Abstract: A multi-carrier aggregation method and apparatus, user equipment, and a network side device are disclosed. The method includes: determining, by a network side device according to information about a transmission resource that is obtained when at least one component carrier is successfully obtained through contention, start and end times of a scheduling phase corresponding to the at least one component carrier, where the scheduling phase is divided by an uplink-downlink switch point into an uplink phase of the scheduling phase and a downlink phase of the scheduling phase, the uplink-downlink switch point is used to divide a time to obtain an uplink time of the component carrier and a downlink time of the component carrier, and uplink-downlink switch points of two or more component carriers are aligned in time; and performing, by the network side device, downlink transmission with user equipment in the downlink phase of the scheduling phase.

Abstract: The present disclosure provides a data transmission method and device. The method includes sensing, by a station, whether a channel allocated by an access point associated with the station is occupied, before obtaining a downlink scheduling phase. If the channel is not occupied, sending, by the station, channel clear signaling to the access point, where the channel clear signaling includes a first identifier used for identifying the station and a second identifier used for identifying the access point. The method also includes receiving, by the station in the downlink scheduling phase, data transmitted by the access point. The present disclosure ensures normal data transmission.

Abstract: Embodiments of the present invention provide an information sending method and apparatus. The information sending method in the present invention includes: performing, by a transmit station, channel contention; sending, by the transmit station, indication information after successfully obtaining a channel through contention, where the indication information is used for indicating that a receive station cannot actively initiate data transmission in at least two discontinuous time periods; and sending, by the transmit station, data in the at least two discontinuous time periods. According to the embodiments of the present invention, multiple discontinuous time periods are flexibly reserved in some discontinuous data transmission scenarios, and channel resources are saved.

Abstract: A data transmission method and a data transmission device are disclosed. The method comprises: sending, by a transmitting end, a channel request frame to a first receiving end on at least two sub-channels; parsing, by a receiving end after receiving a channel response frame from the first receiving end, the channel response frame to obtain second channel indication information; determining that the sub-channel on which the channel response frame is transmitted is idle; and sending data to the first receiving end on the sub-channel that is determined to be idle.

Abstract: Embodiments of the present invention provide a method and an apparatus for transmitting signaling. The method includes: modulating, by using a binary phase shift keying BPSK manner of rotation by a first angle, at least partial signaling information carried in at least one signaling symbol in a signaling field of a data packet, to obtain modulated signaling information, where the first angle is not equal to 0 degrees or 90 degrees; and sending, to a receive end, the data packet that carries the modulated signaling information. In the embodiments of the present invention, the signaling field of the data packet is modulated by using a modulation manner different from a conventional modulation manner, so that a data packet format corresponding to such a modulation manner can be distinguished from a conventional data packet format.

Abstract: A method for adjusting a timing advance includes: sending an uplink message to an access point, AP, and receiving a downlink message returned by the AP; according to the moment when the uplink message is sent, the moment when the downlink message returned by the AP is received and the fixed time when the downlink message is returned by the AP, obtaining time alignment information; and according to the time alignment information, adjusting the amount of time by which a signal is sent in advance.