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Title:
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PERFORMANCE ANALYSIS OF WAVELENGTH ASSIGNMENT ALGORITHMS IN IP OVER DWDM NETWORKS |
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Author(s):
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Ramla Ahmad |
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ISBN:
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972-9027-53-6 |
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Editors:
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Pedro Isaías |
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Year:
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2002 |
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Edition:
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Single |
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Keywords:
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Wavelength Add/Drop Multiplexers, Multi-protocol Label Switching, RWA problem, Optical Cross Connects. |
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Type:
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Short Paper |
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First Page:
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795 |
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Last Page:
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798 |
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Language:
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English |
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Cover:
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Full Contents:
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click to dowload 
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Paper Abstract:
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Today there are many challenges faced by the telecommunication industry. The traffic rate is increasing much faster than the capacity provided in the networks. To overcome this problem, the concept of Internet Protocol (IP) over Dense Wavelength Division Multiplexing (DWDM) has been introduced. It can increase the capacity of existing networks and reduce the cost of network upgrades. It also supports the concept of
all-optical network. However, as the system has limited number of wavelengths available, re-usability of wavelengths is required. This causes one of the major problems of DWDM networks called the Routing and Wavelength Assignment (RWA) problem. RWA is divided into two sub-problems: to find the best possible route and to assign wavelength to that route.A number of algorithms exist for these sub-problems. Another important issue related with DWDM networks is the wavelength continuity constraint that does not allow wavelength conversion during the transfer of data over a route. It is imposed because the wavelength converters are expensive hardware and introduce latency. This results in an increase in the blocking probability. However, providing conversion capability to a subset of nodes improves the performance considerably. |
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