Ambient Power Channel Discovery for Battery-Free IoT Access
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Solution Overview
Problem
Existing technologies face challenges in discovering and providing stable power to ambient power devices in wireless local area networks, particularly for battery-free and low-cost IoT devices, leading to inefficiencies in power consumption and communication accessibility.
Innovation Solution
Implementing methods for ambient power stations and access points to transmit and receive discovery and power supply signals on preset channels, reducing blind detection and optimizing power harvesting through specific frequency bands and channels, ensuring efficient communication accessibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ambient power devices perform blind detection across all channels to discover power supply signals, then discovery completeness is improved, but power consumption and detection delay increase
Solution Approach 1:
The patent applies preliminary action by pre-configuring ambient power devices with a preset channel list before operation. The device receives the channel list from the network and stores it locally, so that when power supply signal detection is needed, the device can directly monitor the preset channels without performing blind detection across all channels. This preliminary preparation significantly reduces power consumption while ensuring reliable discovery of power supply signals.
Solution Approach 2:
The patent segments the entire channel spectrum into multiple discrete channels and identifies a specific subset (preset channels) where power supply signals are likely to occur. Instead of monitoring all channels continuously, the system divides the search space into manageable segments (preset channels) based on network configuration, allowing the ambient power device to focus its detection efforts on relevant channels only, thereby reducing power consumption while maintaining discovery effectiveness.
2Reliability
If ambient power devices monitor all channels continuously to ensure reliable power supply discovery, then detection reliability is improved, but detection delay increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring ambient power devices with a preset channel list before operation. The device receives the channel list from the network and stores it locally, so that when power supply signal detection is needed, the device can directly monitor the preset channels without performing blind detection across all channels. This preliminary preparation significantly reduces power consumption while ensuring reliable discovery of power supply signals.
Solution Approach 2:
The patent applies skipping by allowing the ambient power device to skip over channels that are not in the preset channel list. Instead of methodically checking every channel in sequence (which would cause detection delay), the device jumps directly to the preset channels where power supply signals are expected to be found, thereby rushing through the detection process efficiently while maintaining reliability.
3Adaptability or versatility
If ambient power devices use broad spectrum detection to discover power supply signals, then discovery capability is improved, but power consumption increases
Solution Approach 1:
The patent applies local quality by making the detection capability localized to specific channels rather than distributing it uniformly across all channels. The preset channel list identifies specific locations (channels) where power supply signals are likely to be present, allowing the ambient power device to concentrate its detection resources locally on these channels. This localized approach maintains effective discovery capability while significantly reducing overall power consumption compared to broad spectrum detection.
Solution Approach 2:
The patent applies preliminary action by pre-configuring ambient power devices with a preset channel list before operation. The device receives the channel list from the network and stores it locally, so that when power supply signal detection is needed, the device can directly monitor the preset channels without performing blind detection across all channels. This preliminary preparation significantly reduces power consumption while ensuring reliable discovery of power supply signals.
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 enhances the discovery and power supply process for ambient power devices, reducing power consumption and detection delays, thereby ensuring stable and reliable operation of battery-free IoT devices.
Implementation Method 1
transmitting, by an ambient power access point, a discovery signal to an ambient power station on at least one channel that is preset
Implementation Method 2
receiving, by an ambient power station, a power supply signal on at least one channel that is preset
Data Source
AI summary
A wireless communication method includes: receiving, by an ambient power station, a discovery signal on at least one channel that is preset.