Protols used in bluetooth
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The document provides an overview of Bluetooth technology, detailing its history, architecture, and various protocols used within its stack. It discusses the advantages and disadvantages of Bluetooth, emphasizing its role in short-range wireless communication and ongoing developments to enhance security and speed. Additionally, the content highlights future prospects for Bluetooth technology, indicating a strong demand for advancements in wireless applications.
Protols used in bluetooth
- 1. Mobile Computing: Protocols Used In Bluetooth Presented By: Ms. Sonali. Parab. MscIT Part 1, Semester 2. Incharge: Mr. Jadhav.
- 2. ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ Overview of the content: Introduction. Technology Review. Specification of Bluetooth technology. Architecture of Bluetooth Protocol. Protocols in Bluetooth Stack. Advantages And Disadvantages Bluetooth. Future of Bluetooth Conclusion Bibliography
- 3. Introduction. ▪ Wireless technology standard for exchanging data over short distances. ▪ Personal Area Networks(PAN). ▪ Invented by telecom vendor Ericsson in 1994.
- 4. Introduction. ▪ Originally was a wire replacement technology. ▪ Applications: Mobile phones, Laptops, Bluetooth Headsets, Telehealth devices, etc.
- 5. Technology Review. ▪ Bluetooth uses radio technology called “Frequency Hopping spread Spectrum”. ▪ Supports data rate of I mb/s (originally). ▪ Managed by the Bluetooth Special Interest Group (SIG). ▪ Bluetooth was standardized as IEEE 802.15.1, but the standard is no longer maintained.
- 6. Specification of Bluetooth technology. ▪ Core Specification Deals with lower layers of architecture and describes how technology works. ▪ Profile Specification Focuses on how to build inter operating devices using the core technology.
- 7. Architecture of Bluetooth Protocol.
- 8. Protocols Used In Bluetooth. Radio: ▪ Is situated at the most bottom of all the layers. ▪ Used in the specification of the air interfaces like frequencies, modulation, transmit power ▪ Bluetooth radio is a transceiver which transmits and receives modulated electrical signals from peer Bluetooth devices
- 9. Protocols Used In Bluetooth. Baseband: ▪ The Baseband and Link control layer enable the physical connection between any Bluetooth enabled products. ▪ This layer also controls the synchronisation and the frequency hopping sequence. ▪ The 2 different link types Synchronous Connection Oriented (SCO) and Asynchronous Connectionless (ACL) are also managed by this layer.
- 10. Protocols Used In Bluetooth. Audio: ▪ Audio transmissions can be performed between one or more Bluetooth enabled units, using a number of different usage models. ▪ Audio data does not go through the L2CAP layer (see diagram 1) but directly between 2 Bluetooth units.
- 11. Protocols Used In Bluetooth. Host Controller Interface (HCI): : ▪ The Host Controller Interface provides an interface method for accessing the Bluetooth hardware capabilities. ▪ It contains a command interface, which acts between the Baseband controller and link manager and has access to hardware status. ▪ It contains the control and event registers.
- 12. Protocols Used In Bluetooth. Link Manager protocol (LMP): ▪ The Link Manager Protocol, is responsible for link set-up between Bluetooth enabled units. ▪ It handles the control and negotiation of packet sizes used when transmitting data. ▪ The Link Manager Protocol also handles management of power modes, power consumption, and state of a Bluetooth unit in a piconet. ▪ Finally, this layer handles generation, exchange and control of link and encryption keys for authentication and encryption
- 13. Protocols Used In Bluetooth. Logical Link Control and Adaption Protocol (L2CAP): ▪ The Bluetooth logical link control and adaptation protocol is situated over the Baseband layer and beside the Link Manager Protocol in the Bluetooth protocol stack. The L2CAP layer provides connection-oriented and connectionless data services to upper layers. ▪ The four main tasks for L2CAP are: ▪ Multiplexing - L2CAP must support protocol multiplexing since a number of protocols (e.g. SDP, RFCOMM and TCS Binary) can operate over L2CAP. ▪ Segmentation and Reassembly - Data packets exceeding the Maximum Transmission Unit, MTU, must be segmented before being transmitted. This and the reverse functionality, reassemble, is performed by L2CAP. ▪ Quality of Service - The establishment of an L2CAP connection allows the exchange of information regarding current Quality of Service for the connection between the two Bluetooth units. ▪ Groups - The L2CAP specification supports the mapping of groups on to a piconet.
- 14. Protocols Used In Bluetooth. Service Discovery Protocol (SDP): ▪ The Service Disocvery Protocol defines how a client's Bluetooth enabled application will discover available Bluetooth server' services and characteristics upon entering a Bluetooth server area. ▪ SDP also provides functionality for detecting when a service is no longer available.
- 15. Protocols Used In Bluetooth. RFCOMM: ▪ RFCOMM protocol is a serial port protocol. ▪ The protocol covers applications that make use of serial ports of the unit. ▪ RFCOMM emulates RS-232 control and data signals over the baseband. ▪ It also provides capabilities for the upper service levels such as OBEX, which uses a serial line as a transport mechanism.
- 16. Protocols Used In Bluetooth. Telephony control protocol: a. Telephony Control – Binary b.Telephony Control – AT Commands ▪Bit-oriented protocol, which defines the call control signalling for the establishment of speech and data calls between Bluetooth units. ▪Are supported for transmitting control signals for telephony control. ▪Provides functionality to exchange signalling information unrelated to ongoing calls. ▪ITU-T Recommended. ▪These use the serial port emulation, RFCOMM, for transmission.
- 17. Protocols Used In Bluetooth. Adopted protocols ▪ This section describes a number of protocols that are defined to be adopted to the Bluetooth protocol stack. ▪ Note some of these adaptations are at the moment incomplete. a. Point-to-Point Protocol - PPP – Designed to run over RFCOMM to accomplish point-to-point connections. – packet-oriented protocol and must therefore use its serial mechanisms to convert the packet data stream into a serial data streams.
- 18. Protocols Used In Bluetooth. Adopted protocols ▪ b. TCP/UDP/IP – Defined to operate in Bluetooth units allowing them to communicate with other units connected, for instance, to the Internet. – Bluetooth can acts like a bridge to internet – The TCP/IP/PPP protocol configuration is used for all Internet Bridge usage scenarios in Bluetooth 1.0 and for OBEX in future versions. – The UDP/IP/PPP configuration is available as transport for WAP.
- 19. Protocols Used In Bluetooth. Adopted protocols ▪ c. IrOBEX, shortly OBEX Protocol – Optional application layer protocol designed to enable units supporting infrared communication to exchange a wide variety of data and commands in a resource-sensitive standardized fashion. – Client-server model and is independent of the transport mechanism and transport API. – Defines a folder-listing object, which is used to browse the contents of folders on remote device. – RFCOMM is used as the main transport layer for OBEX.
- 20. Protocols Used In Bluetooth. Adopted protocols ▪ d. Wireless Application Protocol, WAP – wireless protocol specification that works across a variety of widearea wireless network technologies bringing the Internet to mobile devices. – Bluetooth can be used like other wireless networks with regard to WAP, it can be used to provide a bearer for transporting data between the WAP Client and its adjacent WAP Server. – Furthermore, Bluetooth’s ad hoc networking capability gives a WAP client unique possibilities regarding mobility compared with other WAP bearers.
- 21. Protocols Used In Bluetooth. Adopted protocols ▪ e. Content formats – Formats for transmitting vCard and vCalendar information are also defined in the Bluetooth specification. – The formats do not define transport mechanisms but the format in which electronic business cards and personal calendar entries and scheduling information are transported. – vCard and vCalendar is transferred by OBEX.
- 22. Advantages And Disadvantages Bluetooth. Disadvantages Advantages ▪ Short ranged. ▪ Eliminates wires. ▪ Facilities data communication. and ▪ Standardized protocols. ▪ Free of charge. ▪ Easy to use. voice ▪ Less secured ▪ Interference devices. with other
- 23. Future Of Bluetooth. ▪ Very good future ahead as it need basic needs of connectivity. ▪ Latest versions are improving both in securities and capabilities. ▪ New versions will meet high speed and large range. ▪ Many companies are developing Bluetooth applications in demand.
- 24. Conclusion ▪ A new global standard for voice and data. ▪ Eliminates cables. ▪ Low power, low range, low cost network device. ▪ Further improvements are planned to made in – Data Rate. – Power Reduction – Range
- 25. Bibliography ▪ http:// www.tech.plym.ac.uk/dcee/postgrad/reference/BlueTooth/page2.html#architecture ▪ http://www.althos.com/tutorial/Bluetooth-tutorial-protocol-layers.html ▪ http://www.bluetooth.com/Pages/Bluetooth-Home.aspx ▪ www.palowireless.com/infotooth/tutorial.asp ▪ http://en.wikipedia.org/wiki/Bluetooth_protocols ▪ http://msdn.microsoft.com/en-us/library/ms890956.aspx ▪ http://www.thestudymaterial.com/presentation-seminar/electronicspresentation/51-bluetooth-technology.html?start=3 ▪ http://www.scribd.com/doc/135626916/Bluetooth-Protocol-Stack