Abstract: The present disclosure provides a method, device, and system for processing migration between dedicated core networks. The method includes: when a subscribed usage type of UE changes, obtaining, by a mobility management network element, the subscribed usage type of the UE; if dedicated core network assistance information of the UE does not match a dedicated core network served by the mobility management network element, sending a request message to the UE; and sending, to a serving base station of the UE, the dedicated core network assistance information in a radio resource control (RRC) connection establishment request message triggered by the access request message, so that the base station selects a dedicated core network corresponding to the dedicated core network assistance information for the UE.

Abstract: The present application provides a network service implementation method, a service controller, and a communications system. The method includes: receiving a service request message including a message identifier; determining, based on the service request message, a target service component corresponding to the message identifier; and determining a target service instance from at least one service instance of the target service component, and sending the service request message to the target service instance, so that the target service instance processes the service request message. The present application is used to improve efficiency in providing a network service.

Abstract: Embodiments of the present application provide a service node selection and query method, an apparatus, and a system. The method includes: receiving a request message sent by UE; obtaining a usage type and selection assistance information of the UE based on the request message, where the selection assistance information includes at least one of a dedicated network type or service attribute information; and then determining, based on the usage type and the selection assistance information that are obtained, a service node that serves the UE. The service node selected in this manner is a service node that supports the dedicated network type of the UE and can meet a service requested by the UE this time, so that service success of the UE can be ensured.

Abstract: The present application provides a method for accessing user context data by a network service component, an apparatus, and a system, so as to avoid incorrect access to user context data. The method includes: A user data management (UDM) service component receives a context data access request sent by a service component instance, and then sends a request for obtaining a context data access policy of a service component corresponding to the service component instance to a service registry. The service registry sends the context data access policy of the service component to the UDM service component, and the UDM service component performs a context data access operation according to the context data access request and the context data access policy.

Abstract: The present invention relates to the communications field, and in particular, to a message exchange method, a device, and a system. The method may include: receiving, by a core network device, a message, where the message carries a message identifier; obtaining, by the core network device, a service rule set, where a service rule in the service rule set includes the message identifier and a corresponding network function module identifier; determining, by the core network device, a corresponding target network function module identifier in the service rule set; and sending the message to a network function module of the corresponding target network function module identifier. The service rule in the service rule set may be changed.

Abstract: Embodiments of the present invention relate to the communications field, and provide a method for determining a control plane node, an apparatus, and a wireless communications system, so as to select, for UE, a control plane node corresponding to a network slice to which the UE belongs, thereby ensuring that the control plane node can provide a customized service for the UE. The method includes: obtaining, by UE, indication information, where the indication information is used to indicate a network slice to which the UE belongs; and sending, by the UE, an access layer request message to a radio access network node, where the access layer request message includes the indication information, and the access layer request message is used to trigger the radio access network node to determine, based on the indication information, a control plane node corresponding to the network slice for the UE.

Abstract: A method for reporting radio bearer loss information is provided in an embodiment of this invention. The method comprises: receiving a User Equipment UE Context Release Request message or a Release Access Bearer Request message or an Iu interface release request message all carrying a release cause value; and if the release cause value indicates an abnormal release, reporting radio bearer loss information to a gateway while preserving non-GBR bearers. With the method and apparatus of embodiments of this invention, not only bearer reporting can be realized, but also problems caused by the release of Non-Guaranteed Bandwidth non-GBR bearers can be prevented.

Abstract: The present invention discloses a congestion control method and apparatus. A priority of a DCN type supported by a core network is defined. When a DCN node is congested, congestion control may be first performed on a DCN type having a low priority. Therefore, access by UE of the DCN type having a low priority is prevented, and normal access by UE of a DCN type having a high priority can be ensured. In addition, it can be avoided that the DCN node monitors a load status of each supported DCN type, thereby reducing policy complexity of the DCN node. Furthermore, it is avoided that the DCN node is not congested but a particular type of DCN is congested, thereby improving resource usage.

Abstract: Embodiments of the present invention disclose a method, a network element, and a system for determining a target RAT. The method includes: receiving, by an access network element, access control information of a UE that is sent by a mobility management network element, where the access control information includes an identity of a PLMN and a radio access technology RAT allowed and/or a RAT not allowed by the PLMN; and determining, by the access network element, a target RAT for the UE according to the access control information. The present invention can be applied to a shared network environment.

Abstract: The present application discloses a DCN processing method for a PLMN that is applied to a network sharing scenario. An access feedback message of a network side is received, and selection assistance information of a DCN and an identifier of a PLMN that serves UE are obtained from the access feedback message, so as to know a PLMN that is actually accessed by the UE. A correspondence between the selection assistance information of the DCN and the identifier of the PLMN that serves the UE is stored. When the UE moves to coverage of the PLMN, a requested DCN to be accessed can be directly determined according to the correspondence, and a RAN node is requested to access the determined DCN. Therefore, a redirection process is reduced, and resource overheads are reduced.

Abstract: Embodiments of the present disclosure provide a method, a RAN node, and UE for selecting a service network, and a management device. The method includes: determining a service requirement list of the UE, where the service requirement list includes at least one service required by the UE; determining a service capability list set including a service capability list of at least one service network, where the service capability list includes an identifier of a service network corresponding to the service capability list and includes at least one service supported by the service network; and determining, according to the service requirement list and the service capability list set, a first identifier of a first service network that provides a service for the UE, where a service capability list of the first service network includes all or part of the at least one service in the service requirement list present disclosure.

Abstract: A method for reporting radio bearer loss information is provided. The method comprises: receiving a User Equipment UE Context Release Request message or a Release Access Bearer Request message or an Iu interface release request message all carrying a release cause value; and if the release cause value indicates an abnormal release, reporting radio bearer loss information to a gateway while preserving non-GBR bearers. With the method and apparatus of embodiments of this invention, not only bearer reporting can be realized, but also problems caused by the release of Non-Guaranteed Bandwidth non-GBR bearers can be prevented.

Abstract: Embodiments of the present invention disclose a method and an apparatus for sharing a core network, where the method includes: first, determining, by a mobility management network element, that a user equipment does not support network sharing; and then, sending, by the mobility management network element, a location update request message to a mobile switching center or visitor location register MSC/VLR, where the location update request message includes indication information that the user equipment does not support network sharing, or the location update request message includes a location area identity LAI including a common public land mobile network identifier common PLMN ID, or the location update request message includes an LAI including a common PLMN ID and includes a circuit switched domain public land mobile network identifier CS domain PLMN ID. The present invention is applicable to the field of communications systems.

Abstract: The present invention discloses an overload control method, a gateway device, a mobility management entity, and a PGW. The method includes: determining, by a gateway device, first overload indication information, where the first overload indication information is used to indicate an overload control policy; and sending, by the gateway device, the first overload indication information to a mobility management entity, so that the mobility management entity executes the overload control policy according to the first overload indication information. According to the overload control method, the gateway device, the mobility management entity, and the PGW in embodiments of the present invention, adverse impact brought by device overload can be avoided; therefore, the device overload can be effectively controlled.

Abstract: Embodiments of the present invention provide an IP address allocation method in D2D communication and user equipment. The method provided in the present invention includes: sending, by first user equipment UE, a first message to second UE, where the first message includes a first IP address allocated by the first UE to the second UE; and receiving, by the first UE, a second message sent by the second UE, where the second message is used to indicate whether allocation of the first IP address succeeds or fails.

Abstract: The present invention discloses an overload control method, a gateway device, a mobility management entity, and a PGW. The method includes: determining, by a gateway device, first overload indication information, where the first overload indication information is used to indicate an overload control policy; and sending, by the gateway device, the first overload indication information to a mobility management entity, so that the mobility management entity executes the overload control policy according to the first overload indication information. According to the overload control method, the gateway device, the mobility management entity, and the PGW in embodiments of the present invention, adverse impact brought by device overload can be avoided; therefore, the device overload can be effectively controlled.

Abstract: A mobile core network with distributed data services is provided. The mobile core network includes distributed mobile cores associated with mobile data service (MDS) agents at distributed data centers. A central MDS agent is host at a central data center providing legacy mobility management entity (MME) functions. The central MDS agent and the MDS agents at the distributed data centers coordinate with each other for synchronizing context information, such as subscriber data, session context data and metrics data of UEs, so that the context information is available at the central data center and the distributed data centers when or before it is requested.

Abstract: Embodiments of the present disclosure provide an RTP packet transmission method and apparatus. A GCS AS or a BM-SC provides synchronization source information of the GCS AS and synchronization source information of the BM-SC for UE, so that the UE can continuously receive RTP packets. On one hand, the GCS AS (or the BM-SC) may provide the synchronization source information of the GCS AS (or the synchronization source information of the BM-SC) for the UE by sending an RTP packet. On the other hand, the GCS AS (or the BM-SC) further provides the synchronization source information of the BM-SC (or the synchronization source information of the GCS AS) for the UE. Therefore, when being in a unicast (multicast) transmission mode, the UE can obtain both of the synchronization source information of the GCS AS and the synchronization source information of the BM-SC.

Abstract: The present invention relates to the communications field and provides a group communication method. The method includes: obtaining location information of UE; when determining that an L-BM-SC is deployed at a location of an eNB to which the UE belongs, determining, according to the location information of the UE, an MCE that manages the eNB to which the UE belongs; and sending a first bearer activation request to the MCE, where the first bearer activation request includes the location information of the UE, so that the MCE determines, according to the location information of the UE, a first L-BM-SC deployed at the location of the eNB to which the UE belongs, and establishes a bearer between the first L-BM-SC and a GCS AS, where the bearer between the first L-BM-SC and the GCS AS is used by the GCS AS to send a packet to the first L-BM-SC.

Abstract: A mobile core network with distributed data services is provided. The mobile core network includes distributed mobile cores associated with mobile data service (MDS) agents at distributed data centers. A central MDS agent is host at a central data center providing legacy mobility management entity (MME) functions. The central MDS agent and the MDS agents at the distributed data centers coordinate with each other for synchronizing context information, such as subscriber data, session context data and metrics data of UEs, so that the context information is available at the central data center and the distributed data centers when or before it is requested.