CSI-RS Configuration for Reducing UE Processing Overhead
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Solution Overview
Problem
Current wireless communication systems, particularly in LTE, face inefficiencies in CSI re-computation processes due to the complexity of managing multiple channel and interference measurement resources, leading to increased processing overhead and complexity for user equipment (UE).
Innovation Solution
The solution involves configuring CSI processes to limit the number of channel and interference measurement resources within a subframe, aligning their periodicity with zero-power CSI-RS resources, and restricting the number of CSI processes to reduce processing burden and CSI re-computation frequency, allowing for more efficient CSI feedback reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple channel and interference measurement resources are configured for CSI processes, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent extracts and separates the measurement resource configuration into distinct zero-power CSI-RS resources that are independently configurable. By taking out the measurement resources as separate entities with independent periodicity configurations, the system achieves precise CSI measurement while reducing the complexity of managing bundled measurement resources.
Solution Approach 2:
The patent segments the CSI measurement process by configuring multiple independent zero-power CSI-RS resources with different periodicities. Each resource can be independently measured and reported, dividing the complex measurement task into manageable segments that reduce overall processing complexity while maintaining measurement precision.
2Reliability
If CSI re-computation frequency is increased, then reliability is improved, but use of energy increases
Solution Approach 1:
The patent implements periodic CSI measurement and reporting based on independently configurable periodicities for each zero-power CSI-RS resource. This periodic action allows the system to maintain reliable CSI feedback by computing CSI only when needed according to configured periodicity, rather than continuously, thereby reducing energy consumption while maintaining feedback reliability.
3Adaptability or versatility
If number of CSI processes is increased, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent creates universal zero-power CSI-RS resources that can serve multiple CSI processes. Each zero-power CSI-RS resource is configured independently and can be reused across different CSI processes, providing adaptability and versatility while reducing the overall number of processes the UE must manage, thereby reducing device complexity.
Data Source
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AI summary
A method of wireless communication includes determining a capability for a number of channel state information configurations supported by a user equipment (UE). The channel state information processes link a channel measurement report with an interference measurement report. The UE transmits the capability to an eNodeB. Additionally, the UE receives CSI process configurations. The CSI process configurations identify CSI processes that can be requested by the eNodeB.