CSI-RS Resource Management for Carrier Aggregation
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently performing channel measurement, particularly in multi-node systems with carrier aggregation and coordinated Multi-point transmission and reception, where channel state information-reference signal (CSI-RS) measurements across multiple component carriers require optimized management to ensure accurate data throughput and signal quality.
Innovation Solution
A method for channel measurement in user equipment (UE) that involves receiving CSI-RS resource set information, measuring received power for each component carrier, and transmitting this data to the serving evolved NodeB (eNB), with specific configurations for activation/deactivation states of secondary cells and differentiated measurement periods for intra-frequency and inter-frequency measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If CSI-RS measurements are performed across multiple component carriers in carrier aggregation systems, then data throughput and signal quality are improved, but measurement complexity and resource management difficulty increase
Solution Approach 1:
The patent divides the measurement process into separate procedures for different component carriers (CCs). The CRMS configuration is applied independently to each CC, allowing the UE to measure and report CSI-RS resources on a per-CC basis. This segmentation reduces the overall measurement complexity by breaking down the multi-CC measurement task into manageable individual CC measurements, while still achieving the benefit of aggregated data throughput.
2Measurement precision
If independent CRMS configuration is applied to each component carrier, then measurement accuracy and signal quality are improved, but resource management overhead increases
Solution Approach 1:
The patent implements a universal CRMS configuration mechanism that can be applied across multiple component carriers. The same CRMS configuration parameters (such as measurement bandwidth, resource sets, and reporting formats) are reused for each CC, reducing resource management overhead. This universal approach maintains measurement accuracy by ensuring consistent measurement procedures across all CCs while avoiding the need to create entirely separate configurations for each carrier.
3Reliability
If multiple nodes perform coordinated communication using dispersed antennas, then signal to interference-plus-noise ratio (SINR) and transmission capacity are improved, but system configuration and channel measurement difficulty increase
Solution Approach 1:
The patent introduces the CRMS configuration as an intermediary mechanism that simplifies channel measurement in multi-node coordinated communication systems. The CRMS provides a standardized framework for configuring CSI-RS resources across multiple nodes and dispersed antennas, making the measurement process more manageable. This intermediary configuration layer translates the complex physical multi-node environment into a structured measurement framework, reducing the difficulty of detecting and measuring channels while maintaining the SINR benefits of coordinated communication.
Data Source
AI summary
A method and apparatus for performing channel measurement in a wireless communication system are disclosed. A method for performing channel measurement by a user equipment (UE) in a wireless communication system supporting carrier aggregation (CA) and coordinated Multi-point transmission and reception (CoMP) includes: receiving information on a channel state information—reference signal (CSI-RS) resource set (hereinafter referred to as CRMS (CoMP resource management set)) for measuring CSI-RS—based received power from serving evolved NodeB (eNB); measuring a received power for the CSI-RS resources contained in the CRMS; and transmitting the measured received power to the serving eNB, wherein the CRMS is independently configured for each of the plurality of component carriers (CCs) capable of being aggregated in the carrier aggregation (CA).