Elmos Semiconductor Ag

Rainer Kraly

Christian Schmitz

Radoslaw Watroba

The communication network for transmission of messages at different transmission rates comprises a bus line and a plurality of bus participants each of which includes a bus transceiver connected to the bus line and a control unit coupled with said bus transceiver, inter alia, for converting messages received via the bus line and for generating messages to be sent via the bus line, wherein each message includes control data and payload. The messages include first messages whose payload is transmitted via the bus line at a first rate and second messages whose payload is transmitted via the bus line at a second rate which is higher than the first rate, wherein the control data of each message contain a coding representing the transmission rate of the payload of the respective message. The bus participants include first bus participants which can exclusively process a first payload and second bus participants which can process both first and second messages, wherein the bus transceiver of each first bus participant, upon detection of the coding indicating the second payload transmission rate when receiving a second message, substitutes the payload of this second message by a substitute payload and transmits this substitute payload at the first rate to the control unit.

Communication network for transmission of messages

The communication network for transmission of messages at different transmission rates comprises a bus line () and a plurality of bus participants () each of which includes a bus transceiver () connected to the bus line () and a control unit () coupled with said bus transceiver, inter alia, for converting messages received via the bus line () and for generating messages to be sent via the bus line (), wherein each message includes control data and payload. The messages include first messages whose payload is transmitted via the bus line () at a first rate and second messages whose payload is transmitted via the bus line () at a second rate which is higher than the first rate, wherein the control data of each message contain a coding representing the transmission rate of the payload of the respective message. The bus participants () include first bus participants () which can exclusively process a first payload and second bus participants () which can process both first and second messages, wherein the bus transceiver () of each first bus participant, upon detection of the coding indicating the second payload transmission rate when receiving a second message, substitutes the payload of this second message by a substitute payload and transmits this substitute payload at the first rate to the control unit ().

A method for the switching of participants of a bus system from a first state with reduced energy consumption to a second state with increased energy consumption relative to the first state, wherein, for communication between the participants of the bus system, data frames are transmitted which comprise, inter alia, a message identification field (e.g. CAN message) and a useful-data field (e.g. CAN payload), wherein, according to said method, each participant, for switching from the first state to the second state, reacts on data frames with respectively predetermined data contents in the message identification field as well as in the useful-data field. Further, in the bus system, for selective switching of a participant from the first state to the second state, those data frames will be transmitted on whose message-identification-field contents and useful data-field-contents the selectively addressable participant reacts.

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Dortmund, Germany

Rainer Kraly