A method performed by an access and mobility management function (AMF), the method comprising receiving, from a User Equipment (UE), a first message including capability information related to a periodic registration timer, setting a periodic registration timer indication based on the capability information, and transmitting, to the UE, a second message including the periodic registration timer indication.

A method performed by an access and mobility management function (AMF), the method comprising receiving, from a User Equipment (UE), a first message including capability information related to a periodic registration timer, setting a periodic registration timer indication based on the capability information, and transmitting, to the UE, a second message including the periodic registration timer indication.

The present disclosure provides a registration switching method, a request processing method, an information sending method, and a related device. The method includes: camping on a network node supporting an NB service, and performing combined registration with a network supporting the NB service and a network supporting a WB service; and switching to a network node supporting the WB service, to transmit the WB service.

The present disclosure provides a registration switching method, a request processing method, an information sending method, and a related device. The method includes: camping on a network node supporting an NB service, and performing combined registration with a network supporting the NB service and a network supporting a WB service; and switching to a network node supporting the WB service, to transmit the WB service.

Accordingly, embodiments herein disclose a method performed by a user equipment (UE) in a wireless communication system. The method comprises receiving, from an access and mobility management function (AMF), a non-access stratum (NAS) message, wherein the non-access stratum (NAS) message includes information indicating whether the UE is registered for emergency services and determining registering for the emergency services based on the NAS message.

Accordingly, embodiments herein disclose a method performed by a user equipment (UE) in a wireless communication system. The method comprises receiving, from an access and mobility management function (AMF), a non-access stratum (NAS) message, wherein the non-access stratum (NAS) message includes information indicating whether the UE is registered for emergency services and determining registering for the emergency services based on the NAS message.

A system and method for determining registration to a packet-switching (PS) domain or a circuit-switching (CS) domain via a single request is discussed herein. A single request includes a query hierarchy to query a node of a first domain and then, if the UE is not registered with the first domain, to query a node of a second domain. The request includes an attribute value pair (AVP) to determine which domain to query first and which node of the first domain to query. The domains of the AVP are acquired from a list to permit multiple domains to be queried with the single request.

A system and method for determining registration to a packet-switching (PS) domain or a circuit-switching (CS) domain via a single request is discussed herein. A single request includes a query hierarchy to query a node of a first domain and then, if the UE is not registered with the first domain, to query a node of a second domain. The request includes an attribute value pair (AVP) to determine which domain to query first and which node of the first domain to query. The domains of the AVP are acquired from a list to permit multiple domains to be queried with the single request.

The present invention relates to a wireless communication system and method for establishing connection between a User Equipment (UE) and a Mobility Management Entity (MME) in the wireless communication system in which the data-centric terminal requests the mobility management entity for attachment and checks, when the mobility management entity responds, data-centric features supported by the mobility management entity. According to the present invention, it is possible to connect the data-centric terminal to the mobility management entity supporting the data-centric features of the corresponding data-centric terminal efficiently in the wireless communication system.

The present invention relates to a wireless communication system and method for establishing connection between a User Equipment (UE) and a Mobility Management Entity (MME) in the wireless communication system in which the data-centric terminal requests the mobility management entity for attachment and checks, when the mobility management entity responds, data-centric features supported by the mobility management entity. According to the present invention, it is possible to connect the data-centric terminal to the mobility management entity supporting the data-centric features of the corresponding data-centric terminal efficiently in the wireless communication system.