Wireless Data Transmission via CDM Group Segmentation
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Solution Overview
Problem
Current wireless communication systems face challenges in reliably transmitting and receiving data in network cooperative communication scenarios, particularly in 5G systems, where ensuring high data transfer rates and low latency are crucial for IoT applications, and existing methods do not effectively address the need for efficient resource management and control across different service types like eMBB, mMTC, and URLLC.
Innovation Solution
The method involves a terminal in a wireless communication system that receives downlink control information (DCI) from transmission and reception points (TRPs), identifies whether each TRP repeatedly transmits the same data via a physical downlink shared channel (PDSCH) based on code division multiplex (CDM) group information, and controls data reception accordingly, enhancing communication reliability through repetitive transmission configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple TRPs transmit data simultaneously to improve data transfer rate, then productivity increases, but interference between transmissions increases
Solution Approach 1:
The patent segments the data transmission by dividing it into multiple code division multiplex (CDM) groups, where each group is transmitted by different transmission and reception points (TRPs). This segmentation allows simultaneous transmission from multiple TRPs while reducing interference through orthogonal code separation, directly resolving the contradiction between improving data transfer rate and reducing transmission interference.
2Reliability
If repetitive transmission is used to improve reliability, then reliability increases, but transmission time increases
Solution Approach 1:
The patent merges multiple repetitive transmissions from different TRPs into simultaneous transmissions using code division multiplexing. Instead of sequential repetitive transmissions that would increase time, the system combines multiple TRP transmissions in the same time-frequency resources using orthogonal codes, achieving both high reliability through diversity and low latency through parallel transmission.
3Speed
If coordinated transmission between multiple TRPs is implemented to reduce latency, then speed increases, but system complexity increases
Solution Approach 1:
The patent implements a universal control mechanism where a single downlink control information (DCI) message from the physical downlink control channel (PDCCH) coordinates multiple TRPs. This multi-functional approach allows one control message to simultaneously manage transmission parameters, CDM group assignments, and resource allocation for multiple TRPs, reducing control overhead and system complexity while enabling low-latency coordinated transmission.
Data Source
AI summary
A method of a terminal in a wireless communication system is provided. The method includes receiving, from at least one of transmission and reception points (TRPs), downlink control information (DCI) including first information on transmission configuration indication (TCI) states and second information for antenna ports, identifying whether each of the TRPs repeatedly transmits same data via a physical downlink shared channel (PDSCH) based on a number of code division multiplex (CDM) group indicated by the second information for antenna ports, and receiving data from the TRPs based on a result of the identifying.