A method in a wireless communication network, said wireless communication network providing radio access for a terminal device via at least a first and second type of wireless radio accesses operating with different radio access technologies, RATs, wherein the method is for coordinating mechanisms for simultaneous multi-RAT camping and comprises the steps of: - transmitting, by at least one network node (50, 30 1, 30 2), an indication regarding a set of camping areas, CAs, including a first set of camping areas (CA-RAT1) being associated with the first RAT and a second set of camping areas (CA-RAT2) being associated with the second RAT; - performing, by the terminal device, camping in a coverage area defined based on the set of CAs (CA-RAT1, CA-RAT2); - updating, by the terminal device, the communication network with a geographic location of the terminal device a) when the terminal device enters a new coverage area being different from the coverage area defined by both the first and second set of CAs (CA-RAT1, CA-RAT2) as a first mechanism, or b) when the terminal device enters a new coverage area being different from the coverage area defined by one of the first and second set of CAs (CA-RAT1, CA-RAT2) as a second mechanism, the method being characterized by: the first RAT being associated with the first set of camping areas (CA-RAT1) is a priority RAT and the second RAT being associated with the second set of camping areas (CA-RAT2) is a backup RAT, and wherein said updating the communication network with a geographic location of the terminal device is, as a third mechanism, c) performed when the terminal device enters a new coverage area being different from the coverage area defined by the first set of camping areas (CA-RAT1), and d) is not performed when the terminal device leaves the coverage area defined by the second set of camping areas (CA-RAT2) but remains within the coverage area defined by the first set of camping areas (CA-RAT1.) - transmitting, by at least one network node (50, 30 1, 30 2), an indication regarding a set of camping areas, CAs, including a first set of camping areas (CA-RAT1) being associated with the first RAT and a second set of camping areas (CA-RAT2) being associated with the second RAT; - performing, by the terminal device, camping in a coverage area defined based on the set of CAs (CA-RAT1, CA-RAT2); - updating, by the terminal device, the communication network with a geographic location of the terminal device a) when the terminal device enters a new coverage area being different from the coverage area defined by both the first and second set of CAs (CA-RAT1, CA-RAT2) as a first mechanism, or b) when the terminal device enters a new coverage area being different from the coverage area defined by one of the first and second set of CAs (CA-RAT1, CA-RAT2) as a second mechanism, the method being characterized by: the first RAT being associated with the first set of camping areas (CA-RAT1) is a priority RAT and the second RAT being associated with the second set of camping areas (CA-RAT2) is a backup RAT, and wherein said updating the communication network with a geographic location of the terminal device is, as a third mechanism, c) performed when the terminal device enters a new coverage area being different from the coverage area defined by the first set of camping areas (CA-RAT1), and d) is not performed when the terminal device leaves the coverage area defined by the second set of camping areas (CA-RAT2) but remains within the coverage area defined by the first set of camping areas (CA-RAT1.) a) when the terminal device enters a new coverage area being different from the coverage area defined by both the first and second set of CAs (CA-RAT1, CA-RAT2) as a first mechanism, or b) when the terminal device enters a new coverage area being different from the coverage area defined by one of the first and second set of CAs (CA-RAT1, CA-RAT2) as a second mechanism, the method being characterized by: the first RAT being associated with the first set of camping areas (CA-RAT1) is a priority RAT and the second RAT being associated with the second set of camping areas (CA-RAT2) is a backup RAT, and wherein said updating the communication network with a geographic location of the terminal device is, as a third mechanism, c) performed when the terminal device enters a new coverage area being different from the coverage area defined by the first set of camping areas (CA-RAT1), and d) is not performed when the terminal device leaves the coverage area defined by the second set of camping areas (CA-RAT2) but remains within the coverage area defined by the first set of camping areas (CA-RAT1.)