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

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• Wired network interface: Auto sensing 10/100BaseT Ethernet, 1.5kV surge protection per IEC60950 • Power input nominal: 100V - 240V AC (45Hz – 65Hz) Power consumption • Operating: Indoor or outdoor > 0°C = 8W typical Outdoor < 0°C = 8W – 14W (- 40°C) • Startup: Indoor or outdoor > 0°C = 8W typical Outdoor < 0°C = 24W (short duration) 8W– 14W (- 40°C) Dimensions (without mounting brackets or antennas) • 265mm (10.5 inches) tall x 200mm (8 inches) diameter • Weight: 2.4 kg (5.3 lbs) • Color: Gray Optional accessories • Mounting brackets (right-angle or straight horizontal attachment) • 5m, CAT5 Ethernet indoor/outdoor rated cable for network access point (NAP) operation • Street light photo-electric control power tap 'luminaire' 120/208/240 V • 13dBi, 18dBi and 23dBi TL external antennae Wireless Gateway 7250 Technical Specifications Standard: • 128 MB memory • Processor - 850 MHz • PCI expansion slot - one (available for additional Ethernet interface or hardware accelerator card) • LAN/WAN interfaces Two 10/100 BaseT Ethernet Management/console (DB9) Optional: • One additional 10/100 BaseT Ethernet interface (provides additional LAN/WAN connectivity, if required by network design) • 128 MB RAM upgrade • Hardware encryption accelerator card Physical specifications: • Length: 21 in. (53.3 cm) • Width: 17.25 in. (43.8 cm) • Height: 3.5 in. (8.9 cm) • Weight: 10.0 lb. (4.5 kg) 82
Operating environment specifications: • Electrical: 90-264 VAC, 2.0 @ 90 VAC, 47-63 Hz • Temperature: 32°-104° F (0°-40° C) • Relative humidity: 10-90% non-condensing 5.2.3. Analysis The WiFly has been in operation for about 21 months. As of the end of August 2007, there were one hundred and fifty thousand registered customers with an average of six thousand users per month. The population coverage is 96% (two million six hundred thousand people) and the number of APs are 4600. [72] This is the biggest wireless network construction in the world. However, there were many complaints since the first day of service. There are several reasons. First, the signal is unstable with too many dead spots. Second, coverage is concentrated in metropolitan areas; the geographic coverage is only 50%. Third, the signal path is too unpredictable. This is because of the multipath fading and signal reflection. Forth, the price is too high and lacks service applications. These problems can be classified as two parts, mechanical and marketing. The mechanical part includes signal stabilization, AP coverage and security; the marketing part contains service applications and pricing rate. [76] – [78][85] Compared with the population coverage, the numbers of user is very low. Table 5-7. This project spent a total of approximately thirty million dollars, but ended up facing a low usage situation. Taiwan has a strong manufacturing background and in the 1980s and 1990s, MIT (Made in Taiwan) became a well known mark around the world. With this ability, the infrastructure installation is not a difficult job at all. WiFly is a first city-wide wireless network project; therefore since there is no precedent to learn from, WiFly has to learn through trial and error. [76] – [78][85] Date Terms Table 5-7 The Numbers of Subscribers Registered Users Active Users Industry Customer 2006/6 45,000 20,000 N/A 2007/1 110,000 35,000 70 2007/8 150,000 6,000 (monthly) N/A In the mechanical problem part, the signal is the first problem. It is what most customers complain about. This problem is caused by many factors, such as the number of users, weather, environment, AP locations, and RF interference. This is a common difficulty of all wireless 83
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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
Page 43 and 44: SIFS (Short InterFrame Spacing) Fig
Page 45 and 46: 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: • -101 dBm typical @ 1 Mbps Recei
Page 97 and 98: uilding density, high population de
Page 99 and 100: epeater r is developping and it wil
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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