Base Station Wake-Up Receiver for On-Demand Cell Energy Saving
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Solution Overview
Problem
The increasing number of connected devices in 5G and 6G communication systems necessitates methods to reduce energy consumption in base stations, particularly in intelligent services such as smart homes, smart buildings, and connected cars, where existing technologies are inefficient in managing energy usage.
Innovation Solution
Implementing a wake-up receiver (WUR) in base stations to activate on-demand cells through wake-up signals (WUS) and configuring cells with different functions for energy-saving, sharing components with the main radio receiver to reduce overhead and manage energy more efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If base stations activate all cells continuously to handle increasing connected devices, then service support and performance requirements are met, but energy consumption increases
Solution Approach 1:
The base station dynamically adjusts cell activation status based on real-time traffic conditions and service requirements. Cells are activated only when needed for specific services (eMBB, URLLC, mMTC) and deactivated when not required, transforming the static cell activation approach into a dynamic one that adapts to changing network conditions, thereby reducing energy consumption while maintaining service capability.
Solution Approach 2:
Different cells are configured with different functions and activation characteristics based on their specific roles in the network. Some cells are designated for specific service types (e.g., URLLC cells, mMTC cells) and are activated selectively based on local service demands rather than uniformly activating all cells, allowing energy-saving measures to be applied locally where appropriate while maintaining service quality where needed.
2Use of energy by moving object
If base stations deactivate cells to save energy, then energy consumption reduces, but service availability and response time deteriorate
Solution Approach 1:
The base station performs preliminary configuration of cells with specific service capabilities and maintains them in a low-power ready state. When service requests arrive, pre-configured cells can be rapidly activated without full initialization delays, ensuring service availability is maintained while energy is saved during inactive periods. This preliminary preparation allows fast response when services are needed.
Solution Approach 2:
The system implements feedback mechanisms that monitor service requests, traffic patterns, and cell performance metrics. Based on this feedback, the base station makes informed decisions about cell activation and deactivation, ensuring that cells are kept active when service availability is critical and deactivated when service demands are low, thus balancing energy savings with service reliability.
3Adaptability or versatility
If base stations use traditional cell activation methods, then service coverage is maintained, but device complexity and overhead increase
Solution Approach 1:
The base station segments cells into different functional categories (e.g., coverage cells, capacity cells, service-specific cells) with distinct activation criteria and control mechanisms. This segmentation allows independent management of different cell types based on their specific purposes, reducing the complexity of managing all cells uniformly while maintaining comprehensive service coverage through coordinated activation of appropriate cell segments.
Data Source
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AI summary
The present disclosure relates to a 5G or 6G communication system for supporting higher data transmission rates. A method performed by a base station in a communication system according to an embodiment of the present disclosure may comprise the steps of: transmitting information related to one or more second cells via a first cell; receiving at least one uplink (UL) wake-up signal (WUS) via the one or more second cells; determining the activation of at least one second cell among the one or more second cells; and performing communication via the at least one activated second cell.