Method for mode selecting and switching in dual-frequency integrated system

A base station, comprising:

• a first transmitter configured to transmit data on a first frequency band;
• a second transmitter configured to transmit, on a second frequency band, a detection signal for detecting channel conditions of the second frequency band to a user equipment;
• a receiver configured to receive channel condition information about the second frequency band from the user equipment on the first frequency band;
• wherein, the channel condition information about the second frequency band is generated by the user equipment based on the received detection signals;
• and
• a processor configured to select a current data transmission frequency band based at least in part on the received channel condition information about the second frequency band and/or traffic requirement information;
• wherein the current data transmission frequency band is any one of the first frequency band, the second frequency band, or cooperative transmission of the first frequency band with the second frequency band.

A user equipment, comprising:

• a first receiver configured to receive data on a first frequency band;
• a second receiver configured to receive, from a base station and on the second frequency band, a detection signal for detecting a channel condition of the second frequency band;
• a processor configured to generate channel condition information about the second frequency band based on the received detection signal, wherein, the channel condition information about the second frequency band comprises channel LOS/NLOS information about the second frequency band, receiving power of the detection signal and SINR of the detection signal;
• and
• a transmitter configured to transmit the channel condition information about the second frequency band to the base station via the first frequency band.