Dormant Cell Wake-Up Signaling for Faster Reliable Access
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Network devices with dormant components face challenges in maintaining communication quality due to the need for terminals to detect synchronization signals and system information blocks, leading to failed connections when load increases, especially when base stations turn off components to conserve power.
Innovation Solution
A wake-up method where terminals actively send signals on configured resources to awaken dormant cells, using reference signal quality and path loss to select optimal cells for connection, reducing power consumption and improving communication reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If network devices turn off components to conserve power, then power consumption is reduced, but communication reliability deteriorates because terminals cannot establish connections to dormant cells
Solution Approach 1:
The patent applies preliminary action by having the terminal send a wake-up signal before the dormant cell needs to provide data transmission services. The network device receives this wake-up signal and transitions from dormant state to active state in advance, ensuring the cell is ready for communication when needed. This resolves the contradiction by enabling power saving while maintaining connection reliability through proactive wake-up mechanisms.
Solution Approach 2:
The wake-up signal acts as an intermediary mechanism between the terminal and the dormant cell. Instead of the terminal directly attempting to connect to a dormant cell (which would fail), the wake-up signal serves as a mediator that triggers the cell to become active first. This intermediary approach allows the system to achieve both power consumption reduction and communication reliability.
2Reliability
If terminals detect synchronization signals and system information blocks to establish connections, then connection establishment is achieved, but time consumption increases due to the detection and processing required
Solution Approach 1:
The wake-up signal is sent in advance by the terminal before the actual data transmission begins. This preliminary action allows the dormant cell to transition to active state beforehand, so when the terminal needs to communicate, the cell is already ready without requiring time-consuming synchronization signal detection and system information block processing. This significantly reduces the time consumption while maintaining reliable connection establishment.
3Loss of energy
If network devices maintain only basic synchronization signal sending in dormant state, then power consumption is reduced, but terminal access capability deteriorates because terminals cannot perform initial access
Solution Approach 1:
The system maintains basic synchronization signal sending in dormant state to preserve minimal functionality and enable cell identification, while introducing the wake-up signal mechanism as a preliminary action. When the terminal needs to access the network, it sends the wake-up signal which triggers the dormant cell to transition to active state and provide full services including initial access. This resolves the contradiction by maintaining ease of operation through the wake-up mechanism while keeping power consumption low during dormant state.
Data Source
AI summary
This application provides a wake-up method, an apparatus, and a system. The wake-up method is applicable to a multi-site shutdown scenario. The wake-up method includes: A terminal sends a wake-up signal to a cell to wake up the cell, for example, establishes a connection to the cell. In this way, the terminal completes a subsequent access process, and communicates with the cell, to avoid failure of the cell to communicate with the terminal in time after the cell enters a dormant state. The method can improve communication reliability, further improve access efficiency, and shorten an access latency.