Hybrid Noise Interference Measurement for CoMP CSI Reporting
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Solution Overview
Problem
In coordinated multipoint transmission (CoMP) networks, existing CSI reporting methods fail to accurately account for interference from multiple cells, leading to sub-optimum CSI reporting, increased block error rates, and reduced throughput due to incomplete interference consideration in channel quality assessments.
Innovation Solution
A mobile communications device is equipped with a measuring circuit to determine noise and interference levels on both predefined and data resource elements, generating a hybrid noise plus interference level by combining these measurements, which is then used to enhance CSI reporting and interference coordination, thereby providing a more comprehensive interference assessment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate sets of resource elements are used for each CSI estimate, then multiple CSI estimates can be obtained for different transmitters, but the interference conditions on these RE-sets differ from the data signal interference, leading to sub-optimum CSI reporting
Solution Approach 1:
The patent combines interference measurements from separate CSI reference RE-sets with interference measurements from data signal RE-sets to create a comprehensive interference assessment. This merging allows the system to maintain separate CSI estimates for different transmitters while incorporating actual data signal interference conditions, thereby resolving the contradiction between multi-transmitter adaptability and measurement precision.
2Ease of operation
If CSI estimates are based on predefined resource elements, then channel quality assessment can be performed, but interference from multiple cells is not accurately accounted for, leading to increased block error rate
Solution Approach 1:
The patent implements a feedback mechanism where the mobile station measures interference on both CSI reference RE-sets and data signal RE-sets, then feeds back this combined interference information to the network. This feedback loop enables the network to adjust transmissions based on actual interference conditions, improving reliability while maintaining ease of operation through standardized measurement procedures.
3Productivity
If interference measurement is performed on designated resource elements, then CSI reporting can be generated, but relevant interference on data signals is not considered, reducing throughput
Solution Approach 1:
The patent makes the interference measurement system universal by enabling it to measure and report interference from multiple sources (different transmitters and different RE-sets) through a single integrated measurement framework. This multi-functional approach allows comprehensive interference information to be captured without sacrificing CSI reporting efficiency, as the same measurement infrastructure serves multiple assessment purposes.
Data Source
AI summary
A method and mobile communications device for receiving a composite signal composed of a plurality of resource elements, the plurality of resource elements including: a plurality of data resource elements subject to interference; measuring a first noise plus interference level on at least one predefined resource element from the plurality of resource elements; measuring a noise plus interference level on the plurality of data resource elements subject to interference; determining a baseline noise plus interference level common to the plurality of data resource elements subject to interference; and generating a hybrid noise plus interference level by replacing the baseline noise plus interference level with the first noise plus interference level from the at least one predefined resource element.