Wireless Access Point Interference Cancellation via Parameter Sharing

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Solution Overview

Problem

Full duplex communication mode in wireless networks is limited by co-channel interference, which reduces spectral efficiency and prevents the realization of theoretical gains, especially on the uplink, due to the simultaneous use of the same radio resources by access points and terminals.

Innovation Solution

A method where a first access point in a wireless communication network shares transmission parameters with second access points to enable interference cancellation techniques, allowing these access points to detect and eliminate interference signals, thereby improving spectral efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If full duplex communication mode is used to double spectral efficiency, then downlink throughput is improved, but uplink performance deteriorates due to co-channel interference from other access points

Engineering Contradiction:

Improvespectral efficiencyVSAvoidco-channel interference

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent applies preliminary action by having the first access point transmit its downlink transmission parameters to the second access point before the interference occurs. This allows the second access point to pre-process the received signal and cancel the interference from the first access point, thereby resolving the contradiction between maintaining full duplex spectral efficiency and eliminating co-channel interference on the uplink

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements feedback by creating a communication loop where the first access point shares its transmission parameters with the second access point. This feedback mechanism enables the second access point to adapt its signal processing based on known interference characteristics, allowing interference cancellation while maintaining full duplex operation

Inventive Principle:

Principle #23Feedback

2Adaptability or versatility

If the same radio resources are used simultaneously for uplink and downlink communications, then resource utilization is improved, but interference between communications increases

Engineering Contradiction:

Improveradio resource utilizationVSAvoidinterference signal

Core Design Contradiction:

Adaptability or versatilityVSObject-generated harmful factors

Solution Approach 1:

The patent converts the harmful interference signal into a beneficial element by having the second access point use the known transmission parameters of the first access point to reconstruct and subtract the interference from the received signal. This transforms the interference problem into an opportunity for improved signal recovery and maintains high radio resource utilization

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Data Source

PatentUS20220173823A1Communication method and devices of a wireless communication network

Publication Date: 2022.06.02 ORANGE SA

AI summary

Communication method and devices of a wireless communication network comprising a first access point to the network and at least one second access point to the network, the first access point generating, when communicating on a downlink channel established with a first terminal, an interference signal affecting at least one communication from the at least one second access point on at least one uplink channel established with at least one second terminal are described. The communication method can be implemented by a first device of a wireless communication network and includes sending via the first device of the network to the at least one second access point at least one datum representative of a set of transmission parameters used by the first access point when communicating with the first terminal on the downlink channel.