Link repair in managed multi‐domain connections with end‐to‐end quality guarantees

Abstract

SUMMARY The Internet is a platform providing connection channels for various services. Whereas for services like email the best‐effort nature of the Internet can be considered sufficient, other services strongly depend on service‐specific connection quality parameters. This quality dependence has led to dedicated content distribution networks as a workaround solution for services like YouTube. Such workarounds are applicable to a small number of services only. With the global application of the Internet, the impact of quality of service varies from annoyance due to jitter in VoIP communication to endangering human lives in telemedicine applications. Thus network connections with end‐to‐end quality guarantees are indispensable for various existing and evolving services. In this paper we consider point‐to‐point multi‐domain network connections for which the end‐to‐end quality has to be assured. Our contribution includes the classification of fault cases in general and countermeasures against end‐to‐end performance degradation. By correlating events and reasonable countermeasures, this work provides the foundation for quality assurance during the operation phase of end‐to‐end connections. We put our contribution in the context of a vision of global‐goal‐aware self‐adaptation in computer networks and outline further research areas that require a similar classification to the work provided here. Copyright © 2012 John Wiley & Sons, Ltd.

Federated trouble ticket system for service management support in loosely coupled multi‐domain environments

“…Authors define low-level inter-domain signalling protocols assuming that the upper layers of inter-domain relations have been resolved at a strategic and business level, allowing such automatic operations. With similar assumptions, Yampolskiy et al [12] propose methods for autonomic provision of end-to-end QoS guarantees for point-to-point links in a multidomain environment. Our experience in the GÉANT-NREN environment showed that such assumptions should not be taken as granted and that in loosely coupled federations (defined in the next section) there is a considerable objection towards deployment of a system in which service provisioning request initiated in one domain is automatically configured in remote domains.…”