P.S.  Prakash, 
    Optimized Multi Constrained Path Computation for QoS Routing,
    Asian Journal of Information Technology,
    Volume 15,Issue 19,
    2016,
    Pages 3810-3819,
    ISSN 1682-3915,
    ajit.2016.3810.3819,
    (https://makhillpublications.co/view-article.php?doi=ajit.2016.3810.3819)
    Abstract: The goal of Quality of Service (QoS) routing algorithms is to find a feasible path satisfying a given set of constraints on parameters like delay, jitter and reliability and so on and one of the key issues in providing end-to-end QoS guarantees in packet networks is determining feasible path that satisfies a number of QoS constraints. We present our algorithm Optimized Multi-Constrained Routing (OMCR) for the computation of constrained paths for QoS routing in packet switched networks. OMCR applies distance vector to construct a shortest path for each destination with reference to a given optimization metric from which a set of feasible paths are derived at each node. OMCR is able to find feasible paths as well as optimize the utilization of network resources. OMCR operates with the hop-by-hop, connectionless routing model in Internet Protocol and does not create any loops while finding the feasible paths.
    Keywords: QoS routing;optimization;multiple constraints;feasible path;OMCR