Analytical model for an IP over WDM ring network

A carrier preemption access control protocol based on carrier sense multiple access schemes is investigated for supporting IP packets over all optical WDM ring networks. The intention of our protocol design is to reduce the communication overhead of IP packets over optical networks for local/metropolitan areas. To facilitate spatial reuse on the bandwidth of all optical ring networks, a special design is made for the carrier preemption scheme. We develop an analytical model to approximate the average transfer delay for our protocol. We validate our model via simulation and show an excellent agreement with simulation results over a broad range of parameters. The results show that the proposed protocol can achieve higher bandwidth efficiency and lower access delay.