Multiplex communications – Pathfinding or routing – Combined circuit switching and packet switching
Reexamination Certificate
2011-07-12
2011-07-12
Shah, Chirag G (Department: 2477)
Multiplex communications
Pathfinding or routing
Combined circuit switching and packet switching
C370S401000
Reexamination Certificate
active
07978687
ABSTRACT:
A method of controlling routing in a packet network supported by a transport network allowing the dynamic creation/suppression of links for transporting packets of said packet network, said method including a routing step, a step of informing other routers of said network of the metric assigned to each link of the packet network, and a step of creating/destroying a link. The link may have three states: a non-connected state if said two routers cannot be directly connected, a virtual connection state wherein a virtual metric is assigned to said link between said head end router and said tail end router of the same communication, and a real connection state wherein a real metric is normally assigned to said link.
REFERENCES:
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patent: 6275470 (2001-08-01), Ricciulli
patent: WO 03/019870 (2003-03-01), None
patent: WO 2004/034653 (2004-04-01), None
Guerin et al., “QoS routing mechanisms and OSPF extensions”, Global Telecommunications Conference, 1997. Globecom '97, vol. 3, Nov. 3-8, 1997.
Lee, “Topology Aggregation for Hierarchical Routing in ATM Networks” Computer Communication Review, Association for Computing Machinery, vol. 25, No. 2, pp. 82-92, Apr. 1, 1995.
Calvignac Géraldine
Le Roux Jean-Louis
Cohen Pontani Lieberman & Pavane LLP
France Telecom
Nguyen Minh-Trang
Shah Chirag G
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