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Background

QosIP (Quality of Service Internet Protocols) models have been developed by the GMU C³I center at Networking and Simulation Lab over the past two years. Currently, we are working to enable simulation of Quality of Service Routing combined with the Resource reSerVation Protocol (RSVP) to enabled detailed modeling  IETF Integrated Services.

The models we have developed include Best-Effort and Reserved Traffic Application, IGMP, RSVP and QOSPF. The RSVP protocol is a mechanism that allows adequate resources to be reserved in a network in order to guarantee the quality of some kinds of services, such as capacity (bandwidth) and latency for real-time traffic. RSVP has to depend on a routing protocol which, to be most effective, should be QOS-sensitive. Our QOS-sensitive routing (QOSPF) model is based on the well-known OSPF routing protocol and it s multicast derivative, MOSPF. This allows investigating the scalability of QOSPF-routed networks. Their performance can be examined within our Debug Model (11 routers and 12 hosts), Mid-size Model (42 routers and 48 hosts) and Large Model (86 routers and 96 hosts) of networks.

All models were developed using the OpNet simulation package with procedures defined in the C language. They were mostly designed and implemented by Lava K Lavu and Ravi Malghan. Jiemei Ma and Gang Duan did a lot of work on rectifying and improving the models. All of this work was done under the supervision of Dr. Mark Pullen.

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