LP-WUS Cell Selection for Low-Power Terminal Access
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, terminal devices may fail to utilize low power wake up signals (LP-WUS) to conserve energy when they are not deployed in certain cells, leading to inefficiencies in power consumption.
Innovation Solution
Terminal devices determine indication information from downlink signals to identify cells where LP-WUS is configured, allowing them to camp on and utilize these signals to save energy, even if LP-WUS is not initially deployed in their current cell, and adjust access strategies to reduce congestion and access delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If LP-WUS is deployed in only part of cells, then network resource consumption is reduced, but terminal devices cannot use LP-WUS to save energy when camping on cells without LP-WUS
Solution Approach 1:
The patent introduces downlink signals as intermediaries that carry indication information about LP-WUS configuration. Terminal devices use these downlink signals to determine whether LP-WUS is available in a cell, enabling them to adapt their behavior accordingly. This intermediary mechanism resolves the contradiction by allowing terminal devices to access LP-WUS benefits even when not directly configured in their current cell.
Solution Approach 2:
The network device performs preliminary action by configuring and deploying LP-WUS in specific cells before terminal devices need to access them. The downlink signals are transmitted in advance to inform terminal devices about LP-WUS availability, enabling terminal devices to camp on appropriate cells and utilize LP-WUS for energy saving before actual communication begins.
2Loss of energy
If terminal devices camp on cells with LP-WUS to save energy, then power consumption is reduced, but access congestion and access delay increase
Solution Approach 1:
The patent applies local quality by allowing different cells to have different LP-WUS configuration statuses. Terminal devices make local decisions based on downlink signal indications to determine whether to camp on a cell with LP-WUS or proceed directly to access. This localized adaptation enables energy saving where LP-WUS is available while avoiding congestion in cells where it is not.
Solution Approach 2:
The patent introduces dynamic behavior where terminal devices adjust their camping and access strategies based on real-time downlink signal indications. The decision-making process is dynamic: terminal devices monitor downlink signals, determine LP-WUS availability, and adapt their actions accordingly. This dynamic approach allows terminal devices to balance energy saving with access efficiency based on current network conditions.
Data Source
AI summary
This application provides a communication method, a terminal device, and a network device. In this application, when a low power wake up signal (LP-WUS) is deployed in a part of cells, the terminal device can use the LP-WUS to save energy. The method is applied to a first terminal device, and the first terminal device is in a radio resource control non-connected state. The method includes: The first terminal device receives, in a first cell, a first downlink signal from a first network device, where the first cell corresponds to a first frequency position; and then the first terminal device determines first indication information based on the first downlink signal, where the first indication information indicates a second frequency position, an LP-WUS is configured in a cell corresponding to the second frequency position, and the second frequency position is different from the first frequency position.