A method of transmitting a message from a sender (101) to a receiver (102) is provided, wherein the communication between the sender (101) and receiver (102) is performed using a hybrid automatic-repeat-request (HARQ) protocol. Artificial noise is added digitally to a first data packet in order to trigger transmission of a second data packet. Corresponding artificial noise is added digitally to the second data packet such that the receiver device (102) can process the data packets together to remove the introduced artificial noise and extract the desired message. Also disclosed are methods where artificial noise is added to a predetermined set of plural data packets in a similar fashion.

A method for combining log data generated by an appliance associated with an aircraft with flight data is disclosed. The method includes receiving an automatic dependent surveillance-broadcast (ADS-B) signal, wherein the ADS-B signal is received by a communication module communicatively coupled to the appliance. The method includes processing the ADS-B signal into a digitized data signal and correlating the digitized data signal with the log data. The method further includes combining the ADS-B data signal into the log data to create a combined data and correlating the combined data with chronological data, wherein the combined data is timestamped based on the chronological data. A system is also disclosed. The system includes an appliance configured for use in an aircraft. The system further includes a communication module communicatively coupled to the appliance configured to receive automatic dependent surveillance-broadcast (ADS-B) signals from the aircraft and send ADS-B data to the appliance.

Systems, methods, and instrumentalities are disclosed for processing a multi-level transmission sent on a common set of resources using superposition coding, comprising determining a first group radio network temporary identifier (GRNTI), wherein the GRNTI is associated with a broadcast transmission to a plurality of wireless transmit/receive units (WTRUs), determining a second GRNTI, wherein the second GRNTI is associated with a transmission to a subset of the plurality of WTRUs that received the first GRNTI, receiving the multi-level transmission, wherein the multi-level transmission comprises a first level message and a second level message, decoding the first level message from the multi-level transmission using the first GRNTI and preconfigured control information, and decoding the second level message from the multi-level transmission using the second GRNTI.

A vehicle communication system including a communication management unit (CMU) and a data gateway is provided. The CMU is at least in part configured to route first type messages using a first type message communication. The data gateway is configured to communicate second type messages to a remote location. The CMU is configured to route at least some of the first type messages to the data gateway. The data gateway is configured to communicate a pseudo acknowledgment for each message block of each first type message routed to the data gateway back to the CMU indicating the message block was received by a designated remote location. The data gateway is further configured to interface each received first type message into the second type message and communicate each second type message to the designated remote location using a second type of message communication.

A method includes establishing a first wireless connection between a movable object and a first remote control device, and establishing a second wireless connection between the movable object and at least one second remote control device. The method also includes selecting, based on a determination that the first wireless connection is normal, a first control signal received from the first remote control device to control the movable object. The method further includes selecting, based on a determination that the first wireless connection is abnormal and that the second wireless connection is normal, a second control signal received from the at least one second remote control device to control the movable object.

An unmanned aerial vehicle (UAV) receives a set of Random Access preambles, determines its UAV status, and selects a Random Access preamble from the set of Random Access preambles. In some cases, the set of Random Access preambles are allocated for use by UAVs and are common to a plurality of neighboring cells. The UAV transmits the selected Random Access preamble to multiple neighboring cells. One of the neighboring cells that received the selected Random Access preamble transmits a Random Access Response to the UAV. The UAV determines which cell sent the Random Access Response, reselects to the cell that sent the Random Access Response, and transmits a Radio Resource Control (RRC) Connection Establishment Request to the reselected cell. Upon completion of a Random Access Channel (RACH) procedure, the reselected cell becomes the serving cell for the UAV.

Systems and methods for automated communication with Air Traffic Control. The system comprises a processor and memory. The memory stores instructions to execute a method. The method includes receiving audio communication input from an air traffic controller (ATC). The audio communication input is then converted into text input. Next, an aircraft keyword is detected in the text input. The text input is then parsed and one or more data structures are generated from the parsed input. In some examples, the one or more data structures includes command data for controlling the aircraft. Next, the command data in the one or more data structures is verified. The one or more data structures are then transmitted to an onboard flight computer of the aircraft. Last, the one or more data structures are stored in a conversation memory.

A highly sensitive RADAR system comprising a plurality of ground stations, where each ground station includes a plurality of ground-based directional antennae, each ground-based directional antenna having a beam width associated with a particular area of the sky above the ground station and, for each ground-based directional antenna, a least one software defined radio is coupled to the directional antenna in such a manner as to enable the ground-based directional antenna to transmit radfrequency signals generated by the software defined radio at one or more frequencies and to provide to the software defined radfrequency signals received by the ground-based directional antenna at one or more frequencies; and where each of a plurality of the ground stations is configured to transmit a radfrequency signal into a specific defined area of space in such a manner that the various transmitted radio signals will arrive in the defined area of space at substantially the same time; and wherein, each of the plurality of ground stations are further configured to detect reflected radio signals from an object within the defined area of space; and wherein the system further includes a processor for processing any reflected signals received by is the plurality of ground stations to identify the presence of objects within the defined space.

A first beam is implemented, from a set of vehicle-based antennas, for current or future communication with a ground-based or satellite-based network via an external antenna (e.g., of a base station or satellite). A second beam may be implemented to detect or determine a better pointing angle for the first beam, thereby “fine tuning” the pointing angle for the first beam. Specifically, the second beam may be “swept” through a range of pointing angles while a signal parameter representing signal quality or strength is measured, detected, or calculated at each pointing angle. The values for the signal parameter may be evaluated to identify a desired value and the pointing angle at which the desired value was obtained. The first beam may be reoriented or repointed at the desired pointing angle, and one or more nodes of vehicle-based communication system may communicate with an external network via the first beam.

An antenna system for an unmanned aerial vehicle (UAV) includes one or more antennas, a reflector, and a control system. The control system is configured to determine a density of antenna towers near the UAV, determine a position for an active antenna of the one or more antennas based on the density, and adjust the active antenna to the determined position. In some embodiments, the antenna system further includes one or more switches, each of the one or more antennas is a different distance from the reflector, and the switches are used to adjust the active antenna to the determined position by selecting a one of the one or more antennas closest to the determined position as the active antenna. In some embodiments, the antenna system further includes an actuator and the active antenna is moved to the determined position using the actuator.