Method and an apparatus for modifying a FCS
US5694407A · kind A · utility
18Cited by
4References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 22, 1996 |
| Grant date | Dec 2, 1997 |
| Priority date | — |
| Expiry date | Mar 22, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/5647
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.