Transport Block Segmentation for Wireless Data Throughput
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Solution Overview
Problem
The increasing number of user equipment (UEs) and data transmission requirements in wireless communication systems pose challenges in efficiently using limited radio resources, particularly in reducing latency and improving data throughput, especially with the introduction of new frequency bands that differ from legacy bands.
Innovation Solution
A method involving a transmitting device that attaches a cyclic redundancy check (CRC) code of specific length to a transport block (TB), segments it into code blocks, and encodes them using low-density parity check (LDPC) codes, with the CRC length depending on the code rate, to efficiently transmit data and control information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of user equipment (UEs) and data transmission requirements increase, then data throughput needs to increase, but radio resources become more limited and harder to manage efficiently
Solution Approach 1:
The transport block is segmented into multiple code blocks, and each code block is further divided into sub-code blocks for parallel processing. This segmentation enables more efficient utilization of radio resources by allowing simultaneous encoding and transmission of multiple smaller blocks, thereby increasing data throughput without requiring additional radio resources.
Solution Approach 2:
The patent applies different code rates to different code blocks based on channel conditions and priority requirements. By dynamically adjusting the code rate parameter for each code block, the system optimizes the balance between data throughput and resource efficiency, allowing higher throughput for critical data while conserving resources for less urgent transmissions.
2Loss of time
If latency needs to be reduced for time-sensitive applications, then transmission speed must increase, but this may compromise transmission reliability
Solution Approach 1:
By segmenting the transport block into multiple code blocks that can be transmitted and acknowledged independently, the system reduces overall latency. If some code blocks are received successfully, they can be processed immediately without waiting for the entire transport block, thereby reducing time loss while maintaining reliability through selective retransmission of only failed blocks.
Solution Approach 2:
The patent implements dynamic code rate adjustment for different code blocks based on channel conditions and priority. Time-sensitive data can be transmitted with lower code rates for higher reliability, while less time-critical data can use higher code rates for faster transmission, dynamically balancing latency and reliability requirements.
3Productivity
If new frequency bands are introduced to increase capacity, then data transmission capability improves, but compatibility with legacy systems becomes more difficult
Solution Approach 1:
The patent employs universal LDPC encoding schemes that can operate across different frequency bands and system configurations. The segmentation and parallel processing architecture is band-agnostic, allowing the same encoding framework to function on both legacy and new frequency bands, thereby maintaining compatibility while enabling enhanced data transmission capability on newer bands.
Solution Approach 2:
The system adjusts encoding parameters such as code rate and block size to match the characteristics of different frequency bands. This parameter adaptation allows the same LDPC encoding framework to optimize performance for both legacy and new frequency bands, maintaining compatibility while leveraging the specific advantages of each band for improved data transmission capability.
Data Source
AI summary
A transmission device in a wireless communication system attaches a cyclic redundancy check (CRC) code having a predetermined length to a code block (CB) acquired from a transport block (TB). The predetermined length according to the present invention depends on a code rate associated with the TB.