Transmission Symbol Coding for Interference at Power Transitions
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Solution Overview
Problem
In wireless communication systems, synchronization errors between base stations lead to high interference levels, causing loss of symbols during power transitions due to co-channel interference, especially in tight frequency reuse patterns where accurate power sequence synchronization is crucial.
Innovation Solution
Implementing a method to code a stronger error correcting code for a specific number of symbols at the beginning and end of a transmission period, rather than uniformly across the entire period, to mitigate interference and ensure data integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If tight frequency reuse pattern is applied to improve frequency efficiency, then network capacity increases, but co-channel interference and inter-cell interference increase
Solution Approach 1:
The patent applies preliminary action by encoding symbols at the beginning and end of transmission periods with stronger error correcting codes before transmission occurs. This anticipates the high interference periods that will occur during power transitions, preparing the signal in advance to withstand the expected interference and prevent symbol loss.
2Reliability
If power sequence synchronization is required to reduce interference, then signal quality improves, but system complexity and synchronization requirements increase
Solution Approach 1:
The patent applies local quality by differentiating the error correction strength for different portions of the transmission period. Specifically, symbols at the beginning and end of transmission periods (which occur during power transitions and are more susceptible to interference) are encoded with stronger error correcting codes, while middle symbols use standard coding. This localized enhancement protects critical periods without requiring system-wide synchronization changes.
3Reliability
If stronger error correcting code is applied to all symbols, then symbol loss during interference periods decreases, but transmission efficiency decreases
Solution Approach 1:
The patent applies partial action by using stronger error correcting codes only for a specific portion of symbols (those at the beginning and end of transmission periods) rather than all symbols. This selective application provides enhanced protection where it is most needed during high interference periods while maintaining standard coding for other symbols, thus balancing reliability improvement with transmission efficiency.
Data Source
AI summary
An apparatus, a base station and user equipment are provided. The apparatus is configured to code a first given number of symbols from the beginning of a transmission period and/or a second given number of symbols from the end of the transmission period with a stronger error correcting code than the rest of the symbols in the transmission period.