Abstract: This application discloses a method for a handover of a mobile station between a source base station and a target base station. The target base station receives a handover request message from the source base station. The handover request message includes quality of service (QoS) information of the mobile device, radio bearer identifier information of the source base station, and a first mapping relationship between a flow and a radio bearer of the source base station. The target base station sends a handover acknowledgement message to the source base station.

Abstract: Embodiments of the present invention disclose a measurement method, including: acquiring, by user equipment, a status of using a target unlicensed frequency band by a target radio access technology RAT; and selecting, by the user equipment, a corresponding measurement mode according to the usage status to measure a radio condition of the target unlicensed frequency band. The embodiments of the present invention further disclose user equipment, a network device, and a system. In the present invention, the user equipment can accurately measure the radio condition of the unlicensed frequency band, so as to provide reference information for the network device to schedule the user equipment.

Abstract: Embodiments disclose a cell status changing method. The method includes receiving, by user equipment, a first indication sent by a master base station, where the first indication is used to indicate a status change of a first cell of the master base station or a status change of a second cell of a secondary base station; and performing activation on the first cell or the second cell according to the first indication, or performing deactivation on the first cell or the second cell according to the first indication. In embodiments, both the master base station and the secondary base station serve the UE and undergo carrier aggregation, and the UE may obtain, by using the received first indication sent by the master base station, an active state or an inactive state of a serving cell that belongs to a base station that serves the UE.

Abstract: This application provides method and apparatus for RRC state control. An access network device obtains RRC connected inactive state indication information of UE. When the UE leaves an RRC connected state, the access network device determines, based on the RRC connected inactive state indication information, that the UE enters an RRC connected inactive state or an RRC idle state, so that the access network device can control, based on a state of the UE, the UE to enter an appropriate RRC state, thereby reducing signaling overheads and improving system performance.

Abstract: A method of distributing a security key context, where the method includes receiving, by a mobility management entity, a first indication from a primary base station, where the first indication is used for requesting a path switch from the mobility management entity and indicating that the path switch is triggered by carrier aggregation between base stations, processing the path switch according to the first indication, and keeping, according to the first indication, the security key context for the path switch unchanged, and sending a second indication to the primary base station, to indicate the primary base station to keep the security key context unchanged, or sending a third indication to the primary base station, to indicate the primary base station to acquire a quantity of times of reversal of a next hop chaining counter in the security key context.

Abstract: Embodiments relate to the field of communications technologies, and specifically, to a mobility management method, an apparatus, and a system. Embodiments of the present invention provide the mobility management method, the apparatus, and the system. When a primary cell of user equipment is changed, a change of the primary cell is performed through modification but not through conventional handover, so that data transmission is uninterrupted when the primary cell is changed.

Abstract: Embodiments of the present disclosure provide a data transmission method, user equipment, and an access network device. UE transmits air interface data to an access network device by using a serving cell set including at least two core serving cells that can independently serve the UE to transmit data, and initiates an RRC connection re-establishment process to the access network device only when detecting that all core serving cells in the serving cell set are unavailable. Data transmission is performed by using an available serving cell to the greatest extent. In other words, data transmission can be performed by using any available core serving cell, to reduce the dependence of data transmission between serving cells and minimize possibility of data transmission interruption, thereby improving data transmission robustness.

Abstract: By using a method for coordination between base stations, one base station allocates a resource to user equipment in a better manner with reference to resource configuration information saved in the base station and resource configuration information of another base station. The method provided in the embodiments of the present invention includes: acquiring, by a first base station, resource configuration information of a first cell, where the first cell is a cell served by the first base station; receiving resource configuration information of a second cell sent by a second base station, where the second cell is a cell served by the second base station; and allocating a resource to user equipment according to the resource configuration information of the first cell and the resource configuration information of the second cell, so that the user equipment communicates with the first cell and the second cell.

Abstract: The present invention provides a communication security processing method and an apparatus. The communication security processing method includes: determining, by a base station, that user equipment UE needs to access an access point AP; acquiring, by the base station, a security parameter that is required for the UE to interact with the AP; after an air interface is securely activated, sending, by the base station, the security parameter to the UE, so that the UE performs, by using the security parameter, security processing on data exchanged between the UE and the AP. According to the communication security processing method and the apparatus that are provided in the present invention, a security air interface between UE and a base station is used to transfer a security-related parameter, which improves data communication security, and enhances network control performed by an operator.

Abstract: A communication method and a device for reducing data transmission interruption during handovers are provided. The method includes: receiving instruction information, where the instruction information is used to instruct user equipment to establish and/or maintain uplink synchronization of the user equipment with a first cell controlled by a first base station; when the user equipment is in uplink synchronization with the first cell according to the instruction information, the user equipment is in a radio resource control RRC connected state, and a serving cell of the user equipment is a second cell controlled by a second base station; and handing over the user equipment from the second cell to the first cell that is in uplink synchronization with the user equipment, and performing communication based on the first cell.

Abstract: Embodiments of the present invention relates to a wireless network handover method, a base station and a user equipment. The wireless network handover method includes: sending, by a source base station, a handover request to a target base station, where the handover request includes information about a candidate wireless fidelity access point Wi-Fi AP; and sending, by the source base station, a wireless resource control RRC connection reconfiguration message to a user equipment UE, where the RRC connection reconfiguration message is used to instruct the UE to hand over from the source base station to the target base station, and the RRC connection reconfiguration message includes information that is about a target Wi-Fi AP and obtained by the target base station according to the information about the candidate Wi-Fi AP.

Abstract: Embodiments of the present disclosure disclose a data retransmission communication method and a terminal for implementing inter-base station carrier aggregation, where the method includes: receiving, by a first Radio Link Control (RLC) entity of a terminal, a packet data unit PDU; and when the first RLC entity determines that the PDU reaches a maximum quantity of retransmissions, instructing, by the first RLC entity, a second RLC entity of the terminal to transmit the PDU, where the first RLC entity is corresponding to a first base station, and the second RLC entity is corresponding to a second base station. By using the method and the terminal in the embodiments, frequency of RRC connection re-establishment is reduced, and a data packet loss caused by frequent re-establishment is further avoided, thereby improving user experience.

Abstract: Embodiments of the present invention provide a communication method and apparatus applied to a hyper cell. The method includes: sending, by UE, an uplink reference signal; measuring, by a TP in the hyper cell, the uplink reference signal sent by the UE; and updating, by a radio access network controller based on a measurement report from the TP, a TP set that provides a communications service for the UE. According to the embodiments of the present invention, UE load and difficulty in mobility management in a hotspot area are reduced.

Abstract: The present invention provides a method for determining a timing advance group of a serving cell, including: determining, by a source base station of a user equipment, a target base station that the user equipment is to be handed over to; sending auxiliary information for determining a timing advance group of a target serving cell of the user equipment to the target base station; receiving the timing advance group of the target serving cell of the user equipment that is determined by the target base station according to the auxiliary information; and sending the timing advance group to the user equipment. Implementation of the method provided by the present invention can avoid timing advance grouping performed on a secondary carrier after handover, and reduce data transmission interruption or delay incurred by the handover, thereby improving quality of service of a communications service.

Abstract: The present disclosure relates to a notification method. In one example method, a first base station configures a first cell identity for a first cell. The first cell identity comprises a first identifier field and a second identifier field. A reserved bit in the second identifier field and the first identifier field identify the first base station. A remaining bit in the second identifier field identifies the first cell. The first base station notifies a second base station or a core network device of a part of the first cell identity that identifies the first base station.

Abstract: Embodiments of the present invention provide a splitting method, a base station, and user equipment. The method in the present invention includes: sending, by a base station, an authentication indication to user equipment; acquiring, by the base station, an authentication status report indicating that the user equipment is admitted to the WLAN; and determining, by the base station according to the authentication status report, that the base station exchanges, with an access point of the WLAN, a first data stream of a data stream to be processed, where the data stream to be processed is a data stream that is to be sent by the base station to the user equipment or a data stream that is to be sent by the user equipment to the base station.

Abstract: The present invention provides a method for determining a rank indication (RI) bit number, a base station, and a terminal. The method includes: determining, by a base station, indication information according to a correspondence between a terminal and the base station and a multi-input multi-output (MIMO) capability of the terminal, where the indication information includes information used by the terminal for determining a bit number occupied for sending a RI; and sending, by the base station, the indication information to the terminal, so that the terminal determines, according to the indication information, the bit number occupied for sending the RI. In the present invention, the UE and the base station agree or understanding of the bit number occupied by RI information.

Abstract: A radio release control (RRC) connection release method includes: sending, by user equipment (UE), a first message to a base station, where the first message carries a preset RRC release time determining parameter or a first RRC release time; if the UE adds the first RRC release time to the first message, setting, by the UE, timing duration of a first timer based on the first RRC release time, and starting the first timer; and releasing, by the UE, an RRC connection when the first timer expires.

Abstract: A data transmission method including sending, by a base station, request information, an identifier of a wireless local area network (WLAN) access point (AP), and a first Internet Protocol (IP) address of the base station to user equipment, receiving, by the base station, a second IP address assigned by the WLAN AP to the user equipment and confirmation information that are sent by the user equipment, and performing, by the base station, multi-stream aggregation data transmission to the user equipment using the WLAN AP and through the IP tunnel, where the IP tunnel is determined using the first IP address and the second IP address.

Abstract: The invention discloses a method of obtaining user equipment context information that includes: receiving, by a first base station, a first radio resource control (RRC) connection establishment request sent by a user equipment (UE), where the first RRC connection establishment request carries connection status information before the UE sends the first RRC connection establishment request; determining, by the first base station according to the connection status information, whether the first base station meets a condition for requesting the UE context information; if the first base station determines that the first base station does not meet the condition for requesting the UE context information, sending, by the first base station, the UE context information establishment request to a mobility management entity (MME); and receiving, by the first base station, a response message sent by the MME for responding to the UE context information establishment request, where the response message carries the UE contex