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Cabin Radio Shielding for Onboard Mobile Network Services

IP.com Disclosure Number: IPCOM000243741D
Publication Date: 2015-Oct-16
Document File: 5 page(s) / 180K

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The IP.com Prior Art Database

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IP doc: IP.COM

Abstract

The idea of Cabin Radio Shielding can be used in the field of passenger connectivity systems installed Onboard of vehicles and aircraft A C The present idea prevents interaction with external radio frequency based systems e g WiFi WLAN GSM CDMA UMTS LTE weather radars Wireless Sensor Networks WAIC The idea consists of optical transparent and electromagnetically shielded window panes and conductive material or coating for the seal rubber The solution is elementary and cheap without any conductive bonding to the vehicles window frames and metallic structure For the desired low and medium high shielding attenuation the bonding of the window to the aircraft fuselage could be done by capacitive coupling resonant wave trap circuits overlap and conductivity of the window seal The installation would be the same as for conventional unshielded aircraft cabin window And furthermore the architecture of an according Onboard telephony system would be much simpler and cheaper with additional A C Cabin Shielding

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Cabin Radio Shielding for Onboard Mobile Network Services

The idea of Cabin Radio Shielding can be used in the field of passenger connectivity systems installed Onboard of vehicles and aircraft (A/C).

The idea prevents interaction with external radio frequency based systems, e.g. WiFi / WLAN, GSM, CDMA, UMTS, LTE, weather radars, Wireless Sensor Networks (WAIC).

The invention is related to A/C internal passenger communication systems (e.g. WiFi / WLAN, GSM/UMTS/LTE-on-board) isolating them from the outside environment of the A/C which can be useful to

 Isolate the passengers devices from the ground networks (non-interference)
 Protect passengers privacy (interception)
 Prohibit terrorism interrupting the radio links
 Decrease interference of passenger communication with aeronautical NAV/ COM systems (pilots and towers communication)

To operate a mobile communication system Onboard A/C today the passenger's mobile radio devices are isolated from the ground network by applying a noise floor inside the aircraft cabin disrupting the radio link by its S/N ratio. This method is accepted by many regulatory agencies.

Disadvantages of the applied solutions to suppress the ground network signals by active noise generation inside the aircraft cabin are: weight, power consumption, costs, maintenance, installation effort and complicated architecture with frequent updates of hardware and software.

Exemplary state of the art architecture contains Base Transceiver Stations (BTS) and a noise generator connected to Leaky Line Antennas spreading the signals simultaneously in the A/C cabin to suppress signals from the ground networks.

Electromagnetic Radio Shielding for cockpit windows invented to prevent radio interference with radio NAV / COM systems is common but the technical solutions are very complicated and costly applying conductive bonding to the window frame and aircraft fuselage. Those techniques are not economical for the large number of cabin windows.

In future - with the Cabin Shielding invention - a mobile communication system can be operated Onboard A/C isolating the passenger's mobile radio devices from the ground network by shielding the aircraft cabin disrupting the radio link by decreasing the signal below the receiver's sensitivity.

The invention brings the following advantages:
- Enable future passenger communication systems without noise generator

- Isolate the passengers devices from the ground networks (non-interference)

- Protect passengers privacy (interception)

- Prohibit terrorism interrupting the radio links

- Decrease EMI of passenger communication with aeronautical radio NAV/ COM systems (pilots & towers com)


- Active noise generation inside the A/C is not necessary

- Electronic Noise generator Onboard will be obsolete

- Savings of Weight, cost, installation effort, power consumption

- PAX attendant announcement "switch off radio equipment" is obsolete: Frequency Regulation through ECC for future Onboard mobi...