Interference Control Apparatus for Wireless Cooperation

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Solution Overview

Problem

Signal interference in personal area networks, particularly in the 2.4 GHz ISM band, is significant due to coexistence with other communication systems like WLAN, Bluetooth, and WiFi, leading to reduced communication efficiency and limited frequency channels available for interference avoidance.

Innovation Solution

An interference control apparatus and method that determine the magnitude and protocol type of interference signals, enabling wireless cooperation between neighboring mobile hubs to cancel interference using multi-user multiple input multiple output (MU-MIMO) decoding and adaptive frequency reuse, minimizing interference through coordinated communication between high spectral efficiency (HSE) and ultra low power (ULP) links.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If frequency sharing scheme is used in ISM band, then communication systems can coexist in the same band, but signal interference between communication systems increases

Engineering Contradiction:

Improvefrequency band sharing capabilityVSAvoidsignal interference

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The system segments the frequency band into multiple channels and divides communication resources among different systems. By assigning specific channels to different protocols (WiFi, Bluetooth, ZigBee) and using channel hopping techniques, the patent reduces simultaneous transmissions on the same frequency, thereby mitigating interference while maintaining coexistence capability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements dynamic frequency selection and adaptive channel allocation where communication systems can switch between channels based on current interference conditions. This dynamic approach allows systems to adapt to changing spectral environments, selecting less congested channels to minimize interference while maintaining access to the ISM band.

Inventive Principle:

Principle #15Dynamics

2Reliability

If wideband interference avoidance is implemented in personal area network, then communication reliability improves, but number of available frequency channels decreases

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidnumber of frequency channels

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent introduces spatial dimension by implementing distributed antenna systems and multiple transmit/receive points. By utilizing spatial diversity and multi-user MIMO techniques, the system can maintain communication reliability through spatial separation and signal processing while continuing to use the same frequency channels, thus avoiding the reduction in channel quantity.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The system employs composite signaling approaches combining multiple modulation schemes, coding techniques, and transmission methods. By creating composite communication signals that are more robust to interference through diversity combining and error correction, the patent maintains reliability without needing to reduce the number of available frequency channels.

Inventive Principle:

Principle #40Composite materials

3Object-affected harmful factors

If interference cancellation through wireless cooperation is implemented, then signal interference reduces, but system complexity increases

Engineering Contradiction:

Improvesignal interferenceVSAvoidsystem complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent merges multiple transmission points and receivers into a cooperative network where signals are combined through signal processing. By integrating multiple nodes that work together to transmit and receive signals, the system achieves interference cancellation through constructive combining of desired signals and suppression of interfering signals, managing complexity through coordinated operation rather than isolated complex processing at each node.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent introduces signal processing algorithms and control mechanisms as intermediaries that manage the cooperation between multiple nodes. These intermediary processing layers handle the coordination, synchronization, and signal combining operations, abstracting the complexity from the physical hardware and enabling interference cancellation through software-based signal processing rather than complex hardware modifications.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS9137673B2Interference control system for simultaneously supporting low power communication and high spectral efficient communication

Publication Date: 2015.09.15 SAMSUNG ELECTRONICS CO LTD

AI summary

Provided are a method and apparatus for controlling signal interference between networks in a personal area network. In one embodiment, an interference control apparatus may include: a cooperation determining unit configured to determine whether to perform a wireless cooperation with a neighboring mobile hub that manages a neighboring sensor node, based on a magnitude of an interference signal from the neighboring sensor node; a transmitter configured to transmit, to the neighboring mobile hub via a first communication link, first information received from a target sensor node; a receiver configured to receive the first information from the target sensor node via a second communication link, and to receive second information from the neighboring mobile hub via the first communication link; and a decoding unit configured to perform wireless cooperative multi-user decoding based on the first information and the second information.