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Chapter 4: Bluetooth Profiles
These are the standards defined by Bluetooth SIG with each profile implementing only a set of stack protocols. These profiles aim to ensure interoperability between Bluetooth devices. Also, by choosing some of these profiles for a device, the production cost can be reduced.
There are nine application profiles and four system profiles. The system profiles share some functionality with some of the application profiles.
Figure 6: Bluetooth Profiles
A. Generic Access Profile
This system profile is the core of all other profiles, since it is responsible for device discovery and link maintenance.
B. Service Discovery Application Profile
This is another system profile that helps the Bluetooth device to discover other devices and applications supported by them, in the user vicinity by using the Service Discovery Protocol (SDP).
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C. Serial Port Profile
This system profile enables two Bluetooth devices to have a serial link, as if they are connected through a serial (RS-232 or USB) cable.
D. Generic Object Exchange Profile
This system profile is responsible for object exchange between Bluetooth devices.
E. Intercom Profile
Also referred to as Audio Gateway Profile, uses the microphone and speaker of two Bluetooth devices for direct voice communication. It is an application profiles.
F. Headset Profile
This application profile enables connection between Bluetooth enabled device (such as a laptop or mobile) and Bluetooth enabled headsets, using serial port profile.
G. Cordless Telephony Profile
This application profile facilitates a Bluetooth enabled phone to be used as a cordless, mobile phone or an intercom.
H. Object Push Profile
The ‘pushed’ data such as an advertisement or business card is managed by this application profile.
I. Dial up Networking Profile
This application profile also uses serial port profile, to provide dial up connection between public networks and Bluetooth enabled devices.
J. File Transfer Profile
The basic file operations are performed by this application profile. These operations include, downloading, uploading, and browsing etc however the access can be restricted by the host.
K. Fax Profile
This application profile uses serial port profile to enable computers to send fax using a Bluetooth device, such as a cellular phone as a gateway.
