| 摘要 |
The present invention is concerned with a use of the Parallel Redundancy Protocol PRP (IEC 62439-3) for traffic duplication and redundant transport of the duplicated traffic in a single packet-switched wide-area communication network including a plurality of nodes (1-5) interconnected via inter-node links (a-g) in a meshed topology. It involves the step of identifying, between a send (1) and receive node (3), two distinct communication paths (A,B) with no link or node in common except for the send and receive node, as well as the step of configuring the send (1) and receive nodes (3) to operate according to the Parallel Redundancy Protocol PRP. At any time during regular operation, and for any critical message to be transmitted from the send (1) to the receive node (3), two redundant packets are then generated, and each of the redundant packets is being sent via one of the two communication paths, resulting in an increased availability of the communication network without incurring the cost of full network duplication. |
