Bluetooth

This chapter summarizes the physical properties of Bluetooth and the protocol stack. It describes relevant Bluetooth profiles and how they are used in practice in a wide range of applications and scenarios. Bluetooth 1.2 introduces a method called Adaptive Frequency Hopping (AFH). If all devices in a piconet are Bluetooth 1.2 compatible, the master device performs a channel assessment to measure the interference encountered on each of the 79 channels. The link manager uses this information to create a channel bitmap and marks each channel that is not to be used for the frequency‐hopping sequence of the piconet. As Bluetooth radiowaves do not stop at the doorstep, the Bluetooth standard specifies a number of security functions. With version 2.1 of the Bluetooth standard, the new pairing mechanisms were introduced in the chapter.