Non-blocking dynamic fast packet switch for satellite communicat

Details Non-blocking dynamic fast packet switch for satellite communicat Non-blocking dynamic fast packet switch for satellite communicat

1997-10-15

1999-07-27

Ton, Dang

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

370389, H04L 1256

Patent

active

059302542

ABSTRACT:
The present invention overcomes the limitations encountered by conventional packet switching using virtual circuits. The present invention utilizes a "datagram" approach that routes every packet (22) conveyed by the system independently at every node in the network. The packets (22) are directed along an optimized pathway through the network by a fast packet switch (38) that directs traffic based on instructions from an adaptive routing processor (12A) that continuously runs an adaptive routing software (12B). This adaptive routing processor (14) supplies an output (12C) to a routing cache memory (20) which stores fast packet switch routing port output tags (30). An input packet processor (28) extracts a supercell address from the header (24) of each packet (22) and uses the supercell address (21A) as an index to retrieve a fast packet switch output port tag (30) stored in the routing cache memory (20). This tag (30) is prepended to the packet (22), and sent to an input port (36) of the fast packet switch (38), which includes a number of multi-stage self-routing switch modules (132) and a number of asynchronous packet multiplexors (134). The modules (132) and multiplexors (134) route the tagged packet (34) to an output port (40) which is connected either to a scanning beam antenna (SBA) or an intersatellite link antenna (ISA).

REFERENCES:
patent: 5583863 (1996-12-01), Darr et al.
patent: 5610914 (1997-03-01), Yamada
Delli Priscoll et al., "Access and Switching Techniques in an ATM User-Oriented Satellite System," IEEE Infocom '89 Proceedings, vol. 2, CH2702-9/89/0000/0632, Apr. 1989, pp. 0632-0640.
Enrico Del Re et al., "A Fast Packet Swithcing Satellite Communication Network," IEEE Inforcom '91 Proceedings, vol. 2, CH2979-3/91/0000-1445, Apr. 1991, pp. 0445-0453.
Koji Suzuki et al.,"An ATM Switching System-Development and Evaluation," NEC Research and Development, vol. 32, No. 2, Apr. 1991, pp. 242-251.
Nachum Shacham, "Protocols for Multi-Satellite Networks," IEEE Milcom '88 Proceedings, vol. 2, CH2557-9/88/0-0001, Oct. 1988, pp. 0501-0505.

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