Alcatel Lucent

Daniel Lafleur

Alp Dibirdi

Vinod Prabhu

James Wisener

André Poulin

Various embodiments relate to a system and related method of measuring at least one transport link's performance in a communications network. An originating device controlled by a customer may generate testing frames that are transported to a receiving device also controlled by the customer through the at least one transport link that connects the two devices. In some embodiments, the transport links may transfer the testing frames while the transport links are transporting other data traffic. The receiving device may parse incoming frames and, upon identifying the testing frames, may generate echoing response frames. In some embodiments, the echoing response frames may be placed in one of a series of priority-based service queues. The originating device may then receive the response frames through the transport links and may measure the stream of incoming frames to measure and analyze the transport links' performance.

In-service throughput testing in distributed router/switch architectures

Embodiments of the invention employ specially adapted P2MP and MP2P transmission techniques to communicate traffic of a TDM based SCADA system over an IP/MPLS based network. Advantageously, by specially adapting P2MP and MP2P transmission techniques to carry TDM based SCADA traffic over an IP/MPLS network, an existing TDM based SCADA system can be migrated to an IP/MPLS network and operated in an easy to manage and bandwidth efficient manner as compared to a solution that employs point-to-point connections between a SCADA master node and subsystems over an IP/MPLS network. Furthermore, since TDM based SCADA equipment would not need to be replaced with IP based SCADA equipment in such a migration, significant equipment and installation costs associated with such replacement can be avoided.

Circuit emulation service for carrying time division multiplexed SCADA traffic

Apparatus and methods of recovering synchronization for multiple-link communications are disclosed. Streams of communication traffic on a plurality of communication links from which communication traffic is to be extracted and combined into a single communication traffic stream are monitored for receipt of synchronization information for each link. In the event that an error occurs in receipt of the synchronization information for any of the communication links, a stream received on each affected link is modified. For example, traffic may be removed from or inserted into a received stream where synchronization information for a link is received twice or received earlier than expected, respectively. If synchronization information for a link is missing, then it may be generated and inserted into the stream received on that link. In some embodiments, synchronization information includes sequence numbers, and inter-link synchronization is re-aligned to received sequence numbers when expected and received sequence numbers do not match.

Growing community of inventors

Kanata, Canada

Daniel Lafleur