A vehicle-mounted network system and a communication method thereof

Abstract

The invention relates to a vehicle-mounted network system and a communication method thereof. The vehicle-mounted network system comprises a signal system device, a TCMS device, other vehicle-mountednetwork subsystem devices and two mutually independent subnetworks. The signal system equipment is directly connected to the first sub-network A and the second sub-network B respectively. The TCMS device and other vehicle-mounted network subsystem devices are classified into key subsystem equipments with high security level and common subsystem equipments with low security level according to security level, The key subsystem equipment is connected to the first subnetwork A and the second subnetwork B through two or more communication interfaces, and the common subsystem equipment is directly connected to the first subnetwork A or / and the second subnetwork B. The invention integrates the signal system network and the TCMS network into the same network, reduces the complexity of the vehicle-mounted network system and reduces the fault point of the system. The two sub-networks are hot-standby each other, which can ensure that the normal operation of on-board network equipment is not be affected when any one of them has an irrecoverable failure.

Description

technical field [0001] The invention belongs to the technical field of rail vehicle network communication, and in particular relates to a vehicle-mounted network system and a communication method applicable to a train control and signaling system of a train autonomous operation system (abbreviation: TACS). Background technique [0002] Traditional in-vehicle network systems usually consist of multiple networks with different service types. For example: the signaling system network serving the train autonomous operation system, and the train network control system (abbreviation: TCMS) network serving train control and maintenance management. There are following problems in this vehicle network system: [0003] 1. There are multiple sets of networks at the same time, resulting in high network complexity and increased failure points; [0004] 2. There are multiple sets of networks, which increases the manufacturing cost of trains and increases the complexity of cabinet and ca...

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Problems solved by technology

[0003] 1. There are multiple sets of networks at the same time, resulting in high network complexity and increased failure points;

[0004] 2. There are multiple sets of networks, which increases the manufacturing cost of trains and increases the complexity of cabinet and cable deployment;

[0005] 3. Each network is isolated from each other, resulting in the inability of vehicle maintenance personnel to perform maintenance and management in a unified manner, which increases the complexity and cost of maintenance management

[0006] If the TCMS network and the signaling system network are directly incorporated into the same physical network, the network can be simplified, but due to the existence of low-level security subsystem equipment in the TCMS network, it is easy to introduce risks, resulting in uncontrollable signaling systems, which will hinder the autonomous operation of trains. system security risks

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