Patent ID: 7324478

Claim:
A method for deciding an access system based on WLAN signal strength in a WLAN/mobile phone network interworking system, comprising: an initialization step for performing an initialization process on a WLAN driver module and a mobile network driver module, and measuring and displaying WLAN signal strength; a service decision step for selecting a WLAN service or mobile phone network service according to the measured WLAN signal strength; and a service access step for enabling the corresponding driver module to access the service decided in the service decision step, wherein the service decision step comprises: a first step for deciding whether the measured WLAN signal strength, value is greater than a reference value for setting a WLAN mode; and a second step for enabling a WLAN driver module and disabling a mobile phone network driver, module when the measured value is greater than the reference value in the first step, and disabling the WLAN driver module and enabling the mobile network driver module when the measured value is smaller than the reference value; wherein, in the service access step, when a communication mode of a terminal is a WLAN mode, if an average of N WLAN signal strength values measured for a predetermined period is smaller than a reference value, or if N1 (>=N) WLAN signal strength values are all smaller than the reference value, the WLAN mode is converted into a mobile phone network mode.