Communication Resource Allocation for Inter-Sector Interference

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Solution Overview

Problem

Multi-sector communication systems face interference and reduced resource efficiency due to overlapping signal beams, leading to degraded signal quality and increased system load, particularly in inter-sector boundary regions, where antenna gain rapidly decreases and ping-pong phenomena occur during frequent handovers.

Innovation Solution

The system allocates orthogonal frequency bands to sectors to minimize inter-sector interference, performs dynamic channel allocation based on signal power ratios, and defines resource regions such as sector dedicated, shared, and common bands to optimize resource reuse and handover efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If frequency resources are reused by neighboring sectors to increase system capacity, then the entire capacity of the multi-sector communication system increases, but inter-sector interference occurs particularly in boundary regions

Engineering Contradiction:

Improvesystem capacityVSAvoidinter-sector interference

Core Design Contradiction:

Quantity of substanceVSObject-affected harmful factors

Solution Approach 1:

The frequency spectrum is segmented into multiple bands, with specific bands allocated to different sectors. This segmentation allows each sector to use dedicated frequency bands without interference from neighboring sectors, while still enabling overall system capacity expansion through coordinated resource allocation across sectors.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different frequency band allocation strategies are applied to different spatial regions. Boundary regions receive orthogonal frequency bands from neighboring sectors to eliminate interference, while central regions can utilize frequency reuse. This local differentiation optimizes both interference mitigation in critical areas and system capacity in non-critical areas.

Inventive Principle:

Principle #3Local quality

2Reliability

If sector antennae transmit beams that cover boundary regions to provide service continuity, then mobile stations in boundary regions maintain connection, but signal overlap and severe interference occur between sectors

Engineering Contradiction:

Improveservice continuityVSAvoidsignal overlap interference

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The frequency spectrum is divided into multiple bands, with specific bands allocated to different sectors. This segmentation allows each sector to use dedicated frequency bands without interference from neighboring sectors, while still enabling overall system capacity expansion through coordinated resource allocation across sectors.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Inventive Principle:

Principle #3Local quality

3Speed

If dynamic channel allocation is performed rapidly to handle user movement between sectors, then handover speed increases, but system load increases due to ping-pong phenomena

Engineering Contradiction:

Improvehandover speedVSAvoidsystem load

Core Design Contradiction:

SpeedVSDevice complexity

Solution Approach 1:

Frequency bands are pre-allocated to sectors before mobile stations need to hand over. This preliminary arrangement eliminates the need for rapid dynamic channel allocation during handover, as mobile stations can seamlessly switch sectors using pre-assigned orthogonal bands, thereby reducing system load and preventing ping-pong phenomena while maintaining fast handover capability.

Inventive Principle:

Principle #10Preliminary action

4Object-affected harmful factors

If orthogonal frequency bands are allocated to boundary regions to eliminate interference, then inter-sector interference is minimized, but frequency resource reuse efficiency decreases

Engineering Contradiction:

Improveinter-sector interferenceVSAvoidfrequency resource reuse efficiency

Core Design Contradiction:

Object-affected harmful factorsVSQuantity of substance

Solution Approach 1:

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

Inventive Principle:

Principle #1Segmentation

Data Source

PatentEP2127147B1System and method for using resources in a communication system

Publication Date: 2019.07.31 AJOU UNIV IND ACADEMIC COOP FOUND

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AI summary

In a method for using resources in a communication system, a communication region is divided into inter-sector boundary regions, sector central regions, and a sector common region, and predetermined resources are allocated to the divided regions.