文件名称:
Wireless Networking in the Developing World
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上传时间: 2008-03-27
详细说明： Wireless Networking in the Developing World
About This Book
Where to Begin
....................................................................................................................Purpose of this book 2
....................................................................................Fitting wireless into your existing network 3
......................................................................................................Wireless networking protocols 3&l t;br>......................................................................................................................Question & Answer 5
A Practical Introduction to Radio Physics
...........................................................................................................................What is a wave? 9
.................................................................................................................................Polarization 13
......................................................................................................The electromagnetic spectrum 13
...................................................................................................................................Bandwidth 15
............................................................................................................Frequencies and channels 15
.............................................................................................................Behaviour of radio waves 15
.................................................................................................................................Line of sight 22
..........................................................................................................................................Power 24
..............................................................................................................Physics in the real world 26
Network Design
....................................................................................................Designing the physical network 27
......................................................................................................................The logical network 31
.............................................................................................................802.11 wireless networks 33
.........................................................................................................Mesh networking with OLSR 39
......................................................................................................................Estimating capacity 49
......................................................................................................................Traffic optimization 64
.............................................................................................................Internet link optimization 74
Antennas & Transmission Lines
..........................................................................................................................................Cables 79
.................................................................................................................................Waveguides 81
..............................................................................................................Connectors and adapters 84
.....................................................................................................Antennas & radiation patterns 86
...........................................................................................................................Reflector theory 98
....................................................................................................................................Amplifiers 99
.............................................................................................................Practical antenna designs 101
Networking Hardware
.............................................................................................................................Wired wireless 121
.....................................................................................................Choosing wireless components 123
........................................................................................................Commercial vs. DIY solutions 125
......................................................................................................Professional wireless products 127
.............................................................................................................Building an AP from a PC 133
Security
..........................................................................................................................Physical security 146
.................................................................................................................Threats to the network 148
..............................................................................................................................Authentication 150
........................................................................................................................................Privacy 156
...................................................................................................................................Monitoring 163
Building an Outdoor Node
.................................................................................................................Waterproof enclosures 171
...........................................................................................................................Providing power 172
..............................................................................................................Mounting considerations 173
..........................................................................................................................................Safety 179
....................................................................................Aligning antennas on a long distance link 180
.....................................................................................................Surge and lightning protection 182
..................................................................................................................Solar and wind power 184
Troubleshooting
......................................................................................................................Building your team 195
.................................................................................................Proper troubleshooting technique 198
.........................................................................................................Common network problems 199
Case Studies
.............................................................................................................................General advice 209
.................................................Case study: Crossing the divide with a simple bridge in Timbuktu 212
.......................................................................................Case study: Finding solid ground in Gao 215
..............................................................................................Case Study: Spectropolis, New York 218
...........................................................Case study: The quest for affordable Internet in rural Mali 223
......................................................................Case study: Commercial deployments in East Africa 230
.................................................................................................................Appendix A: Resources 237
...................................................................................................Appendix B: Channel Allocations 243 ...展开收缩
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