Team Topic Presentation Team 6 BLUETOOTH

What is Bluetooth? Cable Replacement Automatic Connectivity Hidden Computing Few Examples: 1.Automatic Door Opening. 2.Automatic synchronization of your PDA, Cell Phone, Desktop and Laptop.

Why is it called Bluetooth? Named after Herald Blataand. Blataand means Bluetooth. Unified Denmark and Norway during 10 th century. Bluetooth unifies telecommunication and computing devices.

The History of Bluetooth L.M. Ericcson of Sweden Decided to keep this technology license free – SIG was formed. Now, there are more than 2500 members.

How does Bluetooth work? Short range, adhoc networks called PAN or “piconets”. Maximum 8 units in a piconet. 1 Master and 7 Slaves. Part of different piconets at the same time. Dynamic and automatic connectivity. Radio frequency. 2.4 GHz band. 10M – 100 M range. Data rate – 1 Mbps. Inquiry and Paging procedures are used to establish connectivity.

How is it different? IrDA OBEX – Infrared Tech. Line of sight required. Cannot link more than two devices at the same time. Cellular Technology – Radio frequency Tech. Communication is through a base unit. Wireless LAN – IEEE standard. Meant for Heavy traffic. (11 Mbps) Server based architecture. (Permanent Network) WAP – Radio frequency Tech. Limited to providing internet access to mobile devices like PDA and Cell phones.

Technical challenges addressed by BT Universal acceptance and usage Small size Low power consumption Adaptability Automatic connectivity and synchronizer Security Inter Operability

Radio Layer Operates in 2.4 GHz band. Bandwidth 2400 – 2483 MHz. 79 Channels. Uses Spread Spectrum Communication. Hops 1600 times a second. Hop slot is 625 micro seconds. Short data packets. Highly redundant error correction scheme The BT System Architecture

System Architecture Baseband Controls the radio Provides frequency hop sequence Provides lower level encryption for secure links Two types of Links: SCO and ACL Provides functionalities for establishing connections.

System Architecture Link Manager Protocol Piconet management Link configuration Security functions

System Architecture Logical Link Control and Adaptation Protocol Multiplexing Segmentation and Reassembly Quality of Service

System Architecture Host Controller Interface Additional Layers required: HCI Driver HCI

System Architecture Application Layer Support Protocols required for direct access between application and L2CAP: TCS – Telephony Control Protocol Spec RFCOMM – RF Communications SDP – Service Discover Protocol

Usage Models Proposed Usage Models: Three in One Phone Briefcase Trick Automatic Synchronizer Wireless Headsets

Future 40% of all electronic trading by 2004 Sale of embedded chip (BT chips) for various products will touch $700 M mark by Bluetooth chips will cost laptop manufacturers around $30/- SIG is aiming at making the BT chips available at $5/- per module.