Abstract: Embodiments of the present invention relate to the field of communications technologies and disclose an information obtaining method and apparatus based on an unlicensed cell (Uscell). On an unlicensed cell, precision of obtained Uscell information is significantly improved, so as to enable a base station to complete addition and deletion of a Uscell. A specific embodiment of the present invention includes: obtaining detection indication information, where the detection indication information is used to instruct to identify a Uscell and/or instruct to measure a reference signal corresponding to the Uscell, then, performing detection according to the detection indication information, and reporting a detection result to a base station. Technical solutions provided in the present invention are mainly applied to an information obtaining process of the Uscell.

Abstract: Embodiments of the present invention provide an apparatus and a method for determining a transmission direction of a secondary carrier. A reference carrier of a first secondary carrier is obtained according to network configuration information, and a transmission direction of a subframe on the first secondary carrier is determined according to a transmission direction of a subframe on the reference carrier, so that data transmission directions of the reference carrier and the first secondary carrier are the same at a same moment. A transmission direction of data of the subframes on the first secondary carrier transmitted in a frequency band adjacent to a frequency band of the reference carrier is determined by using the reference carrier, thereby avoiding interference occurring when the adjacent frequency bands simultaneously transmit data of different directions.

Abstract: Embodiments of the present invention provide random access user equipment, including: a receiving module, configured to receive a notification message sent by a base station, where the notification message is used to instruct the user equipment UE to execute a random access procedure; a processing module, configured to determine, according to a configuration parameter in the notification message received by the receiving module, a PRACH resource used to execute the random access procedure; and a sending module, configured to send a random access code to the base station on the PRACH resource determined by the processing module; where the receiving module is configured to receive a random access response message sent by the base station. The embodiments of the present invention further provide a random access method. The present invention has an advantage that executing the random access procedure on an unlicensed spectrum can be implemented.

Abstract: A data transmission method, apparatus, and system are provided, where the method includes: receiving, by user equipment, a data scheduling request sent by a base station, where the data scheduling request carries resource information allocated to scheduled data by the base station, and the resource information includes an unlicensed spectrum resource; determining whether a condition for transmission of the scheduled data on an unlicensed spectrum is met; and if the condition for transmission of the scheduled data on the unlicensed spectrum is met, sending the scheduled data to the base station by using the unlicensed spectrum resource. In the present invention, data transmission reliability can be improved.

Abstract: Embodiments provide a random access method, a device. The method includes: determining whether a first preset condition is met, where the first preset condition includes: a difference between a maximum transmit power allowed by the user equipment and a power of sending the random access code in a previous random access attempt process is less than or equal to a power ramping factor, and/or, the previous random access attempt process fails. The method also includes, if the first preset condition is met, sending the random access code by using an enhancement mode in the current random access attempt process.

Abstract: A data transmission method, apparatus, and system, a network side device, and a terminal device. The data transmission method is applied to the terminal device and includes: setting the terminal device to be in a first non-activated state or a second non-activated state, where in the first non-activated state, the terminal device does not listen to a paging message, and in the second non-activated state, the terminal device listens to a paging message within a first preset listening time or a first preset quantity of listening times, and does not listen to a paging message when the first listening time or the first quantity of listening times is exceeded, setting the terminal device to be in a connected state, and sending, by the terminal device, the uplink data after updating system information; and receiving downlink data that is buffered by the network side device.

Abstract: A method for allocating an identification using an access network grouping scheme, and a method and apparatus for paging group are described. The ID allocating method comprises: receiving a group ID of a group of group-paged objects allocated by a core network device for a terminal device, wherein the group of group-paged objects comprises one or more subgroups; allocating a device ID or a user ID to the terminal device, wherein the device ID or the user ID comprises information of a subgroup ID of a subgroup to which the terminal device belongs; and sending the allocated device ID or user ID to the terminal device. The number of terminals in the subgroup is appropriate, and the resources are allocated more flexibly and reasonably.

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.

Abstract: The present disclosure provides a data scheduling method using an unlicensed spectrum, an apparatus, and a device, and relates to the radio communications field. According to the method, apparatus, and device, an unlicensed spectrum resource can be effectively used, thereby meeting a bandwidth requirement of an LTE device. The method is as follows: first, an unlicensed-spectrum serving cell is configured for user equipment by using a configuration message of the unlicensed-spectrum serving cell; then, data is transmitted over the unlicensed-spectrum serving cell by using a scheduling command. Embodiments of the present disclosure are applied to data transfer over the unlicensed-spectrum serving cell.

Abstract: Embodiments of the present disclosure provide a data transmission and feedback processing method and apparatus. The apparatus of the present disclosure includes: a first receiving module, configured to receive a data packet sent by a second device; an identification module, configured to identify an exception by the first device according to scheduling information corresponding to the received data packet and an SN carried in the data packet; and a feedback module, configured to determine the exception by the first device and send a feedback message to the second device, where the feedback message carries an SN, so that the second device retransmits a data packet to the first device according to the SN. The embodiments of the present disclosure resolve a problem that present uniform HARQ retransmission times cannot meet QoS requirements of different services, so that HARQ retransmission requirements for QoS of different services are met.

Abstract: The present invention discloses a method and an apparatus for reporting an unlicensed spectrum capability The method includes the following: UE reports a list of unlicensed spectrums that can be supported by the UE and a maximum bandwidth value of each unlicensed spectrum to a serving base station of the UE, so that the serving base station of the UE can configure an unlicensed spectrum resource for the UE according to a received unlicensed spectrum capability parameter. Therefore, a base station can configure an unlicensed spectrum resource according to unlicensed spectrum capabilities that can be supported by different UEs.

Abstract: Embodiments of the present invention provide a method for obtaining unlicensed frequency information and a device. The method includes: receiving, by the UE, third indication information sent by the base station, where the third indication information is used to enable the UE to obtain use information of the unlicensed frequency and report use information, obtained within a preset time, of the unlicensed frequency; obtaining, by the UE, the use information of the unlicensed frequency according to the third indication information; and reporting the use information, obtained within the preset time, of the unlicensed frequency to the base station. By means of the method, the base station can obtain related information of an unlicensed frequency by using the UE. Therefore, the UE can perform communication by properly using the unlicensed frequency.

Abstract: Embodiments of the present invention relate to the communications field, and provide an apparatus, a method, and a system for cell selection, so that a terminal device can communicate normally. The method includes: measuring a received signal communication parameter value of a first cell; determining whether the communication parameter value is greater than a first threshold; if the communication parameter value is less than or equal to the first threshold, obtaining a second threshold; determining whether the communication parameter value is greater than the second threshold; and if the communication parameter value is greater than the second threshold, setting the first cell as a serving cell of the terminal device. The apparatus, the method, and the system for cell selection provided in the embodiments of the present invention are used to select a cell.

Abstract: Embodiments of the present invention provide a core network device, an access network device, and a data offloading method and system, and relate to the field of mobile communications. In the system, the access network device receives an offloading inclination indication of service data from the core network device; the access network device allocates, according to the offloading inclination indication, a transmission resource used for transmitting the service data; and the access network device transmits the service data by using the allocated transmission resource. In the present invention, quality of service (QoS) in the transmission process can be ensured even if data is offloaded by using a first resource such as an unlicensed spectrum, a transmission resource provided by Wireless Local Area Networks (WLAN), or a transmission resource provided by the secondary eNodeB.

Abstract: Embodiments of the present invention provide a random access method and an apparatus. PRACH configuration information of a base station is acquired, and a preamble is sent from a corresponding start PRACH resource, so that access of another terminal device is not affected when the base station identifies an access request of a terminal device that requires coverage enhancement. The solution includes: acquiring at least one group of physical random access channel PRACH configuration information that has been stored, where the at least one group of PRACH configuration information is carried in system information sent by the base station; parsing the at least one group of PRACH configuration information to obtain a corresponding start PRACH resource; and sending a preamble to the base station starting from the start PRACH resource, so that the base station establishes a connection to the terminal device according to the preamble.

Abstract: Embodiments of the present disclosure provide a TDD (time division duplex) uplink-downlink configuration acquiring method and apparatus, which relate to the field of communications systems, and can reduce system signaling overheads. The method includes: first sending, by a network-side node, physical downlink control signaling and a configuration message to user equipment, and then acquiring, by the user equipment, TDD uplink-downlink configurations separately corresponding to serving cells from at least one TDD uplink-downlink configuration command according to a correspondence between each serving cell of the serving cells of the user equipment and a location, in the physical downlink control signaling, of a corresponding TDD uplink-downlink configuration command. The embodiments of the present disclosure apply to a case that user equipment applies, for serving cells, TDD uplink-downlink configurations.

Abstract: Embodiments of the present invention disclose a random access method and an apparatus. According to the random access method disclosed in the embodiments, first downlink assignment information is obtained in a manner of a mapping relationship between first downlink assignment information and a preamble, where the first downlink assignment information is downlink assignment information used by a random access response message, and scheduling signaling of the random access response message does not need to be retransmitted by using the PDCCH channel, thereby resolving problems of a channel resource waste and an access delay in an existing random access method. The problems are caused because the PDCCH channel is used to retransmit the scheduling signaling of the random access response message.

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: 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 discloses a terminal, including a receiver and a processor. The receiver is used to receive a secondary carrier change instruction sent by a network device, where the secondary carrier change instruction carries feature information of a changed secondary carrier. The processor is used to: determine the changed secondary carrier according to the feature information of the changed secondary carrier; set, according to a required state for the changed secondary carrier, a state of the changed secondary carrier to the required state, where the required state for the changed secondary carrier comprises an activated state and a deactivated state; and determine synchronization information of the changed secondary carrier.