Edge Application Server Selection via DNS Policy Prioritization
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Solution Overview
Problem
Existing 5G networks face challenges in optimizing edge application server selection to minimize latency and improve data routing paths for efficient service delivery, particularly in scenarios like Internet of Vehicles and AR/VR, where 4G network latency is insufficient.
Innovation Solution
A method and apparatus for selecting edge application servers involving a terminal receiving priority indication information from a Session Management Function (SMF) to make DNS policy decisions and send DNS query requests to an Edge Application Server Discovery Function (EASDF) for optimal edge application server discovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the terminal uses traditional DNS resolution in 4G network, then the network coverage is wide, but the network latency is nearly 100 ms which cannot meet the needs of Internet of Vehicles, industrial control, and AR/VR scenarios
Solution Approach 1:
The patent segments the DNS resolution process into two parts: traditional DNS resolution for general services, and edge application server discovery for latency-sensitive services. The terminal performs service type judgment to determine whether to use EASDF discovery or traditional DNS resolution, allowing different resolution paths for different service scenarios while maintaining wide network coverage compatibility
Solution Approach 2:
The EASDF (Edge Application Server Discovery Function) acts as an intermediary between the terminal and edge application servers. It receives discovery requests from terminals, performs edge application server discovery based on terminal location and service requirements, and returns appropriate server addresses, thereby reducing network latency for edge services while maintaining compatibility with traditional network infrastructure
2Productivity
If the terminal sends DNS query requests to traditional DNS servers, then the routing path is straightforward, but the data processing capability and service delivery are not near the network edge where data is generated
Solution Approach 1:
The patent implements dynamic DNS resolution where the terminal adapts its resolution strategy based on service requirements and network conditions. For edge services, the terminal dynamically queries EASDF to obtain optimal edge server addresses, while for traditional services it uses conventional DNS resolution. This dynamic adaptation enables high data processing capability for edge services without requiring complete system restructuring
Solution Approach 2:
The system performs preliminary edge application server discovery through EASDF before actual data transmission. The terminal queries EASDF in advance to obtain the addresses of optimal edge servers based on its location and service requirements, ensuring that data transmission occurs directly to the nearest edge server with adequate processing capability, thereby reducing latency without adding significant operational complexity
Data Source
AI summary
The present disclosure relates to method and apparatus for selecting an edge application server, and element network device, user equipment and storage medium. The method includes: a user equipment receiving first indication information, which is sent by an SMF, wherein the first indication information is used for indicating the priority of domain name system (DNS) information; and the user equipment making a DNS policy decision according to the first indication information, and sending a DNS query request to an EASDF, wherein the DNS query request is used by the EASDF to execute the discovery or selection of an edge application server (EAS).