An optical switch with a plurality of actuators includes a controller configured to control the operation of a plurality of channels, where each channel has at least one electrical driver and at least one actuator, by interleaving periods of voltage switching output with periods of no voltage switching output for one or more drivers whilst the output voltage is switching from one level to another level. Alternatively, an optical switch with a plurality of actuators comprises a controller configured to control the operation of a plurality of channels, where each channel has at least one electrical driver and at least one actuator, by switching the output voltage from one level to another level for at least one driver of a first channel whilst at least one oilier driver of at least one other channel is in a relatively high impedance mode.

A monitoring terminal includes a transceiver, a receiver, and a processor. The transceiver provides a two-way communication with an unmanned aerial vehicle (UAV) via a first communication link and is configured to receive feedback data and a feedback data indication from the UAV and transmit control data to the UAV. The receiver is configured to receive the control data and a control data indication from a controlling terminal via a second communication link. The second communication link does not interfere with the first communication link. The processor is configured to determine whether the feedback data and the control data are being simultaneously transmitted via the first communication link based on the feedback data indication and the control data indication.

This application provides a method for determining a reference signal sequence, a terminal device, and a network device. The method includes: receiving, by a terminal device, first indication information sent by a network device; determining, by the terminal device, a target resource based on the first indication information; determining, by the terminal device, a reference signal sequence based on parameters of a first bandwidth and parameters of a second bandwidth; and sending or receiving, by the terminal device, the reference signal sequence on the target resource. Based on the method for determining a reference signal sequence provided in this application, the reference signal sequence can be determined based on the parameters of the first bandwidth and the parameters of the second bandwidth.

A user terminal apparatus is disclosed that is able to communicate with a base station apparatus in a given radio access scheme and detects the base station apparatus and/or a different communication apparatus from the base station apparatus, the user terminal including: a receiving circuit that receives signals from the base station apparatus and/or the communication apparatus, in the given radio access scheme, using subframes of a given demodulation reference signal configuration; and a transmission circuit that transmits signals to the base station apparatus and/or the communication apparatus, in a same radio access scheme as the given radio access scheme, using subframes of a same demodulation reference signal configuration as the given demodulation reference signal configuration.

According to some embodiments, a method performed by a network node (115A) for providing interference mitigation assistance to a wireless device (110C) includes associating demodulation reference signal (DMRS) sequence information with at least one transmission parameter that applies to the DMRS sequence information. An indication of the association of the DRMS sequence information with the at least one transmission parameter is transmitted to the wireless device (110C) for use in performing mitigation of an interfering signal from a first transmission point (115A or 115B).

Certain aspects of the present disclosure provide techniques for interference mitigation. An exemplary method performed by a base station generally includes determining, based on a location of another base station and information regarding the other base station, that the other base station is likely to experience interference while receiving an uplink transmission due to a downlink transmission by the base station and forming a null in a beam of the downlink transmission in a direction matching the location of the other base station.

To facilitate spatial sharing, signaling may be used. A first node may receive one or more frame exchanges between a second node and a third node, wherein the second node is associate with the third node. The first node may then detect a spatial sharing scenario (SSS) with an overlapping basic service set (BSS) based on the received one or more frame exchanges. Also, the first node may transmit a directional poll request to at least a fourth node associated with the first node based on the detected SSS, and thereby null directional transmissions associated with the second node, the third node or both. The first node may then receive a direction poll response from the fourth node. Further, the first node may transmit one or more directional, beamformed transmissions to the fourth node simultaneously with directional, beamformed transmissions by the second node to the third node.

Embodiments of the present invention disclose an interference suppression method and a related device and system. The method includes: sending, on a specified time-frequency resource, a first reference signal or a first reference signal group to an interfered-with end; receiving interfering source information sent by the interfered-with end, where the interfering source information includes an interference identifier used for indicating whether a potential interfering source causes interference to the interfered-with end; and if the interference identifier in the interfering source information indicates that the potential interfering source sending the reference signal on the specified time-frequency resource causes interference to the interfered-with end, determining that the potential interfering source is an interfering source, otherwise, determining that the potential interfering source is a non-interfering source. According to the present invention, mutual interference between uplink and downlink signals of terminals located in a same cell or different cells can be suppressed.

A method that incorporates aspects of the subject disclosure may include, for example, obtaining, by a system comprising a processor, interference information associated with one or more physical resource blocks (PRBs) from each base station of a plurality of base stations. Further, the method can include determining, by the system, from the interference information a strategy for improving a PRB utilization of a first base station of the plurality of base stations. In addition, the method can include conveying, by the system, the strategy to at least one base station of the plurality of base stations. Other embodiments are disclosed.

The disclosure provides for interference mitigation for wireless signals in unlicensed spectrum. A wireless device may receive a combined signal including a first radio access technology (RAT) signal and a second RAT signal. The wireless device may generate, using a first RAT receiver in a first processing path, a channel estimate for the first RAT signal based on a previously decoded signal of the first RAT. The wireless device may reduce interference to the second RAT signal caused by the first RAT signal, in a second processing path, using the channel estimate. The wireless device may further decode the second RAT signal. The wireless device may remodulate the decoded signal using a transmitter to generate a remodulated second RAT signal. The remodulated second RAT signal may be canceled from the combined signal. The wireless device may decode a remaining portion of the combined signal including the first RAT signal.