Access Point Dynamic Power Control for Macro Network Interference
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Solution Overview
Problem
Femto or micro base stations (Access Points) can cause interference and create coverage holes in macro mobile telecommunications networks due to overlapping coverage, and they require easy configuration for end-user installation without compromising network capacity.
Innovation Solution
A method and system for dynamically determining and adjusting the output power level of Access Points based on parameters such as distance from mobile terminals, service type, and available channel capacity, minimizing interference while ensuring adequate coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If Access Points are deployed to increase network capacity and improve coverage, then network capacity and coverage are improved, but interference and coverage holes in the macro network increase
Solution Approach 1:
The patent implements dynamic output power adjustment in Access Points based on real-time measurements of mobile terminal distance and signal conditions. The system continuously monitors parameters such as path loss, received signal strength, and mobile terminal position to adaptively control the transmit power level, transitioning from static to dynamic power management to resolve the interference issue while maintaining network capacity benefits
Solution Approach 2:
The patent establishes a feedback mechanism where the Access Point receives measurement reports from mobile terminals regarding signal strength, distance, and channel conditions. This feedback loop enables the Access Point to adjust its output power dynamically, reducing interference when mobile terminals are close and increasing power when needed for coverage, thus resolving the contradiction between providing coverage and causing interference
2Area of stationary object
If Access Points transmit at high power levels to ensure coverage, then coverage area is improved, but interference with neighboring APs and macro network increases
Solution Approach 1:
The patent applies local quality by adjusting the transmit power of each Access Point based on local conditions such as the position of mobile terminals, signal strength measurements, and local interference levels. Instead of uniform high power transmission, each AP adapts its power level to local coverage requirements, ensuring adequate coverage while minimizing interference to neighboring cells and macro network
Solution Approach 2:
The patent changes the power transmission parameter dynamically based on measured conditions. The system monitors parameters such as path loss, received signal code power, and mobile terminal distance, then adjusts the output power parameter accordingly. This parameter adaptation allows the system to optimize coverage area while controlling interference levels through continuous parameter adjustment
3Ease of operation
If Access Points are made easily configurable for end-user installation, then ease of installation is improved, but configuration precision and network optimization may be compromised
Solution Approach 1:
The patent implements self-service by enabling Access Points to automatically configure and optimize their own operation without requiring manual intervention from end users or network operators. The system performs automatic power level determination, interference measurement, and parameter optimization based on real-time network conditions, thus maintaining ease of installation while achieving precise configuration through autonomous self-optimization capabilities
Data Source
AI summary
A mobile telecommunications network, such as a GSM, UMTS or LTE network, may include, in addition to the conventional radio access network comprising the base stations, one or more additional access points. An access point may be connected to the network core by an IP transport broadband connection. The access point may be configured to appear to the mobile terminal as a conventional base station. Arrangements are disclosed which allow the access point to dynamically adjust the power output through its Common Pilot Channel relative to one or more users. In other words, the greater the distance a user is from the access point, the greater the output power.