A wireless device receives access network information indicating an access network type. Based on the access network type, a non-access stratum (NAS) period is selected among: a first value associated with a geostationary earth orbit (GEO) non-terrestrial network (NTN) access network type; and a second value associated with a low earth orbit (LEO) NTN access network type. A NAS procedure is initiated by sending a NAS request message. A start of the NAS period is based on the sending. The NAS procedure is aborted based on an expiry of the NAS period.

Embodiments described herein provide methods and apparatus for configuring a service based architecture for discovery of a Network Function, NF. A method in a Network Function Discovery Orchestration includes configuring, in a domain name system, DNS, a first DNS entry associating a first domain name of the NF with at least one NF Internet Protocol, IP, address of the NF, and a second DNS entry associating the first domain name with at least one edge security node IP address of an edge security node in the first PLMN, wherein, the first DNS entry is for use in resolving requests for the NF which originate from within the first PLMN, and the second DNS entry is for use in resolving requests for the NF which originate from outside the first PLMN. Further methods and apparatus in a Network Repository Function, a Domain Name System and an edge security node are also provided.

A method, a device, and a non-transitory storage medium are described in which beam configuration management service is provided. A network device of a wireless access network provides the service that includes identifying redundant configurations across carriers associated with a cell group, and links the common beam configurations to these carriers. The service also includes identifying any difference in beam configurations relative to the common beam configurations for a carrier. The service may transmit this beam configuration information in a control plane message to an end device. The end device may use the beam configuration information.

Multiple mobile cellular network (MCN) communication systems can be networked together to form a network of MCN communication systems (NOM). Each MCN communication system within the NOM can operate as an independent cellular network to provide communications between user equipment within a covered area. When a UE in one MCN of the NOM moves into a different MCN of the NOM, the corresponding MCN communication systems can handover the UE. The UE can also be handed over between MCN communication systems when the MCN communication systems move.

Disclosed is a 5.sup.th generation (5G) or pre-5G communication system for supporting a data transmission rate higher than that of a 4.sup.th generation (4G) communication system such as long term evolution (LTE). According to various embodiments of the disclosure, provided is a method for operating an access and mobility management function (AMF) in a wireless communication system, comprising the steps of: receiving, from user equipment (UE), a service request including a list of protocol data unit (PDU) sessions to be activated, or a message about a mobility registration update; checking, on the basis of UE context information about the UE, whether identifiers (IDs) of all of always-on PDU sessions are included in the list of PDU sessions to be activated; and, when an omitted always-on PDU session is checked from the list of the PDU sessions to be activated, transmitting, to a session management function (SMF), a Nsmf_PDUSession_UpdateSMContext request message for requesting user plane activation of the omitted always-on PDU session.

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, an operating method of a terminal in a wireless communication system provide a method including performing a registration procedure for a first public land mobile network (PLMN), receiving a downlink (DL) non-access-stratum (NAS) transport message including slice roaming information from an access and mobility management function (AMF) of the first PLMN, transmitting an uplink (UL) NAS transport message to the AMF, and performing a PLMN selection procedure using the slice roaming information.

Systems and methods are provided for public land mobile network (PLMN) selection for disaster roaming. A user equipment (UE) determines a disaster condition at a first PLMN, where the UE is a subscriber of the first PLMN. The UE determines an availability of a second PLMN for disaster roaming. The UE selects the second PLMN and attempts registration on the second PLMN for disaster roaming. In response to attempting the registration on the second PLMN for disaster roaming, the UE receives a registration reject message including a cause value corresponding to a registration failure for disaster roaming on the second PLMN due to the disaster condition on the first PLMN. The UE waits for a first period of time before again attempting to register for disaster roaming on the second PLMN for the first PLMN with the disaster condition.

A request for registration by a User Equipment (UE) to a cellular network is handled. The geographical coverage of the cellular network is divided into a plurality of tracking areas, each tracking area having a respective identifier. A registration request message is communicated from the UE to the cellular network via an access node. Where the registration request is rejected, a registration rejection message is communicated in response. The registration request message and/or the registration rejection message includes the identifier for each of one or more tracking areas to which the respective message applies.

The present application relates to devices and components including apparatus, systems, and methods for ephemeris signaling in wireless networks.

Methods, systems, and devices for wireless communications are described. The method includes receiving, from a first base station, control signaling indicating one or more frequency bands on which one or more neighbor base stations operate that are associated with a first geographic location of the first base station, performing, based on the control signaling, a frequency scanning procedure using at least one frequency band of the one or more frequency bands to select a first neighbor base station of the one or more neighbor base stations, and establishing connectivity with the first neighbor base station based on the frequency scanning procedure.