NR Base Station Energy Saving Mode Signal Transmission
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Solution Overview
Problem
New Radio (NR) base stations experience high power consumption due to increased antenna units and RF channels for analog beamforming, leading to significant energy inefficiency, especially when transitioning between energy-saving states, causing service interruptions and affecting user experiences.
Innovation Solution
A method where terminal equipment receives master and system information blocks from a first cell and detects reference signals from a second cell, allowing it to maintain synchronization and initiate services without interruptions during energy-saving states, by transmitting necessary information and signals between cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the NR base station increases the number of antenna units and RF channels for analog beamforming, then the signal transmission distance and coverage are improved, but the power consumption increases significantly
Solution Approach 1:
The base station dynamically adjusts its operating state between normal mode and energy-saving mode based on traffic conditions. In energy-saving mode, the base station reduces power consumption by shutting down certain RF channels and antenna units while maintaining basic synchronization signal transmission, thus resolving the contradiction between transmission distance and power consumption.
Solution Approach 2:
The system changes operational parameters by transitioning between different states (normal vs. energy-saving). In energy-saving state, the base station transmits common signals with reduced power and fewer antenna elements, effectively changing the transmission parameters to balance coverage and power consumption.
2Use of energy by stationary object
If the NR base station enters energy-saving state to reduce power consumption, then energy efficiency is improved, but service interruptions occur affecting user experience
Solution Approach 1:
Before the base station enters energy-saving mode, the network pre-configures neighboring cells to prepare for potential handovers. This preliminary action ensures that when the base station reduces power consumption, users can be seamlessly handed over to neighboring cells without service interruption, thus maintaining reliability while improving energy efficiency.
Solution Approach 2:
The network acts as an intermediary by managing the handover process between the base station in energy-saving mode and neighboring cells. This intermediary control ensures that service continuity is maintained during the transition, resolving the contradiction between energy efficiency and service reliability.
3Ease of operation
If the NR base station transmits common signals continuously, then service availability is maintained, but power consumption remains high even during idle periods
Solution Approach 1:
Instead of continuous transmission, the base station adopts periodic action by transmitting common signals only when necessary. During energy-saving mode, the base station transmits synchronization signals and system information blocks periodically or on-demand rather than continuously, reducing power consumption while maintaining essential service availability.
Solution Approach 2:
The system extracts and separates the transmission of common signals from continuous operation. In energy-saving mode, only essential common signals (synchronization signals and minimum system information) are transmitted, while other data transmissions are suspended or reduced, thus reducing power consumption while maintaining basic service availability.
Data Source
AI summary
An apparatus for receiving a common signal, applicable to a terminal equipment includes processor circuitry configured to perform: receiving master information block (MIB) information and/or system information block (SIB) information of one or more second cells transmitted by a first cell; detecting a reference signal of the second cell; and obtaining synchronization with the second cell via the detected reference signal of the second cell.