Edge-Aware DNS Lookup for Mobility-Based Edge Server Access
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Solution Overview
Problem
Current DNS systems for Edge server access in wireless networks fail to consider UE mobility, leading to improper operation of Edge applications due to time-limited IP addresses and inconsistent DNS configurations across different data connections.
Innovation Solution
Implementing Edge-aware DNS lookup by initiating a PDU session with a wireless network, transmitting a message indicating UE support for Edge-aware DNS, and receiving an address to an Edge-aware DNS server configured to provide addresses based on UE location and validity areas, allowing the UE to adapt server access based on mobility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional DNS configuration is used for Edge server access, then IP addresses can be obtained for Edge servers, but the IP addresses are time-limited and do not account for UE mobility, leading to suboptimal Edge application performance
Solution Approach 1:
The network node provides DNS server information to the UE during PDU session establishment, enabling the UE to proactively obtain appropriate DNS server addresses before Edge application execution. This preliminary configuration ensures that the UE has access to mobility-aware DNS servers that can provide appropriate IP addresses for Edge servers based on UE location, eliminating the need for repeated DNS lookups and improving application performance.
2Adaptability or versatility
If DNS requests are transmitted outside the operator network (e.g., through Wi-fi), then DNS resolution can be obtained, but a different DNS configuration may be used that does not identify the most appropriate Edge server
Solution Approach 1:
The network node acts as an intermediary by providing the address of an Edge-aware DNS server to the UE. This DNS server serves as a mediator between the UE and Edge servers, receiving DNS requests from the UE and providing IP addresses that are optimized for the UE's current location and network conditions. This intermediary approach ensures that even when UE uses external data connections, the DNS resolution process remains under operator control and selects the most appropriate Edge server.
3Adaptability or versatility
If multiple DNS servers are configured for different data connections, then flexibility in network access is improved, but consistency in Edge server selection is compromised
Solution Approach 1:
The Edge-aware DNS server provided by the network node serves multiple functions: it handles DNS requests regardless of which data connection (3GPP or non-3GPP) is used, provides location-aware IP address resolution, and maintains consistency in Edge server selection. This universal DNS server approach allows the system to maintain a single, consistent DNS configuration that works across different network types while still providing flexible network access.
Data Source
AI summary
Method for use in a User Equipment, UE, for obtaining connection to an Edge server, the method comprising: initiating establishment of a Protocol Data Unit, PDU, session with a wireless network; transmitting, to the wireless network during the establishment, a first message indicating UE support for Edge-aware Domain Name System, DNS, lookup; receiving, from the wireless network during the establishment, a second message comprising an address to a DNS server configured to provide an address to the Edge server.