ISO 21806-14-2021 pdf free download -Road vehicles — Media Oriented Systems Transport (MOST) — Part 14: Lean application layer.
12.2 Requests, responses, and events
12.2.1 Lean network services The network supervisor uses Init_LNS_Request to initialise the lean network services. In Init_LNS_ Response , if Status indicates success , the initialisation of the lean network services is completed. The value error indicates invalid parameters. The network supervisor uses Stop_LNS_Request to stop the network management processes (see Clause 13) of the lean network services. In Stop_LNS_Response , if Status indicates success , the lean network services are stopped after completing the requested actions. The value error indicates that the lean network services terminated the management processes after expiration of t LNS_Termination . The management processes are reset without completing all requested actions.
12.2.2 Network startup and shutdown The network supervisor uses Network_Startup_Request to start up the MOST network. In Network_ Startup_Response , if Status indicates success , the network is active. The value error indicates failure during startup. The network supervisor uses Network_Shutdown_Request to shut down the MOST network. In Network_ Shutdown_Response , if Status indicates success , the network is shut down. The value error indicates that the request is currently not allowed. The lean network services use the Network_Status_Event to inform the network supervisor about a change in either network availability or a related parameter.
12.2.3 Node discovery The network supervisor uses Node_Discovery_Start_Request to commence node discovery. In Node_ Discovery_Start_Response , if Status indicates success , the node discovery process is running. The value error indicates missing preconditions, for example, a successful network startup. The lean network services use Node_Discovery_Event to inform the network supervisor that a node is discovered. The network supervisor compares the signature to the network descriptor and sends Node_Welcome_Request . When the remote node is added to the network, the network supervisor sends Node_Availability_Set_Request (available) . The network supervisor uses Node_Welcome_Request to instruct the lean network services to send Welcome_StartResult to a remote node. In Node_Welcome_Response , if Status indicates success , the node identified by the signature is added to the network and becomes part of the network configuration. The value error indicates a transmission error during the “Welcome” sequence for the corresponding node. The network supervisor uses Node_Availability_Set_Request to set the Availability property of a node. In Node_Availability_Set_Response , if Status indicates success , the connection management processes connections related to the corresponding node. The value error indicates invalid parameters. The network supervisor uses Node_Discovery_Stop_Request to terminate node discovery. In Node_ Discovery_Stop_Response , if Status indicates success , the node discovery process is stopped. The value error indicates that the process is still running. The network supervisor uses Check_Uniqueness_Request to determine why two remote nodes report identical signatures. When an already available node responds to node discovery, the network supervisor checks whether a reset occurred or two remote nodes with identical signatures exist. In Check_Uniqueness_Response , if Status indicates success , there is only one node with that signature in the network. The value error indicates the presence of two nodes with identical signatures.
12.2.4 Connection management The network supervisor uses Connection_Management_Start_Request to start the connection management. In Connection_Management_Start_Response , if Status indicates success , the connection management is processing the network descriptor. The value error indicates a missing resource and the lean network services should be initialised again.ISO 21806-14 pdf download.