RSVP signaling aware QoS distributed routing

Protocols responsible for quality of service (QoS) routing are characterized by limited scalability and considerable complexity and traffic overhead. QoS routing implies resource reservation to support the application requirements. The QoS routing and resource reservation require the implementation of a signaling mechanism. 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. 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.