Checksum calculation unit and method for error detection on data

Details Checksum calculation unit and method for error detection on data Checksum calculation unit and method for error detection on data

1993-06-14

1996-03-19

Beausoliel, Jr., Robert W.

Excavating

371 48, G06F 1110

Patent

active

055008640

ABSTRACT:
A high performance transport layer checksum calculation unit and method is described for use in computer data communications systems which provides simultaneous general purpose data movement and checksum calculations. Data must be copied from the main memory of a computer in order to be transmitted and often a checksum must be calculated on the data for error detection purposes. The invention involves performing both of these tasks simultaneously thus requiring only one scan of the data memory. The checksum calculation method improves throughput capacity via a unique hardware architecture supporting delayed checksumming of packet segments. A net improvement for packets larger than a certain size is achieved via partial addition during DMA controlled memory access allowing improved average cycle time per data packet segment.

REFERENCES:
patent: 2907526 (1959-10-01), Havens
patent: 3299260 (1967-01-01), Cohen
patent: 3573726 (1971-04-01), Towell
patent: 4054788 (1977-10-01), Maitland et al.
patent: 4092732 (1978-05-01), Ouchi
patent: 4355390 (1982-10-01), Hellwig et al.
patent: 4390989 (1983-06-01), Pehrson
patent: 4523314 (1985-06-01), Burns et al.
patent: 4555784 (1985-11-01), Wood
patent: 4570215 (1986-02-01), Miura et al.
patent: 4604750 (1986-08-01), Manton et al.
patent: 4646307 (1987-02-01), Nishimura
patent: 4672614 (1987-06-01), Yoshida
patent: 4889233 (1989-11-01), Ishizuka et al.
patent: 4899305 (1990-02-01), Needles
patent: 4901270 (1990-02-01), Galbi et al.
patent: 4901318 (1990-02-01), Tomisawa
patent: 4949342 (1990-08-01), Shimbo et al.
patent: 4964126 (1990-10-01), Musicus et al.
patent: 5058110 (1991-10-01), Beach et al.
patent: 5065353 (1991-11-01), Nojiri et al.
Patent Abstracts of Japan, Japanese Patent Application JP870048944, Mitsubishi Electric Corp.
ISO 8073-1986 (E)--Connection Oriented Transport Protocol Specification.
An Arithmetic Checksum for Serial Transmissions, J. G. Fletcher, from IEEE Transactions on Communications, vol. COM-30, No. 1, Jan. 1982.
An Analysis of TCP Processing Overhead, David D. Clark, et al, CH2613-8/88/0000/0284/S01.00 1988 IEEE.

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