9781423901402_PPT_Ch18 - Information Technology in Theory...

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 18 Wireless Multimedia Information Technology in Theory By Pelin Aksoy and Laura DeNardis
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 Objectives Understand the role of multimedia access devices such as cell phones and how they have integrated previously separate applications such as voice, Internet applications, electronic commerce, and entertainment Understand how Bluetooth and spread spectrum technologies work Examine the concepts of cells, frequency reuse, and handoff in cellular networks Information Technology in Theory
Background image of page 2
3 Objectives (continued) Become familiar with the main architectural components of a cellular network Understand the role of cellular standards such as GSM and differentiate between 1G, 2G, and 3G systems Examine emerging wireless broadband technologies such as WiMAX and how they might transform information access Information Technology in Theory
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
4 Wireless Multimedia Devices A major transition in IT has been the integration of previously disparate functions into a more unified and mobile multimedia environment Mobile telephony Web browsing Electronic mail Camera GPS Video player Text messaging (also known as SMS) Music player Organizer Calendar Office applications and presentation software Information Technology in Theory
Background image of page 4
5 Wireless Multimedia Devices (continued) Information Technology in Theory
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
6 The Bluetooth Standard Bluetooth technology is a short-range wireless communication standard designed for geographically limited transmissions Also known as the IEEE 802.15.1 standard, Bluetooth is an industry specification for encrypted radio communications It uses an unlicensed (2.4 to 2.485 GHz) frequency band of the radio spectrum, similar to Wi-Fi frequencies Information Technology in Theory
Background image of page 6
7 The Bluetooth Standard (continued) The Bluetooth standard specifies three classes of devices that operate at different ranges: Class 1 radio, which operates at up to 100 meters Class 2 radio, which operates in a range of approximately 10 meters Class 3 radio, which operates in an extremely short range of up to 1 meter Bluetooth uses a wireless transmission approach called frequency hopping spread spectrum (FHSS), which divides the allocated frequency band into smaller bands and rapidly hops between 79 frequencies at a rate of 1600 hops per second Information Technology in Theory
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
8 The Bluetooth Standard (continued) Another type of spread spectrum is direct sequence spread spectrum (DSSS) The Bluetooth standard uses FHSS, the technique that transmits the signal across a transmission channel using various frequencies The duration in which each frequency is used is extremely brief, considering that more than 1000 frequencies are used per second DSSS techniques do not hop from one frequency to the next, but instead rely on spreading the energy of the transmission onto a large range of frequencies at any given time Information Technology in Theory
Background image of page 8
9 The Bluetooth Standard (continued)
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 10
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 47

9781423901402_PPT_Ch18 - Information Technology in Theory...

This preview shows document pages 1 - 10. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online