Abstract: A communication control method includes, in response to communication between a first mobile platform and a first controller via a first communication link, obtaining one or more broadcast signals received by the first mobile platform within a predetermined time range, determining an in-range platform quantity of the second mobile platforms present in a predetermined range of the first mobile platform according to signal information of each of the one or more broadcast signals, and determining a strategy for selecting a frequency to be used by the first mobile platform when communicating with the first controller via the first communication link according to the in-range platform quantity. The one or more broadcast signals are sent by a second mobile platform.

Abstract: A method for monitoring an unmanned aerial vehicle (UAV) includes a processor obtaining a datagram based on monitoring data for a UAV-detector communication between the UAV and one or more detectors. The monitoring data indicates at least one of a location of the UAV or a location of a control station in communication with the UAV. The method further includes determining a risk level by retrieving pre-stored risk information associated with the UAV based on the datagram.

Abstract: A method for monitoring an unmanned aerial vehicle (UAV) includes a processor generating a datagram based on monitoring data for a UAV-detector communication between the UAV and one or more detectors. The monitoring data indicates at least one of a location of the UAV or a location of a control station in communication with the UAV. The method further includes the processor encrypting working data for a UAV-control station communication between the UAV and the control station using an encryption key known to the control station but now known to the one or more detectors, and a transmitter transmitting the datagram along with encrypted working data. The datagram is to be received by the one or more detectors and the encrypted working data is to be received and deciphered by the control station using the encryption key.

Abstract: Systems and methods for synchronizing communications between a movable object and first and second control devices are provided. In some exemplary implementations, the systems and methods may synchronize the first control device with the movable object, synchronize the second control device with the first control device, and synchronize the second control device with the movable object based on the synchronization between the second control device and the first control device.

Abstract: An out-of-synchronization processing method implemented in an intermediate communication apparatus includes obtaining synchronization information for synchronizing with a downstream communication apparatus, and performing a search for an upstream communication apparatus and a communication with the downstream communication apparatus. A parameter is adjusted according to the synchronization information during the communication with the downstream communication apparatus.

Abstract: A lane detection method includes obtaining visual detection data via a vision sensor disposed at a movable platform, performing lane line analysis and processing based on the visual detection data to obtain lane line parameters, obtaining radar detection data via a radar sensor disposed at the movable platform, performing boundary line analysis and processing based on the radar detection data to obtain boundary line parameters, and performing data fusion according to the lane line parameters and the boundary line parameters to obtain lane detection parameters.

Abstract: A monitoring information broadcasting method includes determining a series of transmission sessions aligned to a system time of a mobile platform. Each transmission session includes a first time period and a second time period. The first time period includes a plurality of first time slices and the second time period includes a plurality of second time slices. The method further includes performing one of broadcasting a data packet of a first type during a first active slice among the first time slices in the first time period of one of the transmission sessions or broadcasting a data packet of a second type during a second active slice among the second time slices in the second time period of the one of the transmission sessions.

Abstract: A method for monitoring an unmanned aerial vehicle (UAV) includes a processor generating a datagram based on monitoring data for a UAV-detector communication between the UAV and one or more detectors. The monitoring data indicates at least one of a location of the UAV or a location of a control station in communication with the UAV. The method further includes the processor encrypting working data for a UAV-control station communication between the UAV and the control station using an encryption key known to the control station but now known to the one or more detectors, and a transmitter transmitting the datagram along with encrypted working data. The datagram is to be received by the one or more detectors and the encrypted working data is to be received and deciphered by the control station using the encryption key.

Abstract: The present invention provides a method for monitoring an unmanned aerial vehicle (UAV). The method may comprise: generating, with aid of one or more processors, a datagram comprising monitoring data indicating at least one of: a location of the UAV or a location of a control station in communication with the UAV; and transmitting the datagram along with working data for communication between the UAV and the control station such that datagram can be received by the one or more detectors within a range of the UAV.

Abstract: An out-of-synchronization processing method implemented by a first unmanned aerial vehicle (UAV) includes determining whether the first UAV is out of synchronization, obtaining base positioning information of a base station broadcasted by a second UAV in response to confirming that the first UAV is out of synchronization, and determining UAV positioning information of the first UAV based on the base positioning information. The first UAV and the second UAV belong to a UAV system including the base station and at least two UAVs.

Abstract: An out-of-synchronization processing method implemented in an intermediate communication apparatus includes obtaining synchronization information for synchronizing with a downstream communication apparatus, and performing a search for an upstream communication apparatus and a communication with the downstream communication apparatus. A parameter is adjusted according to the synchronization information during the communication with the downstream communication apparatus.

Abstract: A method of controlling a transmission power of a first node configured to communicate wirelessly with one or more other nodes is described. The method may include establishing a first wireless communication link between the first node and a second node, receiving a first power adjustment value from the second node, wherein the first power adjustment value is determined based on signals transmitted by the first node over the first wireless communication link, determining a transmission power level for transmitting signals from the first node based on the received first power adjustment value, and transmitting signals from the first node over the first wireless communication link using the determined transmission power level.

Abstract: A monitoring information broadcasting method includes determining a series of transmission sessions aligned to a system time of a mobile platform. Each transmission session includes a first time period and a second time period. The first time period includes a plurality of first time slices and the second time period includes a plurality of second time slices. The method further includes performing one of broadcasting a data packet of a first type during a first active slice among the first time slices in the first time period of one of the transmission sessions or broadcasting a data packet of a second type during a second active slice among the second time slices in the second time period of the one of the transmission sessions.

Abstract: Systems and methods for synchronizing communications between a movable object and first and second control devices are provided. In some exemplary implementations, the systems and methods may synchronize the first control device with the movable object, synchronize the second control device with the first control device, and synchronize the second control device with the movable object based on the synchronization between the second control device and the first control device.

Abstract: A method is provided for controlling a movable platform. The method includes determining whether the movable platform is capable of broadcasting information indicating a relevant parameter of the movable platform. The method also includes restricting a movement of the movable platform based on a determination that the movable platform is not capable of broadcasting the information.

Abstract: Embodiments of the present invention provide a channel state information (CSI) feedback method and apparatus, user equipment, and a base station. The method, performed by a user equipment device, includes: pre-synchronizing, between the user equipment device and a base station, a basis matrix that includes sparsity of CSI in a frequency domain and a space domain; receiving pilot information from the base station; determining, according to the pilot information, a CSI information matrix that includes information about the frequency domain and the space domain of CSI; determining the data by using the CSI information matrix; and feeding back the data to the base station, so that the base station restores the corresponding CSI information from the data by using the basis matrix.

Abstract: Interference alignment for a multiple-input multiple-output communications network with partial connectivity is provided. A method is provided that includes determining assignments for data streams transmitted in the multiple-input multiple-output communications network. The method also includes suppressing inter-cell interference and suppressing intra-cell interference. Also provided is inter-cell/intra-cell decomposition and exploitation of partial connectivity in a multiple-input multiple-output communications network. The multiple-input multiple-output communications network can comprise three or more cells.

Abstract: The present invention provides a method for monitoring an unmanned aerial vehicle (UAV). The method may comprise: generating, with aid of one or more processors, a datagram comprising monitoring data indicating at least one of: a location of the UAV or a location of a control station in communication with the UAV; and transmitting the datagram along with working data for communication between the UAV and the control station such that datagram can be received by the one or more detectors within a range of the UAV.

Abstract: The present invention provides a channel measurement method, a channel measurement apparatus, user equipment. A wireless communications system includes a channel measurement apparatus and at least two user equipments. The method includes: sending, by the channel measurement apparatus, an antenna domain training sequence to the at least two user equipments; receiving, by the channel measurement apparatus, channel response measurement sequences sent by the at least two user equipments, where the channel response measurement sequences are sequences that are obtained after the antenna domain training sequence passes through channels and that are received by the at least two user equipments; and performing, by the channel measurement apparatus, joint processing on the received channel response measurement sequences of the at least two user equipments to obtain downlink channel state information CSIT.

Abstract: Channel state information (CSI) is reduced for a multi input multi output (MIMO) channel, in which feeding back a part of the CSI matrix is sufficient to align interference in a MIMO network. A feedback dimension quantifies a cost of the CSI feedback of the interference in the MIMO network. A feedback profile is determined that achieves a tradeoff between degrees of freedom, antenna resources and the cost of the feedback. The feedback profile parameterizes a feedback function, which determines how the CSI matrices are fed back to the transmitter. The precoders of the network are adaptive to only the partial CSI knowledge at the transmitter.