TCI-Based CSI Measurement for Multi-TRP Beam Tracking
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Solution Overview
Problem
Existing wireless communication systems face challenges in accurately determining and measuring reference signals in multi-transmission reception point scenarios due to interference and inflexible resource configuration, which affects channel state indication and beam tracking.
Innovation Solution
The method involves configuring transmission configuration indication (TCI) codepoints in physical downlink control channels to determine reference signal measurement information, using codepoint indices to associate channel and interference measurement resources, and employing predefined TCI states for efficient beam management and interference calculation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple transmission reception points are used to improve wireless communication performance, then transmission rate and reliability are improved, but interference between TRPs increases and measurement accuracy deteriorates
Solution Approach 1:
The patent segments the measurement process by introducing separate channel measurement resources and interference measurement resources. Channel measurement is performed using channel measurement reference signals (CMRS) while interference measurement is performed using interference measurement reference signals (IMRS). This segmentation allows independent optimization of each measurement type, improving overall measurement accuracy in multi-TRP environments.
Solution Approach 2:
The patent introduces measurement resource configuration indicators as intermediaries that map TCI codepoints to specific channel and interference measurement resources. These indicators act as mediators between the physical layer signaling and the measurement processes, enabling flexible and accurate resource association without direct interference between measurement types.
2Productivity
If complex processing is performed at terminals to achieve high transmission rate, then throughput is improved, but terminal complexity and processing burden increase
Solution Approach 1:
The patent applies preliminary action by pre-configuring measurement resource sets and TCI state mappings through higher-layer signaling (RRC or MAC CE) before actual measurements are needed. This pre-configuration reduces the real-time processing burden at the terminal, as the complex mapping relationships are established in advance rather than computed dynamically during measurement.
Solution Approach 2:
The patent introduces dynamic adaptability through configurable measurement resource sets that can be flexibly associated with different TCI codepoints. The measurement resource configuration allows dynamic adjustment of measurement parameters and resource associations based on current channel conditions and TRP configurations, optimizing performance while managing complexity.
3Measurement precision
If flexible resource configuration is implemented for beam management, then beam tracking accuracy is improved, but system complexity and configuration overhead increase
Solution Approach 1:
The patent creates universal measurement resource sets that can serve multiple purposes: channel measurement, interference measurement, and beam management. The same measurement resource set can be associated with different TCI codepoints for different TRPs, reducing the need for separate dedicated resources for each function and simplifying overall system configuration.
Data Source
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AI summary
Methods, apparatuses, and systems for determining the measurement of reference signals in a wireless system are described. In one aspect, a wireless communication method is disclosed. The method includes determining measurement reference signal information based on transmission configuration indication (TCI) codepoint information, wherein the TCI codepoint information is indicated in a TCI field in a physical downlink control channel (PDCCH), wherein the reference signal measurement information includes a TCI codepoint index. The method further includes determining a measurement reference signal resource in a measurement reference signal resource set according the TCI codepoint index, and measuring the reference signal.