A metro WDM multi-ring network with variable packet size

This paper proposes two metro Wavelength Division Multiplexing (WDM) ring network architectures for variable size packet traffic. Firstly, it presents the network architectures and describes their medium access control (MAC) protocol. Secondly, it evaluates and compares the performance of the modified and original architectures, presenting results for throughput, queuing delay, packet dropping probability and global delay. Finally, it analyses and explains the results.