Interleaver Parameter Adaptation for Periodic Channel Blockages
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Solution Overview
Problem
Communication systems face challenges in maintaining throughput due to periodic blockages, such as those caused by a helicopter's rotor, which lead to corrupted data and inefficient error correction processes.
Innovation Solution
The implementation of an Upper Layer Protocol Enhancement (ULPE) system that dynamically adjusts communication parameters based on blockage duration and interval, allowing for autonomous configuration and adaptation to optimize throughput by adjusting code rates and interleaver parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If error correction or retransmission is used for corrupted data blocked by the rotor, then data integrity is maintained, but communication throughput decreases due to time consumption and unnecessary use of bandwidth and processing power
Solution Approach 1:
The system performs preliminary actions by predicting periodic blockages based on rotor rotation patterns and proactively adjusting communication parameters (code rate, interleaver depth) before blockages occur. This prevents data corruption rather than correcting it afterward, eliminating the need for retransmission and maintaining high throughput while ensuring data integrity
Solution Approach 2:
The system dynamically changes communication parameters (code rate, interleaver depth, transmission power) in response to detected blockage patterns. By adjusting these parameters, the system optimizes the balance between error correction capability and data throughput, ensuring reliable communication during blockages while maximizing throughput during clear channel conditions
2Productivity
If manual configuration of ULPE parameters is performed for each aircraft and flight path, then communication performance can be optimized, but system complexity and configuration time increase
Solution Approach 1:
The system implements self-service by autonomously monitoring communication channel conditions, detecting blockage patterns, and automatically adjusting ULPE parameters without manual intervention. The system configures itself based on real-time feedback from the communication environment, eliminating the need for manual configuration while maintaining optimized performance
Solution Approach 2:
The system uses feedback mechanisms to continuously monitor communication quality and blockage patterns. Based on this feedback, the system automatically adjusts parameters to optimize performance. This closed-loop control enables the system to adapt to different aircraft and flight paths without manual reconfiguration
3Reliability
If ULPE parameters are set for the worst-case communication interruption, then error correction effectiveness is maintained, but throughput decreases due to overly conservative settings
Solution Approach 1:
The system transitions from static worst-case parameter settings to dynamic parameter adjustment. It continuously adapts code rate, interleaver depth, and other parameters based on actual blockage conditions, using more aggressive settings when the channel is clear and more conservative settings only when blockages are detected, thereby maximizing throughput while maintaining error correction effectiveness
Data Source
AI summary
Methods, systems, and apparatus, including computer programs encoded on computer-storage media, for improving communication throughput despite periodic blockages. In some implementations, a method includes receiving, by a receiver and from a transmitter, code blocks transmitted according to a first set of communication parameters that includes one or more first interleaver parameters used to interleave information in the code blocks prior to transmission. Corrupted portions of at least some of the received code blocks are identified. A blockage duration and a blockage interval of a blockage of communication channel between the transmitter and the receiver are determined based on the corrupted portions of the received code blocks. A second set of communication parameters that includes one or more second interleaver parameters are determined based on the blockage duration and blockage interval. The second set of communication parameters are communicated to the transmitter for subsequent transmissions by the transmitter to the receiver.