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Information about Bluetooth

Published on October 15, 2011

Author: wakanda


Slide 1: WELCOME TO THE SEMINAR ON “BLUETOOTH TECHNOLOGY” PREPARED BY : : PREPARED BY : ARJUN ROSEMARY SREELAKSHMI Slide 3: What is Bluetooth? Slide 4: A short-range wireless technology Designed for several needs : Interconnecting a computer and peripherals Interconnecting various handheld devices such as laptop, notebook, cell phone, palmtop Any short-range application where low cost is essential Intended to be embedded in other devices ORIGIN : ORIGIN Slide 6: 1994 - Bluetooth technology was invented by Ericsson Mobile Communications 1998 - The Bluetooth SIG was founded The Bluetooth SIG is a unification of leaders in the telecommunications, computing network, industrial automation, and automotive industries The word “Bluetooth” is taken from the 10th century Danish King Harald Bluetooth First developed in Scandinavia It simplifies and combines multiple forms of wireless communication to a single, secure, less-power, low-cost, globally available radio frequency DEVELOPMENT : DEVELOPMENT Slide 8: Its purpose was to replace the wire technology in order to rapidly transfer voice and data 1998 – Bluetooth Core Specification introduced 2003 – Bluetooth version 2.0 introduced 2004 – Bluetooth version 2.0 + EDR (Enhanced Data Rate) introduced Bluetooth Version 1.1 and Earlier : Bluetooth Version 1.1 and Earlier Versions 1.0 and 1.0B Not successfully developed Main issue was the lack of interoperability among devices Version 1.1 First truly successful operating version Has greater interoperability Bluetooth Version 1.2 : Bluetooth Version 1.2 Backward compatible with Bluetooth 1.1 Adaptive Frequency Hopping Faster transmission speeds (1 Mbps) Extended Synchronous Connections Oriented links Received Signal Strength Indicator Host Controller Interface (HCI) support for 3-wire UART HCI access to timing information for Bluetooth applications Bluetooth Version 2.0 + EDR : Bluetooth Version 2.0 + EDR Backward compatible with previous Bluetooth versions Three times faster transmission speed Enhanced data rate of up to 3 Mbps Lower power consumption due to reduced duty cycles Broadcast or multicast support Simplification of multi-link scenarios due to more available bandwidth Distributed media-access control protocols Improved Bit Error Rate performance COMPONENTS : COMPONENTS Slide 13: Antenna or RF Bluetooth Radio and Base band Software Protocol Stack Antenna or RF : Antenna or RF Bluetooth silicon manufacturers cannot provide an antenna with the hardware Even single chip solutions require specialized antenna design and skills depending on the device Bluetooth Radio and Baseband : Bluetooth Radio and Baseband Bluetooth radio - hardware transceiver unit that implements the Bluetooth radio specification Purpose - provide compatibility between Bluetooth devices and to define the quality of the system Baseband mainly consists of Link Controller (LC) LC carries out baseband protocols and low-layer link routines Slide 16: Software Protocol Stack Link Manager (LM) : Link Manager (LM) Manages link setup, link configuration, and link packet control, transfer and link security Handles synchronous and asynchronous packet communication within the piconet and timing parameters Handles master or slave role switching between devices 'Sniff', 'hold', and 'park' are power saving modes controlled by the LM Logical Link Control and Adaptation Protocol ( L2CAP ) : Logical Link Control and Adaptation Protocol ( L2CAP ) Services provided: Protocol multiplexing Segmentation and reassembly Quality of service Slide 19: Host Control Interface ( HCI ) Provides a standard interface to the Bluetooth module and LM services that is independent from the host hardware implementation Service Discovery Protocol ( SDP ) Exposes high-level services such as LAN access or printer services to users and other applications Audio and Telephony Control : Audio and Telephony Control These two protocols are linked - Telephony Control contains Call Control and Audio Control Defines the interface needed to connect and disconnect a call Telephony audio links are established with synchronous links Slide 21: RFCOMM Provides a protocol to emulate cables with Bluetooth Enables compatibility with a large base of applications that currently use the serial port as their main communication bus Human Interface Device ( HID ) A protocol that enables the concept of a cordless computer Slide 22: TCP/IP Powerful way to link devices A network and transport layer that's widely supported by applications and APIs across almost every operating system Problems - handling ad hoc networking, DNS name resolution, and broadcasting Other Protocols Includes WAP, object exchange, still image, IR, etc. Used by an application that sends its native packets through Bluetooth FEATURES : FEATURES Slide 24: They are wireless Bluetooth technology is inexpensive It is automatic Standardized protocol (Interoperability) Low interference Low energy consumption Share voice and data Instant Personal Area Network (PAN) Upgradeable They are here to stay CHALLENGES : CHALLENGES Slide 26: Speed of infrared (4 Mbps) is much faster than Bluetooth (1Mbps) The greater range and radio frequency (RF) of Bluetooth make it much open to interception and attack APPLICATION : APPLICATION Slide 28: The application of Bluetooth technology are: Wireless networking between laptops and desktops Wireless communications with PC input and output devices The transfer of files and MP3, between mobile phones and mobile to PCs Bluetooth technology headsets for smart phones and cell phones SUMMARY : SUMMARY Slide 30: "Bluetooth" is taken from the 10th century Danish King Harald Bluetooth Officially introduced in 1998, to be a wire replacement technology Short-range wireless standard designed with the same cost goals and greater reliability and performance as the cable it replaces Hundreds of different applications and devices available Transformation of Bluetooth technology is going to bring major changes in the near future THANK YOU ! : THANK YOU !

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