simulation of wireless network systems
design and performance of 3g wireless networks and wireless lans
Ngày tải lên :
01/06/2014, 00:46
... computer networks and various forms of information technologies around the world, a partial fulfillment of Bush’s 1945 dream “memex” of a personal microfiche-based system to tackle the problem of information ... the number of countries and institutions attending the conferences Table Participation summary of ICADL conferences ICADL 1998 # of Papers 23 # of Papers from Asia 18 # of Countries # of Countries ... design and development of digital library systems, addressing users, requirements and context of use Section V consists of five chapters xii In Chapter XV, “Usability of Digital Libraries in...
- 416
- 336
- 0
Báo cáo hóa học: " A New MAC Protocol with Pseudo-TDMA Behavior for Supporting Quality of Service in 802.11 Wireless LANs" docx
Ngày tải lên :
22/06/2014, 22:20
... Member of the academic staff of the Department of Electrical and Computer Engineering of the University of Patras and holds the position of Associate Professor Since 2004, he has been the Director of ... Number of terminals EDCA analysis EDCA simulation Proposed model analysis Proposed model simulation AC0 10 Number of terminals EDCA analysis EDCA simulation Proposed model analysis Proposed model simulation ... Electrical Engineering and Computer Science in the University of Patras, Greece His main interests are wireless networks, quality of service, and network management Ioannis Papapanagiotou has been studying...
- 9
- 428
- 0
Mạng nội bộ Wireless LANs
Ngày tải lên :
01/09/2013, 10:43
... Mục Lục I Lịch sử Wireless LANs Trang II Giới thiệu Wireless LANs Trang III Các chuẩn Wireless LANs Trang IV Thiết bị Wireless LANs Trang V.Nhu cầu cần thiết Wireless LANs Trang 13 VI ... mạng Hình 1: Các mô hình Wireless Network Năm 1997, the Institute of Electrical and Electronic Engineers (IEEE) phác thảo chuẩn 802.11 cho WLANs (Wireless Local Area Networking) WLAN mạng cục ... Trang 24 IX Ưu nhược điểm Wireless LANs Trang 27 X WiFi đạt tốc độ Ethernet Trang 28 XI Mạng LAN không dây tiến vào tương lai Trang 29 I Lịch sử Wireless LANs Wireless network giao thức mạng kết...
- 31
- 522
- 0
Economics of Wireless Networks
Ngày tải lên :
29/09/2013, 21:20
... for wireless telecommunication companies This chapter overviews several economic aspects of wireless networks, including economic benefits of wireless networks, facts that affect the economics of ... in Multi-Service Wireless Networks, Master Thesis, Department of Microelectronics and Information Technology Royal Institute of Technology of Sweden, 2001 Economics of Wireless Networks 397 [3] ... Economic Benefits of Wireless Networks Due to their ability to reduce overall networking costs, wireless networks can produce significant economic benefits for operators, compared to wired networks It...
- 25
- 286
- 0
Simulation of Wireless Network Systems
Ngày tải lên :
29/09/2013, 21:20
... number of variates generated as a Poisson variate 13.7 Case Studies This section presents examples on the simulation of wireless networks These are the simulation of an IEEE 802.11 wireless LAN, simulation ... been proposed Simulation of Wireless Network Systems Figure 13.12 365 Number of voice channels versus load for a delay of 100 ms which will allow the network manager to trade quality of voice calls ... number of nodes increases This is a general result of the CSMA scheme We can also see that the normalized Figure 13.4 Throughput versus offered load for a Mbps WLAN Simulation of Wireless Network Systems...
- 40
- 328
- 1
Fundamentals of Wireless Communication
Ngày tải lên :
20/10/2013, 07:15
... an inefficient utilization of the available degrees of freedom in the system: bits 47 are packed into smaller number of dimensions instead of spreading into larger number of dimensions as in the ... d[2]2 between the received codewords to be of the order of 1/SNR This event holds roughly when both |h[1]|2 d[1]2 and |h[2]|2 d[2]2 are of the order of 1/SN R, and this happens with probability ... gain, there is a law of diminishing marginal return: as L increases, the marginal benefit decreases because of the law of large numbers, eventually converging to the performance of the AWGN channel...
- 20
- 541
- 0
The Future of Wireless Banking Implementation of Wireless Banking and Financial Systems
Ngày tải lên :
26/10/2013, 16:15
... Resource Locator Wireless Application Environment Wireless Application Protocol WAP Binary XML Wireless Control Message Protocol Wireless Wireless Markup Language Wireless Session Protocol Wireless Telephony ... the data easily, securely, and independent of a network operator or handheld device The Future of Wireless Banking Ron Ghani What are the components of a wireless system? • Handheld devices • Connectivity, ... for data presentation in the proof of concept stage The Wireless Application Server is not an Internet server nor an extension to the Internet: The explosion of the wireless application industry...
- 16
- 562
- 0
Lecture 2 Wireless Environment and Wireless LANs
Ngày tải lên :
29/10/2013, 06:15
... to maximize aggregate utilization of available capacity) Wireless Environment and Wireless LANs 14 Effects of Mobility home network wide area network visited network Figure from Kurose & Ross ... basic operation of IEEE 802.11 and Bluetooth WLANs/WPANs ■ More detailed discussion of operation of such networks will be provided in later lectures Wireless Environment and Wireless LANs Agenda ... Spread Spectrum ■ Direct Sequence Spread Spectrum Wireless Environment and Wireless LANs Agenda (2) ● Wireless networks ■ Mobile wireless WANs ■ Fixed wireless WANs ■ WLANs: the 802.11 family ■ WLANs/WPANs:...
- 51
- 303
- 0
Tài liệu The Future Of Wireless Banking (pdf) doc
Ngày tải lên :
21/12/2013, 02:15
... Resource Locator Wireless Application Environment Wireless Application Protocol WAP Binary XML Wireless Control Message Protocol Wireless Wireless Markup Language Wireless Session Protocol Wireless Telephony ... the data easily, securely, and independent of a network operator or handheld device The Future of Wireless Banking Ron Ghani What are the components of a wireless system? • Handheld devices • Connectivity, ... for data presentation in the proof of concept stage The Wireless Application Server is not an Internet server nor an extension to the Internet: The explosion of the wireless application industry...
- 16
- 671
- 0
Tài liệu Designing for Profitability in the Physical Layer of Wireless Networks docx
Ngày tải lên :
21/12/2013, 08:17
... Designing for Profitability in the Physical Layer of Wireless Networks Introduction Growth in wireless services is increasing the number of copper and fiber cables that must ... layer of the wireless network is getting larger and more complex With more wireless data services come smaller coverage areas, increasing the number of cell sites as well as the number of copper ... capabilities for the network, the Network Planning organization has an important impact upon meeting the needs of subscribers – the external customers Too often, however, network planning occurs...
- 8
- 609
- 0
Tài liệu Chapter 14 Wireless LANs pptx
Ngày tải lên :
16/02/2014, 20:20
... Physical layer of IEEE 802.11 FHSS 14.23 Figure 14.16 Physical layer of IEEE 802.11 DSSS 14.24 Figure 14.17 Physical layer of IEEE 802.11 infrared 14.25 Figure 14.18 Physical layer of IEEE 802.11b ... wireless LAN technology designed to connect devices of different functions such as telephones, notebooks, computers, cameras, printers, coffee makers, and so on A Bluetooth LAN is an ad hoc network, ... hidden station 14.17 Figure 14.11 Use of handshaking to prevent hidden station problem 14.18 Figure 14.12 Exposed station problem 14.19 Figure 14.13 Use of handshaking in exposed station problem...
- 34
- 1.7K
- 0
Báo cáo khoa học: "Techniques to incorporate the benefits of a Hierarchy in a modified hidden Markov model" pptx
Ngày tải lên :
08/03/2014, 02:21
... task the number of observation symbol relies on the number of part -of- speech tags contained in training data Figure plots the relationship of micro-average F -measure for three types of models (A: ... tasks of identifying the syntactic structure of text chunking and grammar parsing with previously annotated text documents It analyses the use of HHMMs—both before and after the application of improvement ... calculating the dependency of each possible phrase The outcome of this restructuring is to reduce the complexity of the hierarchical structure and reduce the number of levels in the hierarchy...
- 8
- 528
- 0
The Benefi ts of Biotechnology: Scientifi c Assessments of Agricultural Biotechnology’s Role in a Safer, Healthier World
Ngày tải lên :
13/03/2014, 21:57
... of the effects of soy protein intake on serum lipids N Engl J Med 1995 Aug 3;333(5):276-82 32 Zhan S, Ho SC Meta-analysis of the effects of soy protein containing isoflavones on the lipid profile ... limited number of farmland soil types and in a limited number of U.S latitudes prior to the arrival of biotech crops, the biggest environmental impact of biotech crops has been the adoption of no-till ... translate into a consumer benefit of food products with zero grams of trans fat High Isoflavone Soybeans A wide body of research indicates multiple health benefits of consuming soy, including: alleviating...
- 28
- 286
- 0
The Do’s and Don’ts of Entering a Relationship
Ngày tải lên :
14/03/2014, 14:02
... – This right here is one of the most common causes of unhappy relationships, but it’s also one of the toughest things to stop yourself from doing if you’re in the heat of the moment Now although ... the time comes, you make a lot of effort to be polite and friendly towards your partner’s friends and family The amount of uncomfortable situations that can come of their friends or family not ... too? So you get to spend ANY time with your new partner?? Well of course, I’m just getting these out of the way now because they are often overlooked Me time is something that isn’t always talked...
- 86
- 286
- 0
Identification of Research Needs Relating to Potential Biological or Adverse Health Effects of Wireless Communication pptx
Ngày tải lên :
15/03/2014, 15:20
... president of the National Academy of Sciences The National Academy of Engineering was established in 1964, under the charter of the National Academy of Sciences, as a parallel organization of outstanding ... development of models of several heights for men, women, and children of various ages for use in the characterization of SAR distributions for exposures characteristic of cell phones, wireless PCs, ... rapid growth in the number of base stations, there has been a growth of other sources of RF radiation from cordless phones and wireless systems The last general survey of RF levels in U.S cities...
- 79
- 344
- 0
future prediction of wireless technology using nano devices
Ngày tải lên :
15/03/2014, 23:50
... of surface plasmon frequency of gold nanoparticles, using nematic liquid crystals [J Muller et al, Appl Phys Lett 81, 171 (2002).] Schematic of experimental configuration Measured deviation of ... melon config, 22 mev) Propagating Waves of Surface Plasmons in Chains of Nanoparticles A chain of closely spaced metallic nanoparticles allows WAVES of surface plasmons to propagate down ... comparison of unlinked and aggregated Au nanoparticles Absorptance of unlinked and aggregated Au nanoparticles, as measured by Storhoff et al [J Am Chem Soc 120, 1959 (1998)] Description of Previous...
- 44
- 495
- 2
Wi foo the secrets of wireless hacking
Ngày tải lên :
19/03/2014, 13:37
... publicly exposing insecure wireless networks and raising public awareness of wireless security issues Many of them could actually become (or already are) wireless networking professionals and security ... independent / ad-hoc wireless networks as well as can distinguish between common IEEE 802 standards Describing the basics of networking or detailed operations of wireless networks will constitute ... security of 802.11 standards-based wireless networks and not other packet-switched radio communications Figure 1-1 presents an overview of wireless networks in the modern world, with 802.11 networks...
- 753
- 772
- 0