Method and arrangements for wireless communication in a vehicle

Abstract

The present invention provides an operational mode of communication which adjusts a transmitting power of a cellular system and a mobile terminal used inside a vehicle, such as an aircraft, so that the mobile terminals (102) inside the aircraft camp on the indoor cellular network (100) inside the aircraft and do not interfere with external cellular networks. This reduces possible electromagnetic interference with avionics inside the aircraft, because the transmitted power levels is limited. The frequency band used by the indoor cellular network can be determined by the service provider independent of frequency bands allocated by communication specifications and regulations. Conventional mobile terminals (102) and conventional base transceiver stations (104) applying the aircraft profile according to the invention can be used inside the aircraft while aboard to communicate with the conventional external cellular networks (150).

Description

TECHNICAL FIELD OF THE INVENTION [0001] The present invention relates to the field of mobile radio communication systems in cellular wireless networks, and more particularly to mobile communication systems using wireless network cells inside a vehicle, such as an aircraft, other airborne vessel, ship or train while aboard. BACKGROUND OF THE INVENTION [0002] The use of mobile phones is restricted inside airline carriers due to a possibility that the transmission of a mobile phone could cause interference problems. [0003] The Federal Communications Commission (FCC), which regulates the use of wireless mobile phones aboard aircrafts while they are in flight, has since 1988 barred the use of cellular phones in the air because of their potential to interfere with terrestrial cellular calls. This regulation names only mobile phones operating in the 850 MHz cellular band, but the airlines have the authority to decide about the use of any type of mobile phone during flight. The Federal Avia...

AI Technical Summary

Benefits of technology

[0014] The present invention provides an aircraft profile which adjusts a transmitting power of a cellular system and a mobile terminal used inside the aircraft to a limit value that the mobile terminals inside the aircraft camp the indoor cellular network inside the aircraft and do not interfere with external cellular networks. This limit value of transmitting power in the indoor cellular network also reduces possible electromagnetic interference with avionics inside the aircraft, because the transmitte

Problems solved by technology

The use of mobile phones is restricted inside airline carriers due to a possibility that the transmission of a mobile phone could cause interference problems.

The Federal Communications Commission (FCC), which regulates the use of wireless mobile phones aboard aircrafts while they are in flight, has since 1988 barred the use of cellular phones in the air because of their potential to interfere with terrestrial cellular calls.

The Federal Aviation Administration (FAA) recommends for its part that the use of a cellular phone is unauthorized during taxiing, take-off and landing.

Some other problems have also arisen due to relatively high transmitting power of wireless systems and electromagnetic interference thereof.

Anecdotal instances suggest that the use of the mobile phone on an aircraft might interfere with the navigation equipment and other avionics or communications equipment on the aircraft.

Another problem is that due to the height of an airborne aircraft the wireless network coverage does not cover the mobile phones on an airborne aircraft because the terrestrial wireless networks are designed for lateral transmission and reception of radio frequency signals and for relatively slow moving ve

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