A vehicle-mounted network system and a communication method thereof

An in-vehicle network and sub-network technology, applied in transmission systems, data exchange networks, digital transmission systems, etc., can solve problems such as increasing the complexity of cabinet and cable deployment, increasing the complexity and cost of maintenance and management, and increasing the cost of train manufacturing. , to reduce complexity and maintenance costs, achieve business diversification, and ensure security and stability

An in-vehicle network and sub-network technology, applied in transmission systems, data exchange networks, digital transmission systems, etc., can solve problems such as increasing the complexity of cabinet and cable deployment, increasing the complexity and cost of maintenance and management, and increasing the cost of train manufacturing. , to reduce complexity and maintenance costs, achieve business diversification, and ensure security and stability

CN109040249AActive Publication Date: 2018-12-18CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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  • A vehicle-mounted network system and a communication method thereof
  • A vehicle-mounted network system and a communication method thereof
  • A vehicle-mounted network system and a communication method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] Embodiment 1: define the first subnetwork A as the primary network, and the second subnetwork B as the secondary network.

[0084] The train access units TAU in the first sub-network A and the second sub-network B send messages in their respective sub-networks simultaneously. If the first subnetwork A is normal, the data in the first subnetwork A is accepted; if the first subnetwork A fails, the data in the second subnetwork B is accepted.

[0085] see figure 2 , the central control unit CCU sends the message 1 in the first subnetwork A and the second subnetwork B at the same time, and they are hot standby for each other. If the first subnetwork A is normal, the data in the first subnetwork A is accepted, and when the second When a subnetwork A fails, the data in the second subnetwork B is accepted. The smoke and fire alarm system FAS sends message 2 in the second subnetwork B, and at the same time sends it to the central control unit CCU, and the central control uni...

Embodiment 2

[0087] Embodiment 2: The second subnetwork B is defined as the primary network, and the first subnetwork A is the secondary network.

[0088] The train access units TAU in the first sub-network A and the second sub-network B send messages in their respective sub-networks simultaneously. If the second subnetwork B is normal, the data in the second subnetwork B is accepted; if the second subnetwork B fails, the data in the first subnetwork A is accepted.

[0089] continue to see figure 2 , the central control unit CCU sends the message 1 in the first subnetwork A and the second subnetwork B at the same time, and they are hot standby for each other. If the second subnetwork B is normal, the data in the second subnetwork B is accepted. When the second subnetwork B fails, the data in the first subnetwork A is accepted. The smoke and fire alarm system FAS sends message 2 in the second subnetwork B, and at the same time sends it to the central control unit CCU, and the central con...

Embodiment 3

[0091] Embodiment 3: The first sub-network A and the second sub-network B are used regardless of primary and secondary, and both sub-networks work normally.

[0092] The train access unit TAU ​​in the first sub-network A and the second sub-network B sends the messages in their respective sub-networks simultaneously, and the receiver, according to the network status and network data in the two sub-networks, if the first sub-network A If the network state and network data of the second subnetwork B are better than those of the second subnetwork B, then the data in the first subnetwork A is accepted. Conversely, if the network state and network data in the second subnetwork B are better than those in the first subnetwork A, then the data in the second subnetwork B is accepted.

[0093] The central control unit CCU sends the message 1 in the first subnetwork A and the second subnetwork B at the same time, which are mutual hot backup. If the network state and network data in the f...

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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...

Claims

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Application Information

Patent Timeline
18 Dec 2018
Publication
CN109040249A
IPC
H04L29/08; H04L12/24; H04L29/06
CPC
H04L41/0826; H04L41/0836; H04L63/02; H04L67/12; H04L41/0663; H04L12/40143; H04L12/40189; B61L15/0036
Inventors
徐燕芬; 朱游龙