Control Plane Server Session Mobility Management
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Solution Overview
Problem
Current mobile communication systems face challenges in maintaining service quality due to the lack of mobility management for sessions offloaded to fixed networks, leading to service disruptions when users move between coverage areas, and require costly infrastructure upgrades to handle increased data transmission demands.
Innovation Solution
A method and apparatus for controlling sessions in a mobile communication network that involves receiving tracking area update requests, determining the need for gateway relocation, releasing established sessions, and re-establishing sessions through a path over fixed network nodes, ensuring seamless mobility management and reduced network overload.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sessions are offloaded to fixed networks for mobile users, then network overload is reduced and infrastructure costs are decreased, but service continuity is disrupted when users move between coverage areas
Solution Approach 1:
The system performs preliminary actions by establishing mobility management mechanisms before service disruption occurs. When a user moves to a new coverage area, the target base station proactively initiates session re-establishment procedures by communicating with the serving server, ensuring continuous service without interruption to the user.
Solution Approach 2:
The serving server acts as an intermediary between the source and target base stations during handover. It receives context information from the source base station, determines whether gateway relocation is needed, and coordinates the session re-establishment with the target base station, ensuring seamless service continuity during mobility.
2Reliability
If gateway relocation is performed during mobility, then service continuity is maintained, but network complexity and signaling overhead increase
Solution Approach 1:
The system applies local quality by making gateway relocation decisions based on specific local conditions rather than uniformly for all users. The serving server evaluates context information including user location, network load, and session type to determine whether gateway relocation is necessary, thereby reducing unnecessary complexity while maintaining service continuity where needed.
Solution Approach 2:
The system changes parameters dynamically by adjusting gateway selection based on mobility state and network conditions. When a user is stationary, sessions remain offloaded to local fixed networks. When mobility is detected, the system changes the network path parameter to route through appropriate gateways, balancing complexity and service continuity.
3Reliability
If all data transmission is routed through mobile network gateways, then service continuity during mobility is ensured, but network infrastructure costs and overload increase
Solution Approach 1:
The system segments data transmission paths by separating mobile network traffic from fixed network traffic. User sessions are divided into those handled by mobile network gateways and those offloaded to fixed network gateways, allowing each network type to optimize its resource usage and reducing overall infrastructure burden while maintaining service continuity.
Solution Approach 2:
The system implements dynamic path selection that adapts to user mobility state. When users are stationary, data transmission is dynamically routed through fixed network gateways to reduce mobile network load. When users move, the system dynamically switches to mobile network gateway routing to ensure service continuity, optimizing network capacity utilization.
Data Source
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AI summary
Disclosed is a method of controlling a session in a serving server taking charge of the control plane within a mobile communication network. The control method may include receiving, by the serving server, a tracking area update (TAU) request message of a terminal from a target base station; retrieving, by the serving server, a previous server that has taken charge of the control plane for the terminal; receiving, by the serving server and from the retrieved previous server, a context response message comprising information indicating that a session for the terminal had been established to be passed through a path over the nodes within a fixed network different from a mobile communication network; deciding, by the serving server, whether gateway relocation is needed; releasing, by the serving server, the established session; transmitting, by the serving server, an accept message comprising information for the processing result to the terminal through the target base station; and establishing, by the serving server a session passing through a path over the nodes within a fixed network different from a mobile communication network based on the information.