF has the shortest processing delay, and EAS has the best computing resources.
  • a fourth communication device including: a sending module, configured to send first information to a third communication device or a first communication device or a second communication device, and the first information is used to generate a DNS processing rule; wherein, the DNS processing rule is used to send the DNS query of the terminal to a DNS server, and the DNS server supports parsing the FQDN in the DNS query to obtain the IP address of the EAS that meets the first condition, and the first The conditions include at least one of the following: the shortest N6 delay, the shortest N3 delay, the shortest N9 delay, the shortest UPF processing delay, and the optimal EAS computing resource.
  • a fifth communication device including: a sending module, configured to send third information to a third communication device, where the third information is used to generate a DNS processing rule; wherein, the DNS processing rule uses For sending the DNS query of the terminal to the DNS server, the DNS server supports parsing the FQDN in the DNS query to obtain the IP address of the EAS that meets the first condition, and the first condition includes at least one of the following: N6 delay The shortest, the shortest N3 delay, the shortest N9 delay, the shortest UPF processing delay, and the best EAS computing resources.
  • a network-side device in an eleventh aspect, includes a processor and a memory, the memory stores programs or instructions that can run on the processor, and the programs or instructions are executed by the processor When executed, the steps of the method described in any one of the first aspect to the fifth aspect are realized.
  • a network side device including a processor and a communication interface, wherein the processor and the communication interface are used to implement the method according to any one of the first aspect to the fifth aspect step.
  • a readable storage medium on which a program or instruction is stored, and when the program or instruction is executed by a processor, any one of the first to fifth aspects is implemented. steps of the method.
  • a chip in a fourteenth aspect, there is provided a chip, the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the first to fifth aspects A step in the method of any one of the aspects.
  • a computer program/program product is provided, the computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement the first aspect to the first aspect The steps of the method described in any one of the five aspects.
  • the DNS query of the terminal can be sent to the DNS server through the DNS processing rule.
  • the DNS server supports parsing the IP address of the EAS that meets the first condition.
  • the first condition Including at least one of the following: the shortest N6 delay, the shortest N3 delay, the shortest N9 delay, the shortest UPF processing delay, and the best EAS computing resources.
  • FIG. 1 is a schematic diagram of a wireless communication system according to an embodiment of the present application.
  • Fig. 2 is a schematic flowchart of a server selection method according to an embodiment of the present application
  • Fig. 3 is a schematic flowchart of a server selection method according to an embodiment of the present application.
  • FIG. 4 is a schematic flowchart of a server selection method according to an embodiment of the present application.
  • FIG. 5 is a schematic flowchart of a server selection method according to an embodiment of the present application.
  • FIG. 6 is a schematic flowchart of a method for selecting a server according to an embodiment of the present application.
  • FIG. 7 is a schematic flowchart of a server selection method according to an embodiment of the present application.
  • FIG. 8 is a schematic flowchart of a server selection method according to an embodiment of the present application.
  • FIG. 9 is a schematic flowchart of a server selection method according to an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a first communication device according to an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of a second communication device according to an embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of a third communication device according to an embodiment of the present application.
  • FIG. 13 is a schematic structural diagram of a fourth communication device according to an embodiment of the present application.
  • FIG. 14 is a schematic structural diagram of a fifth communication device according to an embodiment of the present application.
  • FIG. 15 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • Fig. 16 is a schematic structural diagram of a network side device according to an embodiment of the present application.
  • first, second and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific sequence or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or described herein and that "first" and “second” distinguish objects. It is usually one category, and the number of objects is not limited. For example, there may be one or more first objects.
  • “and/or” in the description and claims means at least one of the connected objects, and the character “/” generally means that the related objects are an "or” relationship.
  • LTE Long Term Evolution
  • LTE-Advanced LTE-Advanced
  • LTE-A Long Term Evolution-Advanced
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single-carrier Frequency Division Multiple Access
  • system and “network” in the embodiments of the present application are often used interchangeably, and the described technology can be used for the above-mentioned system and radio technology, and can also be used for other systems and radio technologies.
  • NR New Radio
  • the following description describes the New Radio (NR) system for illustrative purposes, and uses NR terminology in most of the following descriptions, but these techniques can also be applied to applications other than NR system applications, such as the 6th generation (6 th Generation, 6G) communication system.
  • 6G 6th Generation
  • Fig. 1 shows a block diagram of a wireless communication system to which the embodiment of the present application is applicable.
  • the wireless communication system includes a terminal 11 and a network side device 12 .
  • the terminal 11 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer) or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a palmtop computer, a netbook, a super mobile personal computer (ultra-mobile personal computer, UMPC), mobile Internet device (Mobile Internet Device, MID), augmented reality (augmented reality, AR) / virtual reality (virtual reality, VR) equipment, robot, wearable device (Wearable Device) , vehicle equipment (VUE), pedestrian terminal (PUE), smart home (home equipment with wireless communication functions, such as refrigerators, TVs, washing machines or furniture, etc.), game consoles, personal computers (personal computers, PCs), teller machines or self-service Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (
  • the network side device 12 may include an access network device or a core network device, wherein the access network device may also be called a radio access network device, a radio access network (Radio Access Network, RAN), a radio access network function, or a wireless access network unit.
  • the access network equipment may include a base station, a WLAN access point, or a WiFi node, etc.
  • the base station may be called a Node B, an evolved Node B (eNB), an access point, a Base Transceiver Station (BTS), a radio base station , radio transceiver, Basic Service Set (Basic Service Set, BSS), Extended Service Set (Extended Service Set, ESS), Home Node B, Home Evolved Node B, Transmitting Receiving Point (Transmitting Receiving Point, TRP) or the Any other suitable term in the field, as long as the same technical effect is achieved, the base station is not limited to a specific technical vocabulary. Specific types of base stations are defined.
  • Core network equipment may include but not limited to at least one of the following: core network nodes, core network functions, mobility management entities (Mobility Management Entity, MME), access mobility management functions (Access and Mobility Management Function, AMF), session management functions (Session Management Function, SMF), User Plane Function (UPF), Policy Control Function (Policy Control Function, PCF), Policy and Charging Rules Function (PCRF), edge application service Discovery function (Edge Application Server Discovery Function, EASDF), unified data management (Unified Data Management, UDM), unified data storage (Unified Data Repository, UDR), home subscriber server (Home Subscriber Server, HSS), centralized network configuration ( Centralized network configuration, CNC), network storage function (Network Repository Function, NRF), network exposure function (Network Exposure Function, NEF), local NEF (Local NEF, or L-NEF), binding support function (Binding Support Function, BSF), application function (Application Function, AF), etc. It should be noted that, in the embodiment of the present application, only the core
  • the first communication device may be a session management function (Session Management Function, SMF); the second communication device may be an edge application service discovery function (Edge Application Server Discovery Function, EASDF); the third communication device may be It is a network data analysis function (Network Data Analytics Function, NWDAF); the fourth communication device may be an application function (Application Function, AF); the fifth communication device may be a user plane function (User Plane Function, UPF).
  • SMF Session Management Function
  • EASDF Edge Application Server Discovery Function
  • NWDAF Network Data Analytics Function
  • AF Application Function
  • UPF User Plane Function
  • the embodiment of the present application provides a server selection method 200, which can be executed by the first communication device, in other words, the method can be executed by software or hardware installed on the first communication device, the method includes follows the steps below.
  • the first communication device obtains a domain name resolution system (Domain Name System, DNS) processing rule, the DNS processing rule is used to send the DNS query of the terminal to a DNS server, and the DNS server supports parsing the full text in the DNS query Qualified domain name (Fully Qualified Domain Name, FQDN), obtains the Internet Protocol (Internet Protocol, IP) address of the edge application server (Edge application server, EAS) that satisfies the first condition, and the first condition includes at least one of the following: N6 The shortest delay, the shortest N3 delay, the shortest N9 delay, the shortest UPF processing delay, and the best EAS computing resources.
  • DNS Domain Name System
  • the first communication device may be an SMF.
  • the first communication device may generate DNS handling rules; or, the first communication device requests the third communication device to provide DNS handling rules for the DNS query, and the first communication device may receive the first DNS handling rules in this step.
  • the DNS processing rule sent by the third communication device, where the third communication device may be NWDAF.
  • N6 is an interface, which is the interface between the UPF and the data network (Data Network, DN) data network.
  • the above-mentioned N6 delay can be public network delay, specifically, it can be the delay between the Protocol Data Unit (Protocol Data Unit, PDU) Session Anchor (PDU Session Anchor, PSA) and EAS or Application Server (Application Server, AS) .
  • the N6 delay may also represent the delay between the UPF and the DN data network.
  • N6 delay can also be predicted by artificial intelligence (AI) based on historical statistical values. For example, NWDAF collects the historical records of N6 delay from a UPF to DN. Then, NWDAF uses its own AI model and predicts it through AI.
  • AI artificial intelligence
  • the N6 delay can also be obtained by a third-party application server or UPF providing prior information, for example, subscribing to the service of UPF to obtain the N6 delay provided by UPF.
  • N3 is the delay between the user plane and the RAN.
  • N3 is the interface between UPF and RAN.
  • the time delay of the N3 interface can be reported by the UPF, or the historical record of the time delay of the N3 interface can be collected through the NWDAF, and the time delay of a certain N3 interface at the current moment can be obtained according to AI analysis.
  • the above N9 delay is the delay between UPF and UPF. Since data needs to be forwarded by multiple UPFs before being sent to EAS or DN through PSA, the N9 delay between UPFs is also one of the parameters that affect the access delay of EAS. Similarly, the N9 delay can also be reported by the UPF or provided by the NWDAF.
  • the end-to-end delay of accessing the EAS can be minimized, or the computing power of the EAS can be optimized to minimize the internal processing delay of the EAS. Therefore, in order to ensure that the DNS query of the terminal can be resolved by the DNS server to a server with the best EAS experience, then the generated DNS processing rules must be guaranteed to be sent to the DNS server, and at the same time the EAS IP address resolved by the DNS server address, the shortest end-to-end delay, or the best EAS computing power. Therefore, when the first communication device generates DNS processing rules, it needs to consider the time delay of each interface fed back by UPF, or consider the computing power status of EAS, or use NWDAF to assist in generating processing rules. The EAS computing power status generates DNS processing rules.
  • S204 The first communication device sends the DNS processing rule to the second communication device.
  • the second communication device may be an EASDF, and the EASDF is configured to process the DNS query of the terminal based on the DNS processing rule.
  • the DNS query of the terminal can be sent to the DNS server through the DNS processing rule, and the DNS server supports parsing the IP address of the EAS that meets the first condition,
  • the first condition includes at least one of the following: the shortest N6 delay, the shortest N3 delay, the shortest N9 delay, the shortest UPF processing delay, and the best EAS computing resource.
  • the embodiment of the present application is conducive to analyzing the EAS with better performance , which is conducive to improving the communication performance of the terminal and improving user experience.
  • the embodiment of this application fully considers the computing power of EAS, the delay of N6, N3, and N9 interfaces, and the delay of UPF processing, and formulates DNS processing that can select the best server according to the FQDN in the DNS query sent by the terminal.
  • the rule sends the DNS query of the terminal to the DNS server that can resolve and obtain the best EAS.
  • the UPF processing delay refers to the speed of processing data packets within the UPF due to changes in computing power resources. For example, if the UPF has insufficient computing power, the speed of forwarding or processing data packets will decrease.
  • the UPF processing delay is also one of the factors affecting the end-to-end delay from the terminal to the service server.
  • the DNS processing rules include at least one of the following 1) and 2):
  • the first DNS server includes a central DNS server.
  • the first DNS server may be the DNS server mentioned in S202.
  • a second IP address where the second IP address includes the IP address of a second DNS server, and the second DNS server supports parsing the IP address of the EAS that satisfies the first condition, or, the second DNS The server is located at the same location as the terminal, and the second DNS server includes a local DNS server.
  • the second DNS server may be the DNS server mentioned in S202.
  • the second DNS server being at the same location as the terminal includes: the second DNS server being under the same Data Network Access Identity (DNAI) as the terminal.
  • DNAI Data Network Access Identity
  • the DNS extension mechanism client subnet Extension Mechanisms for DNS Client Subnet, ECS
  • ECS Extension Mechanisms for DNS Client Subnet
  • This field generally uses a certain An IP address to indicate the current location of the terminal, then the DNS server can resolve the FQDN according to this field, and feedback a server IP address closest to the terminal topology.
  • the first IP address may be added to the DNS query as an ECS option of the DNS query.
  • the first IP address includes at least one of the following 1) to 3):
  • the above 1) to 3) show that the first IP address reflects the location of the EAS with the best computing power, so after this IP address is added to the ECS option field of the DNS query, the DNS server can use this IP address to Analyze the EAS IP address that satisfies both the optimal topology and the optimal computing power in the address area.
  • the acquiring the DNS processing rule by the first communication device includes: the first communication device requests a third communication device to provide a DNS processing rule for the DNS query; or, the first communication device
  • the DNS processing rule is generated according to the first information, and the first information includes at least one of the following: EAS computing power information, N6 delay information of each PSA, N3 delay information of PSA and RAN, N9 delay information, UPF processing delay information; wherein, the EAS computing power information includes: computing power resource information corresponding to the FQDN in the target area.
  • the target region can be within a DN or DNAI.
  • the DNS query is a DNS query sent by the terminal.
  • the first communication device requesting the third communication device to provide DNS processing rules for the DNS query includes: the first communication device sends the following 1) to 5 to the third communication device ) at least one of: 1) the IP address of the terminal; 2) the location information of the terminal; 3) the DNS query sent by the terminal or the FQDN in the DNS query; 4) EAS computing power information,
  • the EAS computing power information includes: computing power resource information corresponding to the FQDN in the target area. 5) Information about N6, N3, N9 interface delay and UPF processing delay
  • the EAS computing power information includes at least one of the following: 1) computing power resource information of one or more EASs corresponding to the first FQDN under the target area; 2) the target area Under the area, the first FQDN corresponds to the EAS with the largest computing resources; wherein, the first FQDN is a resolvable FQDN supported by the first DNS server or the second DNS server.
  • a certain FQDN www.abc.com has multiple corresponding servers.
  • the FQDN can resolve the computing resource information corresponding to the server IP address.
  • the FQDN can correspond to 5 server IP addresses. Although we don’t know the IP address (requires DNS server resolution), we can Know the computing power resources corresponding to these 5 servers, for example: the server cluster is 10 servers, or complete 1 million floating-point operations per second (flops) operations per second.
  • the computing power information of the server with the best computing power resources is that it can complete up to 1 million flops operations per second.
  • the 5G Core Network (5G Core Network, 5GC) network side can comprehensively evaluate the computing power resources corresponding to each FQDN in each area.
  • the shortest delay (for example, considering the shortest delay of N3 or N6)
  • the method before the first communication device generates the DNS processing rule, the method further includes: the first communication device sends second information to a third communication device; wherein, the first communication device The second information is used to obtain third information, and the third information includes at least one of the following: N6 delay information of each PSA, N3 delay information of PSA and RAN, N9 delay information, and UPF processing delay information; The first communication device receives the third information from the third communication device; wherein the third information is used by the first communication device to generate the DNS processing rule.
  • the first communication device SMF obtains the third information from the NWDAF through a subscription model (Nnwdaf_AnalyticsSubscription_Subscribe) or a request model (Nnwdaf_AnalyticsInfo_Request).
  • NWDAF outputs N3, N6 or N9 delays through the notification model (Nnwdaf_AnalyticsSubscription_Notify) or: response model (Nnwdaf_AnalyticsInfo_Response), so that SMF obtains the corresponding interface delays from NWDAF.
  • the third information may also be obtained by the SMF from the UPF.
  • the fifth communication device may be a UPF, and this device can provide the third information above.
  • UPF can provide service-based signaling, such as: event open subscription service (Nupf_EventExposure_Subscribe), which can subscribe to the delay conditions of interfaces such as N3, N6, and N9.
  • the first communication device may be an SMF that subscribes to the delay information of a certain UPF.
  • the SMF sends the parameter: , then after the UPF receives the subscription request, it passes the event exposure notification service (Nupf_EventExposure_Notify) to the SMF subscribed
  • the delay information is sent to the SMF.
  • Nupf_EventExposure_Notify includes: Event ID, Notification Correlation Information (Notification Correlation Information), UE ID(s) (User Permanent Identifier and possible Subscription Permanent Identifier(s) and if available Generic Public Subscription Identifier(s) , SUPI(s) and if available GPSI(s))), PDU Session ID(s), time stamp (time stamp), and N3 or N6 or N9 port delay
  • the method further includes: when the terminal moves or the third information is updated, the first communication device updates the DNS processing rule; wherein the third information includes At least one of the following: N6 delay information of each PSA, N3 delay information of the PSA and RAN, N9 delay information, and processing delay information of the UPF.
  • FIG. 3 is partly the same as or corresponds to the description in the method shown in FIG. 2 , and related descriptions are appropriately omitted to avoid repetition.
  • Fig. 3 is a schematic diagram of the implementation flow of the server selection method according to the embodiment of the present application, which can be applied to the second communication device. As shown in FIG. 3 , the method 300 includes the following steps.
  • the second communication device acquires a DNS processing rule.
  • the second communication device may be EASDF.
  • the second communication device may generate DNS handling rules (DNS handling rules); or, the second communication device requests the first communication device or the third communication device to provide DNS handling rules for the DNS query, and the second communication device in this step
  • DNS handling rules DNS handling rules
  • the communication device may receive the DNS processing rule sent by the first communication device or the third communication device, where the first communication device may be an SMF, and the third communication device may be an NWDAF.
  • the second communication device sends the terminal's DNS query to a DNS server according to the DNS processing rule, and the DNS server supports parsing the FQDN in the DNS query to obtain the IP address of the EAS that meets the first condition,
  • the first condition includes at least one of the following: the shortest N6 delay, the shortest N3 delay, the shortest N9 delay, the shortest UPF processing delay, and the optimal EAS computing resource.
  • FIG. 3 is the same as or corresponds to part of the execution process of the embodiment shown in FIG. 2 , therefore, some detailed descriptions in the embodiment shown in FIG. the embodiment.
  • the DNS query of the terminal can be sent to the DNS server through the DNS processing rule, and the DNS server supports parsing the IP address of the EAS that meets the first condition,
  • the first condition includes at least one of the following: the shortest N6 delay, the shortest N3 delay, the shortest N9 delay, the shortest UPF processing delay, and the best EAS computing resource.
  • the embodiment of the present application is conducive to analyzing the EAS with better performance , which is conducive to improving the communication performance of the terminal and improving user experience.
  • the acquiring the DNS processing rule by the second communication device includes: the second communication device requesting the first communication device or the third communication device to provide the DNS processing rule for the DNS query; or, the The second communication device generates the DNS processing rule according to the first information, and the first information includes at least one of the following: EAS computing power information, N6 delay information of each PSA, N3 delay information of PSA and RAN, N9 delay information, UPF processing delay information; wherein, the EAS computing power information includes: computing power resource information corresponding to the FQDN in the target area.
  • the second communication device requesting the first communication device to provide DNS processing rules for the DNS query includes: the second communication device sending at least one of the following to the first communication device: 1) IP address of the terminal; 2) location information of the terminal; 3) DNS query sent by the terminal or FQDN in the DNS query; 4) EAS computing power information, the EAS computing power information includes : Computing resource information corresponding to the FQDN in the target area.
  • the second communication device requesting the third communication device to provide DNS processing rules for the DNS query includes: the second communication device sending at least one of the following to the third communication device: 1) IP address of the terminal; 2) location information of the terminal; 3) DNS query sent by the terminal or FQDN in the DNS query; 4) EAS computing power information, the EAS computing power information includes : Computing resource information corresponding to the FQDN in the target area.
  • FIG. 4 is a schematic diagram of a flow for implementing a method for selecting a server according to an embodiment of the present application, which may be applied to a third communication device. As shown in FIG. 4 , the method 400 includes the following steps.
  • the third communication device generates a DNS processing rule.
  • the third communication device may be a NWDAF.
  • the third communication device sends the DNS processing rule to the first communication device or the second communication device, the DNS processing rule is used to send the DNS query of the terminal to a DNS server, and the DNS server supports parsing the DNS query In the FQDN, obtain the IP address of the EAS that satisfies the first condition, and the first condition includes at least one of the following: the shortest N6 delay, the shortest N3 delay, the shortest N9 delay, the shortest UPF processing delay, and the EAS computing power Optimal resources.
  • the first communication device may be an SMF
  • the second communication device may be an EASDF
  • the DNS query of the terminal can be sent to the DNS server through the DNS processing rule, and the DNS server supports parsing the IP address of the EAS that meets the first condition,
  • the first condition includes at least one of the following: the shortest N6 delay, the shortest N3 delay, the shortest N9 delay, the shortest UPF processing delay, and the best EAS computing resource.
  • the embodiment of the present application is conducive to analyzing the EAS with better performance , which is conducive to improving the communication performance of the terminal and improving user experience.
  • the DNS processing rules include at least one of the following 1) and 2):
  • a first IP address where the first IP address includes the IP address of the area where the EAS that satisfies the first condition is located, and the first IP address is used to be added to the DNS query to be sent to the first A DNS server, the first DNS server includes a central DNS server.
  • a second IP address where the second IP address includes the IP address of a second DNS server, and the second DNS server supports parsing the IP address of the EAS that satisfies the first condition, or, the second DNS The server is located at the same location as the terminal, and the second DNS server includes a local DNS server.
  • the first IP address includes at least one of the following: 1) the IP address or IP address segment of the DN where the EAS that meets the first condition is located; 2) the first condition is met 3) the IP address or address segment of the PSA corresponding to the first DNAI, where the first DNAI includes: the DNAI of the DN where the EAS that satisfies the first condition is located.
  • the location of the second DNS server at the same location as the terminal includes: the second DNS server is under the same DNAI as the terminal.
  • the generating the DNS processing rule by the third communication device includes: generating the DNS processing rule by the third communication device according to first information, where the first information includes at least one of the following: EAS Information, N6 delay information of each PSA, N3 delay information of PSA and RAN, N9 delay information, UPF processing delay; wherein, the EAS computing power information includes: the computing power resources corresponding to the FQDN in the target area information.
  • the method further includes: acquiring the first information by the third communication device.
  • the first or second communication device may acquire DNS processing rules from NWDAF through Nnwdaf_AnalyticsSubscription_Subscribe or: Nnwdaf_AnalyticsInfo_Request.
  • NWDAF outputs DNS processing rules through Nnwdaf_AnalyticsSubscription_Notify or: Nnwdaf_AnalyticsInfo_Response, so that SMF or EASDF obtains the corresponding interface delay from NWDAF.
  • FIG. 5 is a schematic diagram of an implementation flow of a method for selecting a server according to an embodiment of the present application, which may be applied to a fourth communication device. As shown in FIG. 5 , the method 500 includes the following steps.
  • the fourth communication device sends first information to the third communication device or the first communication device or the second communication device, where the first information is used to generate a DNS processing rule; wherein the DNS processing rule is used to convert the terminal's
  • the DNS query is sent to the DNS server, and the DNS server supports parsing the FQDN in the DNS query to obtain the IP address of the EAS that satisfies the first condition, and the first condition includes at least one of the following: N6 has the shortest delay, N3 The shortest delay, the shortest N9 delay, the shortest UPF processing delay, and the best EAS computing resources.
  • the fourth communication device may be an AF.
  • the DNS query of the terminal can be sent to the DNS server through the DNS processing rule, and the DNS server supports parsing the IP address of the EAS that meets the first condition,
  • the first condition includes at least one of the following: the shortest N6 delay, the shortest N3 delay, the shortest N9 delay, the shortest UPF processing delay, and the best EAS computing resource.
  • the embodiment of the present application is conducive to analyzing the EAS with better performance , which is conducive to improving the communication performance of the terminal and improving user experience.
  • the first information includes at least one of the following: EAS computing power information, N6 delay information of each PSA, N3 delay information of PSA and RAN, N9 delay information, UPF processing Delay information, the local DNS server IP (local DNS server IP) address under per DNAI, the EAS computing power information corresponding to the FQDN under per DNAI; wherein, the EAS computing power information includes: the FQDN corresponding to the target area Computing resource information.
  • the first information in an implementation manner, is also called EAS deployment information.
  • FIG. 6 is a schematic diagram of an implementation flow of a method for selecting a server according to an embodiment of the present application, which may be applied to a fifth communication device. As shown in FIG. 6, the method 600 includes the following steps.
  • the fifth communication device sends third information to the third communication device, where the third information is used to generate a DNS processing rule; where the DNS processing rule is used to send a DNS query of the terminal to a DNS server, and the DNS The server supports parsing the FQDN in the DNS query to obtain the IP address of the EAS that satisfies the first condition.
  • the first condition includes at least one of the following: the shortest N6 delay, the shortest N3 delay, the shortest N9 delay, and UPF processing The shortest delay and the best EAS computing resources.
  • the fifth communication device may be a UPF.
  • the DNS query of the terminal can be sent to the DNS server through the DNS processing rule, and the DNS server supports parsing the IP address of the EAS that meets the first condition,
  • the first condition includes at least one of the following: the shortest N6 delay, the shortest N3 delay, the shortest N9 delay, the shortest UPF processing delay, and the best EAS computing resource.
  • the embodiment of the present application is conducive to analyzing the EAS with better performance , which is conducive to improving the communication performance of the terminal and improving user experience.
  • the third information includes at least one of the following: N6 delay information of each PSA, N3 delay information of PSA and RAN, N9 delay information, and UPF processing delay information.
  • the third communication device subscribes to a service of the fifth communication device, and the service is used to obtain the Describe the third information.
  • the fifth communication device may be a UPF, and this device can provide the third information above.
  • UPF can provide service-oriented signaling, such as: Nupf_EventExposure_Subscribe, which can subscribe to the delay status of interfaces such as N3, N6, and N9.
  • the first communication device may be an SMF that subscribes to the delay information of a certain UPF. When subscribing, the SMF sends the parameter: , then after the UPF receives the subscription request, it sends the delay information subscribed by the SMF through: Nupf_EventExposure_Notify to SMF.
  • Nupf_EventExposure_Notify includes: Event ID, Notification Correlation Information, UE ID(s) (SUPI(s) and if available GPSI(s)), PDU Session ID(s), time stamp, and N3 or N6 or N9 port delay
  • this embodiment includes the following steps:
  • Step 1 The terminal establishes a PDU session.
  • Step 2 SMF selects EASDF for UE.
  • Step 3 Establish DNS context for UE, SMF establishes context in EASDF.
  • Step 4 AF subscribes to EAS computing power information. AF subscribes to the computing power information of each EAS.
  • Step 5 AF provides EAS computing power information to the 5G core network (5GC).
  • the EAS computing power information is included in the EAS deployment information.
  • AF provides EAS computing power information, which is sent to Unified Data Repository (UDR) through NEF.
  • UDR Unified Data Repository
  • AF provides EAS deployment information to NEF through Nnef_EASDeployment_Create/Update/Delete, and NEF sends this information to UDR through Nudr_DM_Create/Update/Delete.
  • AF provides EAS computing power information, which may be sent to NWDAF through NEF.
  • EAS EAS deployment information
  • NEF Nnef_EASDeployment_Create/Update/Delete
  • NWDAF can subscribe to AF’s EAS deployment information, for example, NWDAF subscribes to Nnef_EventExposure_Subscribe, and then NEF subscribes to AF’s: Naf_EventExposure_Subscribe
  • AF sends EAS deployment information to NEF through Naf_EventExposure_Notify
  • NEF sends EAS deployment information to NWDAF through Nnef_EventExposure_Notify.
  • the above EAS deployment information contains EAS computing power information, including at least one of the following 1) to 3):
  • Step 6 The DNS server can subscribe to EAS computing power information. In this way, when the DNS server resolves the FQDN, it can use the IP address of the EAS with the best computing power as the resolution result of the FQDN.
  • the DNS server can subscribe to the computing power information of the EAS in the form of AF.
  • Step 7 SMF restores EAS computing power information from UDR, or restores EAS computing power information from NEF.
  • the EAS computing power information is contained in EAS deployment information. This information is used by SMF to generate DNS processing rules for EASDF. The processing rules at this time are generated based on the new EAS computing power information, taking into account the factors of EAS computing power and N6 delay. For example, SMF obtains EAS deployment information through Nnef_EASDeployment_Subscribe.
  • Step 8 When the terminal moves, or the N6 delay changes, or the EAS computing power information changes, the SMF can update the DNS processing rules, where the N6 delay information can come from the NWDAF.
  • Step 9 The SMF can subscribe to the N6 interface delay, or the N3 delay, and the N9 delay of each PSA in the NWDAF.
  • SMF provides the PSA ID, IP address, etc. controlled by itself, and sends them to NWDAF, and NWDAF can collect the N6 delay after these PSAs.
  • the first communication device SMF obtains the third information from the NWDAF through Nnwdaf_AnalyticsSubscription_Subscribe or: Nnwdaf_AnalyticsInfo_Request.
  • NWDAF outputs N3/N6/N9 delays through Nnwdaf_AnalyticsSubscription_Notify or: Nnwdaf_AnalyticsInfo_Response, so that SMF obtains the corresponding interface delays from NWDAF.
  • Step 10 UE sends a DNS query, and the query includes FQDN, that is, the domain name to be resolved.
  • Step 11 After receiving the DNS query from the UE, EASDF will send the FQDN in the DNS query to the SMF by sending the following signaling Neasdf_DNSContext_Notify Request.
  • SMF has two options to provide DNS processing rules for EASDF.
  • Solution 1 As described in step 12, SMF requests NWDAF to provide DNS processing rules for this DNS query, for example, through the following signaling: Nnwdaf_AnalyticsSubscription_Subscribe, or Nnwdaf_AnalyticsInfo_Request.
  • Analytics ID DNS handling rules, in addition, UE IP address, FQDN, EAS computing power information (it may also be provided by AF to NWDAF before) and other content are also input to NWDAF. It is hoped that NWDAF can provide DNS processing rules for this UE and this FQDN.
  • Solution 2 SMF provides DNS processing rules for this DNS query based on EAS computing power information and N6 delay provided by NWDAF.
  • Step 13 SMF sends DNS processing rules to EASDF, for example, through the following signaling: Neasdf_DNSContext_Update Request.
  • the DNS processing rule includes an IP address, which is used to fill in the ECS option part of the DNS query.
  • this IP address should be the corresponding combination: the IP address with the best computing power + the shortest N6/N3/N9 delay.
  • Case B Put a local DNS server IP address in the DNS processing rule.
  • the local DNS server IP address corresponds to the DNS server that can resolve the best server.
  • Step 14 The DNS query is sent to the DNS server.
  • Step 15 If the DNS server subscribes to or obtains the previous best computing power situation in this area, such as described in step 5, then the DNS server can resolve the IP address of the best server for the FQDN of the UE.
  • Step 16 Feedback DNS response. If a new user plane needs to be inserted during this process, the inserted PSA is the PSA corresponding to the best server.
  • Step 17 The terminal establishes an IP connection with the EAS.
  • this embodiment mainly introduces that NWDAF provides N6 delay, or N3 delay, N9 delay, etc. Part of the description can refer to the embodiment shown in Figure 7, which includes the following steps:
  • Step 1 The SMF can subscribe to the N6 interface delay, or the N3 delay, and the N9 delay of each PSA in the NWDAF.
  • SMF obtains the third information from NWDAF through Nnwdaf_AnalyticsSubscription_Subscribe or: Nnwdaf_AnalyticsInfo_Request.
  • NWDAF outputs N3/N6/N9 delays through Nnwdaf_AnalyticsSubscription_Notify or: Nnwdaf_AnalyticsInfo_Response, so that SMF obtains the corresponding interface delays from NWDAF.
  • Step 2 NWDAF subscribes to UPF services, for example, through the following signaling: Nupf_EventExposure_Subscribe, parameters include: SUPI (UE ID), Event ID (ie: N6 delay), DNN, N6 interface ID, etc., to obtain each Delay of the N3/N9/N6 interface of the PSA.
  • SUPI UE ID
  • Event ID ie: N6 delay
  • DNN DNN
  • N6 interface ID etc.
  • Step 3 UPF notifies NWDAF of the delay of a certain N6 interface through Nupf_EventExposure_Notify.
  • Step 4 NWDAF informs SMF of the subscribed N6 delay through Nnwdaf_AnalyticsSubscription_Notify; or Nnwdaf_AnalyticsInfo_Response.
  • this embodiment mainly introduces that NWDAF provides DNS processing rules. Part of the description can refer to step 12 of the embodiment shown in FIG. 7 , and this embodiment includes the following steps.
  • Step 1 SMF requests NWDAF to provide DNS processing rules for DNS queries.
  • Nnwdaf_AnalyticsSubscription_Subscribe or: Nnwdaf_AnalyticsInfo_Request.
  • Analytics ID DNS handling rules, in addition, UE IP address, FQDN, EAS computing power information (it may also be provided by AF to NWDAF before) and other content are also input to NWDAF. It is hoped that NWDAF can provide DNS processing rules for this UE and this FQDN.
  • Step 2 If in step 1, SMF does not provide EAS computing power information, then it can be: AF provides EAS computing power information in advance, and then, NWDAF subscribes: Nnef_EASDeployment_Subscribe, subscribes to EAS computing power information.
  • Step 3 Inform NWDAF of EAS computing power information through the following signaling Nnef_EASDeployment_Notify.
  • Step 4 NWDAF informs the SMF of the generated DNS processing rules for the DNS query of a certain UE through Nnwdaf_AnalyticsSubscription_Notify; or Nnwdaf_AnalyticsInfo_Response.
  • FIG. 10 is a schematic structural diagram of a first communication device according to an embodiment of the present application. As shown in FIG. 10 , the first communication device 1000 includes the following modules.
  • the acquisition module 1002 is configured to acquire DNS processing rules, the DNS processing rules are used to send the DNS query of the terminal to a DNS server, and the DNS server supports parsing the FQDN in the DNS query, and obtains the EAS that satisfies the first condition IP address, the first condition includes at least one of the following: the shortest N6 delay, the shortest N3 delay, the shortest N9 delay, the shortest UPF processing delay, and the optimal EAS computing resources.
  • the DNS query of the terminal can be sent to the DNS server through the DNS processing rule, and the DNS server supports parsing the IP address of the EAS that meets the first condition.
  • the first condition includes At least one of the following: the shortest N6 delay, the shortest N3 delay, the shortest N9 delay, the shortest UPF processing delay, and the best EAS computing resources.
  • the DNS processing rules include at least one of the following 1) and 2):
  • a first IP address where the first IP address includes the IP address of the area where the EAS that satisfies the first condition is located, and the first IP address is used to be added to the DNS query to be sent to the first A DNS server, the first DNS server includes a central DNS server.
  • a second IP address where the second IP address includes the IP address of a second DNS server, and the second DNS server supports parsing the IP address of the EAS that satisfies the first condition, or, the second DNS The server is located at the same location as the terminal, and the second DNS server includes a local DNS server.
  • the first IP address includes at least one of the following 1) to 3):
  • the location of the second DNS server at the same location as the terminal includes: the second DNS server is under the same DNAI as the terminal.
  • the obtaining module 1002 is configured to: request the third communication device to provide DNS processing rules for the DNS query; or generate the DNS processing rules according to the first information, the first The information includes at least one of the following: EAS computing power information, N6 delay information of each PSA, N3 delay information of PSA and RAN, N9 delay information, UPF processing delay information; wherein, the EAS computing power information includes : Computing resource information corresponding to the FQDN in the target area.
  • the DNS query is a DNS query sent by the terminal.
  • the obtaining module 1002 is configured to send at least one of the following 1) to 4) to the third communication device: 1) the IP address of the terminal; 2) the The location information of the terminal; 3) the DNS query sent by the terminal or the FQDN in the DNS query; 4) the EAS computing power information, and the EAS computing power information includes: the computing power resource information corresponding to the FQDN in the target area.
  • the EAS computing power information includes at least one of the following: 1) computing power resource information of one or more EASs corresponding to the first FQDN under the target area; 2) the target area Under the area, the first FQDN corresponds to the EAS with the largest computing resources; wherein, the first FQDN is a resolvable FQDN supported by the first DNS server or the second DNS server.
  • the sending module 1004 is further configured to send second information to a third communication device; wherein the second information is used to obtain third information, and the third information includes at least the following One: the N6 delay information of each PSA, the N3 delay information of PSA and RAN, the N9 delay information, and the processing delay information of UPF; the first communication device receives all the information from the third communication device The third information; wherein, the third information is used by the first communication device to generate the DNS processing rule.
  • the first communication device further includes an update module, configured to update the DNS processing rule when the terminal moves or the third information is updated; wherein, the third information It includes at least one of the following: N6 delay information of each PSA, N3 delay information of PSA and RAN, N9 delay information, and UPF processing delay information.
  • the device 1000 according to the embodiment of the present application can refer to the process of the method 200 corresponding to the embodiment of the present application, and each unit/module in the device 1000 and the above-mentioned other operations and/or functions are respectively in order to realize the corresponding process in the method 200, And can achieve the same or equivalent technical effect, for the sake of brevity, no more details are given here.
  • FIG. 11 is a schematic structural diagram of a second communication device according to an embodiment of the present application. As shown in FIG. 11 , the second communication device 1100 includes the following modules.
  • Obtaining module 1102 configured to obtain DNS processing rules.
  • the sending module 1104 is configured to send the DNS query of the terminal to a DNS server according to the DNS processing rule, and the DNS server supports parsing the FQDN in the DNS query to obtain the IP address of the EAS satisfying the first condition, the The first condition includes at least one of the following: the shortest N6 delay, the shortest N3 delay, the shortest N9 delay, the shortest UPF processing delay, and the optimal EAS computing resource.
  • the DNS query of the terminal can be sent to the DNS server through the DNS processing rule, and the DNS server supports parsing the IP address of the EAS that meets the first condition.
  • the first condition includes At least one of the following: the shortest N6 delay, the shortest N3 delay, the shortest N9 delay, the shortest UPF processing delay, and the best EAS computing resources.
  • the obtaining module 1102 is configured to: request the first communication device or the third communication device to provide DNS processing rules for the DNS query; or generate the DNS processing rules according to the first information , the first information includes at least one of the following: EAS computing power information, N6 delay information of each PSA, N3 delay information of PSA and RAN, N9 delay information, UPF processing delay information; wherein, the EAS computing power information includes: computing power resource information corresponding to the FQDN in the target area.
  • the obtaining module 1102 is configured to send at least one of the following to the first communication device: 1) the IP address of the terminal; 2) the location information of the terminal; 3) The DNS query sent by the terminal or the FQDN in the DNS query; 4) EAS computing power information, where the EAS computing power information includes: computing power resource information corresponding to the FQDN in the target area.
  • the obtaining module 1102 is configured to send at least one of the following to the third communication device: 1) the IP address of the terminal; 2) the location information of the terminal; 3) The DNS query sent by the terminal or the FQDN in the DNS query; 4) EAS computing power information, where the EAS computing power information includes: computing power resource information corresponding to the FQDN in the target area.
  • the device 1100 according to the embodiment of the present application can refer to the process of the method 300 corresponding to the embodiment of the present application, and each unit/module in the device 1100 and the above-mentioned other operations and/or functions are respectively in order to realize the corresponding process in the method 300, And can achieve the same or equivalent technical effect, for the sake of brevity, no more details are given here.
  • FIG. 12 is a schematic structural diagram of a third communication device according to an embodiment of the present application. As shown in FIG. 12 , the third communication device 1200 includes the following modules.
  • a generating module 1202 configured to generate DNS processing rules.
  • a sending module 1204 configured to send the DNS processing rule to the first communication device or the second communication device, the DNS processing rule is used to send the DNS query of the terminal to a DNS server, and the DNS server supports parsing the DNS query In the FQDN, obtain the IP address of the EAS that satisfies the first condition, and the first condition includes at least one of the following: the shortest N6 delay, the shortest N3 delay, the shortest N9 delay, the shortest UPF processing delay, and the EAS computing power Optimal resources.
  • the DNS query of the terminal can be sent to the DNS server through the DNS processing rule, and the DNS server supports parsing the IP address of the EAS that meets the first condition.
  • the first condition includes At least one of the following: the shortest N6 delay, the shortest N3 delay, the shortest N9 delay, the shortest UPF processing delay, and the best EAS computing resources.
  • the DNS processing rules include at least one of the following 1) and 2):
  • a first IP address where the first IP address includes the IP address of the area where the EAS that satisfies the first condition is located, and the first IP address is used to be added to the DNS query to be sent to the first A DNS server, the first DNS server includes a central DNS server.
  • a second IP address where the second IP address includes the IP address of a second DNS server, and the second DNS server supports parsing the IP address of the EAS that satisfies the first condition, or, the second DNS The server is located at the same location as the terminal, and the second DNS server includes a local DNS server.
  • the first IP address includes at least one of the following: 1) the IP address or IP address segment of the data network DN where the EAS that meets the first condition is located; 2) the IP address that meets the first condition The data network access identifier DNAI of the DN where the EAS of a condition is located; 3) the IP address or address segment of the PSA corresponding to the first DNAI, and the first DNAI includes: the DN of the EAS that satisfies the first condition DNAI.
  • the location of the second DNS server at the same location as the terminal includes: the second DNS server is under the same DNAI as the terminal.
  • the generation module 1202 is configured to generate the DNS processing rule according to the first information, the first information including at least one of the following: EAS information, N6 delay information of each PSA , N3 delay information, N9 delay information, and UPF processing delay of PSA and RAN; wherein, the EAS computing power information includes: computing power resource information corresponding to the FQDN in the target area.
  • the third communication device further includes an obtaining module, configured to obtain the first information.
  • the device 1200 can refer to the process of the method 400 corresponding to the embodiment of the present application, and each unit/module in the device 1200 and the above-mentioned other operations and/or functions are respectively in order to realize the corresponding process in the method 400, And can achieve the same or equivalent technical effect, for the sake of brevity, no more details are given here.
  • FIG. 13 is a schematic structural diagram of a fourth communication device according to an embodiment of the present application. As shown in FIG. 13 , the fourth communication device 1300 includes the following modules.
  • a sending module 1302 configured to send first information to a third communication device or a first communication device or a second communication device, where the first information is used to generate a DNS processing rule; wherein the DNS processing rule is used to convert the terminal's
  • the DNS query is sent to the DNS server, and the DNS server supports parsing the FQDN in the DNS query to obtain the IP address of the EAS that satisfies the first condition, and the first condition includes at least one of the following: N6 has the shortest delay, N3 The shortest delay, the shortest N9 delay, the shortest UPF processing delay, and the best EAS computing resources.
  • the DNS query of the terminal can be sent to the DNS server through the DNS processing rule, and the DNS server supports parsing the IP address of the EAS that meets the first condition.
  • the first condition includes At least one of the following: the shortest N6 delay, the shortest N3 delay, the shortest N9 delay, the shortest UPF processing delay, and the best EAS computing resources.
  • the first information includes at least one of the following: EAS computing power information, N6 delay information of each PSA, N3 delay information of PSA and RAN, N9 delay information, UPF processing Delay information; wherein, the EAS computing power information includes: computing power resource information corresponding to the FQDN in the target area.
  • the device 1300 can refer to the process of the method 500 corresponding to the embodiment of the present application, and each unit/module in the device 1300 and the above-mentioned other operations and/or functions are respectively in order to realize the corresponding process in the method 500, And can achieve the same or equivalent technical effect, for the sake of brevity, no more details are given here.
  • FIG. 14 is a schematic structural diagram of a fifth communication device according to an embodiment of the present application. As shown in FIG. 14 , the fifth communication device 1400 includes the following modules.
  • a sending module 1402 configured to send third information to a third communication device, where the third information is used to generate a DNS processing rule; wherein, the DNS processing rule is used to send a DNS query of the terminal to a DNS server, and the DNS The server supports parsing the FQDN in the DNS query to obtain the IP address of the EAS that satisfies the first condition.
  • the first condition includes at least one of the following: the shortest N6 delay, the shortest N3 delay, the shortest N9 delay, and UPF processing The shortest delay and the best EAS computing resources.
  • the DNS query of the terminal can be sent to the DNS server through the DNS processing rule, and the DNS server supports parsing the IP address of the EAS that meets the first condition.
  • the first condition includes At least one of the following: the shortest N6 delay, the shortest N3 delay, the shortest N9 delay, the shortest UPF processing delay, and the best EAS computing resources.
  • the third information includes at least one of the following: N6 delay information of each PSA, N3 delay information of PSA and RAN, N9 delay information, and UPF processing delay information.
  • the third communication device subscribes to a service of the fifth communication device, and the service is used to obtain the third information.
  • the device 1400 according to the embodiment of the present application can refer to the process of the method 600 corresponding to the embodiment of the present application, and each unit/module in the device 1400 and the above-mentioned other operations and/or functions are respectively in order to realize the corresponding process in the method 600, And can achieve the same or equivalent technical effect, for the sake of brevity, no more details are given here.
  • this embodiment of the present application also provides a communication device 1500, including a processor 1501 and a memory 1502, and the memory 1502 stores programs or instructions that can run on the processor 1501, such as
  • the communication device 1500 is a network-side device
  • the program or instruction is executed by the processor 1501
  • the steps of the above server selection method embodiment can be implemented, and the same technical effect can be achieved. To avoid repetition, details are not repeated here.
  • the embodiment of the present application also provides a network side device, including a processor and a communication interface, where the processor and the communication interface are configured to execute the steps of the embodiments shown in FIG. 2 to FIG. 6 .
  • the network-side device embodiment corresponds to the above-mentioned network-side device method embodiment, and each implementation process and implementation mode of the above-mentioned method embodiment can be applied to this network-side device embodiment, and can achieve the same technical effect.
  • the embodiment of the present application also provides a network side device.
  • the network side device 1600 includes: a processor 1601 , a network interface 1602 and a memory 1603 .
  • the network interface 1602 is, for example, a common public radio interface (common public radio interface, CPRI).
  • the network-side device 1600 in this embodiment of the present invention further includes: instructions or programs stored in the memory 1603 and executable on the processor 1601, and the processor 1601 calls the instructions or programs in the memory 1603 to execute FIGS. 10 to 14
  • the methods executed by each module shown in the figure achieve the same technical effect, so in order to avoid repetition, they are not repeated here.
  • the embodiment of the present application also provides a readable storage medium.
  • the readable storage medium stores programs or instructions.
  • the program or instructions are executed by the processor, the various processes of the above server selection method embodiments can be realized, and the same To avoid repetition, the technical effects will not be repeated here.
  • the processor is the processor in the terminal described in the foregoing embodiments.
  • the readable storage medium includes a computer-readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk, and the like.
  • the embodiment of the present application further provides a chip, the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the above server selection method embodiment
  • the chip includes a processor and a communication interface
  • the communication interface is coupled to the processor
  • the processor is used to run programs or instructions to implement the above server selection method embodiment
  • the chip mentioned in the embodiment of the present application may also be called a system-on-chip, a system-on-chip, a system-on-a-chip, or a system-on-a-chip.
  • the embodiment of the present application further provides a computer program/program product, the computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement the above server selection method embodiment
  • the computer program/program product is executed by at least one processor to implement the above server selection method embodiment
  • the embodiment of the present application also provides a server selection system, including: a terminal and a network side device, and the network side device can be used to execute the steps of the above server selection method.
  • the term “comprising”, “comprising” or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or device. Without further limitations, an element defined by the phrase “comprising a " does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising that element.
  • the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved. Functions are performed, for example, the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.
  • the methods of the above embodiments can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is better implementation.
  • the technical solution of the present application can be embodied in the form of computer software products, which are stored in a storage medium (such as ROM/RAM, magnetic disk, etc.) , CD-ROM), including several instructions to make a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the methods described in the various embodiments of the present application.

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Abstract

本申请实施例公开了一种服务器选择方法及设备，属于通信技术领域，本申请实施例的服务器选择方法包括：第一通信设备获取DNS处理规则，所述DNS处理规则用于将终端的DNS查询发送至DNS服务器，所述DNS服务器支持解析所述DNS查询中的FQDN，获得满足第一条件的EAS的IP地址，所述第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优；所述第一通信设备发送所述DNS处理规则至第二通信设备。

Description

服务器选择方法及设备
相关申请的交叉引用
本申请主张在2021年12月27日在中国提交的中国专利申请No.202111616682.5的优先权，其全部内容通过引用包含于此。
技术领域
本申请属于通信技术领域，具体涉及一种服务器选择方法及设备。
背景技术
相关技术中，核心网设备，如边缘应用服务发现功能(Edge Application Server Discovery Function，EASDF)能够将终端的域名解析系统(Domain Name System，DNS)查询发送至DNS服务器，以便DNS服务器解析出与DNS查询对应的应用服务器。然而，DNS服务器解析出的应用服务器可能性能不佳，例如，算力不足、N6时延较大，从而影响终端的通信性能。
发明内容
本申请实施例提供一种服务器选择方法及设备，能够解决因DNS服务器解析出的应用服务器性能不佳，影响终端的通信性能的问题。
第一方面，提供了一种服务器选择方法，包括：第一通信设备获取DNS处理规则，所述DNS处理规则用于将终端的DNS查询发送至DNS服务器，所述DNS服务器支持解析所述DNS查询中的FQDN，获得满足第一条件的EAS的IP地址，所述第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、用户面功能UPF处理时延最短以及EAS算力资源最优；所述第一通信设备发送所述DNS处理规则至第二通信设备。
第二方面，提供了一种服务器选择方法，包括：第二通信设备获取DNS处理规则；所述第二通信设备根据所述DNS处理规则，将终端的DNS查询发送至DNS服务器，所述DNS服务器支持解析所述DNS查询中的FQDN，获得满足第一条件的EAS的IP地址，所述第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优。
第三方面，提供了一种服务器选择方法，包括：第三通信设备生成DNS处理规则；第三通信设备发送所述DNS处理规则至第一通信设备或第二通信设备，所述DNS处理规则用于将终端的DNS查询发送至DNS服务器，所述DNS服务器支持解析所述DNS查询中的FQDN，获得满足第一条件的EAS的IP地址，所述第一条件包括如下至少之一：N6 时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优。
第四方面，提供了一种服务器选择方法，包括：第四通信设备发送第一信息至第三通信设备或第一通信设备或第二通信设备，所述第一信息用于生成DNS处理规则；其中，所述DNS处理规则用于将终端的DNS查询发送至DNS服务器，所述DNS服务器支持解析所述DNS查询中的FQDN，获得满足第一条件的EAS的IP地址，所述第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优。
第五方面，提供了一种服务器选择方法，包括：第五通信设备发送第三信息至第三通信设备，所述第三信息用于生成DNS处理规则；其中，所述DNS处理规则用于将终端的DNS查询发送至DNS服务器，所述DNS服务器支持解析所述DNS查询中的FQDN，获得满足第一条件的EAS的IP地址，所述第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优。
第六方面，提供了一种第一通信设备，包括：获取模块，用于获取DNS处理规则，所述DNS处理规则用于将终端的DNS查询发送至DNS服务器，所述DNS服务器支持解析所述DNS查询中的FQDN，获得满足第一条件的EAS的IP地址，所述第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、用户面功能UPF处理时延最短以及EAS算力资源最优；发送模块，用于发送所述DNS处理规则至第二通信设备。
第七方面，提供了一种第二通信设备，包括：获取模块，用于获取DNS处理规则；发送模块，用于根据所述DNS处理规则，将终端的DNS查询发送至DNS服务器，所述DNS服务器支持解析所述DNS查询中的FQDN，获得满足第一条件的EAS的IP地址，所述第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优。
第八方面，提供了一种第三通信设备，包括：生成模块，用于生成DNS处理规则；发送模块，用于发送所述DNS处理规则至第一通信设备或第二通信设备，所述DNS处理规则用于将终端的DNS查询发送至DNS服务器，所述DNS服务器支持解析所述DNS查询中的FQDN，获得满足第一条件的EAS的IP地址，所述第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优。
第九方面，提供了一种第四通信设备，包括：发送模块，用于发送第一信息至第三通信设备或第一通信设备或第二通信设备，所述第一信息用于生成DNS处理规则；其中，所述DNS处理规则用于将终端的DNS查询发送至DNS服务器，所述DNS服务器支持解析所述DNS查询中的FQDN，获得满足第一条件的EAS的IP地址，所述第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优。
第十方面，提供了一种第五通信设备，包括：发送模块，用于发送第三信息至第三通信设备，所述第三信息用于生成DNS处理规则；其中，所述DNS处理规则用于将终端的 DNS查询发送至DNS服务器，所述DNS服务器支持解析所述DNS查询中的FQDN，获得满足第一条件的EAS的IP地址，所述第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优。
第十一方面，提供了一种网络侧设备，该网络侧设备包括处理器和存储器，所述存储器存储可在所述处理器上运行的程序或指令，所述程序或指令被所述处理器执行时实现如第一方面至第五方面任一项所述的方法的步骤。
第十二方面，提供了一种网络侧设备，包括处理器及通信接口，其中，所述处理器和所述通信接口用于实现如第一方面至第五方面任一项所述的方法的步骤。
第十三方面，提供了一种可读存储介质，所述可读存储介质上存储程序或指令，所述程序或指令被处理器执行时实现如第一方面至第五方面任一项所述的方法的步骤。
第十四方面，提供了一种芯片，所述芯片包括处理器和通信接口，所述通信接口和所述处理器耦合，所述处理器用于运行程序或指令，实现如第一方面至第五方面任一项所述的方法的步骤。
第十五方面，提供了一种计算机程序/程序产品，所述计算机程序/程序产品被存储在存储介质中，所述计算机程序/程序产品被至少一个处理器执行以实现如第一方面至第五方面任一项所述的方法的步骤。
在本申请实施例中，通过对DNS处理规则进行改进，通过该DNS处理规则可以将终端的DNS查询发送至DNS服务器，该DNS服务器支持解析出满足第一条件的EAS的IP地址，第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优，本申请实施例有利于解析出性能较优的EAS，有利于提升终端的通信性能，提升用户体验。
附图说明
图1是根据本申请实施例的无线通信系统的示意图；
图2是根据本申请实施例的服务器选择方法的示意性流程图；
图3是根据本申请实施例的服务器选择方法的示意性流程图；
图4是根据本申请实施例的服务器选择方法的示意性流程图；
图5是根据本申请实施例的服务器选择方法的示意性流程图；
图6是根据本申请实施例的服务器选择方法的示意性流程图；
图7是根据本申请实施例的服务器选择方法的示意性流程图；
图8是根据本申请实施例的服务器选择方法的示意性流程图；
图9是根据本申请实施例的服务器选择方法的示意性流程图；
图10是根据本申请实施例的第一通信设备的结构示意图；
图11是根据本申请实施例的第二通信设备的结构示意图；
图12是根据本申请实施例的第三通信设备的结构示意图；
图13是根据本申请实施例的第四通信设备的结构示意图；
图14是根据本申请实施例的第五通信设备的结构示意图；
图15是根据本申请实施例的通信设备的结构示意图；
图16是根据本申请实施例的网络侧设备的结构示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员所获得的所有其他实施例，都属于本申请保护的范围。
本申请的说明书和权利要求书中的术语“第一”、“第二”等是用于区别类似的对象，而不用于描述特定的顺序或先后次序。应该理解这样使用的术语在适当情况下可以互换，以便本申请的实施例能够以除了在这里图示或描述的那些以外的顺序实施，且“第一”、“第二”所区别的对象通常为一类，并不限定对象的个数，例如第一对象可以是一个，也可以是多个。此外，说明书以及权利要求中“和/或”表示所连接对象的至少其中之一，字符“/”一般表示前后关联对象是一种“或”的关系。
值得指出的是，本申请实施例所描述的技术不限于长期演进型(Long Term Evolution，LTE)/LTE的演进(LTE-Advanced，LTE-A)系统，还可用于其他无线通信系统，诸如码分多址(Code Division Multiple Access，CDMA)、时分多址(Time Division Multiple Access，TDMA)、频分多址(Frequency Division Multiple Access，FDMA)、正交频分多址(Orthogonal Frequency Division Multiple Access，OFDMA)、单载波频分多址(Single-carrier Frequency Division Multiple Access，SC-FDMA)和其他系统。本申请实施例中的术语“系统”和“网络”常被可互换地使用，所描述的技术既可用于以上提及的系统和无线电技术，也可用于其他系统和无线电技术。以下描述出于示例目的描述了新空口(New Radio，NR)系统，并且在以下大部分描述中使用NR术语，但是这些技术也可应用于NR系统应用以外的应用，如第6代(6 th Generation，6G)通信系统。
图1示出本申请实施例可应用的一种无线通信系统的框图。无线通信系统包括终端11和网络侧设备12。其中，终端11可以是手机、平板电脑(Tablet Personal Computer)、膝上型电脑(Laptop Computer)或称为笔记本电脑、个人数字助理(Personal Digital Assistant，PDA)、掌上电脑、上网本、超级移动个人计算机(ultra-mobile personal computer，UMPC)、移动上网装置(Mobile Internet Device，MID)、增强现实(augmented reality，AR)/虚拟现实(virtual reality，VR)设备、机器人、可穿戴式设备(Wearable Device)、车载设备(VUE)、行人终端(PUE)、智能家居(具有无线通信功能的家居设备，如冰箱、电视、洗衣机或者家具等)、游戏机、个人计算机(personal computer，PC)、柜员机或者自助机等终端侧设备，可穿戴式设备包括：智能手表、智能手环、智能耳机、智能眼镜、智能首饰(智能手镯、智能手链、智能戒指、智能项链、智能脚镯、智能脚链等)、智能腕带、 智能服装等。需要说明的是，在本申请实施例并不限定终端11的具体类型。网络侧设备12可以包括接入网设备或核心网设备，其中，接入网设备也可以称为无线接入网设备、无线接入网(Radio Access Network，RAN)、无线接入网功能或无线接入网单元。接入网设备可以包括基站、WLAN接入点或WiFi节点等，基站可被称为节点B、演进节点B(eNB)、接入点、基收发机站(Base Transceiver Station，BTS)、无线电基站、无线电收发机、基本服务集(Basic Service Set，BSS)、扩展服务集(Extended Service Set，ESS)、家用B节点、家用演进型B节点、发送接收点(Transmitting Receiving Point，TRP)或所述领域中其他某个合适的术语，只要达到相同的技术效果，所述基站不限于特定技术词汇，需要说明的是，在本申请实施例中仅以NR系统中的基站为例进行介绍，并不限定基站的具体类型。核心网设备可以包含但不限于如下至少一项：核心网节点、核心网功能、移动管理实体(Mobility Management Entity，MME)、接入移动管理功能(Access and Mobility Management Function，AMF)、会话管理功能(Session Management Function，SMF)、用户平面功能(User Plane Function，UPF)、策略控制功能(Policy Control Function，PCF)、策略与计费规则功能单元(Policy and Charging Rules Function，PCRF)、边缘应用服务发现功能(Edge Application Server Discovery Function，EASDF)、统一数据管理(Unified Data Management，UDM)，统一数据仓储(Unified Data Repository，UDR)、归属用户服务器(Home Subscriber Server，HSS)、集中式网络配置(Centralized network configuration，CNC)、网络存储功能(Network Repository Function，NRF)，网络开放功能(Network Exposure Function，NEF)、本地NEF(Local NEF，或L-NEF)、绑定支持功能(Binding Support Function，BSF)、应用功能(Application Function，AF)等。需要说明的是，在本申请实施例中仅以NR系统中的核心网设备为例进行介绍，并不限定核心网设备的具体类型。
下面结合附图，通过一些实施例及其应用场景对本申请实施例提供的服务器选择方法进行详细地说明。
本申请各个实施例中，第一通信设备可以为会话管理功能(Session Management Function，SMF)；第二通信设备可以为边缘应用服务发现功能(Edge Application Server Discovery Function，EASDF)；第三通信设备可以为网络数据分析功能(Network Data Analytics Function，NWDAF)；第四通信设备可以为应用功能(Application Function，AF)；第五通信设备可以为用户平面功能(User Plane Function，UPF)。
如图2所示，本申请实施例提供一种服务器选择方法200，该方法可以由第一通信设备执行，换言之，该方法可以由安装在第一通信设备的软件或硬件来执行，该方法包括如下步骤。
S202：第一通信设备获取域名解析系统(Domain Name System，DNS)处理规则，所述DNS处理规则用于将终端的DNS查询发送至DNS服务器，所述DNS服务器支持解析所述DNS查询中的全限定域名(Fully Qualified Domain Name，FQDN)，获得满足第一条件的边缘应用服务器(Edge application server，EAS)的网际协议(Internet Protocol，IP) 地址，所述第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优。
该实施例中，第一通信设备可以为SMF。
该步骤中，第一通信设备可以生成DNS处理规则(DNS handling rules)；或者，第一通信设备请求第三通信设备为所述DNS查询提供DNS处理规则，该步骤中第一通信设备可以接收第三通信设备发送的DNS处理规则，该第三通信设备可以为NWDAF。
N6是一个接口，是UPF和数据网络(Data Network，DN)数据网之间的接口。上述N6时延可以为公网时延，具体可以为协议数据单元(Protocol Data Unit，PDU)会话锚点(PDU Session Anchor，PSA)与EAS或应用服务器(Application Server，AS)之间的时延。N6时延也可以是代表UPF和DN数据网之间的时延。N6时延也可以通过人工智能(Artificial Intelligence，AI)根据历史统计值预测得到，比如NWDAF采集了某个UPF到DN的N6时延的历史记录，然后，NWDAF使用自身的AI模型并通过AI预测得到当前时刻某N6接口的时延情况；或者所述N6时延也可以让第三方应用服务器或UPF提供先验信息得到，比如，订阅UPF的服务，获得UPF提供的N6时延。
上述N3时延为用户面和RAN的时延。N3为UPF和RAN之间的接口。所述N3接口的时延，可以让UPF上报，也可以通过NWDAF采集N3接口时延的历史记录，并根据AI分析，得到当前时刻的某N3接口的时延。
上述N9时延为UPF和UPF之间的时延。由于数据需要先经过多个UPF的转发以后，才通过PSA发送至EAS或者DN，因此UPF之间的N9时延也是影响访问EAS时延的参数之一。同理的，所述N9时延也可以让UPF上报或者NWDAF提供。
综上所述，为了保证所选择的EAS体验最佳，因此，可以使访问EAS的端到端时延最短，或者，所述EAS的算力最优使得EAS内部处理时延最短。所以，为了保证终端的DNS查询，能够被DNS服务器解析出一个EAS体验最佳的服务器，那么，所述生成的DNS处理规则，必须保证能够发送至DNS服务器，同时这个DNS服务器解析出的EAS IP地址，端到端时延最短，或者，EAS算力最优。因此，第一通信设备生成DNS处理规则的时候，需要考虑UPF反馈的各接口时延，或者，考虑EAS的算力状态，或者，使用NWDAF辅助生成处理规则，所述NWDAF根据各个接口时延或EAS算力状态生成DNS处理规则。
S204：所述第一通信设备发送所述DNS处理规则至第二通信设备。
该实施例中，第二通信设备可以为EASDF，所述EASDF用于基于所述DNS处理规则处理终端的DNS查询。
本申请实施例提供的服务器选择方法，通过对DNS处理规则进行改进，通过该DNS处理规则可以将终端的DNS查询发送至DNS服务器，该DNS服务器支持解析出满足第一条件的EAS的IP地址，第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优，本申请实施例有利于解析出性能 较优的EAS，有利于提升终端的通信性能，提升用户体验。
本申请实施例充分考虑了EAS的算力情况、N6、N3、N9接口时延以及UPF处理时延的情况，根据终端发送的DNS查询中的FQDN，制定出能够选择出最佳服务器的DNS处理规则，把终端的DNS查询发送至能够解析并获得最佳EAS的DNS服务器。所述UPF处理时延，指的是UPF内部由于算力资源的变化，所导致的处理数据包速度的快慢，比如，UPF如果算力不足，则转发或处理数据包的速度会下降。UPF处理时延也是影响终端到业务服务器端到端时延的因素之一。
可选地，作为一个实施例，所述DNS处理规则包括如下1)和2)中的至少之一：
1)第一IP地址，所述第一IP地址包括满足所述第一条件的EAS所在的区域的IP地址，所述第一IP地址用于被添加到所述DNS查询中以发送至第一DNS服务器，所述第一DNS服务器包括中央DNS服务器。该第一DNS服务器可以是S202中提到的DNS服务器。
2)第二IP地址，所述第二IP地址包括第二DNS服务器的IP地址，所述第二DNS服务器支持解析出满足所述第一条件的EAS的IP地址，或，所述第二DNS服务器与所述终端位于相同的位置，所述第二DNS服务器包括本地DNS服务器。该第二DNS服务器可以是S202中提到的DNS服务器。可选地，所述第二DNS服务器与所述终端位于相同的位置包括：所述第二DNS服务器与所述终端在相同的数据网络接入标识(Data Network Access Identity，DNAI)下。
一种实施方式中，可以在DNS查询中，增加DNS扩展机制的客户端子网(Extension Mechanisms for DNS Client Subnet，ECS)选项(option)(又叫edns-client-subnet)，这个字段一般就是使用某个IP地址，来表明当前终端所在的位置，那么DNS服务器可以根据这个字段，解析FQDN，并反馈一个距离终端拓扑最近的服务器IP地址。一种实施方式中，所述第一IP地址可以作为DNS查询的ECS option，添加至DNS查询。可选地，作为一个实施例，所述第一IP地址包括如下1)至3)中的至少之一：
1)满足所述第一条件的EAS所在的数据网络(Data Network，DN)的IP地址或IP地址段。
2)满足所述第一条件的EAS所在的DN的数据网络接入标识(Data Network Access Identity，DNAI)。
3)第一DNAI对应的PSA的IP地址或地址段，所述第一DNAI包括：满足所述第一条件的EAS所在的DN的DNAI。
上述1)至3)表明，所述第一IP地址由于反映的是算力最优EAS所在的位置，因此，该IP地址添加到DNS查询的ECS option字段后，DNS服务器根据这个IP地址，能够解析出该地址区域下同时满足拓扑最优或算力最优的EAS IP地址。
可选地，作为一个实施例，所述第一通信设备获取DNS处理规则包括：所述第一通信设备请求第三通信设备为所述DNS查询提供DNS处理规则；或者，所述第一通信设备 根据第一信息生成所述DNS处理规则，所述第一信息包括如下至少之一：EAS算力信息，每个PSA的N6时延信息、PSA和RAN的N3时延信息、N9时延信息、UPF处理时延信息；其中，所述EAS算力信息包括：目标区域下FQDN所对应的算力资源信息。该目标区域可以是某DN或DNAI内。
可选地，作为一个实施例，所述DNS查询为终端发送的DNS查询。
可选地，作为一个实施例，所述第一通信设备请求第三通信设备为所述DNS查询提供DNS处理规则包括：所述第一通信设备向所述第三通信设备发送如下1)至5)中的至少之一：1)所述终端的IP地址；2)所述终端的位置信息；3)所述终端发送的DNS查询或所述DNS查询中的FQDN；4)EAS算力信息，所述EAS算力信息包括：目标区域下FQDN所对应的算力资源信息。5)N6、N3、N9接口时延以及UPF处理时延的信息
可选地，作为一个实施例，所述EAS算力信息包括如下至少之一：1)所述目标区域下，第一FQDN对应的一个或多个EAS的算力资源信息；2)所述目标区域下，第一FQDN对应的具有最大算力资源的EAS；其中，所述第一FQDN为所述第一DNS服务器或所述第二DNS服务器所支持的，能够解析的FQDN。举例说明，比如，在某个区域下(比如，DN 1范围内)，某FQDN： www.abc.com，对应的服务器有多个。然后，我们需要得到的EAS算力信息，包括如下两种情况：
情况1：该FQDN所能够解析出的服务器IP地址所对应的算力资源信息，比如，该FQDN能够对应5个服务器IP地址，我们虽然不知道IP地址的情况(需要DNS服务器解析)，但是能够知道这5个服务器所对应的算力资源，比如：服务器集群为10台服务器，或者，每秒钟完成100万次每秒浮点运算次数(floating-point operations per second，flops)运算。
情况2：该FQDN能够解析出的服务器IP地址所对应的最大算力资源，只给出算力资源最优的服务器的算力信息即可，比如：该区域下，FQDN＝ www.abc.com所对应的，最佳算力资源的服务器的算力信息为，每秒钟最多完成100万次flops运算。
有了上述信息以后，5G核心网(5G Core Network，5GC)网络侧，可以综合的评价，每个区域内的每个FQDN所对应的算力资源情况。再结合UPF上报的或NWDAF收集的各个接口时延信息，比如，N3，N6接口时延，那么网络侧就能够选择端到端时延最优或算力最优的服务器。比如，在DN＝1下，FQDN＝ www.abc.com，存在一个算力资源为：每秒钟完成100万次flops运算的服务器；而DN＝2下，FQDN＝ www.abc.com，存在一个算力资源为：每秒钟完成50万次flops运算的服务器。这样，对于网络侧来说，虽然DN＝1，距离UE可能是最近的，但是由于该区域下的服务器算力较差，因此可能端到端时延未必最优。所以，这时候，网络侧生成的DNS处理规则，一定是希望能够把终端的DNS查询，转发至DN＝1下的DNS服务器进行解析，所得到的EAS IP地址，一定能够满足算力最优或者时延最短(比如，综合考虑N3或N6时延最短)
可选地，作为一个实施例，所述第一通信设备生成所述DNS处理规则之前，所述方 法还包括：所述第一通信设备发送第二信息至第三通信设备；其中，所述第二信息用于获取第三信息，所述第三信息包括如下至少之一：每个PSA的N6时延信息、PSA和RAN的N3时延信息、N9时延信息、UPF的处理时延信息；所述第一通信设备接收来自于所述第三通信设备的所述第三信息；其中，所述第三信息用于第一通信设备生成所述DNS处理规则。比如，第一通信设备SMF，通过订阅模型(Nnwdaf_AnalyticsSubscription_Subscribe)或者：请求模型(Nnwdaf_AnalyticsInfo_Request)，来从NWDAF获取第三信息。其中Nnwdaf_AnalyticsSubscription_Subscribe或者：Nnwdaf_AnalyticsInfo_Request中，包含的第二信息包括：UPF身份标识(UPF Identification，UPF ID)，UPF IP地址，UE ID，UE IP地址，Analytics ID＝N3/N6/N9 delay。然后，NWDAF通过通知模型(Nnwdaf_AnalyticsSubscription_Notify)或者：响应模型(Nnwdaf_AnalyticsInfo_Response)，输出N3、N6或N9时延，这样SMF就从NWDAF获得了对应的各个接口时延。
另外，所述第三信息，也可以是SMF从UPF获得。比如，所述第五通信设备可以是UPF，该设备能够提供上述第三信息。UPF可以提供服务化信令，比如：事件开放订阅服务(Nupf_EventExposure_Subscribe)，该信令可以订阅N3，N6，N9等接口的时延情况。比如，第一通信设备可以是SMF，订阅了某个UPF的时延信息，订阅时候SMF发送参数：，那么UPF收到该订阅请求以后，通过：事件开放通知服务(Nupf_EventExposure_Notify)，将SMF所订阅的时延信息，发送给SMF。Nupf_EventExposure_Notify中包括：Event ID，通知关联信息(Notification Correlation Information),UE ID(s)(用户永久标识和可能存在的通用公共用户标识(Subscription Permanent Identifier(s)and if available Generic Public Subscription Identifier(s)，SUPI(s)and if available GPSI(s))),PDU Session ID(s),时间戳(time stamp)，以及N3或N6或N9口时延
可选地，作为一个实施例，所述方法还包括：在所述终端移动或第三信息更新的情况下，所述第一通信设备更新所述DNS处理规则；其中，所述第三信息包括如下至少之一：每个PSA的N6时延信息、PSA和RAN的N3时延信息、N9时延信息、UPF的处理时延信息。
以上结合图2详细描述了根据本申请实施例的服务器选择方法。下面将结合图3详细描述根据本申请另一实施例的服务器选择方法。可以理解的是，图3与图2所示的方法中的描述部分相同或相对应，为避免重复，适当省略相关描述。
图3是本申请实施例的服务器选择方法实现流程示意图，可以应用在第二通信设备。如图3所示，该方法300包括如下步骤。
S302：第二通信设备获取DNS处理规则。
该实施例中，第二通信设备可以为EASDF。
该步骤中，第二通信设备可以生成DNS处理规则(DNS handling rules)；或者，第二通信设备请求第一通信设备或第三通信设备为所述DNS查询提供DNS处理规则，该步骤 中第二通信设备可以接收第一通信设备或第三通信设备发送的DNS处理规则，该第一通信设备可以为SMF，该第三通信设备可以为NWDAF。
S304：所述第二通信设备根据所述DNS处理规则，将终端的DNS查询发送至DNS服务器，所述DNS服务器支持解析所述DNS查询中的FQDN，获得满足第一条件的EAS的IP地址，所述第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优。
需要说明的是，图3所示的实施例中与图2所示的实施例的部分执行过程相同或相对应，因此，图3所示的实施例中的一些细节描述可以参照图2所示的实施例。
本申请实施例提供的服务器选择方法，通过对DNS处理规则进行改进，通过该DNS处理规则可以将终端的DNS查询发送至DNS服务器，该DNS服务器支持解析出满足第一条件的EAS的IP地址，第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优，本申请实施例有利于解析出性能较优的EAS，有利于提升终端的通信性能，提升用户体验。
可选地，作为一个实施例，所述第二通信设备获取DNS处理规则包括：所述第二通信设备请求第一通信设备或第三通信设备为所述DNS查询提供DNS处理规则；或者，所述第二通信设备根据第一信息生成所述DNS处理规则，所述第一信息包括如下至少之一：EAS算力信息，每个PSA的N6时延信息、PSA和RAN的N3时延信息、N9时延信息、UPF处理时延信息；其中，所述EAS算力信息包括：目标区域下FQDN所对应的算力资源信息。
可选地，作为一个实施例，所述第二通信设备请求第一通信设备为所述DNS查询提供DNS处理规则包括：所述第二通信设备向所述第一通信设备发送如下至少之一：1)所述终端的IP地址；2)所述终端的位置信息；3)所述终端发送的DNS查询或所述DNS查询中的FQDN；4)EAS算力信息，所述EAS算力信息包括：目标区域下FQDN所对应的算力资源信息。
可选地，作为一个实施例，所述第二通信设备请求第三通信设备为所述DNS查询提供DNS处理规则包括：所述第二通信设备向所述第三通信设备发送如下至少之一：1)所述终端的IP地址；2)所述终端的位置信息；3)所述终端发送的DNS查询或所述DNS查询中的FQDN；4)EAS算力信息，所述EAS算力信息包括：目标区域下FQDN所对应的算力资源信息。
图4是本申请实施例的服务器选择方法实现流程示意图，可以应用在第三通信设备。如图4所示，该方法400包括如下步骤。
S402：第三通信设备生成DNS处理规则。
该实施例中，第三通信设备可以为NWDAF。
S404：第三通信设备发送所述DNS处理规则至第一通信设备或第二通信设备，所述DNS处理规则用于将终端的DNS查询发送至DNS服务器，所述DNS服务器支持解析所 述DNS查询中的FQDN，获得满足第一条件的EAS的IP地址，所述第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优。
需要说明的是，图4所示的实施例中与图2所示的实施例的部分执行过程相同或相对应，因此，图4所示的实施例中的一些细节描述可以参照图2所示的实施例。
该实施例中，第一通信设备可以为SMF，该第二通信设备可以为EASDF。
本申请实施例提供的服务器选择方法，通过对DNS处理规则进行改进，通过该DNS处理规则可以将终端的DNS查询发送至DNS服务器，该DNS服务器支持解析出满足第一条件的EAS的IP地址，第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优，本申请实施例有利于解析出性能较优的EAS，有利于提升终端的通信性能，提升用户体验。
可选地，作为一个实施例，所述DNS处理规则包括如下1)和2)中的至少之一：
1)第一IP地址，所述第一IP地址包括满足所述第一条件的EAS所在的区域的IP地址，所述第一IP地址用于被添加到所述DNS查询中以发送至第一DNS服务器，所述第一DNS服务器包括中央DNS服务器。
2)第二IP地址，所述第二IP地址包括第二DNS服务器的IP地址，所述第二DNS服务器支持解析出满足所述第一条件的EAS的IP地址，或，所述第二DNS服务器与所述终端位于相同的位置，所述第二DNS服务器包括本地DNS服务器。
可选地，作为一个实施例，所述第一IP地址包括如下至少之一：1)满足所述第一条件的EAS所在的DN的IP地址或IP地址段；2)满足所述第一条件的EAS所在的DN的DNAI；3)第一DNAI所对应的PSA的IP地址或地址段，所述第一DNAI包括：满足所述第一条件的EAS所在的DN的DNAI。
可选地，作为一个实施例，所述第二DNS服务器与所述终端位于相同的位置包括：所述第二DNS服务器与所述终端在相同的DNAI下。
可选地，作为一个实施例，所述第三通信设备生成DNS处理规则包括：所述第三通信设备根据第一信息生成所述DNS处理规则，所述第一信息包括如下至少之一：EAS信息，每个PSA的N6时延信息、PSA和RAN的N3时延信息、N9时延信息、UPF处理时延；其中，所述EAS算力信息包括：目标区域下FQDN所对应的算力资源信息。
可选地，作为一个实施例，所述方法还包括：所述第三通信设备获取所述第一信息。
比如，所述第一或第二通信设备，可以通过Nnwdaf_AnalyticsSubscription_Subscribe或者：Nnwdaf_AnalyticsInfo_Request，从NWDAF获取DNS处理规则。上述信令的输入包括：Analytics ID＝DNS handling rules，UE IP地址、终端DNS查询中的FQDN、EAS部署信息(EAS deployment information)等内容也输入给NWDAF。希望NWDAF能够提供针对该UE，该FQDN的DNS handling rules。NWDAF通过Nnwdaf_AnalyticsSubscription_Notify或者：Nnwdaf_AnalyticsInfo_Response，输出DNS处 理规则，这样SMF或EASDF，就从NWDAF获得了对应的各个接口时延。
图5是本申请实施例的服务器选择方法实现流程示意图，可以应用在第四通信设备。如图5所示，该方法500包括如下步骤。
S502：第四通信设备发送第一信息至第三通信设备或第一通信设备或第二通信设备，所述第一信息用于生成DNS处理规则；其中，所述DNS处理规则用于将终端的DNS查询发送至DNS服务器，所述DNS服务器支持解析所述DNS查询中的FQDN，获得满足第一条件的EAS的IP地址，所述第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优。
该实施例中，第四通信设备可以为AF。
本申请实施例提供的服务器选择方法，通过对DNS处理规则进行改进，通过该DNS处理规则可以将终端的DNS查询发送至DNS服务器，该DNS服务器支持解析出满足第一条件的EAS的IP地址，第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优，本申请实施例有利于解析出性能较优的EAS，有利于提升终端的通信性能，提升用户体验。
可选地，作为一个实施例，所述第一信息包括如下至少之一：EAS算力信息，每个PSA的N6时延信息、PSA和RAN的N3时延信息、N9时延信息、UPF处理时延信息、per DNAI下的本地DNS服务器IP(local DNS server IP)地址、per DNAI下的FQDN所对应的EAS算力信息；其中，所述EAS算力信息包括：目标区域下FQDN所对应的算力资源信息。所述第一信息，一种实施方式中，又叫EAS deployment information。
图6是本申请实施例的服务器选择方法实现流程示意图，可以应用在第五通信设备。如图6所示，该方法600包括如下步骤。
S602：第五通信设备发送第三信息至第三通信设备，所述第三信息用于生成DNS处理规则；其中，所述DNS处理规则用于将终端的DNS查询发送至DNS服务器，所述DNS服务器支持解析所述DNS查询中的FQDN，获得满足第一条件的EAS的IP地址，所述第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优。
该实施例中，第五通信设备可以为UPF。
本申请实施例提供的服务器选择方法，通过对DNS处理规则进行改进，通过该DNS处理规则可以将终端的DNS查询发送至DNS服务器，该DNS服务器支持解析出满足第一条件的EAS的IP地址，第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优，本申请实施例有利于解析出性能较优的EAS，有利于提升终端的通信性能，提升用户体验。
可选地，作为一个实施例，所述第三信息包括如下至少之一：每个PSA的N6时延信息、PSA和RAN的N3时延信息、N9时延信息、UPF的处理时延信息。
可选地，作为一个实施例，所述第五通信设备发送第三信息至第三通信设备之前，所 述第三通信设备订阅有所述第五通信设备的服务，所述服务用于获得所述第三信息。
比如，所述第五通信设备可以是UPF，该设备能够提供上述第三信息。UPF可以提供服务化信令，比如：Nupf_EventExposure_Subscribe，该信令可以订阅N3，N6，N9等接口的时延情况。比如，第一通信设备可以是SMF，订阅了某个UPF的时延信息，订阅时候SMF发送参数：，那么UPF收到该订阅请求以后，通过：Nupf_EventExposure_Notify，将SMF所订阅的时延信息，发送给SMF。Nupf_EventExposure_Notify中包括：Event ID，Notification Correlation Information,UE ID(s)(SUPI(s)and if available GPSI(s)),PDU Session ID(s),time stamp，以及N3或N6或N9口时延
为详细说明本申请实施例提供的服务器选择方法，以下将结合几个具体的实施例进行说明。如图7所示，该实施例包括如下步骤：
步骤1：终端建立PDU会话。
步骤2：SMF为UE选择EASDF。
步骤3：为UE建立DNS上下文，SMF在EASDF里建立上下文。
步骤4：AF订阅EAS算力信息。AF订阅每个EAS的算力信息。
步骤5：AF提供EAS算力信息给5G核心网(5GC)。所述EAS算力信息，包含在EAS deployment information里。
在一个例子中，AF提供EAS算力信息，经过NEF，发给统一数据存储(Unified Data Repository，UDR)。比如，AF通过Nnef_EASDeployment_Create/Update/Delete提供EAS deployment information给NEF，NEF再通过Nudr_DM_Create/Update/Delete将这一信息发送至UDR。
在一个例子中，AF提供EAS算力信息，可能经过NEF，发给NWDAF。比如，AF通过Nnef_EASDeployment_Create/Update/Delete提供EAS deployment information给NEF；然后NEF提供给NWDAF；另外，还可以，NWDAF订阅AF的EAS deployment information，比如，NWDAF订阅Nnef_EventExposure_Subscribe，然后NEF再订阅AF的：Naf_EventExposure_Subscribe，用来获得EAS deployment information(含EAS算力信息)，AF通过Naf_EventExposure_Notify发送EAS deployment information给NEF，NEF再通过Nnef_EventExposure_Notify发送EAS deployment information给NWDAF。
上述EAS deployment information包含EAS算力信息，包括如下1)至3)中的至少之一：
1)本地DNS服务器IP地址(Local DNS server IP address)，可以基于，每个DNAI提供。
2)每个本地DNS服务器所支持的FQDN，以及该FQDN所对应的算力情况。
一种情况是，把这个DNS服务器所支持的FQDN的全部服务器算力都告诉5GC，比如，本地DNS服务器1能解析FQDN＝Tencent.com，且这里的算力情况分别为：10个CPU、5个CPU等等)；还一种是只告诉最大算力，比如，本地DNS服务器1能解析FQDN ＝Tencent.com，且，能够提供的最大算力为10个CPU。
3)每个DNAI的应用标识(Application ID，APP ID)。
步骤6：DNS服务器可以订阅EAS算力信息。这样的话，DNS服务器在解析FQDN的时候，可以把算力最优的EAS的IP地址作为FQDN的解析结果。所述DNS服务器可以以AF的形态，订阅EAS的算力信息。
步骤7：SMF从UDR恢复EAS算力信息，或，从NEF恢复EAS算力信息。所述EAS算力信息，包含在EAS deployment information。这些信息用于SMF为EASDF生成DNS处理规则。此时的处理规则由于是基于新的EAS算力信息生成，考虑了EAS的算力的因素和N6时延的因素。比如，SMF通过Nnef_EASDeployment_Subscribe，获得EAS deployment information。
步骤8：当终端移动，或者N6时延变化，或者EAS算力信息变化的时候，SMF可以更新DNS处理规则，其中，N6时延信息可以来自于NWDAF。
步骤9：SMF可以订阅NWDAF中的每个PSA的N6接口时延，或N3时延，N9时延。
SMF提供自己所控制的PSA ID，IP地址等，发给NWDAF，NWDAF能够收集这些PSA之后的N6时延。
比如，第一通信设备SMF，通过Nnwdaf_AnalyticsSubscription_Subscribe或者：Nnwdaf_AnalyticsInfo_Request，来从NWDAF获取第三信息。其中Nnwdaf_AnalyticsSubscription_Subscribe或者：Nnwdaf_AnalyticsInfo_Request中，包含的第二信息包括：UPF ID，UPF IP地址，UE ID，UE IP地址，Analytics ID＝N3/N6/N9 delay。然后，NWDAF通过Nnwdaf_AnalyticsSubscription_Notify或者：Nnwdaf_AnalyticsInfo_Response，输出N3/N6/N9时延，这样SMF就从NWDAF获得了对应的各个接口时延。
步骤10：UE发送DNS查询，所述查询中包括FQDN，即待解析的域名。
步骤11：EASDF收到UE的DNS查询后，会发送DNS查询中的FQDN到SMF，方法是：发送如下信令Neasdf_DNSContext_Notify Request。
此时SMF有两种方案为EASDF提供DNS处理规则。
方案1：步骤12所述，SMF请求NWDAF，为本条DNS查询提供DNS处理规则，例如，通过如下信令实现：Nnwdaf_AnalyticsSubscription_Subscribe，或者Nnwdaf_AnalyticsInfo_Request。参数输入：Analytics ID＝DNS handling rules，另外把UE IP地址、FQDN、EAS算力信息(也有可能之前AF提供给了NWDAF)等内容也输入给NWDAF。希望NWDAF能够提供针对该UE、该FQDN的DNS处理规则。
方案2：SMF根据EAS算力信息，还有NWDAF提供的N6时延，为本条DNS查询提供DNS处理规则。
步骤13：SMF给EASDF下发DNS处理规则，例如，通过如下信令实现： Neasdf_DNSContext_Update Request。
情况A：DNS处理规则里包括一个IP地址，用于填到DNS查询的ECS option部分。其中，这个IP地址，应该是对应的综合：算力最佳+N6/N3/N9时延最短的IP地址。比如：N6时延最短的PSA对应的IP地址，或，N3时延最短的UPF，或N9时延最短的UPF IP地址。
情况B：DNS处理规则里放一个本地DNS server IP地址。所述本地DNS server IP地址，是对应能够解析出，最佳服务器的DNS服务器。
步骤14：DNS查询被发送至DNS服务器。
步骤15：DNS服务器如果订阅了或者获取了之前这个区域内的最佳算力情况，比如步骤5所述，那么DNS服务器可以为这个UE的FQDN解析出最佳服务器的IP地址。
步骤16：反馈DNS响应。如果这过程中需要插入新的用户面，则插入的PSA是对应到最佳服务器的PSA。
步骤17：终端与EAS建立IP连接。
如图8所示，该实施例主要介绍NWDAF提供N6时延，或N3时延，N9时延等，部分描述可以参见图7所示的实施例，该实施例包括如下步骤：
步骤1：SMF可以订阅NWDAF中的每个PSA的N6接口时延，或N3时延，N9时延。
比如，SMF通过Nnwdaf_AnalyticsSubscription_Subscribe或者：Nnwdaf_AnalyticsInfo_Request，来从NWDAF获取第三信息。其中Nnwdaf_AnalyticsSubscription_Subscribe或者：Nnwdaf_AnalyticsInfo_Request中，包含的第二信息包括：UPF ID，UPF IP地址，UE ID，UE IP地址，Analytics ID＝N3/N6/N9 delay。然后，NWDAF通过Nnwdaf_AnalyticsSubscription_Notify或者：Nnwdaf_AnalyticsInfo_Response，输出N3/N6/N9时延，这样SMF就从NWDAF获得了对应的各个接口时延。
步骤2：NWDAF订阅UPF的服务，例如，通过如下信令实现：Nupf_EventExposure_Subscribe，参数包括：SUPI(UE ID)，Event ID(即：N6 delay)，DNN，N6 interface ID等，以此来获得每个PSA的N3/N9/N6接口时延。
步骤3：UPF通过Nupf_EventExposure_Notify通知NWDAF，某N6接口的时延。
步骤4：NWDAF通过Nnwdaf_AnalyticsSubscription_Notify；或者Nnwdaf_AnalyticsInfo_Response告诉SMF所订阅的N6时延。
如图9所示，该实施例主要介绍NWDAF提供DNS处理规则，部分描述可以参见图7所示的实施例的步骤12，该实施例包括如下步骤。
步骤1：SMF请求NWDAF为DNS查询提供DNS处理规则。
例如，通过如下信令实现：Nnwdaf_AnalyticsSubscription_Subscribe或者：Nnwdaf_AnalyticsInfo_Request。参数输入：Analytics ID＝DNS handling rules，另外把UE  IP地址、FQDN、EAS算力信息(也有可能之前AF提供给了NWDAF)等内容也输入给NWDAF。希望NWDAF能够提供针对该UE，该FQDN的DNS处理规则。
步骤2：如果步骤1中，SMF没有提供EAS算力信息，那么可以有：AF事先提供EAS算力信息，然后，NWDAF订阅了：Nnef_EASDeployment_Subscribe，订阅了EAS算力信息。
步骤3：通过如下信令Nnef_EASDeployment_Notify，告诉NWDAF EAS算力信息。
步骤4：NWDAF通过Nnwdaf_AnalyticsSubscription_Notify；或者Nnwdaf_AnalyticsInfo_Response告诉SMF所生成的针对某UE的DNS查询的DNS处理规则。
图10是根据本申请实施例的第一通信设备的结构示意图，如图10所示，第一通信设备1000包括如下模块。
获取模块1002，用于获取DNS处理规则，所述DNS处理规则用于将终端的DNS查询发送至DNS服务器，所述DNS服务器支持解析所述DNS查询中的FQDN，获得满足第一条件的EAS的IP地址，所述第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优。
发送模块1004，用于发送所述DNS处理规则至第二通信设备。
本申请实施例中，通过对DNS处理规则进行改进，通过该DNS处理规则可以将终端的DNS查询发送至DNS服务器，该DNS服务器支持解析出满足第一条件的EAS的IP地址，第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优，本申请实施例有利于解析出性能较优的EAS，有利于提升终端的通信性能，提升用户体验。
可选地，作为一个实施例，所述DNS处理规则包括如下1)和2)中的至少之一：
1)第一IP地址，所述第一IP地址包括满足所述第一条件的EAS所在的区域的IP地址，所述第一IP地址用于被添加到所述DNS查询中以发送至第一DNS服务器，所述第一DNS服务器包括中央DNS服务器。
2)第二IP地址，所述第二IP地址包括第二DNS服务器的IP地址，所述第二DNS服务器支持解析出满足所述第一条件的EAS的IP地址，或，所述第二DNS服务器与所述终端位于相同的位置，所述第二DNS服务器包括本地DNS服务器。
可选地，作为一个实施例，所述第一IP地址包括如下1)至3)中的至少之一：
1)满足所述第一条件的EAS所在的数据网络DN的IP地址或IP地址段。
2)满足所述第一条件的EAS所在的DN的数据网络接入标识DNAI。
3)第一DNAI对应的PSA的IP地址或地址段，所述第一DNAI包括：满足所述第一条件的EAS所在的DN的DNAI。
可选地，作为一个实施例，所述第二DNS服务器与所述终端位于相同的位置包括：所述第二DNS服务器与所述终端在相同的DNAI下。
可选地，作为一个实施例，所述获取模块1002，用于：请求第三通信设备为所述DNS查询提供DNS处理规则；或者，根据第一信息生成所述DNS处理规则，所述第一信息包括如下至少之一：EAS算力信息，每个PSA的N6时延信息、PSA和RAN的N3时延信息、N9时延信息、UPF处理时延信息；其中，所述EAS算力信息包括：目标区域下FQDN所对应的算力资源信息。
可选地，作为一个实施例，所述DNS查询为终端发送的DNS查询。
可选地，作为一个实施例，所述获取模块1002，用于向所述第三通信设备发送如下1)至4)中的至少之一：1)所述终端的IP地址；2)所述终端的位置信息；3)所述终端发送的DNS查询或所述DNS查询中的FQDN；4)EAS算力信息，所述EAS算力信息包括：目标区域下FQDN所对应的算力资源信息。
可选地，作为一个实施例，所述EAS算力信息包括如下至少之一：1)所述目标区域下，第一FQDN对应的一个或多个EAS的算力资源信息；2)所述目标区域下，第一FQDN对应的具有最大算力资源的EAS；其中，所述第一FQDN为所述第一DNS服务器或所述第二DNS服务器所支持的，能够解析的FQDN。
可选地，作为一个实施例，所述发送模块1004，还用于发送第二信息至第三通信设备；其中，所述第二信息用于获取第三信息，所述第三信息包括如下至少之一：每个PSA的N6时延信息、PSA和RAN的N3时延信息、N9时延信息、UPF的处理时延信息；所述第一通信设备接收来自于所述第三通信设备的所述第三信息；其中，所述第三信息用于第一通信设备生成所述DNS处理规则。
可选地，作为一个实施例，所述第一通信设备还包括更新模块，用于在所述终端移动或第三信息更新的情况下，更新所述DNS处理规则；其中，所述第三信息包括如下至少之一：每个PSA的N6时延信息、PSA和RAN的N3时延信息、N9时延信息、UPF的处理时延信息。
根据本申请实施例的装置1000可以参照对应本申请实施例的方法200的流程，并且，该装置1000中的各个单元/模块和上述其他操作和/或功能分别为了实现方法200中的相应流程，并且能够达到相同或等同的技术效果，为了简洁，在此不再赘述。
图11是根据本申请实施例的第二通信设备的结构示意图，如图11所示，第二通信设备1100包括如下模块。
获取模块1102，用于获取DNS处理规则。
发送模块1104，用于根据所述DNS处理规则，将终端的DNS查询发送至DNS服务器，所述DNS服务器支持解析所述DNS查询中的FQDN，获得满足第一条件的EAS的IP地址，所述第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优。
本申请实施例中，通过对DNS处理规则进行改进，通过该DNS处理规则可以将终端的DNS查询发送至DNS服务器，该DNS服务器支持解析出满足第一条件的EAS的IP 地址，第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优，本申请实施例有利于解析出性能较优的EAS，有利于提升终端的通信性能，提升用户体验。
可选地，作为一个实施例，所述获取模块1102，用于：请求第一通信设备或第三通信设备为所述DNS查询提供DNS处理规则；或者，根据第一信息生成所述DNS处理规则，所述第一信息包括如下至少之一：EAS算力信息，每个PSA的N6时延信息、PSA和RAN的N3时延信息、N9时延信息、UPF处理时延信息；其中，所述EAS算力信息包括：目标区域下FQDN所对应的算力资源信息。
可选地，作为一个实施例，所述获取模块1102，用于向所述第一通信设备发送如下至少之一：1)所述终端的IP地址；2)所述终端的位置信息；3)所述终端发送的DNS查询或所述DNS查询中的FQDN；4)EAS算力信息，所述EAS算力信息包括：目标区域下FQDN所对应的算力资源信息。
可选地，作为一个实施例，所述获取模块1102，用于向所述第三通信设备发送如下至少之一：1)所述终端的IP地址；2)所述终端的位置信息；3)所述终端发送的DNS查询或所述DNS查询中的FQDN；4)EAS算力信息，所述EAS算力信息包括：目标区域下FQDN所对应的算力资源信息。
根据本申请实施例的装置1100可以参照对应本申请实施例的方法300的流程，并且，该装置1100中的各个单元/模块和上述其他操作和/或功能分别为了实现方法300中的相应流程，并且能够达到相同或等同的技术效果，为了简洁，在此不再赘述。
图12是根据本申请实施例的第三通信设备的结构示意图，如图12所示，第三通信设备1200包括如下模块。
生成模块1202，用于生成DNS处理规则。
发送模块1204，用于发送所述DNS处理规则至第一通信设备或第二通信设备，所述DNS处理规则用于将终端的DNS查询发送至DNS服务器，所述DNS服务器支持解析所述DNS查询中的FQDN，获得满足第一条件的EAS的IP地址，所述第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优。
本申请实施例中，通过对DNS处理规则进行改进，通过该DNS处理规则可以将终端的DNS查询发送至DNS服务器，该DNS服务器支持解析出满足第一条件的EAS的IP地址，第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优，本申请实施例有利于解析出性能较优的EAS，有利于提升终端的通信性能，提升用户体验。
可选地，作为一个实施例，所述DNS处理规则包括如下1)和2)中的至少之一：
1)第一IP地址，所述第一IP地址包括满足所述第一条件的EAS所在的区域的IP地址，所述第一IP地址用于被添加到所述DNS查询中以发送至第一DNS服务器，所述 第一DNS服务器包括中央DNS服务器。
2)第二IP地址，所述第二IP地址包括第二DNS服务器的IP地址，所述第二DNS服务器支持解析出满足所述第一条件的EAS的IP地址，或，所述第二DNS服务器与所述终端位于相同的位置，所述第二DNS服务器包括本地DNS服务器。
可选地，作为一个实施例，所述第一IP地址包括如下至少之一：1)满足所述第一条件的EAS所在的数据网络DN的IP地址或IP地址段；2)满足所述第一条件的EAS所在的DN的数据网络接入标识DNAI；3)第一DNAI所对应的PSA的IP地址或地址段，所述第一DNAI包括：满足所述第一条件的EAS所在的DN的DNAI。
可选地，作为一个实施例，所述第二DNS服务器与所述终端位于相同的位置包括：所述第二DNS服务器与所述终端在相同的DNAI下。
可选地，作为一个实施例，所述生成模块1202，用于根据第一信息生成所述DNS处理规则，所述第一信息包括如下至少之一：EAS信息，每个PSA的N6时延信息、PSA和RAN的N3时延信息、N9时延信息、UPF处理时延；其中，所述EAS算力信息包括：目标区域下FQDN所对应的算力资源信息。
可选地，作为一个实施例，所述第三通信设备还包括获取模块，用于获取所述第一信息。
根据本申请实施例的装置1200可以参照对应本申请实施例的方法400的流程，并且，该装置1200中的各个单元/模块和上述其他操作和/或功能分别为了实现方法400中的相应流程，并且能够达到相同或等同的技术效果，为了简洁，在此不再赘述。
图13是根据本申请实施例的第四通信设备的结构示意图，如图13所示，第四通信设备1300包括如下模块。
发送模块1302，用于发送第一信息至第三通信设备或第一通信设备或第二通信设备，所述第一信息用于生成DNS处理规则；其中，所述DNS处理规则用于将终端的DNS查询发送至DNS服务器，所述DNS服务器支持解析所述DNS查询中的FQDN，获得满足第一条件的EAS的IP地址，所述第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优。
本申请实施例中，通过对DNS处理规则进行改进，通过该DNS处理规则可以将终端的DNS查询发送至DNS服务器，该DNS服务器支持解析出满足第一条件的EAS的IP地址，第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优，本申请实施例有利于解析出性能较优的EAS，有利于提升终端的通信性能，提升用户体验。
可选地，作为一个实施例，所述第一信息包括如下至少之一：EAS算力信息，每个PSA的N6时延信息、PSA和RAN的N3时延信息、N9时延信息、UPF处理时延信息；其中，所述EAS算力信息包括：目标区域下FQDN所对应的算力资源信息。
根据本申请实施例的装置1300可以参照对应本申请实施例的方法500的流程，并且， 该装置1300中的各个单元/模块和上述其他操作和/或功能分别为了实现方法500中的相应流程，并且能够达到相同或等同的技术效果，为了简洁，在此不再赘述。
图14是根据本申请实施例的第五通信设备的结构示意图，如图14所示，第五通信设备1400包括如下模块。
发送模块1402，用于发送第三信息至第三通信设备，所述第三信息用于生成DNS处理规则；其中，所述DNS处理规则用于将终端的DNS查询发送至DNS服务器，所述DNS服务器支持解析所述DNS查询中的FQDN，获得满足第一条件的EAS的IP地址，所述第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优。
本申请实施例中，通过对DNS处理规则进行改进，通过该DNS处理规则可以将终端的DNS查询发送至DNS服务器，该DNS服务器支持解析出满足第一条件的EAS的IP地址，第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优，本申请实施例有利于解析出性能较优的EAS，有利于提升终端的通信性能，提升用户体验。
可选地，作为一个实施例，所述第三信息包括如下至少之一：每个PSA的N6时延信息、PSA和RAN的N3时延信息、N9时延信息、UPF的处理时延信息。
可选地，作为一个实施例，所述第三通信设备订阅有所述第五通信设备的服务，所述服务用于获得所述第三信息。
根据本申请实施例的装置1400可以参照对应本申请实施例的方法600的流程，并且，该装置1400中的各个单元/模块和上述其他操作和/或功能分别为了实现方法600中的相应流程，并且能够达到相同或等同的技术效果，为了简洁，在此不再赘述。
可选的，如图15所示，本申请实施例还提供一种通信设备1500，包括处理器1501和存储器1502，存储器1502上存储有可在所述处理器1501上运行的程序或指令，例如，该通信设备1500为网络侧设备时，该程序或指令被处理器1501执行时实现上述服务器选择方法实施例的各个步骤，且能达到相同的技术效果，为避免重复，这里不再赘述。
本申请实施例还提供一种网络侧设备，包括处理器和通信接口，所述处理器和通信接口用于执行图2至图6所示的实施例的步骤。该网络侧设备实施例与上述网络侧设备方法实施例对应，上述方法实施例的各个实施过程和实现方式均可适用于该网络侧设备实施例中，且能达到相同的技术效果。
具体地，本申请实施例还提供了一种网络侧设备。如图16所示，该网络侧设备1600包括：处理器1601、网络接口1602和存储器1603。其中，网络接口1602例如为通用公共无线接口(common public radio interface，CPRI)。
具体地，本发明实施例的网络侧设备1600还包括：存储在存储器1603上并可在处理器1601上运行的指令或程序，处理器1601调用存储器1603中的指令或程序执行图10至图14所示各模块执行的方法，并达到相同的技术效果，为避免重复，故不在此赘述。
本申请实施例还提供一种可读存储介质，所述可读存储介质上存储有程序或指令，该程序或指令被处理器执行时实现上述服务器选择方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。
其中，所述处理器为上述实施例中所述的终端中的处理器。所述可读存储介质，包括计算机可读存储介质，如计算机只读存储器ROM、随机存取存储器RAM、磁碟或者光盘等。
本申请实施例另提供了一种芯片，所述芯片包括处理器和通信接口，所述通信接口和所述处理器耦合，所述处理器用于运行程序或指令，实现上述服务器选择方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。
应理解，本申请实施例提到的芯片还可以称为系统级芯片，系统芯片，芯片系统或片上系统芯片等。
本申请实施例另提供了一种计算机程序/程序产品，所述计算机程序/程序产品被存储在存储介质中，所述计算机程序/程序产品被至少一个处理器执行以实现上述服务器选择方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。
本申请实施例还提供了一种服务器选择系统，包括：终端及网络侧设备，所述网络侧设备可用于执行如上所述的服务器选择方法的步骤。
需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者装置不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者装置所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的相同要素。此外，需要指出的是，本申请实施方式中的方法和装置的范围不限按示出或讨论的顺序来执行功能，还可包括根据所涉及的功能按基本同时的方式或按相反的顺序来执行功能，例如，可以按不同于所描述的次序来执行所描述的方法，并且还可以添加、省去、或组合各种步骤。另外，参照某些示例所描述的特征可在其他示例中被组合。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到上述实施例方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。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可以以计算机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(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端(可以是手机，计算机，服务器，空调器，或者网络设备等)执行本申请各个实施例所述的方法。
上面结合附图对本申请的实施例进行了描述，但是本申请并不局限于上述的具体实施方式，上述的具体实施方式仅仅是示意性的，而不是限制性的，本领域的普通技术人员在本申请的启示下，在不脱离本申请宗旨和权利要求所保护的范围情况下，还可做出很多形式，均属于本申请的保护之内。

Claims (32)

  1. 一种服务器选择方法，包括：
    第一通信设备获取域名解析系统DNS处理规则，所述DNS处理规则用于将终端的DNS查询发送至DNS服务器，所述DNS服务器支持解析所述DNS查询中的全限定域名FQDN，获得满足第一条件的边缘应用服务器EAS的IP地址，所述第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、用户面功能UPF处理时延最短以及EAS算力资源最优；
    所述第一通信设备发送所述DNS处理规则至第二通信设备。
  2. 根据权利要求1所述的方法，其中，所述DNS处理规则包括如下至少之一：
    第一IP地址，所述第一IP地址包括满足所述第一条件的EAS所在的区域的IP地址，所述第一IP地址用于被添加到所述DNS查询中以发送至第一DNS服务器，所述第一DNS服务器包括中央DNS服务器；
    第二IP地址，所述第二IP地址包括第二DNS服务器的IP地址，所述第二DNS服务器支持解析出满足所述第一条件的EAS的IP地址，或，所述第二DNS服务器与所述终端位于相同的位置，所述第二DNS服务器包括本地DNS服务器。
  3. 根据权利要求2所述的方法，其中，所述第一IP地址包括如下至少之一：
    满足所述第一条件的EAS所在的数据网络DN的IP地址或IP地址段；
    满足所述第一条件的EAS所在的DN的数据网络接入标识DNAI；
    第一DNAI对应的PSA的IP地址或地址段，所述第一DNAI包括：满足所述第一条件的EAS所在的DN的DNAI。
  4. 根据权利要求2所述的方法，其中，所述第二DNS服务器与所述终端位于相同的位置包括：
    所述第二DNS服务器与所述终端在相同的DNAI下。
  5. 根据权利要求2所述的方法，其中，所述第一通信设备获取DNS处理规则包括：
    所述第一通信设备请求第三通信设备为所述DNS查询提供DNS处理规则；或者，
    所述第一通信设备根据第一信息生成所述DNS处理规则，所述第一信息包括如下至少之一：EAS算力信息，每个PSA的N6时延信息、PSA和RAN的N3时延信息、N9时延信息、UPF处理时延信息；其中，所述EAS算力信息包括：目标区域下FQDN所对应的算力资源信息。
  6. 根据权利要求5所述的方法，其中，所述DNS查询为终端发送的DNS查询。
  7. 根据权利要求5所述的方法，其中，所述第一通信设备请求第三通信设备为所述DNS查询提供DNS处理规则包括：所述第一通信设备向所述第三通信设备发送如下至少之一：
    所述终端的IP地址；
    所述终端的位置信息；
    所述终端发送的DNS查询或所述DNS查询中的FQDN；
    EAS算力信息，所述EAS算力信息包括：目标区域下FQDN所对应的算力资源信息。
  8. 根据权利要求5或7所述的方法，其中，所述EAS算力信息包括如下至少之一：
    所述目标区域下，第一FQDN对应的一个或多个EAS的算力资源信息；
    所述目标区域下，第一FQDN对应的具有最大算力资源的EAS；
    其中，所述第一FQDN为所述第一DNS服务器或所述第二DNS服务器所支持的，能够解析的FQDN。
  9. 根据权利要求5所述的方法，其中，所述第一通信设备生成所述DNS处理规则之前，所述方法还包括：
    所述第一通信设备发送第二信息至第三通信设备；其中，所述第二信息用于获取第三信息，所述第三信息包括如下至少之一：每个PSA的N6时延信息、PSA和RAN的N3时延信息、N9时延信息、UPF的处理时延信息；
    所述第一通信设备接收来自于所述第三通信设备的所述第三信息；
    其中，所述第三信息用于第一通信设备生成所述DNS处理规则。
  10. 根据权利要求1至9任一项所述的方法，其中，所述方法还包括：
    在所述终端移动或第三信息更新的情况下，所述第一通信设备更新所述DNS处理规则；
    其中，所述第三信息包括如下至少之一：每个PSA的N6时延信息、PSA和RAN的N3时延信息、N9时延信息、UPF的处理时延信息。
  11. 一种服务器选择方法，包括：
    第二通信设备获取DNS处理规则；
    所述第二通信设备根据所述DNS处理规则，将终端的DNS查询发送至DNS服务器，所述DNS服务器支持解析所述DNS查询中的FQDN，获得满足第一条件的EAS的IP地址，所述第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优。
  12. 根据权利要求11所述的方法，其中，所述第二通信设备获取DNS处理规则包括：
    所述第二通信设备请求第一通信设备或第三通信设备为所述DNS查询提供DNS处理规则；或者，
    所述第二通信设备根据第一信息生成所述DNS处理规则，所述第一信息包括如下至少之一：EAS算力信息，每个PSA的N6时延信息、PSA和RAN的N3时延信息、N9时延信息、UPF处理时延信息；其中，所述EAS算力信息包括：目标区域下FQDN所对应的算力资源信息。
  13. 根据权利要求12所述的方法，其中，所述第二通信设备请求第一通信设备为所述DNS查询提供DNS处理规则包括：所述第二通信设备向所述第一通信设备发送如下至少之一：
    所述终端的IP地址；
    所述终端的位置信息；
    所述终端发送的DNS查询或所述DNS查询中的FQDN；
    EAS算力信息，所述EAS算力信息包括：目标区域下FQDN所对应的算力资源信息。
  14. 根据权利要求12所述的方法，其中，所述第二通信设备请求第三通信设备为所述DNS查询提供DNS处理规则包括：所述第二通信设备向所述第三通信设备发送如下至少之一：
    所述终端的IP地址；
    所述终端的位置信息；
    所述终端发送的DNS查询或所述DNS查询中的FQDN；
    EAS算力信息，所述EAS算力信息包括：目标区域下FQDN所对应的算力资源信息。
  15. 一种服务器选择方法，包括：
    第三通信设备生成DNS处理规则；
    所述第三通信设备发送所述DNS处理规则至第一通信设备或第二通信设备，所述DNS处理规则用于将终端的DNS查询发送至DNS服务器，所述DNS服务器支持解析所述DNS查询中的FQDN，获得满足第一条件的EAS的IP地址，所述第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优。
  16. 根据权利要求15所述的方法，其中，所述DNS处理规则包括如下至少之一：
    第一IP地址，所述第一IP地址包括满足所述第一条件的EAS所在的区域的IP地址，所述第一IP地址用于被添加到所述DNS查询中以发送至第一DNS服务器，所述第一DNS服务器包括中央DNS服务器；
    第二IP地址，所述第二IP地址包括第二DNS服务器的IP地址，所述第二DNS服务器支持解析出满足所述第一条件的EAS的IP地址，或，所述第二DNS服务器与所述终端位于相同的位置，所述第二DNS服务器包括本地DNS服务器。
  17. 根据权利要求16所述的方法，其中，所述第一IP地址包括如下至少之一：
    满足所述第一条件的EAS所在的数据网络DN的IP地址或IP地址段；
    满足所述第一条件的EAS所在的DN的数据网络接入标识DNAI；
    第一DNAI所对应的PSA的IP地址或地址段，所述第一DNAI包括：满足所述第一条件的EAS所在的DN的DNAI。
  18. 根据权利要求16所述的方法，其中，所述第二DNS服务器与所述终端位于相同的位置包括：
    所述第二DNS服务器与所述终端在相同的DNAI下。
  19. 根据权利要求16所述的方法，其中，所述第三通信设备生成DNS处理规则包括：
    所述第三通信设备根据第一信息生成所述DNS处理规则，所述第一信息包括如下至 少之一：EAS信息，每个PSA的N6时延信息、PSA和RAN的N3时延信息、N9时延信息、UPF处理时延；其中，所述EAS算力信息包括：目标区域下FQDN所对应的算力资源信息。
  20. 根据权利要求19所述的方法，其中，所述方法还包括：
    所述第三通信设备获取所述第一信息。
  21. 一种服务器选择方法，包括：
    第四通信设备发送第一信息至第三通信设备或第一通信设备或第二通信设备，所述第一信息用于生成DNS处理规则；
    其中，所述DNS处理规则用于将终端的DNS查询发送至DNS服务器，所述DNS服务器支持解析所述DNS查询中的FQDN，获得满足第一条件的EAS的IP地址，所述第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优。
  22. 根据权利要求21所述的方法，其中，所述第一信息包括如下至少之一：EAS算力信息，每个PSA的N6时延信息、PSA和RAN的N3时延信息、N9时延信息、UPF处理时延信息；其中，所述EAS算力信息包括：目标区域下FQDN所对应的算力资源信息。
  23. 一种服务器选择方法，包括：
    第五通信设备发送第三信息至第三通信设备，所述第三信息用于生成DNS处理规则；
    其中，所述DNS处理规则用于将终端的DNS查询发送至DNS服务器，所述DNS服务器支持解析所述DNS查询中的FQDN，获得满足第一条件的EAS的IP地址，所述第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优。
  24. 根据权利要求23所述的方法，其中，所述第三信息包括如下至少之一：
    每个PSA的N6时延信息、PSA和RAN的N3时延信息、N9时延信息、UPF的处理时延信息。
  25. 根据权利要求23所述的方法，其中，所述第五通信设备发送第三信息至第三通信设备之前，所述第三通信设备订阅有所述第五通信设备的服务，所述服务用于获得所述第三信息。
  26. 一种第一通信设备，包括：
    获取模块，用于获取DNS处理规则，所述DNS处理规则用于将终端的DNS查询发送至DNS服务器，所述DNS服务器支持解析所述DNS查询中的FQDN，获得满足第一条件的EAS的IP地址，所述第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优；
    发送模块，用于发送所述DNS处理规则至第二通信设备。
  27. 一种第二通信设备，包括：
    获取模块，用于获取DNS处理规则；
    发送模块，用于根据所述DNS处理规则，将终端的DNS查询发送至DNS服务器，所述DNS服务器支持解析所述DNS查询中的FQDN，获得满足第一条件的EAS的IP地址，所述第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优。
  28. 一种第三通信设备，包括：
    生成模块，用于生成DNS处理规则；
    发送模块，用于发送所述DNS处理规则至第一通信设备或第二通信设备，所述DNS处理规则用于将终端的DNS查询发送至DNS服务器，所述DNS服务器支持解析所述DNS查询中的FQDN，获得满足第一条件的EAS的IP地址，所述第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优。
  29. 一种第四通信设备，包括：
    发送模块，用于发送第一信息至第三通信设备或第一通信设备或第二通信设备，所述第一信息用于生成DNS处理规则；
    其中，所述DNS处理规则用于将终端的DNS查询发送至DNS服务器，所述DNS服务器支持解析所述DNS查询中的FQDN，获得满足第一条件的EAS的IP地址，所述第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优。
  30. 一种第五通信设备，包括：
    发送模块，用于发送第三信息至第三通信设备，所述第三信息用于生成DNS处理规则；
    其中，所述DNS处理规则用于将终端的DNS查询发送至DNS服务器，所述DNS服务器支持解析所述DNS查询中的FQDN，获得满足第一条件的EAS的IP地址，所述第一条件包括如下至少之一：N6时延最短、N3时延最短、N9时延最短、UPF处理时延最短以及EAS算力资源最优。
  31. 一种网络侧设备，包括处理器和存储器，所述存储器存储可在所述处理器上运行的程序或指令，所述程序或指令被所述处理器执行时实现如权利要求1至25任一项所述的服务器选择方法的步骤。
  32. 一种可读存储介质，所述可读存储介质上存储程序或指令，所述程序或指令被处理器执行时实现如权利要求1至25任一项所述的服务器选择方法的步骤。
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