Transmitting/receiving device for selectively waking up a subscriber station of a serial bus system and method for selectively waking up a subscriber station in a serial bus system

A subscriber station, comprising:

• a transmitting/receiving device including:
• a transmitting module configured to transmit a transmission signal, which is created for communication in the bus system based on a frame, as an analog signal to the bus of the bus system,
• a receiving module configured to receive an analog signal from the bus of the bus system and to generate a digital received signal from the analog signal received from the bus, and
• a wake-up module configured to wake up the subscriber station after the subscriber station has been put to sleep to save energy,
• wherein the wake-up module is configured to evaluate at least one wake-up condition to decide whether or not the digital received signal corresponds to a wake-up frame which sends instructions to activate the transmitting module to wake up the subscriber station, and
• wherein the wake-up module is configured to make the decision as to whether or not the digital received signal corresponds to the wake-up frame before the receiving module serially forwards a data field encoded in the digital received signal for useful data of the frame to the wake-up module;
• and
• a communication control device configured to sample and evaluate the digital received signal generated by the transmitting/receiving device according to a predetermined frame.

A bus system, comprising:

• a bus;
• a first subscriber station and a second subscriber station, each subscriber station of the first and second subscriber stations including:
• a transmitting/receiving device including:
• a transmitting module configured to transmit a transmission signal, which is created for communication in the bus system based on a frame, as an analog signal to the bus of the bus system,
• a receiving module configured to receive an analog signal from the bus of the bus system and to generate a digital received signal from the analog signal received from the bus, and
• a wake-up module configured to wake up the subscriber station after the subscriber station has been put to sleep to save energy,
• wherein the wake-up module is configured to evaluate at least one wake-up condition to decide whether or not the digital received signal corresponds to a wake-up frame which sends instructions to activate the transmitting module to wake up the subscriber station, and
• wherein the wake-up module is configured to make the decision as to whether or not the digital received signal corresponds to the wake-up frame before the receiving module serially forwards a data field encoded in the digital received signal for useful data of the frame to the wake-up module, and
• a communication control device configured to sample and evaluate the digital received signal generated by the transmitting/receiving device according to a predetermined frame;
• wherein the first subscriber stations is configured to transmit a wake-up frame to the bus of the bus system to selectively wake up at least one other subscriber station of the bus system after it has been put to sleep;
• and
• wherein the second subscriber station is connected to the first subscriber station via the bus such that the first and second subscriber stations can communicate with each other serially.

A method for selectively waking up a subscriber station in a serial bus system, wherein the method is carried out using a transmitting/receiving device which has a transmitting module, a receiving module, and a wake-up module, wherein the method comprises the following steps:

• transmitting, using the transmitting module, a transmission signal, which is created for communication in the bus system based on a frame, as an analog signal to the bus of the bus system;
• receiving, using the receiving module, an analog signal from the bus of the bus system;
• generating, using the receiving module, a digital received signal from the analog signal received from the bus;
• waking up, using the wake-up module, the subscriber station after the subscriber station has been put to sleep to save energy;
• wherein the wake-up module evaluates at least one wake-up condition in order to decide whether or not the digital received signal corresponds to a wake-up frame which sends instructions to activate the transmitting module to wake up the subscriber station;
• and
• wherein the wake-up module makes the decision as to whether or not the digital received signal corresponds to the wake-up frame before the receiving module serially forwards a data field encoded in the digital received signal for useful data of the frame to the wake-up module.