WiMAX Handbook: Building 802.16 Networks / Edition 1
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WiMAX Handbook: Building 802.16 Networks / Edition 1

by Frank Ohrtman
     
 

ISBN-10: 0071454012

ISBN-13: 9780071454018

Pub. Date: 05/24/2005

Publisher: McGraw-Hill Professional Publishing

Wi-MAX is a big deal because it’s cheaper, smaller, simpler and easier to use than any existing broadband option (DSL, cable, fiber, 3G wireless) – it also bypasses the existing wired infrastructure and legacy service providers (i.e. the phone and cable companies). This book provides a basic technical introduction to the IEEE standard, allowing

Overview

Wi-MAX is a big deal because it’s cheaper, smaller, simpler and easier to use than any existing broadband option (DSL, cable, fiber, 3G wireless) – it also bypasses the existing wired infrastructure and legacy service providers (i.e. the phone and cable companies). This book provides a basic technical introduction to the IEEE standard, allowing engineers, technologists, and decision-makers to ascertain how this hugely disruptive technology is going to affect their businesses.

Product Details

ISBN-13:
9780071454018
Publisher:
McGraw-Hill Professional Publishing
Publication date:
05/24/2005
Pages:
288
Product dimensions:
7.40(w) x 9.20(h) x 0.87(d)

Table of Contents

Acknowledgmentsxxi
Prefacexxiii
Chapter 1Introduction1
Telecommunications Networks - The Need for an Alternative Form of Access3
Switching4
Transport4
Access5
Replacing the PSTN One Component at a Time5
Objections to Wireless Networks6
QoS6
Security6
Interference Mitigation6
Economic Advantage of WiMAX7
Regulatory Aspects of Wireless Networks8
Improved Quality of Life with Wireless Networks8
Disruptive Technology9
Disruption for Telephone Companies10
Disruption for Cable TV and Satellite TV Companies10
Disruption for Cell Phone Companies10
Disruption for the Backhaul Industry10
Conclusion11
Chapter 2WiMAX: The Physical Layer (PHY)13
Introduction14
The Function of the PHY15
OFDM: The "Big So What?!" of WiMAX16
TDD and FDD17
Adaptive Antenna System (AAS)18
WiMAX Variants18
OFDM Variants 2-11 GHz19
Single Carrier (SC) Variants22
Conclusion27
Chapter 3The Medium Access Control (MAC) Layer29
The MAC as the "Smarts" for the Physical Layer30
The MAC and WiMAX Architecture30
Service Classes and QoS32
Service-Specific Convergence Sublayers34
Common Part Sublayer35
Packing and Fragmentation37
PDU Creation and Automatic Repeat Request (ARQ)37
Transmission Convergence (TC) Layer39
Chapter 4How WiMAX Works41
Channel Acquisition42
Initial Ranging and Negotiation of SS Capabilities42
SS Authentication and Registration44
IP Connectivity44
Connection Setup45
Radio Link Control (RLC)46
The UL48
Service Flow49
Conclusion51
Chapter 5Quality of Service (QoS) on WiMAX53
Overview54
The Challenge54
Legacy QoS Mechanisms55
FDD/TDD/OFDM55
Forward Error Correction (FEC)56
Bandwidth Is the Answer - What Was the Question?57
QPSK Versus QAM63
Multiplexing in OFDM64
What OFDM Means to WiMAX66
QoS: Error Correction and Interleaving66
QoS Measures Specific to the WiMAX Specification67
Theory of Operation67
Service Flows68
The Object Model70
Service Classes71
Authorization71
Types of Service Flows72
Service Flow Management74
Conclusion75
Chapter 6Dealing with Interference with WiMAX77
Interference - Some Assumptions78
Defining Interference or "Think Receiver"78
Forms of Interference79
Countering Interference82
Changing Channels Within the ISM or U-NII Bands83
Dealing with Distance84
Internal (CoCH) Sources of Interference85
OFDM in Overcoming Interference86
Handling ISI88
Mitigating Interference with Antenna Technology89
Multiple Antennas: AAS89
Adaptive Antenna (AA) Techniques91
Dynamic Frequency Selection (DFS)93
If You Want Interference, Call the Black Ravens93
Chapter 7Security and 802.16 WiMAX95
Security in WiMAX Networks96
The Security Sublayer96
The PKM Protocol100
TEK Exchange Overview102
Cryptographic Methods102
Conclusion104
Chapter 8WiMAX VoIP105
PSTN Architecture106
Voice Over WiMAX-The Challenge107
VoIP107
Origins of VoIP107
How Does VoIP Work?108
VoIP Signaling Protocols109
Switching113
Softswitch (aka Gatekeeper, Media Gateway Controller)113
Other Softswitch Components115
VoIP and Softswitch Pave the Way for Voice Over WiMAX117
Objections to VoIP Over WiMAX117
Objection One: Voice Quality of WiMAX VoIP118
Solution: Voice Codecs Designed for VoIP, Especially VoIP Over WiMAX122
Modifying Voice Codecs to Improve Voice Quality122
The QoS Solution: Fix Circuit-Switched Voice Codecs in a Packet Switched, Wireless World with Enhanced Speech-Processing Software123
Objection Two: Security for WiMAX VoIP124
Objection Three: CALEA and E911125
E911125
Architecture of WiMAX VoIP: Putting It All Together126
WiMAX VoIP Phones127
Conclusion128
Chapter 9WiMAX IPTV131
WISP WiMAX Triple Play?132
IPTV: Competing with Cable TV and Satellite TV132
How It Works134
Bandwidth and Compression Technologies136
Other Video Revenue Streams136
Video on Demand137
Personal Video Recorder138
Conclusion: A TV Station Called WiMAX138
Chapter 10Regulatory Aspects of WiMAX139
Operate Licensed or Unlicensed?140
Current Regulatory Environment142
Power Limits142
WiMAX 802.16 - Its Relationship to FCC Part 15, Section 247143
802.16 - FCC Part 15, Section 407143
Interference144
Laws on Antennas and Towers150
New Unlicensed Frequencies151
Unlicensed Frequencies Summary152
The FCC New Spectrum Policy152
Four Problem Areas in Spectrum Management and Their Solutions153
Recent Statements from the FCC on Broadband and Spectrum Policy159
Conclusion161
Chapter 11How to Dismantle a PSTN: The Business Case for WiMAX163
Overview164
Immediate Markets164
Secondary Markets166
Demographics167
Services168
Frequency Band Alternatives170
Capital Expense (CAPEX) Items172
CPE Equipment174
Operating Expense (OPEX) Items176
The Business Case176
Future Markets179
Economics of Wireless in the Enterprise182
You Can "Take It with You When You Go"182
Economics of WiMAX in Public Networks184
Economic Benefits of Ubiquitous Broadband186
Conclusion195
Chapter 12Projections: WiMAX Is a Disruptive Technology197
Disruptive Technology198
How WiMAX Will Disrupt the Telephone Industry199
Cheaper199
Simpler200
Smaller200
More Convenient to Use200
Deconstruction201
Goetterdammerung or Creative Destruction in the Telecommunications Industry201
Appendix AConsiderations in Building Wireless Networks205
Design206
Network Topology206
Link Type207
Environment207
Throughput, Range, and Bit Error Rate (BER)208
Multipath Fading Tolerance209
Link Budget209
Frequency Band209
Wireless Protocols Preceding WiMAX215
802.11 Summary217
Planning217
Fresnel Zone218
How to Calculate a Link Budget220
Site Survey227
How to Make a Frequency Plan228
Frequency Allocation230
Equipment Selection231
How to Look at Specs231
The WAN/MAN Connection232
How to Put a BS Where There Is No Power244
How to Overcome Line-of-Sight Limitations246
Index247

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