Communication Using Bluetooth; Piconet; Frequency Hopping Spread Spectrum (Fhss) - Ricoh G092 Service Manual

BLUETOOTH (WIRELESS)

6.9.3 COMMUNICATION USING BLUETOOTH

Piconet

Bluetooth devices communicate with each other device in the ad hoc mode. This
network is called a "Piconet." A Piconet may contain a maximum of 8 Bluetooth
devices.
There is one master device and seven slave devices in a Piconet. The master
device controls the hopping frequency and timing, as well as storing the ID codes
of the slave devices. The master and slave devices can be swapped. Once the
master device leaves the Piconet, one of the slave device then becomes the new
master.
Machines with the Bluetooth option become potential slave devices to connect to
the PC.

Frequency Hopping Spread Spectrum (FHSS)

The Bluetooth device divides 2402 to 2480 MHz into 79 channels of 1 MHz width,
and changes the channel 1600 times per second. If other devices in the LAN are
using the same radio band, Bluetooth can avoid interference from the other devices.
Time
Channel 3
Channel 1 Channel 2
G081D925.WMF
SM 6-67 G081/G092