Abstract: Embodiments of this application disclose a request processing method and a corresponding entity, to control a data notification and signaling that is used for triggering paging, thereby avoiding overload of a network element in a core network. The request processing method includes: determining, by an AMF, a first control plane function entity for a terminal device; determining, by the AMF, that the terminal device enters an idle state; obtaining, by the AMF, a first reachability service invocation request from the first control plane function entity; and rejecting, by the AMF, the first reachability service invocation request when the AMF determines, based on the first reachability service invocation request, that a reachability service invocation limitation condition is satisfied.

Abstract: Example communication methods and communications apparatuses are provided which verify a user equipment route selection policy (URSP) used by a terminal apparatus. The communication method includes obtaining information about a first application of at least one packet data unit (PDU) session, where the information about the first application is determined based on a first URSP. The information about the first application is sent to a second network element, where the information about the first application is used to verify whether information about a second application of the at least one PDU session matches the information about the first application, where the information about the second application is information about an application to which a data packet in the at least one PDU session belongs.

Abstract: In a communication method, a first access network device sends first information to a second access network device, where the first information is used to indicate that the first access network device has notified a core network device that a quality of service requirement of at least one quality of service flow cannot be met; the second access network device may send second information to the core network device, where the second information is used to notify the core network device that a quality of service requirement of a first quality of service flow in the at least one quality of service flow can be met, and the first quality of service flow is a quality of service flow that has been handed over from the first access network device to the second access network device.

Abstract: A method includes: receiving, by a session management function (SMF), first information from an access and mobility management function (AMF); obtaining, by the SMF, protocol data unit (PDU) session management subscription information from a unified data management (UDM) module; and when dynamic policy and charging control (PCC) is not deployed, establishing, by the SMF based on the first information and at least one of the PDU session management subscription information or local PDU session policy information of the SMF, a default guaranteed bit rate (GBR) quality of service (QoS) flow in the PDU session.

Abstract: A discovery method for a domain name system (DNS) server includes transmitting a DNS query to a local protocol data unit session anchor (L-PSA). The DNS query carries an IP address of a first DNS server edge application server discovery function (EASDF). The method includes, in accordance with a determination that the first DNS server EASDF satisfies an unavailability condition, transmitting a first dynamic host configuration protocol (DHCP) request to a session management function (SMF). The first DHCP request is used for obtaining an IP address of a second DNS server. The method includes receiving a first DHCP response carrying an IP address of the second DNS server assigned by the SMF.

Abstract: The present disclosure provides a method for implementing communication continuity at a computer device acting as an application function (AF) device corresponding to user equipment (UE), the UE establishing a wireless connection to a source application server (AS) using allocated UE source network address information. The method includes: determining a data service migration from the source AS to a target AS; transmitting a network address translation (NAT) parameter to a session management function (SMF), so that the SMF determines a target user plane function (UPF)/protocol data unit (PDU) session anchor (PSA) for performing NAT translation on a received data packet according to the NAT parameter; and configuring a third NAT parameter for the target AS according to the NAT parameter, and migrating the data service from the source AS to the target AS, so that the target AS performs NAT translation on the data packet according to the third NAT parameter.

Abstract: When an EBI needs to be assigned to an EPS bearer to which a QoS flow is mapped in an EPS, whether user plane security enforcement information of a PDU session matches user plane encryption protection information of the EPS is determined, that is, whether a user plane capability of the EPS can meet a user plane security requirement of the PDU session is determined. The EBI is assigned to the EPS bearer only when the requirement is met. Otherwise, the EBI is not assigned to the EPS bearer or the EBI is released if the EBI has been assigned. In this way, when UE moves from a 5GS to the EPS, the EPS bearer is prevented from using an EBI that does not meet the user plane security requirement for data transmission.

Abstract: A method for sending an end marker, a device, and a system, where the method includes receiving, by a source access node (AN) through a source path between the source AN and a core-network user-plane device, a first end marker sent by the core-network user-plane device. The method further includes generating, by the source AN, N second end marker(s) based on the first end marker, where N is a number of source data radio bearers (DRBs) corresponding to the source path, and sending, by the source AN, the N second end marker(s) to a target AN through a forwarding path corresponding to the source path.

Abstract: This application provides a communication method, a network element, a terminal apparatus, and a system. The communication method includes: receiving, by a first network element, first indication information from a second network element, where the first indication information is used to indicate that a current condition supports establishment of a session of a first network for a terminal apparatus; obtaining, by the first network element, first quality of service QoS control information of a first session of the terminal apparatus after receiving the first indication information, where the first session is a session established by the terminal apparatus by using a second network; and sending, by the first network element, the first QoS control information to the second network element. The communication method in the embodiments of this application can improve communication efficiency.

Abstract: In a communication method, a first access network device sends first information to a second access network device, where the first information is used to indicate that the first access network device has notified a core network device that a quality of service requirement of at least one quality of service flow cannot be met; the second access network device may send second information to the core network device, where the second information is used to notify the core network device that a quality of service requirement of a first quality of service flow in the at least one quality of service flow can be met, and the first quality of service flow is a quality of service flow that has been handed over from the first access network device to the second access network device.

Abstract: This application provides a QoS flow control method and an apparatus. An SMF network element receives first indication information sent by an access network apparatus, where the first indication information is used to indicate that a first QoS target of a QoS flow cannot be met; and the SMF network element does not process the QoS flow if the SMF network element receives second indication information in a first preset time; or the SMF network element deletes or modifies the QoS flow if the SMF network element does not receive second indication information in a first preset time, where the second indication information is used to indicate that the first QoS target can be met.

Abstract: In a method for configuring a policy for user equipment (UE), a PCF network element receives policy information of the UE from a first network element. The policy information of the UE indicates a current policy of the UE. The PCF network element sends configuration information to the UE based on the policy information of the UE, and the configuration information instructs the UE to update the policy of the UE. The policy control function network apparatus then sends to the first network apparatus update information that comprises either the configuration information or an identifier of the configuration information.

Abstract: Disclosed are a communication method and apparatus based on edge computing, a computer storage medium, and an electronic device. The communication method based on edge computing includes: receiving an uplink Internet Protocol (IP) packet transmitted by a user equipment, a destination address of the uplink IP packet being a network address of a target application server; determining a network address of a local edge server that is configured to respond to the uplink IP packet according to the network address of the target application server; and modifying the destination address of the uplink IP packet to the network address of the local edge server, and forwarding the modified uplink IP packet to the local edge server for processing.

Abstract: A method includes: receiving, by a session management function (SMF), a first identifier transmitted by user equipment (UE) in a protocol data unit (PDU) session establishment process (320); selecting a first edge application server discovery function (EASDF) for the UE according to the first identifier (340); and transmitting address information of the first EASDF to the UE (360).

Abstract: A method for implementing handover of a multicast broadcast service includes: receiving a handover complete indication transmitted by a target base station, the handover complete indication being used for indicating that a user equipment has been handed over to the target base station; and triggering establishment of a PDU session on a target base station side in response to a determination that the target base station does not support the MBS, S-NSSAI of the PDU session being the same as S-NSSAI of the activated MBS session, and a DNN of the PDU session being the same as a DNN of the activated MBS session, so that a quality of service flow corresponding to the activated MBS session is established in the PDU session, and there being one or more quality of service flows.

Abstract: A method includes: transmitting, by a session management function (SMF), a packet detection rule (PDR) and a quality of service (QoS) enforcement rule (QER) to a user plane function (UPF), the PDR being used for identifying a target packet transmitted by a terminal, and the QER being used for limiting transmission of the target packet, where the target packet is a packet that triggers a target core network element to initiate the DoS attack to the SMF.

Abstract: A discovery method for a domain name system (DNS) server includes transmitting a DNS query to a local protocol data unit session anchor (L-PSA). The DNS query carries an IP address of a first DNS server edge application server discovery function (EASDF). The method includes, in accordance with a determination that the first DNS server EASDF satisfies an unavailability condition, transmitting a first dynamic host configuration protocol (DHCP) request to a session management function (SMF). The first DHCP request is used for obtaining an IP address of a second DNS server. The method includes receiving a first DHCP response carrying an IP address of the second DNS server assigned by the SMF.

Abstract: This application provide a communication method for a multicast and broadcast service (MBS) performed by an electronic device. The method includes: receiving a data management creation/update request transmitted by a network exposure function, the request including a data set identifier used for indicating a user equipment policy, a data subset identifier used for indicating that a data type is an MBS service, a data keyword used for indicating a multicast/broadcast address, a data sub-keyword used for indicating network slice information and a data network name or used for indicating an MBS session identifier, and a data set used for indicating MBS service data; transmitting a DM creation/update response to the NEF; and transmitting a DM notification request to a policy control function, the DM notification request being used for causing the PCF to transmit, to the UE, policy information of which a UE policy type is an MBS service.

Abstract: A method for implementing multicast broadcast service handover includes: acquiring a PDU session associated with an MBS session, S-NSSAI of the PDU session being the same as S-NSSAI of the MBS session, a DNN of the PDU session being the same as a DNN of the MBS session; acquiring an MBS session identity of the MBS session; acquiring policy rule information corresponding to the activated MBS session from a PCF according to the MBS session identity, one or more pieces of policy rule information being provided; and establishing a quality of service flow corresponding to the activated MBS session on the PDU session according to the policy rule information corresponding to the activated MBS session, one or more quality of service flows being provided.

Abstract: The present disclosure relates to session information management methods. One example method includes sending, by a session management function (SMF) network element, identification information of a terminal device, a data network name (DNN), and slice information to a data management network element to request first subscription data that is of the terminal device and that is associated with the DNN and the slice information, where the slice information is used to identify a network slice served by the SMF network element, and receiving, by the SMF network element, the first subscription data from the data management network element.