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US 6,487,215 B1Granted
ATM communications system and ATM testing method
AssigneeOki Electric Industry Co., Ltd.
InventorsKazuhiro Watanabe, Satoshi Owada
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AssigneeOki Electric Industry Co., Ltd.
InventorsKazuhiro Watanabe, Satoshi Owada
Estimating the term…
An ATM signal generator generates packet signals by linking N data blocks that includes user data and a specifier byte containing a sequence number bit. A transmitter receives the packet signals, generates control signals containing length information, generates N−1 ATM cells accommodating one data block in the payload, generates one ATM cell accommodating one data block and a control signal in the payload, and transmits all of the ATM cells to a communications path. A receiver receives ATM cells from the communications path, detects the number of cell rejections using the sequence number bits extracted from the specifier bytes in all of the ATM cells, and detects the number of bit error occurrences using the length information extracted from the control signals. Sequence number bits are accommodated in all of the ATM cells, and length information is accommodated in the N'th ATM cell, wherefore bit errors and cell rejections can be detected from end to end and the number of cell rejections can be detected even when data containing control signals have been lost on the communications path.
A method for simultaneously testing a transmitter that generates ATM cells and a communication path that communicates the ATM cells from the transmitter to a receiver, the method comprising:
An ATM testing system for simultaneously testing a transmitter that generates ATM cells and a communication path that communicates the ATM cells from the transmitter to a receiver, the method comprising:
Dependencies are inferred from the claim text.