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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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e an electronic buffer. TF or instance, a buffer for N packets with a FIFO discipline can be implemented using N delay lines of different lengths. D delay line 1 delays a packet for one time slot. A counter kee the track of the number packets in the buffer. Suppose the value of the counter is j when a packet arrives at the buffer, then the packet will be routed to the jâ„¢th delay line. Limited by the length of the delay lines, this type of the buffer is very small, and does not scale up.
5.2.2. Exploiting the wavelength domain:
In WDM several wavelengths run on a fiber link that conne..................[:=> 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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and the LMM node lifetime problem. Therefore, it is sufficient to solve only one of the two problems. Important insights can be obtained by inferring duality results for the other problem.
Technology to use:JAVA..................[:=> 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
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e no of wavelengths that can be coupled together on to a single fiber continues to increase. For instance, it is expected that in a year there will be as many as 200-wavelengt/fibres.
5.2.3. deflection routing:-
Deflection routing is ideally suited to switches that have little buffer spaces. When there is a conflict between two packets, one will be routed to the correct output port. In this way. Little or no buffer is needed. However the deflected packet may end up following a longer path to destination since they are likely to arrive out of sequence.
6. OPTICAL PACKET SWITCH..................[:=> 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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switching:
Here data is sent as packets .Due to this fact, there is an efficient utilization of the communication line. The earlier problem of waiting does not occur here as more than one source can use the line at the same time.

All data to be transmitted is first assembled into one or more messages units called packets, by the source DTE.These packets include both source&destination DTE to its local packets switching exchange (EXE).On receipt of each packets, the exchange first stores the packet and then inspects the destination address it contains . Each PSE containing routing directory..................[:=> 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,
N out going fiber links, with n wavelengths running on each fiber link. The switch is slotted, and the length of the slot is such that an optical packet can be transmitted and propagated from an input port to an out put optical buffer.

The switch fabric consists of three parts; optical packet encoder, space switch, and optical packet buffer. The optical packet buffer 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), ..................[:=> 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,
s 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 optical gate open and closing the rest. The information regarding to which wavelength of an incoming packet and the decision as to which ODL of the destination out put buffer the packet will be switched to is provided by the control unit, which ahs knowledge of the state of the entire switch.

Each out put buffer is an optic..................[:=> 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
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fication that works across all wireless network technologies.

To enable the creation of content and applications that scale across a wide range of wireless bearer networks and device types.

To embrace and extend existing standards and technology wherever possible and appropriate.

It is also very important for the WAP Forum's specification in such a way that they complement existing standards. For example, the WAPV1.0 specification is designed to sit on top of existing bearer channel standards so that any bearer standard can be used with the WAP protocols to implement complete product ..................[:=> 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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l to be modulated and used as a communication channel with entropy. The application 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 foll..................[:=> 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,
ence, the main component of the FIR filter algorithm is a dot product: multiply and add, multiply and add. These operations are not unique to the FIR filter algorithm; in fact, multiplication is one of the most common operations performed in signal processing convolution, IIR filtering, and Fourier transforms also all involve heavy use of multiply-accumulate operations. Originally, microprocessors implemented multiplications by a series of shift and add operations, each of which consumed one or more clock cycles. As might be expected, faster multiplication hardware yields faster performance in..................[:=> 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 ,
hort,equal to the duration of an optical packet,OBSN can be seen as resembling an OPSN On the other hand,when all the burst durations are extremely long the OBSN may seem resembling a WRN In OBS there is strong separation between the data and control planes,which allows for greater network manageability and flexibility In addition its dynamic nature leads to high network adaptability and scalability,which makes it quite suitable for transmission of bursty traffic .

In general,the OBS network consists of interconnected core nodes that transport data from various edge users The users consist ..................[:=> 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,
reflected at the interface of the cladding. The only way the light can enter and escape is through the ends of the fiber. A transmitter either alight emitting diode or a laser sends electronic data that have been converted to photons over the fiber at a wavelength of between 1,200 and 1,600 nanometers.

Today fibers are pure enough that a light signal can travel for about 80 kilometers without the need for amplification. But at some point the signal still needs to be boosted. Electronics for amplitude signal were replaced by stretches of fiber infused with ions of the rare-earth erbium. Whe..................[:=> 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 ,
ansmission capacities approach this magnitude may require electronics to run at rates that outstrip Moor's law. The bandwidth mismatch between fiber transmission systems and electronics router will becomes more complex when we consider that future routers and switches will potentially terminate hundreds of wavelength, and increase in bit rate per wavelength will head out of beyond 40gb/s to 160gb/s. even with significance advances in electronic 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..................[:=> 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, plastic memory ppp ,
it is not an open architecture. The Simputer mean while is centered around Linux which is freely available, open and modular...................[:=> 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 transmits digital packet data at 19.2 Kbps, using idle times between cellular voice calls on the cellular telephone network.
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 pr..................[:=> 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 , plastic memory ppp,
e de facto standard PC is quite unsuitable for deployment on the low cost mass market. The entry barrier due to software licensing is just too high. While the Wintel PC provides a de facto level f standardization, it is not an open architecture. The Simputer me..................[:=> 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,
s. With this address, we are virtually always connected to our host without having to keep a constant connection.

There are currently two methods for sending data over cellular networks: cellular ..................[:=> Show Contents <=:]



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