Abstract: A method and an apparatus are used to configure a position of a transmission frequency resource according to a synchronization relationship between devices, includes: adjusting, by a first device, synchronization according to synchronization information of a second device, in a case in which the first device is synchronous with the second device, or the second device can adjust a configured frequency resource, configuring a frequency resource close to an edge of a frequency band, where the frequency resource is used to transmit data, and notifying first user equipment; in a case in which the devices are synchronous, adjusting, by the first device and the second device, a start moment or an end moment of transmitting or receiving a signal; and using, by the first device in a manner of extending a bandwidth of a carrier frequency or a manner of carrier aggregation.

Abstract: Embodiments of the present invention provide a data transmission method and a data transmission device. The data transmission device includes: a detection unit, configured to detect a first signal in a first cell; a determining unit, configured to determine a reference time point according to a first sequence of the detected first signal, where the reference time point is located in a first subframe of the first cell; where the determining unit is further configured to determine a position of a data channel according to the determined reference time point; and a receiving unit, configured to receive, according to the position of the data channel, control data and/or service data carried on the data channel. According to the embodiments of the present invention, resource utilization can be improved.

Abstract: The present disclosure relates to example data transmission methods, user equipment, and access network devices in an LAA-LTE system. An example data receiving method includes determining, by user equipment, first information of a first cell. The user equipment determines a first subframe based on the first information, where a downlink data transmission length of the first subframe is less than a first threshold. The user equipment then determines a data transmission characteristic of the cell in the first subframe based on a preset condition, so as to receive, based on the data transmission characteristic, data including the first subframe. In doing so, a data transmission characteristic of a base station or a terminal is standardized, and a reference signal such as a DRS can be correctly identified.

Abstract: Embodiments provide an information transmission method, a base station, and user equipment, so as to properly use a spectrum. The method includes generating a first notification message, where the first notification message is used to instruct user equipment in a user equipment set to detect a common control channel of a first cell in the first cell, and sending the first notification message to the user equipment in the user equipment set by using a second cell. The method also includes sending the common control channel to the user equipment in the user equipment set by using the first cell.

Abstract: Embodiments of the present invention disclose a data transmission method, including: obtaining, by a first device, N orthogonal frequency division multiplexing (OFDM) symbols, where the N OFDM symbols are used to carry control information and data; and sending, by the first device, a first subframe and a second subframe to a second device, where the first subframe or the second subframe carries the control information, the first subframe includes M OFDM symbols of the N OFDM symbols, the second subframe includes K OFDM symbols of the N OFDM symbols, N is , a positive integer, M or K is zero or a positive integer, M is not greater than N, and K is not greater than N. The embodiments of the present invention further provide a first data transmission device.

Abstract: Embodiments of the present invention provide a network listening method and device, where the method includes: determining, by a first device according to a type of a network listening resource, a time-frequency pattern that is of a first sequence and is corresponding to the network listening resource of this type; and then transmitting the first sequence to a second device by using the time-frequency pattern of the first sequence, so that the second device performs network listening according to the first sequence. The time-frequency pattern of the first sequence determined in this process is a time-frequency pattern obtained by transforming a time-frequency pattern of a base sequence, and a network listening signal obtained therefrom, that is, the time-frequency pattern of the first sequence, is simple, which can achieve a purpose of reducing complexity of generating a network listening signal and computational complexity of parsing a network listening signal.

Abstract: Disclosed is a method and device for estimating weight of an object to be inspected in an inspection system. An effective atomic number and a high-energy gray value of the dual-energy corresponding to each pixel of the object to be inspected are obtained by a dual-energy radiation scanning. A mass-thickness value for a corresponding pixel is obtained from a pre-created mass-thickness attenuation curve by utilizing the effective atomic numbers and the high-energy gray value of the dual-energy for respective pixels. Weight information for at least a part of the object to be inspected is calculated by multiplying the mass-thickness value by the area of the pixel. Such a method may accurately calculate the weight of the object to be inspected and save the cost for a conventional weighing hardware.

Abstract: Disclosed is a dual-energy ray imaging method and system. The method comprises: calculating the mass thicknesses of the materials in the overlapped area of two materials by using a calibrated surface fitting method, and then decomposing a pair of original high-energy and low-energy data for this pixel into two high-low-energy data sets corresponding to the two materials, and finally calculating and acquiring the composition result of different materials for each pixel. The disclosure is especially advantageous in that the problem of error recognition of materials due to the two overlapped materials can be eliminated and the stratified imaging of multiple materials can be achieved, thereby improving the accuracy of the substance recognition and reducing the rate of false positive and false negative which is very important to the applications in the field of security check and anti-smuggling.

Abstract: A communication method includes receiving, by a terminal device, on an unlicensed frequency band, downlink control information sent by a network device, where the downlink control information is within a first time unit in a candidate time unit set of a plurality of candidate time unit sets, where the candidate time unit set is at least one of a plurality of consecutive time units, and wherein the candidate time unit sets are at equal intervals in the plurality of consecutive time units. The method further includes determining, by the terminal device according to a time at which the downlink control information is sent, a time window for sending uplink information, and sending, by the terminal device, the uplink information within the time window, where a start moment T1 of the time window is within the first time unit or a second time unit immediately after the first time unit.

Abstract: Provided is a dual-energy ray scanning system, which includes a ray source for alternately emitting a high energy ray and a low energy ray; a filter includes a low energy filtering element and a low energy transmitting element; a control device for synchronously controlling the ray source and the filter, and the low energy filtering element includes a plurality of filter sheets, the low energy transmitting element comprises a plurality of transmission sheets, the filter sheets and the transmission sheets are arranged alternately and surround the ray source to form a cavity, and the ray source is located on a central axis of the cavity.

Abstract: The present disclosure relates to example data transmission methods, user equipment, and access network devices in an LAA-LTE system. An example data receiving method includes determining, by user equipment, first information of a first cell. The user equipment determines a first subframe based on the first information, where a downlink data transmission length of the first subframe is less than a first threshold. The user equipment then determines a data transmission characteristic of the cell in the first subframe based on a preset condition, so as to receive, based on the data transmission characteristic, data including the first subframe. In doing so, a data transmission characteristic of a base station or a terminal is standardized, and a reference signal such as a DRS can be correctly identified.

Abstract: Embodiments of the present invention provide an uplink control channel sending method, an uplink control channel receiving method, and an apparatus. The sending method includes: receiving, by terminal device, downlink data from a network device in each subframe in a first subframe set; obtaining, by the terminal device, first downlink control information from the network device; and sending, by the terminal device, a target physical uplink control channel in a first uplink subframe according to an indication of the first downlink control information.

Abstract: Embodiments of the present invention provide an uplink information transmission method, a related device, and a communications system. The method includes: receiving, by a terminal device, uplink scheduling information sent by an access network device; determining, by the terminal device based on aperiodic channel state indication information and modulation and coding indication information that are included in the uplink scheduling information, whether to transmit feedback information on an uplink resource indicated by the uplink scheduling information; and if determining to transmit the feedback information on the uplink resource, transmitting, by the terminal device, the feedback information on the uplink resource.

Abstract: The method disclosed in present embodiments includes: a terminal device receives downlink data in at least one downlink burst; determines that a first downlink subframe set is associated with a first uplink subframe, where the first downlink subframe set belongs to the at least one downlink burst, the first uplink subframe is used to send first feedback information corresponding to the first downlink subframe set, the first uplink subframe is in a first uplink burst, and the first uplink burst follows the at least one downlink burst; determines a first feedback information codebook, and determines the first feedback information based on the codebook; determines a first uplink channel in the first uplink subframe; and sends the first feedback information to the access network device on the first uplink channel. According to the method, the terminal device can properly sends ACK/NACK feedback information in a U-LTE scenario.

Abstract: A method for transmitting uplink control information includes: receiving, by a terminal device, scheduling information and trigger information from an access network device, where the scheduling information is used to instruct the terminal device to transmit, in M uplink subframes, uplink data scheduled by the scheduling information, M is a positive integer not less than 2, and the trigger information is used to instruct the terminal device to send uplink control information; determining, by the terminal device, in the M uplink subframes, an uplink subframe for carrying the uplink control information, where the determined uplink subframe is a subframe other than a first subframe in the M uplink subframes, and the first subframe is a first uplink subframe in the M uplink subframes; and sending, by the terminal device, the uplink control information in the determined uplink subframe.

Abstract: A data transmission method and a communications device resolve an existing problem that use of an unlicensed spectrum is interfered with between LTE devices when a padding is sent. The method includes: performing, by a communications device, CCA on an unlicensed spectrum; and when determining that the unlicensed spectrum is in an idle state, sending, by the communications device on a preset band resource in the unlicensed spectrum, a signal indicating that the communications device uses the unlicensed spectrum, where the preset band resource is a partial band resource in the unlicensed spectrum. Mutual interference between communications devices when the unlicensed spectrum is used is eliminated.

Abstract: In an uplink information sending method, a terminal device receives scheduling information sent by an access network device in a first time unit. The terminal device determines a second time unit and a first time offset. The second time unit is after the first time unit, and the second time unit carries downlink information sent by the access network device. The terminal device further determines a third time unit. The third time unit is a time unit that is offset from the second time unit by the first time offset. Further, the terminal device sends first uplink information scheduled by using the scheduling information in the third time unit. In this way, information transmission flexibility and reliability can be improved.

Abstract: The present disclosure provides a method and an apparatus for transmitting control data. The method includes: determining, by a terminal device, at least one target cell from at least one unlicensed cell; and transmitting, by the terminal device, control data in the target cell. This can implement transmission of the control data on an unlicensed spectrum resource, so that the control data can be transmitted not merely on a licensed spectrum resource, and communication reliability and user experience can be improved. In addition, this can reduce licensed spectrum resource overheads in a communication process, and increase a capacity of a communications system that has a limited quantity of licensed spectrum resources.

Abstract: The present disclosure relates to example data transmission methods, user equipment, and access network devices in an LAA-LTE system. An example data receiving method includes determining, by user equipment, first information of a first cell. The user equipment determines a first subframe based on the first information, where a downlink data transmission length of the first subframe is less than a first threshold. The user equipment then determines a data transmission characteristic of the cell in the first subframe based on a preset condition, so as to receive, based on the data transmission characteristic, data including the first subframe. In doing so, a data transmission characteristic of a base station or a terminal is standardized, and a reference signal such as a DRS can be correctly identified.

Abstract: A method and device for sending a synchronization signal and a method and device for synchronization between base stations, include: determining, by a synchronization source base station according to a synchronization level of the synchronization source base station, a resource for sending an NLRS for clock synchronization between base stations, and according to the determined resource. In this way, one NLRS for clock synchronization between base stations is configured on each synchronization source base station, and the NLRS is sent on a resource determined according to a synchronization level, so that a synchronization base station that acquires the NLRS can determine the synchronization level of the synchronization source base station according to a resource for sending the NLRS.