A method for transceiving IP data by a UE performing handover between first and second heterogeneous networks, the method comprising: transceiving (S730, S740) data to/from a first network node of a first network using an IP address of an IPv4 and an IP address of an IPv6, wherein the IP address of the IPv4 and the IP address of the IPv6 are assigned for the UE by the first network, wherein the first network simultaneously supports data transmission paths of the IPv4 and the IPv6, wherein the first network and a second network are heterogeneous from each other, and wherein the second network supports data transmission path of the IPv4 or the IPv6; after a handover from the first network node of the first network to the second network is decided, transmitting a message containing information regarding the IPv4 and the IPv6 assigned by the first network, information regarding the IP address of the IPv4 and the IP address of the IPv6 and information indicating which of the IPv4 and the IPv6 can be supported by the UE in the second network, to a second network node of the second network; receiving, from the second network node of the second network, an IP address of the IPv4 or an IP address of the IPv6 assigned by the second network, and transceiving data to/from the second network node of the second network using the IP address of the IPv4 or the IP address of the IPv6 assigned by the second network, wherein the IP address of the IPv4 assigned by the second network is the same as the IP address of the IPv4 assigned by the first network prior to handover, or wherein the IP address of the IPv6 assigned by the second network is the same as the IP address of the IPv6 assigned by the first network prior to handover. transceiving (S730, S740) data to/from a first network node of a first network using an IP address of an IPv4 and an IP address of an IPv6, wherein the IP address of the IPv4 and the IP address of the IPv6 are assigned for the UE by the first network, wherein the first network simultaneously supports data transmission paths of the IPv4 and the IPv6, wherein the first network and a second network are heterogeneous from each other, and wherein the second network supports data transmission path of the IPv4 or the IPv6; after a handover from the first network node of the first network to the second network is decided, transmitting a message containing information regarding the IPv4 and the IPv6 assigned by the first network, information regarding the IP address of the IPv4 and the IP address of the IPv6 and information indicating which of the IPv4 and the IPv6 can be supported by the UE in the second network, to a second network node of the second network; receiving, from the second network node of the second network, an IP address of the IPv4 or an IP address of the IPv6 assigned by the second network, and transceiving data to/from the second network node of the second network using the IP address of the IPv4 or the IP address of the IPv6 assigned by the second network, wherein the IP address of the IPv4 assigned by the second network is the same as the IP address of the IPv4 assigned by the first network prior to handover, or wherein the IP address of the IPv6 assigned by the second network is the same as the IP address of the IPv6 assigned by the first network prior to handover.