PBCH Polar Bit Allocation for Faster Decoding in SSB Transmission
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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 decoding speed for Polar codes used in channel coding.
Innovation Solution
A method for transmitting and receiving a physical broadcast channel (PBCH) using a Polar code of size N=512, where specific information bits are mapped to optimized bit positions within the Polar code, including half-frame information and synchronization signal block (SSB) index information, to enhance communication efficiency and decoding speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Polar codes are used for channel coding to improve reliability, then block error rate performance is improved, but decoding speed deteriorates due to the large code size
Solution Approach 1:
The PBCH information is segmented into specific bit positions (247 for half-frame information, 253-255 for SSB index information) within the Polar code structure. This segmentation allows targeted optimization of decoding operations for critical information fields, improving overall decoding speed while maintaining the reliability benefits of Polar codes.
Solution Approach 2:
Different bit positions within the Polar code are assigned different information types based on their importance and decoding requirements. By optimizing the mapping of specific information fields to specific bit positions, the patent achieves local quality optimization that improves decoding efficiency for critical information while maintaining overall code reliability.
2Productivity
If the number of user equipment and data transmission requirements increase, then communication capacity is improved, but radio resource efficiency deteriorates
Solution Approach 1:
The optimized Polar code mapping structure serves multiple functions simultaneously: it encodes half-frame information, SSB index information, and other PBCH data within a unified framework. This multi-functionality allows the system to support increasing numbers of UEs and data requirements while maintaining radio resource efficiency through a single versatile coding scheme.
Data Source
AI summary
In a wireless communication system, a physical broadcast channel (PBCH) is encoded based on a Polar code and then is transmitted. Half-frame information within the PBCH is mapped to a bit position 247 among bit positions of the Polar code and synchronization signal and PBCH block (SSB) index information within the PBCH is mapped to bit positions 253, 254, and 255 of the Polar code.