Division-Free Duplexing Networks With Adaptive Interference Cancellation

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Solution Overview

Problem

Complex communication networks face bottlenecks and delays due to limitations in existing duplexing techniques, such as time-division and frequency-division duplexing, which result in signal interference and limited frequency spectra, especially as network complexity increases.

Innovation Solution

Implementing division-free duplexing (DFD) systems that allow network devices to transmit and receive signals on the same frequency and at the same time, using adaptive filters and high-speed analog-to-digital converters to reduce interference and enable simultaneous transmission and reception, while dynamically switching between conventional and DFD modes based on monitored performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If time-division duplexing is used to separate incoming and outgoing signals, then signal interference is avoided, but communication time is lost due to time-multiplexing

Engineering Contradiction:

Improvesignal interference avoidanceVSAvoidcommunication time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent extracts and removes the transmitted signal component from the received signal using adaptive filtering techniques. The adaptive filter learns the characteristics of the transmitted signal and subtracts it from the composite signal, effectively taking out the interfering transmitted signal to leave only the desired received signal.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent introduces an adaptive filter as an intermediary component between the transmitted and received signals. This filter acts as a mediator that processes the transmitted signal to create an estimate that can be subtracted from the received signal, enabling the separation of simultaneous transmitted and received signals.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If frequency-division duplexing is used to enable simultaneous transmission and reception, then communication efficiency is improved, but the amount of frequency spectra available is limited

Engineering Contradiction:

Improvecommunication efficiencyVSAvoidfrequency spectra

Core Design Contradiction:

ProductivityVSQuantity of substance

Solution Approach 1:

The patent merges the transmitted and received signals into a single communication channel, allowing both signals to coexist on the same frequency simultaneously. By using adaptive filtering to separate the signals after combining, the system achieves frequency-division duplexing without requiring separate frequency allocations, thus maximizing the use of available spectrum resources.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent makes a single frequency channel universal by enabling it to carry both transmitted and received signals simultaneously. The adaptive filtering mechanism allows the same frequency resource to serve multiple functions (uplink and downlink communication) at the same time, increasing spectral efficiency and accommodating more devices.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Stability of the object's composition

If conventional duplexing techniques are used in complex networks, then system stability is maintained, but bottlenecks and delays increase

Engineering Contradiction:

Improvesystem stabilityVSAvoidnetwork throughput

Core Design Contradiction:

Stability of the object's compositionVSProductivity

Solution Approach 1:

The patent implements dynamic adaptive filtering that continuously adjusts its parameters based on the current communication conditions. The adaptive filter learns and adapts to changing signal characteristics in real-time, allowing the system to maintain stability while optimizing performance for varying network loads and interference conditions, thereby reducing bottlenecks and delays.

Inventive Principle:

Principle #15Dynamics

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

DFD systems reduce bottlenecks and delays by minimizing signal interference, enhancing communication efficiency, and accommodating a larger number of devices within the network, thereby improving data transfer and voice communication quality.

Implementation Method 1

use of adaptive filters and high-speed analog-to-digital converters to reduce interference

Methodology Applied

Scientific EffectAdaptive filtering: Filter (electronic)

Implementation Method 2

use of adaptive filters and high-speed analog-to-digital converters to reduce interference

Methodology Applied

Scientific EffectAnalog-to-digital conversion:

Data Source

PatentUS9369260B2Division free duplexing networks

Publication Date: 2016.06.14 BLUE RIDGE INNOVATIONS LLC

AI summary

Provided are methods and systems of using division-free duplexing (DFD) in a communication network. Techniques for applying DFD in a communication network may decrease bottlenecks in the network by allowing one or more network nodes to transmit and on substantially the same frequency and at substantially the same time. In one embodiment, one or more nodes in the network may be DFD enabled, and may be configured to operate in either a conventional mode or a DFD mode. The mode of operation of DFD enabled nodes may depend on the quality of signals transmitted to and/or received at the DFD enabled nodes. Further, the mode of operation may change dynamically, and may be substantially controlled by any suitable processor in the network.