نتایج جستجو برای: wavelength division multiple access wdma

تعداد نتایج: 1185732  

2014
Mudavath Raju Naresh Kumar D. R. Rana Yen-Feng Li Guu-Chang Yang M. Yamada N. Takeuchi K. Sakumoto Frank G. Shi Leon Cohen

Optical code division multiple access (OCDMA) is one of the most upcoming technologies for future multiple access techniques along with WDMA and OTDMA. Optical CDMA offers greater scalability than other optical multiplexing technique and it provides flexible quality of service and data access security. OCDMA requires increasing demand for high speed, large capacity communications in optical net...

1992
Kalyani Bogineni Patrick W. Dowd

This paper introduces a collisionless wavelength division multiple access protocol for a passive star-coupled photonic network and shows that it possesses significant performance and flexibility advantages over alternative approaches. A performance modeling technique is introduced, basedon a semi-markov analytic model, that eliminates many of the unrealistic assumptions of past approaches to an...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس 1386

چکیده ندارد.

2009
J. Larry Spencer

Optical wavelength division multiplexing (WDM) systems, with signals transmitted on different wavelengths through a single optical fiber, can have increased bandwidth and fault isolation properties over single wavelength optical systems. This paper considers two WDMsystem designs that might be used with multimode fibers and gives a general descripton of the components which could be used to imp...

2003
Henrik Lundqvist

The optical fiber is a very attractive communication medium since it offers a large bandwidth and low attenuation and can therefore facilitate demanding services such as high-quality video transmission. As the reach of optical fiber is being extended to the access network it is economically attractive to share fibers between different users without adding active components in the network. The m...

1997
F. Ayadi

We propose an optical WDMA/CDMA hybrid high bandwidth local area network using coherent homodyne detection. Local injection locking to centralized highly stable sources is used for frequency selection and coherent detection. Splitting losses in a fully connect optical local area network are significant for large systems (~1000 subscribers) necessitating the use of optical amplifiers. We examine...

1993
Nathaniel Grossman Nicholas Bambos Richard R. Muntz Leonard Kleinrock Mario Gerla

of the Dissertation HONET: An Integrated Services Wavelength Division Optical Network by Milan Mihailo Kova cevi c Doctor of Philosophy in Computer Science University of California, Los Angeles, 1995 Professor Mario Gerla, Chair We investigate a class of high-speed ber-optic local and metropolitan area network architectures that can support a wide range of applications, namely: datagram (e.g., ...

2003
IOANNIS E. POUNTOURAKIS

In this paper, we study the effect of the round trip propagation delay on performance measures of WDM networks and adopt a dynamic policy and a synchronous transmission procedure to access data channels. Also we propose a new control architecture for WDM star-coupled networks, to overcome the electronic processing bottleneck that the single control channel architecture introduces. Key-Words: Wa...

2003
Martin Maier

Current SONET/SDH metro ring networks create the so–called metro gap which prevents high– speed clients from tapping into the vast amounts of bandwidth available in the backbone. To bridge this gap we propose and investigate by means of analysis and simulation a novel arrayed– waveguide grating (AWG) based single–hop wavelength division multiplexing (WDM) network with a physical star topology. ...

1999
Justin Macfarlane Krzysztof Pawlikowski Harsha Sirisena

Many medium access control protocols have been proposed for optical wavelength division multiplexing local area networks with a star topology. These protocols range from those based on the concept of fixed-assignment of communication subchannels, such as TDMA (Time Division Multiple Access); random-access to communication subchannels, such as DTWDMA (Dynamic Time-Wavelength Division Multiple Ac...

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