Multi-Link Wake-Up Signal for Power Reduction
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Solution Overview
Problem
Multi-link communication devices face high power consumption, which can lead to inefficiencies in scenarios requiring power saving modes or low performance levels, such as in low traffic situations, where the benefits of multi-link communication are not immediately suitable or beneficial.
Innovation Solution
A method for a radio access node to determine and select suitable links for data transmission, sending a wake-up signal to the user device, and using wake-up radio technology to efficiently wake up only the necessary receivers, reducing power consumption without substantial degradation in latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-link communication is used with multiple receivers, then throughput and performance are improved, but power consumption increases
Solution Approach 1:
The system dynamically adjusts the number of active receivers based on traffic conditions and link quality. Receivers can be activated or deactivated on demand, transitioning between sleep and active states to match actual communication needs, thereby optimizing the balance between throughput and power consumption
Solution Approach 2:
The patent changes the operational parameters of receivers by adjusting their activity states. By modifying parameters such as receiver activation status, traffic load thresholds, and link quality metrics, the system adapts power consumption levels to match actual performance requirements
2Loss of time
If all receivers are kept active for multi-link communication, then latency is reduced, but power consumption increases
Solution Approach 1:
The system performs preliminary assessment of traffic conditions and link quality before activating receivers. By evaluating whether traffic thresholds are met and whether multi-link communication is beneficial in advance, the system avoids unnecessary receiver activation, reducing power consumption while maintaining low latency when needed
Solution Approach 2:
The system autonomously determines when to activate or deactivate receivers based on monitored traffic conditions and link quality metrics. This self-service mechanism eliminates the need for continuous high-power operation by having the system itself manage its power state based on actual communication demands
3Use of energy by moving object
If wake-up radio is used to reduce power consumption, then energy efficiency is improved, but device complexity increases
Solution Approach 1:
The communication system is segmented into distinct functional components: a wake-up radio for low-power monitoring and main receivers for full communication. This segmentation allows the wake-up radio to handle power management functions separately from the main communication receivers, reducing overall power consumption while adding a manageable level of complexity through functional separation
Data Source
AI summary
A method for a radio access node configured for transmission to a user device over multiple links. The method includes, responsive to data being available for transmission to the user device, determining which of the multiple links are possible links for transmission of the data, selecting one or more links of the possible links, and transmitting a wake-up signal to the user device, wherein the wake-up signal is indicative of the selected one or more links. A method is also disclosed for a user device configured for reception from a radio access node over multiple links. The method includes receiving a wake-up signal from the radio access node, wherein the wake-up signal is indicative of one or more of the multiple links, and waking up one or more of the multiple receivers, corresponding to the indicated one or more links.