The uppermost layer is the Application group that contains specific Bluetooth applications (for example, a networking application). The Bluetooth protocol stack, like all digital communications protocols, is made up of layers. They let designers independently monitor the interactions between the developer's device and an "unknown" third-party device. Tools such as these are really the only way to see inside other Bluetooth devices during interoperability testing. Protocol analyzers can provide this capability with Piconet-mode operation. To verify operation of a Bluetooth product being developed, it is essential to have a "known good" Bluetooth reference device to connect with. Control is through various means including lowlevel commands or by modifying the software and firmware controlling the Bluetooth device. In this regard, analyzers can act as neutral third parties, capturing protocol failures and clearly identifying the device in the net operating incorrectly.Ī designer normally has complete control over the Bluetooth device under development. One function they provide is to monitor traffic in a piconet (the term for a wireless network formed by at least two Bluetooth devices) without influencing it in any way. This application decodes and displays the information in a variety of userselected formats.īluetooth protocol analyzers are themselves Bluetooth devices. The air probe passes packets via USB to a PC equipped with a Bluetooth protocol analysis application. This "air probe" interface can transmit, receive, and independently intercept Bluetooth packets sent between other Bluetooth devices. The controller runs the Bluetooth protocol stack elements. The hardware portion contains a Bluetooth-approved radio and baseband controller. Protocol analyzers have a hardware and a software component. Protocol analyzers monitor, capture, and interpret traffic between connected digital devices communicating over a network. A class of instruments known as Bluetooth protocol analyzers has emerged to aid in this task. Design teams have the formidable challenge of implementing and qualifying both products and applications using the Bluetooth standard. Demand for Bluetooth products is also expected to grow dramatically in automotive, industrial, and medical areas.Ĭonsequently, Bluetooth development is on the fast track. It provides a simple, reliable means of interconnecting groups of devices such as PDAs, printers, and computers. Bluetooth wireless networking technology is expected to change the way people work, interact, and exchange information. It's hard to pick up a magazine or trade journal today and not read about Bluetooth.
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