Passive IoT UE Scheduling Using Energy Harvesting Capability Reports
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Solution Overview
Problem
Existing UE scheduling methods in 5G communication systems do not effectively account for the intermittently available energy in passive IoT devices, leading to inefficiencies in energy utilization and potential unfairness in scheduling.
Innovation Solution
A solution where terminal devices report their energy harvesting capability to network devices, indicating a first energy value collected during a specific time interval and a second energy value averaged over a longer interval, allowing the network device to allocate scheduling information based on this energy harvesting capability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing UE scheduling methods are used without energy harvesting information, then scheduling simplicity is maintained, but energy utilization efficiency deteriorates and fairness among devices is compromised
Solution Approach 1:
The terminal device performs preliminary measurement of energy harvesting capability before communication scheduling. The device calculates energy values during specific time intervals (ΔEt during Δt and EAvg averaged over N×Δt) and reports these pre-computed values to the network device. This preliminary action allows the network device to make informed scheduling decisions without performing complex real-time energy calculations, thus improving energy utilization efficiency while maintaining scheduling system simplicity.
2Reliability
If energy harvesting capability reporting is implemented, then scheduling fairness among devices is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts only the essential energy harvesting capability parameters (ΔEt and EAvg) from the complete energy information set and reports them separately from other uplink data. By taking out only the critical scheduling-relevant energy values rather than reporting all energy details, the system achieves improved scheduling fairness while minimizing the increase in signaling overhead.
3Reliability
If energy values are averaged over longer time intervals, then scheduling fairness is improved, but responsiveness to current energy availability deteriorates
Solution Approach 1:
The patent segments the energy time scale into two distinct intervals: a short interval Δt for measuring instantaneous energy harvesting rate (ΔEt) and a longer interval N×Δt for measuring average energy (EAvg). This segmentation allows the network device to use ΔEt for rapid scheduling decisions that require responsiveness to current energy availability, while simultaneously using EAvg to ensure fairness by considering sustained energy harvesting capability over longer periods.
Data Source
AI summary
Embodiments of the present disclosure relate to devices, methods, apparatuses and computer readable storage media of energy harvesting information supported User Equipment (UE) scheduling. The method includes reporting, to a network device in the radio network, energy harvesting capability of the terminal device indicating a first energy value (ΔEt) collected during a first time interval (Δt) and a second energy value (EAvg) averaged over a second time interval; and communicating with the network device to transmit data according to scheduling information received from the network device and determined based on the energy harvesting capability of the terminal device. In this way, the terminal device may be scheduled by the network based on its energy harvesting capability, to maintain a trade-off between harvested energy utilization and fairness in scheduling from Passive IoT UEs.