Small Cell Spectrum Utilization for High Power Base Stations

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Solution Overview

Problem

High power base station cell spectrum is often underutilized in areas with limited or no coverage, leading to wasted resources, as existing technologies do not effectively exploit the spectrum in situations where high power base station cell coverage is not available.

Innovation Solution

Small cells with multi-carrier support can dynamically utilize the high power base station cell spectrum by detecting the absence of coverage or users, allowing them to transmit data on both small cell and high power base station cell spectrums to enhance data rates and serve more users.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If high power base station cell is deployed to provide coverage, then coverage area is improved, but spectrum utilization deteriorates in areas where coverage is not needed

Engineering Contradiction:
Improvecoverage areaVSAvoidspectrum utilization
Core Design Contradiction:
Area of stationary objectVSLoss of energy

Solution Approach 1:

The small cell dynamically adjusts its operation by detecting the presence or absence of high power base station cell coverage in real-time. When coverage is detected, the small cell remains dormant or operates at minimal power. When coverage is absent, the small cell activates to provide service. This dynamic adaptation resolves the contradiction by making the system flexible rather than static.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The small cell autonomously detects coverage conditions and makes decisions about when to activate or deactivate without requiring continuous control from the high power base station. The system self-regulates spectrum usage based on local conditions, allowing high power base station spectrum to be fully utilized where coverage exists while enabling small cell supplementation where coverage is absent.

Inventive Principle:
Principle #25Self-service

2Productivity

If small cell is deployed to supplement coverage, then network capacity is improved, but spectrum waste occurs when high power base station cell coverage is available

Engineering Contradiction:
Improvenetwork capacityVSAvoidspectrum waste
Core Design Contradiction:
ProductivityVSLoss of energy

Solution Approach 1:

The small cell implements a feedback mechanism by continuously monitoring for the presence of high power base station cell coverage signals. Based on this feedback, the small cell adjusts its transmission behavior - remaining inactive when coverage is present and activating when coverage is absent. This feedback loop ensures optimal spectrum utilization while maintaining network capacity.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The system transitions from a static deployment model to a dynamic one where the small cell's operational state changes based on real-time detection of high power base station coverage conditions, allowing the network to adapt to varying demand and coverage scenarios.

Inventive Principle:
Principle #15Dynamics

3Speed

If small cell dynamically utilizes high power base station cell spectrum, then data rate is improved, but system complexity increases

Engineering Contradiction:
Improvedata rateVSAvoidsystem complexity
Core Design Contradiction:
SpeedVSDevice complexity

Solution Approach 1:

The small cell performs autonomous detection of high power base station coverage and automatically decides when to activate or deactivate. This self-service capability eliminates the need for complex centralized control mechanisms while enabling dynamic spectrum utilization that improves data rates without proportionally increasing system complexity.

Inventive Principle:
Principle #25Self-service

Data Source

PatentEP3092740B1Method and apparatus for time and spatial utilization of a high power base station cell spectrum by a small cell
Publication Date: 2017.11.15 QUALCOMM INC
  • EP3092740B1 patent drawingFigure 1
  • EP3092740B1 patent drawingFigure 2
  • EP3092740B1 patent drawingFigure 3

AI summary

Aspects of the methods and apparatus relate to exploiting the spectrum of a high power base station cell to provide higher capacity in a wireless communication system. Generally, a small cell with multi-carrier support may detect an absence of high power base station cell coverage or absence of high power base station cell users and may harness the high power base station cell carrier spectrum to provide higher data download rates and/or serve more mobility users. Specifically, aspects of the methods and apparatus include transmitting a first signal on a first carrier from a first access point and determining a current ability of a second access point on a second carrier. Thereafter, aspects of the methods and apparatus include transmitting a second signal on the second carrier from the first access point according to the determined current ability of the second access point.