Research and design of protocol analyzer for Multifunction Vehicle Bus

Multifunction vehicle bus (MVB) is a standard protocol defined in train communication network criterion, and used for transmitting information among various equipments inside the vehicle. In order to insure compatibility and inter-operability among the MVB equipment, it requires that the data transmitted in the bus need to be collected, and correctness and reliability of data transmission of the MVB network should be analyzed. Base on the characters of periodically broadcasting and master slave frame response. According to IEC61375 standard, this paper proposes a method to implement an analyzer for MVB device protocol. In the method, the transmitted data on the bus are sampled using error-tolerance decode algorithm, and then the compatibility and dependability of data transmission among devices are analyzed via protocol analysis application. The experiment results showed that the analyzer can exactly validate the design of the equipment on the MVB bus.