Bluetooth

Submitted to:

Doctor : Rabie Ramadan

 Submitted by:

 

Khaled Mohammed Ali Hassan

Master’s Student, Cairo

University/2011

 

BlueTooth- Some Specifications

• Uses unlicensed 2.402 - 2.480 GHz frequency range

• Frequency hopping spread spectrum 79 hops separated

by 1 MHz

• Maximum frequency hopping rate: 1600 hops/sec

• Nominal range: 10 cm to 10 meters

• Nominal antenna power: 0 dBm

• One complete Bluetooth data packet can be transmitted

within each 625 msec hop slot

Potential Bluetooth Markets

Bluetooth Protocol Stack

• Adopted Protocols

– PPP(Point-To-Point Protocol)

– TCP/UDP/IP

– OBEX-Session Protocol for IrDA(Infrared Data

Association)

– Contents Fromat(e.g. vCard, vCalendar)

– WAP-Wireless Application Protocol

Bluetooth Protocol Stack

Bluetooth Security

• Supports Unidirectional or Mutual Encryption based on

a Secret Link key Shared Between Two Devices

• Security Defined In 3 modes:

– Mode1- No Security

– Mode 2 - Service Level Security: Not Established

Before Channel is Established at L2CAP

– Mode 3 - Link Level Security: Device Initiates Security

Before LMP Link is Setup

Bluetooth Security

• Devices and Services can be Set for Different Levels of

Security

– Two Trust Levels are Set for Devices

• Trusted Device: Fixed Relationship and

Unrestricted Access to All Services

• Untrusted : No Permanent relationship and

Restricted Services

Bluetooth Security

• 3 Levels of Service Access

– Require Authorization and Authenication

– Require Authentication Only

– Default Security for Legacy Applications

The Challenges

• Future work is aimed to develop and

design a blue tooth-enabled data

concentrator for data acquisition and

analysis.

CONCLUSION

• Blue tooth represents a great chance for sensor-

networked architecture. This architecture heralds

wireless future for home and also for industrial

implementation. With a blue tooth RF link, users

only need to bring the devices with in range, and

the devices will automatically link up and

exchange information.

• Thus implementation of blue tooth technology for

sensor networks not only cuts wiring cost but also

integrates the industrial environment to smarter

environment.

CONCLUSION

• Today, with a broader specifications and a

renewed concentration on interoperability,

manufacturers are ready to forge ahead and take

blue tooth products to the market place.

Embedded design can incorporate the blue tooth

wireless technology into a range of new products

to meet the growing demand for connected

information appliances.