Patent ID: 8249506

Claim:
A master-slave mobile communication system, comprising: a host device including a call module, a first BLUETOOTH® module and a first communication module, the call module for receiving or transmitting at least one signal, the first communication module for logging in to a first network domain, and for enabling a primary telecommunication channel to be set up between the first communication module and a remote device through the first network domain, and the primary telecommunication channel for transmitting the signal between the host device and the remote device; and an extension device including a second BLUETOOTH® module and a second communication module, the second communication module for logging in to a second network domain, and the first BLUETOOTH® module for detecting and connecting to the second BLUETOOTH® module to form an information channel, wherein the host device directs the extension device to enable, through the second communication module and the second network domain, a secondary telecommunication channel to be set up for connecting to the remote device, and the secondary telecommunication channel and the information channel are for transmitting the signal between the host device and the remote device; and the host device determines whether to stand by under the first network domain and the second network domain simultaneously or not, if the host determines not to stand by under the first network domain and the second network domain simultaneously, determines whether to stand by under the second network domain or not, and if the host device determines to stand by under the second network domain, analyzing a configuration state of the second communication module of the extension device based upon the configuration data, recording the configuration state in the host device, and the second communication module logging in to the second network domain.