Abstract: The present invention provides a communication method to solve a problem of a failure in data receiving that arises. The method includes: sending, by a first base station, first data to UE according to first data allocation information that is determined according to a radio access capability of the UE; and sending, by a second base station according to second data allocation information that is determined by the first base station according to the radio access capability of the UE, second data to the UE; where the first base station performs carrier aggregation with the second base station, and a total amount of data that is sent by the first base station and the second base station to the UE in a same TTI does not exceed a total amount of data that can be received according to the radio access capability of the UE.

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: 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: 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 on understanding of the bit number occupied by RI information.

Abstract: Embodiments of the present invention disclose a method, a base station, and a system for sending RRC signaling, and in the method for sending RRC signaling provided in the embodiments of the present invention, a pico base station and a macro base station participate in configuration and generation of an RRC reconfiguration message; the pico base station establishes only one RRC entity that is used to generate a configuration parameter or an RRC entity; the RRC reconfiguration message cooperatively generated by the pico base station and the macro base station is uniformly sent by the macro base station to a user equipment. Therefore, the user equipment UE can support, only by establishing an SRB corresponding to the macro base station, an RRC reconfiguration message sent by the pico base station, thereby lowering design complexity and costs.

Abstract: A communication method includes: receiving, by a user equipment, measurement configuration information sent by a base station, where the measurement configuration information is used to instruct the user equipment to perform measurement on a WiFi AP, and the measurement configuration information includes a WiFi measurement object and a WiFi measurement quantity; performing, by the user equipment, measurement on the WiFi measurement object according to the WiFi measurement quantity, to obtain a measurement report; and sending, by the user equipment, the measurement report to the base station, so that the base station determines, according to the measurement report, to offload the user equipment to the WiFi AP or stop communication between the user equipment and the WiFi AP.

Abstract: The present invention discloses a migration method and an apparatus, which relate to the field of communications technologies and are invented for implementation of proper configuration of different network resources. The method includes: sending, by a base station of a first network, information to a user equipment, where the information is used for: migrating, by the user equipment, from a second network to the first network, where the user equipment is in an idle state relative to the first network; or determining, by the user equipment, whether to migrate from the first network to the second network, where the first network is a 3GPP network, and the second network is a non-3GPP network. The present invention is mainly applied to a process of network migration of the user equipment.

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 invention disclose a primary secondary cell change method and a base station. The primary secondary cell change method in the embodiments of the present invention includes: determining, by a primary base station, to change a first primary secondary cell served by a secondary base station, and selecting a second primary secondary cell from cells served by the secondary base station; sending, by the primary base station, a first message to the secondary base station, which is used to request the secondary base station to change the primary secondary cell, where the first message includes an identity of the second primary secondary cell; and sending, by the primary base station, a second message to a user equipment UE, which is used to request the UE to use the second primary secondary cell.

Abstract: Embodiments of the present invention provide a data forwarding method, device, and communications system, which relate to the field of communications and can achieve accuracy and continuity of data transmission during carrier aggregation for cells between base stations. The method includes: sending, by a primary base station, a first message to a secondary base station, where the first message is used to instruct the secondary base station to perform handover, and the first message includes an identifier of a target base station; confirming, by the primary base station, that the secondary base station forwards data to the target base station; and sending, by the primary base station, a second message to a user equipment, where the second message is used to instruct the user equipment to acquire the data from the target base station. The embodiments of the present invention are used for data forwarding.

Abstract: The invention relates to a quick calibration method for an inertial measurement unit (IMU). According to the method, a user holds and rotates the IMU to move in all directions without any external equipment, so that twelve error coefficients including gyro biases, gyro scale factors, accelerometer biases and accelerometer scale factors can be accurately calibrated in a short time. The quick calibration method for the IMU is characterized by being free of hardware cost, high in efficiency and simple and easy to implement, and can ensure certain calibration precision. Thus, the quick calibration method is especially suitable for in-situ quick calibration for the medium- and low-grade IMUs, thereby effectively solving the problem of environmental sensitivity of the error coefficients of the mechanical IMU, and promoting popularization and application of MEMS (micro-electro mechanical systems) inertial devices.

Abstract: This invention discloses a method for security communication of carrier aggregation between base stations, which method comprises receiving, by a user equipment, a first message to add a cell controlled by a secondary base station as a service cell sent by a primary base station; and creating, by the user equipment, a security key for communication with cells controlled by the secondary base station according to security context of the primary base station and the first message. This invention further discloses the corresponding user equipment and base stations. Implementation of the method and apparatus according to the present invention makes it possible to effectively protect security of data transmission of the air interface and to avoid attacks on air interface security.

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: Embodiments of the present invention provide a method, a base station, and a user equipment for implementing carrier aggregation. The method includes: determining, by a primary base station, to add a cell for a user equipment UE; and sending, by the primary base station, a first message to the UE, where the first message is used to instruct the UE to add the cell, the first message includes configuration information of the cell and an identifier or index of a base station to which the cell belongs, and the base station to which the cell belongs is a secondary base station. In the embodiments of the present invention, under the control of the primary base station of the UE, a cell of another base station can be added for the UE, so as to implement carrier aggregation between base stations, thereby further increasing user throughput of the UE.

Abstract: Embodiments of the present invention provide a signal processing method and a terminal. The method includes: receiving a control signal. Channel state information between a coordinated base station and the terminal and between the serving base station and the terminal is determined. Information is about determined time difference or information about a phase difference of arrival between signals sent by the coordinated base station and the serving base station at the terminal according to the channel state information. Adjustment information is sent to the serving base station so that the serving base station adjusts the sending time, phase, or pre-coding manner of the signal according to the adjustment information.

Abstract: A wavelength locking method, apparatus, and system are provided. The wavelength locking method includes modulating, by using scrambling signals with a same frequency and different phases, each one of a plurality of optical channel signals respectively; processing, by a combiner, a splitter, and a wavelength locker, the modulated optical signals, so as to acquire photoelectricity detector (PD) signals; performing phase discrimination on the PD signals to acquire wavelength information of the optical channels; determining different shift values corresponding to the different wavelength information; and adjusting wavelengths of the optical channels according to the corresponding shift values.

Abstract: A wavelength locking method, apparatus, and system are provided. The wavelength locking method includes modulating, by using scrambling signals with a same frequency and different phases, each one of a plurality of optical channel signals respectively; processing, by a combiner, a splitter, and a wavelength locker, the modulated optical signals, so as to acquire photoelectricity detector (PD) signals; performing phase discrimination on the PD signals to acquire wavelength information of the optical channels; determining different shift values corresponding to the different wavelength information; and adjusting wavelengths of the optical channels according to the corresponding shift values.

Abstract: In the field of photonic integrated communication, a method and an apparatus for filtering locking are provided, so as to solve the problem in the conventional wavelength locking technology that any increase of the wave number also incurs increases in costs and circuit complexity, and it is difficult to extract dithered information. The method and apparatus for filtering locking employ a centralized wavelength locking method of injecting a single dither to a Photonic Integrated Device (PID)/Photonic Integrated Circuit (PIC), thereby reducing circuit board area and control circuit complexity. A weak dither signal can be accurately extracted by means of a combination of analog filtering and digital filtering. The technical solution is appropriate for use in photonic integrated systems in which two or more PID/PIC chips with multi-wavelength modules are cascaded.

Abstract: A method for controlling wavelengths of a multi-path laser is provided. The method includes: obtaining a difference between an actual output wavelength and a target output wavelength of each laser (S601); obtaining a corrected control amount of a temperature controller of each laser by decoupling calculation according to the difference (S602); and determining a die temperature of each laser according to the corrected control amount of the temperature controller (S603). A system for controlling wavelengths of a multi-path laser includes a multi-path laser (10), a difference module (12), a decoupling module (14), and a temperature control module (16).