Abstract: A data transmission method and device, related to the communications field, are disclosed, so as to resolve a prior-art problem that a data decoding error occurs on user equipment because data packets sent by different coordinated network devices to the same user equipment on a same time-frequency resource are different resulting from a data packet loss. A specific solution is: receiving a scheduling grant message (201), where the scheduling grant message includes an identifier of a data packet and time-frequency resource information; and when it is determined, according to the identifier of the data packet, that the data packet is stored in a buffer, sending, according to the time-frequency resource information, the data packet to user equipment on a time-frequency resource indicated by the time-frequency resource information (203); or if the data packet is not stored in a buffer, skipping sending the data packet (204).

Abstract: The present disclosure provide a data transmission method, including: receiving, by a central processing node, downlink user data from a first gateway GW; sending, by the central processing node, the downlink user data to a corresponding base station; and when it is determined that an interface between the central processing node and the first GW is congested, sending, by the central processing node, a first bearer switching request message to the first GW, where the first bearer switching request message is used to instruct the first GW to bypass the central processing node when transmitting data. In the embodiments of the present invention, when determining that an interface between a central processing node and a first GW is congested, the central processing node sends a first bearer switching request message to the first GW, so that the first GW transmits downlink user data with the central processing node bypassed.

Abstract: A baseband processing apparatus in a radio communication system, a radio communication system, and a baseband processing method. The apparatus includes a first unit and a second unit that implement different baseband processing functions, where the second unit is configured to generate a precoding matrix of a downlink coordinated multipoint transmission and reception (CoMP) user, generate precoding control information according to the precoding matrix, and send the precoding control information to the first unit; and the first unit is configured to receive the precoding control information sent by the second unit, and perform downlink joint baseband processing on downlink CoMP user data in downlink user data according to the precoding control information, so as to generate jointly sent baseband data for radio sending. The technical solutions can reduce transmission bandwidth between baseband processing units and obtain a system capacity gain at the same time.

Abstract: Embodiments of the present invention provide a data transmission method, a forwarding information update method, a communications device, and a controller. The communications device includes: a forwarding module and one or more interfaces, where the forwarding module receives a data packet sent to a receive end; determines, according to a correspondence between data filtering template information of the data packet and interface information in forwarding information maintained by the forwarding module, an interface for forwarding the data packet to the receive end, where if data packet transmission is performed by using a specific radio access technology between the communications device and a next hop to which the communications device forwards the data packet, the interface is an interface corresponding to the radio access technology; and forwards the data packet to the interface; and the interface receives the data packet sent by the forwarding module, and forwards the data packet.

Abstract: Embodiments of the present invention disclose a method for accessing a base station, a base station and a user equipment, belonging to the field of communications technologies. The method includes: establishing, by a current macro base station, a control plane connection with a user equipment according to an access request of the user equipment, and assigning a first cell-radio network temporary identity to the user equipment; and when receiving a measurement report of pico base stations reported by the user equipment, selecting a pico base station for the user equipment according to a preset policy so that the user equipment establishes a data plane connection with the pico base station, and notifying context information of the user equipment to the pico base station, where the context information includes the first cell-radio network temporary identity assigned to the user equipment.

Abstract: The present invention disclosure provides a data processing method and apparatus, and a control method and apparatus, so as to resolve a technical problem that a data processing manner existing in the prior art cannot meet a requirement of a new processing procedure. A data processing apparatus may determine a specific processing action sequence for communication data according to a filter template sent by a control apparatus and a feature of the communication data. Therefore, for different communication data, the data processing apparatus can determine different processing action sequences. In addition, when a new service emerges and a new data processing procedure is required, because the data processing apparatus and the control apparatus are separate from each other, only the control apparatus needs to be adjusted and the data processing apparatus does not need to be adjusted.

Abstract: The present invention relates to a data transmission method and a communications device. The communications device includes: a memory, a processor, and a communications interface. The memory is configured to store mapping information between a data flow identifier and a physical layer transmission technology identifier.

Abstract: An embodiment includes a method. The method includes determining, by a first node device in a network, a first master clock according to a first clock data set of the first node device and a first clock data set of another node device in the network, and synchronizing to the first master clock, where the first clock data set includes a first clock domain selection parameter of a node device. The method also includes determining, by the first node device, a second master clock according to a second clock data set of the first node device and a second clock data set of another node device that belongs to a same first node clock domain as the first node device does, and synchronizing to the second master clock, where the second clock data set includes a second clock domain selection parameter of a node device.

Abstract: The embodiments of the present invention provide a method, apparatus, and system. The method comprises: sending, by a centralized processing node, control information containing address information of a service ERRU and the transmission mode of ERRUs to the ERRUs in a COMP set; receiving the compressed uplink COMP frequency domain data sent by the service ERRU according to the transmission mode, wherein the compressed uplink COMP frequency domain data are data obtained by the service ERRU by compressing the original uplink COMP frequency domain data sent by the non-service ERRUs and the original uplink COMP frequency domain data of the service ERRU, and receiving the original uplink COMP frequency domain data sent by at least one ERRU according to the transmission mode. In the present invention, the data are compressed to reduce the uplink transmission flow between the ERRUs in the COMP set and the centralized processing node.

Abstract: A feedback method and system for an uplink hybrid automatic repeat request, and a related device are provided. The method comprises: determining a first transmission and processing time period, wherein the first transmission and processing time period comprises a transmission and processing time period from a time when uplink data is received by a remote radio unit (RRU) to a time when the RRU sends feedback information of the uplink data; and sending, in a case that the first transmission and processing time period is longer than a predetermined feedback delay and before a decoding result of the uplink data is obtained, virtual feedback information of the uplink data and/or scheduling information of the uplink data to the RRU, which in turn sends the virtual feedback information of the uplink data and/or the scheduling information of the uplink data to a user terminal in a predetermined subframe.

Abstract: The present invention provides a synchronization method, an intermediate node, and a slave node. An intermediate node obtains, according to a local clock frequency of the intermediate node and an obtained clock frequency of a previous node, a frequency offset of the intermediate node relative to the previous node; the intermediate node obtains, according to the frequency offset of the intermediate node relative to the previous node and an obtained frequency offset of the previous node relative to a master clock, a frequency offset of the intermediate node relative to the master clock; the intermediate node transmits the frequency offset of the intermediate node relative to the master clock to a next node, so that a slave node corrects, according to the frequency offset of the intermediate node relative to the master clock, a clock frequency of the slave node or a clock frequency and time of the slave node.

Abstract: The present patent application provides a method, an apparatus, and a system for generating a timestamp. The method includes: receiving, by a data packet processing unit, a data packet sent by a physical layer transceiver unit or an upper layer, and identifying whether the data packet is a precise time synchronization protocol PTP data packet, and if the data packet is a PTP data packet, generating, according to a physical layer delay provided by a physical layer delay acquiring unit and a non-physical layer delay provided by a non-physical layer delay acquiring unit, a precise timestamp and rewriting a timestamp field in the data packet.

Abstract: The present invention provides a data transmission method, apparatus and system, which relate to the field of the wireless network technology. The data transmission method provided in the embodiment of the present invention includes: acquiring a downlink data packet sent to a terminal, in which the downlink data packet does not have a high layer protocol stack header; sending the downlink data packet to the terminal through an air interface; Through the present invention, the data amount in the air interface transmission is reduced to a great extent, the efficiency of air interface transmission is substantially enhanced, and the air interface resource is saved, thereby facilitating the enrichment and development of wireless services and satisfying the demands of users. The present invention is applicable to a scenario of air interface transmission in a wireless network.

Abstract: A baseband processing apparatus in a radio communication system, a radio communication system, and a baseband processing method. The apparatus includes a first unit and a second unit that implement different baseband processing functions, where the second unit is configured to generate a precoding matrix of a downlink coordinated multipoint transmission and reception (CoMP) user, generate precoding control information according to the precoding matrix, and send the precoding control information to the first unit; and the first unit is configured to receive the precoding control information sent by the second unit, and perform downlink joint baseband processing on downlink CoMP user data in downlink user data according to the precoding control information, so as to generate jointly sent baseband data for radio sending. The technical solutions can reduce transmission bandwidth between baseband processing units and obtain a system capacity gain at the same time.

Abstract: The embodiments of the present invention provide a method, apparatus, and system. The method comprises: sending, by a centralized processing node, control information containing address information of a service ERRU and the transmission mode of ERRUs to the ERRUs in a COMP set; receiving the compressed uplink COMP frequency domain data sent by the service ERRU according to the transmission mode, wherein the compressed uplink COMP frequency domain data are data obtained by the service ERRU by compressing the original uplink COMP frequency domain data sent by the non-service ERRUs and the original uplink COMP frequency domain data of the service ERRU, and receiving the original uplink COMP frequency domain data sent by at least one ERRU according to the transmission mode. In the present invention, the data are compressed to reduce the uplink transmission flow between the ERRUs in the COMP set and the centralized processing node.

Abstract: A method for obtaining feedback delay includes: obtaining a target time elapsed in a process from when a remote radio end receives uplink data sent from a user end to when the remote radio end sends out feedback information responsive to the uplink data to the user end, wherein the feedback information responsive to the uplink data is fed back by a processing node to the remote radio end; calculating a feedback delay by adding the target time and an air interface transmission propagation delay, wherein the air interface transmission propagation delay is a transmission time of the uplink data from the user end to the remote radio end; and configuring, by the processing node, an uplink hybrid automatic repeat request (HARQ) ACK/NACK feedback interval to be the feedback delay.

Abstract: Embodiments of the present disclosure disclose a data transmission method which includes: sending, by an REC, a first part of downlink data of a downlink period to an RE before the downlink period arrives; sending, by the REC, a second part of the downlink data of the downlink period to the RE in the downlink period, where the second part and the first part constitute all downlink data of the downlink period; receiving, by the RE, the first part and the second part of the downlink data of the downlink period; and sending, by the RE, the first part and the second part as the downlink data through an air interface in the downlink period. Accordingly, the embodiments of the present disclosure also disclose a base station which can effectively improve utilization of transmission bandwidth of a CPRI interface and utilization of spectrum resources of the air interface.

Abstract: Embodiments of the present invention provide a method, an apparatus, and a system for handover processing. The method includes: receiving a handover request sent by a UE for handover to a micro base station; and sending instruction information to the UE according to a preset rule and the handover request, so as to instruct the UE to send start information, where the start information is used to instruct the micro base station to start an interference coordination mode used to enable the micro base station to mute preset time-frequency resources and corresponding to the start information. This prevents formation of a victim UE and greatly mitigates impacts caused by a coverage hole.

Abstract: Embodiments of the present invention disclose a method for accessing a base station, a base station and a user equipment, belonging to the field of communications technologies. The method includes: establishing, by a current macro base station, a control plane connection with a user equipment according to an access request of the user equipment, and assigning a first cell-radio network temporary identity to the user equipment; and when receiving a measurement report of pico base stations reported by the user equipment, selecting a pico base station for the user equipment according to a preset policy so that the user equipment establishes a data plane connection with the pico base station, and notifying context information of the user equipment to the pico base station, where the context information includes the first cell-radio network temporary identity assigned to the user equipment.

Abstract: Embodiments of the present disclosure disclose a data transmission method which includes: sending, by an REC, a first part of downlink data of a downlink period to an RE before the downlink period arrives; sending, by the REC, a second part of the downlink data of the downlink period to the RE in the downlink period, where the second part and the first part constitute all downlink data of the downlink period; receiving, by the RE, the first part and the second part of the downlink data of the downlink period; and sending, by the RE, the first part and the second part as the downlink data through an air interface in the downlink period. Accordingly, the embodiments of the present disclosure also disclose a base station which can effectively improve utilization of transmission bandwidth of a CPRI interface and utilization of spectrum resources of the air interface.