Communication Retransmission Based on QoS Performance
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Solution Overview
Problem
Communication systems face challenges in maintaining expected quality of service due to the tradeoff between communication overhead and error correction capability, particularly in data retransmission schemes where unlimited retransmissions can degrade performance metrics like delay and jitter.
Innovation Solution
A method and system that determine transmission performance relative to expected quality of service to select a maximum number of retransmissions for data packets, employing a communication retransmission scheme limited by this number, and dynamically adjust modulation and coding schemes to optimize retransmissions based on performance metrics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If unlimited retransmissions are allowed to ensure data integrity, then error recovery capability is improved, but delay and jitter increase
Solution Approach 1:
The patent implements dynamic adjustment of the maximum retransmission counter based on channel conditions and QoS requirements. The counter is not fixed but adapts to current transmission performance, allowing the system to optimize between reliability and timeliness in real-time. This resolves the contradiction by making the retransmission limit flexible rather than static.
Solution Approach 2:
The system changes the parameter of maximum retransmission count based on transmission performance metrics and QoS requirements. By adjusting this parameter dynamically, the system can prioritize either data integrity or delay performance depending on current conditions, thus resolving the fundamental tradeoff between these two opposing requirements.
2Reliability
If error correction data is added to every data packet to improve error recovery, then data integrity is improved, but communication overhead increases
Solution Approach 1:
Instead of applying error correction to every packet, the system applies it selectively based on the maximum retransmission counter and channel conditions. This partial application of error correction reduces overhead while maintaining adequate error recovery capability for packets that truly need it.
Solution Approach 2:
The system dynamically adjusts whether to include error correction data in retransmitted packets based on the current value of the maximum retransmission counter and channel conditions. This dynamic approach optimizes the balance between error correction capability and communication overhead.
3Reliability
If retransmission counter is not limited to maintain data integrity, then error recovery is improved, but quality of service degradation occurs
Solution Approach 1:
The system uses feedback from transmission performance monitoring to dynamically adjust the maximum retransmission counter. By continuously monitoring whether QoS requirements are being met and adjusting the counter accordingly, the system ensures that data integrity efforts do not degrade overall service quality.
Solution Approach 2:
The maximum retransmission counter parameter is changed based on QoS requirements and transmission performance. This parameter adjustment allows the system to prevent QoS degradation while maintaining adequate error recovery, resolving the contradiction between these two objectives.
Data Source
AI summary
A method of communication retransmission based on performance relative to an expected quality of service is presented. In the method, data packets associated with the expected quality of service are transmitted. The transmission performance associated with the transmission of the data packets is determined in relation to the expected quality of service. A maximum number of retransmissions for one of the data packets to be transmitted is selected based on the transmission performance. The one of the data packets is transmitted using the communication retransmission scheme limited by the selected maximum number of retransmissions.