Selective DNS Provisioning for Multi-Anchor PDU Sessions
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Solution Overview
Problem
Existing DNS configuration methods fail to efficiently handle DNS queries for PDU sessions with multiple PSA anchors, leading to increased difficulty and decreased efficiency due to inappropriate selection of DNS servers, especially in mixed deployments where applications are accessed via both central and local DNs.
Innovation Solution
A method and apparatus that generate DNS information and decide whether to transmit it to the UE, network, or both, based on a DNS configuration support indication, ensuring appropriate DNS server selection by considering local and central DNS servers for efficient DNS resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If DNS information is transmitted only to the network, then network control over DNS resolution is improved, but DNS resolution efficiency for edge applications deteriorates
Solution Approach 1:
The patent segments DNS information transmission into two paths: network layer transmission for general DNS control and application layer transmission for edge-specific DNS resolution. This allows the network to maintain control over overall DNS resolution while edge applications can efficiently access local DNS servers without full network intervention.
Solution Approach 2:
The patent introduces an intermediary mechanism where the UE receives DNS information from the network and can selectively use it or override it with application-layer DNS information. This intermediary approach balances network control with edge efficiency by allowing the UE to mediate between network-provided DNS settings and application-specific DNS requirements.
2Adaptability or versatility
If DNS information is transmitted to both UE and network, then DNS resolution flexibility is improved, but configuration complexity increases
Solution Approach 1:
The patent implements dynamic DNS information transmission where the network decides whether to send DNS information to the UE based on application-layer indicators. The system can adaptively switch between transmitting DNS information to the UE, transmitting only to the network, or transmitting to both, depending on the specific edge application requirements and network conditions.
Solution Approach 2:
The patent changes the transmission parameter (destination of DNS information) based on the type of edge application and network conditions. By dynamically adjusting whether DNS information is sent to UE, network, or both, the system optimizes between flexibility and complexity for different deployment scenarios.
3Speed
If local DNS servers are used for edge applications, then access speed is improved, but security risk from DNS spoofing increases
Solution Approach 1:
The patent implements a feedback mechanism where the network receives DNS information from edge applications and can validate or override local DNS resolutions. The network layer maintains the ability to provide authoritative DNS information that can correct or verify local DNS resolutions, creating a feedback loop that mitigates spoofing risks while preserving local access speed.
Solution Approach 2:
The patent applies preliminary action by having the network pre-provision DNS information to the UE before edge application execution. This allows the UE to have local DNS cache populated in advance, enabling fast local resolution while the network retains the ability to update or correct DNS information, thereby preventing spoofing through pre-established trusted DNS data.
Data Source
AI summary
Method and apparatus for improvement of DNS configuration for applications are disclosed. A method performed at a server comprises generating Domain Name System (DNS) information; deciding whether to transmit the DNS information to a User Equipment (UE) or to a network or to both the UE and the network; and transmitting the DNS information for use with at least one application associated with the UE according to the decision.