Embedded Bluetooth Gang Xie presents to EE281 Class Stanford University 11/22/2002.

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Presentation transcript:

Embedded Bluetooth Gang Xie presents to EE281 Class Stanford University 11/22/2002

Bluetooth Was Originally a Cable- Replacement Technology

You arrive at the office … In the Office … While in a meeting, … When inspecting equipment, …

On the road … You arrive at the airport … You enter the airport waiting lounge, … You get on the rent-a-car bus, …

Documentation Specification describes how the technology works, i.e., the Bluetooth protocol architecture. Profiles describe how the technology is used, i.e., how different parts of the specification can be used to fulfill a desired function for a Bluetooth device.

Bluetooth Specification Protocol Stack

Bluetooth Profile Structure

Radio Specification GHz2.480 GHz PDU format:  The Bluetooth system is operating in the 2.4 GHz ISM (Industrial Scientific Medicine) band. The regulatory range of this frequency band is – GHz.  The Bluetooth radio accomplishes spectrum spreading by in 79 hops displaced by 1 MHz.  Radio modulation uses GFSK. Operating frequency bands:

Baseband Specification There is one master and one or more slaves in each piconet Packet format:

Service Discovery Protocol Specification Protocol Data Unit format:  PDU ID: identifies the type of PDU  Transaction ID: uniquely identifies request PDUs and is used to match response PDUs to request PDUs  Parameter Length

Bluetooth Design and Development Tools  Design tools  Design tools: RF and digital design tools, simulators, and other tools  Development tools  Development tools: including modules, chipsets, RA and digital kits, protocol implementations and other tools  Testing/evaluation tools

Key Features Robustness Low complexity Low power: battery powered Low cost : about $5  Fast acknowledgement  Fast frequency hopping scheme  Shorter packets

     References