hSEPP Routing of PDU Session Requests in Overlapping Coverage
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Solution Overview
Problem
Existing 5G networks lack a standard procedure to prevent accidental roaming in overlapping coverage areas, leading to unnecessary roaming charges for users and network operators.
Innovation Solution
Implementing a home Security Edge Protection Proxy (hSEPP) that determines network availability based on identification information to restrict accidental roaming, using techniques like the home network's Security Edge Protection Proxy (hSEPP) to manage PDU session requests and maintain preference for the home network in overlapping coverage areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a wireless device automatically connects to the visited network in overlapping coverage areas, then service availability is improved, but unnecessary roaming charges are incurred
Solution Approach 1:
The system performs preliminary determination of home network availability before the wireless device connects to the visited network. The hSEPP receives the PDU session request, determines whether home network nodes are available in the current location, and only then allows or rejects the roaming connection. This preliminary check prevents unnecessary roaming charges by avoiding connections to visited networks when home network service is still available.
2Loss of energy
If the home network restricts roaming in overlapping areas, then roaming charges are reduced, but service continuity may be affected
Solution Approach 1:
The system implements a feedback mechanism where the hSEPP continuously monitors PDU session requests and determines home network availability based on current location and network state. The system dynamically allows or rejects roaming connections based on real-time conditions, ensuring service continuity is maintained by allowing roaming only when necessary (when home network is unavailable) while preventing unnecessary roaming charges when home network service is available.
Data Source
AI summary
The disclosed technology performs routing of PDU session requests in overlapping coverage areas based on identification information associated with the PDU session requests. Upon receiving the PDU session request initiated from a wireless device, a roaming proxy of a home network retrieves identification information associated with the PDU session request. Based on the identification information, the roaming proxy determines whether the PDU session request was created in an overlapping area of two coverage areas of the home network and a visited network. The roaming proxy notifies a network node of the home network to allow or reject the PDU session request based on the determination. The roaming proxy further notifies a network node of the home network to de-register the wireless device from the visited network.