UE DNS Query Handling for Edge Application Services
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in efficiently handling DNS queries due to the potential for user equipment (UE) to use different DNS settings than those provided by the network, leading to suboptimal routing and increased latency.
Innovation Solution
The system allows user equipment (UE) to detect and manage DNS queries independently of network settings, enabling the UE to redirect or block queries based on its capabilities, with network entities like SMF and UPF receiving notifications and instructions to enforce or modify DNS settings for optimal routing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network provides DNS settings to the UE, then the network can control DNS query routing, but the UE may use different DNS settings leading to suboptimal routing and increased latency
Solution Approach 1:
The UE detects whether it is using the network-provided DNS settings and feeds back this information to the network. The network receives notification when the UE uses different DNS settings, enabling the network to respond by providing alternative DNS settings or taking corrective action to ensure optimal routing.
Solution Approach 2:
The network proactively provides DNS settings to the UE before the UE can potentially use suboptimal settings. The network also prepares alternative DNS settings in advance that can be quickly deployed when suboptimal usage is detected, preventing latency issues before they occur.
2Adaptability or versatility
If the UE independently manages DNS queries, then routing flexibility improves, but network control over DNS settings is reduced
Solution Approach 1:
The UE independently detects and manages DNS settings while providing feedback to the network about its DNS usage status. This allows the UE to maintain adaptability in managing DNS queries while the network retains oversight through the feedback mechanism, coordinating complex settings without direct micromanagement.
Solution Approach 2:
The UE autonomously detects whether it is using network-provided DNS settings and determines its own DNS query routing. The UE serves itself in managing DNS configurations while notifying the network, reducing the need for complex network-controlled coordination mechanisms.
3Productivity
If the network monitors DNS queries, then routing optimization is improved, but network overhead increases
Solution Approach 1:
Instead of continuous monitoring, the UE provides feedback to the network about its DNS settings usage. This event-driven approach allows the network to optimize routing based on actual UE behavior without the continuous overhead of active monitoring, reducing energy consumption while maintaining routing efficiency.
Solution Approach 2:
The UE performs self-detection of its DNS settings usage and autonomously reports this information to the network. This shifts the detection burden from the network to the UE, allowing the network to optimize routing based on UE-provided information rather than expending energy on active monitoring.
Data Source
AI summary
A UE transmits an indication of a capability for at least one of determining a domain name system (DNS) parameter for a DNS query that is different than a DNS setting from a network and redirecting the DNS query based on the DNS setting from the network. The UE receives, from the network, an instruction to monitor DNS queries based on the capability of the UE and enforcing the DNS settings from the network. An SMF receives, from a UE, an indication of a capability for at least one of determining a DNS parameter for a DNS query that is different than a DNS setting from a network and redirecting the DNS query based on the DNS setting from the network. The apparatus transmits, to the UE, an instruction to monitor DNS queries and to enforce the DNS settings from the network based on the capability of the UE.