CSI-RS Transmission in LTE-Advanced Subframes
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Solution Overview
Problem
The existing LTE-Advanced system lacks a specific design for CSI-RS transmission, leading to conflicts with control and system information, and inefficient use of downlink subframes, which degrades throughput performance and increases implementation complexity.
Innovation Solution
A CSI-RS transmission method that transmits CSI-RS in specific downlink subframes, such as subframe 4 and 9, avoiding special subframes and conflicts with control and system information, and configuring transmission cycles to minimize overhead and simplify scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If CSI-RS is transmitted in downlink subframes without specific subframe selection, then the transmission flexibility is improved, but conflicts with control and system information occur and implementation complexity increases
Solution Approach 1:
The patent applies local quality by designating specific subframes (e.g., subframe 4 and subframe 9) for CSI-RS transmission, creating localized transmission opportunities with defined properties. This resolves the contradiction by providing structured flexibility - the system maintains adaptability through configurable subframe selection while reducing implementation complexity through clear, predetermined transmission patterns that avoid conflicts with control and system information.
2Measurement precision
If CSI-RS transmission cycle is shortened to increase measurement frequency, then the channel state information accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent implements periodic action by establishing configurable transmission cycles for CSI-RS (e.g., 5ms, 10ms, or other periods). This allows the system to achieve accurate channel state information through regular periodic measurements while controlling signaling overhead by optimizing the cycle length based on channel conditions and system requirements, resolving the contradiction between measurement frequency and overhead.
Data Source
AI summary
Disclosed in embodiments of the present invention are a CSI-RS transmission method, an inspection method and a device thereof. The transmission method comprises: transmitting a CSI-RS via any downlink subframe other than a special subframe, a downlink subframe transmitting a control message, or a downlink subframe transmitting a system message. Embodiments of the present invention enable the CSI-RS to be prevented from conflicting with the control message, the system message, and a message carried by the special subframe.