5G • 5G-Advanced (Rel-18)
Enhanced EAS Discovery
Dynamic Edge Application Server Discovery in 5G Core
Core network DNS and SMF mechanism that detects client application requests and resolves FQDNs directly to the closest local edge server instance.
Technical Explanation
When a connected car or VR headset queries a game server domain (e.g. `cloudgame.service.com`), routing the DNS request to a central server adds 40 ms of delay. Rel-18 Enhanced Edge Application Server (EAS) Discovery allows the local UPF and SMF to intercept DNS queries, resolving them to the IP address of the edge GPU server running in the local base station closet.
Key Functions
- Intercepts application DNS queries to resolve domain names to the nearest edge server
- Ensures mobile user plane traffic routes to edge cloud instances with minimum latency
- Dynamically migrates active EAS bindings when user equipment moves to new cell sectors
- Operates transparently with standard Internet domain name system (DNS) protocols
Specifications
3GPP TS 23.501, TS 23.548 (Rel-18)
Interfaces
N6N3N4 (PFCP)
Related 5G Concepts
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