Foreign Agent Relocation in WiMAX Networks
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Solution Overview
Problem
Conventional WiMAX techniques for foreign agent relocation are inadequate, as they are loosely linked with location update procedures, often occur too late, and lack efficient communication mechanisms, leading to network resource and management issues.
Innovation Solution
The method involves a system where a second foreign agent receives a location update request from a mobile station, determines whether to provide access, requests and receives access information from a database, and initiates FA relocation independently of the location update process, allowing timely and efficient FA migration even in idle mode, with the old FA being notified to release resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If foreign agent relocation is performed using conventional WiMAX techniques, then the relocation process can be executed, but it occurs too late and is loosely linked with location update procedures, leading to network resource mismanagement
Solution Approach 1:
The patent applies preliminary action by triggering FA relocation at the location update stage, before the mobile station actually moves to a new foreign agent. The source FA detects the location update request and initiates relocation procedures in advance, including notifying the target FA and preparing resource allocation, so that when the MS moves, the relocation is already complete or in progress, preventing network resource mismanagement.
2Loss of time
If foreign agent relocation is tightly coupled with location update procedures, then timing is improved, but the complexity of the location update process increases
Solution Approach 1:
The patent applies segmentation by separating the FA relocation process from the location update procedure. While they are triggered together, they operate as independent parallel processes: the location update follows conventional procedures, while FA relocation executes its own sequence including source FA detection, target FA notification, and resource allocation. This reduces overall system complexity by allowing each process to be optimized independently.
3Ease of operation
If foreign agents maintain resources for mobile stations in idle mode, then access can be provided when needed, but network resources are wasted when the mobile station moves to a different foreign agent
Solution Approach 1:
The patent applies feedback by implementing a notification mechanism where the source FA receives information from the target FA about mobile stations that have moved. The target FA sends a notification message to the source FA containing the MS ID and foreign agent ID, enabling the source FA to identify and release resources for mobile stations that are no longer in its coverage area, thus eliminating resource waste while maintaining access capability for active connections.
Data Source
AI summary
Method and system for foreign agent relocation in wireless network. According to an embodiment, the present invention provides a system for providing wireless access. The system includes a service network that include a database for storing information associated with providing network connection. The system also includes a first access network that is configured to provide a first wireless access in a first location. The system further includes a mobile station that is associated with the first access network, the mobile station being configured to send location update messages in an idle mode. The method also includes a second access network that is configured to provide access for the mobile station. The second access network is configured to provide a second wireless access in a second location. The system also includes a third access network that is configured to receive a first location update message from the mobile station in the idle mode.