Call Re-establishment Signal Threshold Optimization
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Solution Overview
Problem
Existing call re-establishment algorithms in GSM networks do not allow network operators to specify minimum radio channel quality criteria for initiating call re-establishment after a radio link failure, leading to inefficient re-establishment attempts in poor channel quality conditions, which can result in unnecessary signaling and processing overhead.
Innovation Solution
Implementing a signal level threshold in each network cell, where call re-establishment is initiated only if the received signal level exceeds a predefined minimum threshold, thereby minimizing instances of failed re-establishment attempts and optimizing network resource use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If call re-establishment is enabled without signal level threshold criteria, then the probability of dropped voice calls is minimized, but unnecessary signaling and processing overhead occurs in poor channel quality conditions
Solution Approach 1:
The patent introduces a signal level threshold parameter that must be satisfied before call re-establishment is initiated. This parameter change filters out re-establishment attempts in poor channel conditions, reducing unnecessary network signaling and processing while maintaining reliability in suitable conditions.
Solution Approach 2:
The system uses feedback from signal level measurements to control the call re-establishment process. By continuously monitoring signal quality and comparing it against the threshold, the network can intelligently decide whether to permit re-establishment, avoiding waste of resources in poor conditions while maintaining service in good conditions.
2Loss of energy
If call re-establishment is disabled to minimize network resource use, then signaling overhead is reduced, but user experience deteriorates with increased call drops
Solution Approach 1:
By introducing and adjusting the signal level threshold parameter, the system finds an optimal balance between resource conservation and service reliability. The threshold can be tuned to allow re-establishment only when signal conditions indicate a reasonable chance of success, thereby reducing unnecessary resource consumption while maintaining user experience.
3Reliability
If call re-establishment attempts are made in poor channel quality conditions, then call continuity is maintained, but success probability decreases and network resources are wasted
Solution Approach 1:
The patent uses signal level threshold as a gatekeeping parameter that must be satisfied before re-establishment proceeds. This ensures that re-establishment attempts are only made when channel conditions are sufficiently good, thereby maintaining high success rates while preserving call continuity availability when conditions permit.
Data Source
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AI summary
A method for implementing call re-establishment using a user equipment (UE) configured to communicate with a wireless communication network includes detecting at least one of a radio link failure and a protocol failure of a connection between the UE and a serving cell. A target cell of the wireless communication network is selected and a received signal level for the target cell is compared to a signal level threshold. When the received signal level for the target cell exceeds the signal level threshold, call re- establishment is initiated on the target cell. The signal level threshold may be encoded within a system information type 21bis message, or a system information element. In some cases, the signal level threshold is equal to a minimum signal level required on the target cell.