Most network protocols just provide channels between communicating entities and let applications designers figure out what they want to use them for. For example, 802.11 do not specify whether users should use their notebook computers for reading e-mail, surfing the Web or something else. In contrast, the Bluetooth V1.1 specifications names 13 specific applications to be supported and provides different protocol stacks for each one. Unfortunately, this approach leads to a very large amount of complexity, which we will omit here. The 13 applications, which are called profiles, are listed in following. By looking at them briefly now, we may some more clearly what the Bluetooth SIG is trying to accomplish. [Read more...]