Terminal Interference Measurement Resource Configuration
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Solution Overview
Problem
Future radio communication systems, such as 5G and NR, face complex multi-user interference states during multi-layer transmission, making accurate interference measurement challenging.
Innovation Solution
A user terminal receives information related to interference measurement resources, including combinations of ports and/or channels, and controls DL signal measurements based on this information to flexibly configure interference measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If MU-MIMO with eight layers or more is implemented to provide enhanced Mobile Broadband services, then data transmission capacity is improved, but multi-user interference complexity increases making accurate interference measurement difficult
Solution Approach 1:
The patent segments the interference measurement process by introducing separate interference measurement resources (IMRs) for different layers and user terminals. This allows the terminal to measure interference from specific layers or groups of layers independently, rather than attempting to measure all interference simultaneously across multiple layers, thereby simplifying the measurement task while maintaining accuracy in high-capacity MU-MIMO scenarios
Solution Approach 2:
The patent introduces reference signals as intermediary elements that facilitate interference measurement. These reference signals are specifically designed to represent interference conditions without being the actual data-bearing signals, allowing terminals to measure interference characteristics indirectly through dedicated measurement resources that mimic real interference scenarios
2Measurement precision
If flexible interference measurement configuration is implemented for multi-layer transmission, then interference measurement accuracy is improved, but system complexity increases
Solution Approach 1:
The patent implements dynamic interference measurement configuration where measurement resources, layers, and parameters can be adjusted based on current channel conditions, traffic requirements, and interference scenarios. This allows the system to adapt measurement complexity to actual needs rather than maintaining fixed high-complexity measurements in all cases, achieving accuracy when needed while reducing complexity when conditions permit
Solution Approach 2:
The patent changes key measurement parameters such as the number of layers to measure, measurement resource allocation, and measurement timing based on system conditions. By dynamically adjusting these parameters rather than using fixed configurations, the system achieves high measurement accuracy when complex multi-layer scenarios require it, while simplifying measurements in less demanding conditions
Data Source
AI summary
A terminal is disclosed that includes a receiver that receives, via higher layer signaling, configuration information indicating a first resource for interference measurement, a second resource of non-zero power (NZP) channel state information reference signal (CSI-RS) for interference measurement, and a third resource of NZP CSI-RS for channel measurement. The terminal also includes a processor that performs interference measurement by using the first resource or the second resource, and performs channel measurement by using the third resource. The configuration information indicates a plurality of combinations of a third resource candidate and at least one of a first resource candidate and a second resource candidate. The processor uses, for measurement, a combination indicated by downlink control information among the plurality of combinations. In other aspects, a radio communication method, a base station, and a system are also disclosed.