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Optical packet switch architectures full report


Posted by: computer science technology
Created at: Wednesday 20th of January 2010 01:07:27 AM
Last Edited Or Replied at :Wednesday 20th of January 2010 01:07:27 AM
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witch architecture can be extended to the case where it has M input and output fibers, and each input and output fiber carries n wavelengths. This is achieved by multiplexing the signal from each incoming fiber to the n wavelengths, and then treating the switch as if it has n*M input wavelengths instead of N represented above. At the output side, each group of n wavelengths can be combined together through a combiner onto the same output fiber.
6.2.2 A Switch With A Broadcast And Select Fabric And Re-circulation Buffer:
The idea of using a re circulation buffer comes from an ATM switch known..................[:=> Show Contents <=:]



RATE DELAY GUARANTEES PROVIDED BY CLOSE PACKET SWITCHES WITH LOAD BALANCING-NETWORK


Posted by: electronics seminars
Created at: Tuesday 12th of January 2010 07:46:40 PM
Last Edited Or Replied at :Thursday 05th of May 2011 04:48:59 AM
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icular, we study the network capacity problem under a given network lifetime requirement. Specifically, for a wireless sensor network where each node is provisioned with an initial energy, if all nodes are required to live up to a certain lifetime criterion, Since the objective of maximizing the sum of rates of all the nodes in the network can lead to a severe bias in rate allocation among the nodes, we advocate the use of lexicographical max-min (LMM) rate allocation. To calculate the LMM rate allocation vector, we develop a polynomial-time algorithm by exploiting the parametric analysis (PA)..................[:=> Show Contents <=:]



Optical packet switch architectures seminar report


Posted by: electronics seminars
Created at: Tuesday 05th of January 2010 03:47:54 AM
Last Edited Or Replied at :Tuesday 05th of January 2010 03:47:54 AM
seminar , Optical packet switch architectures, Optical packet switch architectures seminar report , optical packet switching network, optical packet switch using optsim , optical packet switch architecture, optical packet switch from endicott , optical packet switch network, optical packet switch , optical packet switching, optical packet buffering , optical packet networks, hybrid optical packet infrastructure , optical packet edge, Optical packet , switch, packet , Optical,
kets are delivered in order in the case of cell switching, where as in packet switching the packets may not arrive in order. Cells are 53 bytes long, of which 5 bytes are header and 48 bytes are pay load.
3. PHOTONIC SWITCHING
In photonic switching the signals are kept in optical form, while they are being routed from input to the output. It does not convert optical signals into electrical form for switching purpose. Though the lack of interaction among photons would appear to make photonic switching unrealizable, but fortunately optical non-linearity provides bi-stability, which enables op..................[:=> Show Contents <=:]



Optical packet switch architectures Download Full Report And Abstract


Posted by: computer science crazy
Created at: Saturday 21st of February 2009 02:00:19 PM
Last Edited Or Replied at :Thursday 05th of January 2012 05:12:59 AM
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ded in future networks supporting different forms of data



2. TYPES OF SWITCHING

There are three main types of switching:
1. Circuit switching
2. Packet switching
3. Cell switching

Circuit Switching :
This type of switching is the one used in the field of conventional telephony . In an end-to-end dedicated link is set up before communication starts. This link is solely used f..................[:=> Show Contents <=:]



Optical packet switch architectures


Posted by: computer science crazy
Created at: Monday 22nd of September 2008 02:21:15 PM
Last Edited Or Replied at :Monday 22nd of September 2008 02:21:15 PM
architectures , switch, packet , Optical,
al output fiber. Then, through the space switch fabric, the optical packet can be switched to any of the N out put optical buffers.

Specifically the out put of a TWC is fed to a splitter, which distributes the same signal to N different out put fibbers, one per out put fibber. The signal on each of these out put fibbers goes through another splitter, which distributes this in to d+1 different out put fibbers, and each out put is connected through an optical gate to one of the ODLs of the destination out put buffer. The optical packet is forwarded to an ODL by appropriately keeping one opti..................[:=> Show Contents <=:]



Optical packet switch architectures


Posted by: computer science crazy
Created at: Sunday 21st of September 2008 01:16:13 AM
Last Edited Or Replied at :Sunday 21st of September 2008 01:16:13 AM
architectures , switch, packet , Optical,
fer works as follows. For each incoming fiber link, three is an optical demultiplexer, which divides the incoming optical signal to different wavelengths. Each wavelength is fed to a different tunable wavelength converter ( TWC), which converts the wave length of the optical packet to a wavelength that is free at the destination optical output fiber. Then, through the space switch fabric, the optical packet can be switched to any of the N out put optical buffers.

Specifically the out put of a TWC is fed to a splitter, which distributes the same signal to N different out put fibbers, one pe..................[:=> Show Contents <=:]



Wireless Application Protocol


Posted by: computer science crazy
Created at: Sunday 21st of September 2008 12:37:02 AM
Last Edited Or Replied at :Thursday 29th of November 2012 02:58:17 AM
Protocol, Application , Wireless, www seminar projects com forum electrical seminar topics , wireless application protocol, wap layer architecture ppt , wap ppt, mobile middleware for application development , seminar on wireless application protocol, seminar topics on wireless protocols , seminar report on wireless application protocol2, wirless web application security protocal , wap difference between cnf ind primitive meaning,
els where each level performs a specific function. The set of rules that governs the communication between the peer entities within a layer are called protocols. The layers and protocols together forms th..................[:=> Show Contents <=:]



LED wireless


Posted by: computer science crazy
Created at: Sunday 21st of September 2008 12:34:43 AM
Last Edited Or Replied at :Wednesday 14th of March 2012 01:42:59 AM
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on has to make use of the directional nature of the communication medium because the receiver requires a LOS to the audio system or transmitter. The locations of the audio signal broadcasting system and the receiver are relatively stationary. Since the relative speed between the receiver and the source are much less than the speed of light, the Doppler frequency shift observed by the receiver can be safely neglected. The transmitter can broadcast with viewing angle close to 180 . The frequency of an ON period followed by an OFF period to transmit information is short enough to be humanly unper..................[:=> Show Contents <=:]



High Performance DSP Architectures


Posted by: computer science crazy
Created at: Sunday 21st of September 2008 12:12:14 AM
Last Edited Or Replied at :Sunday 21st of September 2008 12:12:14 AM
Architectures, Performance , High,
e. Often, instructions were stored in the memory bank, while data was stored in another. With this arrangement, the processor could fetch an instruction and a data operand in parallel in every cycle.
Since many DSP algorithms consume two data operands per instruction, a further optimization commonly used is to include a small bank of RAM near the processor core that is used as an instruction cache. When a small group of instructions is executed repeatedly, the cache is loaded with those instructions, freeing the instruction bus to be used for data fetches instead of instruction fetches thus e..................[:=> Show Contents <=:]



Optical Burst Switching


Posted by: computer science crazy
Created at: Sunday 21st of September 2008 12:10:29 AM
Last Edited Or Replied at :Friday 02nd of March 2012 10:36:34 PM
Switching , Burst, Optical , powered by mybb obs, optical burst switching ,
service by varying the preset timers and maximum/minimum burst sizes

One of the most interesting benefit of burst aggregation is it shapes the traffic by reducing the degree of self-similarity,making it less bursty in comparison to the flow of the original higher-layer packets Traffic is considered bursty if busy periods with a large of arrivals are followed by long idle periods The term self-similar traffic refers to an arrival process that exhibits burstiness when viewed at varying time scales:milliseconds,seconds,minutes,hours even days and weeks Self-similar traffic is characterized b..................[:=> Show Contents <=:]



Optical Switching


Posted by: computer science crazy
Created at: Saturday 20th of September 2008 11:58:28 PM
Last Edited Or Replied at :Friday 06th of August 2010 02:21:13 PM
Switching, Optical , seminar optical switching, optical switching , presentation on optical switching,
h carrying as much data as possible. The technology that does this has a name-dense wavelength division multiplexing (DWDM ) - that is a paragon of technospeak.Switches are needed to route the digital flow to its ultimate destination. The enormous bit conduits will flounder if the light streams are routed using conventional electronic switches, which require a multi-terabit signal to be converted into hundreds of lower-speed electronic signals. Finally, switched signals would have to be reconverted to photons and reaggregated into light channels that are then sent out through a designated outp..................[:=> Show Contents <=:]



Optical Packet Switching Network


Posted by: computer science crazy
Created at: Saturday 20th of September 2008 11:55:58 PM
Last Edited Or Replied at :Saturday 20th of September 2008 11:55:58 PM
Network, Switching , Packet, Optical ,
lectronic processor speed, electronics memory access time only improve at the rate of approximately 5% per year, an important data point since memory plays a key role in how packets are buffered and directed through a router.

Additionally opto-electronic interfaces dominate the power dissipations, footprint and cost of these systems, and do not scale well as the port count and bit rate increase. Hence it is not difficult to see that the process of moving a massive number of packets through the multiple layers of electronics in a router can lead to congestion and exceed the performance of e..................[:=> Show Contents <=:]



Simputer


Posted by: computer science crazy
Created at: Saturday 20th of September 2008 11:49:10 PM
Last Edited Or Replied at :Wednesday 19th of March 2014 03:44:32 PM
Simputer , architecture of simputers, simputer architecture , sweet simputer means, the simputer acess device for the masses , simputer pdf, schlumberger payflex reference manual , soft keyboard, phonetics to speech engine used in simputer , how a simputer is used as a smart caed reader, simputer ,
ve to PC's by which the benefits of IT can reach the common man. It has a special role in the third world because it is ensures that illiteracy is no longer barrier in handling a computer. The key to bridging the digital divide is to have shared devices that permit truly simple and natural users interfaces based on sight, touch and studio. The Simputer meets these demands through a browser for the Information Markup Language (IML). IML has been created to provide a uniform experience to users to allow rapid development of solutions on any platform.

Features
Simputer is a hand held device w..................[:=> Show Contents <=:]



Cellular Digital Packet Data


Posted by: computer science crazy
Created at: Saturday 20th of September 2008 11:36:29 PM
Last Edited Or Replied at :Tuesday 27th of November 2012 11:54:02 PM
Data, Packet , Digital, Cellular , cellular digital, in ppt future enhancement of cdpd , cellular digital packet, what is cellular digital packet data and its working , cellular digital packet data,
mmunications as a wireless means to transmit data. The result of their effort is CDPD systems. These systems allow users to transmit data with a higher degree of accuracy, few service interruptions, and strong security. In addition CDPD technology represent a way for law enforcement agencies to improve how they manage their communications and information systems. This results in the capacity for mobile users to enjoy almost instantaneous access to information.

WHAT IS CDPD?

CDPD is a specification for supporting wireless access to the Internet and other public packet-switched networks. D..................[:=> Show Contents <=:]



Simputer


Posted by: computer science crazy
Created at: Saturday 20th of September 2008 11:49:10 PM
Last Edited Or Replied at :Wednesday 19th of March 2014 03:44:32 PM
Simputer , architecture of simputers, simputer architecture , sweet simputer means, the simputer acess device for the masses , simputer pdf, schlumberger payflex reference manual , soft keyboard, phonetics to speech engine used in simputer , how a simputer is used as a smart caed reader, simputer ,
ing new technologies. The common mistake of treating to-operation as a synonym of charity poses its own challenges. The Simputer Licensing Framework is the Trust's responds to these challenges.

What is Simputer?
A Simputer is a multilingual, mass access, low cost, portable alternative to PC's by which the benefits of IT can reach the common man. It has a special role in the third world because it is ensures that illiteracy is no longer barrier in handling a computer. The key to bridging the digital divide is to have shared devices that permit truly simple and natural users interfaces based..................[:=> Show Contents <=:]



Cellular Digital Packet Data


Posted by: computer science crazy
Created at: Saturday 20th of September 2008 11:36:29 PM
Last Edited Or Replied at :Tuesday 27th of November 2012 11:54:02 PM
Data, Packet , Digital, Cellular , cellular digital, in ppt future enhancement of cdpd , cellular digital packet, what is cellular digital packet data and its working , cellular digital packet data,
rk.
CDPD technology represent a way for law enforcement agencies to improve how they manage their communications and information systems. For over a decade, agencies around the world have been experimenting with placing Mobile Data Terminals(MDT) in their vehicles to enhance officer safety and efficiency.

Early MDT's transmits their information using radio modems. In this case data could be lost in transmission during bad weather or when mobile units are not properly located in relation to transmission towers. More recently MDT's have transmitted data using analog cellular telephone modem..................[:=> Show Contents <=:]



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