Wakeup Radio Signaling for UE Sleep and Wake Mode Coordination
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing power consumption and communication performance due to the lack of coordination between different sleep and wakeup modes of user equipment (UE) and network nodes, leading to increased power consumption and potential communication failures.
Innovation Solution
The implementation of a low-power wakeup radio (LP-WUR) and associated signaling mechanisms that allow UE to transmit capability information for supported sleep and wakeup modes, enabling network nodes to configure optimal wakeup procedures through LP-WUS, thereby coordinating power-saving operations without degrading communication performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the main radio is frequently activated to ensure communication responsiveness, then communication performance is improved, but power consumption increases
Solution Approach 1:
The radio system is segmented into two independent radios: a main radio for high-performance communication and a wakeup radio for low-power monitoring. This segmentation allows each radio to operate independently according to its specific function, enabling the main radio to remain in sleep mode while the wakeup radio monitors for activation signals, thus resolving the contradiction between communication responsiveness and power consumption.
Solution Approach 2:
The wakeup radio acts as an intermediary between the sleep state and active communication state. It monitors for wakeup signals and triggers main radio activation only when necessary, serving as a mediator that reduces unnecessary main radio activations while maintaining communication responsiveness. The intermediary wakeup radio enables smooth transitions between power states without compromising communication performance.
2Use of energy by moving object
If the main radio remains in sleep mode to save power, then power consumption is reduced, but communication responsiveness deteriorates
Solution Approach 1:
The wakeup radio performs preliminary monitoring actions while the main radio is in sleep mode. It continuously or periodically checks for wakeup signals in advance, so when a signal is detected, the main radio can be immediately activated without delay. This preliminary action by the wakeup radio ensures communication responsiveness is maintained while the main radio remains in low-power state.
Solution Approach 2:
The system dynamically switches between different operational states based on traffic conditions and signal detections. The wakeup radio can adjust its monitoring behavior (continuous vs. periodic) based on power availability and traffic patterns, while the main radio dynamically transitions between sleep and active states. This dynamic adaptation resolves the contradiction by optimizing the balance between power consumption and responsiveness in real-time.
3Adaptability or versatility
If capability information signaling is comprehensive to support all sleep and wakeup modes, then adaptability is improved, but signaling overhead increases
Solution Approach 1:
Different levels of capability information are signaled based on the specific operational context and requirements. Rather than always signaling complete capability sets, the system signals only the relevant capability information needed for current operations. This local quality approach allows comprehensive mode support when needed while reducing signaling overhead in scenarios with simpler requirements.
Solution Approach 2:
The capability information signaling framework is designed to be universal, supporting multiple sleep and wakeup modes through a unified signaling structure. The same signaling mechanism can accommodate different radio configurations, sleep durations, and wakeup trigger types, eliminating the need for separate signaling for each mode and thereby reducing overall signaling overhead while maintaining comprehensive adaptability.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit, to a network node, capability information for a wakeup procedure associated with a main radio of the UE, the capability information being associated with at least one of one or more sleep modes supported by the UE or one or more wakeup modes supported by the UE. The UE may receive, from the network node, configuration information for the wakeup procedure, the configuration information being based on the capability information. Numerous other aspects are described.