Abstract: A method for random access in an idle state and a device, in which the method includes: sending, by user equipment (UE), a random access preamble to a evolved NodeB (eNB), and receiving a random access response message that is sent by the eNB according to the random access preamble; sending, by the UE, a first message to the eNB according to first uplink grant information; and receiving, by the UE, second uplink grant information sent by the eNB, and sending to-be-sent data to the eNB according to the second uplink grant information. According to the method for random access in an idle state and the device provided in the embodiments of the present invention, accuracy of uplink resource allocation is improved during random access of UE in an idle state.

Abstract: Embodiments of the present invention provide a method for random access in an idle state and a device. The method includes: sending, by user equipment (UE), a random access preamble to a evolved NodeB (eNB), and receiving a random access response message that is sent by the eNB according to the random access preamble; sending, by the UE, a first message to the eNB according to first uplink grant information; and receiving, by the UE, second uplink grant information sent by the eNB, and sending to-be-sent data to the eNB according to the second uplink grant information. According to the method for random access in an idle state and the device provided in the embodiments of the present invention, accuracy of uplink resource allocation is improved during random access of UE in an idle state.

Abstract: A data transmission method and an apparatus are provided. The method includes: determining, by a base station, a time-domain interval of available time-frequency resources in an unlicensed spectrum, where the available time-frequency resources are continuous time-frequency resources in a time domain; sending, by the base station, a preamble signal in a first subframe in the interval, where the first subframe is an initial subframe in the interval; and sending, by the base station, downlink control information and data after sending the preamble signal, where the data is in the first subframe, the downlink control information includes scheduling indication information, and the scheduling indication information is used to indicate a frequency-domain location of the data. According to the present invention, spectrum utilization can be improved.

Abstract: Resource scheduling includes pre-dividing a resource block RB into a plurality of sub-RBs and scheduling a UE by using a resource scheduling indication during data transmission to perform data receiving or sending in a position of a corresponding sub-RB. The resource block RB is pre-divided into a plurality of sub-RBs and during data transmission the UE is scheduled by using the resource scheduling indication to perform data receiving or sending in the position of the corresponding sub-RB, thereby improving resource utilization efficiency during transmission of a small data service and improving transmission efficiency of small data.

Abstract: An embodiment of the present invention discloses a method for controlling data transmission, where the method includes: receiving, by user equipment UE, at least one transmission control parameter transmitted by a base station; and when the UE needs to initiate data transmission to the base station, applying, by the UE, the transmission control parameter to control data transmission. An embodiment of the present invention further discloses a terminal device.

Abstract: A method includes: obtaining, by a communication device, a configuration message sent and a secondary cell activation command for a first secondary cell; determining, by the communication device, according to the configuration message, a second secondary cell configured with a physical uplink control channel (PUCCH), the second secondary cell is in an active state, sending, by the communication device, after a preset time point after the secondary cell activation command is received, a channel status information (CSI) report of a first secondary cell on the PUCCH of the second secondary cell.

Abstract: The present invention discloses a method and device for maintaining service continuity. The method for maintaining service continuity includes: receiving, by a base station, a first notification, which is sent by an MCE, for stopping scheduling of an MBMS service; and notifying, by the base station, user equipment of MBMS service scheduling stop information, and continuing to schedule the MBMS service. In this way, a service interruption time that is caused when UE receives a service after an MCE stops scheduling of the service can be effectively reduced.

Abstract: The present invention provides a demodulation reference signal transmission apparatus, system, and method. The method includes: sending, by a base station, a configuration indication to user equipment UE, where the configuration indication is used to instruct the UE to send an independent DMRS and/or instruct the UE to send a combination of a DMRS and uplink data; and subsequently receiving, by the base station, the independent DMRS sent by the UE; and/or receiving the combination of the DMRS and the uplink data sent by the UE. In this way, the base station can trigger the UE to send the foregoing DMRS to complete frequency offset estimation, thereby improving accuracy of the frequency offset estimation.

Abstract: A data transmission method and an apparatus are provided. The method includes: determining, by a base station, a time-domain interval of available time-frequency resources in an unlicensed spectrum, where the available time-frequency resources are continuous time-frequency resources in a time domain; sending, by the base station, a preamble signal in a first subframe in the interval, where the first subframe is an initial subframe in the interval; and sending, by the base station, downlink control information and data after sending the preamble signal, where the data is in the first subframe, the downlink control information includes scheduling indication information, and the scheduling indication information is used to indicate a frequency-domain location of the data. According to the present invention, spectrum utilization can be improved.

Abstract: The present invention provides a carrier aggregation capability reporting apparatus and method, so as to prevent UE from repeatedly reporting capability information corresponding to a carrier combination supported by the UE, and reduce waste of signaling resources used for reporting. The method in the present invention includes: determining, by user equipment UE, information about a carrier combination supported by the UE and information about a sub-combination that is of the carrier combination and that is supported by the UE; and reporting, by the UE to a base station, the determined information about the carrier combination supported by the UE and the determined information about the sub-combination that is of the carrier combination and that is supported by the UE.

Abstract: Embodiments of the present disclosure provide a paging method, apparatus, and system, so as to implement paging of a UE in an area with relatively poor signal coverage. The UE includes: a receiving unit, configured to receive a broadcast message from a base station; and a determining unit, configured to determine whether the UE is first UE where the determining unit is further configured to: in a case in which it is determined that the UE is the first UE, determine a start PF and a start PO according to the first radio frame parameter; the determining unit is further configured to determine a first subframe set according to the start PF and the start PO; and the receiving unit is further configured to receive, according to the start PF, the start PO, and the first subframe set, a paging message sent by the base station.

Abstract: A method includes: receiving, by UE, a configuration message sent by a base station, and determining, according to the configuration message, a type of a PUCCH that is used by a secondary cell to report a CSI report; receiving, by the UE, a secondary cell activation command that is sent by the base station and that carries a cell identity; and determining, by the UE according to the type of the PUCCH that is used by the secondary cell to report the CSI report and the secondary cell activation command, an application time of a CSI report of a secondary cell corresponding to the cell identity.

Abstract: The present invention provides a communication method includes: determining, by a base station, radio frame configuration information; sending, by the base station, the determined radio frame configuration information to user equipment UE, where the radio frame configuration information is used to instruct the UE to set at least one of N consecutive downlink subframes of one radio frame as a first subframe, and/or the radio frame configuration information is used to instruct the UE to set at least one of M consecutive uplink subframes of one radio frame as a second subframe, where the first subframe is used for uplink service transmission, the second subframe is used for downlink service transmission, and N and M are positive integers not less than 2; and communicating, by the base station, with the UE by using a radio frame configured according to the radio frame configuration information.

Abstract: Embodiments of the present invention provide a capability matching method, an apparatus, and a system. The method includes: before a user equipment (UE) initiates a random access process, identifying, by the UE, a capability of a network side device, and when the UE identifies that the network side device is a network side device that does not support low cost machine type communication (LC-MTC), reselecting, by the UE, to access another network side device. By means of the capability matching method, the apparatus, and the system provided in the embodiments of the present invention, a problem that a capability mismatch occurs between a UE and a network side device is avoided, and a waste of authorized resources, extra power consumption of a UE, and an interruption of data transmission are avoided.

Abstract: Embodiments of the present disclosure relate to the field of communications technologies, and provide a radio bearer reconfiguration method, a radio bearer establishment method, user equipment, and a base station. The method includes receiving, by a UE, a radio bearer reconfiguration indication sent by abase station, where the radio bearer reconfiguration indication includes a radio bearer identifier and a target configuration parameter, the radio bearer identifier indicates a target radio bearer that needs to be reconfigured, and the target configuration parameter corresponds to a configuration item of the target radio bearer that needs to be reconfigured; releasing, by the UE, the target radio bearer; and transmitting, by the UE, signaling and/or data on the corresponding target radio bearer according to the target configuration parameter.

Abstract: A terminal device, a network device, and a group communication method, where the terminal device includes a receiver configured to receive a first message from a network device, where the first message includes at least one group service identifier, and one group service identifier corresponds to one group service, and receive, according to the received first message, a first group service corresponding to a first group service identifier of the terminal device.

Abstract: Embodiments of the present invention provide a random access method and an apparatus. PRACH configuration information of is acquired, and a preamble is sent from a corresponding start PRACH resource. The solution includes: acquiring at least one group of physical random access channel PRACH configuration information carried in system information, parsing the at least one group of PRACH configuration information to obtain a corresponding start PRACH resource; and sending a preamble to a base station starting from the start PRACH resource.

Abstract: A mobility management method, user equipment, and a network device are provided. The mobility management method includes: receiving, by user equipment UE in a connected state, a handover-free UE identifier from a network device, where the handover-free UE identifier is used to uniquely identify the UE in a handover-free state in a handover-free area, and the handover-free area includes at least two cells; entering, by the UE, the handover-free state after meeting an activation condition, where in the handover-free state, the UE stores the handover-free UE identifier and a connection context that is of the UE in the connected state, and the UE does not execute a handover procedure when the UE moves in the handover-free area; sending, by the UE, the handover-free UE identifier to the network device after the UE determines that a deactivation condition is met.

Abstract: A communications method and device for multi-carrier aggregation, where the method includes: grouping by a base station, N serving cells into K cell groups, where N is an integer greater than zero, and K is an integer less than N, sending, by the base station, a cell grouping message to user equipment (UE), where the cell grouping message indicates that the N serving cells are grouped into the K cell groups, and communicating, by the base station, with the UE according to the K cell groups. Hence, signaling overheads can be reduced.

Abstract: Embodiments of the present invention provide a paging method, apparatus, and system, so as to implement paging of UE in an area with relatively poor signal coverage. UE includes: a receiving unit, configured to receive a broadcast message sent by a base station; and a determining unit, configured to determine whether the UE is first UE where the determining unit is further configured to: in a case in which it is determined that the UE is the first UE, determine a start PF and a start PO according to the first radio frame parameter; the determining unit is further configured to determine a first subframe set according to the start PF and the start PO; and the receiving unit is further configured to receive, according to the start PF, the start PO, and the first subframe set, a paging message sent by the base station.