Anchor Gateway Relocation for Seamless Session Continuity
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Solution Overview
Problem
In 5G wireless communication systems, the relocation of an anchor gateway can cause service disruptions due to changes in IP addresses, leading to degradation of User Experience (QoE) as ongoing IP flows are not recognized during the relocation process, especially in scenarios with high user mobility.
Innovation Solution
The proposed solution involves a method for relocating an anchor gateway in a wireless communication system by considering the flow state and session continuity levels, allowing for time-independent and time-dependent P-GW relocation, ensuring that the relocation does not negatively impact the Quality of Experience (QoE) by maintaining session continuity only when necessary, using subscriber and operator policies to determine the optimal P-GW relocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the anchor gateway is relocated to improve network efficiency, then network efficiency is improved, but service disruption occurs due to IP address changes
Solution Approach 1:
The patent applies preliminary action by establishing a correspondence relationship between the first anchor gateway and second anchor gateway before actual relocation occurs. The network entity pre-configures the mapping between old and new gateway addresses, enabling seamless traffic redirection without service interruption when the anchor gateway is relocated.
Solution Approach 2:
The patent uses an intermediary mechanism in the form of a correspondence relationship that mediates between the old anchor gateway and new anchor gateway. This intermediary mapping allows traffic to be smoothly transitioned from the first gateway to the second gateway, preventing service disruption during the relocation process.
2Reliability
If session continuity is maintained during gateway relocation, then service continuity is preserved, but system complexity increases
Solution Approach 1:
The patent extracts the session continuity management function from the complex gateway relocation process by maintaining a separate correspondence relationship table. This extracted mechanism independently handles the mapping between old and new gateway addresses, preserving session continuity without adding complexity to the core relocation logic.
3Reliability
If the local P-GW is maintained for high mobility users, then session continuity is preserved, but network optimization is reduced
Solution Approach 1:
The patent applies dynamics by making the anchor gateway selection adaptive rather than static. The system can dynamically choose to maintain the local P-GW for users requiring session continuity while allowing P-GW relocation for users where optimization is prioritized. The correspondence relationship mechanism enables flexible switching between these modes based on user mobility patterns and service requirements.
Data Source
AI summary
The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). An apparatus and method for managing a connection point with a data network in a wireless communication system is provided. A method of a terminal in a wireless communication system includes: receiving, from a network entity, a request for a relocation of an anchor gateway for connecting with a data network; and transmitting a message requesting the relocation of the anchor gateway to the network entity at a time which is determined based on a rule instructed by the request.