CSI-RS Resource Configuration for Coherent Joint Transmission
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Solution Overview
Problem
In wireless communication systems, configuring CSI-RS resources for coherent joint transmission (CJT) across multiple TRPs is challenging, leading to performance degradation due to insufficient channel estimation and interference measurement accuracy.
Innovation Solution
A method and apparatus for configuring CSI-RS resources by determining a time-frequency pattern based on the number of ports and resources, allowing network devices and terminals to achieve coherent joint transmission (CJT) across multiple TRPs, thereby reducing system performance impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple CSI-RS resources are configured for CJT across multiple TRPs, then channel estimation accuracy and interference measurement accuracy are improved, but resource configuration complexity and system overhead increase
Solution Approach 1:
The patent changes the parameter of CSI-RS resource configuration by introducing a time-frequency pattern parameter that dictates the periodicity and positioning of CSI-RS resources. This allows the system to configure multiple CSI-RS resources for multiple TRPs while managing complexity through standardized parameter sets rather than arbitrary configurations.
Solution Approach 2:
The patent segments the CSI-RS resources by associating each TRP with a specific CSI-RS resource and time-frequency pattern. This segmentation allows independent configuration and measurement for each TRP while maintaining overall system coordination, thereby improving measurement precision without overwhelming complexity.
2Measurement precision
If multiple CSI-RS resources are configured for CJT across multiple TRPs, then interference measurement accuracy is improved, but system overhead and resource consumption increase
Solution Approach 1:
The patent implements periodic action by configuring CSI-RS resources to occur at regular time intervals defined by the time-frequency pattern. This periodic configuration allows the system to obtain interference measurements at multiple time points without continuously consuming resources, thereby improving interference measurement accuracy while controlling resource consumption through efficient periodic sampling.
3Adaptability or versatility
If CSI-RS resources are configured without a defined time-frequency pattern, then configuration flexibility is maintained, but coherent joint transmission performance degrades
Solution Approach 1:
The patent introduces dynamics by allowing the time-frequency pattern parameter to be configurable and adaptable to different transmission scenarios. This enables the system to adjust the periodicity and positioning of CSI-RS resources based on channel conditions and traffic requirements, maintaining configuration flexibility while ensuring reliable CJT performance through optimized resource placement.
Data Source
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AI summary
Disclosed in the embodiments of the present disclosure are methods for configuring channel state information-reference signal (CSI-RS) resources, and apparatuses therefor, which can be applied to a coherent joint transmission (CJT) scenario. A method for configuring CSI-RS resources comprises: a network device determining a configuration time-frequency pattern of a plurality of CSI-RS resources according to the number of ports of each CSI-RS resource and/or the number of CSI-RS resources among the plurality of CSI-RS resources configured for a terminal device, wherein each CSI-RS resource corresponds to a transmission reception point (TRP) used for coherent joint transmission; and the network device configuring the plurality of CSI-RS resources for the terminal device according to the configuration time-frequency pattern. By implementing the embodiments of the present disclosure, a plurality of CSI-RS resources can be more effectively configured for a terminal device, such that coherent joint transmission of each TRP among a plurality of TRPs is realized, and the impact on the system performance is reduced.