Robert Boschgmbh

Uwe Zurmuehl

Detlef Rode

Herbert Lohner

Hans-Joerg Mathony

Karl-Heinz Kaiser

Jan Unruh

Udo Brunke

Juergen Glasser

Olaf Linne

Hans-Lothar Pasch

A method for monitoring a data transmission between at least two network users, in particular according to the ISO 15765-2 transmission protocol, is described, at least one sender transmitting data to at least one receiver in the form of data telegrams, a data transmission taking place via at least one data telegram and the receiver transmitting at least one flow control telegram to the sender when the data of a data transmission is transmitted in a segmented manner in a first data telegram and at least one subsequent data telegram, an additional flow control telegram being transmitted from the receiver to the sender after the last data telegram of a data transmission.

Method and device for monitoring a data transmission

A method to coordinate network components is proposed. At least one first logical component and at least one second logical component are provided. Each of the components corresponds to a specific application and communicate with each other via a network on a communication plane that is substantially independent from an application plane. According to the method, a communications connection is established between the at least one first logical component and the at least one second logical component at the initiative of one of the at least one first logical component and the at least one second logical component, functioning in response to a specific event that concerns at least one of the at least one first logical component and the at least one second logical component. Moreover, an information message is transmitted via the established communications connection from the at least one second logical component to the at least one first logical component, the information message including at least information with respect to a current application status of the at least one second logical component. In addition, the information of the transmitted information message in the at least one first logical component is compared with corresponding information stored in a nonvolatile memory.

Method for coordinating network components

A method for supervising the connections of a transmission system, the method establishing a logical connection between two components, such that one component in each case assumes the functions of a main component. The components for carrying out the method must have devices which allow hierarchical operation of the transmission system.

Process and components for controlling the connections of a transmission system

An addressing apparatus and a corresponding method are described, such that addressing of network components, which are connected via a bus and which each have an address including a permanent base address and an offset address linked thereto, is accomplished with a device for transmitting the address via the bus. A coding device, insertable between the bus and a relevant network component, for defining the corresponding offset address using one or more predetermined coding signals generated thereby, is additionally provided. It is possible thereby to achieve a simple manner of addressing components (which preferably have identical functions and identical base addresses) that requires no manual action by the user on the components.

Addressing apparatus and method

An improved method for exchange of data in data processing installations, especially Controller Areas Networks (CAN), permits acknowledged and segmented transmission of data strings, of arbitrarily long length, between at least two stations in the network or other data processing installation. The method includes the transmission of the messages associated with the data by means of frames; the frames contain a header field and a data field. In the event of contention between multiple stations of the data processing installation for access to the bus connection, which frame has priority is determined by evaluating the respective header fields. In the data field of the frame, there is a control information field (58, 95) containing a message code which serves to identify the message type. The message codes distinguish among activation messages (AR, AC), data messages (DT), and acknowledgement (AK) messages. This permits transmission of data strings, of limited length, with acknowledgement. Further, the control information fields (58, 95) of certain messages contain a sequence number, a receiver status code, a message end code, and a code specifying how many data bytes are being transmitted in the frame. With this additional information, data strings of arbitrarily long length may be transmitted as segments. The receipt of the individual partial messages is confirmed by sending back an acknowledgment in each case.

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Giesen, Germany

Uwe Zurmuehl