Train CCU (central control unit) load sharing method and system

Abstract

The invention discloses a train CCU (central control unit) load sharing method and system, which are based on a train communication network. The method includes the following steps that: auxiliary CCUequipment is arranged in the train communication network, and the auxiliary CCU equipment receives a first data packet sent by each communication equipment according to the own preset configuration table; the auxiliary CCU equipment integrates each received first data packet into a second data packet; and the auxiliary CCU equipment sends the second data packet to the CCU. According to the schemeof the invention, a plurality of data packets that need to be received by the CCU can be integrated into one data packet, so that the number of the data packets received by the CCU can be obviously reduced. By adopting the scheme of the invention, the communication pressure of the CCU can be reduced, and the overall communication load of the CCU can be reduced.

Description

technical field [0001] The invention relates to the technical field of rail transit, in particular to a method and system for load sharing of a train CCU central control unit. Background technique [0002] In the field of rail transit, connecting equipment in the train system, realizing train control, and detection and diagnosis are all completed through the train communication network. At present, the most widely used train communication technology is MVB (Multifunction Vehicle Bus) / WTB (Wire Train Bus, twisted train bus) technology, which has limited data volume. With the development of technology, more functions and better performance New and better trains have begun to enter people's lives. Because new trains need to implement more functions, the bandwidth of the original communication technology MVB / WTB is difficult to meet the bandwidth requirements of new trains for communication between devices. Ethernet With its high bandwidth advantage, it has been applied in new ...

AI Technical Summary

Problems solved by technology

At present, the most widely used train communication technology is MVB (Multifunction Vehicle Bus) / WTB (Wire Train Bus, twisted train bus) technology, which has limited data volume. With the development of technology, more functions and better performance New and better trains have begun to enter people's lives. Because new trains need to implement more functions, the bandwidth of the original communication technology MVB / WTB is difficult to meet the bandwidth requirements of new trains for communication between devices. Ethernet With its high bandwidth advantages, it has been applied in new trains. At present, the Ethernet bandwidth can reach 100Mbps or 1000Mbps, and a single data frame can carry up to 1500 bytes of data

[0003] As the amount of data increases, the train CCU (Central Control Unit, central control unit), as the core equipment in the train system, needs to complete various complex functions, such as figure 1 as shown, figure 1 It is a topological diagram of a train communication network in the prior art. There are five communication devices 3 except the CCU 1. The sending cycles are respectively T1=T2=T3=20ms, T4=T5=40ms, and the data packet size is 64 bytes, wherein, the number of sent packets: 50*3+25*2=200, the number of received packets: 50*3+25*2=200, the data flow that CCU 1 needs to send and receive per second is 200+200=400pps, when When the number of Ethernet data flows between CCU 1 and other communication devices 3 reaches a large amount, it will increase the communication pressure of CCU 1, thereby affecting the real-time performance of CCU 1 processing data, or causing problems such as data packet loss

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