Base Station Placement Design for Interference Management

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Solution Overview

Problem

Existing base station placement design techniques fail to effectively expand wireless areas while minimizing quality degradation in existing areas due to inter-cell interference, especially when new base stations are added to cover dead regions.

Innovation Solution

A base station placement design device that calculates communication qualities at candidate locations, aggregates terminals with communication success rates meeting a threshold, and selects optimal placement locations to maximize the number of terminals with satisfactory communication success rates while minimizing quality degradation in existing areas.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If base stations are additionally installed to cover dead regions, then the wireless area is expanded and dead regions are eliminated, but quality degradation occurs in existing wireless areas due to inter-cell interference

Engineering Contradiction:

Improvewireless area coverageVSAvoidcommunication quality in existing areas

Core Design Contradiction:

Area of stationary objectVSReliability

Solution Approach 1:

The patent applies parameter changes by calculating communication success rates using specific parameters including received power, interference power, and path loss. The system evaluates multiple candidate locations by computing parameters such as desired wave received power, interference wave received power, and communication success rate probabilities to determine optimal base station placement that balances area expansion with quality maintenance

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent implements preliminary action by pre-calculating communication success rates for all candidate base station locations before actual deployment. The system performs Monte Carlo simulations and probability calculations in advance to evaluate how each candidate location will affect both new coverage areas and existing wireless quality, allowing selection of the optimal location that minimizes quality degradation before any physical installation occurs

Inventive Principle:

Principle #10Preliminary action

2Quantity of substance

If base station placement is optimized to minimize the number of base stations, then costs are reduced, but dead regions may remain where communication quality is insufficient

Engineering Contradiction:

Improvenumber of base stationsVSAvoidcommunication success rate in dead regions

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The patent applies feedback by using calculated communication success rates as feedback metrics to iteratively evaluate candidate base station locations. The system computes communication success rates for each candidate location based on simulated terminal positions and interference conditions, then uses this feedback information to select locations that maximize coverage while maintaining quality thresholds, ensuring each added base station provides optimal value

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent changes parameters by evaluating multiple candidate locations with different coverage characteristics and selecting the optimal set. The system varies parameters such as base station location coordinates, transmission power levels, and evaluates resulting communication success rates to determine the minimum number of base stations needed to achieve target coverage quality

Inventive Principle:

Principle #35Parameter changes

3Device complexity

If traditional base station placement techniques are used, then simple coverage optimization is achieved, but inter-cell interference is not considered leading to quality degradation

Engineering Contradiction:

Improveplacement design complexityVSAvoidcommunication quality considering interference

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent introduces an intermediary calculation layer that computes communication success rates as a mediator between base station placement decisions and quality outcomes. The system uses Monte Carlo simulation to generate intermediate results showing how proposed placements affect communication quality, then uses these intermediate calculations to adjust placement decisions before final deployment

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent performs preliminary interference analysis by calculating communication success rates for all candidate locations before deployment. The system pre-computes how each candidate base station will interfere with existing cells and how existing cells will interfere with new ones, allowing selection of locations that minimize overall interference impact before any physical installation occurs

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12143924B2Station placement designing apparatus, station placement designing method and program

Publication Date: 2024.11.12 NIPPON TELEGRAPH & TELEPHONE CORP

AI summary

A communication quality calculation unit (11) of a base station placement design device (1) calculates communication quality of each terminal in a case where a base station is installed at a base station placement candidate location for a plurality of base station placement candidate locations. An aggregation unit (12) aggregate the number of terminals whose communication quality calculated by the communication quality calculation unit (11) is equal to or greater than a threshold value for each of the plurality of base station placement candidate locations. A base station placement location selection unit (13) selects a base station placement location from among the plurality of base station placement candidate locations, based on the number of terminals aggregated by the aggregation unit (12) for each of the plurality of base station placement candidate locations.