BLE Advertisement Packet Transmission with Dynamic Frequency Band Switching
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Solution Overview
Problem
The increase in data volume within Bluetooth Low Energy (BLE) advertisement packets leads to increased power consumption, making it challenging to maintain ultra-low power consumption, especially when there are no receiving devices in the vicinity.
Innovation Solution
A communication device that uses two frequency bands for advertisement packet transmission: a first frequency band for small data and a second frequency band for larger data, switching to the second band only upon receiving a request signal from a potential receiver, allowing for efficient large-volume data transmission while minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the data size in advertisement packets is increased to transmit more information, then the information transmission capability is improved, but the power consumption increases and ultra-low power consumption cannot be realized
Solution Approach 1:
The patent applies dynamics by making the advertisement packet size adjustable rather than fixed. The communication device dynamically changes the data size of advertisement packets based on whether a request signal is received. When no requests are received, smaller packets are transmitted to save power; when requests are received, larger packets are transmitted to provide more information, thus resolving the contradiction between information transmission capability and power consumption.
2Loss of information
If advertisement packets are transmitted continuously to ensure information availability, then the information accessibility is improved, but unnecessary power consumption occurs when no receiving devices are present
Solution Approach 1:
The patent implements feedback by monitoring whether request signals are received from scanning devices. Based on this feedback information, the communication device adjusts its advertisement packet transmission strategy. When request signals are received, the device transmits larger advertisement packets with more information; when no requests are received, it transmits smaller packets to reduce power consumption, thus eliminating wasteful energy consumption while maintaining information accessibility when needed.
Data Source
AI summary
The present invention, when it is estimated that a device that can receive a large-sized advertisement is present within a communication area, transmits advertisement packets of that size. A communication device of this invention comprises a first transmission unit that transmits a first advertisement packet, using a first frequency band, a determination unit that, upon receiving a request packet in response to the first advertisement packet, determines whether or not an external device that can receive the second advertisement packet whose size is larger than that of the first advertisement packet is present within a communication area, based on the request packet, and a second transmission unit that, if the determination result indicates the presence, transmits a second advertisement packet, using a second frequency band different from the first frequency band.