Abstract: A session management function (SMF) receives a message from a network exposure function (NEF). The message comprises downlink data and a release assistance indicator (RAI). The RAI indicates that transmission of uplink data by a wireless device is expected subsequent to transmission of the downlink data. The RAI indicates a release of a connection associated with the wireless device after the transmission of uplink data. The SMF receives an indication that the uplink data is transmitted. The SMF upon receiving the indication, sends a release message to an access and mobility management function (AMF). The release message indicates release of a non-access stratum message associated with the wireless device. The release message comprises the release assistance indicator.

Abstract: A wireless device sends a PDU session establishment request message to an access and mobility management function (AMF). The PDU session establishment request message requests establishment of a packet data unit (PDU) session for an always-on PDU session. The wireless device receives a first message from the AMF. The first message indicates at least one service associated with the always-on PDU session. The wireless device sends at least one packet of an at least one allowed service of the at least one service via the always-on PDU session.

Abstract: An access and mobility management function (AMF) receives, from a network function, an event exposure subscribe message requesting to notify a change of closed access group (CAG) area of a wireless device. The AMF sends, to a base station, a location reporting control message requesting to notify the change of the CAG area of the wireless device. The location reporting control message comprises a list of CAG identifiers. The AMF receives, from a second base station, a location report message notifying the change of the CAG area. The AMF sends, to the network function, an event exposure notify message indicating the change of the CAG area.

Abstract: A wireless device sends to an access and mobility management function (AMF), a message comprising a time sensitive networking (TSN) bridge capability support parameter that indicates that the wireless device supports a TSN bridge functionality. The wireless device receives, from the AMF and based on the TSN bridge capability support parameter, a configuration update message comprising at least one route configuration rule. The wireless device sends, to the AMF, a request to establish a protocol data unit (PDU) session, the request comprising one or more configuration parameters determined based on the at least one route configuration rule.

Abstract: A wireless device sends a first request to a mobility management function. The first request includes a paging cause value in a paging message. The paging message is received by the wireless device and comprises the paging cause value. Based on the paging message, a second request for a connection setup is sent.

Abstract: A method of an access and mobility function (AMF) for state management in a wireless communication system is provided. The method comprises determining a state of at least one state machine, receiving, from a target access network (AN), an N2 path switch request message based on the state of the at least one state machine, transmitting, to a session management function (SMF), an N11 message, and transmitting, to the target AN, an N2 path switch request acknowledgement (Ack) message when receiving an N11 Ack message, from the SMF, corresponding to the N11 message, wherein the target AN transmits a release resource message to a source AN when the target AN receives the N2 path switch request Ack message.

Abstract: A session management function (SMF) receives, from an access and mobility management function (AMF), a first request message. The first request message is for a time sensitive network (TSN) bridge. The SMF selects, based on the first request message, a user plane function (UPF) that supports TSN functionality. The SMF sends, to the UPF, a second request message to configure the UPF for the TSN bridge. The second request message comprises an identifier of the TSN bridge. The second request message comprises an identifier of a port associated with TSN packet transmission.

Abstract: A core network includes a home network and a visiting network. The home network includes a first slice selector module configured to select a first slice and a first network function selection module configured to select a network function within the first slice. The visiting network includes a second slice selector module configured to communicate with the first slice selector and select a second slice, a second network function selection module configured to select a network function within the second slice, and a common core network function (CCNF) module. The CCNF module communicates with the second slice selector module to receive an identity of the first slice and an identity of the second slice, assign a temporary identifier, and transmit the temporary identifier to a user equipment.

Abstract: A policy control function (PCF) receives a first message from an application function (AF). The first message comprises: an always-on PDU session requested indication; an identity of a wireless device; and application service information. The PCF maps, based on the first message, the application service information to an always-on PDU Session for the wireless device. The PCF sends to a session management function (SMF), at least one policy and charging rule for the always-on PDU Session.

Abstract: A charging function (CHF) receives, from a policy control function (PCF), a first request for charging policy information for a packet data unit (PDU) session of a wireless device. The charging policy information is determined for the PDU session of the wireless device. The charging policy information indicates a charging method comprising one or more of: online charging; offline charging; and converged charging. A message comprising the charging policy information is sent to the PCF. The CHF receives from a session management function (SMF), a second request to establish a charging session. The second request comprises the charging method. A confirmation for the charging method is sent to the SMF.

Abstract: A session management function (SMF) receives from a wireless device, a packet data unit (PDU) session establishment request message. The SMF sends to a network node, a request message for subscription information of the wireless device. The SMF receives from the network node, a response message comprising subscription information indicating an identifier of a first local proxy application server for an application location, wherein the application location identifies a user plane access to a data network. The SMF sends to the wireless device, a PDU session establishment accept message comprising the identifier of the first local proxy application server.

Abstract: A wireless cellular network system comprising MME configured to send a first create session request to SGW-C, the SGW-C configured to select SGW-U and transmit a first resource request to the selected SGW-U, and the SGW-U configured to, upon a receipt of the first resource request, allocate an IP address and TEIDs of the SGW-U, and transmit a resource message including the IP address and the TEIDs of the SGW-U to SGW-C. A method of SGW-C in a wireless communication system, the method comprising receiving, from MME, a first create session request, selecting SGW-U among a plurality of SGW-Us, wherein the selection is based on a location of a terminal, transmitting a first resource request to the selected SGW-U, receiving, from the selected SGW-U, a resource message including an IP address and TEID of the SGW-U, the IP address and TEIDs being allocated by the selected SGW-U.

Abstract: A session management function (SMF) receives a request message from a network exposure function (NEF). The request message is for a delivery of a trigger to a wireless device. The request message includes a trigger payload and a trigger indication. The trigger payload includes information for an application on the wireless device. The trigger indication identifies that the request message carries the trigger payload. The SMF sends, via an access and mobility management function (AMF), a non-access stratum (NAS) message to the wireless device. The NAS message includes the trigger indication and the trigger payload. The SMF receives, from the wireless device via the AMF and based on the trigger payload, a request to establish a packet data unit session for the application.

Abstract: A method of an access and mobility function (AMF) for state management in a wireless communication system is provided. The method comprises determining a state of at least one state machine, receiving, from a target access network (AN), an N2 path switch request message based on the state of the at least one state machine, transmitting, to a session management function (SMF), an N11 message, and transmitting, to the target AN, an N2 path switch request acknowledgement (Ack) message when receiving an N11 Ack message, from the SMF, corresponding to the N11 message, wherein the target AN transmits a release resource message to a source AN when the target AN receives the N2 path switch request Ack message.

Abstract: A home session management function (SMF) of a home public land mobile network (PLMN) receives, from a visited SMF of a visited PLMN from a visited SMF of a visited PLMN, a request for creation of a packet data unit (PDU) session of a wireless device. The request comprises first charging policy information determined based on a first policy of the visited PLMN. The home SMF sends, to the visited SMF and based on the request, a second charging policy information comprising: a charging method for the PDU session; and a charging parameter indicating a charging level for the PDU session.

Abstract: A session management function (SMF) receives, from an access and mobility management function (AMF), a first request message. The first request message is for a time sensitive network (TSN) bridge. The SMF selects, based on the first request message, a user plane function (UPF) that supports TSN functionality. The SMF sends, to the UPF, a second request message to configure the UPF for the TSN bridge. The second request message comprises an identifier of the TSN bridge. The second request message comprises an identifier of a port associated with TSN packet transmission.

Abstract: A session management function sends, to a policy control function, a policy request message. The policy request message comprises a non-public network identifier of a non-public network through which a wireless device accesses a public land mobile network. The policy request message comprises an identifier of the public land mobile network. The session management function receives, from the policy control function, a policy response message comprising a charging control policy.

Abstract: A PCF receives from an SMF, a policy establishment request message requesting a charging control rule for a PDU session of a wireless device. In response to the policy establishment request message, the PCF sends to a CHF a charging policy request message requesting charging policy information for the PDU session. The PCF receives from the CHF a charging policy response message. The charging policy response message comprises the charging policy information. The charging policy information comprises a first charging method. Based on the charging policy information, the PCF determines a charging control rule for the PDU session. The PCF sends to the SMF a policy establishment response message comprising the charging control rule. The SMF enforces the charging control rule.

Abstract: A home SMF of a home PLMN receives a first message from a visited SMF of visited PLMN. The first message requests creation of a packet data unit (PDU) session of a wireless device. The first message comprises first charging policy information determined based on a first policy of the visited PLMN. The home SMF determines a second charging policy information for the PDU session based on the first charging policy information and a second policy of the home PLMN. The second charging policy information comprises: a charging method for the PDU session, and a charging parameter indicating a charging level for the PDU session. The home SMF sends a second message to the visited SMF. The second message comprises the second charging policy information.

Abstract: A second base station receives, from a first base station, a radio access network (RAN) paging message for a wireless device. The RAN paging message comprises a parameter indicating whether the wireless device is allowed to access a non-closed access group (CAG) cell. The second base station sends a second paging message via a cell determined based on the cell being the non-CAG cell and the parameter indicating that the wireless device is allowed to access a non-CAG cell.