The present inventive concept relates to a node for use in positioning of a wireless unit, the node comprising: a transmitter arranged to broadcast system information arranged to trigger a registration, the system information comprising a first registration area code; a receiver arranged to receive registration requests from wireless devices in receipt of the system information, wherein the node is arranged to, in response to a registration request received from any wireless device in receipt of the broadcasted system information, transmit, via the transmitter, a response to said any wireless device indicating that the registration request is rejected, and change the first registration area code to a second registration area code when a registration area code update condition is met.

Method for scheduling paging in telecommunication network making the list candidate base station to send paging message. This method based on the Haversine formula to calculate distance between pair of base station from position information (latitude, longitude) and filter by situation: Distance=<Δ*Min (which Δ is 3) to make the list candidate base station for each of base station in list input. This method is useable for the telecommunication system which need to page UE for mobile terminated (MT) service.

Method for scheduling paging in telecommunication network making the list candidate base station to send paging message. This method based on the Haversine formula to calculate distance between pair of base station from position information (latitude, longitude) and filter by situation: Distance=<Δ*Min (which Δ is 3) to make the list candidate base station for each of base station in list input. This method is useable for the telecommunication system which need to page UE for mobile terminated (MT) service.

Provided are a method for transmitting data and a network device, which are applied to a terminal device in an inactive state, the inactive state referring to that both the terminal device and a first network device retain context information of the terminal device and that the communication connection of the terminal device between the first network device and a core network device is maintained. The method comprises: the first network device sending downlink data for the terminal device to the terminal device by means of a second network device, the first network device being different from the second network device. With the method of the embodiments of the present invention, the downlink data is sent by means of the second network device, which may effectively improve the success rate of data transmission and improve the user experience.

Provided are a method for transmitting data and a network device, which are applied to a terminal device in an inactive state, the inactive state referring to that both the terminal device and a first network device retain context information of the terminal device and that the communication connection of the terminal device between the first network device and a core network device is maintained. The method comprises: the first network device sending downlink data for the terminal device to the terminal device by means of a second network device, the first network device being different from the second network device. With the method of the embodiments of the present invention, the downlink data is sent by means of the second network device, which may effectively improve the success rate of data transmission and improve the user experience.

This application discloses a communications method and apparatus, to resolve a problem that a terminal device can still receive downlink LADN data when moving out of an LADN SA. The method includes: receiving, by a RAN node, a first message from an AMF node, where the first message includes specified area related information of a terminal device, and the specified area related information is used to indicate a specified area of the terminal device; and when the RAN node determines, based on the specified area related information and first location information of the terminal device, that the terminal device moves out of the specified area, sending, by the RAN node, the first location information or first indication information to the AMF node or an SMF node, where the first indication information is used to indicate that the terminal device already moves out of the specified area.

The present disclosure relates to example SMS processing methods in an Internet of Things, mobility management network elements, and terminal devices, to provide an SMS service for an Internet of Things terminal device. One example method includes receiving, by a mobility management network element in a packet switched (PS) domain, a non-combined registration request from a terminal device, where the non-combined registration request carries SMS only indication information. When determining that the mobility management network element in the PS domain cannot transfer an SMS for the terminal device through the PS domain, the mobility management network element in the PS domain sends a location update request to a mobility management network element in a circuit switched (CS) domain The location update request is used to implement registration of the terminal device with the CS domain.

The present disclosure relates to example SMS processing methods in an Internet of Things, mobility management network elements, and terminal devices, to provide an SMS service for an Internet of Things terminal device. One example method includes receiving, by a mobility management network element in a packet switched (PS) domain, a non-combined registration request from a terminal device, where the non-combined registration request carries SMS only indication information. When determining that the mobility management network element in the PS domain cannot transfer an SMS for the terminal device through the PS domain, the mobility management network element in the PS domain sends a location update request to a mobility management network element in a circuit switched (CS) domain The location update request is used to implement registration of the terminal device with the CS domain.

The present disclosure relates to a communication technique for combining, with an IoT technology, a 5G communication system for supporting a data transmission rate higher than that of a 4G system, and to a system therefor. The present disclosure may be applied to intelligent services (e.g., a smart home, a smart building, a smart city, a smart car or connected car, healthcare, digital education, retail business, security and safety-related service, etc.), based on a 5G communication technology and an IoT-related technology. A method for a user equipment in a first communication system according to the present invention comprises steps in which a user equipment in an inactive state: transmits a paging area update request message; checks whether or not a timer associated with a paging area update has expired; and transitions into an idle state if a response message for the paging area update request message has not been received until the timer has expired.

The present disclosure relates to a communication technique for combining, with an IoT technology, a 5G communication system for supporting a data transmission rate higher than that of a 4G system, and to a system therefor. The present disclosure may be applied to intelligent services (e.g., a smart home, a smart building, a smart city, a smart car or connected car, healthcare, digital education, retail business, security and safety-related service, etc.), based on a 5G communication technology and an IoT-related technology. A method for a user equipment in a first communication system according to the present invention comprises steps in which a user equipment in an inactive state: transmits a paging area update request message; checks whether or not a timer associated with a paging area update has expired; and transitions into an idle state if a response message for the paging area update request message has not been received until the timer has expired.