Multiplex communications – Channel assignment techniques – Polling
Reexamination Certificate
2007-06-26
2007-06-26
Ho, Duc (Department: 2616)
Multiplex communications
Channel assignment techniques
Polling
C370S282000, C370S462000
Reexamination Certificate
active
09673959
ABSTRACT:
The method serves for calling a substation (USm) by a central station (Z) in a transmission system for the purposes of information transmission by way of a communication channel (m) called from a plurality of communication channels. The plurality of communication channels is subdivided into communication groups (GRI, GRII, GRIII) of the same property or the same parameter values. Within a selected communication group (GRII) a communication channel (m) is called, which is still communication-free. If all (n) communication channels of the communication group (GRII) are already busy, the central station (Z) goes into a waiting condition until at least one of the communication channels of the communication group (GRII) becomes communication-free. The method permits optimum, parallel and synchronous utilisation of all available communication means for a group of the substations so that the central station (Z) by way of communication channels of that group acquires simultaneously and in optimum fashion data, in particular measurement data of electricity meters, of all associated substations.
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“Application of Data Acquisition and Power Control to Regional and Central Control Systems”, by D.J. Modell, Advances in Instrumentation and Control, vol. 48, Part 02, 1993.
Hess Peter
Moos Erich
Ho Duc
Landis+GRY AG
Maginot Moore & Beck
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