LDPC Control Information Encoding with Adaptive Block Puncturing
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently encoding control information, particularly in minimizing transmission errors for L1 and L2 signaling, which is crucial for stable service provision.
Innovation Solution
The method involves dividing control information into multiple Low Density Parity Check (LDPC) blocks, determining the number of blocks based on the total number of bits, calculating input information bits, and determining puncturing bits according to the modulation order, to ensure efficient encoding and decoding of control information using LDPC codes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control information is encoded using conventional methods, then the encoding process is simple, but transmission errors increase and service stability deteriorates
Solution Approach 1:
The control information is divided into multiple LDPC blocks for separate encoding. Each block is encoded independently using LDPC codes, which improves error correction capability while maintaining manageable encoding complexity through modular processing
Solution Approach 2:
The patent applies LDPC encoding with specific parameters (code rates of 1/3, 1/2, or 2/3, and block sizes of 8192 or 16384 bits) to optimize the balance between error correction performance and encoding complexity for control information
2Reliability
If control information is divided into multiple LDPC blocks, then encoding performance improves, but the determination of block number and puncturing bits increases system complexity
Solution Approach 1:
The system dynamically determines the number of LDPC blocks and puncturing bits based on the total bit length of control information and modulation order. This adaptive approach ensures consistent decoding performance across varying conditions while automating the complexity management
Solution Approach 2:
Specific parameter relationships are established: the number of blocks is determined by total bits divided by block size, and puncturing bits are calculated based on modulation order (QPSK: 1/4, 16QAM: 1/8, 64QAM: 1/16). These parameter mappings simplify the decision process while maintaining performance consistency
3Productivity
If puncturing bits are determined according to modulation order, then transmission efficiency improves, but the calculation complexity increases
Solution Approach 1:
The patent establishes fixed relationships between modulation order and puncturing bit ratios (QPSK: 1/4, 16QAM: 1/8, 64QAM: 1/16). This parameter mapping enables efficient transmission adaptation while simplifying calculations through predetermined ratios rather than complex real-time optimization
Data Source
AI summary
A method and apparatus for transmitting control information in a wireless communication system using a Low Density Parity Check (LDPC) code is provided. The number of LDPC blocks, through which L1 post-signaling information is to be transmitted, is determined according to the total number of bits of the L1 post-signaling information. The number of input information bits of each LDPC block is calculated when the determined number of LDPC blocks is plural. The number of puncturing bits among parity bits of each LDPC block is determined considering a modulation order. A frame including one or multiple LDPC blocks generated through the preceding steps is transmitted.