The BluFax Concept
What is Bluetooth?
Bluetooth is a telecommunications industry specification that defines the manner in which mobile phones, computers, personal digital assistants, car radios, and other digital devices can be interconnected using short-range wireless communications. Bluetooth uses a low cost transceiver chip to exchange information with other Bluetooth devices within a globally available frequency band of 2.45 GHz.
Bluetooth transceivers that are powered on and are set in the "discover" mode continuously transmit their 48-bit ID (address) for the purpose of identifying a device to communicate with, and to establish a link with the “responding devices”. This process is continuous and will transmit inquiries even if, for example, someone is talking on a mobile phone using a head set.
Every Bluetooth device has a unique 48-bit address that may look like this: OO:18:AF:4B:56:BD. The first half of the number (00:18:AF) is assigned by the manufacturer. The second half of the number (4B:56:BD) is associated with that device. This information is not stored in accessible databases. While device IDs are unique, BluFAX units collect no personal information as part of this process [More information on Privacy Issues]. .
Each BluFAX contains GPS and synchronizes with a common time reference.
Traveltimes and space mean speed are calculated by BluSTATS software by detecting the signals of common IDs at two locations and subtracting the times of detection.