DECT-LTE Base Unit Sub-Band Interference Avoidance

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Solution Overview

Problem

There is no existing communication system that integrates Digital Enhanced Cordless Telecommunications (DECT) and Long-Term Evolution (LTE) communication, limiting the ability to transfer data between DECT terminals and LTE base stations.

Innovation Solution

A communication device is developed with both DECT and LTE communication units, allowing DECT communication with terminals and LTE communication with an LTE carrier gateway through an LTE base station, where the DECT communication unit adjusts its sub-bands to avoid interference with adjacent LTE frequency bandwidths.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If DECT communication uses a sub-band adjacent to LTE frequency bandwidth, then DECT communication can be established, but interference occurs between DECT and LTE signals

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidfrequency interference

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent extracts the problematic adjacent sub-band from DECT communication operation when LTE is detected in the adjacent frequency bandwidth. The base unit actively monitors for LTE signals and selectively disables or avoids using the adjacent DECT sub-band, thereby removing the source of interference while maintaining DECT communication on non-interfering sub-bands

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent implements dynamic sub-band selection for DECT communication based on real-time detection of LTE frequency usage. The system continuously monitors adjacent frequency bands and dynamically adjusts which DECT sub-bands are active, switching between different sub-bands as LTE usage patterns change, thereby adapting to varying spectral conditions to prevent interference

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If a communication system integrates both DECT and LTE standards, then communication versatility is improved, but system complexity increases

Engineering Contradiction:

Improvecommunication standard compatibilityVSAvoiddual-communication-unit complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements multi-functionality by integrating both DECT and LTE communication units within a single base unit device. The base unit serves multiple communication purposes: it provides DECT communication with handsets and simultaneously performs LTE communication with carrier gateways, making the device universally capable of operating with multiple communication standards and network types

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent introduces a frequency monitoring mechanism as an intermediary component that mediates between the DECT and LTE communication units. This monitoring function detects LTE frequency usage and controls DECT sub-band selection, acting as a mediator that coordinates the two communication systems to prevent interference while maintaining both functionalities

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS10149297B2Communication device

Publication Date: 2018.12.04 PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD

AI summary

Data is transferred between a DECT terminal and an LTE base station. A base unit includes a DECT communication unit and an LTE communication unit, the DECT communication unit performing DECT communication with a DECT terminal, and the LTE communication unit transmitting and receiving data with the DECT communication unit and performing LTE communication with an LTE carrier gateway through an LTE base station. The DECT communication unit, in a case where an adjacent frequency bandwidth that is adjacent to one of DECT communication sub-bands is used in the LTE communication, controls the DECT communication to be performed by using the other sub-band.