CSI Reporting Segmentation for 5G Cooperative Communication
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Solution Overview
Problem
Current 5G communication systems face challenges in acquiring accurate channel state information (CSI) for efficient uplink and downlink operations, particularly in network cooperative communication scenarios, where existing methods result in higher overhead and less precise CSI reporting.
Innovation Solution
A method and apparatus are introduced where a terminal and base station exchange specific resources for channel measurement and interference measurement, allowing for the identification and reporting of CSI using these resources, thereby enhancing the accuracy and reducing overhead in CSI acquisition and reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If network cooperative communication is implemented, then system capacity and coverage are improved, but channel state information acquisition overhead increases
Solution Approach 1:
The patent segments the CSI reporting process by introducing separate first CSI and second CSI reports. The first CSI is reported on the Physical Uplink Control Channel (PUCCH) while the second CSI is reported on the Physical Uplink Shared Channel (PUSCH). This segmentation allows different types of channel state information to be reported through different channels with different overhead characteristics, thereby managing the overall reporting overhead while maintaining system capacity.
Solution Approach 2:
The patent adds a dimensional distinction by reporting CSI for different transmission reception points (TRPs) through different uplink channels. The first CSI corresponding to a first TRP is reported via PUCCH, while the second CSI corresponding to a second TRP is reported via PUSCH. This dimensional separation in the reporting domain enables the system to handle cooperative communication from multiple TRPs without proportionally increasing overhead on a single channel.
2Productivity
If network cooperative communication is implemented, then system capacity and coverage are improved, but measurement and reporting complexity increases
Solution Approach 1:
The patent divides the CSI measurement and reporting tasks into separate segments corresponding to different transmission reception points (TRPs). The terminal performs channel measurement and interference measurement separately for the first TRP and second TRP, generating first CSI and second CSI respectively. This segmentation of measurement and reporting processes reduces the complexity of handling cooperative communication by treating each TRP's CSI independently through dedicated reporting channels.
Solution Approach 2:
The patent introduces different uplink channels (PUCCH and PUSCH) as intermediaries between the terminal and the network for reporting different types of CSI. The first CSI is transmitted through PUCCH while the second CSI is transmitted through PUSCH. These intermediary channels provide structured pathways that simplify the reporting process by establishing clear, separate communication routes for different CSI types, thereby reducing overall reporting complexity.
Data Source
AI summary
A communication scheme and a system thereof for converging internet of things (IoT) technology and a 5th generation (5G) communication system for supporting a higher data transmission rate beyond that of a 4th generation (4G) system are provided. The disclosure can be applied to intelligent services (for example, services related to smart homes, smart buildings, smart cities, smart cars, connected cars, health care, digital education, retail business, security, and safety) based on the 5G communication technology and the IoT-related technology. The disclosure proposes a method and an apparatus for transmitting and receiving a reference signal to efficiently use resources in a wireless communication system.