Packet switching arrangement including packet retransmission

Details Packet switching arrangement including packet retransmission Packet switching arrangement including packet retransmission

1988-11-14

1990-06-05

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 60, H04L 116

Patent

active

049320203

ABSTRACT:
A packet switching arrangement in which packet retransmission is provided by the network for packets found by the network to be unusable. A packet switch node is equipped with a packet path and a control signaling path cooperating with packet address route arbitration and gating circuitry for effecting the packet retransmission. As a packet from a network input unit is passed from switch node to switch node a control signaling path through the switch nodes back to the input unit originating the packet is established. When a switch node detects an unusable packet a retransmit control signal is returned via the control signaling path to the input unit originating the packet. The input unit responds to the retransmit signal by resending the original packet. An unusable packet is blocked from further transmission in one embodiment and marked for removal at the network output ports in another embodiment. Unusable packets result from packet corruption or from packet collision within a switch node.

REFERENCES:
patent: 4670871 (1987-06-01), Vaidya
patent: 4679190 (1987-07-01), Dias et al.
B. Beranek and Newman Inc., "The Butterfly Parallel Processor", VLSI Systems Design, Mar. 1986, pp. 20, 22.
A. Huang et al., "Starlite: A Wideband Digital Switch", GLOBECOM '84, vol. 1, Nov. 26-29, 1984, pp. 121-125.

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