Parallel Radio Link Recovery and Re-establishment
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Solution Overview
Problem
Conventional mobile communication systems face a conflict between reliability and latency in radio link failure detection and declaration, leading to inefficient handling of radio link problems, which results in increased latency and unnecessary connection re-establishment procedures.
Innovation Solution
A method where a communication device initiates both a recovery procedure for the existing radio link and a re-establishment procedure for an alternative link before a radio link failure is declared, allowing these procedures to be performed in parallel or simultaneously, reducing latency and improving handling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the recovery procedure is performed sequentially before declaring radio link failure, then the reliability of connection maintenance is improved, but the latency increases and connection re-establishment is delayed
Solution Approach 1:
The patent applies preliminary action by initiating the re-establishment procedure in advance before the radio link failure is formally declared. When a radio problem is detected, the UE starts both the recovery procedure on the existing radio link and the re-establishment procedure on an alternative radio link simultaneously. This allows the re-establishment to be ready faster, reducing latency while maintaining reliability through the dual-procedure approach.
2Reliability
If the radio link failure detection is made more reliable by extending the recovery procedure time, then false failures are avoided, but the time to detect and declare actual failures increases
Solution Approach 1:
The patent resolves this contradiction by performing preliminary action - starting the re-establishment procedure before the failure declaration. This way, even if the failure detection takes longer to ensure reliability, the re-establishment is already in progress, compensating for the extended detection time and maintaining fast overall response.
Solution Approach 2:
The patent applies continuity of useful action by running both the recovery procedure and re-establishment procedure simultaneously rather than sequentially. This continuous parallel execution ensures that while reliability checks are performed thoroughly, the useful action of re-establishment continues without interruption or delay.
3Productivity
If connection re-establishment is avoided by maintaining the initial radio link, then processing load and latency are reduced, but the connection may fail when the initial link is truly compromised
Solution Approach 1:
The patent applies preliminary action by preparing the re-establishment procedure in advance before the initial link is fully declared failed. This allows the system to maintain low processing load during normal operation while having the re-establishment ready to execute immediately when needed, thus balancing productivity and reliability.
Solution Approach 2:
The patent changes the operational parameter from sequential to parallel execution of procedures. By initiating both recovery and re-establishment simultaneously upon radio problem detection, the system dynamically adjusts its behavior based on link conditions, maintaining efficiency when possible and reliability when necessary.
Data Source
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AI summary
There are provided measures for enabling/realizing more efficient radio link problem handling in a mobile communication system. Such measures exemplarily comprise detecting a radio problem of a radio link carrying a network connection of a communication device, and initiating a recovery procedure for recovering the connection on said radio link and a re-establishment procedure for re-establishing the connection on an alternative radio link, upon detection of the radio link problem, before a radio link failure of said radio link is declared.