Keep-Alive Signal for Wireless Energy Saving
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Solution Overview
Problem
Wireless communication networks face challenges in conserving energy while maintaining low connection latency, as cells in energy-saving mode require frequent keep-alive signals and synchronization signal block (SSB) transmissions, leading to unnecessary power consumption and potential latency issues when resuming operations.
Innovation Solution
A method where a base station transmits a keep-alive signal indicating energy-saving mode and an SSB burst set, allowing user equipment (UE) to adjust monitoring occasions and trigger SSB transmissions only when necessary, reducing unnecessary power consumption and latency by synchronizing with the keep-alive signal periodicity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If cells in energy-saving mode transmit frequent keep-alive signals and SSB transmissions, then connection latency is reduced, but power consumption increases
Solution Approach 1:
The base station dynamically adjusts its operational state between energy-saving mode and normal mode based on received triggering signals from UEs. When in energy-saving mode, the base station transmits periodic wake-up signals instead of full SSB bursts, and only transitions to normal mode upon receiving a triggering signal, thereby adapting transmission behavior to actual network conditions and reducing unnecessary power consumption.
Solution Approach 2:
The base station implements periodic wake-up signal transmissions at predetermined intervals while in energy-saving mode. This periodic action maintains basic network presence and allows UEs to periodically check for network availability without requiring continuous full-scale SSB transmissions, thus reducing power consumption while maintaining acceptable connection latency characteristics.
2Reliability
If base station transmits SSB burst set frequently, then synchronization is maintained, but energy consumption increases
Solution Approach 1:
The patent extracts the essential synchronization function from the full SSB burst transmission by implementing simplified wake-up signals that contain only the critical synchronization information needed. These wake-up signals carry minimal synchronization data compared to complete SSB bursts, allowing the base station to maintain basic synchronization reliability while dramatically reducing energy consumption during energy-saving mode.
Solution Approach 2:
The base station changes the transmission parameters of synchronization signals based on operational mode. In energy-saving mode, it transmits wake-up signals with reduced frequency, lower power, and simplified content compared to full SSB bursts. When transitioning to normal mode, it restores full SSB transmission parameters, thereby optimizing the balance between synchronization reliability and energy consumption through parameter adaptation.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a base station may transmit a keep-alive signal that indicates a presence of a cell in an energy saving mode. The base station may transmit a synchronization signal block (SSB) burst set based at least in part on the keep-alive signal. Numerous other aspects are described.