Reducing Network Cost of Many-to-Many Communication in Unidirectional WDM Rings With Network Coding

In this paper, the authors address the problem of traffic grooming in WDM rings with all-to-all and its generalization to many-to-many service by using network coding. They consider minimizing the number of Line Terminating Equipment (LTE) on two types of unidirectional rings, namely, single-hub and un-hubbed rings, as their objective. In single-hub rings, they investigate the minimum cost provisioning of uniform all-to-all traffic in two cases: where network coding is used to linearly combine data, and where it is not used and data is transmitted without coding. They generalize the service mode to many-to-many and evaluate the cost of provisioning.