A first master node (MN) receives an interface message from a secondary node (SN), wherein the second interface message comprises at least one of a first measurement configuration and a secondary cell group (SCG) configuration; the first MN transmits a Handover Request message to a second MN, wherein the Handover Request message comprises the at least one of the first measurement configuration and the second SCG configuration; the first MN receives a Handover Request Acknowledge message from the second MN, wherein the Handover Request Acknowledge message comprises a Handover Command message; and the first MN transmits the Handover Command message to the communication device.