Low-Power Wake-Up Signaling for Reliable Wireless Communication
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Solution Overview
Problem
Existing 5G communication systems face challenges in optimizing low power signals for efficient energy conservation and battery life in devices, particularly in scenarios requiring intermittent data transmission, where detailed configurations of low power signals are still under discussion.
Innovation Solution
The implementation of low power wake-up signals (LP-WUS), low power synchronization signals (LP-SS), and physical downlink control channels (PDCCH) to manage energy-efficient device activation and communication, utilizing various signal formats, modulation methods, and multiplexing techniques to balance signaling overhead and transmission reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If low power signals are used to conserve battery life, then energy efficiency is improved, but signaling overhead and transmission reliability deteriorate
Solution Approach 1:
The patent segments the signal transmission process into distinct phases: a low power wake-up signal (LP-WUS) for initial activation and a full PDCCH for subsequent control information. This segmentation allows the device to use minimal power for wake-up while maintaining reliable communication through the full channel for actual data transmission, resolving the contradiction between energy efficiency and transmission reliability.
Solution Approach 2:
The patent implements dynamic signal selection where the network node determines whether to transmit only an LP-WUS or both LP-WUS and PDCCH based on transmission requirements. This dynamic approach allows the system to adapt between power conservation mode (LP-WUS only) and reliable transmission mode (both signals), balancing energy efficiency and reliability according to actual needs.
2Use of energy by moving object
If low power signals are used to conserve battery life, then energy efficiency is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts the essential wake-up function from the full PDCCH and implements it separately as an LP-WUS. This extraction allows the system to use minimal signaling overhead for wake-up purposes while avoiding the need to transmit complete control information at low power, thus resolving the contradiction between energy efficiency and signaling overhead.
Solution Approach 2:
By segmenting the control channel into an optional LP-WUS component and a mandatory PDCCH component, the system can transmit only the necessary wake-up signal when power conservation is the priority, reducing signaling overhead while maintaining the ability to provide full control information when needed.
3Use of energy by moving object
If detailed configurations of low power signals are implemented, then power efficiency is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by configuring the LP-WUS parameters (such as time resources, frequency resources, and signal characteristics) in advance through higher layer signaling before actual low power operation is needed. This preliminary configuration allows the device to operate efficiently during low power mode without requiring complex real-time decision-making, thus improving power efficiency while limiting the increase in device complexity to configuration setup time.
Data Source
AI summary
A wireless communication method is disclosed. The method comprises determining, by a first wireless communication node, one or more types of a low power, LP, signal according to information; and receiving, by the first wireless communication node from a second wireless communication node, the one or more types of the LP signal; and wherein the LP signal comprises at least one of a low power wake-up signal (LP-WUS), a low power synchronization signal (LP-SS), or a physical downlink control channel (PDCCH); or wherein the information comprises at least one of information configured by the second wireless communication node or information indicated by the LP signal.