Base Station Pilot Channel Shutdown for Energy Reduction
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Solution Overview
Problem
Cellular base stations continuously consume power even when there are no wireless communication devices nearby, leading to unnecessary energy expenditure.
Innovation Solution
Implementing methods to reduce energy consumption by shutting off unused pilot channels and carriers in base stations when no multiple-input and multiple-output users are present, and redirecting user equipment to carriers with higher loads, as well as disabling baseband unit subunits during low load conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If base stations continuously operate all pilot channels and carriers, then communication coverage and service availability are maintained, but energy consumption increases unnecessarily
Solution Approach 1:
The base station dynamically adjusts its operational state by switching between full operation mode (all carriers and pilot channels active) and energy-saving mode (reduced carriers and pilot channels active) based on real-time traffic load conditions. This dynamic adaptation allows the system to maintain service availability when needed while reducing power consumption during low-traffic periods.
Solution Approach 2:
The system changes operational parameters (carrier activation state, pilot channel transmission state) based on traffic load thresholds. When traffic load falls below a predetermined threshold, the base station transitions to energy-saving mode by deactivating certain carriers and pilot channels, thereby reducing power consumption while maintaining essential communication services.
2Adaptability or versatility
If multiple pilot channels are transmitted for MIMO users, then multiple-input multiple-output communication capability is maintained, but energy consumption increases when no MIMO users are present
Solution Approach 1:
The base station transmits only the necessary number of pilot channels based on current MIMO user presence. When no MIMO users are detected, the system reduces pilot channel transmission from multiple channels to a single pilot channel or shuts it off completely, thereby eliminating unnecessary energy consumption from power amplifiers while maintaining MIMO capability when users are present.
3Productivity
If all carriers are kept active, then user equipment can be served across multiple frequency resources, but energy is wasted on low-utilization carriers
Solution Approach 1:
The system extracts and removes underutilized carriers from active operation when traffic load is below thresholds. By identifying carriers with minimal traffic and shutting them off, the base station eliminates energy waste on these idle resources while redirecting user equipment to remaining active carriers, thereby maintaining overall system productivity with reduced energy consumption.
Data Source
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AI summary
A method for reducing energy consumption of a base station is described. A first pilot channel is transmitted via a first antenna using a first downlink power amplifier. A second pilot channel is transmitted via a second antenna using a second downlink power amplifier. It is determined that no multiple-input and multiple-output users are in a cell corresponding to the base station. The second pilot channel is shut off.