Research on MVB protocol conformance testing

The Multifunction Vehicle Bus (MVB) is a kind of communication protocol which is defined explicitly in the Train Communication Network standard, and it is used to transfer information among devices inside vehicles. In order to assure the compatibility and interoperability of the MVB devices from different manufacturers, the protocol conformance testing for MVB devices should be carried out. According to the basic operation principles of protocol conformance testing, the features of the MVB protocol are analyzed. The test methods and contents about how to execute conformance testing on MVB devices are put forward. Taking the Process Data Link Layer as an example, the testing requirements, testing case genaration, testing operation and testing evaluation are expounded in detail. The protocol conformance testing system based on the embedded 80486 CPU and μC/OS-II real-time multitask operation system is designed and constructed in the laboratory environment. Finally, the high coverage conformance testing experiments of the MVB Process Data Link Layer Protocol are executed. The results provide some useful reference to further conformance testing of MVB protocols.