Motorola Solutions, Inc.

Motorola Corporation

Gogo LLC

Gogo Business Aviation LLC

Motorola Mobility LLC

Michael H Baker

James P Michels

Yong Liu

Heinz A Miranda

Xiaowei Jin

Nitin R Mangalvedhe

Jeffrey D Bonta

Paul H Gailus

William J Turney

Isam Robert Makhlouf

Nathan J Smith

George Calcev

Lawrence F Cygan

Gino Anthony Scribano

Brundaban Sahoo

Timothy J Wilson

Stephen P Emeott

Aparna Pandey

Floyd D Simpson

Brian Keith Smith

Benedito J Fonseca, Jr

David H Minasi

Mark Shahaf

John K Grosspietsch

Ethan Y Chen

Edgar P Fernandes

John Janos Bozeki

Francis Forest

Matthew J Dufner

Gino A Scribano

Systems and methods may facilitate initial establishment and/or handover of an air-to-ground (ATG) communication link between an aircraft and a ground-based cellular communication network (e.g., a 5G network). The systems and methods may be particularly applicable for an aircraft having a user equipment (UE) antenna that uses narrow beamforming to connect to a cell of a base station (gNB). The UE identifies candidate cells based upon the location of the UE and locations and orientations of cells in the network, identifies a cell having a higher likelihood of connection success compare to other cells, and directs a beam to the chosen cell. The systems and methods may enable the UE to create neighbor lists in real time based upon the UE location, and may prevent blind searching normally associated with narrow beamforming methods.

Neighbor list and beam management for ATG systems

Systems and methods are described for connecting with LEO satellites while reducing emissions toward GEO satellite communications. A system to implement the instant techniques may include a system comprised of a user communications equipment and a LEO constellation. The user equipment ('UE') may comprise a communications modem and an active antenna unit with a transmit and receive beamformer. In further implementations, the UE may include additional receive only beamformers. The LEO constellation can have a regenerative payload or bent pipe, and can include orbits at different altitudes. Methods as described herein may include a procedure by which the user equipment and LEO satellite work together to identify candidate serving satellites, and select the one that allows to meet the power density requirements to avoid interfering with the GEO satellites.

Systems and methods for satellite selection using beamscanning techniques

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.

Beam pointing fine tuning for vehicle-based antennas

Novel techniques for pooling the available transmit power of a beam across the subcarriers that are or that are scheduled to be in use (and not across all available subcarriers) are disclosed. The scheduled subcarriers may be located in the same or different carriers of a modulation transmitter modulation system, and the pooled transmit power may be allocated or distributed across the scheduled subcarriers of the beam. Modulation symbols or resource elements may be transmitted in accordance with allocated, per-subcarrier power budgets, thereby maximizing the SNIR of signals that are transmitted in the beam via the scheduled subcarriers. Additionally, the allocation of the pooled transmit power to various subcarriers may continuously and/or dynamically vary over time, e.g., based on traffic demands, interference characteristics, etc., as well as based on subsequent scheduling of subcarriers to transmit subsequent modulation symbols or resource elements.

Multi-carrier power pooling

Selecting serving cells in air to ground communication systems efficiently and with maximum knowledge of forward and return link channel conditions allows maximum throughput available to a user at any point in time, particularly in the presence of high interference. Airborne based and ground based systems may collect forward and return link channel conditions and develop user capacity estimates to be used by aircraft and ground based transceivers. Such user capacity estimates may be shared among distributed air-to-ground networks to ensure the latest channel conditions are available for serving cell selection decisions.

Servicing cell selection in air to ground communication systems

Disclosed herein are methods and systems for identifying and reducing LTE-system coverage holes due to external interference. One embodiment takes the form of a process that includes receiving a signal in a first wireless band. The received signal comprises a signal of interest. The process also includes determining that a received signal quality of the signal of interest is less than a signal-quality threshold. The process also includes determining that the received signal quality of the signal of interest is less than the signal-quality threshold due to interference external to the first wireless band, and responsively attenuating the received signal. The process also includes demodulating the attenuated received signal to obtain the signal of interest.

Methods and systems for identifying and reducing LTE-system coverage holes due to external interference

A method and apparatus to mitigate radio frequency interference by a broadband mobile device by detecting, at the broadband mobile device, a geographically or physically proximate narrowband uplink transmission, wherein the narrowband uplink transmission is in close enough spectral proximity to at least one bearer channel of the broadband mobile device to result in interference on the narrowband reception when the broadband mobile device is transmitting and a narrowband mobile device is receiving, determining, based on the detected narrowband uplink transmission, a corresponding narrowband downlink frequency, monitoring the determined narrowband downlink frequency, detecting a narrowband downlink transmission at the monitored narrowband downlink frequency, and in response to detecting the narrowband downlink transmission at the monitored narrowband downlink frequency, modifying a broadband uplink transmission to ensure the broadband uplink transmission does not interfere with narrowband downlink reception.

Method and apparatus for mitigating transmission interference between narrowband and broadband mobile devices

A converged communication device and a method of providing broadband communication and narrowband communication with the converged communication device. The method includes determining a data rate at a broadband transceiver of the converged communication device. The method also includes determining a signal-to-interference-plus-noise ratio at a narrowband transceiver of the converged communication device. The method further includes assigning a first communication state to the converged communication device when the data rate is greater than a threshold data rate and the signal-to-interference-plus-noise ratio is greater than a threshold signal-to-interference-plus-noise ratio. The method also includes transmitting, at the broadband transceiver, the broadband communication when the converged communication device is in the first communication state. The method further includes transmitting, at the narrowband transceiver, the narrowband communication when the converged communication device is in the first communication state.

Method and converged communication device for enhancing broadband and narrowband communication

A broadband device () can detect a proximate narrowband transmission () from a narrowband communication device (). The narrowband transmission () can be in close enough proximity () to at least one bearer channel of the broadband device () to result in interference on the narrowband reception () when the broadband device () is transmitting and the narrowband communication device () is concurrently receiving. Responsive to the detecting, the broadband device () can gate a broadband transmission () to ensure the broadband transmission () does not interfere with the proximate narrowband reception (). In absence of detecting the narrowband transmission (), the broadband transmission () from the broadband device () would not be gated.

Mitigating transmission interference between digital radio and broadband communication devices

Growing community of inventors

Elmhurst, IL, United States of America

Michael H Baker