Multiband wireless data transmission between aircraft and ground systems based on availability of the ground systems

Patent metadata

Field	Value
Publication number	US-9847796-B2
Application number	US-201414516659-A
Country	US
Kind code	B2
Filing date	Oct 17, 2014
Priority date	Oct 17, 2014
Publication date	Dec 19, 2017
Grant date	Dec 19, 2017

Abstract

Provided are methods and systems for multiband wireless data transmission between aircraft and ground systems. The transmission uses different wavelength ranges, each wavelength range corresponding to a different data domain and establishing a different communication channel. This wavelength differentiation provides physical separation between different data domains and, as a result, improves data security. Furthermore, a single broadband antenna is used on the exterior of the aircraft for transmitting data sets from different data domains. The single antenna configuration reduces drag and weight and improves structural integrity of the aircraft in comparison to multi-antenna configurations. Different aircraft communication modules, which are connected to different aircraft systems, handle different data domains and operate at different wavelength ranges. These modules are connected to the same antenna using a multiplexer. This connection may be controlled using gate devices and may be conditioned on verification of communication channel availability, security status, and other factors.

First claim

The invention claimed is:

1. A method for multiband wireless data transmission between an aircraft and one or more ground systems, the method comprising:
determining a first RF energy at an aircraft broadband antenna, the first RF energy corresponding to a first ground system;
receiving a first data set at a first aircraft communication module,
wherein the first aircraft communication module is connected to an aircraft control domain (ACD) system and the first data set is received from the ACD system;

generating a first radio frequency (RF) signal based on the first data set,
wherein the first RF signal is generated using the first aircraft communication module, and

sending the first RF signal to a multiplexer connected to the aircraft broadband antenna positioned on an exterior of the aircraft, if the first RF energy is within a first RF energy range corresponding to the first ground system;
transmitting the first RF signal using the aircraft broadband antenna to the first ground system, if the first RF signal is sent to the multiplexer;
determining a second RF energy at the aircraft broadband antenna, the second RF energy corresponding to a second ground system;
receiving a second data set at a second aircraft communication module,
wherein the second aircraft communication module is connected to a passenger information and entertainment services domain (PIESD) system and the second data set is received from the PIESD system,
wherein the first aircraft communication module and the second aircraft communication module operate at different security levels and are physically separated,
wherein the first data set and the second data set are physically separated at the aircraft thereby maintaining the different security levels of the first aircraft communication module and the second aircraft communication module such that the first data set is not accessible to the second aircraft communication module and such that the second data set is not accessible to the first aircraft communication module;
generating a second RF signal based on the second data set,
wherein the second RF signal is generated using a second aircraft communication module,

sending the second RF signal to the multiplexer, if the second RF energy is within a second RF energy range corresponding to the second ground system; and
transmitting the second RF signal using the aircraft broadband antenna to a second ground system different from the first ground system, if the second RF signal is sent to the multiplexer,
wherein a wavelength range of the first RF signal is different from a wavelength range of the second RF signal thereby maintaining physical separation between the first data set and the second data set during wireless transmission and allowing for the first RF signal to be transferred simultaneously with the second RF signal,
wherein the second aircraft communication module is not operable within the wavelength range of the first RF signal.

2. The method of claim 1 , further comprising receiving a third data set, wherein the third data set comprises the first RF energy range energy and the second RF energy range.

3. The method of claim 2 , wherein the third data set is received from a communication database of the aircraft.

4. The method of claim 2 , wherein the third data set is based on the current location of the aircraft.

5. The method of claim 2 , wherein the third data set is used to control a connection between the first aircraft communication module and the multiplexer.

6. The method of claim 5 , wherein the first RF energy range energy of the third data set is used to control operation of a first gate device connecting first aircraft communication module and the multiplexer.

7. The method of claim 2 , wherein the third data set is used for selecting information for the first data set.

8. The method of claim 2 , wherein the third data set comprises an encryption key for encrypting information of the first data set.

9. The method of claim 1 , wherein, if the first RF energy is not within the first RF energy range, sending a fourth data set to the second ground communication module, and wherein the fourth data set indicated that the first ground system is not available.

10. The method of claim 1 , wherein the wavelength range of the first RF signal does not overlap with the wavelength range of the second RF signal.

11. The method of claim 1 , wherein transmitting the first RF signal at least partially overlaps in time with transmitting the second RF signal.

12. The method of claim 1 , wherein an antenna of the first ground system is a WiFi antenna, and wherein an antenna of the second ground system is a WiMAX antenna, a cellular antenna, or a SatCom.

13. A system for multiband wireless data transmission between an aircraft and one or more ground systems, the system comprising:
a first aircraft communication module configured to operate within a first wavelength operating range and generate a first radio frequency (RF) signal based on a first data set,
wherein the first aircraft communication module is connected to an aircraft control domain (ACD) system and the first data set is received from the ACD system;

a second aircraft communication module configured to operate within a second wavelength operating range to generate a first radio frequency (RF) signal based on a first data set,
wherein the second aircraft communication module is connected to a passenger information and entertainment services domain (PIESD) system and the second data set is received from the PIESD system,
wherein the first aircraft communication module and the second aircraft communication module operate at different security levels,
wherein the first data set and the second data set are physically separated at the aircraft thereby maintaining the different security levels of the first aircraft communication module and the second aircraft communication module such that the first data set is not accessible to the second aircraft communication module and such that the second data set is not accessible to the first aircraft communication module,
wherein the second wavelength operating range does not overlap with the first wavelength operating range thereby maintaining physical separation between the first data set and the second data set during wireless transmission and allowing for the first RF signal to be transferred simultaneously with the second RF signal, and
wherein the second aircraft communication module is not operable within the wavelength range of the first RF signal;

a communication database comprising a first RF energy range and a second RF energy range for each of multiple locations;
a multiplexer connected to the first aircraft communication module using a first gate device and to the second aircraft communication module using a second gate device,
wherein the first gate device is configured to control sending of the first RF signal from the first aircraft communication module to the multiplexer based on a first RF energy at the aircraft broadband antenna being within the first RF energy range,
wherein the multiplexer is configured to combine RF signals from the first aircraft communication module in the first wavelength operating range and from the second aircraft communication module in the second wavelength operating range; and

a aircraft broadband antenna positioned on exterior of the aircraft,
wherein the broadband antenna is connected to the multiplexer and configured to transmit the RF signals in the first wavelength operating range and the second wavelength operating range to the at least two ground systems different from each other
wherein the firs

Assignees

• Boeing Co

Inventors

• Shelton Jason W
• Mitchell Timothy M
• Nguyen Daniel

Classifications

• H04B1/3822

  specially adapted for use in vehicles (H04B1/3827 takes precedence) · CPC title

• H04B1/0057 Primary

  using diplexing or multiplexing filters for selecting the desired band · CPC title