Performance Assessment of Enhanced Just-in-Time Protocol in OBS Networks Taking into Account Control Packet Processing and Optical Switch Configuration Times

Enhanced just-in-time (E-JIT) is a new one-way resource reservation protocol for optical burst switching (OBS) networks. This paper investigates the effect of control packet (setup message) processing time and optical switch configuration time on the performance of OBS mesh networks for EJIT protocol. A performance assessment of E-JIT is presented in comparison with just-in-time (JIT) protocol for the following mesh optical burst switching networks: degree-three and degree- four chordal rings, Mesh-torus, NSFNET, ARPANET, and the European Optical Network (EON). Among those topologies, for topologies with nodal degree around three D3T(1,19,7) leads to the best performance, while the worst performance is observed for ARPANET. For network topologies with nodal degree around four, D4T(1,19,3,9) leads to the best performance and the worst is presented by EON. It was shown that the network performance is almost independent of the optical switch configuration time for values smaller than 0.1ms. It was shown that the burst loss probability increases with the increase of the control packet processing time and it was observed that E-JIT may lead to a better performance than JIT.