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: A wireless transmit/receive unit (WTRU) may establish one or more protocol data unit (PDU) sessions via a radio access network (RAN) node. The WTRU may transition to an inactive state. The WTRU may send a connection resume message to a RAN node that indicates a request to resume the established plurality of PDU sessions via the RAN node. The WTRU may receive a message from the RAN node. For example, the RAN node may send a message indicating a subset of the plurality of PDU sessions that are available upon resuming a connection with the RAN node. The WTRU may deactivate at least one established PDU session of the plurality of PDU sessions based on the received message from the RAN node that indicates at least one established PDU session not being included in the subset of the plurality of PDU sessions that are available.

Abstract: A method and device for controlling sending of a general data transfer platform (GTP) message, and a data sending method and device are provided. A GTP message sending device receives a no-response time indication of user equipment sent from a GTP message response device, where the no-response time indication indicates a no-response time of the user equipment in an implicit or explicit manner, the GTP message sending device adjusts, according to the no-response time of the user equipment indicated by the received no-response time indication of the user equipment, a time of sending a GTP message, where adjusting the time of sending the GTP message is specifically postponing the time of sending the GTP message as the no-response time of the user equipment increases, or bringing forward the time of sending the GTP message as the no-response time of the user equipment decreases.

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 this application provide a downlink data transmission method and apparatus. The method includes: receiving, by a user plane device, downlink data of a terminal, sending, by the user plane device, the downlink data by using a shared bearer to an access network device that is in a tracking area of the terminal, receiving, by the access network device, a context setup request message sent by a control plane device, setting up, by the access network device, a radio bearer between the access network device and the terminal based on the context setup request message, and sending, by the access network device, the downlink data to the terminal by using the radio bearer. In this way, a downlink data transmission delay is reduced and downlink data transmission efficiency is improved.

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 the present invention provide a failure handling method, a packet data network, a mobility management entity, and a network system. The failure handling method includes: receiving, by a packet data network gateway P-GW, downlink data after detecting that a failure occurs in an associated first S-GW; and sending, by the P-GW, a notification message to a mobility management entity MME by using a second S-GW, where the notification message includes an identifier of the P-GW and an identifier of a user, so that when determining that the identifier of the P-GW included in the notification message is different from a P-GW identifier corresponding to a context identifier of the user, the MME refuses to initiate a procedure for recovering from the failure in the first S-GW. The embodiments of the present invention can prevent a failure recovery procedure from being executed multiple times, and lighten signaling load.

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 mobility management apparatus reselection method and a mobility management apparatus are provided. The method includes: receiving an access request message sent from user equipment (UE), where the access request message carries identity information of the UE; determining, according to the identity information of the UE, a type of a mobility management apparatus that the UE needs to access; reselecting a second mobility management apparatus according to the type of the mobility management apparatus that the UE needs to access; and forwarding the access request message to the second mobility management apparatus, so that the second mobility management apparatus executes an access request procedure of the UE. The embodiments of the present invention is applicable to the field of communications technologies.

Abstract: The present application relates to a data migration method and an apparatus, which are applied to a scenario in which a user plane gateway communicating with a terminal is changed from a source user plane gateway to a target user plane gateway. The target user plane gateway receives an address of the terminal from a control plane gateway, obtains an Ethernet data packet based on the address of the terminal, and sends the Ethernet data packet to an Ethernet interface, so that a switch obtains the Ethernet data packet through the Ethernet interface, and updates a MAC address table based on the Ethernet data packet. Thus, the switch updates the MAC address table in a timely manner, and the switch can send, through a correct port based on an updated MAC address table, downlink data to the terminal, to effectively prevent a loss of the downlink data.

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: The present invention is applicable to the field of communications and provides a session establishment method and apparatus. The method includes: acquiring an infrastructure virtual circuit IVC corresponding to a user equipment UE; sending a virtual local area network VLAN label corresponding to the IVC to a customer location function set, so that the customer location function set adds the VLAN label to a packet of the UE, where the VLAN label is configured by an L2 session control functional entity for the IVC; and notifying an L2 forwarding functional entity of the VLAN label, so that the L2 forwarding functional entity forwards, to the IVC, the packet sent by the customer location function set and added with the VLAN label. In the present invention, a case in which the L2 forwarding functional entity needs to store a large MAC table is avoided, and packet forwarding efficiency is improved.

Abstract: Embodiments of the present invention disclose a method and device for controlling sending of a GTP message, and a data sending method and device. A GTP message sending device receives a no-response time indication of user equipment sent from a GTP message response device, where the no-response time indication indicates a no-response time of the user equipment in an implicit or explicit manner, the GTP message sending device adjusts, according to the no-response time of the user equipment indicated by the received no-response time indication of the user equipment, a time of sending a GTP message, where adjusting the time of sending the GTP message is specifically postponing the time of sending the GTP message as the no-response time of the user equipment increases, or bringing forward the time of sending the GTP message as the no-response time of the user equipment decreases.

Abstract: Embodiments of the present invention disclose a bearer handover control device and control method. The method includes: receiving, by a network side device, a bearer handover message; and determining, by the network side device according to the bearer handover message, a bearer needing to be handed over in all bearers, so that an end marker End Marker message is sent to a source base station only for the bearer needing to be handed over. By using the foregoing solutions, for a multi-connection scenario, a network side device can determine a bearer needing to be handed over, so that an end marker message is sent only for the bearer needing to be handed over, which can prevent discarding of subsequent data of a bearer that is not to be handed over, and ensure multiple connections between a UE and base stations, thereby improving stability of a system.

Abstract: A mobility management apparatus reselection method and a mobility management apparatus are provided. The method includes: receiving an access request message sent from user equipment (UE), where the access request message carries identity information of the UE; determining, according to the identity information of the UE, a type of a mobility management apparatus that the UE needs to access; reselecting a second mobility management apparatus according to the type of the mobility management apparatus that the UE needs to access; and forwarding the access request message to the second mobility management apparatus, so that the second mobility management apparatus executes an access request procedure of the UE. The embodiments of the present invention is applicable to the field of communications technologies.

Abstract: A capability exposure implementation method and system, and a related device are provided. A method embodiment of the present disclosure includes: obtaining capability information of a radio access network device, configuring an API, and setting a use time limit of the API, where the API is used to provide the capability information for a second mobile edge platform; triggering a registration function to send registration information to the second mobile edge platform, where the registration information includes an identifier of the API; receiving an API request sent by the second mobile edge platform, 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 mobile edge platform by using the API, where the API response includes the capability information.

Abstract: A method for saving power of UE and a device. The method includes, when determining that downlink data to be sent to UE exists and that the UE is in a power saving mode, recording an event that the downlink data to be sent to the UE exists when the user equipment (UE) is in a power saving mode; and sending, when receiving a tracking area update (TAU) request initiated by the UE, an indication message to the UE, where the indication message is used to indicate that the downlink data to be sent to the UE exists when the UE is in a power saving mode so that the UE obtains the downlink data after setting up a data bearer.

Abstract: A method and a system are disclosed for providing session continuity in a 5G system. A wireless transmit receive unit (WTRU) may receive, from a session management function (SMF), a first Non-Access Stratum (NAS) message indicating a Packet Data Unit (PDU) session re-establishment. Upon receiving the first NAS message, the WTRU may determine an old PDU session ID based on the NAS message and generate a new PDU session ID. The WTRU may transmit a second NAS message indicating a PDU session establishment request. The second NAS message may include the old and new PDU session IDs. Upon receiving the PDU session establishment request, the SMF may determine that the old PDU session ID is associated with an existing PDU session for which the PDU session re-establishment is requested. The SMF may also determine that the new PDU session ID is associated with a new PDU session to be established.

Abstract: Embodiments of the present invention disclose a method and device for controlling sending of a GTP message, and a data sending method and device. A GTP message sending device receives a no-response time indication of user equipment sent from a GTP message response device, where the no-response time indication indicates a no-response time of the user equipment in an implicit or explicit manner, the GTP message sending device adjusts, according to the no-response time of the user equipment indicated by the received no-response time indication of the user equipment, a time of sending a GTP message, where adjusting the time of sending the GTP message is specifically postponing the time of sending the GTP message as the no-response time of the user equipment increases, or bringing forward the time of sending the GTP message as the no-response time of the user equipment decreases.

Abstract: A wireless transmit/receive unit (WTRU) may establish one or more protocol data unit (PDU) sessions via a radio access network (RAN) node. The WTRU may transition to an inactive state. The WTRU may send a connection resume message to a RAN node that indicates a request to resume the established plurality of PDU sessions via the RAN node. The WTRU may receive a message from the RAN node. For example, the RAN node may send a message indicating a subset of the plurality of PDU sessions that are available upon resuming a connection with the RAN node. The WTRU may deactivate at least one established PDU session of the plurality of PDU sessions based on the received message from the RAN node that indicates at least one established PDU session not being included in the subset of the plurality of PDU sessions that are available.