A method comprising: Acquiring , by a first network element providing a first cell of a cellular communication system, information about a terminal device of the cellular communication system, the first cell being a first radio access technology cell; upon determining, based on the acquired information, that the terminal device is capable of utilizing a second radio access technology-based communication, transmitting a cell addition request message to a second network element providing a second cell of the cellular communication system, the second cell being a second radio access technology cell, wherein the cell addition request message indicates that the terminal device is capable of utilizing the second radio access technology-based communication, and wherein the cell addition request message comprises an information element either indicating that the first network element schedules radio resources on a radio band of the first radio access technology for the terminal device or requesting the second network element to schedule radio resources on said radio band for the terminal device ; and initiating reception of a feedback message indicating whether the second network element accepts a cell addition request indicated in the cell addition request message ; characterized by : wherein if the information element of the cell addition request message indicates that the first network element schedules radio resources on said radio band for the terminal device , the method further comprising: receiving a message , from the second network element , the message requesting a permission to schedule radio resources on said radio band for the terminal device ; and upon granting the permission, indicating the permission to the second network element . Acquiring , by a first network element providing a first cell of a cellular communication system, information about a terminal device of the cellular communication system, the first cell being a first radio access technology cell; upon determining, based on the acquired information, that the terminal device is capable of utilizing a second radio access technology-based communication, transmitting a cell addition request message to a second network element providing a second cell of the cellular communication system, the second cell being a second radio access technology cell, wherein the cell addition request message indicates that the terminal device is capable of utilizing the second radio access technology-based communication, and wherein the cell addition request message comprises an information element either indicating that the first network element schedules radio resources on a radio band of the first radio access technology for the terminal device or requesting the second network element to schedule radio resources on said radio band for the terminal device ; and initiating reception of a feedback message indicating whether the second network element accepts a cell addition request indicated in the cell addition request message ; characterized by : wherein if the information element of the cell addition request message indicates that the first network element schedules radio resources on said radio band for the terminal device , the method further comprising: receiving a message , from the second network element , the message requesting a permission to schedule radio resources on said radio band for the terminal device ; and upon granting the permission, indicating the permission to the second network element . receiving a message , from the second network element , the message requesting a permission to schedule radio resources on said radio band for the terminal device ; and upon granting the permission, indicating the permission to the second network element . <EOS>