The method of WDM network reserving based on the p–cycle

There are several schemes to ensure the reliability of WDM networks, such as hardware redundancy and network redundancy. The problem of choosing a rational option for network redundancy for WDM networks is no less relevant than for SDH networks. The WDM network, like the SDH network, can be represented as a set of typical structures: linear (single-connected structure), ring (two-connected) and cellular (multi-connected). For redundancy of optical networks based on cellular topology, a redundancy mechanism based on p-cycles is proposed. Currently, the concept of p-cycles is increasingly being used on European transport communication networks.