A BROAD-BAND RING NETWORK - MULTICHANNEL OPTICAL SLOTTED RING

This paper presents a multichannel optical ring network for broadband integrated services. The network uses a multichannel architecture with wavelength division multiplexing (WDM) and photonic packet switching devices for its access mechanism. The electronic speed bottleneck is r emoved out of the ring, which allows utilization of the full bandwidth for the optical fiber transmission medium. For compatibility with B-I SDN, the network uses a similar cell structure to that of an ATM based cell with a slotted ring concept. Fiber optic delay line matched filt ers are used as a means of address detection at the destination nodes. The network architecture is described and a design of the optical swi tching node is presented. A novel technique is devised in order to mea sure the average transfer delay of a cell in the multichannel slotted ring network. The analytical results show an excellent agreement with simulation results over a broad range of parameters. The results show that the major part of the cell transfer delay is coming from the prop agation delay from a source to a destination. It is also observed that the throughput characteristic of the network depends upon the aggrega ted transmission capacity of the network.