Packet switch with broadcasting capability for ATM networks

Details Packet switch with broadcasting capability for ATM networks Packet switch with broadcasting capability for ATM networks

1991-01-30

1993-07-20

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 941, H04J 326

Patent

active

052299910

ABSTRACT:
A packet switch having broadcasting capability for an ATM network includes a copy network stage having an increased number of copy outputs over the number of switch inputs and outputs to improve data throughput under worst case conditions, broadcast translation circuits with inputs connected to a multiple number of copy network outputs for multiplexing the data packets therethrough, partitioned memories for the broadcast translation circuits to reduce their memory requirements, and techniques for aligning broadcast copies of data packets for minimizing the number of copies each BTC must translate and thereby reduce each of their memories. All of these enhancements to a prior art broadcast ATM switch substantially reduce its memory requirements to thereby enable broadcasting in an ATM switch to be practically realized.

REFERENCES:
patent: 4516238 (1985-05-01), Huang et al.
patent: 4596010 (1986-06-01), Beckner
patent: 4849968 (1989-07-01), Turner
patent: 4969146 (1990-11-01), Twitty
patent: 4991168 (1991-02-01), Richards
patent: 5007070 (1991-04-01), Chao
patent: 5050164 (1991-09-01), Chao
Article entitled "Nonblocking Copy Networks for Multicast Packet Switching" by Lee published in the IEEE Journal on Selected Areas in Communications, vol. 6, No. 9, Dec. 1988.
Article entitled "Starlite: A Wideband Digital Switch" by Huang et al. published in Proceedings of Globecom 84, Dec. 1984, 121-125.
Article entitled "Fast Packet Switch Architectures for Broadband Integrated Services Digital Networks" by Tobagi published in IEEE, 1990, 134-167.
Article entitled "Design of a Broadcast Packet Switching Network" by Turner published in IEEE Transactions on Communications, vol. 36, No. 6, Jun. 1988, 734-743.
Article entitled "Output-buffer Switch Architecture for Asynchronous Transfer Mode" by Suzuki et al. published in IEEE, 1989, 99-103.

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