BER Performance of MultiWavelength Optical Cross-connect Networks with Deflection Routing

The transmission performance of regular two-connected multihop transparent optical networks in uniform traffic under hotpotato, single-buffer deflection routing schemes is presented. Manhattan Street Network (MS) and ShuffleNet (SN) are compared in terms of bit error rate (BER) and packet error rate (PER) both analytically and by simulation. The authors implement a novel strategy of analysis, in which the transmission performance evaluation is linked to the traffic randomness of the networks. Amplifier spontaneous emission (ASE) noise, and device-induced crosstalk severely limit the characteristics of the network, such as propagation distance, sustainable traffic and bit rate. The results indicate that under the same load the BER performance of single-buffer deflection routing is worse than hot-potato. However, at BER = 10^-9, single-buffer has a higher throughput than hot-potato. It is shown that the feasibility of deflection routing in transparent networks with MS and SN topologies heavily depends on the power coupling coefficient of the routing space switch used in each node.