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:
A base band unit, BBU, in a wireless cellular heterogeneous network, the BBU being provided in a transmission node cluster, TNC, of transmission nodes, TNs, of neighboring cells of the wireless cellular heterogeneous network, wherein the BBU comprises generic hierarchical precoding codebooks, CBs, each CB comprising cluster precoding matrices, CPMs, and each CPM is provided for a possible combination of active TNs within the TNC.
Abstract:
A data transmission method and apparatus are provided, which can improve a throughput rate of a system, and improve data transmission performance and user experience. The method comprises determining a target bit sequence. In the system state, a peak-to-average power ratio PAPR corresponding to the target bit sequence is less than a PAPR that corresponds to a bit sequence corresponding to the data length of the target data. The method comprises adding the target bit sequence to length bits that are in a legacy signal field of a target preamble, and performing transmit power enhancement processing on a legacy short training field, a legacy long training field, and the legacy signal field that are in the target preamble according to the transmit power amplification limit.
Abstract:
Embodiments disclose a scheduling method. The method includes sending, by an access point, a scheduling request to a first scheduling server according to a data transmission requirement, where the scheduling request includes frequency band bandwidth information of a contention frequency band that is applied for and frequency band use time information of the contention frequency band that is applied for. The method also includes receiving, by the access point, a contention frequency band that is allocated by the first scheduling server to the access point according to a spectrum list and the scheduling request, where the spectrum list includes at least frequency band use information and interference information of the access point. The method also includes performing, by the access point, scheduling transmission by using the allocated contention frequency band.
Abstract:
The present invention provides a method and an apparatus for transmitting data using a codebook. The method includes: receiving current antenna configuration information of a transmitting end; obtaining a mask matrix corresponding to the current antenna configuration according to the current antenna configuration information; generating a codebook corresponding to the current antenna configuration according to a mother codebook and the mask matrix; selecting one codebook element from the codebook, and transmitting indication information corresponding to the codebook element to the transmitting end; and receiving data transmitted by the transmitting end. In the embodiments of the present invention, a mask matrix is obtained according to current antenna configuration information, and a codebook is generated according to the mask matrix and a mother codebook that is corresponding to the maximum number of antennas and the maximum number of layers that are fed back through channel state information.
Abstract:
Embodiments of the present invention disclose a path loss compensation method, a base station, and a user equipment to implement calculation for path loss compensation. The method in an embodiment of the present invention includes: obtaining, by a base station, power parameters of a macro site and an RRH in a cell where a UE is located; calculating, by the base station, a path loss adjustment factor for the UE according to the power parameters, where the path loss adjustment factor is an adjustment parameter used by the base station to compensate for an uplink transmit power of the UE; and sending, by the base station, the path loss adjustment factor to the UE, so that the UE can calculate the uplink transmit power according to the path loss adjustment factor.
Abstract:
This application provides a communication method and apparatus in a high-frequency scenario. The method includes: A transmit-end device may modulate S bitstreams according to a mapping rule corresponding to a first modulation scheme for a higher-order modulation signal to be received by a receive-end device, to generate M lower-order modulation signals, where S is equal to 1 or M, and M is an integer greater than or equal to 2; and then send the M lower-order modulation signals through a line of sight LOS channel, so that a modulation order of a signal transmitted by a transmit end can be reduced.
Abstract:
Embodiments of the present invention relate to the field of wireless communication, and in particular, to a wireless local area network data transmission method and apparatus, which are used for improving data transmission efficiency. The method of the embodiments of the present invention includes: carrying, by a control domain of a PLCP header domain in a PPDU constructed by an AP, identifier information of the AP, duration information, and an identifier of at least one STA, so that a STA may obtain the identifier information of the AP, the duration information, and the identifier of at least one STA by parsing only the control domain of the PLCP header domain.
Abstract:
An initial signal detection method includes performing, by a user equipment, detection on one or more sub-channels on an unlicensed spectrum, and determining, based on a combination of a group common-demodulation reference signal and a group common-physical downlink control channel that is detected by the user equipment a first time, that downlink transmission has started or that a channel occupancy time has started.
Abstract:
Method and devices are provided for a channel access mechanism for accessing a network on a random access channel (RACH). Methods involve defining a listen-before-talk (LBT) category to be used as part of a contention based procedure and how a contention window that is part of the LBT can be dynamically adjusted.