A method of scheduling data transmissions between a mobile terminal and a base station in a wireless communications network, in a spectrum aggregated or multi-channel system where several frequency bands are allocated for communication with the mobile terminal, arranged for the transmission of multiple system carrier signals, each system carrier providing for the transmission of signals in a predetermined bandwidth around the carrier, the method comprises receiving in the mobile terminal information from said base station indicating available system carriers; and transmitting from said mobile terminal to said base station information indicating the mobile terminal's capability to handle non-contiguous system carriers by • detecting in the mobile terminal at least one dynamic parameter indicative of the mobile terminal's current capability to handle non-contiguous system carriers, selecting said at least one parameter from the group of parameters consisting of: • a parameter indicative of a charging level of a battery in the mobile terminal, • a parameter indicative of a level of transmission power from the mobile terminal required to achieve a predetermined quality level of data transfer from the mobile terminal, and • a parameter indicative of a level of base band processing capability in the mobile terminal, characterised by • determining in the mobile terminal from said at least one dynamic parameter the occurence of a system carrier event, which occurrence of a system carrier event is detected as being triggered by one of said parameter levels passing a predefined threshold, determining, in dependence of said detected system carrier event, whether a situation has occured in which the mobile terminal's capability to handle non-contiguous system carriers has changed, wherein the terminal's capability to handle non-contiguous system carriers is according to any of spectrum leakage requirements in uplink, blocking requirements in downlink and power of interference signals; • transmitting, if such a situation has occurred, a connection release request from said mobile terminal to said base station; and • transmitting a connection setup request and information indicating the mobile terminal's changed capability to handle non-contiguous system carriers from said mobile terminal to said base station. • detecting in the mobile terminal at least one dynamic parameter indicative of the mobile terminal's current capability to handle non-contiguous system carriers, selecting said at least one parameter from the group of parameters consisting of: • a parameter indicative of a charging level of a battery in the mobile terminal, • a parameter indicative of a level of transmission power from the mobile terminal required to achieve a predetermined quality level of data transfer from the mobile terminal, and • a parameter indicative of a charging level of a battery in the mobile terminal, • a parameter indicative of a level of transmission power from the mobile terminal required to achieve a predetermined quality level of data transfer from the mobile terminal, and • a parameter indicative of a level of base band processing capability in the mobile terminal, • determining in the mobile terminal from said at least one dynamic parameter the occurence of a system carrier event, which occurrence of a system carrier event is detected as being triggered by one of said parameter levels passing a predefined threshold, determining, in dependence of said detected system carrier event, whether a situation has occured in which the mobile terminal's capability to handle non-contiguous system carriers has changed, wherein the terminal's capability to handle non-contiguous system carriers is according to any of spectrum leakage requirements in uplink, blocking requirements in downlink and power of interference signals; • transmitting, if such a situation has occurred, a connection release request from said mobile terminal to said base station; and • transmitting a connection setup request and information indicating the mobile terminal's changed capability to handle non-contiguous system carriers from said mobile terminal to said base station.