Method and system for transmission terminal to support double-frequency-band multicarrier capacity

The invention discloses a method for a transmission terminal to support double-frequency-band multicarrier capacity; when the terminal UE (user equipment) supports the double-frequency-band multicarrier, the UE enables the supported frequency-band combined information and the capacity of all frequency bands in supporting the configuration of downlink carrier number to be carried in an interactive message of a radio network controller (RNC) to be transmitted to the RNC. The invention also discloses a system for the transmission terminal to support double-frequency-band multicarrier capacity correspondingly. As the RNC can obtain the frequency-band combination supported by the UE and the number of respective supported and configured downlink carriers of two frequency bands in each frequency-band combination after analyzing the interactive message from the UE, so as to provide reference for resource distribution, the method and the system are beneficial to reasonable resource distribution of network side and improve the network resource utilization rate.