Cooperative Handover CID Sharing in Wireless Systems
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Solution Overview
Problem
In broadband wireless communication systems, handover processes are hindered by the need for connection identifier (CID) updates and authentication/key updates during handovers between base stations, leading to increased latency and service interruptions.
Innovation Solution
Implementing a cooperative handover method where primary and secondary base stations share the CID of a mobile station, allowing for the selective omission of CID updates and authentication/key updates through the exchange of Ranging Request/Response messages, facilitated by the Neighbor Advertisement message that includes cooperative handover support information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CID update and authentication/key update processes are performed during handover, then security and connection management are maintained, but handover latency increases and service continuity is interrupted
Solution Approach 1:
The patent applies preliminary action by pre-establishing security contexts and authentication credentials at the target base station before handover occurs. The source base station forwards security context information to the target base station in advance, so that when handover happens, the MS can immediately use pre-configured credentials without performing time-consuming authentication procedures, thus reducing handover latency while maintaining security
Solution Approach 2:
The patent applies skipping by allowing the MS to bypass the normal authentication and key update processes during handover. Instead of completing the full authentication sequence, the MS uses pre-shared security contexts to quickly establish connectivity at the target base station, rushing through the handover process while maintaining adequate security through pre-configured credentials
2Reliability
If complete handover procedures including Ranging Request/Response message exchange are performed, then proper connection establishment is ensured, but service interruption occurs during the process
Solution Approach 1:
The patent applies preliminary action by pre-establishing the security context and authentication credentials at the target base station before the actual handover occurs. The source base station forwards necessary security information to the target base station in advance, enabling the mobile station to immediately use pre-configured credentials without performing time-consuming authentication procedures during handover
Solution Approach 2:
The patent applies skipping by allowing the mobile station to bypass the normal authentication and key update processes during handover. Instead of completing the full authentication sequence with Ranging Request/Response messages, the MS uses pre-shared security contexts to quickly establish connectivity at the target base station
Data Source
AI summary
An apparatus and method for supporting a cooperative handover in a broadband wireless communication system. A method for operating a mobile station (MS) for a cooperative handover in a broadband wireless communication system includes determining a handover to a target BS and omitting a CID update process of the MS during the handover process to the target BS, wherein the CID of the MS is shared beforehand between a serving BS and the target BS.