In this paper , We will discuss NM（ Network management ） Interface and CAN Bus specific NM modular , They are AUTOSAR Part of the service layer of a layered software architecture .

1 Network management interface ：

Network Management Interface Is between ComM and Bus Specific NM A module between modules , In this article we will CANNM Considered bus specific NM.NM The interface has two functions ,

• Basic function – Act as a bus specific NM Module and ComM Adaptation modules between modules .NM Interface and ComM The communication interface between modules is independent of the specific module of the underlying bus .

chart 1 Network management

• NM Coordinator – gateway ECU Use it to synchronously turn off the communication bus . It USES NM Coordinate algorithms to close connections ECU Bus of . Use NM Coordinator Functional ECU be called NM Coordinator.

When each ECU Is awake and not in “ Bus sleep mode ” when , Network management algorithm , Coordinate all functions on the bus ECU Coordinate and close .NM Coordinator Yes, to be in “ Bus sleep mode ” Monitor your network , Just coordinate one bus in the cluster （NM colony – Use NM A set of algorithms coordinated NM node ） I'm awake ,NM The coordinator should still keep the network active . When the coordination algorithm starts , Start and close the delay timer for the currently active channel in the coordination network . When Shutdown Delay Timer timeout ,NM Should be released NM The Internet . When all networks are released and all networks are in “ Bus sleep mode ” when , Coordinate the various ECU The closed algorithm is completed .

2 CAN Network management

CANNM Used to coordinate the network