1 / 14

Bluetooth

Joe Casey. Bluetooth. Use short-range wireless links between both mobile and stationary devices. Data and voice can be communicated seamlessly. Personal Area Network (PAN). Bluetooth Standard. Spread-spectrum First-generation can transfer data up to rate of 1 Mbps

nikita
Télécharger la présentation

Bluetooth

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Joe Casey Bluetooth

  2. Use short-range wireless links between both mobile and stationary devices. Data and voice can be communicated seamlessly. Personal Area Network (PAN) Bluetooth Standard

  3. Spread-spectrum • First-generation can transfer data up to rate of 1 Mbps • Version 2.0 can reach 3 Mbps. • Continuously variable slope delta modulation (CVSD) • Voice encoding; minimal disruption • Serially data in binary over radio frequency link Tech Overview

  4. Asynchronous connectionless link (ACL) • Best-effort traffic • Packet-switched • Point-to-multipoint Asynchronous Channels

  5. SCO link Sender and receiver clocks are in synch Circuit-switch Point-to-point connections Used for voice, data, and multimedia All SCO links are symmetrical, providing the same amount of bandwidth in both the sending and receiving directions. Synchronous Connection-Oriented

  6. Spread Spectrum • Time Division Duplexing (TDD) • Derivative of TDMA • Provides time slots for voice and data Modulation

  7. Bluetooth Core Protocols • Cable Replacement Protocol • Telephony Control Protocols • Telephony Control Specification Binary (TCS BIN) • AT-Commands • Adopted Protocols • PPP, UDP/TCP/IP, OBEX, WAP, vCard, vCalendar, IcMC, WAE Bluetooth Protocol Stack

  8. Baseband • Enables the physical RF link between Bluetooth units in a piconet • Link Management Protocol (LMP) • Logical Link Control and Adaptation Layer (L2CAP) • Service Discovery Protocol (SDP) Bluetooth Core Protocols

  9. Responsible for like setup and control between Bluetooth devices. • Baseband packet sizes • Authentication and encryption • Controls power modes, duty cycles, and connection states. Link Management Protocol (LMP)

  10. Logical Link Control and Adaptation Layer • Supports: • higher level protocol multiplexing • Packet segmentation • Quality of service L2CAP

  11. Radio Frequency Communication (RFCOMM) • Serial line emulation of RS-232 serial ports over L2CAP Cable Replacement Protocols

  12. Software runs on a microprocessor in each Bluetooth device. • Responsibilities: • Discovering other remote link managers. • Link setup • Authentication • Configuration Link Management

  13. The messages exchanged between Link Managers • 55 PDUs in Bluetooth specification • Uses 7-bit op code Packet Data Units (PDU)

  14. Morrow, Robert. Bluetooth: Operation and Use. McGraw-Hill Professional. 2002. Muller, Nathan J.. Bluetooth Demystified. McGraw-Hill Professional Book Group. 2000. Wikipedia.org. Bluetooth. December 1, 2009. http://en.wikipedia.org/wiki/Bluetooth. References

More Related