Mobile Identity Indicator for Cellular Handover Failure Analysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current cellular wireless communication systems lack the ability to identify specific mobile stations during handovers, making it difficult to analyze and adjust radio network parameters to improve handover performance, as existing methods cannot recognize individual UE experiences during failures like too early or wrong cell handovers.
Innovation Solution
A method where the second network control node transmits a mobile identity indicator to the first network control node upon handover or radio link failure, allowing the first network control node to identify the mobile station and store context information for analyzing and adjusting mobility parameters, such as handover offsets, to prevent similar failures in future handovers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If handover procedures are implemented in cellular wireless communication systems, then mobile stations can be handed over between cells to maintain connectivity, but the system cannot identify specific mobile stations during handovers, making it difficult to analyze and adjust radio network parameters
Solution Approach 1:
The patent applies preliminary action by storing context information and mobile station identifiers at the source network control node before the handover failure occurs. This allows the system to have the necessary identification data ready when a handover failure happens, enabling subsequent analysis and parameter adjustment without losing the mobile station identity.
Solution Approach 2:
The patent implements feedback by transmitting mobile identity indicators from the target network control node back to the source network control node after a handover failure. This feedback loop enables the source node to identify which mobile station experienced the failure, analyze the specific conditions, and adjust radio network parameters accordingly to prevent similar failures.
2Loss of information
If mobile identity indicators are transmitted between network control nodes, then mobile stations can be identified for analyzing radio network parameters, but the signaling complexity and overhead increase
Solution Approach 1:
The patent extracts only the essential mobile identity indicator information needed for identification from the complete mobile station context. By transmitting only this specific identifier rather than full context information, the system achieves mobile station identification capability while minimizing signaling overhead and complexity.
Solution Approach 2:
The patent uses copying by creating and transmitting a simplified copy of the mobile station identity (mobile identity indicator) rather than the complete mobile station context. This copy contains sufficient information for identification and analysis purposes while being much more compact, reducing signaling complexity.
Data Source
AI summary
Method and apparatus in a cellular wireless communication system are provided. A mobile station is handed over from a first network control node to a second network control node. A second network control node transmits a mobile identity indicator embedded in a handover report message to the first network control node after the successful handover. The transmitting is triggered by an occurrence of a handover failure or a radio link failure for the mobile station while the mobile station is connected to the second network control node. The first network control node receives the mobile identity indicator and identifies the mobile station using the mobile identity indicator.