CSI Calculation Using Spatial Filter for Multi-TRP Overhead Reduction
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Solution Overview
Problem
Current wireless communication networks face challenges in applying channel state information feedback across various network configurations, particularly in coordinating scheduling for multi-panel, multi-TRP, and multi-beam downlink transmissions, leading to increased overhead and interference between different DL transmissions.
Innovation Solution
The method involves a UE receiving channel state information reference signals for channel measurement and non-zero-power CSI-RS resources for interference measurement, using a receiving spatial filter to calculate CSI, and transmitting this information, with the spatial filter determined based on quasi-colocation information for efficient CSI feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If channel state information feedback is used for coordinated scheduling in multi-TRP, multi-panel, and multi-beam downlink transmissions, then the efficiency of DL transmissions is improved, but the overhead and interference between different DL transmissions increase
Solution Approach 1:
The patent applies universality by using a single receiving spatial filter for multiple purposes: it measures both the channel state information for the desired signal and the interference from other DL transmissions. This multi-functional approach eliminates the need for separate measurement mechanisms, thereby reducing overhead while maintaining the ability to perform coordinated scheduling across multi-TRP, multi-panel, and multi-beam scenarios.
Solution Approach 2:
The patent merges the channel measurement and interference measurement functions into a single CSI-RS resource configuration. By combining these measurements using the same receiving spatial filter, the system reduces the number of separate CSI reporting configurations needed, thereby reducing overhead while still enabling effective coordinated scheduling and interference management.
2Measurement precision
If multiple CSI reporting configurations are used for channel and interference measurement, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by designing a single CSI-RS resource that serves multiple measurement functions simultaneously. The same CSI-RS resource is used for both channel measurement and interference measurement, eliminating the need for multiple separate CSI reporting configurations. This reduces device complexity while maintaining measurement precision through the use of a unified receiving spatial filter.
3Measurement precision
If separate transmission resources are used for channel measurement and interference measurement, then measurement precision is improved, but the number of required resources increases
Solution Approach 1:
The patent merges channel measurement and interference measurement into a single CSI-RS resource configuration. By combining these functions in one resource, the system reduces the total number of CSI-RS resources required while maintaining measurement precision through the use of a unified receiving spatial filter that can distinguish between desired signal and interference components.
Data Source
AI summary
Apparatuses, methods, and systems are disclosed for channel state information calculation. One method includes receiving, using a receiving spatial filter, information indicating at least one channel state information reference signal resource transmitted from a first transmission resource and at least one non-zero-power channel state information reference signal resource for interference measurement transmitted from a second transmission resource. The method includes determining a channel state information reference signal resource of the at least one channel state information reference signal resource and a non-zero-power channel state information reference signal resource of the at least one non-zero-power channel state information reference signal resource for calculating channel state information. The method includes calculating the channel state information based on the channel state information reference signal resource and the non-zero-power channel state information reference signal resource. The method includes transmitting the channel state information.