IMR Configuration Indexing for CoMP Interference Measurement
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Solution Overview
Problem
In CoMP systems, efficiently transmitting and receiving interference measurement resource (IMR) configuration information for downlink interference measurement is challenging, as existing methods are not well-suited for transmitting two or more CSI-RS and IMR configuration information to user equipment in a downlink CoMP environment, leading to interference and suboptimal channel state information feedback.
Innovation Solution
A method and apparatus for transmitting IMR configuration information using an interference measurement resource index, where the transmission point determines and transmits IMR configuration information to user equipment, including resource and subframe configuration, allowing user equipment to perform interference measurements based on received IMR indices, and requesting CSI feedback accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing methods are used to transmit IMR configuration information in CoMP systems, then the system structure remains simple, but the interference measurement accuracy and channel state information feedback quality deteriorate
Solution Approach 1:
The IMR configuration information is segmented into multiple parameters including IMR index, resource configuration parameters, and subframe configuration parameters. This segmentation allows the system to transmit comprehensive interference measurement configuration without overwhelming complexity, as each parameter can be independently managed and processed by the user equipment.
Solution Approach 2:
The patent introduces an intermediary indexing mechanism where the IMR configuration information is identified based on an interference measurement resource index. This index acts as a mediator that efficiently references detailed configuration parameters, reducing the amount of explicit signaling required while maintaining measurement accuracy.
2Reliability
If multiple CSI-RS and IMR configuration information are transmitted to user equipment, then the channel state information feedback quality improves, but the signaling overhead and transmission complexity increase
Solution Approach 1:
The patent uses configuration parameter sets that can be reused across multiple IMRs. Instead of transmitting unique detailed configurations for each IMR, the system transmits reference configurations that can be copied and applied to multiple measurement resources, significantly reducing signaling overhead while maintaining the ability to support multiple CSI-RS configurations.
Solution Approach 2:
The IMR configuration information structure is designed to be universal, where a single set of configuration parameters can serve multiple interference measurement purposes. The configuration includes parameters that can be applied across different resource configurations and subframe configurations, allowing one configuration framework to handle multiple CSI-RS and IMR scenarios.
3Measurement precision
If detailed IMR configuration information is transmitted, then the interference measurement precision improves, but the transmission time and processing delay increase
Solution Approach 1:
The patent transmits IMR configuration information in advance before interference measurement is actually needed. The configuration includes resource configuration parameters and subframe configuration parameters that are provided beforehand, allowing user equipment to prepare measurement resources and reducing time-critical signaling during the measurement process itself.
Data Source
AI summary
The disclosure is related to transmitting configuration information of interference measurement resources (IMRs) and measuring interference in a downlink CoMP environment.