Wireless Backhaul FEC Control for Delay-Sensitive Data
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Solution Overview
Problem
In wireless communication systems, using a wireless backhaul line leads to poor communication quality and increased communication delay due to higher packet error rates, which are exacerbated by error correction methods like FEC, making it difficult to maintain both quality and delay requirements.
Innovation Solution
A wireless communication apparatus that determines whether to add redundant data based on allowable delay time, using a processor to classify packets and adjust transmission accordingly, prioritizing radio resources and transmission schemes to optimize communication quality and delay in heterogeneous networks with mixed wireless standards and cell radii.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If error correction methods like FEC are applied to improve communication quality over wireless backhaul lines, then communication reliability is improved, but communication delay increases
Solution Approach 1:
The patent dynamically changes the FEC coding rate parameter based on channel conditions and traffic requirements. By adjusting the coding rate (e.g., from 1/2 to 3/4), the system can achieve better error protection when needed while minimizing overhead and delay when channel conditions are good, thus resolving the contradiction between reliability and delay
Solution Approach 2:
The system implements dynamic adaptation of error correction strategies based on real-time channel quality indicators and traffic characteristics. The FEC application is not static but dynamically adjusted, allowing the system to switch between aggressive error correction (for poor channels) and minimal correction (for good channels), balancing reliability and delay requirements
2Reliability
If redundant data is added to all packets to ensure communication quality, then reliability is improved, but transmission efficiency decreases
Solution Approach 1:
Instead of applying uniform error correction to all packets, the patent applies error correction selectively based on local characteristics of each packet or traffic flow. Critical packets (e.g., control signals, real-time data) receive stronger FEC protection, while less critical packets use minimal or no redundancy, thus improving reliability where needed without sacrificing overall transmission efficiency
Solution Approach 2:
The system applies partial error correction only to the extent necessary for each traffic type rather than excessive correction to all data. This partial action approach ensures sufficient reliability for critical communications while avoiding the performance penalty of applying full error correction universally, thereby maintaining transmission efficiency
3Loss of time
If priority control schemes are used to reduce delay, then communication delay is reduced, but communication quality deteriorates due to higher packet error rates
Solution Approach 1:
The patent dynamically adjusts the FEC coding rate parameter based on channel conditions and traffic requirements. By adjusting the coding rate (e.g., from 1/2 to 3/4), the system can achieve better error protection when needed while minimizing overhead and delay when channel conditions are good, thus resolving the contradiction between reliability and delay
Solution Approach 2:
The system implements dynamic adaptation of error correction strategies based on real-time channel quality indicators and traffic characteristics. The FEC application is not static but dynamically adjusted, allowing the system to switch between aggressive error correction (for poor channels) and minimal correction (for good channels), balancing reliability and delay requirements
Data Source
AI summary
Provided is a wireless communication apparatus capable of improving communication quality and reducing a communication time delay in a case of communicating data over a backhaul line. The wireless communication apparatus is a wireless communication apparatus which communicates with another wireless communication apparatus over a wireless backhaul line in which a plurality of wireless communication schemes are mixed and used, and includes a processor that determines whether or not to add redundant data to data, in accordance with an allowable delay time of the data, and an antenna that transmits the data by adding or not adding the redundant data to the data, in accordance with a result of the determination.