User equipment, method for determining a resource and system for allocating a resource

A method for determining a resource, comprising: if data transmission on a carrier of the dual carriers of a User Equipment (UE) reaches the maximum transmission data supported in a permitted area by Grant Service (SG) , anda transmission power of the UE is capable of improving a transmission rate of data carrier, and laportadora and the other carrier of the dual carriers are unable to complete the transmission delEstado data of the total buffer in the same period delay, determining (101) that is insufficient someResource assigned to the UE on the carrier; otherwise, determining (102) which is sufficient resource allocated to the UE on the carrier.