Network Anchor Point Address Management for Seamless Handover
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Solution Overview
Problem
Current technologies face challenges in seamlessly handing over a terminal between 3GPP and non-3GPP access networks due to differences in air interface, authentication, and core network entities, leading to data loss and service disruption, as the network anchor point address changes, making it difficult to maintain continuous service.
Innovation Solution
A method and communication system that stores and deletes the address of a network anchor point on a network server, allowing for consistent anchor point management across different access networks, ensuring service continuity by registering and deregistering the anchor point address as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the terminal uses different methods to obtain network anchor point address in 3GPP and non-3GPP networks, then the access process is simplified, but the network anchor point changes during handover causing data loss
Solution Approach 1:
The network server pre-stores the network anchor point address before handover occurs. When the terminal moves from 3GPP to non-3GPP network, the server already has the anchor point address ready, eliminating the need for reselection and ensuring continuous service without data loss.
Solution Approach 2:
The network server acts as an intermediary that stores and manages the network anchor point address. Instead of the terminal directly obtaining the address through different methods in different networks, the server mediates by providing the stored address to maintain consistency during handover.
2Adaptability or versatility
If the network anchor point address is changed during handover between access networks, then the terminal can access the new network, but data loss occurs and service continuity is broken
Solution Approach 1:
The network anchor point address is determined and stored in advance in the network server before the handover process. This preliminary action ensures that when the terminal accesses the new non-3GPP network, the same anchor point address is used, preventing data loss while maintaining adaptability to different networks.
3Ease of operation
If the terminal performs reattachment process when moving to non-3GPP network, then the terminal can establish connection, but PDN gateway reselection is triggered causing service disruption
Solution Approach 1:
The network server stores the network anchor point address and associated PDN gateway information in advance. During handover, this pre-stored information is used to maintain the existing PDN gateway connection, eliminating the need for PDN gateway reselection and reducing service disruption time while still allowing connection establishment.
Data Source
AI summary
A method, apparatus and communication system for registering address information of a network anchor point to a network server, the method including receiving, by a packet data network gateway, a request message from a mobility management entity, determining, by the packet data network gateway in response to the request message, to register identity information of the packet data network gateway to a home subscriber server, and registering, to the home subscriber server, by the packet data network gateway in response to the determining to register the identity information, the identity information of the packet data network gateway and an access point name corresponding to the packet data network gateway.