UE DNS Cache Updates for Edge Handover Continuity

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Solution Overview

Problem

Existing wireless communication systems face inefficiencies in updating Domain Name System (DNS) caches of user equipment (UE) during handovers or application context transfers, leading to failed edge computing requests due to outdated DNS information, which consumes server resources and causes service interruptions.

Innovation Solution

The UE modifies its DNS cache by updating or flushing DNS information based on specific messages related to handovers or application context transfers, ensuring timely synchronization with edge application servers, thereby facilitating efficient edge computing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If the UE stores DNS information in a DNS cache for edge application server access, then edge computing request processing is simplified and faster, but the DNS cache becomes outdated during handovers or application context transfers, leading to failed requests

Engineering Contradiction:

Improveedge computing request processing speedVSAvoidDNS information accuracy

Core Design Contradiction:

SpeedVSReliability

Solution Approach 1:

The system implements feedback by monitoring handover messages and application context transfer messages to detect when DNS cache information becomes outdated. Upon detecting such events, the UE automatically flushes the DNS cache and performs new DNS lookups, ensuring the DNS information remains accurate and synchronized with the current network state.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system performs preliminary actions by proactively flushing the DNS cache when handover or application context transfer messages are received, before any failed requests occur. This preventive approach ensures that outdated DNS information is cleared in advance, preventing subsequent request failures due to stale cache data.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If the UE frequently updates or flushes the DNS cache to maintain accuracy, then DNS information remains current during mobility events, but additional network messages and processing overhead increase

Engineering Contradiction:

ImproveDNS information accuracyVSAvoidnetwork message processing overhead

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The system applies partial action by selectively flushing only the DNS cache entries related to edge application servers when handover or application context transfer messages are detected, rather than performing comprehensive cache updates. This targeted approach maintains DNS information accuracy while minimizing unnecessary network messages and processing overhead.

Inventive Principle:

Principle #16Partial or excessive action

3Loss of time

If the UE maintains DNS cache information for quick edge application server access, then request processing latency is reduced, but service interruptions occur when the UE moves to a new base station or application context is transferred

Engineering Contradiction:

Improverequest processing latencyVSAvoidservice continuity

Core Design Contradiction:

Loss of timeVSReliability

Solution Approach 1:

The system uses feedback from handover messages and application context transfer messages to detect mobility events and service continuity risks. When such events are detected, the UE automatically flushes the DNS cache and performs fresh DNS lookups, ensuring that service continuity is maintained despite UE movement or application context transfers.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system performs preliminary DNS cache flushing and renewal actions upon detecting handover or application context transfer messages, before service interruptions can occur. This proactive approach ensures that updated DNS information is available in time, preventing service disruptions and maintaining continuous edge computing functionality during mobility events.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12549514B2User equipment cache modification for edge computing

Publication Date: 2026.02.10 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may store, in a domain name system (DNS) cache, DNS information associated with an edge application server at which an application context, associated with an application client resident on the UE, is located. The UE may receive a first message associated with a handover of the UE or a second message associated with a transfer of the application context. The UE may modify the DNS cache, by updating the DNS information or flushing the DNS information, based at least in part on receiving the first message or the second message. Numerous other aspects are provided.