Carrier Wave Allotment for Wireless Interference Reduction

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Solution Overview

Problem

Commercialized wireless mobile networks face interference issues due to radio wave interference between adjacent cells, particularly in closed subscriber group (CSG) networks, where uncertified terminals may receive signals from distant stations, affecting communication quality.

Innovation Solution

An operation and maintenance system that searches wireless resources, updates cell information, and allocates carrier waves based on access mode, wireless capacity, and interference indicators to minimize interference by assigning dedicated, partially shared, or shared carrier waves to stations, prioritizing dedicated waves for CSG modes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If carrier waves are shared between adjacent cells to improve resource utilization, then wireless resource efficiency is improved, but interference between cells increases

Engineering Contradiction:

Improvewireless resource efficiencyVSAvoidinterference between cells

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent segments carrier waves into different types (dedicated carrier waves and shared carrier waves) and assigns them to different access modes. CSG stations receive dedicated carrier waves to avoid interference, while non-CSG stations use shared carrier waves to improve resource utilization. This segmentation resolves the contradiction by allowing different interference levels for different station types.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies different carrier wave allocation strategies to different locations and station types. CSG stations (which require high quality and isolation) receive dedicated carrier waves, while non-CSG stations (which can tolerate some interference) receive shared carrier waves. This local differentiation resolves the contradiction by optimizing for each station's specific requirements.

Inventive Principle:

Principle #3Local quality

2Reliability

If dedicated carrier waves are allotted to CSG stations to reduce interference, then communication quality is improved, but wireless resource utilization deteriorates

Engineering Contradiction:

Improvecommunication qualityVSAvoidwireless resource utilization

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent segments the station population into CSG and non-CSG categories, and assigns different carrier wave types to each segment. CSG stations receive dedicated carrier waves for high reliability, while non-CSG stations share carrier waves to improve overall resource utilization. This segmentation allows the system to achieve both high reliability for critical stations and good resource utilization overall.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent changes the carrier wave allocation parameter based on the station's access mode. For CSG stations, the parameter is set to dedicated carrier waves to ensure communication quality. For non-CSG stations, the parameter is set to shared carrier waves to maximize resource utilization. This parameter change based on station type resolves the contradiction.

Inventive Principle:

Principle #35Parameter changes

3Object-affected harmful factors

If carrier wave allocation is optimized for CSG stations, then interference for certified terminals is reduced, but service availability for uncertified terminals deteriorates

Engineering Contradiction:

Improveinterference for certified terminalsVSAvoidservice availability for uncertified terminals

Core Design Contradiction:

Object-affected harmful factorsVSAdaptability or versatility

Solution Approach 1:

The patent segments the service model into CSG and non-CSG modes, with different carrier wave allocation strategies for each. CSG stations get dedicated carrier waves to minimize interference for certified terminals, while non-CSG stations use shared carrier waves to maintain service availability for uncertified terminals. This segmentation ensures both interference reduction and service availability are addressed.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies different quality levels of carrier wave allocation to different service types. CSG services (which require high quality and exclusivity) receive dedicated carrier waves, while non-CSG services (which prioritize availability) receive shared carrier waves. This local quality differentiation resolves the contradiction between interference reduction and service availability.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS8848567B2Method of allotting carrier to station

Publication Date: 2014.09.30 ELECTRONICS & TELECOMM RES INST

AI summary

Disclosed is a carrier wave allotting method of an operation and maintenance system in a wireless communication network. The carrier wave allotting method includes searching a wireless resource of the wireless communication network; updating cell information indicating information of cells of the wireless communication network; searching an access mode of a station connected with the operation and maintenance system; searching a wireless capacity of the station; and allotting a carrier wave to the station according to the wireless resource, the cell information, the access mode, and the wireless capacity.