A method for allowing a communication terminal to configure a measurement gap pattern on a downlink carrier frequency for measurement on a target carrier frequency by said communication terminal, the communication terminal being capable of performing measurements on at least two downlink carrier frequencies without measurement gap, the method comprising: obtaining an indication that there is a need for the measurement gap pattern, for performing the measurement on the target carrier frequency; retrieving information about how to configure the measurement gap pattern, the information being used to establish at least one criterion for choosing the most suitable downlink carrier frequency on which the measurement gap pattern should be configured; and determining, based on the at least one criterion, the most suitable downlink carrier frequency on which the measurement gap pattern is to be configured; characterized in that the at least one criterion is one of the following criteria: - choose a downlink carrier frequency which is adjacent to the least number of other downlink carrier frequencies of the communication terminal; - choose a downlink carrier frequency which shares frequency band with the least number of other downlink carrier frequencies of the communication terminal; - choose a downlink carrier frequency over which data is the least time critical; - choose a downlink carrier where there is no other gap pattern already configured; - choose a downlink carrier based on whether a gap density of the gap pattern is above or below a pre-defined threshold. obtaining an indication that there is a need for the measurement gap pattern, for performing the measurement on the target carrier frequency; retrieving information about how to configure the measurement gap pattern, the information being used to establish at least one criterion for choosing the most suitable downlink carrier frequency on which the measurement gap pattern should be configured; and determining, based on the at least one criterion, the most suitable downlink carrier frequency on which the measurement gap pattern is to be configured; characterized in that the at least one criterion is one of the following criteria: - choose a downlink carrier frequency which is adjacent to the least number of other downlink carrier frequencies of the communication terminal; - choose a downlink carrier frequency which shares frequency band with the least number of other downlink carrier frequencies of the communication terminal; - choose a downlink carrier frequency over which data is the least time critical; - choose a downlink carrier where there is no other gap pattern already configured; - choose a downlink carrier based on whether a gap density of the gap pattern is above or below a pre-defined threshold. - choose a downlink carrier frequency which is adjacent to the least number of other downlink carrier frequencies of the communication terminal; - choose a downlink carrier frequency which shares frequency band with the least number of other downlink carrier frequencies of the communication terminal; - choose a downlink carrier frequency over which data is the least time critical; - choose a downlink carrier where there is no other gap pattern already configured; - choose a downlink carrier based on whether a gap density of the gap pattern is above or below a pre-defined threshold.