1 / 5

Understanding Bluetooth: Key Features and Device Connectivity in Wireless LANs

This section provides an in-depth exploration of Bluetooth technology, focusing on its role in wireless local area networks (WLANs). It covers the consortium behind Bluetooth, including key players like Ericsson and Nokia, and various application scenarios for connecting peripheral devices such as loudspeakers and headsets. Also highlighted are Bluetooth's capabilities for ad-hoc networking, low-cost small devices, and bridging networks, particularly through mobile phones. Additionally, the Bluetooth MAC layer structure and scatternet configurations are explained, detailing the communication between multiple devices.

buck
Télécharger la présentation

Understanding Bluetooth: Key Features and Device Connectivity in Wireless LANs

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. Mobile Communications Chapter 7: Wireless LANs 3ª Parte - Bluetooth Mobile Communications: Wireless LANs 7.0.1

  2. Bluetooth • Consortium: Ericsson, Intel, IBM, Nokia, Toshiba - many members • Scenarios • connection of peripheral devices • loudspeaker, joystick, headset • support of ad-hoc networking • small devices, low-cost • bridging of networks • e.g., GSM via mobile phone - Bluetooth - laptop • Simple, cheap, replacement of IrDA, low range, lower data rates • 2.4 GHz, FHSS, TDD, CDMA Mobile Communications: Wireless LANs 7.46.1

  3. States of a Bluetooth device (PHY layer) STANDBY unconnected inquiry page connecting transmit connected active PARK HOLD SNIFF low power Mobile Communications: Wireless LANs 7.47.1

  4. Bluetooth MAC layer • Synchronous Connection-Oriented link (SCO) • symmetrical, circuit switched, point-to-point • Asynchronous Connectionless Link (ACL) • packet switched, point-to-multipoint, master polls • Access code • synchronization, derived from master, unique per channel • Packet header • 1/3-FEC, MAC address (1 master, 7 slaves), link type, alternating bit ARQ/SEQ, checksum 72 54 0-2745 bits access code packet header payload 3 4 1 1 1 8 bits MAC address type flow ARQN SEQN HEC Mobile Communications: Wireless LANs 7.48.1

  5. Scatternets • Each piconet has one master and up to 7 slaves • Master determines hopping sequence, slaves have to synchronize • Participation in a piconet = synchronization to hopping sequence • Communication between piconets = devices jumping back and forth between the piconets piconets Mobile Communications: Wireless LANs 7.49.1

More Related