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.

Abstract: Method and an apparatus for determining a bearer for mobile edge computing are disclosed. A Mobile Edge Computing (MEC) can obtain a data packet that includes an end marker. The MEC can obtain a bearer identifier and an identifier of UE in a handover procedure according to the data packet that includes the end maker, and requests information about the second bearer from a node of a second bearer. The request can include the bearer identifier of the UE and the identifier of the UE. The node of the second bearer can return a response message and information regarding the second bearer according to the request. The MEC can receive the response message and store the information regarding the second bearer according to the identifier of the UE and the bearer identifier of the UE.

Abstract: A data routing method and apparatus resolve a problem that data packet forwarding efficiency is greatly reduced because a service function instance sequence needs to be retrieved for each data packet according to a 5-tuple of a data flow to which the data packet belongs. The data routing method includes: receiving, by a traffic classifier, a data packet, where the data packet belongs to a first data flow; allocating, by the traffic classifier, a first data route identifier to the first data flow, where the first data route identifier is used to identify a service function chain of the first data flow and is used to identify the first data flow; adding, by the traffic classifier, the first data route identifier to the data packet; and sending, by the traffic classifier, the data packet to a service function forwarding device.

Abstract: Embodiments of this application relate to a multipath data transmission processing method and a network device. A first network device receives a packet from a first host device, and determines a first connection identifier between the first network device and a second network device based on the packet. The first network device encapsulates the packet based on the first connection identifier. The first network device sends the encapsulated packet to the second network device through one of a plurality of subflows between the first network device and the second network device. According to the embodiments of this application, multipath data transmission is implemented, a data transmission rate is increased, and a host device does not perceive a plurality of paths. The embodiments of this application can be applied to any existing communications system.

Abstract: A method and an apparatus for deleting a session context are provided, to resolve a technical problem of how to delete an SM context from an SMF after abnormal network disconnection. The method includes: receiving, by a session management function entity, a packet data unit PDU session release request; and deleting, by the session management function entity based on the PDU session release request, a PDU session context that is stored in the session management function entity and that is of a terminal, where the PDU session context is a PDU session context that is not deleted after the terminal is abnormally deregistered.

Abstract: A service discovery method, a registration center, and a device, where the method includes: receiving, by a registration center, a service discovery request sent by a first device, where the service discovery request carries target parameter information of a service needed by the first device, and where the target parameter information includes at least one of information about a first transmission mode, information about an invocation mode, information about a transmission protocol, or information about a second transmission mode; determining, by the registration center based on a service parameter database, a target service corresponding to the target parameter information, where the service parameter database is used to store parameter information of different services of a second device; and sending, by the registration center, a service response message to the first device, where the service response message includes description information of the target service.

Abstract: Embodiments of the present disclosure provide a GTP-U downlink packet sending method and apparatus. The method includes: receiving, by a MEC platform, a GTP-U uplink packet sent by a base station device; obtaining, by the MEC platform, a TEID of the base station device according to the GTP-U uplink packet; and sending, by the MEC platform, a GTP-U downlink packet to the base station device, where the GTP-U downlink packet includes the TEID of the base station device. By using the technical solutions of the embodiments of the present disclosure, after receiving the GTP-U uplink packet sent by the base station device, the MEC platform can obtain the TEID of the base station device according to the GTP-U uplink packet, and therefore, can correctly perform GTP-U encapsulation, and send the GTP-U downlink packet to the base station device.

Abstract: In an embodiment, a video stream synchronization request is sent to a network side device; a video stream playback position synchronization parameter sent by the network side device is received, where the video stream playback position synchronization parameter includes a playback position parameter at a video stream sending moment and a system frame number (SFN) at the video stream sending moment; an SFN at a video stream receiving moment is acquired; and the playback position parameter at the video stream sending moment is adjusted according to the SFN at the video stream sending moment and the SFN at the video stream receiving moment, so as to coincide with a current playback position parameter of the network side device.

Abstract: An information transmission method is provided. An apparatus receives a first session request from a third party application function, which includes identity information of the third party application function and identity information of a destination entity in a network. The apparatus establishes a first session with the third party application function; sends a second session request to the destination entity, which includes identity information of an anchor entity and the identity information of the third party application function. The apparatus establishes a second session with the destination entity; receives information reported by the destination entity, which includes a report event and identity information of the third party application function. The apparatus forwards the report event to the corresponding third party application function according to the identity information of the third party application function included in the information.

Abstract: This application provides a parameter determining method and a communications entity. The method includes: When UE is in a system in which an EPS network and a 5GS network interwork, the UE is currently located in the 5GS network, and used QoS parameters include an authorized UE AMBR and an authorized session AMBR of a session. Because of movement of the UE, the UE needs to be handed over to the EPS network, and QoS parameters that need to be used for the UE in the EPS network include an authorized UE AMBR and an authorized APN AMBR. The authorized APN AMBR is determined by a first communications entity based on at least one of a subscribed APN AMBR or the authorized session AMBR of the PDU session, and the authorized UE AMBR is determined by a second communications entity based on the authorized APN AMBR.

Abstract: The present application discloses an application migration method in a mobile edge system, a related device, and a system. The method performed by a mobile edge orchestrator includes: obtaining a working index set of a to-be-migrated application on a first mobile edge server, where the working index set includes a migration index set including at least one migration index; determining a target migration solution of the to-be-migrated application based on the working index set and a preset correspondence, which is a correspondence between a migration index set and a migration solution; and sending a migration instruction to a mobile edge platform manager, where the migration instruction carries the target migration solution, and the migration instruction is used to instruct the mobile edge platform manager to migrate, based on the target migration solution, the to-be-migrated application from the first mobile edge server to a second mobile edge server.

Abstract: Embodiments of the present invention provide an address management apparatus, system, and method for communication over the Multipath Transmission Control Protocol (MTCP). A processing module allocates a corresponding internet protocol (IP) address to each MPTCP session, where the MPTCP session is an MPTCP session between a first host and a second host, the first host is the host supporting MPTCP, and the second host is the host not supporting MPTCP, and when the MPTCP session is terminated, the processing module releases the corresponding IP address allocated to the MPTCP session. A transceiver module sets up the MPTCP session according to the IP address.

Abstract: Embodiments provide a location area management method, a control node, and user equipment (UE). The method is applied to a communications system including a control plane node, and the control plane node stores an upper-level area identity list of UE. The control plane node determines a lower-level area identity list of the UE based on the upper-level area identity list. The control plane node sends the lower-level area identity list to the UE. When the upper-level area identity list is allocated to the UE, the lower-level area identity list is allocated to the UE. The lower-level area identity list includes fewer areas than the upper-level area identity list, so that when the control plane node pages the UE, paging is performed in an area corresponding to the lower-level area identity list, thereby reducing signaling overheads of a network side device.

Abstract: The present disclosure relates to capability exposure implementation methods, systems, and devices. One example method includes a first device obtaining capability information of a radio access network device, configuring an API, setting a use time limit of the API, where the API is used to provide the capability information for a second device, triggering a registration function to send registration information to the second device, where the registration information includes an identifier of the API, receiving an API request sent by the second device, where the API request includes the identifier of the API, detecting whether the use time limit of the API expires, and if the use time limit of the API does not expire, sending an API response to the second device by using the API, where the API response includes the capability information.

Abstract: Embodiments of this application provide a data transmission method, including: receiving, by user equipment, a first message, where the first message is used to instruct the user equipment to activate a reflective quality of service RQ mechanism; generating, by the user equipment, an implicit quality of service implicit QoS rule according to the RQ mechanism; receiving, by the user equipment, a second message, where the second message is used to instruct the user equipment to stop using the RQ mechanism; and stopping, by the user equipment, using the RQ mechanism, and deleting the implicit QoS rule. The user equipment receives the second message indicating that using of the RQ mechanism needs to be stopped, and deletes the implicit QoS rule, so as to implement switching between an explicit QoS rule and the implicit QoS rule, and flexibly configure a QoS rule for uplink data according to a policy of an operator.

Abstract: The present invention provides an apparatus, a system, and a method for preventing TCP connection interruption. The apparatus determines that user equipment UE needs cell handover; and the apparatus sends a first instruction message to a server, where the first instruction message is used to instruct the server to stop sending downlink data to the proxy device, and sends cached downlink data to the UE. Therefore, the following problem is avoided: After UE is disconnected from a source cell and is connected to a new cell, because the UE does not receive partial downlink data cached by a TCP proxy or because partial cached data is lost, the UE initiates retransmission to a server, but the server does not retransmit an acknowledged packet according to a TCP protocol, causing TCP connection interruption and service interruption.

Abstract: A control method and apparatus for load transmission is provided. The control method includes: receiving a trigger event reported by a proxy server, where the trigger event includes a first transmission delay of a first member transmission path and a second transmission delay of a second member transmission path, and reporting the trigger event when one of the first and the second transmission delays is greater than a first delay threshold, The method also includes initiating a request to a packet data network gateway and obtaining network information fed back by the packet data network gateway. The method also includes controlling, according to the first transmission delay, the second transmission delay, and the network information, the proxy server to perform corresponding load distribution.

Abstract: Embodiments of the present invention relate to the communications field, and provide an MEC platform handover method, apparatus, and system. The method includes: receiving a handover notification sent by a handover notification device, where the handover notification device is a source access network device of to-be-handed-over UE or a target MEC platform of the to-be-handed-over UE; determining a TEID of the to-be-handed-over UE according to the handover notification; obtaining context of the to-be-handed-over UE according to the TEID of the to-be-handed-over UE; and sending the context to the target MEC platform. The present invention resolves a problem that provision of application data by an MEC platform to UE is interrupted when the UE is being handed over between access network devices, thereby providing continuous services to the UE. The present invention is applicable to a handover between MEC platforms.

Abstract: A QoS control method and a device are disclosed. In the method, a session management function SMF entity obtains service data flow SDF-level QoS control information; the SMF entity sends the SDF-level QoS control information to a terminal; and the terminal performs QoS control on an uplink data packet based on the SDF-level QoS control information, or deletes the SDF-level QoS control information. In the foregoing method embodiments, the terminal can perform the QoS control on the uplink data packet based on the SDF-level QoS control information.

Abstract: A method for sending an end marker, a device, and a system, where the method includes receiving, by a source 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 the number of source DRB(s) 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. According to the method, when a DRB is unknown to a core network, a target AN can accurately obtain a DRB-based end marker. This ensures correct sorting of downlink data of UE on a target DRB in a handover scenario.