TITLE:
Probabilistic Selection of QoS Paths for Improving Survivability in MPLS Networks
AUTHORS:
Ravindra Kumar Singh, Narendra S. Chaudhari, Kanak Saxena
KEYWORDS:
MPLS; Label Switched Paths; Fault Tolerance; Survivability
JOURNAL NAME:
Communications and Network,
Vol.5 No.4,
November
20,
2013
ABSTRACT: Many applications do not fit well with the traditional best
effort packet delivery policy of the Internet. These include applications
such as Internet telephony and video conferencing which require voice and bulky graphical images transfer. Therefore,
the policies of assigning traffic to various service classes and
providing service as per the service level agreement of the user with
the network provider came into existence. Multi-protocol Label
Switching is the backbone of fast switching technology that
helps the network service providers to implement these policies. It
provides Quality of service oriented reserved paths from the
source to the destination for the user’s traffic. Selection of these
paths is a cumbersome task, especially when the traffic forecast is
totally unknown. Furthermore, nodes and link failures in the Internet
worsen the situation. This paper addresses the issue of
selecting Label Switched Paths (LSPs) for various traffic demands in
the network so that the resultant network has the characteristics
like high failure resistance, low LSP demand blocking
probability, low impact from the node or link failure, load balancing and
low over-all resource utilization. By extensive simulations, the
proposed cost function has been compared with the various cost
functions mentioned in the literature and it was found to score over them
in major aspects.