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

More documents

Recommendations

Info

mobility. On the other hand, WiMax has the biggest coverage, highest data rate and also support mobility. [69][78] The applications of 3G partially overlap with Wi-Fi and WiMax. 3G is a mobile phone technology, so its main stage is in the cell-phone market; internet access is only an additional benefit. 3G’s signal will fade out fast when there are too many people in the nearby area tring to access the Internet at the same time. 3G’s interface is mainly onthrough the cell-phone. Considering the operation convenience, it is tolerable for checking or sending e-mail, time tables, or MMS. However for high throughput applications, 3G appears to be not as good as the other two standards. The cell-phone’s inborn limitation, keyboard and screen size, makes it unsuitable for internet access. Moreover, 3G’s data rate and bandwidth are not fast enough for internet use. 2.4. Cases Japan is a successful case for 3G development and mobile Internet access and there are some unique reasons for this. Japanese 3G service was started in late 2001 called FOMA (Freedom of Mobile Multimedia Access) by NTT DoCoMo. FOMA is the brand name of NTT DoCoMo’s 3G service. As the network coverage rate became higher and higher, most Japanese started to get used to checking and sending e-mail as well as getting daily information by phones. This phenomenon especially happens during rush hours in mass transit systems. Teenagers also like to share secrets, pictures and gossip by e-mail and MMS. Therefore, FOMA has become part of life and Multimedia service is the major applications of 3G. The most popular service in Japan now is called i-mode, it was in 2G and then upgrade to 3G. [69][76] – [78] The 3G service in Korea is called JUNE. It is pushed by SKT (South Korea Telecom) in November 2002 and based on CDMA2000 1X EV-DO. Similar to Japan, it is also focused on multimedia service. In August 2003, just 8 month later, the users already increased to one million. JUNE has a music channel, video channel, MMS service and NOUL (Korean Idol). It is the first service which realizes the commercial video phone-call. [69] In Taiwan, 3G cell-phones have become the main stream and the system also has upgraded completely. However, because of Wi-Fi and WiMax, telecommunication industries are still seeking where the business and balance point are. It is a true struggle in the communication market. Varieties of websites and software fit users’ different demands on the Internet. But with cell-phones, internet service is only provided by telecommunication industries and is very limited and not universal. In addition, because the cell-phones’ specifications are not unified, such as in the revolution of screen resolution and numbers of buttons, it is more difficult to design web pages as well as to promote the service. In Japan, the cell-phones are more unified, so it is easier to popularize mobile Internet access service. [69][76] – [78] 8
2.5. Conclusion WAP (Wireless Application Protocol) is the previous model of mobile Internet access service, but it did not become as popular as “i-mode”. Poor contents and costly usage rate are two major reasons. 3G may revive it again, but it is an important lesson about the relationship between people and mobile Internet access service. Do people really need to use cell-phones to access the Internet? This is one of the key points for 3G’s future. And then after the final goal of 3G network is done, the All IP network, what will be the impact of the tele-market will be an important observation point. Video phone-call is the major selling point of 3G. However there is a problem: who wants to be seen on thea phone call? Who wants to be awakened when the boss calls in the morning and be seen on the phone? Privacy is very important issue for everyone, but video phone-call has potential risk to break it. Therefore, it may take a long time for people to get used to it. In Taiwan, it has taken five years to get people used to the idea of pulling over to make a phone call and talking on the street. Currently, 99.9% population in Taiwan have a cell-phone. 3G still has a long way to go, because it takes time to change life styles and in most places in the world 3G has just arrived. 9
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: 2.3. Development 3G has been in dev
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 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
show all

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

Create successful ePaper yourself

Delete template?

Save as template?