Siemens Aktiengesellschaft

Siemens Aktiengsellschaft

Feng Chen

Jürgen Schmitt

Franz-Josef Götz

An Ninh Nguyen

Marcel Kiessling

Marcel Kießling

Method for data transmission within an industrial communication network, wherein selected datagrams are transmitted within predetermined time intervals, which are synchronized at all network nodes, where a number of network nodes from the respective source network node to the respective target network node is determined for forwarding the selected datagrams in each case, and where the selected datagrams are transmitted during first periodic time intervals having a first protection interval length in the event of a determined number of network nodes corresponding to at least one predefined threshold value and, in contrast thereto, if a determined number lies below the threshold value, then the selected datagrams are transmitted during second periodic time intervals having a second protection interval length, which is shorter than the first protection interval length.

Communication device and method for data transmission within an industrial communication network

A network node, computer program, computer-readable medium and method for fail-safe data transmission in a network, in which data packets are transmitted from a sender to a receiver via redundant paths, upon which resources for the transmission are reserved at participating network nodes utilizing an identifier associated with the relevant path, wherein, if a new path is to be found for at least one of the paths involved, then the previous reservations on all redundant paths are maintained, a new redundant path is determined for the at least one path involved and an attempt is made to reserve resources for the transmission on this new redundant path at the participating network nodes, wherein a new identifier associated with the new path is utilized, and if the new reservations on the at least one new path are successful, then previous reservations on the at least one previous path involved are removed.

Network node, computer program, computer-readable medium and method for fail-safe data transmission

The present disclosure concerns a method of synchronization of data packet transmission (P, P, P) in a network (N), including and/or initiating the acts of: Receiving (S), e.g. from a terminal device (T, T, T) of the network (N), one or more data packets (P, P, P) after a threshold time interval (tt) of a periodic transmission window (RT, BE), wherein the threshold time interval (tt) is arranged at the beginning of said periodic transmission window (RT, BE), and Forwarding (S) the data packet (P, P, P) in a subsequent transmission window (RT, BE), preferably directly after the transmission window in which the data packet (P, P, P) was received, within the threshold time interval (tt) of the transmission window (RT, BE).

Method of synchronization of data packet transmission

The invention relates to methods and to a device for the modular orientation of an AVB stream. The introduction of a new attribute (L_BRIDGE) into the reservation protocol that has been further developed for TSN allows to better use the existing mechanisms in the Ethernet Standard. To this end, each receiver and each transmitter has to announce himself in the network (already existing for the transmitters).

Method and device for the modular orientation of an AVB stream

Sensors of a control system transmit detected cyclical actual states of a technical industrial process to a common central unit via a first protected connection of a first open communication network once within a specified time window. The central unit transmits cyclical control signals commensurate with the actual states to multiple actuators via a second protected connection of a second open communication network once within the specified time window. Each sensor supplies the actual state detected by the sensor to the first open communication network within a respective transmitter-side sub-region within the time window. The central unit receives the transmitted actual states within a respective corresponding receiver-side sub-region within the time window. The transmitter-side sub-regions of the sensors are specified such that the receiver-side sub-regions are disjointed from one another.

Sum stream for actual states and control signals of a distributed control system

The invention relates to a method and to a device that describe a real-time network plan for industrial control and monitoring applications, wherein standard Ethernet switching elements are used for the communication network, in particular on the basis of the new mechanisms according to the IEEE 802.1 TSN Task Group. The sequence plan combines clocked data transfer with the stream reservation concept and thus provides determinism with guaranteed maximum latency and access controls at runtime.

Method for performant data transmission in a data network with, in part, real-time requirements and apparatus for carrying out the method

The disclosure relates to a method and device for time-controlled data transmission in a TSN. A new traffic shaping method is described for time-sensitive data streams. The objective is to offer the same real-time performance and configuration complexity as in the prior art but without the need for time synchronization throughout the entire network. The traffic shaper provides that a data frame that is received by a bridge in a first-time interval is passed by this bridge to the next hop/bridge in the next time interval. Each bridge knows the start time of the time interval that belongs to a particular data stream. Each data frame must contain a so-called 'delay value,' thus a delay value which is measured by each bridge using a local clock that measures the delay time spent by the data frame in the queue at the outgoing port.

Method and device for time-controlled data transmission in a time-sensitive network

The invention relates to a method for fast reconfiguration of GM clocks in the TSN network by means of an explicit teardown message. Carrying out a network-wide cleansing of the outdated information ensures that outdated GM information having a higher priority cannot overwrite new information. The current BMCA+ relies on the hold time mechanism in order to quickly carry out the GM reconfiguration on all nodes. The problem is solved by the introduction of a specific advertising schema for the BMCA+ protocol in order to resolve the described instability during the GM reconfiguration period. The method uses an announce+ message for an extra messaging that displays a clock having outdated information and disseminates new information in the complete network. The aim is to inform all clocks that outdated information is present such that the GM reconfiguration can be carried out quickly and without extra conflicts. This so-called 'teardown' notification is provided for the case when a current best clock (that is, either a first or second-best GM clock) lowers its priority in order to become a subordinate clock.

Method for fast reconfiguration of GM clocks in the TSN network by means of an explicit teardown message

Methods and systems are provided for improved data packet transmission in a network bridge. Separate data packets received from a plurality of automation components are aggregated into a single data packet stream. The data packet stream is transmitted to another network node, for example, another network bridge.

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Feucht, Germany

Feng Chen