Adaptive Interleaver Control 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) that dynamically adjusts communication parameters based on the duration and interval of blockages, 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 bandwidth usage
Solution Approach 1:
The system performs preliminary actions by predicting rotor blockage events based on helicopter rotational information before they occur. This allows the communication system to proactively adjust parameters such as code rate and interleaver depth in advance, preventing data corruption rather than reacting to it afterward, thereby maintaining throughput while ensuring reliability
Solution Approach 2:
The system dynamically adjusts communication parameters (code rate, interleaver depth, modulation scheme) in real-time based on the predicted severity and timing of rotor blockages. This dynamic adaptation allows the system to optimize the balance between reliability and throughput by using more robust parameters only when and where blockages are expected
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 operational burden increase
Solution Approach 1:
The system implements self-service by autonomously determining ULPE parameters based on flight data and predicted blockage characteristics. The communication system automatically configures code rate, interleaver depth, and other parameters without requiring manual intervention from operators, thereby maintaining optimized performance while reducing operational complexity
Solution Approach 2:
The system uses feedback from actual communication performance and blockage patterns to continuously refine parameter selections. By monitoring throughput, error rates, and blockage characteristics, the system learns and adapts its parameter configuration strategy, eliminating the need for manual reconfiguration for different flight paths
3Reliability
If ULPE parameters are set for the worst-case communication interruption, then reliability is maintained, but throughput decreases due to overly conservative parameters
Solution Approach 1:
The system applies local quality by determining ULPE parameters specific to each predicted blockage event rather than using uniform worst-case parameters throughout. By analyzing the specific characteristics of anticipated blockages (duration, timing, severity), the system configures appropriate error correction strength locally, using stronger parameters only when needed and weaker parameters otherwise to maximize throughput
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.