Base Station Wake-Up Signal for 5G Power Optimization
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing power consumption and transitioning between dormant and active modes in base stations, particularly in 5G NR networks, leading to high operational costs and environmental impact due to increased energy usage.
Innovation Solution
Implementing a method where user equipment (UE) transmits a wake-up signal (WUS) to base stations during configured WUS occasions, allowing the base stations to switch from dormant to active mode only when necessary, thereby optimizing power consumption by reducing the number of active antenna ports and adjusting transmission frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If base stations operate continuously in active mode to ensure immediate communication availability, then communication reliability is improved, but power consumption increases
Solution Approach 1:
The base station dynamically transitions between dormant and active modes based on communication needs. The system adjusts its operational state in real-time, switching from a low-power dormant state to a high-performance active state when communication is required, and back to dormant when idle, thereby optimizing the trade-off between reliability and power consumption
Solution Approach 2:
The base station employs periodic wake-up signals to transition from dormant to active mode. Instead of remaining continuously active, the system uses periodic activation triggered by WUS occasions, allowing it to maintain communication availability while significantly reducing overall power consumption through intermittent operation
2Use of energy by moving object
If base stations transition to dormant mode to reduce power consumption, then energy efficiency is improved, but communication response time increases
Solution Approach 1:
The system prepares for potential communication needs by establishing pre-configured WUS occasions and resources in advance. When communication is required, the UE can immediately transmit a WUS without needing to establish new connections or wait for base station availability, thereby reducing response time while maintaining energy efficiency
Solution Approach 2:
The system uses feedback mechanisms where the UE monitors for WUS occasions and transmits wake-up signals when communication is needed. The base station responds to these feedback signals by transitioning to active mode, creating a responsive loop that balances energy savings with communication responsiveness
3Use of energy by moving object
If base stations reduce the number of active antenna ports to save power, then power consumption decreases, but spectral efficiency deteriorates
Solution Approach 1:
The base station dynamically adjusts the number of active antenna ports based on operational mode. In dormant mode, fewer antenna ports are active to reduce power consumption. When transitioning to active mode upon receiving a WUS, the base station activates additional antenna ports to restore full spectral efficiency and communication capability
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit a wake up signal (WUS) to a base station in a WUS occasion that is configured for the WUS. The UE may transmit a communication to the base station after transmitting the WUS. Numerous other aspects are described.