Method and an apparatus for modifying a FCS

Details Method and an apparatus for modifying a FCS Method and an apparatus for modifying a FCS

1996-03-22

1997-12-02

Chung, Phung

Excavating

371 371, G06F 1110, H03M 1300

Patent

active

056944071

ABSTRACT:
In intermediate network nodes of high speed packet switching networks, when a message is modified, the invention proposes a method and an apparatus for calculating a modified FCS error code. Using the properties of calculations in the Galois Field, the implementation of the invention, specially in the intermediate Frame Relay network nodes, is reduced to a plurality of simple well known operators (90, 100, 120, 30); the implementation of the invention allows the usage of a plurality of small lookup tables (60, 70, 80, 110) as desired and thus avoiding large amounts of storage resources.

REFERENCES:
patent: 4473902 (1984-09-01), Chen
patent: 5131012 (1992-07-01), Dravida
patent: 5539756 (1996-07-01), Glaise et al.
patent: 5619516 (1997-04-01), Li et al.
IBM Journal of Res. & Dev., vol. 33, No. 6, Nov. 1989 pp. 618-626.
IEEE Trans. on Comm. vol. 40, No. 6, 6092, pp. 989-991.

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