Simplified recovery of damaged frames in a communication link

Error detection/correction and fault detection/recovery – Pulse or data error handling – Digital data error correction

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3952001, 39520013, 395825, G08C 2502

Patent

active

059387866

ABSTRACT:
An apparatus and method is provided for asynchronously transmitting data across fiber optical cables in a serial manner. Frames are provided as a mechanism to transmit associated data over a serial link and to tie the data being transmitted to a particular buffer set. Each outstanding request for each buffer set is individually timed to detect lost frames, and each buffer set maintains a state that keeps track of the progress and sequence of received frames. When transmission errors occur in the frames, the errors may affect only the information field in which case there is enough information in the header to identify the frame. If a frame is damaged, any outstanding operations for the affected buffer set are cleared, and any commands are brought to a logical ending point. The computer system which originates the frames is then notified of the specific nature of the error, and which information is supplied to help the originating computer system efficiently conclude the recovery procedure.

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Serial No. 08/286,028 filed Aug. 4, 1994--Docket PO994031 entitled "Shortened Timeout Period During Frame Retry In A Communication Link" by T. A. Gregg et al.
Serial No. 08/286,030 filed Aug. 4, 1994--Docket PO994030 entitled "Recovery Of Lost Frames In A Communication Link" by Gregg et al.

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