Routing method for a hierarchical communications network, and a

Details Routing method for a hierarchical communications network, and a Routing method for a hierarchical communications network, and a

1994-08-15

1996-03-05

Kizou, Hassan

Multiplex communications

Wide area network

Packet switching

370 60, 370 943, 3701101, H04L 1246

Patent

active

054973686

ABSTRACT:
A method and apparatus for selecting routes in a hierarchical communications network wherein a number of mutually isolated areas are provided at a first level, which areas are mutually linked at a second level. In the network, routing devices are provided at both levels. For selecting a route from a first area to a second area, use is made of routing information stored in the routing devices of the first level, relating to the first level and to reaching the nearest routing device of the second level. Use is also made, in the routing devices of the first level, of routing information relating to the second level.

REFERENCES:
patent: 4887259 (1989-12-01), Morita
patent: 5323394 (1994-06-01), Perlman
patent: 5353283 (1994-10-01), Tsuchiya
ISO/IEC 10589, International Organization for Standardization (ISO/IEC), Geneva, Switzerland, First Edition, Apr. 30, 1992; pp. 1-150.
R. Perlman; "A Comparison Between Two Routing Protocols: OSPF and IS-IS"; Sep. 1991; pp. 18-24; IEEE Network Magazine.
A. Tanenbaum; Computer Networks; second edition; 1989; pp. 288-308; Prentice-Hall International; Amsterdam; The Netherlands.
V. Saksena; "Topological Analysis of Packet Networks"; Oct. 1989; IEEE Journal on Selected Areas in Communications; pp. 1243-1252.
K. Lee; "Distributed Routing Using Topology Database In Large Computer Networks"; 1988; pp. 0593-0602; IEEE INFOCOM '88; New Orleans, Louisiana.

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