Optical networks based on WDM technology
offer the promise to satisfy the bandwidth requirements of
the Internet infrastructure, and provide the bandwidth
needs of future applications in the local and wide area
networks. The network performance is now mainly limited
by the processing capability of the network elements, which
are mainly electronic. Traffic streams from users generally
(in Mbps) have a data-rate that is far less than bandwidth of
optical fibers (in Tbps) or that of a light-path in optical
fibers. This mismatch of bandwidths between user needs
and wavelength capacity makes it clear that some
multiplexing should be done to use the wavelength capacity
efficiently, which will result in reduction on the cost of line
terminating equipment (LTE). Multiplexing low bandwidth
traffic request onto high capacity wavelength channel is
called as traffic grooming. Unlike full grooming, in which
each node is capable of grooming (called as G-node), sparse
grooming employs only a few grooming nodes in the network
without a significant reduction in performance. Traffic
grooming in particular sparse grooming optimizes the cost
and reduces the network complexity by reducing the
grooming hardware with optimal network performance.
Here, we present some heuristic algorithms to perform Gnode
selection and grooming in a WDM optical network
using dynamic traffic along with load balancing. We show
by our simulation results that network throughput (or
blocking probability) almost as same as full grooming can be
achieved using sparse grooming. We also compare the
performance of the proposed algorithm with the earlier
available approaches and our simulation results show that
our algorithm provides performance as good as the present
approaches.
Sachin Barhate : Working as a assistant professor in J T
Mahajan polytechnic. Faizpur. Maharashtra. He had completed his
B.E. in Electronics and telecommunication and pursing ME from in
Electronics and telecommunication from North Maharashtra
University Jalgaon. Maharashtra. INDIA.
Prof. (Dr). A M Patil : Working as a associate professor in J T
Mahajan College of Engineering. Faizpur. Maharashtr He had
completed his B.E. in Ind.Electronics and M.E. in Electronics and in
2013 Ph. D. Electronics from North Maharashtra university Jalgaon.
Maharashtra. INDIA.
Line Terminating Equipment (LTE) SONET/SDH
Synchronous Optical Network (SONET)/Synchronous Digital
Hierarchy (SDH)
Dense Wavelength Division Multiplexing
(DWDM) Integer Linear Programming (ILP)
NSF-NET.
Optical wavelength-division multiplexing is a promising
technology to accommodate the explosive growth of
Internet and telecommunication traffic in wide-area,
metro-area, and local-area networks. While a single fiber
strand has over a terabit-per second bandwidth and a
wavelength channel has over a gigabit-per-second
transmission speed, the network may still be required to
support traffic connections at rates that are lower than the
full wavelength capacity. Typically, the cost of a nationwide
optical network is dominated by optical transponders
and optical amplifiers. If one assumes that the fiber routes
are fixed, then the amplifier cost is constant, in which
case one should concentrate on minimizing the number of
transponders in the network. Though the number of
transponders has been used as an objective function in
many studies on ring networks, it has not been considered
at all for mesh networks. The objective functions that
have been considered for mesh networks so far include:
the blocking probability, the total number of wavelengths
required, and the total route distance.
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Performance of WDM Mesh Net-works with Limited
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Optical Networks, in Proc. IEEE International
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