Message processing in two-way data devices

Details Message processing in two-way data devices Message processing in two-way data devices

1997-10-20

2000-11-28

Zimmerman, Brian

Communications: electrical

Continuously variable indicating

With meter reading

455 381, 455 382, 371 691, G08B 522

Patent

active

061541478

ABSTRACT:
In a technique for reducing duplicate messages in a two way data device, a determination (30) is made as to whether a first signature of a new message is the same as a second signature of a matching message. An error check is performed (50) on the new message when the first and second signatures are the same. A first response flag of the new message and a second response flag of the matching message are compared (40) when the first and second signatures are not the same. When the first and second response flags are both enabled, the new message is stored (20). Otherwise the error check is performed (50) on the new message. Select portions of the new message and matching message are stored (70, 80, 100, 110) in place of the matching message, depending on the comparison of the first and second response flags and the error check.

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patent: 5173688 (1992-12-01), DeLuca et al.
patent: 5384565 (1995-01-01), Cannon
patent: 5436620 (1995-07-01), Ide

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