A handover method, a device, and a system to ensure that after an access and mobility management function (AMF) entity determines to no longer serve some terminals, a current ongoing procedure of a terminal in these terminals is not interrupted. The method includes: receiving, by a target mobility management entity, a message related to a target terminal; and sending, by the target mobility management entity, the message related to the target terminal to a source mobility management entity that currently serves the target terminal.

Systems and methods of protecting an initial NAS message are described. The NAS message is encrypted using the home PLMN public key during initial registration with the network using a registration request message. An AMF of the serving PLMN sends a serving PLMN public key which is then used to encrypt information including an S-NSSAI of later initial NAS messages after initial registration is completed. The S-NSSAI may not be sent in the later initial NAS message if the S-NSSAI is provided at an access stratum level. The RRC message may contain an indication that the S-NSSAI is encrypted using the serving PLMN public key.

The present specification proposes a method and a device for transmitting or receiving information in a wireless communication system supporting network slicing. Specifically, a method for transmitting a registration request message for a network by a terminal (user equipment (UE)) in a wireless communication system may comprise the steps of: receiving network slice selection assistance information (NSSAI) for the network, wherein the NSSAI includes at least one of first NSSAI set for the network, second NSSAI allowed to the network, and/or third NSSAI set for the terminal; generating a registration request message on the basis of the NSSAI; and transmitting the registration request message to the network, wherein the registration request message is generated on the basis of a third NSSAI value and/or whether the third NSSAI is included in the NSSAI.

A method and system for content filtering. A network repository function unit registers a session management function unit. The session management function unit initiates a session in response to a session request from a user equipment. The session management function unit accesses a subscriber profile stored by a data management unit, and the subscriber profile includes one or more content filtering settings. In response to the session being established, the session management function unit is configured to determine data packets for the user equipment to be filtered based on the one or more content filtering settings. Absent triggering an instruction to be sent via a Gx interface, an access and mobility management function (AMF) unit is configured to select the session management function unit in compliance with the one or more content filtering settings for filtering the data packets for the user equipment.

A wireless communication network serves a wireless User Equipment (UE). The wireless UE exchanges user data over a data session of a Dynamic Network Name (DNN) while exchanging other user data over other data sessions of other DNNs. An Access and Mobility Management Function (AMF) receives a DNN message for the wireless UE and the DNN and responsively transfers a reattach message for the data session of the DNN to the wireless UE. The wireless UE receives the reattach message and responsively terminates the data session of the DNN and transfers a session message for the DNN to the AMF. The AMF receives the session message for the DNN and the wireless UE and responsively establishes a new data session for the DNN. The wireless UE exchanges new user data over the new data session of the DNN while exchanging additional user data over the other data sessions of the other DNNs.

Methods by which User Plane (UP) management information is exchanged between an Application Function (AF) supporting one or more applications and a Slice Management Function (SMF) configured to manage traffic flows in a given slice of the network. The exchange of UP management information may be initiated from either the AF or the SMF. In the case of AF-initiated information exchange, the UP management information provided by the AF may comprise traffic requirements of applications supported by the AF. In the case of SMF-initiated information exchange, the UP management information provided by the SM may comprise operator policy information or events, and the AF may respond with information of traffic requirements of applications supported by the AF.

A communication scheme and system converges a 5G communication system supporting a data rate higher than that of a 4G system with an internet of things (IoT) technology. Applicable to intelligent services (e.g., smart homes, smart buildings, smart cities, smart cars, connected cars, health care, digital education, retails, and security and safety-related services), the communication scheme and system is based on the 5G communication technology and the IoT-related technology. Methods of operation a terminal and a network for facilitating a 5G terminal registration procedure in a wireless communication system are disclosed.

The present disclosure relates to a communication technique for merging IoT technology with a 5G communication system for supporting a data transmission rate higher than that of a 4G system, and a system therefor. The present disclosure can be applied to intelligent services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail businesses, security- and safety-related services, and the like) on the basis of 5G communication technology and IoT-related technology. The present disclosure provides a method and a device for efficiently providing and managing a network slice for a terminal service.

The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). A method by which an access network (AN) node of a wireless communication system manages a session by using backhaul information, according to one embodiment of the present disclosure, may comprise the steps of: selecting an access and mobility management function (AMF) when a registration request message is received from a user equipment (UE); selecting one transport network layer association (TNLA) from among candidate TNLAs for the selected AMF by considering the type of backhaul network of a control plane; transmitting an initial UE message to the selected AMF by using the selected TNLA; and performing a registration procedure of the UE when a selected TNLA response signal is received from the selected AMF, wherein the candidate TNLA can include a low earth orbit (LEO) and/or a geosynchronous earth orbit (GEP).

This disclosure generally relates performing UE authentication and registration with the core network, and in particular, to supporting secure interactions between the UE and the target AMF when the UE is re-allocated to the target AMF from an initial AMF. The Access Network element stores a candidate AMF list, and optionally, the original Registration Request message from the UE. The initial AMF, once determines an AMF re-allocation is needed, instruct the UE to re-start the registration procedure with the core network according to the stored candidate AMF list. With the solutions provided in this disclosure, the message interactions between the UE and the target AMF are integrity protected, without the need to upgrade the UE and without using an indirect connection of the core network.