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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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and M combiners connected to the incoming and outgoing fibers, respectively. Each plane is an N*N standard wavelength routing switch as described above. However in the WDM switch an outgoing fiber may carry more than one wavelength. The control part of the switch makes sure that there is no wavelength in the combiner.
6.3.3. The WASPNET Switch:-
This switch is proposed as part of the Wavelength Switch Optical Packet Network (WASPNET) project. The configuration of the WASPNET switch with single wavelength input and out put is shown in figure. It consists of a 2N*2N AWG, N sets of ODLs, and ..................[:=> 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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he 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) technique from linear program (LP), which we call serial LP with Parametric Analysis (SLP-PA). We show that the SLP-PA can be also employed to address the LMM node lifetime problem much more efficiently than a state-of-the-art algorithm proposed in the literature. ..................[:=> 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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router receives a packet for forwarding across the network, it analyses the network layer header, performs applicable network layer services, selects a route for the packets, and applies a tag to the packets. Then it forwards the packets to the tag switch. The tag switch receives the tagged packet and switches the packet bas ed on the tag , without reanalyzing the network layer header .T he packets reaches the tag edge router at the exit point of the network, where the tag is removed and the packet delivered.
7.2 MEMS OPTICAL SWITCHING:
MEMS technology is beginning to impact many ..................[:=> 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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ING

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 for this communication and after that it is broken .The steps involved in the process of circuit switching are
1. Circuit setup
2. The actual communication
3. Clearing of the circuit ..................[:=> 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,
ated 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), 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 ca..................[:=> 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,
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 optical buffer implemented as follows. It consists of d+1 ODLs, numbered from 0 to d. ODL1 delays optical packet for a fixed delay equal to 1 slots. ODL0 provides zero delay, and a packet arriving at this ODL is simply transmitted out of ..................[:=> 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,
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 solutions. When the WAP Forum identifies a new area of technology where a standard does not exist, or exists but needs modification for wireless, it works to submit its specifications to other industry standard groups.



WAP Protocol Stack
Any network is organized as a series of layers or levels where each level performs a specific function. The set..................[:=> 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 as a medium for short-range wireless communications. Currently, IR links and local-area networks available. IR transceivers for use as IR data links are widely available in the markets. Some systems are comprised of IR transmitters that convey speech messages to small receivers carried by persons with severe visual impairments. The Talking Signs system is one such IR remote signage system developed at the Smith-Kettlewell Rehabilitation Engineering Research center. It can provide a repeating, directionally selective voice message that originates at a sign. However, there has been very littl..................[:=> 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,
f-the-shelf microprocessors to field-programmable gate arrays (FPGAs) to custom integrated circuits (ICs).

Programmable DSP processors, a class of microprocessors optimized for DSP, are a popular solution for several reasons. In comparison to fixed-function solutions, they have the advantage of potentially being reprogrammed in the field, allowing product upgrades or fixes. They are often more cost-effective than custom hardware, particularly for low-volume applications, where the development cost of ICs may be prohibitive. DSP processors often have an advantage in terms of speed, cost, ..................[:=> 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 ,
ts of optical packet switching and wavelength routing while taking into account the limitations of current all optical technology In OBS the user data is collected at the edge of the network, sorted based on destination address,and grouped into variable sized bursts Prior to transmitting a burst, a control packet is created and immediately send toward the destination in order to setup a buffer less optical path for its corresponding burst After an offset delay time, the data burst itself is transmitted without waiting for positive acknowledgement from the destination node the OBS framework has..................[:=> 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,
rate, as many wavelengths as possible are jammed down a fiber, with a wavelength 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 r..................[:=> 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 ,
teering capabilities, and signal regeneration capabilities. Examples of how wavelength converters based processors can be used to implement asynchronous packet switching functions are reviewed. Two classes of wavelength converters will be touched on: m..................[:=> 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 ,
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 ,
rs and the telecommunication industry have been experimenting with the use of digital cellular telecommunications 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 spec..................[:=> 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,
to allow rapid development of solutions on any platform.

Features
Simputer is a hand held device with the following features:
- It is portable
- A (320 X 240) LCD Panel which is touch enabled
- A speaker, microphone and a few keys
- A soft keyboard
- A stylus is a pointing device
- Smart card reader in Simputer
- The use of extensive audio in the form of text to speech and audio snippets
The display resolution is much smaller than the usual desktop monitor but much higher than usual wireless devices (cell phones, pagers etc). The operating system for Simputer is Linux. It is design..................[:=> 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,
DPD 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. Data transmitted on the CDPD systems travel several times faster than data send using analog networks

Cellular telephones and modem providers that offer CDPD support make it possible for mobile users to get access to the Internet a..................[:=> Show Contents <=:]



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