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Designing a Wireless network Foreword xxv From Past to Present 1 Introduction 2 Exploring Past Discoveries That Led to Wireless 4 Discovering Electromagnetism 4 Exploring Conduction 6 Inventing the Radio 6 Mounting Radio-Telephones in Cars 8 Inventing Computers and Networks 9 Inventing Cell Phones 11 Exploring Present Applications for Wireless 12 Vertical Markets 13 Using Wireless in Delivery Services 14 Using Wireless for Public Safety 14 Using Wireless in the Financial World 15 Using Wireless in the Retail World 15 Using Wireless in Monitoring Applications 16 Applying Wireless Technology to Horizontal Applications 16 Using Wireless in Messaging 17 Using Wireless for Mapping 17 Using Wireless for Web Surfing 17 Exploring This Book on Wireless 18 xiii Summary 19 Solutions Fast Track 20 Frequently Asked Questions 21 Chapter 2 Radio Elements and Frequency Spectrums 23 Introduction 24 Learn the Properties of Transmitting Radio Signals Over EM Waves 24 Waveforms Anatomy of a Waveform 25 Modulating a Radio Signal 27 a = Amplitude Propagating a Strong Radio Signal 34 v = Velocity of Propagation Understanding Signal Power and τ = Period Signal-to-Noise Ratio 35 λ = Wavelength Attenuation 36 ? = Frequency Rain Attenuation 39 Bouncing 39 Refracting 41 Line of Sight 42 Penetration 43 Understanding the Wireless Elements 45 Generic Radio Components 45 Antennas 49 Omnidirectional Antennas 50 Directional Antennas 51 Base Stations and Mobile Stations 56 Access Points 57 Channelizing the Frequency Spectrum 57 Channelizing 59 Channel Bandwidth 59 Channel Spacing and Buffer Zones 60 Multichannel Systems and Channel Offsets 61 Extending the Number of Channels (Frequency Reuse) 61 Seven Cell Frequency Reuse 62 Multiple Accessing 63 152_wan_toc 6/22/01 4:54 PM Page xv Contents xv Regulating Wireless Communications 64 Regulatory Agencies 64 The Need to Know 65 Regulations for Low Power,Unlicensed Transmitters 66 Summary 68 Solutions Fast Track 69 Frequently Asked Questions 71 Chapter 3 TCP/IP and the OSI Model 73 Learn to Configure Introduction 74 and Maintain Routes Exploring the OSI and DoD Models 74 for Full Connectivity Layer 1:The Physical Layer 75 Layer 2:The Data-Link Layer 75 PC Layer 3:The Network Layer 77 Layer 4:The Transport Layer 78 T3 A T1 Layer 5:The Session Layer 78 F T3 E B Layer 6:The Presentation Layer 79 D T3 Layer 7:The Application Layer 80 T1 C T3 OSI and DoD Correlation 81 Understanding the Network Access Layer 81 Server Using Bridging 82 The Ethernet Protocol 85 Static Routing in a Understanding the ARP Process 86 Multihop, Multipath Network Wireless Protocols 87 Other Network Access Protocols 88 Understanding the Internet Layer 88 The Internet Protocol 89 IP Addressing 91 Conserving Address Space with VLSM 93 Routing 95 The Internet Control Message Protocol 101 Understanding the Host-to-Host Layer 101 User Datagram Protocol 102 Transmission Control Protocol 102 Managing the Application Layer 105 Monitoring Tools:SNMP 105 152_wan_toc 6/22/01 4:54 PM Page xvi xvi Contents Assigning Addresses with DHCP 105 Conserving with Network Address Translation 106 Summary 110 Solution Fast Track 111 Frequently Asked Questions 113 Chapter 4 Identifying Evolving Wireless Technologies and Standards 115 Understand Bluetooth Introduction 116 Piconet and Scatternet Fixed Wireless Technologies 117 Configuration Multichannel Multipoint Distribution Service 117 Local Multipoint Distribution Services 119 Scatternet Wireless Local Loop 120 Piconet 1 Piconet 2 Point-to-Point Microwave 121 Legend P S SB SB Wireless Local Area Networks 122 Master M S Slave 10 m S M M S Why the Need for a Wireless LAN Standard? 123 P Parked S S Standby SB What Exactly Does the 802.11 Standard S P Define? 125 Does the 802.11 Standard Guarantee Compatibility across Different Vendors? 128 802.11b 130 802.11a 131 802.11e 132 Developing WLANs through the 802.11 Architecture 133 The Basic Service Set 133 The Extended Service Set 135 Services to the 802.11 Architecture 135 The CSMA-CA Mechanism 138 The RTS/CTS Mechanism 138 Acknowledging the Data 139 Configuring Fragmentation 140 Using Power Management Options 140 Multicell Roaming 140 Security in the WLAN 141 152_wan_toc 6/22/01 4:54 PM Page xvii Contents xvii Developing WPANs through the 802.15 Architecture 143 Bluetooth 144 HomeRF 147 High Performance Radio LAN 147 Mobile Wireless Technologies 148 First Generation Technologies 150 Second Generation Technologies 150 2.5G Technology 150 Third Generation Technologies 151 Wireless Application Protocol 151 Global System for Mobile Communications 153 General Packet Radio Service 155 Short Message Service 155 Optical Wireless Technologies 156 Summary 157 Solutions Fast Track 159 Frequently Asked Questions 163 Chapter 5 Designing a Wireless Network 165 Introduction 166 Create a Detailed Exploring the Design Process 166 Physical Design Conducting the Preliminary Investigation 167 Performing Analysis of the Existing Equipment model Environment 168 Cabling details Creating a Preliminary Design 169 Rack details Finalizing the Detailed Design 169 Environment Executing the Implementation 170 requirements Capturing the Documentation 171 Physical location of Identifying the Design Methodology 172 devices Creating the Network Plan 173 Detailed RF design Gathering the Requirements 173 Baselining the Existing Network 175 Analyzing the Competitive Practices 176 Beginning the Operations Planning 176 Performing a Gap Analysis 176 Creating a Technology Plan 177 152_wan_toc 6/22/01 4:54 PM Page xviii xviii Contents Creating an Integration Plan 178 Beginning the Collocation Planning 178 Performing a Risk Analysis 179 Creating an Action Plan 179 Preparing the Planning Deliverables 180 Developing the Network Architecture 180 Reviewing and Validating the Planning Phase 181 Creating a High-Level Topology 181 Creating a Collocation Architecture 182 Defining the High-Level Services 182 Creating a High-Level Physical Design 183 Defining the Operations Services 183 Creating a High-Level Operating Model 184 Evaluating the Products 184 Creating an Action Plan 185 Creating the Network Architecture Deliverable 186 Formalizing the Detailed Design Phase 186 Reviewing and Validating the Network Architecture 186 Creating the Detailed Topology 187 Creating a Detailed Service Collocation Design 188 Creating the Detailed Services 188 Creating a Detailed Physical Design 189 Creating a Detailed Operations Design 190 Creating a Detailed Operating Model Design 190 Creating a Training Plan 191 Developing a Maintenance Plan 192 Developing an Implementation Plan 192 Creating the Detailed Design Documents 192 Understanding Wireless Network Attributes from a Design Perspective 193 Application Support 194 Subscriber Relationships 196 152_wan_toc 6/22/01 4:54 PM Page xix Contents xix Physical Landscape 197 Network Topology 200 Network Security 201 Summary 203 Solutions Fast Track 204 Frequently Asked Questions 206 Chapter 6 Designing a Wireless Enterprise Use Two Wireless Network: Hospital Case Study 209 Outdoor Routers to Introduction 210 Create Redundancy Applying Wireless in an Enterprise Network 210 Introducing the Enterprise Case Study 211 To Building 100 To Main Hospital11 Mbps link Building 100 Router Assessing the Opportunity 211 To Building 101 To Building 101 Evaluating Network Requirements 213 To Building 200 Main Hospital Router Assessing the Satellite Buildings’Physical To Building 201 Landscape 214 To Building 300 Evaluating the Outside Physical Landscape 214 To Building 301 Evaluating the Current Network 216 Evaluating the Hospital Conference Room Networking Landscape 216 Designing a Wireless Solution 217 Project 1:Providing Satellite Building Access 218 Project 2:Providing Wireless Technology to the Conference Rooms 219 Project 3:Providing Building-to-Building Connectivity 220 Describing the Detailed Design of the Building Links 222 Implementing and Testing the Wireless Solution 224 Project 1:Implementing the Satellite Building LAN Access 224 Project 2:Implementing the Hospital Conference Room 224 Project 3:Implementing the Building-to-Building Connectivity 225 Reviewing the Hospital’s Objectives 227 Lessons Learned 228 152_wan_toc 6/22/01 4:54 PM Page xx xx Contents Summary 229 Solutions Fast Track 230 Frequently Asked Questions 232 Chapter 7 Designing a Wireless Industrial Network: Retail Case Study 233 Create an Installation Introduction 234 Checklist and Verify the Steps on the List Applying Wireless Technology in an Industrial Network 235 Set up the IP Introducing the Industrial Case Study 235 information Assessing the Opportunity 236 Install the access points Defining the Scope of the Case Study 238 Install the AP Manager Reviewing the Current Situation 238 software Designing and Implementing the Wireless Test the wireless Network 239 network Creating the High-Level Design 239 Review the client’s Creating a Detailed Design 240 objectives Obtaining a Physical Map 242 Determining User Density 247 Identifying Constraints 248 Conducting the Walk-Through 249 Identifying RF Interface Sources 249 Plan the RF Pattern for the Network 249 Planning the Equipment Placement 250 Determining Where to Place the Access Points 251 Determining the RF Channel Optimization 254 Identifying IP Addresses 255 Implementing the Wireless Network 255 Selecting the Hardware 256 Installing the Wireless Components 258 Setting Up IP Information 258 Installing the Access Points 258 Install the AP Manager Software 260 Installing the PC Card in Shipping/ Receiving 260 152_wan_toc 6/22/01 4:54 PM Page xxi Contents xxi Testing the Wireless Network 260 Reviewing the Client’s Objectives 261 Lessons Learned 262 Summary 263 Solutions Fast Track 264 Frequently Asked Questions 266 Chapter 8 Designing a Wireless Campus Network: University Case Study 269 Introduction 270 Applying Wireless Technology in a Campus Network 270 Introducing the Campus Case Study 271 Establish High-Level Assessing the Opportunity 271 Inter-Building Defining the Scope of the Case Study 272 Connectivity Designing the Wireless Campus Network 273 The Design Approach 273 Field House (Basketball) Liberal Arts Determining the Functional Design Requirements 273 Engineering Biological Sciences Tracking the Administration Needs 274 Tracking the Athletic Needs 275 inistration Building Adm Student Union Tracking the Academic Department Needs 276 Internet Tracking Student Union Needs 277 200 Meters Tracking Student Needs 277 StadiumDorms Constraints and Assumptions 277 Identifying the Assumptions 279 Identifying the Constraints 281 Planning the Equipment Placement:Detailed Design Requirements 283 Providing Detailed Administration Requirements 283 Providing Detailed Athletic Department Requirements 285 Providing Detailed Academic Department Requirements 288 152_wan_toc 6/22/01 4:54 PM Page xxii xxii Contents Providing Detailed Student Union Department Requirements 290 Providing Detailed Student Requirements 291 Implementing the Wireless Campus Network 292 Implementing the Physical Deployment 293 Implementing the Logical Deployment 294 Lessons Learned 295 Summary 296 Solutions Fast Track 297 Frequently Asked Questions 299 Chapter 9 Designing a Wireless Home Network: Home Office Case Study 301 Learn to Build a Introduction 302 Wireless Home Network Advantages of a Home Network 302 Advantages of a Wireless Home Network 304 Assembling the Introducing the Wireless Home Network network components Case Study 305 Determining Assessing the Opportunity 305 Broadband Defining the Scope of the Case Study 306 configuration Designing the Wireless Home Network 306 Installing the hardware Determining the Functional Requirements 307 Installing and Determining the Needs of Management 307 configuring the Determining the Needs of the Family 308 software Talking to the IT Department 308 Testing the network Creating a Site Survey of the Home 309 Assessing the Functional Requirements 310 Analyzing the Existing Environment 310 Identifying Current Technology Options and Constraints 312 Investigating Costs 313 Weighing Costs and Benefits 313 Assessing the Existing Environment 314 Developing a Preliminary Design 315 Choosing Vendor Solutions 317 Developing a Detailed Design 318 Implementing the Wireless Home Network 319 152_wan_toc 6/22/01 4:54 PM Page xxiii Contents xxiii Assembling the Network Components 319 Determining Broadband Configuration 320 Installing the Hardware 321 Installing and Configuring the Software 322 Installing and Configuring the Software for the Home Firewall 322 Installing and Configuring the Software for the Wireless Access Point 324 Testing the Network 326 Designing a Wireless Home Network for Data, Voice,and Beyond 326 Current State of the Home Wireless Marketplace 327 A Proposed Solution for the Future 329 Lessons Learned 330 Summary 332 Solutions Fast Track 332 Frequently Asked Questions 335 Designing a Wireless Network Fast Track 337 Index 357

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Designing a Wireless Network

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