Abstract:
A method and an apparatus for aligning antenna beams in a high-low frequency co-site network, where the method includes performing antenna alignment of a low frequency beam with a communications device in order to establish a low frequency channel, and performing high frequency beam alignment of a high frequency antenna with the communications device using the low frequency channel. In the method, high frequency beam alignment of a high frequency antenna is performed using an established low frequency channel. Therefore, a technical problem that a high frequency beam alignment time of a high frequency antenna is long due to a narrow field of view of a high frequency beam can be avoided in order to quickly implement high frequency beam alignment of a high frequency antenna.
Abstract:
Embodiments of the present disclosure provide a signal synchronization method and apparatus for high frequency communication, and pertain to the field of wireless communications technologies. The method includes: performing, on a first beam pair, high frequency data communication with user equipment; if it is determined that the user equipment enters a dead zone state, sending a synchronization indication signal to the user equipment, where the synchronization indication signal includes at least quick synchronization indication information and user equipment information, and the user equipment information includes user ID information, beam ID information of a beam pair, and cell ID information; sending, on a specified high frequency resource, a synchronization signal to the user equipment. In the present disclosure, high frequency data communication is implemented by quickly performing re-synchronization in a dead zone state. Therefore, communication service quality is relatively high.
Abstract:
A method and an apparatus for transmitting control information are disclosed. The method includes: grouping UEs in a cell, and obtaining second control information of each UE group after grouping; performing joint channel coding on the second control information of each UE group; obtaining first control information, and transmitting the first control information to the UEs in the cell, where the first control information includes indication information of the second control information, on which joint channel coding has been performed, of each UE group, so as to obtain the second control information according to the indication information; and transmitting the second control information, on which joint channel coding has been performed, of each UE group to the UEs in the cell.
Abstract:
Embodiments of the present invention provide a method and device for transmitting signal. The method includes: obtaining a downlink beamforming matrix; and using a conjugate transposed matrix of the downlink beamforming matrix as an uplink beamforming matrix for processing uplink signal. In the embodiments of the present invention, the conjugate transposed matrix of the downlink beamforming matrix may be used as the uplink beamforming matrix for processing uplink signal, which can simplify design of the uplink beamforming matrix and thereby reduce complexity of the system.
Abstract:
A communication method, apparatus, and system is described. The communication method includes sending, by a cellular base station, measurement indication information to a millimeter wave base station and a user equipment, acquiring, by the cellular base station, the measurement result, determining a to-be-accessed millimeter wave base station of the user equipment according to the measurement result, and sending, by the cellular base station, millimeter wave frequency band parameter configuration information of the to-be-accessed millimeter wave base station to the user equipment.
Abstract:
The present invention provides a synchronization method of user equipment and user equipment, where the method includes: when the user equipment accesses a millimeter-wave band network, performing first synchronization in a cellular band by using a cellular band network that covers the millimeter-wave band network; and performing second synchronization in a millimeter-wave band by using the millimeter-wave band network. In the present invention, after the first synchronization in the cellular band is performed, the second synchronization in the millimeter-wave band is performed by using the millimeter-wave band network, which avoids a case in which the user equipment acquires a PSS in a PSS synchronization window that slides in the millimeter-wave band for a long time, thereby reducing overheads, narrowing a range of the synchronization window, and accelerating detection of a PSS in the millimeter-wave band, so that the user equipment quickly and accurately performs synchronization in the millimeter-wave band.
Abstract:
The present invention provides a signal transmission method for a multiple-user multiple-input multiple-output system, includes: in a signal sending time slot, sending a signal to user terminals through each antenna via preset subcarriers in a signal sending time slot; sending a first public information signal to the user terminals through each antenna via the preset subcarriers in a public information sending time slot. According to the technical solution provided by the present invention, the problem that signal transmission delay of a multiple-user multiple-input multiple-output system where a channel changes rapidly is too long is solved.
Abstract:
Embodiments of the present invention provide a method and an apparatus for adjusting a network configuration, and the method includes: receiving requirement information sent by a terminal device (UE), where the requirement information includes electricity-saving request information of the UE or a maximum transmit power of the UE; acquiring a mapping relationship corresponding to the requirement information, where the mapping relationship is a correspondence between requirement information and a service mode; acquiring service mode information according to the mapping relationship and sending the service mode information to the UE, so that the UE acquires selection information according to the service mode information; and receiving the selection information sent by the UE and modifying a configuration of a network device according to a service mode corresponding to the selection information, where the selection information corresponds to a service mode in the service mode information.
Abstract:
The present invention provides a multi-antenna diversity scheduling method and apparatus. The method includes: transmitting pilot signals through x transmit antennas, where pilot signals on 1 to x−1 transmit antennas are a product of pilot symbols and a phase sequence, the phase sequence changes with at least one of time and frequency, the phase sequence changes more frequently than a user channel, and x is a positive integer greater than or equal to 2; receiving a transient channel quality information (CQI) value returned by a user according to the pilot signals; and according to the CQI value and a scheduling algorithm, scheduling the user to transmit data.
Abstract:
Embodiments of the present invention provide a communication method, an apparatus, and a system for a distributed antenna system, and relate to the field of communications technologies. The communication method includes: receiving, by a receiving device, a measurement reference signal corresponding to an antenna cluster in a cell, where all antennas in the cell are divided into at least one antenna cluster, and each antenna cluster includes at least one antenna and has a corresponding cluster identifier; obtaining channel information corresponding to the antenna cluster according to the measurement reference signal; and transmitting the cluster identifier and the channel information corresponding to the antenna cluster to a central processing device, so that the central processing device determines the antenna cluster serving the receiving device according to the cluster identifier and the channel information corresponding to the antenna cluster.