Patent ID: 7389353
Filing Date: 2008-06-17
Classification: H04L

Abstract:
1. A method for sending duplicated frames in a mirrored data communication network system comprising at least one sender node and at least one receiver node and at least two data communication networks between a sender node and a receiver node, wherein the method comprises the steps of: creating and maintaining at least one data structure comprising one or more entries, an entry comprising at least a current receiver data frame sequence number, wherein a single current receiver data frame sequence number is maintained for each receiver node, and a current sender data frame sequence number is maintained for each sender node; finding out the current receiver data frame sequence number based on the receiver address information; marking the data frame to be sent to the receiver node via the data communication networks with the current receiver data frame sequence number; duplicating the data frame; sending the data frame to the receiver node via at least two data communication networks; and at least one of updating the receiver data frame sequence number within the entry and putting the receiver node into a starting phase to resynchronize the receiver node with the sender node if the receiver node has become unsynchronized with the sender node.