Coded Block Set Transmission for Wireless Data Reliability
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Solution Overview
Problem
Existing data communication methods in wireless access systems, particularly at cell boundaries, face inefficiencies and delays due to unnecessary resource usage and error handling, leading to poor communication quality and reliability.
Innovation Solution
The implementation of a data communication method using random linear coding and decoding, where coded blocks are transmitted to multiple base stations, allowing for efficient error handling and resource management by sharing data information between base stations without explicit re-transmission requests from the receiving side.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ARQ scheme is used for data re-transmission, then data transmission reliability is improved, but transmission delay increases and wireless resources are wasted
Solution Approach 1:
The patent applies preliminary action by pre-transmitting redundant coded blocks along with the original data blocks. These redundant blocks are generated in advance using systematic coding schemes (such as erasure codes or Reed-Solomon codes) so that when data loss occurs, the receiver can immediately reconstruct the lost data using the pre-sent redundant blocks without waiting for re-transmission requests, thereby reducing transmission delay while maintaining reliability
Solution Approach 2:
The patent implements beforehand cushioning by incorporating forward error correction (FEC) capabilities through systematic coding. Redundant information is embedded in the transmitted data stream in advance, creating a buffer against potential transmission errors or losses. This cushioning mechanism allows the receiver to tolerate certain levels of data loss without requiring re-transmission, thus reducing delay and improving reliability
2Reliability
If data is transmitted to multiple base stations at cell boundary, then communication reliability is improved, but resource consumption and complexity increase
Solution Approach 1:
The patent applies segmentation by dividing the data transmission task across multiple base stations. Each base station receives a portion of the coded data blocks, and the systematic coding structure allows any sufficient subset of these blocks to reconstruct the original data. This segmentation distributes the complexity burden across multiple nodes while improving reliability through diversity
Solution Approach 2:
The patent implements universality by designing a coding scheme that is universally applicable regardless of which specific base stations successfully receive the data. The systematic coding structure ensures that the same set of coded blocks can be used to reconstruct the original data whether received from one base station, multiple base stations, or a combination thereof, simplifying the overall system architecture while maintaining reliability
3Manufacturing precision
If re-transmission requests are implemented for erroneous data, then data accuracy is improved, but communication overhead and delay increase
Solution Approach 1:
The patent applies preliminary action by pre-encoding the data with redundancy information before transmission. This allows the receiver to detect and correct errors locally without needing to request re-transmission, thereby maintaining data accuracy while significantly reducing communication overhead associated with ACK/NACK signals and re-transmission protocols
Data Source
AI summary
A data processing method and a data re-transmission method in a broadband wireless access system are disclosed. A transmitting side generates a coded block set including coded blocks of a predetermined number and the coded blocks are transmitted to first and second base stations. The transmitting side sets a timer after transmitting a last coded block of the coded blocks. The coded blocks received by the second base station are transmitted to the first base station, and the transmitting side receives a control signal indicating whether there is a transmission error from the first base station.