Bluetooth

A Comparison of Bluetooth and competing technologies
Presented by: Avinash Swami M.Tech(EECE)

Contents
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Purpose and Specifications Communication Protocols Disadvantages and Advantages in certain scenarios Application comparison, consumer criteria, business analysts

Technologies
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Bluetooth IrDA HomeRF

Purpose
 Why Bluetooth?
 The Bluetooth specification is a global technology that allows wireless communication and networking between PCs and other portable devices.

 Why HomeRF?
 HomeRF enables different consumer electronic devices to communicate with each other while providing users with a complete home network solution. Users will be able to dial in from a remote location and control any device.

 Why IrDA?
 IrDA is intended for point-to-point links between two devices for simple data transfers and file synchronization.

Technical Specifications
 Transmission Technology  Bluetooth & HomeRF: Radio Frequency  IrDA: Infrared Light Beams

 Spectrum  Bluetooth & HomeRF: 2.4 to 2.485 GHz  IrDA: Optical

Technical Specification (cont.)
 Range
 Bluetooth: 10 meters  HomeRF: 50 meters  IrDA: 1 meter

 Data Rate  Bluetooth: 1 MB  HomeRF: 2 MB  IrDA: 4MB

Technical Specification (cont.)
 Maximum no. of devices
Bluetooth: Up to 8 devices per piconet HomeRF: Up to 127 devices per network IrDA: 2 devices

 Optimal Use
Bluetooth: Connectivity of multiple devices HomeRF: Home Networking IrDA: Short Range, one-to-one data exchange

Communication Protocols
Provides what application are able to run.

Applications RFCOMM / SDP L2CAP
(Logical Link Control and Adaptation Protocol)

RFCOMM: Provides emulation of serial ports over the L2CAP.

SDP: Provides a means for applications to discover which services are available and to determine the characteristics of those available services
Provides connection-oriented and connectionless data services to upper layer protocols with protocol multiplexing capability, segmentation, and reassembly