Wireless Communication Device Beamforming Power Transfer
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Solution Overview
Problem
Bluetooth Low Energy (BLE) communication devices face inefficiencies in power transfer due to the use of narrow band frequency channels, which limits the effective transfer of power using wide band signals.
Innovation Solution
A wireless communication system that employs a communicator using a plurality of first frequency channels, with a transmitter sending signals through a second frequency channel of larger bandwidth, and controlling circuitry that selects a first frequency channel for channel estimation and directsivity control based on acquired channel information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a narrow band frequency channel is used for BLE communication, then communication compatibility is maintained, but power transfer efficiency deteriorates
Solution Approach 1:
The patent segments the frequency spectrum into multiple narrow band BLE channels (first frequency channels) and a wide band channel (second frequency channel). The system performs channel estimation on the narrow band channels for communication purposes, then uses this information to control directivity for wide band power transfer, effectively separating communication and power transfer functions across different frequency segments.
Solution Approach 2:
The patent makes the narrow band channel estimation results serve dual purposes: maintaining BLE communication compatibility and enabling wide band power transfer through directivity control. The channel information acquired from narrow band channels is reused for calculating directivity control signals, allowing the same communication infrastructure to support both communication and power transfer functions.
2Loss of energy
If a wide band signal is used for power transfer, then power transfer efficiency improves, but compatibility with BLE narrow band channels deteriorates
Solution Approach 1:
The patent uses narrow band channel estimation results as an intermediary to enable wide band power transfer. The channel estimation performed on narrow band BLE channels serves as a mediator that provides channel state information, which is then used to calculate directivity control signals for wide band power transfer, bridging the gap between narrow band communication and wide band power transfer requirements.
Solution Approach 2:
The patent changes the bandwidth parameter from narrow band (for communication) to wide band (for power transfer) while maintaining compatibility through directivity control. By adjusting the bandwidth utilization based on channel estimation results and applying directivity control, the system transitions from narrow band communication mode to wide band power transfer mode, optimizing power transfer efficiency while maintaining BLE compatibility.
3Reliability
If channel estimation is performed on each narrow band channel, then communication quality is maintained, but system complexity increases
Solution Approach 1:
The patent makes the channel estimation process serve dual functions: ensuring communication quality on narrow band channels and providing channel state information for wide band power transfer. The same channel estimation results are reused for both communication quality assurance and directivity control calculation, eliminating the need for separate estimation processes and reducing overall system complexity.
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
Enables efficient power transfer to BLE terminals by using beamforming and directivity control, allowing simultaneous BLE communication and wireless power transfer.
Implementation Method 1
The transmitter transmits a signal using a second frequency channel whose bandwidth is larger than that of each of the plurality of first frequency channels
Implementation Method 2
uses the selected first frequency channel to perform channel estimation, thereby acquiring first channel information representing a state of the selected first frequency channel
Implementation Method 3
calculates second channel information representing a state of the second frequency channel on a basis of the first channel information and control a directivity of the signal on a basis of the second channel information
Data Source
AI summary
According to one embodiment, a wireless communication device includes a communicator, a transmitter and controlling circuitry. The communicator is communicable using a plurality of first frequency channels. The transmitter transmits a signal using a second frequency channel having a bandwidth larger than that of each of the plurality of first frequency channels. The controlling circuitry selects the first frequency channel, of the plurality of first frequency channels, belonging to a band of the second frequency channel and uses the selected first frequency channel to perform channel estimation to acquire first channel information representing a state of the selected first frequency channel. The controlling circuitry calculates second channel information representing a state of the second frequency channel on a basis of the first channel information and control a directivity of the signal on the basis of the second channel information.