ABSTRACT
CONTENTS 6.1 Introduction ............................................................................................. 104 6.2 Need for a Standard-Based Broadband Wireless Access .................. 104
6.2.1 Increasing Demand for Broadband Access ............................. 105 6.2.2 Lack of Available Options in Underdeveloped Areas ........... 105 6.2.3 Problems with Proprietary BWA Solutions ............................ 105 6.2.4 Improving Anytime Anywhere Access to Data ..................... 105 6.2.5 Constraints with Wired Broadband ......................................... 106 6.2.6 Improving Business Models ..................................................... 106
6.3 Network Architecture of WiMAX ........................................................ 106 6.3.1 Working Principle ....................................................................... 106 6.3.2 WiMAX Deployment Model ..................................................... 106 6.3.3 Cell Structure ............................................................................... 107 6.3.4 WiMAX Base Station (BS) .......................................................... 108 6.3.5 Customer Premise Equipment (CPE) ...................................... 108 6.3.6 Mesh Topology ............................................................................ 108
6.4 Advantages of WiMAX .......................................................................... 108 6.4.1 Economic Advantages ............................................................... 108 6.4.2 Technical Advantages ................................................................ 110
6.5 Applications of WiMAX as a Last-Mile Solution ............................... 111 6.6 WiMAX Design Challenges ................................................................... 112
6.6.1 TDD, FDD, or H-FDD ................................................................ 112 6.6.2 Error Vector Magnitude ............................................................. 113 6.6.3 RF Architecture ........................................................................... 114 6.6.4 Chip Design Options .................................................................. 114 6.6.5 Regulatory Issues ........................................................................ 114 6.6.6 Cost ............................................................................................... 114 6.6.7 Spectrum Availability ................................................................. 115 6.6.8 Spectrum Interference ................................................................ 115
6.7 WiMAX as a Solution to 4G: Introduction .......................................... 115 6.8 Evolution of 4G ....................................................................................... 116
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6.9 Viability of WiMAX as an Alternative to 3G and Migration Toward 4G ................................................................................................ 117
6.10 Characteristics of 4G/WiMAX Network ............................................. 118 6.11 Impact of Similar Technologies on WiMAX ........................................ 120 6.12 VoIP Services of Wi-Fi/WiMAX ........................................................... 121
6.12.1 Vo Wi-Fi ...................................................................................... 121 6.12.2 Mobile WiMAX ......................................................................... 121 6.12.3 Hybrid Cell Phones .................................................................. 121
6.13 Various Deployments Scenarios of WiMAX ....................................... 122 6.13.1 WiMAX Micro-Cells Formed with Wi-Fi (Migration
Path toward 4G) ........................................................................ 122 6.13.2 Deployment of Mobile WiMAX (Complete 4G) .................. 123
6.14 WiMAX Enables Rural Telecommunication Infrastructure: Introduction ............................................................................................. 124
6.15 The Suggested Remote ICT System with WiMAX ............................ 125 6.15.1 Description about the New System ....................................... 125
6.16 Advantages of the Remote ICT System with WiMAX ...................... 127 6.17 Significant Need for Remote ICT System with WiMAX ................... 128 6.18 General Suggestions ............................................................................... 129 6.19 Conclusion ............................................................................................... 130 References ........................................................................................................... 130
Access to Internet is of prime importance as it has turned into a fully converged network delivering voice, audio, image, and video in addition to data. WiMAX extends the reach of IP broadband metropolitan fiber networks well beyond the relatively small local area network (LAN) coverage of Wi-Fi in offices, homes, or public access hot spots to rural areas. WiMAX is expected to provide flexible, cost-effective, standards-based means of filling existing gaps in broadband coverage, and creating new forms of broadband services not envisioned in a “wired’’ world. WiMAX is widely viewed as a “great wireless hope’’ for outdoor wireless services, and the disruptive potential of WiMAX looks set to revolutionize the entire broadband wireless access (BWA) industry. In this part, we analyze the need for a BWA technology and provide you with the advantages of WiMAX as a last-mile solution.
