Method and system for detecting dropped micro-packets

Details Method and system for detecting dropped micro-packets Method and system for detecting dropped micro-packets

2006-05-16

2006-05-16

Bonzo, Bryce P. (Department: 2113)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S043000, C714S748000

Reexamination Certificate

active

07047437

ABSTRACT:
A system and a method of providing error detection and correction of transmission of multiple flits between sending and receiving agents connected together in a network or computer interconnect environment is disclosed that comprises embedding a sequence identifier in each flit prior to transmission, sending each flit to a connected receiving agent, examining the sequence identifiers of each flit being received and requesting the sending agent to resend a flit if the sequence identifier for that flit is determined to be incorrect.In a preferred embodiment of the present invention, the sequence identifier is embedded in the control portion of the flit and comprises a sequence number that is incremented or otherwise changed in a predictable manner, so that the order of flits being received is predicted. If the sequence number for a flit is different that expected, the receiving agent requests that it be resent.

REFERENCES:
patent: 4439859 (1984-03-01), Donnan
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patent: 5790530 (1998-08-01), Moh et al.
patent: 6684363 (2004-01-01), Cassiday et al.
patent: 2001/0038634 (2001-11-01), Dally et al.
Roberts, Alan et al “A General Method for Deflection Worm Routing on Meshes based on Packet Routing Algorithms” IEEE 1997.
Makedon, Fillia et al “On Bit-Serial Routing for the Mesh and the Torus” IEEE 1990.

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