MIMO Rate Request Signaling With Fewer Antenna Feedback Signals

Solution Overview

Problem

In conventional MIMO communication schemes, independently setting transmission rates per antenna leads to increased interference and power consumption due to the high number of transmission rate request signals transmitted, which negatively impacts other receivers and increases power consumption.

Innovation Solution

A communication apparatus and method that reduces the transmission of transmission rate request signals by comparing the difference between transmission rate request signals from multiple antennas and a predetermined value, transmitting only the necessary signals, thereby controlling the transmission to correspond to fewer antennas than the total number of transmitting antennas.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If transmission rate request signals are transmitted for all antennas independently, then transmission efficiency is improved, but interference to other receivers increases and power consumption increases

Engineering Contradiction:

Improvetransmission efficiencyVSAvoidinterference to other receivers

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent merges the transmission rate request signals for multiple antennas into a single composite signal. Instead of transmitting separate CQI values for each antenna independently, the receiver combines the channel quality information from multiple antennas into one aggregated transmission rate request signal, reducing the total number of signals transmitted and thereby reducing interference to other receivers.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent creates a universal transmission rate request signal that represents the combined channel quality across multiple antennas. This single signal serves the function of multiple individual antenna-specific signals, providing a multi-antenna channel quality indicator that can be used for transmission rate determination without requiring separate signals for each antenna.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Productivity

If transmission rate request signals are transmitted for all antennas independently, then transmission efficiency is improved, but power consumption increases

Engineering Contradiction:

Improvetransmission efficiencyVSAvoidpower consumption

Core Design Contradiction:

ProductivityVSUse of energy by moving object

Solution Approach 1:

The patent merges the transmission rate request signals for multiple antennas into a single composite signal. Instead of transmitting separate CQI values for each antenna independently, the receiver combines the channel quality information from multiple antennas into one aggregated transmission rate request signal, reducing the total number of signals transmitted and thereby reducing interference to other receivers.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent creates a universal transmission rate request signal that represents the combined channel quality across multiple antennas. This single signal serves the function of multiple individual antenna-specific signals, providing a multi-antenna channel quality indicator that can be used for transmission rate determination without requiring separate signals for each antenna.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Object-affected harmful factors

If the number of transmission rate request signals is reduced, then interference and power consumption are reduced, but transmission efficiency may be reduced

Engineering Contradiction:

Improveinterference to other receiversVSAvoidtransmission efficiency

Core Design Contradiction:

Object-affected harmful factorsVSProductivity

Solution Approach 1:

The patent changes the parameter representation by transforming multiple antenna-specific channel quality parameters into a single aggregated parameter. The receiver processes the channel quality information from multiple antennas and converts it into a unified transmission rate request signal that captures the essential channel conditions without requiring multiple separate signals.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent performs preliminary processing of channel quality information at the receiver before transmission. The receiver预先 combines and processes the channel quality data from multiple antennas into a single aggregated signal, so that when the signal is transmitted, it already contains the combined information needed for transmission rate determination, eliminating the need for multiple separate transmissions.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS8064538B2Communication device and communication method

Publication Date: 2011.11.22 GODO KAISHA IP BRIDGE 1

AI summary

There is provided a communication device capable of transmitting a transfer rate request signal while reducing it and reducing the interference and power consumption when the transfer rate request signal is transmitted substantially without lowering the transmission efficiency in the MIMO communication method. In this device, a modulation encoding unit (125) encodes and modulates transmission data transmitted to a communication partner of the MIMO communication method and the transfer rate request signal in the plurality of transmission antennas. A transmission unit (132) and a transmission antenna (134) transmit a signal from the modulation encoding unit (125). A transmission control unit (120) controls transmission of a signal transmitted from the transmission antenna (134) and transmits a transfer rate request signal of one transmission antenna via the transmission antenna (134) according to a comparison result between a difference of the transfer rate request signal in the respective transmission antenna of the communication partner and a predetermined value.