Dynamic Target Frame Error Rate Adjustment for Wireless Call Drop Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In cellular wireless systems, increasing the target Frame Error Rate (FER) to reduce noise levels can lead to call drops due to insufficient signal reception and decoding by base stations, as mobile stations may transmit at lower power levels, causing communication quality issues.
Innovation Solution
Artificially increasing the target FER for a portion of the call drop timer period for specific mobile stations to reduce noise, while ensuring the FER returns to normal levels for the remainder of the period to maintain communication quality and prevent call drops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the target FER is increased to reduce noise levels, then air interface noise is decreased and system capacity is improved, but call quality deteriorates and call drops occur
Solution Approach 1:
The patent applies dynamics by making the target FER adjustable rather than fixed. The base station dynamically modifies the target FER value based on detected call drop conditions, transitioning from a static parameter to a dynamic one that adapts to system performance. This allows the system to optimize noise reduction while preventing call quality deterioration through real-time parameter adjustment.
Solution Approach 2:
The patent implements feedback by monitoring call drop events and using this information to adjust the target FER. When call drops are detected, the system feeds back to the base station to reduce the target FER, creating a closed-loop control mechanism that balances noise reduction with call quality maintenance, preventing the harmful effect of call drops while preserving the benefit of reduced noise.
2Use of energy by moving object
If mobile stations transmit at lower power levels to conserve battery life, then energy consumption is reduced, but signal reception quality deteriorates causing call drops
Solution Approach 1:
The patent applies parameter changes by modifying the target FER parameter to indirectly control mobile station transmit power. By adjusting the target FER, the system changes the power control parameters that mobile stations use, allowing them to transmit at optimized power levels that balance energy conservation with maintaining sufficient signal quality for reliable communication.
Solution Approach 2:
The system uses feedback from call drop detection to adjust the target FER, which in turn provides feedback to mobile stations about appropriate transmit power levels. This creates a feedback loop where the base station monitors system performance and adjusts parameters to ensure mobile stations transmit at power levels that maintain signal quality while conserving energy.
3Object-generated harmful factors
If the target FER is increased for all mobile stations, then overall system noise is reduced, but individual call quality may deteriorate leading to increased call drops
Solution Approach 1:
The patent applies partial action by selectively applying target FER adjustments rather than uniformly to all mobile stations. Instead of excessively increasing the target FER for everyone (which would cause call drops), the system carefully controls and limits the target FER increase to partial levels that achieve noise reduction without exceeding the threshold that would cause individual call quality deterioration and subsequent call drops.
Data Source
AI summary
Disclosed herein is a method and system to help manage transmission power for wireless communications. A radio access network (RAN) will artificially increase target frame error rate (FER) for certain mobile stations in a coverage area for just a portion of a defined call drop timer period, and the RAN will automatically revert to apply a baseline target FER for a duration sufficient to allow recovery of the mobile station's communications before expiration of the call drop timer period. By increasing the target FER for the mobile stations, noise on the air interface can be reduced. And by reverting the target FER to its baseline level for a sufficient duration, call drops resulting from the increased target FER can be avoided.