Patent ID: 7991399
Filing Date: 2011-08-02
Classification: H04M,H04W,Y02D

Abstract:
1. A mobile communication device comprising: a cellular communication module adapted to communicate with a wireless cellular network: a Wi-Fi communication module adapted to communicate with an access point associated with a Wi-Fi network using a VoIP protocol; a switching circuit adapted to automatically switch operation between the cellular communication module and the Wi-Fi communication module; a timer; and a Wi-Fi signal monitor; wherein if the Wi-Fi signal monitor detects that a level of a Wi-Fi signal is greater than a first predefined threshold value V wherein if the mobile communication device detects both the Wi-Fi signal from the access point and a cellular signal from the wireless cellular network before establishing a communication link, the mobile communication device attempts to establish communication with the access point before attempting to establish communication with the wireless cellular network, wherein said tear-down signal causes the cellular communication module to go into a sleep mode.