Zero-Power Wireless Communication with Scheduled Harvesting Windows
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Solution Overview
Problem
Zero-power devices face challenges in ensuring reliable communication due to the uncertainty of their power state, as they cannot perform power harvesting and communication simultaneously, leading to inefficiencies and resource wastage in traditional blind transmission and reception modes.
Innovation Solution
A method and device that utilize a preset time-domain resource for communication, where power is harvested separately from the communication process, allowing devices to switch between power harvesting and communication states, ensuring explicit time-domain resources are available for communication, thereby reducing power and resource wastage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If zero-power devices use blind transmission and reception modes, then communication can be attempted, but power and resources are wasted due to uncertainty of power state and inability to perform power harvesting and communication simultaneously
Solution Approach 1:
The patent applies preliminary action by having devices perform power harvesting in advance during designated time periods before communication occurs. The first device harvests power during a first time-domain resource period, and the second device harvests power during a second time-domain resource period, ensuring sufficient power is stored before actual communication takes place. This eliminates the uncertainty of power state during communication and prevents power wastage by ensuring power is ready when needed.
Solution Approach 2:
The patent segments the time-domain resources into distinct periods: first time-domain resources for the first device to harvest power, second time-domain resources for the second device to harvest power, and third time-domain resources for actual communication. This temporal segmentation allows power harvesting and communication to occur in separate, non-overlapping intervals, resolving the contradiction between needing power for communication and the inability to harvest power simultaneously.
2Quantity of substance
If zero-power devices harvest power continuously, then power storage increases, but communication efficiency decreases due to unavailable time for data transmission
Solution Approach 1:
The patent implements periodic action by establishing regular cycles where devices alternate between power harvesting phases and communication phases. The first device harvests power during first time-domain resources, the second device harvests during second time-domain resources, and communication occurs during third time-domain resources. This periodic structure ensures both devices accumulate sufficient power storage while maintaining high communication efficiency during dedicated transmission windows.
Solution Approach 2:
The patent applies dynamics by making the time-domain resource allocation flexible and adaptive. The network device dynamically configures and notifies devices about the specific time-domain resources for power harvesting and communication based on current system conditions, device power states, and communication requirements. This dynamic adjustment optimizes both power storage accumulation and communication efficiency without fixed rigid constraints.
3Loss of energy
If zero-power devices switch between power harvesting and communication states, then power and resource wastage reduces, but device complexity increases due to state management requirements
Solution Approach 1:
The patent employs feedback mechanisms where devices report their power harvesting status and communication requirements to the network device. The network device receives this feedback and uses it to intelligently configure and adjust the time-domain resources for power harvesting and communication. This feedback loop enables efficient state management that reduces power and resource wastage while keeping device complexity manageable, as the network device handles much of the coordination burden.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables reliable communication between zero-power devices and other devices by ensuring explicit time-domain resources are available, reducing power and resource wastage, and improving communication efficiency and reliability.
Implementation Method 1
a power for the communication is obtained by the first device through the power harvesting
Implementation Method 2
The first device performs the communication with a second device based on a first time-domain resource
Data Source
AI summary
A method for wireless communication applied to a first device is provided. The first device does not simultaneously perform a power harvesting and a communication. The method includes that: the first device performs the communication with a second device based on a first time-domain resource, where the first time-domain resource is a preset time-domain resource, and a power for the communication is obtained by the first device through the power harvesting. Communication devices are also provided.