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

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Adj djacent subccarriers are used u by thiss method too form subchhannels. AMMC can quiickly elect a modulaation and cooding combiination per subchannell, when it iss used with fast feedbaack channel. The subbchannels of AMC ccan use thee “water-poouring” typpes of algorrithms, and d it can bee combinned with an AAAS optionn. Tabble 4-6[53] is the summmary of the AMC subcaarrier allocaation parammeters. 4.3.2.22. MAC LLayer 4.3.2.22.1. QooS Table 4-6 UL-DDL Adjacennt Subcarrieer Permutatiion (optionaal AMC) The e functions of the QoSS of the IEE EE 802.16-22005 includde the old foour schemess and a neww one schheme, extennded real-timme polling service (errtPS). This scheme is only defined in IEEEE 802.16ee-2005 MAAC-layer. It combines tthe advantagges of UGSS and rtPS. This methood allocatess 56
the uplink bandwidth periodically for MS and with this feature ertPS can coordinate data services which the bandwidth requirements change with time. [50][121][127][128] 4.3.2.2.2. Power-saving How to extend the battery life is a very important issue of mobility. Therefore power management is a fundamental requirement of a mobile wireless network. The IEEE 802.16e- 2005 defines two modes to operate power saving. [50][129] – [132] 4.3.2.2.2.1. Sleep Mode This mode is an optional mode of WiMax power management. The MS is defined by two statuses, sleep window and listen window. The sleep window is defined as when a MS temporarily disconnects to the BS for a predetermined period of time. The listen window is following the sleep window, during which the MS reconnects to the BS. The lengths of each sleep and listen window depend on the power-saving classes and is negotiated between the MS and BS. When the MS is in sleep window, this period is called unavailability interval. During the unavailability interval, the MS cannot receive any DL transmission and send any UL transmission. During the availability interval when the MS is in listen window, the MS can receive DL transmission and send UL transmission as normal. BS will not send any DL transmission to MS when it is in sleep window, therefore the MS can turn off one or more physical components for saving power. The BS buffers the SDUs (Service Data Units) for MS and transmits them later to the MS during availability interval. For different services, there are three power-saving classes: 1. Power-saving class type 1 Class type 1 is used for BE or nrtPS connections. In this class, the listen window size is fixed and followed by a sleep window. Each sleep window size is twice the size of the previous sleep window, but not bigger than the final sleep window size. The size of the initial sleep window and the final sleep window are notified to the MS by the BS before the power-saving class type 1 begins. During the sleep mode, the BS can reset the window size to the initial sleep window size at any time. For UL allocations, the reset process happens under the request from the MS. And for DL allocations, it happens when the BS finds out that the number of listen window is not enough for the traffic. 2. Power-saving class type 2 57
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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: transmiission, the aadjacent cellls
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
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