Chapter6_5th_edition

Chapter6_5th_edition - Chapter6 WirelessandMobileNetworks A...

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6: Wireless and Mobile 6-1 Chapter 6 Wireless and Mobile Networks A note on the use of these ppt slides: We’re making these slides freely available to all (faculty, students, readers). They’re in PowerPoint form so you can add, modify, and delete slides (including this one) and slide content to suit your needs. They obviously represent a lot of work on our part. In return for use, we only ask the following: If you use these slides (e.g., in a class) in substantially unaltered form, that you mention their source (after all, we’d like people to use our book!) If you post any slides in substantially unaltered form on a www site, that you note that they are adapted from (or perhaps identical to) our slides, and note our copyright of this material. Thanks and enjoy! JFK/KWR All material copyright 1996-2009 J.F Kurose and K.W. Ross, All Rights Reserved Computer Networking: A Top  Down Approach  5 th  edition.  Jim Kurose, Keith Ross Addison-Wesley, April 2009. 
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6: Wireless and Mobile 6-2 Chapter 6: Wireless and Mobile Networks Background:   # wireless (mobile) phone subscribers now exceeds # wired  phone subscribers! computer nets: laptops, palmtops, PDAs, Internet-enabled  phone promise anytime untethered Internet access two important (but different) challenges wireless:  communication over wireless link mobility:  handling the mobile user who changes point of attachment to  network
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6: Wireless and Mobile 6-3 Chapter 6 outline 6.1 Introduction  Wireless 6.2  Wireless links,  characteristics CDMA 6.3  IEEE 802.11 wireless  LANs (“wi-fi”) 6.4   Cellular Internet Access architecture standards (e.g., GSM) Mobility 6.5  Principles: addressing and  routing to mobile users 6.6  Mobile IP 6.7  Handling mobility in cellular  networks 6.8  Mobility and higher-layer  protocols 6.9   Summary
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6: Wireless and Mobile 6-4 Elements of a wireless network network  infrastructure wireless hosts laptop, PDA, IP phone run applications may be stationary (non-mobile)  or mobile wireless does not always  mean mobility
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6: Wireless and Mobile 6-5 Elements of a wireless network network  infrastructure  base station typically connected to wired  network relay - responsible for  sending packets between  wired network and wireless  host(s) in its “area” e.g., cell towers,  802.11  access points 
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6: Wireless and Mobile 6-6 Elements of a wireless network network  infrastructure  wireless link typically used to connect  mobile(s) to base station also used as backbone link  multiple access protocol  coordinates link access  various data rates,  transmission distance
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6: Wireless and Mobile 6-7 Characteristics of selected wireless link  standards Indoor 10-30m Outdoor 50-200m Mid-range outdoor 200m – 4 Km Long-range outdoor 5Km – 20 Km .056 .384 1 4 5-11 54 IS-95, CDMA, GSM 2G
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This note was uploaded on 01/16/2012 for the course CS 118 taught by Professor Chu during the Spring '08 term at UCLA.

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Chapter6_5th_edition - Chapter6 WirelessandMobileNetworks A...

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