Telecommunication Controller for Small Cell Energy Management
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Solution Overview
Problem
Current energy-saving techniques for small cell base stations in wireless telecommunications networks require significant energy consumption due to the need for continuous radio signal reception during sleep modes, and existing methods are impractical for multi-vendor deployments and indoor environments, leading to inefficiencies and increased costs.
Innovation Solution
A centralized telecommunication controller manages energy-efficient sleep modes by calculating signal attenuations between small cell base stations, selecting the smallest subset to remain permanently active, and adjusting transmission powers to maintain continuous coverage and prevent overload, using standardized measurements to avoid vendor-specific complexities and signaling overheads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If small cell base stations are placed into low power sleep mode during quiet periods, then energy consumption is reduced, but coverage continuity and service availability deteriorate
Solution Approach 1:
The system dynamically transitions small cell base stations between active and sleep modes based on real-time traffic conditions. The controller monitors traffic load and automatically activates or deactivates cells, making the network adaptable to changing demands while optimizing energy consumption and maintaining coverage continuity.
Solution Approach 2:
The controller pre-calculates and identifies subsets of small cell base stations that should remain permanently active to maintain coverage continuity. By determining these critical cells in advance based on geographic distribution and coverage requirements, the system ensures that coverage is maintained even when other cells are in sleep mode.
2Reliability
If multiple small cell base stations remain permanently in active mode to ensure coverage continuity, then coverage reliability is improved, but energy consumption increases
Solution Approach 1:
Instead of keeping all small cell base stations permanently active, the system identifies and activates only the minimum necessary subset of cells that replicate the coverage function. This subset acts as a simplified copy of the full active network, providing sufficient coverage while consuming significantly less energy.
Solution Approach 2:
The system changes the operational state parameter of small cell base stations from permanently active to conditionally active. By controlling the activation state based on traffic conditions and coverage requirements, the system optimizes the balance between coverage reliability and energy consumption.
3Use of energy by moving object
If centralized control is implemented to manage sleep modes across multiple small cell base stations, then energy efficiency is improved, but system complexity and signaling overhead increase
Solution Approach 1:
A centralized controller is introduced as an intermediary to manage sleep modes across multiple small cell base stations. This controller receives traffic information, determines optimal activation subsets, and sends control signals to individual cells, simplifying the overall system architecture while improving energy efficiency through coordinated management.
4Reliability
If traffic load balancing is implemented by activating additional small cell base stations, then service quality is improved, but energy consumption increases
Solution Approach 1:
The system dynamically adjusts the number of active small cell base stations based on real-time traffic load conditions. When traffic increases, additional cells are activated to balance the load and maintain service quality. When traffic decreases, cells are deactivated to save energy, creating a dynamic response to changing service demands.
Data Source
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AI summary
A telecommunication controller is provided configured for connection with multiple small cell base stations, the controller comprising: a received power estimation stage configured to calculate from determined signal attenuations between the small cell base stations, for each of a plurality of subsets of the small cell base stations transmitting a pilot signal at a given power, the pilot signal powers expected to be received at the other small cell base stations; a comparison stage configured to compare said pilot signal powers expected to be received at each of the other base stations to a minimum received power threshold; a selector stage configured to select, from among the plurality of subsets of small cell base stations, the smallest subset that, or one of the smallest subsets that, provides pilot signal power above the threshold at each of the other small cell base stations; and an instruction stage configured to send an instruction to each small cell base station in that subset to remain permanently in active mode.