Abstract
Protocols responsible for Quality of Service QoS routing are characterized by limited scalability, considerable complexity and traffic overhead. QoS routing should implies resource reservation to support the application requirements. The implementation of QoS routing and resource reservation require signaling mechanisms. Performing QoS routing and resource reservation at different network layers will cause redundant signaling. In this paper we propose a simple extension to the Reservation Protocol RSVP signaling mechanism that supports the simultaneous implementation of QoS probing routing and resource reservation. The extended RSVP uses only the IP protocol and eliminates the need of additional signaling mechanism in the network layer. The original RSVP is not capable to use multi paths provided by multi-path routing at network layer. In our proposed approach, multi paths are used to route the traffic if QoS requirements can not be satisfied using a single path. We formalize and verify the signaling mechanism using color Petri net. A network simulator is constructed using the same tool to measure the performance of the proposed extended RSVP.