مشاهده مشخصات مقاله
A Novel QoT-Aware Routing and Wavelength Assignment Algorithm in All-Optical Networks
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نویسنده (ها) |
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Amir Kakekhani
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Akbar Ghaffar Pour Rahbar
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مربوط به کنفرانس |
چهاردهمین کنفرانس بینالمللی سالانه انجمن کامپیوتر ایران |
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چکیده |
In WDM all-optical networks, physical impairments
degrade optical signal to noise ratio (OSNR). Therefore,
the quality of a lightpath must be checked during
connection setup. Since during a lightpath setup, it may
inject crosstalk on all previously established lightpaths
with which it shares links or nodes, OSNR for those
lightpaths should be checked as well as the OSNR of the
tentative lightpath. If the number of hops for a lightpath
increases, the amount of OSNR degradation increases
due to crosstalk. Hence, longer paths are subject to
higher QoT degradation due to crosstalk. In this paper,
we enhance OSNR degradation for different lightpaths
with different hop numbers in such a way that OSNR
degradation for long-hop lightpaths becomes closer to
short-hop lightpaths, i.e., a fair OSNR degradation. We
provide a mechanism to estimate crosstalk risk at the
routing process by which we can find the nodes with
positive crosstalk risk. Then, rerouting procedure is used
to reduce the crosstalk risks of these nodes by migrating
some of lightpaths that pass through the nodes. |
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قیمت |
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برای اعضای سایت : ۱٠٠,٠٠٠ ریال
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برای دانشجویان عضو انجمن : ۲٠,٠٠٠ ریال
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برای اعضای عادی انجمن : ۴٠,٠٠٠ ریال
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