Multicell MIMO Triggering via Normalized Interference Power Thresholds
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Solution Overview
Problem
Existing multicell MIMO schemes in multiple antenna systems require complex trigger mechanisms that burden mobile stations with extensive feedback information, particularly for channel environment adaptation, leading to inefficiencies in interference management and scheduling.
Innovation Solution
A method and apparatus for triggering multicell MIMO schemes by transmitting Normalized Interference Power (NIP) feedback from mobile stations to base stations, selecting thresholds, and determining the appropriate MIMO scheme based on these thresholds to efficiently manage interference and optimize multicell MIMO operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If trigger mechanisms are designed for multicell MIMO schemes, then adaptability to channel environment is improved, but device complexity and feedback burden increase
Solution Approach 1:
The patent extracts only the essential trigger information (NIP threshold) from the complex channel environment parameters. Instead of requiring MS to feedback comprehensive channel state information, the system only extracts and transmits the NIP threshold value that triggers multicell MIMO schemes, significantly reducing feedback burden while maintaining adaptability
Solution Approach 2:
The patent introduces NIP (Normalized Interference Power) threshold as an intermediary parameter between the complex channel environment and the MIMO scheme selection. This intermediary simplifies the trigger mechanism by using a single threshold value that represents the overall channel condition, avoiding the need for complex feedback processing
2Measurement precision
If extensive feedback information is required from mobile stations, then scheduling accuracy is improved, but loss of time and productivity decrease
Solution Approach 1:
The patent applies partial action by requiring only the necessary minimum feedback (NIP threshold) rather than complete channel state information. This partial feedback approach provides sufficient accuracy for trigger decision-making while dramatically reducing the time required for feedback processing and transmission
3Object-affected harmful factors
If complicated scheduling is performed by base stations, then interference management is improved, but device complexity increases
Solution Approach 1:
The patent changes the scheduling approach from complex multi-parameter optimization to simple threshold-based decision-making. By using NIP threshold comparison, the system maintains effective interference management through trigger-based scheme selection while significantly reducing scheduling complexity at the base station
Data Source
AI summary
A method for triggering multicell MIMO schemes in a multiple antenna system includes transmitting, at a Mobile Station (MS), a first feedback information for single-cell closed-loop MIMO to a Base Station (BS); requesting, at the BS, Normalized Interference Power (NIP) feedback from the MS based on the first feedback information; feeding, at the MS, the NIP back to the BS; selecting, at the BS, a first NIP threshold and a second NIP threshold based on the NIP fed back from the MS; and requesting, at the MS, one of a first MIMO scheme and a second MIMO scheme by comparing the calculated first and second NIPs with the first NIP threshold and the second NIP threshold.