U
SER
M
ANUAL
WRAP
P
RODUCT
S
ERIES
5 B
LUETOOTH TECHNOLOGY OVERVIEW
Link Controller (LC)
RF
RF
BaseBand
Logical Link Control and Adaption Protocol
(L2CAP)
SDP
RFCOMM
BGT Bluetooth API
PPP
TCP/IP
BT Lower
Layers
BT Upper
Layers
Link Manager Protocoll (LMP)
HCI driver
Physical Bus Driver
HCI Firmware
Profiles
Profiles
Wireless Applications
Wireless Applications
Figure 4. Bluetooth Software and Hardware Components.
5.1 F
REQUENCY
B
ANDS AND
C
HANNEL
A
RRANGEMENT
The Bluetooth system operates in the license-free 2.4 GHz ISM (Industrial Science Medial) band using
frequency hopping spread spectrum (FHSS). In the vast majority of countries around the world this
frequency band is 2400 – 2483.5 MHz. Some countries have, however, national limitations on the frequency
range. In order to comply with these national limitations, special frequency hopping algorithms have been
specified for these countries. It should be noted that products implementing the reduced frequency band will
not work with products implementing the full band. Products implementing the reduced frequency band must
therefore be considered local versions.
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