A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : EA-HD: A Novel Link State Update Mechanism for ASON
Author(s) : J. Wang
Filename : draft-jpwang-rtgwg-update-mech-00.txt
Pages : 8
Date : 2010-12-20
When a connection request comes in a mesh optical network, the
routers automatically choose the suitable routing paths and
wavelength to it according to the network topology and link state
information saved in its global link state database. Because some
of these wavelengths may be released or occupied at any time, the
global state database is always out of date and needed by update by
some an update policy. A suitable link state update policy is
critical, since that a high frequency update polity imposes heavy
burden on network, while a low frequency one would increase the
inaccurate of the global link state database. In this paper, we
propose a link state update policy, named EA-HD policy, which
considers two index of a link, one is the Hamming distance between
the local link state database and the global link state database,
and another is the used ratio of its wavelengths. The proposed
update policy gets a trade-off between the accurate of link state
information and its update cost. Simulation proves that our scheme
achieve a good performance in traffic blocking probability while
maintaining moderate volume of update traffic.
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