Patent ID: 8565152

Claim:
A dual mode terminal: a first communication module configured to communicate with a first base station supporting a first protocol; a second communication module configured to communicate with a second base station supporting a second protocol; a first antenna including a switching module connected to either the first communication module or the second communication module, the first antenna configured to transmit/receive either a first base station signal or second base station signals; a second antenna configured to receive the first base station signal and the second base station signals; a diplexer configured to multiplex or demultiplex the second base station signals received via the first antenna if the first antenna is connected to the second communication module; and a triplexer configured to demultiplex the first base station signal and the second base station signals received via the second antenna, wherein if the dual mode terminal is handed over into the second base station from the first base station, the first antenna is connected to second communication module via the diplexer, and wherein the handover is performed from a neighboring LTE base station to a CDMA base station and if a quality of an LTE signal is equal to or smaller than a first threshold for a specific duration and the quality of a CDMA signal is equal to or greater than a second threshold, performing the handover into the neighbor CDMA base station from the LTE base station, wherein the handover includes connecting the first antenna to a CDMA modem from an LTE modem via the diplexer configured to multiplex or demultiplex the second base station signals received via the first antenna.