A method, a device, and a non-transitory storage medium are described in which a mobility management service is provided. The service may evaluate geospatial, performance metric, and neighbor criteria data relating to overlap areas between source cells and candidate target cells. The service may calculate composite values for each candidate target cell and select the candidate target cell based on the composite value. The service may manage the mobility of end devices and associated mobility procedures on a sub-sector, sector, cell, and cluster of cell level. The service may reconfigure network devices and the end device to satisfy optimization, healing, and site planning measures.

A method, a device, and a non-transitory storage medium are described in which a mobility management service is provided. The service may evaluate geospatial, performance metric, and neighbor criteria data relating to overlap areas between source cells and candidate target cells. The service may calculate composite values for each candidate target cell and select the candidate target cell based on the composite value. The service may manage the mobility of end devices and associated mobility procedures on a sub-sector, sector, cell, and cluster of cell level. The service may reconfigure network devices and the end device to satisfy optimization, healing, and site planning measures.

Apparatuses, methods, and systems are disclosed for NSSAI configuration. One method includes determining a configured network slice selection assistance information for a public land mobile network for a remote unit in response to a trigger from an access and mobility management function. The access and mobility management function, a network slice selection function, or a combination thereof determines the configured network slice selection assistance information. The method includes providing the configured network slice selection assistance information to the remote unit via the access and mobility management function.

Apparatuses, methods, and systems are disclosed for NSSAI configuration. One method includes determining a configured network slice selection assistance information for a public land mobile network for a remote unit in response to a trigger from an access and mobility management function. The access and mobility management function, a network slice selection function, or a combination thereof determines the configured network slice selection assistance information. The method includes providing the configured network slice selection assistance information to the remote unit via the access and mobility management function.

The present disclosure relates to a 5th generation (5G) or pre-5G communication system for supporting a higher data transmission rate after a 4th generation (4G) communication system such as long-term evolution (LTE). According to various embodiments of the present disclosure, according to various embodiments of the present disclosure, an operating method of a network exposure function (NEF) in a wireless communication system is provided. The method includes receiving a Nnef_EventExposure_subscribe request message including a first non-subscription registration identifier (ID) from an application function (AF), transmitting a Namf_EventExposure_subscribe request message including the first non-subscription registration ID to a default unified data management (UDM), receiving a Namf_EventExposure_subscribe response message including a subscription correlation ID from the default UDM, transmitting a Nnef_EventExposure_subscribe response message including the subscription correlation ID to the AF, receiving a Namf_EventExposure_Notify message including a second non-subscription registration ID from the default UDM, and transmitting a Nnef_EventExposure_Notify message including the second non-subscription registration ID to the AF.

The present disclosure relates to a 5th generation (5G) or pre-5G communication system for supporting a higher data transmission rate after a 4th generation (4G) communication system such as long-term evolution (LTE). According to various embodiments of the present disclosure, according to various embodiments of the present disclosure, an operating method of a network exposure function (NEF) in a wireless communication system is provided. The method includes receiving a Nnef_EventExposure_subscribe request message including a first non-subscription registration identifier (ID) from an application function (AF), transmitting a Namf_EventExposure_subscribe request message including the first non-subscription registration ID to a default unified data management (UDM), receiving a Namf_EventExposure_subscribe response message including a subscription correlation ID from the default UDM, transmitting a Nnef_EventExposure_subscribe response message including the subscription correlation ID to the AF, receiving a Namf_EventExposure_Notify message including a second non-subscription registration ID from the default UDM, and transmitting a Nnef_EventExposure_Notify message including the second non-subscription registration ID to the AF.

This invention is a system and method for implementing a VoLTE and circuit switched voice and SMS interworking function to provide voice and SMS service to roaming mobile devices at visiting network based on Circuit-switched (CS) roaming towards VPLMN, and VoLTE voice and SMS roaming towards HPLMN. The interworking function translates CS signaling with VPLMN into IMS signaling towards IMS core at HPLMN. The interworking function also performs location-update registration at HSS at HPLMN for receiving mobile-terminated voice calls and SMS.

This invention is a system and method for implementing a VoLTE and circuit switched voice and SMS interworking function to provide voice and SMS service to roaming mobile devices at visiting network based on Circuit-switched (CS) roaming towards VPLMN, and VoLTE voice and SMS roaming towards HPLMN. The interworking function translates CS signaling with VPLMN into IMS signaling towards IMS core at HPLMN. The interworking function also performs location-update registration at HSS at HPLMN for receiving mobile-terminated voice calls and SMS.

A wireless User Equipment (UE) controls a wireless network slice type that has slice requirements. In the UE, source Radio Resource Control (RRC) circuitry exchanges source signaling with a source Access and Mobility Management Function (AMF). During the exchange of the source signaling, target RRC circuitry exchanges target signaling with target AMFs and determines AMF characteristics. The target RRC circuitry compares the AMF characteristics to the slice requirements and selects one of the target AMFs based on the comparison. The source or target RRC circuitry exchange additional target signaling with the selected one of the target AMFs to use the wireless network slice type. User-plane circuitry exchanges user data with the wireless network slice which is controlled by the selected target AMF.

A wireless User Equipment (UE) controls a wireless network slice type that has slice requirements. In the UE, source Radio Resource Control (RRC) circuitry exchanges source signaling with a source Access and Mobility Management Function (AMF). During the exchange of the source signaling, target RRC circuitry exchanges target signaling with target AMFs and determines AMF characteristics. The target RRC circuitry compares the AMF characteristics to the slice requirements and selects one of the target AMFs based on the comparison. The source or target RRC circuitry exchange additional target signaling with the selected one of the target AMFs to use the wireless network slice type. User-plane circuitry exchanges user data with the wireless network slice which is controlled by the selected target AMF.