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

More documents

Recommendations

Info

5.4. Overall analysis Table 5-9 is the basic information of FSUWIN, WiFly and WiBro. FSU and Taipei use the same standard; Taipei and Seoul belong to the same area. In technical field, Taipei should use WiMax not Wi-Fi, because it is not designed for metropolitan area. Even if WiFly upgrades to the IEEE 802.11n in the future, the overall performance is not going to improve too much. It is like carrying seven people in car with four seats; it can work, but not very well. So the best way is to replace the system to WiMax or combine with WiMax. In Seoul, WiBro’s major problem is mobility and it is also the selling point. Using WiMax to cover a city is a suitable way. It is what WiMax designed for. Even though WiBro’s overall performance is not as good as expected so far, the technical issues are solvable by new devices and technologies. As for cost and service problems, it is the same road and bridge issues with WiFly. Both WiFly and WiBro are WISPs and the best way for them to survive in future Internet market is to integrate with ISPs. FSUWIN is the most successful case within these three cases. In the future, after installing the central controller, OTC can easily monitor the network status and provide more reliable service. FSUWIN reached its goal and does a good job. One more factor of FSUWIN’s success is no financial burden. It is not a commercial network and is supported mainly by tuition. Thus it does not have to worry about users and application issues. This feature makes its operation simpler than other two systems. In short, it is a good solution for smaller and local area. So far WiFly and WiBro are still seeking their marketing positioning. 3G, Wi-Fi, WiMax and wired internet service where the balance point for these technologies is an important issue to industries, manufactures and researchers. Table 5-10 is the basic information for internet access methods. The service providers and WISP should not only focus on providing content but also have to think about the demand of wireless network users. Based on the patterns of people’s behaviors accessing the Internet, these technologies should be coexisted. Figure 5-21 is an example for using these technologies. When a man wants to go to a state park and has the Internet access all the way, he has to bring his phone and NB. At home he can use Wi-Fi to collect the information of the state park. During transportation, he can access the Internet by mobile-WiMax. And then, when he arrives the state park, he can still check his email by fixed-WiMax service. If he wants to take a rest, he can stay in the state park service center where Wi-Fi is available. Moreover, all the way, he can make a video phone call anywhere at any time. It is one possibility for future development. WiFly and WiBro were just commercialized. They have to learn from mistakes, because they are the pioneers of public wireless network. The technical issues they have right now are all solvable. WiBro can showed its real capacity only after the mobility is truly functional and devices price is acceptable. WiFly can adopt WiBro’s technologies to improve its signal and coverage issues. The wireless city story has not finished yet, and WiFly and WiBro still have a chance for success. 94
Figure 5-21 An Example Application of 3G, Wi-Fi and WiMax 5.5. Other developing wireless network In U.S., Sprint Nextel has announced to cooperate with Samsung, Motorola and Intel will build a national-wide 4G broadband mobile network. They are going to invest $1 billion in 2007 and between $1.5 billion and $2 billion in 2008. In China, they are developing their own 4G standard, McWill. It is not an international standard and has a worse performance than WiMax. The Chinese government set many restrictions on WiMax and wants to develop their own standard, so in short term, WiMax is not going to develop in China. In Europe, England started to install fixed-WiMax since 2005. There are two companies in the projects, Telebria and Community Internet (CI). Japan issued three WiMax licenses at the end of 2006. They are KDDI, NTT DoCoMo and Yozan. Taiwan issued six WiMax licenses and split into two area, North district and South district. The test service will be launched in 2008. 95
Page 1 and 2:
THE FLORIDA STATE UNIVERSITY COLLEG
Page 3 and 4:
TABLE OF CONTENTS List of Tables…
Page 5 and 6:
5. Case study…………………
Page 7 and 8:
LIST OF FIGURES Figure 2-1 The Evol
Page 9 and 10:
LIST OF ABBREVIATIONS Abbreviation
Page 11 and 12:
PSS Portable Subscriber Station 89
Page 13 and 14:
CHAPTER ONE 1. Introduction The cel
Page 15 and 16:
Table 1-1 Cont. 802.3an 2006 10GBAS
Page 17 and 18:
2.1. Introduction CHAPTER TWO 2. 3G
Page 19 and 20:
2.3. Development 3G has been in dev
Page 21 and 22:
2.5. Conclusion WAP (Wireless Appli
Page 23 and 24:
IEEE 802.11n is the newest standard
Page 25 and 26:
Table 3-3 Cont. 10 2.457 X Y Y Y Y
Page 27 and 28:
3.3.1.2. PLCP and PMD The physical
Page 29 and 30:
Noise Codes). The most powerful con
Page 31 and 32:
Figure 3-5 CCK Modulation HR-DSSS P
Page 33 and 34:
other problem is inter-carrier inte
Page 35 and 36:
Tab ble 3-5 OFDDM Modulaation and D
Page 37 and 38:
and contains DSSS, CCK, PBCC (Packe
Page 39 and 40:
3.3.2. MAC Layer 3.3.2.1. Introduct
Page 41 and 42:
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 and 94: • -101 dBm typical @ 1 Mbps Recei
Page 95 and 96: Operating environment specification
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: In KT’s recent report, 60% of sub
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
show all

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

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?