Distributed fault localization for multi-domain all-optical networks with partial power monitoring

In this paper, we propose a fault localization protocol for localizing single-link failures in multi-domain all-optical networks. This protocol is based on a limited-perimeter vector matching (LVM) mechanism, which restricts fault localization in a smaller perimeter area and can thus significantly reduce the time and space complexities of fault localization. By assuming power monitoring available only at edge nodes, this protocol can localize both inter-domain and intra-domain link failures without exchanging any internal confidential domain-specific information (e.g., topology and traffic information) between different domains. We show through analytical results that it can not only fast localize an inter-domain link failure between different domains but also localize an intra-domain link failure that affects inter-domain traffic faster than the open-shortest-path-first (OSPF) protocol in a large network.