Wireless Base Station Spatial Multiplexing Interference Cancellation

Solution Overview

Problem

Current spatial multiplexing wireless base stations require complex and time-consuming processes to detect and select terminal equipment for connection, as they need to constantly assess spatial correlation coefficients due to environmental changes, leading to increased processing delays and interference.

Innovation Solution

Terminal equipment communicates with the wireless base station using interference cancellation capability information, allowing for simplified selection and grouping of terminal equipment for spatial multiplexing connections, reducing the need for continuous correlation coefficient detection and improving interference suppression.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If spatial correlation coefficient detection is performed frequently to maintain accurate spatial multiplexing connections, then interference suppression between terminal equipments is improved, but processing time and system complexity increase

Engineering Contradiction:

Improveinterference suppressionVSAvoidprocessing time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent applies preliminary action by having terminal equipments pre-report their interference cancellation capabilities to the base station before spatial multiplexing connections are established. The base station stores this information and uses it for future connection decisions, eliminating the need for repeated detection when spatial correlation coefficients change due to environmental variations.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent uses copying by having terminal equipments report their interference cancellation capability information to the base station, creating a stored representation of their capabilities. This copied information is then reused for multiple connection decisions without requiring repeated measurements, reducing processing time while maintaining connection quality.

Inventive Principle:

Principle #26Copying

2Reliability

If spatial correlation coefficient detection is performed frequently to maintain accurate spatial multiplexing connections, then interference suppression between terminal equipments is improved, but device complexity increases

Engineering Contradiction:

Improveinterference suppressionVSAvoiddetection process complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by having terminal equipments pre-report their interference cancellation capabilities to the base station before spatial multiplexing connections are established. The base station stores this information and uses it for future connection decisions, eliminating the need for repeated detection when spatial correlation coefficients change due to environmental variations.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent uses copying by having terminal equipments report their interference cancellation capability information to the base station, creating a stored representation of their capabilities. This copied information is then reused for multiple connection decisions without requiring repeated measurements, reducing processing time while maintaining connection quality.

Inventive Principle:

Principle #26Copying

3Productivity

If interference cancellation capability information is used for terminal equipment selection, then spatial multiplexing connection efficiency is improved, but information processing requirements increase

Engineering Contradiction:

Improvespatial multiplexing connection efficiencyVSAvoidinformation processing load

Core Design Contradiction:

ProductivityVSQuantity of substance

Solution Approach 1:

The patent applies taking out by extracting only the essential interference cancellation capability information from terminal equipments and reporting it to the base station. This extracted information is sufficient for connection decisions without requiring the base station to process complete channel state information or other redundant data, reducing information processing load while maintaining connection efficiency.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS8593976B2Wireless base station and terminal equipment

Publication Date: 2013.11.26 PANASONIC HOLDINGS CORP

AI summary

It is an object to provide a wireless base station and a terminal equipment capable of shortening the processing time by not requiring the detection of the spatial correlation coefficient, which is required in general technology, and simplifying the selection process for terminal equipments to be connected to each other in a wireless base station that performs spatial multiplexing transmission to a plurality of terminal equipments and a terminal equipment responding for spatial multiplexing transmission.A terminal equipment 12 includes an interference cancellation capability information data maintaining section 20 that maintains interference cancellation capability information data indicating the interference cancellation capability of the terminal equipment 12 and signals the interference cancellation capability information data to a wireless base station 1. The wireless base station 1 includes a control signal extracting unit 3 and a spatial multiplexing controller 4, and the spatial multiplexing controller 4 selects one or more terminal equipments 12 for spatial multiplexing connection on the basis of the interference cancellation capability information data extracted from a reception signal from the terminal equipment 12.