Adaptive LPWAN Forward Error Correction for Packet Loss
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
LPWANs lack defined Forward Error Correction (FEC) or Hybrid Automatic Repeat Request (HARQ) mechanisms, leading to compromised data reliability and inefficient energy usage due to reliance on acknowledgments (ARQ) for error recovery.
Innovation Solution
Adaptive Forward Error Correction (FEC) mechanisms that dynamically adjust FEC levels based on data loss conditions, using machine learning to balance computational resource conservation and loss correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional FEC or HARQ mechanisms are implemented in SCHC protocol, then data reliability is improved, but computational cost increases and energy savings are degraded
Solution Approach 1:
The patent implements adaptive FEC that dynamically adjusts the level of forward error correction based on real-time channel conditions and data loss patterns. The system transitions from static SCHC protocol to a dynamic mechanism where FEC strength varies according to observed transmission reliability, allowing the system to use stronger correction only when necessary and conserve energy when channel conditions are good
Solution Approach 2:
The patent changes the parameter of FEC strength from a fixed value to an adaptive variable. By monitoring data loss and adjusting FEC parameters dynamically, the system optimizes the balance between reliability improvement and energy consumption, applying stronger error correction only when channel conditions deteriorate
2Reliability
If FEC mechanisms are implemented to correct data loss, then reliability is improved, but computational complexity increases
Solution Approach 1:
The adaptive FEC mechanism dynamically adjusts computational effort based on observed data loss patterns. When channel conditions are stable and data loss is minimal, the system uses minimal or no FEC processing. When data loss increases, the system activates stronger FEC mechanisms, creating a dynamic response that matches actual needs rather than applying constant computational overhead
3Reliability
If ARQ mechanisms are used for error recovery, then data reliability is maintained, but transmission efficiency decreases due to retransmissions
Solution Approach 1:
The patent applies forward error correction as a preliminary action that proactively adds redundancy to transmitted data before potential loss occurs. This allows the receiver to correct errors autonomously without needing to request retransmissions, thereby maintaining reliability while avoiding the efficiency penalty of ARQ retransmission cycles
Solution Approach 2:
The FEC mechanism acts as an intermediary between transmitter and receiver, providing error correction capability that eliminates the need for interactive ARQ protocols. The redundancy information serves as a mediator that enables autonomous error recovery at the receiver end, improving transmission efficiency by removing the back-and-forth retransmission overhead
Data Source
AI summary
In one embodiment, techniques for adaptive forward error correction (FEC) in Low-Power Wide Area Networks (LPWANS) are disclosed. The techniques may include determining, by a process, for a block of messages transmitted through a computer network with forward error correction, whether any unrecovered data loss occurred during transmission; increasing, by the process, a level of forward error correction used to transmit through the computer network in response to unrecovered data loss; and/or decreasing, by the process, the level of forward error correction used to transmit through the computer network in response to no unrecovered data loss.