Chi K Chan

US Patent:

7590756, Sep 15, 2009

Filed:

May 13, 2005

Appl. No.:

11/128355

Inventors:

Chi Chiu Chan - Wayne NJ, US

Assignee:

ITT Manufacturing Enterprises, Inc. - Wilmington DE

International Classification:

G06F 15/173

US Classification:

709238, 709239, 709240, 370225, 370228, 370231, 370235, 370237, 370390, 370389, 370392

Abstract:

A communication node of the present invention automatically transmits original and duplicate packets over different paths in a communications network to improve delivery reliability of the packet and to decrease packet delivery time. A packet is typically marked for reliable transmission by the application layer of a source node, while a routing agent module within the node IP layer processes the marked packets. The marked packets are transmitted over redundant (e. g. , primary and secondary) network paths from the source node to the destination node. The primary path is usually the shortest path between the source and destination nodes, while the secondary path is selected to avoid overlap with the primary path. The application or transport layer of the destination node filters or removes plural copies of received packets.

US Patent:

7787450, Aug 31, 2010

Filed:

Oct 11, 2006

Appl. No.:

11/545587

Inventors:

Chi Chiu Chan - Wayne NJ, US
Amit Patel - Edison NJ, US

Assignee:

ITT Manufacturing Enterprises, Inc - Wilmington DE

International Classification:

H04L 12/28

US Classification:

370389, 370236, 370238

Abstract:

An efficient network formation technique for mobile ad-hoc wireless networks according to the present invention overcomes bandwidth overhead due to generation of database update or Link State Advertisement (LSA) messages in response to changes in certain parameters (e. g. , node group size, etc. ) with respect to both single and plural node group scenarios. The present invention controls flooding of LSA messages triggered by changes in these parameters (e. g. , node group size), thereby reducing overhead traffic during network start-up. This is achieved without impact on message delivery capability and group merge operations. After network start-up is complete and the network is formed, the present invention continues to reduce LSA flooding in a mobile scenario when radios or nodes move into and out of range with one another.