UE Wake-Up Scheduling for Low-Power Distributed Computing
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Solution Overview
Problem
User equipment (UE) in wireless communication networks consumes excessive power when actively monitoring communication channels for Mobile Terminated (MT) communications, such as receiving computation results from network nodes, due to the uncertainty of transmission times.
Innovation Solution
The UE determines a wakeup time based on expected response times and enters a power-saving mode until then, reducing channel monitoring to conserve power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE actively monitors communication channels for extended periods to receive task results from network nodes, then the reliability of receiving responses is improved, but the power consumption increases significantly
Solution Approach 1:
The UE transitions from continuous channel monitoring to periodic monitoring by entering sleep modes between expected response times. The UE wakes up at specific intervals to monitor for responses and returns to sleep mode otherwise, converting continuous action into periodic action to reduce power consumption while maintaining response reception capability.
Solution Approach 2:
The UE determines expected response times in advance based on task submission timing and notifies the network node beforehand. This preliminary planning allows the UE to schedule its wake-up times proactively rather than continuously monitoring, enabling power-saving operations while ensuring timely response reception.
2Loss of energy
If the UE enters power-saving mode to reduce power consumption, then the energy efficiency is improved, but the channel monitoring capability is reduced
Solution Approach 1:
The network node provides feedback to the UE about task completion status and expected response timing. This feedback mechanism allows the UE to synchronize its wake-up times with actual response availability, ensuring it monitors the channel only when responses are expected while maintaining reliable reception capability.
Solution Approach 2:
The UE calculates and determines expected response times in advance before entering power-saving mode. This preliminary determination ensures the UE wakes up at optimal times to receive responses, maintaining monitoring capability when needed while maximizing power-saving opportunities.
3Loss of time
If the UE continuously monitors the communication channel to ensure timely receipt of responses, then the response time is reduced, but the power consumption increases
Solution Approach 1:
The UE determines expected response times in advance based on task submission timing and notifies the network node beforehand. This allows the UE to schedule precise wake-up times, ensuring rapid response reception without continuous monitoring, thus reducing both response time and power consumption.
Solution Approach 2:
The UE adopts periodic wake-up cycles aligned with expected response times rather than continuous monitoring. This periodic action maintains fast response capability at predetermined moments while allowing power-saving sleep modes during intervals, effectively balancing response time and power consumption.
Data Source
AI summary
A processor has circuitry that executes instructions to cause a user equipment (UE) to perform operations. The operations include determining to offload a task to a network node. The operations include transmitting an offload request to the network node, wherein the offload request comprises a size of an expected response and a latest receipt time. The operations include determining a wakeup time that is earlier than the latest receipt time. The operations include entering a power-saving mode until the wakeup time. The operations include exiting the power-saving mode at the wakeup time. The operations include monitoring a communication channel for the expected response from the network node until the latest receipt time. Also disclosed are a UE and a method.