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

1994-05-12

1998-08-18

Ton, Dang

Multiplex communications

Wide area network

Packet switching

370 941, 455 121, H04L 1256

Patent

active

057967156

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: 5377182 (1994-12-01), Monacos
patent: 5386953 (1995-02-01), Stuart
patent: 5408237 (1995-04-01), Patterson et al.
patent: 5527001 (1996-06-01), Stuart

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