Energy-Efficient Base Station Sleep Mode Control
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Solution Overview
Problem
The deployment of home base stations in cellular telecommunication systems leads to increased radio transmission interference and energy consumption, particularly when many femtocells are deployed, degrading radio environment quality and network performance, and contributing to rising energy costs.
Innovation Solution
Implementing an energy-efficient base station (EEBS) that enters a low-power 'sleep mode' when no authorized users are present, reducing radio transmissions, and using methods to wake up the base station when an authorized user is nearby, such as through fingerprint detection and paging mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If home base stations are deployed to increase network capacity, then network coverage and service availability are improved, but radio transmission interference increases and energy consumption rises
Solution Approach 1:
The base station dynamically adjusts its operational state between active and sleep modes based on real-time detection of authorized users. When no authorized users are detected, the base station enters sleep mode to reduce interference and energy consumption. When authorized users are detected, it transitions back to active mode, creating a dynamic adaptation that resolves the contradiction between maintaining network capacity and reducing harmful interference.
Solution Approach 2:
The system changes the transmission parameter state by entering sleep mode, which fundamentally alters the radio transmission characteristics. In sleep mode, the base station reduces or stops radio transmissions, thereby changing the parameter of transmission intensity from high (active mode) to low or zero (sleep mode), effectively reducing interference while preserving the ability to restore capacity when needed.
2Reliability
If home base stations operate continuously to maintain network availability, then service reliability is improved, but energy consumption increases
Solution Approach 1:
The base station implements dynamic operational scheduling by transitioning between active and sleep states. This dynamic approach maintains reliability by ensuring the base station is active when authorized users need service, while reducing energy consumption by entering sleep mode during periods of no authorized users, thus resolving the contradiction between continuous availability and energy efficiency.
Solution Approach 2:
The system employs feedback mechanisms where the base station continuously detects the presence or absence of authorized users and adjusts its operational state accordingly. This feedback-driven control ensures that the base station remains available when needed (maintaining reliability) while consuming minimal energy when no users are present, effectively resolving the contradiction between service reliability and energy consumption.
3Reliability
If base stations transmit reference signals and system information frequently, then user access reliability is improved, but energy consumption and interference increase
Solution Approach 1:
Instead of continuous transmission, the base station implements periodic transmission of reference signals and system information. During active mode, these transmissions occur at standard intervals to maintain user access reliability. When entering sleep mode, transmissions are reduced or suspended, thereby reducing energy consumption and interference while preserving the ability to restore reliable access when authorized users are detected.
Data Source
AI summary
The basic idea of the present invention is to let the base station enter a low-power, low-radiation cycle, the so called “sleep mode”, when there are no UEs using it and to introduce methods to “wake up” the base station from this state when there is a UE in the vicinity which is allowed to access the base station and which may need it on short notice.