CoMP Reception Antenna Subsets
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Solution Overview
Problem
The computational complexity of coordinated multipoint (CoMP) reception in wireless communication networks is prohibitively high due to the need for joint processing of uplink signals across multiple antennas, limiting its effectiveness, especially with a large number of antennas and fingers.
Innovation Solution
Selecting a subset of sector antennas based on downlink signal strength measurements for CoMP reception, rather than using all antennas, to reduce computational complexity while minimizing performance degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If joint processing of uplink signals is performed across all sector antennas in a CoMP cell, then inter-cell interference mitigation is improved, but computational complexity becomes prohibitively high
Solution Approach 1:
The patent extracts and removes weaker sector antennas from the CoMP processing set, keeping only the strongest antennas based on downlink signal strength measurements. This reduces the number of antennas participating in joint uplink signal processing, thereby reducing computational complexity while maintaining the primary benefit of interference mitigation from the strongest signal sources
Solution Approach 2:
The patent applies different quality thresholds to different sector antennas by evaluating their individual downlink signal strength measurements. Each antenna is assessed locally and only those meeting a predetermined strength threshold are included in the CoMP set, ensuring that only high-quality antenna signals contribute to the joint processing
2Productivity
If a large number of antennas and fingers are allocated for CoMP reception, then system performance is improved, but computational complexity increases significantly
Solution Approach 1:
The patent implements partial action by allocating CoMP resources (antennas and fingers) selectively rather than universally. Instead of using all available antennas and fingers, the system applies downlink signal strength measurements to identify and activate only the necessary subset of antennas and their associated fingers, achieving adequate performance with reduced computational burden
Data Source
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AI summary
Teachings herein offer reduced-complexity coordinated multipoint (CoMP) reception of an uplink signal transmitted by a mobile terminal. The teachings obtain, for each sector antenna in a set of sector antennas deployed in a CoMP cell, a signal strength measurement of one or more downlink signals received by the mobile terminal from a sector associated with that sector antenna. The teachings compare the signal strength measurements and then select from the set, based on that comparison, a subset of sector antennas, for CoMP reception of the uplink signal B) using a subset of sector antennas for CoMP reception, instead of all sector antennas in the set, the teachings i educe the computational complexity of CoMP reception Moreover, the teachings in some embodiments minimize any performance degradation possibly resulting from performing CoMP reception with a reduced number of antennas, by selecting the subset to include sector antennas having the strongest signal strength measurements.