Dynamic Packet Discard Threshold for Wireless Data Transmission
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Solution Overview
Problem
Existing methods for presetting packet discard thresholds in wireless communication systems are inadequate, leading to increased packet loss rates and degraded transmission efficiency due to premature discarding of valid data packets and inability to adapt to varying channel conditions.
Innovation Solution
A data processing method that dynamically determines the sum of predicated transmission time and stay time in the buffer for each data packet, discarding it only when this sum exceeds the preset air interface delay, allowing for flexible control based on actual network conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a relatively small packet discard threshold is preset, then transmission efficiency is improved, but packet loss rate increases
Solution Approach 1:
The patent applies dynamics by making the packet discard threshold adaptive rather than fixed. The threshold is dynamically adjusted based on real-time channel quality indicators (CQI) and historical transmission statistics. When channel conditions are good, the threshold is relaxed to reduce packet loss; when conditions deteriorate, the threshold is tightened to maintain transmission efficiency. This dynamic adaptation resolves the contradiction between transmission efficiency and packet loss rate.
Solution Approach 2:
The patent changes the parameter of packet discard threshold from a static value to a variable that adapts based on channel conditions. By monitoring CQI values and adjusting the threshold accordingly, the system optimizes the balance between transmission efficiency and packet loss rate. The threshold parameter is modified based on statistical analysis of transmission outcomes and current channel state, allowing the system to respond to changing conditions.
2Reliability
If a relatively large packet discard threshold is preset, then packet loss rate is reduced, but transmission efficiency degrades
Solution Approach 1:
The system dynamically adjusts the packet discard threshold based on real-time channel conditions rather than using a fixed large threshold. When channel quality is poor, the threshold is automatically reduced to prevent excessive waiting and maintain transmission efficiency. This dynamic behavior allows the system to reduce packet loss rate during good conditions while preserving efficiency during poor conditions.
Solution Approach 2:
The packet discard threshold parameter is changed from a constant value to an adaptive parameter that varies with channel conditions. The system monitors transmission statistics and CQI values to adjust the threshold parameter, ensuring it is large enough to reduce packet loss but not so large as to degrade transmission efficiency under varying channel conditions.
3Reliability
If the packet discard threshold is determined by reserving time for the largest number of transmissions, then system reliability is improved, but transmission efficiency decreases
Solution Approach 1:
The patent changes the method of determining the packet discard threshold from a worst-case static calculation to a dynamic parameter adjustment based on actual channel conditions. Instead of reserving time for the maximum number of transmissions regardless of reality, the system adjusts the threshold parameter based on observed CQI values and transmission success rates, achieving both reliability and efficiency.
Solution Approach 2:
The system implements feedback mechanisms by monitoring transmission outcomes and channel quality indicators, then using this information to adjust the packet discard threshold. The feedback loop allows the system to learn from actual transmission performance and optimize the threshold parameter, avoiding the overly conservative approach of reserving time for the largest number of transmissions while maintaining system reliability.
Data Source
AI summary
A method for data processing is provided, the method comprises: determining the predicted transmission time required by the data packet to be transmitted currently during the transmission course and the residence time for the data packet residing in the buffer; when the sum of the predicted transmission time and the residence time is greater than the predetermined air interface time delay, discarding the data packet. By utilizing the technical scheme of the invention, the discarding time of the data packet is dynamically adjusted, the packet discarding rate is reduced, and the service quality is improved. An apparatus for data processing is also provided.