Group Shared Protection (GSP) A Scalable Solution for Spare Capacity Reconfiguration in Mes.pdf

Group Shared Protection (GSP): A Scalable
Solution for Spare Capacity Reconfiguration in
Mesh works

Anwar Haque1, Pin-Han Ho1,2, Raouf Boutaba1, and James Ho2

School puter Science, University of Waterloo, Ontario, N2L3G1, Canada1
Department of Electrical puter Engineering, University of Waterloo, Ontario, N2L3G1, Canada 2

Abstract--This paper proposes a novel framework of shared obtaining a higher degree of sharing and limiting the number
protection, namely Group Shared Protection (GSP), in mesh of lightpaths subject to a single failure at a given instant of
Wavelength Division Multiplexing (WDM) networks with
dynamically arrived connection requests. Based on the (M:N)n time. GSP is also expected to significantly reduce the control
control architecture, GSP has n mutually independent protection overhead in terms of spare capacity management by sub-
groups, each of which containing N SRLG-disjoint working paths grouping working lightpaths in works into multiple
protected by M protection paths. Due to the SRLG-disjointedness protection groups.
of the working paths in each protection group, GSP not only These unique features of the GSP scheme create the basis
allows the spare capacity to be totally sharable among the
corresponding working paths, but also reduces the number of for providing an efficient solution to deal with single failure