Compact device for monitoring ATM cells
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United States of America Patent
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Jul 20, 1993
Grant Date -
N/A
app pub date -
Jan 16, 1992
filing date -
Jan 16, 1991
priority date (Note) -
Expired
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Abstract
In a device for checking a header error in a header part of an STM signal (S) which part comprises first through P-th header blocks and an HEC (header error check) block, each header block comprising first through N-th ATM cell header units, the HEC block comprising first through N-th ATM cell HEC units, a sole error checking section (33, 35, 37) checks the header error in connection with an n-th ATM cell header unit of a p-th header block and an n-th ATM cell HEC unit when a collective control signal indicates the n-th ATM cell header unit of the p-th header block and the n-th ATM cell HEC unit, where n is variable between 1 and N, both inclusive, p being variable between 1 and P, both inclusive. A signal producing section (15) produces the collective control signal for indicating successively the first through the N-th ATM cell header units of the first through the P-th header blocks and subsequently successively the first through the N-th ATM cell HEC units. On monitoring an ATM cell of a preselected number of bytes, the ATM cell may be converted into a converted cell of the preselected number of bytes plus an empty byte at first. Subsequently, an error correcting code is calculated from the preselected number of bytes of the converted cell and is placed in the empty byte to form a full cell.
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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
- NEC CORPORATION
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Miyazono, Takashi | Tokyo, JP | 4 | 35 |
Yamashita, Hiroshi | Tokyo, JP | 461 | 5719 |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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