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

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Internet access using the wide availability of the cellular telephone networks. These factors make it really difficult to predict the future of wireless Internet access. In this thesis, the focus is primarily implementations of IEEE 802.11 and IEEE 802.16. In chapter 2, 3G will be discussed briefly, but the low data rate of current 3G implementations limit it’s applicability for general wireless Internet access. And for clarifying the capabilities of Wi-Fi and WiMax, this thesis will include three case studies. The case studies are the FSU (Florida State Univ.) campus Wi-Fi network, the city-wide Wi-Fi network in Taipei, Taiwan, and the city-wide WiMax network in Seoul, Korea. By comparing these three cases, the design problems and operation difficulties can be identified. Taipei and Seoul are both the first complete citywide wireless network in the world. The current statuses of their networks reflect the capabilities of WiMax and Wi-Fi. By study these case studies, this paper is going to evaluate the feasibility of building a Wireless Networked City using WiMax and/or Wi-Fi. 4
2.1. Introduction CHAPTER TWO 2. 3G 3G stands for “third generation of mobile phone standards and technologies”. It was developed under the IMT-2000 program (IMT, International Mobile Telecommunication) by the International Telecommunication Union (ITU). 3G has three standards, WCDMA (Wideband Code Division Multiple Access), CDMA2000 and TD-SCDMA (Time Division - Synchronized Code Division Multiple Access). Also, 3G’s network is a wide area cellular telephone network. It can provide internet access and video telephone. Compared to 2G, the 3G has higher bandwidth and faster speed. With this advantage, 3G can provide varieties of service. 3G supports both fixed and mobile environment and is also backward compatible with 2G. [68][69][136] – [138] When doing vocal transmission, 3G can use Circuit Switch Mode for voice and video phone; for internet access/data transmission, 3G uses Packet Switch Mode. In this mode, users pay for how much they used, for example 0.099 cents per packet. Multimedia Message Service (MMS) is an important application of 3G. Although MMS has been applied to General Packet Radio Service (GPRS) as the 2.5G major application, with 3G’s advantages, wireless communication companies can provide more choices (video, audio, pictures and text) with MMS. 2.2. Technologies 2.2.1. WCDMA WCDMA was developed by an organization called 3GPP (3 rd Generation Partnership Project, December 1998) and also a part of IMT-2000 program. The WCDMA is based on GSM (Global System for Mobile Communications/Pan-European digital cellular land mobile telecommunication system) and GPRS. GSM is based on Circuit Switch Mode and GPRS is based on Packet Switch Mode. In Europe, WCDMA is called Universal Mobile Telecommunications System (UMTS). This technology came from the early third generation wireless network studies in Japan and Europe. Since the GSM was such a success, Europe began actively working on developing 3G. In 1995, Europe established Advanced Communications Technologies and Services (ACTS) for research and development of 3G. Also, in Japan the Association of Radio Industries and Businesses (ARIB) was established in 1993 as a committee for studying and developing Japan’s 3G technology. The WCDMA has several versions, R99, R4, R5 and the following ones. [69][139] – [141] 5
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: Table 1-1 Cont. 802.3an 2006 10GBAS
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
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Figure 4-7 Coverage and Capacity fo
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CHAPTER FIVE 5. Case study This cha
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increased bandwidth, fixed connecti
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Figure 5-3 Landis Green Figure 5-4
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Table 5-2 Xirrus XS-3700 AP Technol
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• Automatic Tx power selection
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Table 5-4 Cont. 71
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5.1.3. Analysis The FSU wireless ne
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since the January 2006. The populat
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Table 5-5 Parameters of WLAN and Me
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Table 5-6 Features of Nortel Wirele
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• -101 dBm typical @ 1 Mbps Recei
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Operating environment specification
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uilding density, high population de
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epeater r is developping and it wil
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Figure 5-17 WiBro Features The data
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Figure 5-19 U-RAS Premium Figure 5-
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In KT’s recent report, 60% of sub
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Figure 5-21 An Example Application
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Name Parameters Standard Table 5-10
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WiFly used Wi-Fi to cover 60% of th
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BIBLIOGRAPHY [01]. IEEE 802.11 offi
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[37]. Sun, Y.; "Bandwidth-efficient
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[88]. Mineno T.; Babji T.,"Issues a
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[117]. Yun Z.; Yuguang F., "Securit
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Network Operations and Management S
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