Patent ID: 7619993
Filing Date: 2009-11-17
Classification: H04L

Abstract:
1. A method for detecting the presence of duplicate data packets in a multi-packet message in a multinode data processing system, said method comprising the steps of: transmitting, by and from a first node to at least one receiving node, a plurality of said data packets, all of said transmitted data packets, except for one such packet, having a field therein with bits that are randomly generated, the field of said excepted data packet being preset to be a function of the randomly generated bits in the other data packets; for each data packet received at said at least one receiving node, accumulating a checksum of said fields; and providing notification to an Upper Layer Protocol, at said at least one receiving node, only when no duplication is detected after the receipt of the first k packets of a message, where k is the number of packets in a message to be transmitted, said duplication detection indicating, based on said accumulated checksum, that a duplicate packet is present.