A link state packet transmission method and a routing node are disclosed. The method is applied to a tree topology, where the tree topology includes a leaf routing node, an intermediate routing node, and a root routing node. The method includes: receiving, by the intermediate routing node, a link state packet sent by a child routing node of the intermediate routing node; sending, by the intermediate routing node, the link state packet to the root routing node, where the root routing node is configured to aggregate received link state packets to obtain a link state packet set; receiving, by the intermediate routing node, the link state packet set sent by the root routing node; and sending, by the intermediate routing node, the link state packet set to the child routing node of the intermediate routing node.

A method is provided for protecting a vehicle network of a vehicle against manipulated data transmission, in which the vehicle network includes multiple network nodes, and at least one first network node in the vehicle network in a normal mode checking a first received message as to whether the first received message is a message assigned to the first network node in the normal mode, but which the first network node did not transmit. The first network node in a diagnostic mode further checks a second received message as to whether the second received message is a message assigned to the first network node in the normal mode or in the diagnostic mode, but which the first network node did not transmit.

An operation method of a communication node in a vehicle network may comprise performing a transition of an operation mode of the communication node from a sleep mode to a normal mode when a predetermined event is detected; transmitting a wake-up signal when the operation mode transitions from the sleep mode to the normal mode; generating a network management (NM) message including information indicating a wake-up reason corresponding to the wake-up signal; and transmitting the NM message.

A hybrid hub-and-spoke communications network with hub-bypass communications paths is disclosed. An edge router receives, from a first origination network gateway node, a first packet destined for a first destination network gateway node. The edge router is communicatively coupled to a hybrid hub-and-spoke and hub-bypass data communications network. The edge router determines that the first packet is to be routed to the first destination network gateway node via a first hub-bypass communications path of the hybrid hub-and-spoke and hub-bypass data communications network. The edge router adds one or more segment identifiers to a header of the first packet that defines the first hub-bypass communications path, and sends the header and the first packet to the first spoke router.

A network hub is provided for an onboard network system. The onboard network system includes first and second networks for transmission of first-type and second-type frames following first and second communication protocols. The network hub includes a receiver that receives a first-type frame. A processor determines whether or not the first-type frame received by the receiver includes first information that is a base for a second-type frame to be transmitted to the second network, to obtain a determination result, and selects a port to send a frame based on the first-type frame based on the determination result. A transmitter sends the frame based on the first-type frame to a wired transmission path connected to the port selected by the processor based on the first-type frame received by the receiver.

A secure star coupler in a communication network adopting a time-triggered protocol based on a time slot include: transceivers each of which is connected to one of branches and transmits and receives signals; a routing table holder that holds a predetermined rule indicating a correspondence between a time slot and a branch; and a router that routes a signal received from a first branch to another branch unless a no-transfer condition is satisfied. The no-transfer condition includes a condition that the predetermined rule is not followed by the first branch and a condition that routing of a signal received from a second branch different from the first branch has started in the time slot.

A network arrangement is provided for a charging park for providing IP services to the charging park. The charging park has a plurality of components. The network arrangement comprises a core network, a backend server and a central gateway that is coupled to the core network and to the backend server. The central gateway provides an interface for one or more communication nodes of the core network. The components of the charging park are connected communicatively to one another and to the central gateway via the core network. Each component of the charging park has an associated communication node of the core network, and the components of the charging park can interchange data with the backend server via the central gateway via their respective associated communication nodes and the interfaces associated with the communication nodes. Further, the invention relates to a method for addressing components of the charging park.

A machine automation system for controlling and operating an automated machine. The system includes a controller and sensor bus including a central processing core and a multi-medium transmission intranet for implementing a dynamic burst to broadcast transmission scheme where messages are burst from nodes to the central processing core and broadcast from the central processing core to all of the nodes.

An operation method of a first communication node comprises: receiving a first frame from a second communication node; obtaining a destination address of the first frame; and transmitting a second frame including an indicator for indicating an occurrence of an error in the first frame to a communication node corresponding to a source address of the first frame, when a port corresponding to the destination address does not exist in a routing table.

This electronic device for receiving data via an asynchronous communication network including at least one elementary network, is configured to be connected to said elementary network and comprises: a receiving module configured to receive several successive data frames via the asynchronous communication network, each frame being sent over the elementary network according to a predefined sending table and with a minimum time gap between the sending time instants of two successive frames, a verification module configured, for at least two received data frames, to estimate a network jitter from the minimum time gap and reception time instants of at least two frames received on said elementary network, then to compare the estimated jitter to an authorized range of network jitter values.