Siemens Aktiengesellschaft

Siemens Aktiengesell Schaft

Ermin Sakic

Andreas Zirkler

Vivek Kulkarni

A control unit and method for operating an industrial automation system communication network that includes a plurality of communication devices, wherein a plurality of control units redundant with respect to each other controls functions of a plurality of associated communication devices, where the communication devices transmit communication-specific input variables to all associated redundant control units, output variables (produced by the control units redundant with respect to each other are checked for deviations from each other, and where if there are deviations, then a switchover is made to reserve control units or control units having output variables that deviate with respect to a majority of control units redundant to each other are deactivated.

Control unit and method for operating an industrial automation system communication network comprising a plurality of communication devices

Method for operating a communication network that includes a communication devices and form part of an industrial automation system, wherein control units control functions of associated communication devices, where a prescribable proportion of system resources of an associated communication device is provide for a prescribable resource use duration for each control unit, when prescribable synchronization events occur, the control units synchronously detect state variables of the communication devices and adjust them to one another, the control units additionally determine, for at least one past resource use duration, how a determination time available for a path determination influences quality criterion changes for communication network paths to be determined, and determine a first correction value synchronization events based on the quality criterion changes, and the control units determine a second correction value for the synchronization events if inconsistent state variables are determined when the state variables are adjusted to one another.

Method for operating an industrial automation system communication network comprising a plurality of communication devices, and control unit

Computer system and method for dynamically adapting a software-defined network A computer system for dynamically adapting a software-defined network is suggested. The computer system comprises a plurality of virtual domains, each virtual domain comprising a network controller to which a back-up network controller is assigned, wherein the network controller is adapted to manage a plurality of switches being assigned to the virtual domain, wherein the software-defined network is partitioned into the plurality of virtual domains, and a root controller, wherein the root controller is adapted to manage the software-defined network by dynamically adding and/or removing virtual domains based on a threshold of the software-defined network, wherein a back-up root controller is assigned to the root controller. Further, a method for dynamically adapting a software-defined network is suggested. The suggested computer system provides the advantage of a dynamical adaptation of the software-defined network and at the same time, due to the back-up controllers, an improved fault-tolerance.

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Munich, Germany

Ermin Sakic