Limiting number of retransmission attempts for data transfer...

Details Limiting number of retransmission attempts for data transfer... Limiting number of retransmission attempts for data transfer...

2007-07-10

2007-07-10

Lamarre, Guy J. (Department: 2133)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

C370S349000

Reexamination Certificate

active

10733668

ABSTRACT:
An RNIC implementation that performs direct data placement to memory where all segments of a particular connection are aligned, or moves data through reassembly buffers where all segments of a particular connection are non-aligned. The type of connection that cuts-through without accessing the reassembly buffers is referred to as a “Fast” connection because it is highly likely to be aligned, while the other type is referred to as a “Slow” connection. When a consumer establishes a connection, it specifies a connection type. The connection type can change from Fast to Slow and back. The invention reduces memory bandwidth, latency, error recovery using TCP retransmit and provides for a “graceful recovery” from an empty receive queue. The implementation also may conduct CRC validation for a majority of inbound DDP segments in the Fast connection before sending a TCP acknowledgement (Ack) confirming segment reception.

REFERENCES:
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patent: 6233251 (2001-05-01), Kurobe et al.
patent: 6909718 (2005-06-01), Aramaki et al.
patent: 7069490 (2006-06-01), Niu et al.

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