N1N2MessageSubscribe N1N2MessageUnSubscribe N1N2MessageTransfer Request/Response SMF, SMSF, PCF, and LMF N1N2TransferFailureNotification Subscribe/Notify SMF, SMSF, PCF, and LMF N2InfoSubscribe Subscribe/Notify NOTE 1 N2InfoSubscribe NOTE 1 N2InfoNotify AMF, LMF EBIAssignment Request/Response AMFStatusChangeSubscribe Subscribe/Notify SMF, PCF, NEF, SMSF, and UDM AMFStatusChangeUnSubscribe Subscribe/Notify SMF, PCF, NEF, SMSF, and UDM AMFStatusChangeNotify Subscribe/Notify SMF, PCF, NEF, SMSF, and UDM NonUeN2MessageTransfer Request/Response Peer AMF, CBCF,PWS-IWF and LMF NonUeN2InfoSubsribe Subscribe/Notify CBCF and PWS-IWF NonUeN2InfoUnSubsribe CBCF and PWS-IWF NonUeN2InfoNotify CBCF, PWS-IWF, and LMF Namf_EventExposure Subscribe Subscribe/Notify NEF, SMF, UDM, NWDAF, and LMF UnSubscribe Subscribe/Notify NEF, SMF, UDM, NWDAF, and LMF Notify Subscribe/Notify NEF, SMF, UDM, NWDAF, and LMF Namf_MT EnableUEReachability Request/Response SMSF and SMF ProvideDomainSelectionlnfo Request/Response Namf_Location ProvidePositioningInfo Request/Response EventNotify Subscribe/Notify ProvideLocationInfo Request/Response CancelLocation Request/Response Figure 3.11 - Services produced by the AMF The eNamf_Communication_N1N2MessageUnSubscribe service operation is used by a network function to unsubscribe with the AMF, for it to stop notifications for N1, or N2 for UE. The Namf_Communication_N1N2MessageTransfers service operation is used by a network function totransportadownlink N1orN2 message to UE or the AN through the AMF. The mf_Communication_N1N2TransferFailureNotification service operation is used by the AMF to notify a consumer network function that an earlier Communication_N1N2MessageTransfers service operation has failed. REST in 5G The Namf_Communication_N2InfoSubscribe and Namf_Communication N2InfoUnsubscribe service operations are invoked by a consumer network function to subscribe/unsubscribe to the delivery information contained in a particular N2 message type. TheNamf_Communication_N2InfoNotify service operation is 