title Lost Connection flow
participant E2 Manager as E2M
participant E2 Terminator instance as E2T
participant RanDisconnectionManager as RDM
participant E2tAssociationManager as EAM
participant rNib DB as RNIB

E2T->E2M: LOST CONNECTION 
E2M->RDM: DisconnectRan
RDM->RNIB: GetNodeb
RNIB->RDM: ok
        alt RAN's connection status is SHUT_DOWN
            note over RDM: return
        else RAN's connection status is SHUTTING_DOWN
            RDM->RNIB: UpdateNodeb(SHUT_DOWN) 
            RNIB->RDM: ok
            note over RDM: return
        else
            RDM->RNIB: UpdateNodeb(DISCONNECTED)
            RNIB->RDM: ok
            RDM->+EAM: DissociateRan(ranName, e2tAddress)
            note over EAM: Detailed in another sequence diagram...
            EAM-->-RDM: ok
        end