Error detection/correction and fault detection/recovery – Pulse or data error handling – Digital data error correction
Reexamination Certificate
2007-11-20
2007-11-20
Kerveros, James C. (Department: 2117)
Error detection/correction and fault detection/recovery
Pulse or data error handling
Digital data error correction
Reexamination Certificate
active
11326822
ABSTRACT:
In one aspect, the ESL system automatically detects ESL communication errors which result in incorrect data in the ESL's registers, and then automatically takes corrective action to update the ESL's memory with the correct data. In one aspect, the host computer transmits a register update message to an ESL. If a negative acknowledgment message or no response is received, then the host computer resends the register update message, or takes other appropriate corrective action. If the host computer receives a positive acknowledgement message, the host computer then automatically transmits one or more messages to the ESL to verify the contents of the ESL's registers to ensure that a positive acknowledgement was actually transmitted.
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Harkins Cheryl Kay
Haulk Kevin Winton
Kerveros James C.
NCR Corporation
Priest & Goldstein PLLC
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