Method and device for managing simultaneous connections of a mobile telecommunications device to different networks

Method for managing simultaneous connections of a mobile telecommunications device to at least a wireless local area network and a mobile telephone network via a single terminal of the mobile telecommunications device, the method comprising the steps of:

• a) establishing a first wireless connection of the terminal with the wireless local area network,
• b) establishing a second wireless connection of the terminal with the mobile telephone network,
• c) responding to each network at predetermined times, such that the first and second wireless connections are maintained active,
• d) preventing simultaneous transmittals of data from the terminal to both networks over the first and second wireless connections;
• wherein said steps of responding to each network and preventing simultaneous transmittals are implemented by means of operations performed in the physical and data link layer of the terminal,
• wherein said operations performed in the physical and data link layer comprise determining a length of each data packet to be transmitted to the wireless local area network such that the transmission of said data packet fits in between timeslots allocated for transmissions to said mobile telephone network,
• said determination of said length taking into account the time for gaining access to the wireless local area network, the time for receiving an acknowledgement from the wireless local area network and a charging time of feeding capacitors of the terminal due to a depletion thereof after a mobile telephone transmission.