DNN Replacement via SEPP Policy Interception for 5G Roaming
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Solution Overview
Problem
Existing technologies do not effectively address DNN replacement in roaming scenarios for Next Generation wireless networks, such as 5G NR, leading to inefficiencies in network management and device operation.
Innovation Solution
Implementing a DNN replacement service through a network device, such as a security edge protection proxy (SEPP), which intercepts messages during PDU session establishment to determine and apply DNN replacement based on policy information from the home AM PCF, ensuring seamless network integration in roaming scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If DNN replacement is implemented in roaming scenarios, then network flexibility and device compatibility are improved, but existing technologies do not effectively address DNN replacement leading to inefficiencies in network management
Solution Approach 1:
The patent implements preliminary action by having the SEPP obtain DNN replacement information from the home AM PCF before the PDU session establishment message is forwarded to the visited AMF. This allows the SEPP to proactively determine the replacement DNN and prepare the modified message in advance, eliminating the need for complex real-time decision-making during message forwarding and improving network management efficiency.
Solution Approach 2:
The patent introduces the SEPP as an intermediary component between the home network and visited network. The SEPP intercepts messages, obtains DNN replacement information from the home AM PCF, determines whether DNN replacement should be applied, and forwards the modified or original messages to the visited AMF. This intermediary approach enables DNN replacement in roaming scenarios without requiring direct coordination between home and visited networks, thereby improving adaptability while maintaining management efficiency.
2Reliability
If message interception and DNN replacement are performed, then seamless network integration in roaming scenarios is achieved, but device complexity and processing overhead increase
Solution Approach 1:
The patent applies local quality by making the DNN replacement decision specific to each message and scenario. The SEPP determines whether to apply DNN replacement on a per-message basis by checking if the DNN in the intercepted message matches the DNN in the obtained replacement information. This selective approach ensures seamless network integration only where needed, avoiding unnecessary processing complexity for messages that don't require replacement.
Solution Approach 2:
The SEPP performs preliminary actions by obtaining DNN replacement information from the home AM PCF before processing the PDU session establishment message. This advance preparation allows the SEPP to make quick comparison and determination decisions without complex real-time analysis, reducing processing overhead while maintaining reliable seamless integration.
3Measurement precision
If DNN replacement information is obtained from home AM PCF, then accurate DNN replacement is enabled, but additional communication steps and processing time are required
Solution Approach 1:
The patent implements preliminary action by having the SEPP obtain DNN replacement information from the home AM PCF before the PDU session establishment message is fully processed. This advance retrieval of replacement information minimizes the time required for the actual replacement decision, as the SEPP only needs to perform a simple comparison between the intercepted DNN and the pre-obtained replacement DNN, thereby maintaining high accuracy while reducing processing time loss.
Solution Approach 2:
The system implements feedback by having the SEPP obtain DNN replacement information from the home AM PCF based on the intercepted message content. The home AM PCF provides feedback in the form of replacement DNN information that is specifically tailored to the current communication scenario, ensuring accurate DNN replacement while the feedback mechanism is optimized to minimize communication overhead and processing time.
Data Source
AI summary
A method, a network device, and a non-transitory computer-readable storage medium are described in relation to a data network name (DNN) replacement service. The DNN replacement service may be provided in a roaming context associated with an end device. The DNN replacement service may be implemented by a network device of a home core network of the end device. The network device may obtain a policy pertaining to a session establishment between a visited core network and a home core network. The network device may determine whether DNN replacement is applicable based on the policy. The network device may modify a message to establish the session creation by including a replacement DNN when DNN replacement is applicable.