extending wireless network range with a repeater
Báo cáo toán học: " Opportunistic wireless network coding with relay node selection" pdf
... simple. As a practical implementation of OPNC, Katti et al. [7] introduced a scheme, COPE, that takes advantage of broadcasting nature of wireless communications. COPE employs practical network ... d m }). Each packet a i ẻ S a has its own destination address to be delivered. We assume all nodes in R and D are within co mmunication range from S. At first, the source node S broadcasts n packets ... feedback is perform ed at a packet level instead of a symbol level, and the overhead of the report packets is not too signifi- cant compared to the overall data traffic as can be seen in the example....
Ngày tải lên: 20/06/2014, 21:20
Báo cáo hóa học: " Wireless network positioning as a convex feasibility problem" pot
... Z Tian, GB Giannakis, H Kobayashi, AF Molisch, HV Poor, Z Sahinoglu, Sahinoglu, Localization via ultra-wideband radios: a look at positioning aspects for future sensor networks. IEEE Signal Process ... define A i ={j| reference node j can communicate with target i} and B i = {j|j ≠ i, target j can communicate with target i} as the sets of all reference nodes and targets that can communicate with ... information is a vital requirement for the network to be able to perform in practical applications. Due to drawbacks of using GPS in practical networks, mainly cost and lack of access to satellite...
Ngày tải lên: 20/06/2014, 22:20
Designing A Wireless Network
... on Wireless 18 Apply Wireless Technologies to Horizontal Applications Along with the many vertical markets and applications, you can apply wireless technologies to horizontal applications, meaning ... Service as a Network Systems Engineer bringing his knowledge of the desktop platform and a general understanding of a broad range of technologies in areas such as remote access, ATM, frame relay, and ... site and get accurate information regarding the status of a package. Using Wireless for Public Safety Public safety applications got their start with radio communications for maritime endeavors and other...
Ngày tải lên: 16/10/2013, 13:15
Tài liệu MCSE Study Guide - Designing a Network Infrastructure with Windows 2000 Exam 70-221 ppt
... create the DNS namespace design. Move the appropriate DNS namespaces to the appropriate company domains (Use only namespaces that apply. Use namespaces only once.) A: Corp NAmerica LAmerica corp.hansonrothers.com ... have access to the Internet. Each regional headquarters will contain a domain controller that is configured as a replication bridgehead server. Each Regional administrator team will manage all ... each location, you need to investigate the connectivity options available in that area. ã Assess net available bandwidth and latency issues. Bandwidth is the measure of the amount of data that...
Ngày tải lên: 21/12/2013, 04:19
Báo cáo hóa học: "Research Article Epileptic Seizure Prediction by a System of Particle Filter Associated with a Neural Network" doc
... information of a new seizure is available. Thus the system can adaptively update all related parameters automatically based on available seizure information. From Figure 1, the hidden variable’s value ... state space. A local linearization technique is applied to nonlinear equations and an approximate linear equation is obtained in (16). A series of values of hidden variable x can be obtained based ... limited intracranial EEG data, it has a reliable performance for all six patients including preictal, interictal, and postictal transition data. Application of our method here focuses on the same type...
Ngày tải lên: 21/06/2014, 20:20
Báo cáo khoa học:" In vitro host range, multiplication and virion forms of recombinant viruses obtained from co-infection in vitro with a vaccinia-vectored influenza vaccine and a naturally occurring cowpox virus isolate" pot
... mem- brane), small arrow heads (immature viruses); (D): arrow (plasma membrane), large arrow heads (Golgi apparatus), small arrow (cell associated vesicle); (E): arrow (plasma membrane), arrow ... and Rec 2 infected Vero cells (C-F). (A) : arrow (plasma membrane), arrow heads (IMVs); (B): arrow (plasma membrane), arrow heads (CEVs); (C): arrow (plasma membrane), large arrow head (trans-Golgi ... arrow heads (CEVs); (F): arrow (plasma mem- brane), large arrow heads (EEVs), small arrow head (plasma membrane projection). The same results were obtained with MVA-HANP and Rec 3 (data not shown)....
Ngày tải lên: 12/08/2014, 04:21
Báo cáo khoa học: " In vitro host range, multiplication and virion forms of recombinant viruses obtained from co-infection in vitro with a vaccinia-vectored influenza vaccine and a naturally occurring cowpox virus isolate" pps
... (C): arrow (plasma membrane), large arrow head (trans-Golgi mem- brane), small arrow heads (immature viruses); (D): arrow (plasma membrane), large arrow heads (Golgi apparatus), small arrow ... Nemeckova S, Hainz P, Otahal P, Gabriel P, Sroller V, Kutinova L: Early gene expression of vaccinia virus strains replicating (Praha) and non-replicating (modified vaccinia virus strain Ankara, MVA) ... (cell associated vesicle); (E): arrow (plasma membrane), arrow heads (CEVs); (F): arrow (plasma mem- brane), large arrow heads (EEVs), small arrow head (plasma membrane projection). The same...
Ngày tải lên: 12/08/2014, 04:21
designing a wireless network phần 1 pot
... technology. Around the same time that Faraday worked with electromagnetism, an American professor named Joseph Henry became the first person to transmit a practical electrical signal. As a watchmaker, he constructed batteries ... desktop platform and a general understanding of a broad range of technologies in areas such as remote access, ATM, frame relay, and wireless. In addition, his background includes con- sulting with ... phones, pagers, and wireless Personal Digital Assistants (PDAs) have become so commonplace in our lives that it is easy to forget that ten years ago, they were a rarity. But wireless commu- nications...
Ngày tải lên: 14/08/2014, 14:20
designing a wireless network phần 2 pptx
... data. An example of this is when an animal is tagged with a transmitter and the signal is collected and data is gathered over a period of time to be interpreted at a later date. Monitoring applications ... the signal cannot penetrate metal. Assume you have a metal sphere. As an EM wave hits the leading edge of the sphere, it acts like an antenna, and the wave induces a voltage in the metal.This voltage ... car- rier wave is called the modulated wave because it is the wave that is being changed by the modulating or signal wave. Almost all carrier waves are a periodic sinusoidal wave with a frequency many,...
Ngày tải lên: 14/08/2014, 14:20
designing a wireless network phần 3 ppt
... antennas. Planar Array Antennas Planar array antennas are similar in concept to Yagi antennas except all elements, both active and parasitic, lie in the same plane.This results in a flat antenna that can be mounted ... mounted flat on a wall, yet still have the proper- ties and gain of a directional antenna. Figure 2.17 shows a planar array antenna. www.syngress.com Figure 2.17 Planar Array Antenna and Associated ... Directional Beam Pattern Side View Planar Phased Array Antenna Direction of Beam Antenna G Directional Beam Multiple Antenna Elements Shown with Dipole Antennas Top View Steerable Beam Planar Array...
Ngày tải lên: 14/08/2014, 14:20
designing a wireless network phần 4 pptx
... for maintaining IP addresses, you can get the details necessary to obtain a range. In North America, South America, the Caribbean, and sub-Saharan Africa, the organization responsible is the Address ... routed to a different link. A dynamically routed network is capable of facilitating these types of changes. How is an algorithm aware that the network has changed? Remember that an algorithm ... at www.ripe.net. Lastly, for the Asia/Pacific region, the organization is the Asia/Pacific Network Information Centre (APNIC), which can be found at www.apnic.net. Q: When using PAT, how can I accommodate all...
Ngày tải lên: 14/08/2014, 14:20
designing a wireless network phần 5 pot
... can authenticate a wireless device against a list of MAC addresses.This list could reside locally on the AP, or the authentication could be checked against a database of allowed MACs located on the ... signals do not radiate as far, and as we mentioned, the frequencies are reused as much as we desire as long as the cells are spaced apart appropriately. Mobile technology has developed with various ... Member Address (AMA). Parked nodes are addressed with an 8-bit Parked Member Address, (PMA). Up to ten piconets can be colocated and linked into what is called scatternets. A node can be both a master...
Ngày tải lên: 14/08/2014, 14:20
designing a wireless network phần 6 potx
... their greatest weaknesses.The same can be said when examining the attributes of a wireless network. Both mobility and ease of access are touted as some of the greatest characteristics available when ... work with an issue before escalating it? ■ How will an escalation take place? ■ Which procedures will be automated? ■ What tools are available to which organization? ■ What security changes are ... data that will roam with them. Assessing the Opportunity Jones Hospital & Associates is composed of a group of affiliated primary care doctors and specialists.The hospital operates six leased...
Ngày tải lên: 14/08/2014, 14:20
designing a wireless network phần 7 ppt
... 45-degree angle toward the center of the building. To verify antenna placement, place an access point bridge at each location and test its range with a laptop with a wire- less card. It is helpful ... greater bandwidth, verify that the packets are getting forwarded via the wireless link over the leased T-1 lines. When all six wireless links are installed and are passing traffic, install and ... Office Office Office Break Room AP AP 152_wan_06 6/21/01 3:24 PM Page 219 Designing a Wireless Enterprise Network: Hospital Case Study ã Chapter 6 225 Place the directional antenna so that the antenna energy...
Ngày tải lên: 14/08/2014, 14:20
