Wireless Codeword Layer Mapping for Multi-TRP Reliability
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Solution Overview
Problem
Current wireless communication systems face challenges in supporting high data traffic, increased data rates, and low latency while maintaining energy efficiency, particularly in next-generation mobile communication systems that require advanced technologies like dual connectivity, massive MIMO, and non-orthogonal multiple access.
Innovation Solution
A method for transmitting and receiving data using multiple transmission reception points (TRPs) that involves codeword to layer mapping, where a single codeword can be mapped to 5 or more layers, and multiple codewords can be mapped to 4 or less layers, with the use of a new DMRS table and encoding HARQ-ACK information to enhance reliability and resource allocation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple transmission reception points (TRPs) are used to enhance reliability and support high data traffic, then data transmission capability and reliability are improved, but system complexity and resource allocation difficulty increase
Solution Approach 1:
The patent segments the data transmission process by introducing separate codewords (first codeword and second codeword) that can be independently mapped to different layers and transmitted through multiple TRPs. This segmentation allows each codeword to be handled separately in terms of mapping and transmission, reducing the complexity of managing multiple simultaneous transmissions while maintaining high reliability through diversity gain.
Solution Approach 2:
The patent introduces a new dimension in codeword-to-layer mapping by allowing flexible mapping configurations where a single codeword can be mapped to 5 or more layers, or multiple codewords can be mapped to 4 or less layers. This dimensional flexibility enables the system to adapt to different transmission scenarios and TRP configurations without increasing operational complexity.
2Productivity
If codeword to layer mapping is optimized for multiple TRPs, then transmission efficiency is improved, but the complexity of defining mapping rules and DMRS tables increases
Solution Approach 1:
The patent creates a universal codeword-to-layer mapping framework that can handle multiple scenarios: single codeword transmission in 5 or more layers, multiple codeword transmission in 4 or less layers, and various TRP configurations. This multi-functional mapping approach eliminates the need for separate mapping rules for each scenario, reducing overall system complexity while maintaining high transmission efficiency across different configurations.
3Measurement precision
If HARQ-ACK information is encoded for multiple codewords, then feedback accuracy is improved, but the number of feedback bits required increases
Solution Approach 1:
The patent merges the HARQ-ACK feedback for multiple codewords into a unified feedback structure. By combining the acknowledgment information for the first codeword and second codeword in a single feedback message, the system achieves accurate feedback for multiple transmissions without requiring separate feedback bits for each codeword, thus reducing the total feedback bit quantity while maintaining feedback accuracy.
Data Source
AI summary
The present invention provides a method for transmitting or receiving data in a wireless communication system, and an apparatus therefor. Specifically, a method for receiving data by a user equipment (UE) in a wireless communication system may comprise the steps of: receiving control information related to a first codeword and a second codeword; and on the basis of the control information, receiving the first codeword and the second codeword via a physical layer, wherein it is recognized on the basis of a pre-defined rule that the first codeword and the second codeword correspond to the same transport block within a higher layer of the physical layer.