LDPC Block Interleaving by Redundancy Version for 5G MTC
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems, particularly in 5G networks, face challenges in achieving high connection density and low latency for massive machine-type communication (MTC) services, which require efficient channel coding and interleaving methods to manage data rate and latency effectively.
Innovation Solution
The implementation of a method and apparatus for performing interleaving using Low-Density Parity-Check (LDPC) codes, specifically through block interleaving of LDPC encoded bits, where bits are written and read in a memory in a resource allocation size corresponding to a symbol unit, and mapped using a quadrature amplitude modulation (QAM) modulation mapper, allowing for independent block interleaving and improved channel coding performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional channel coding and interleaving methods are used in 5G networks, then system complexity is reduced, but channel coding performance and ability to handle high connection density and low latency requirements deteriorate
Solution Approach 1:
The patent applies segmentation by dividing the interleaving process into multiple independent block interleavers, where each block interleaver processes specific LDPC encoded bits independently. This segmentation enables parallel processing of different bit blocks, improving channel coding performance and handling high connection density while managing system complexity through modular architecture
Solution Approach 2:
The patent introduces a new dimension in interleaving by performing block interleaving in a unit of one time transport block based on redundancy version size, rather than traditional sequential processing. This dimensional change in the processing unit enables more efficient resource allocation and latency management for massive MTC services
2Productivity
If independent block interleaving is performed on LDPC encoded bits in a unit of one time transport block based on redundancy version size, then channel coding performance and handling of high connection density improve, but processing complexity and implementation difficulty increase
Solution Approach 1:
The patent segments the LDPC encoded bits into multiple blocks that can be independently interleaved. Each block corresponds to a specific redundancy version, allowing parallel processing and improving data transmission efficiency while keeping individual block processing complexity manageable
Solution Approach 2:
The patent implements dynamic block interleaving where the interleaving parameters and block sizes can be adjusted based on the redundancy version and transmission conditions. This dynamic approach optimizes processing efficiency for different service requirements while adapting complexity to actual needs
3Adaptability or versatility
If LDPC encoded bits are written and read from memory in resource allocation size corresponding to symbol unit, then resource allocation efficiency improves, but memory access complexity increases
Solution Approach 1:
The patent changes the memory access parameters by writing and reading LDPC encoded bits in units corresponding to resource allocation size and symbol units, rather than traditional bit-by-bit access. This parameter change improves resource allocation efficiency by aligning memory operations with resource grid structure, while the regular pattern of access keeps complexity manageable
Data Source
AI summary
A method of performing interleaving, which is performed by a communication apparatus using a low-density parity-check code (LDPC), includes outputting LDPC encoded bits to a block interleaver, and performing block interleaving on the LDPC encoded bits inputted to the block interleaver in a unit of a size of one time transport block based on the a position of redundancy version.