This document summarizes a technical seminar presentation on Bluetooth technology. It includes an agenda covering an introduction to Bluetooth, its states, features, protocol stack including layers like RFCOMM, L2CAP, and the link controller. It describes Bluetooth's short-range wireless communication, various states like standby and connected, its layered protocol stack, and security features. The presentation concludes by asking if there are any questions.

1. Technical Seminar
on
BLUETOOTH TECHNOLOGY
Presented by
Swati Pathare
(116T1A0554)

2. Agenda
 Introduction
 Bluetooth states
 Features
 Bluetooth Protocol Stack
 RFCOMM/SDP
 L2CAP
 Host Controller Interface
 Link Controller and Link
Manager
 Baseband
 Packet Format
 Security
 Advantages
 Bluetooth Conclusion
 Conclusion

3. INTRODUCTION
Bluetooth is a wireless technology
standard for exchanging data over short
distances.
Defines a protocol stack to enable
heterogeneous devices to
communicate.
The Bluetooth stack includes protocols
for the radio layer all the way up to
device discovery, service discovery, etc.

4. 4
Bluetooth States
Standby
Inquiry Page
Transmit Connected
Park Hold Sniff
Unconnected
Connecting
Active
Low power
. Initially, all nodes in
standby.
. Node (master) can begin
inquiry to find nearby
devices.
. Piconet is then formed.
. Devices join by paging.

5. Features
-Short range (up to 10m on average)
- Low bandwidth (about 720kps max)
- Low component cost
- Unlicensed radio band
- Low power
- Limited interference issues
- Secure (has a built in encryption)

6. 6
Bluetooth Protocol Stack
RF
Baseband
Link Manager
L2CAP
RFCOMM/SDP
Applications
Link Controller
Host Controller Interface
PHY
Data Link Layer
Network Layer
Transport Layer
Session Layer
Presentation Layer
Application
OSI/ISO

7. 7
RFCOMM/SDP
RF
Baseband
Link Manager
L2CAP
RFCOMM/SDP
Applications
Link Controller
Host Controller Interface
BT serial port profile is based
on this protocol
It acts as a transport layer.
Service discovery, serial port
interface.

8. 8
L2CAP
Logical Link Control and
Adaptation Protocol=
Session Layer.
L2CAP provides
• Protocol multiplexing
• Quality of service negotiation
RF
Baseband
Link Manager
L2CAP
RFCOMM/SDP
Applications
Link Controller
Host Controller Interface

9. 9
Host Controller Interface
RF
Baseband
Link Manager
L2CAP
RFCOMM/SDP
Applications
Link Controller
Host Controller Interface
Optional interface layer
between higher and lower
layers of the BT stack.
E.g., when lower- and higher
BT layers run on different
Devices: PCMCIA card and
PC’s processor.

10. 10
Link Controller and Link Manager
RF
Baseband
Link Manager
L2CAP
RFCOMM/SDP
Applications
Link Controller
Host Controller Interface
Carries out inquiry and paging
operations; manages multiple
links and different piconets.
Attaching/detaching slaves from
piconets; power management; security.

11. 11
Baseband
Carries out MAC
functions.
RF
Baseband
Link Manager
L2CAP
RFCOMM/SDP
Applications
Link Controller
Host Controller Interface
Control end of baseband
+link controller=
Data link layer

12. Packet Format

13. 13
Security
• Authentication and encryption.
• LMP provides mechanisms for negotiation of
encryption modes, keys, etc.

14. Advantages

15. Bluetooth Devices

16. Conclusion
• Bluetooth is a short range digital wireless system.
• Multiple types of media and services can be sent.
• Discover devices and services and perform action.
• Many new devices are coming.

17. Any Query…????