In some examples, a transport agnostic source includes a streaming device to stream video on diverse transport topologies including isochronous and non-isochronous transports. In some examples, a transport agnostic sink includes a receiving device to receive streamed video from diverse transport topologies including isochronous and non-isochronous transports.

A method for checking a message in a communication system, in which multiple users are connected to a communication medium that includes two signal lines and exchange messages via same. A time difference between points in time of reception of a message that is sent on the communication medium is ascertained at two different, predefined positions on the communication medium, and based on a comparison of the time difference to at least one reference time difference, it is determined whether the message originates from a verified user. During the ascertainment of the time difference at the two positions, in each case a difference signal is formed from signals that have resulted on the two signal lines due to the message.

A system synchronization method includes: connecting synchronization modules of a plurality of devices together through a synchronization bus. The synchronization modules include a signal generation module, a switch control module, a synchronization bus monitoring module, and a switch S1. A signal output terminal of the signal generation module is connected to a first terminal of the switch S1, and a timing overflow terminal of the signal generation module is connected to the switch control module configured to control the switch S1. The switch control module is connected to the synchronization bus monitoring module. A second terminal of the switch S1 is connected to the switch control module and the synchronization bus monitoring module. The system synchronization method has the advantages of simple structure, low cost, high reliability, and good practicability.

In some examples, a transport agnostic source includes a streaming device to stream video on diverse transport topologies including isochronous and non-isochronous transports. In some examples, a transport agnostic sink includes a receiving device to receive streamed video from diverse transport topologies including isochronous and non-isochronous transports.

Systems and methods for a controller area network braided ring are provided. In certain embodiments, a node within a controller area network braided ring includes a controller area network (CAN) controller that transmits and receives CAN messages according to CAN protocol. The node also includes braided ring availability integrity network (BRAIN) circuitry coupled to the CAN controller, wherein the BRAIN circuitry alters the received CAN messages from the CAN controller for transmission to other nodes within a BRAIN network and alters BRAIN messages received from the other nodes into CAN messages for processing by the CAN controller.

A system synchronization method includes: connecting synchronization modules of a plurality of devices together through a synchronization bus. The synchronization modules include a signal generation module, a switch control module, a synchronization bus monitoring module, and a switch S1. A signal output terminal of the signal generation module is connected to a first terminal of the switch S1, and a timing overflow terminal of the signal generation module is connected to the switch control module configured to control the switch S1. The switch control module is connected to the synchronization bus monitoring module. A second terminal of the switch S1 is connected to the switch control module and the synchronization bus monitoring module. The system synchronization method has the advantages of simple structure, low cost, high reliability, and good practicability.

Provided are a topology switching method based on isochronous channel, an apparatus, a system and a storage medium. The method is applied to a first central slave device. There are a plurality of first isochronous channels between the first central slave device and a master device, and there is a first communication channel between the first central slave device and a peripheral slave device. The method includes: sending, by first central slave device, first isochronization information to peripheral slave device through the first communication channel, where the first isochronization information includes a channel parameter of first isochronous channel, so that peripheral slave device starts data transmission with master device according to the channel parameter of first isochronous channel; and stopping, by first central slave device, data transmission with master device through the first isochronous channel, before peripheral slave device starts data transmission with master device.

The invention relates to a method for providing a fault-tolerant global time and for the fault-tolerant transport of time-controlled messages in a distributed real-time computer system which comprises external computers and a fault-tolerant message distribution unit, FTMDU. The FTMDU comprises at least four components which supply the global time to the external computers by means of periodic external synchronization messages, wherein the external computers each set their local clock to the received global time, wherein each external sender of a time-controlled message transmits two message copies of the message to be sent via two different communication channels to two different components of the FTMDU at periodic sending times defined a priori in timetables, wherein these two message copies are delivered within the FTMDU via two independent communication paths to those two components of the FTMDU which are connected to an external receiver of the message via communication channels.

The invention describes a method and a computer network for fault tolerant message transmission. Nodes of the network are connected to form a ring network. Nodes in the network form a summation group. For transmitting messages from the nodes of the summation group to a switch edge, nodes of the summation group generate and send summation frames. If a node participating in the summation group determines the non-arrival of a summation frame, it generates first recovery frame, inserts its message into said recovery frame, and sends this first recovery frame in the direction of the summation frame, which it was expecting. After sending the first recovery frame, it generates a second recovery frame, inserts its messages into said second right direction recovery frame, and sends said second right direction recovery frame to the switch.

In some examples, a transport agnostic source includes a streaming device to stream video on diverse transport topologies including isochronous and non-isochronous transports. In some examples, a transport agnostic sink includes a receiving device to receive streamed video from diverse transport topologies including isochronous and non-isochronous transports.