A comparison of wi-fi and wimax with case studies - Florida State ...

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auxiliary of extending the ADSL to end users in short range. Unless there is a unique application that only WiFly can do; otherwise keep seeking new service to increase users is still no help. ADSL and WiFly are like roads and bridges, but if WISP tries to use bridges to replace roads; then there is no future for WiFly. Taipei’s city government and Q-ware now are trying to use new VoIP service (Taipei easy call) and WiFly cube to attract more users. [76] – [78][85] However the fundamental problem is why WiFly. There are other choices for indoor wireless internet service, such as Hinet-WLAN and 3G wireless. It is like selling a game station without games and the price is also way too high. For temporary users, $3.20 for one day access is too expensive; not to mention carrying the NB and looking for signal. WiFly’s unique feature is its ubiquitous connection, but if the feature cannot be used stably and conveniently; then it is still useless. 5.2.4. Conclusion WiFly tries to provide make people’s lives more convenient. However, it still has fundamental problems to be conquered. How to provide end users more stable connection and higher speed should be the current mission of WiFly. And the customers have to find out whether they need WiFly or not. Taiwanese network market is already saturated and has many competitors, so if WiFly wants to take the market share it will be not easy. Since Wi-Fi has some limitations and the original design is for home use; thus it is difficult to use as the last mile of the network and the city-wide coverage. Since the mother company of WiFly, FAREASTONE, has gotten the operation license of WiMax; the next step of WiFly should be the WiMax infrastructure installation. By adopting WiMax, WiFly may be able to have much better performance and show its real value. 5.3. Wibro in South Korea 5.3.1. Introduction WiBro (Wireless Broadband Access Service) is a WBA technology. It is a standard extended from 802.16-2004 and 802.16 2005 and uses many techniques the same with them. Figure 5- 14[79]. It has better coverage and stronger mobility than WLAN and higher data rate than 3G. However, 3G has better coverage than WiBro and WLAN has higher data rate than 3G. Therefore WiBro’s position is just in the middle. It can fix their weaknesses, but cannot replace them. This standard was developed by KT (Korean Telecoms Industry) and standardized by TTA (Telecommunications Technology Association) later on. The manufacturers who are contracted to produce WiBro devices are Samsung, LG, POSDATA and so on. For extending transmission range and decreasing dead spot, the TDD 86
epeater r is developping and it will have two versionn, optical reppeater and RF repeaterr. Figure 5- 15[79] shows the nnetwork struucture of WWiBro. The related workks : [134][1335] 5.3.2. History Figure 5-14 The Relat tionship Beetween WiMMax and WiBBro Figuure 5-15 Thhe Network Structure off WiBro Thi is project wwas initiateed by manu ufacturers ( (Samsung aand LG) aand telecom mmunicationn industriies (KT andd SKT). It sstarted fromm 2003 to 20005. They tootal investeed approximmately thirtyy six milllion dollars in this projject. The first stage staandardizatioon was commpleted by TTA T in latee 87
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THE FLORIDA STATE UNIVERSITY COLLEG
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TABLE OF CONTENTS List of Tables…
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5. Case study…………………
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LIST OF FIGURES Figure 2-1 The Evol
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LIST OF ABBREVIATIONS Abbreviation
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PSS Portable Subscriber Station 89
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CHAPTER ONE 1. Introduction The cel
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Table 1-1 Cont. 802.3an 2006 10GBAS
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2.1. Introduction CHAPTER TWO 2. 3G
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2.3. Development 3G has been in dev
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2.5. Conclusion WAP (Wireless Appli
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IEEE 802.11n is the newest standard
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Table 3-3 Cont. 10 2.457 X Y Y Y Y
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3.3.1.2. PLCP and PMD The physical
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Noise Codes). The most powerful con
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Figure 3-5 CCK Modulation HR-DSSS P
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other problem is inter-carrier inte
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Tab ble 3-5 OFDDM Modulaation and D
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and contains DSSS, CCK, PBCC (Packe
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3.3.2. MAC Layer 3.3.2.1. Introduct
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Virtual channel sensing he other me
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SIFS (Short InterFrame Spacing) Fig
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Figure 3-20 WEP Frame and Operation
Page 47 and 48: 3.4.2. MIMO (Multiple-Input/Multipl
Page 49 and 50: 4.1. The background of IEEE 802.16
Page 51 and 52: The working groups of WiMax Forum a
Page 53 and 54: Table 4-1 Thee Basic Datta of IEEE
Page 55 and 56: Figure 4-1 The Layer Structure of I
Page 57 and 58: codes ( (CTC) and low densityy pari
Page 59 and 60: 4.3.1.2.2. AAS (Advanced Antenna Sy
Page 61 and 62: Best-effort service (BE) This schem
Page 63 and 64: Encryption Figure 4-4 PKM Protocol
Page 65 and 66: 4.3.2. IEEE 802.16e-2005, the newes
Page 67 and 68: transmiission, the aadjacent cellls
Page 69 and 70: the uplink bandwidth periodically f
Page 71 and 72: Figure 4-7 Coverage and Capacity fo
Page 73 and 74: CHAPTER FIVE 5. Case study This cha
Page 75 and 76: increased bandwidth, fixed connecti
Page 77 and 78: Figure 5-3 Landis Green Figure 5-4
Page 79 and 80: Table 5-2 Xirrus XS-3700 AP Technol
Page 81 and 82: • Automatic Tx power selection
Page 83 and 84: Table 5-4 Cont. 71
Page 85 and 86: 5.1.3. Analysis The FSU wireless ne
Page 87 and 88: since the January 2006. The populat
Page 89 and 90: Table 5-5 Parameters of WLAN and Me
Page 91 and 92: Table 5-6 Features of Nortel Wirele
Page 93 and 94: • -101 dBm typical @ 1 Mbps Recei
Page 95 and 96: Operating environment specification
Page 97: uilding density, high population de
Page 101 and 102: Figure 5-17 WiBro Features The data
Page 103 and 104: Figure 5-19 U-RAS Premium Figure 5-
Page 105 and 106: In KT’s recent report, 60% of sub
Page 107 and 108: Figure 5-21 An Example Application
Page 109 and 110: Name Parameters Standard Table 5-10
Page 111 and 112: WiFly used Wi-Fi to cover 60% of th
Page 113 and 114: BIBLIOGRAPHY [01]. IEEE 802.11 offi
Page 115 and 116: [37]. Sun, Y.; "Bandwidth-efficient
Page 117 and 118: [88]. Mineno T.; Babji T.,"Issues a
Page 119 and 120: [117]. Yun Z.; Yuguang F., "Securit
Page 121 and 122: Network Operations and Management S
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