Method and apparatus for an automatic decomposition of a network

Details Method and apparatus for an automatic decomposition of a network Method and apparatus for an automatic decomposition of a network

1994-06-20

1996-02-27

Safourek, Benedict V.

Multiplex communications

Wide area network

Packet switching

370 943, H04L 1256, H04L 1244

Patent

active

054954797

ABSTRACT:
The object of the invention is to perform an automatic decomposition of a packet switching network in backbone nodes and subareas nodes to speed up the routing path search without degrading the optimization criterion of the routing algorithm and without generating additional control messages on the network.
Currently, routing algorithms compute all the available paths in the network, from the source node to the destination node before to select an optimal route. However, networks are rarely fully meshed. They are usually built around a hierarchical structure: a set of nodes, interconnected by high throughput lines, are used to build a backbone with a high degree of meshing and then, local nodes are grouped in geographical subareas themselves attached to the backbone. Routing algorithms can take advantage of this particular network topology to drastically reduce the complexity of paths computation. For a given connection, only a limited number of nodes are defined as usable and are taken in account by the algorithm in its path calculation.

REFERENCES:
patent: 5224100 (1993-06-01), Lee et al.
patent: 5351237 (1994-09-01), Shinohara et al.
patent: 5353283 (1994-10-01), Tsuchiya
Computer Networks, vol. 1, 1977, pp. 155-174 "Hierarchical Routing for . . . ".
IEEE Trans. on Computers, vol. 38, No. 8, Aug. 1989, pp. 1059-1074 `An Adaptive Hierarchical Routing Protocol`.
IEEE Journal on Selected Areas in Communication, vol. 7, No. 8, Oct. 1989, pp. 1243-1252 "Topological Analysis of Packet Network".

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