A method in an Internet Protocol, IP, enabled wireless communication network for reducing control signaling in handover situations, wherein the method comprises the steps of: - using IP multicast for data transport of a unicast session for a user equipment, UE, going into active mode connected to a first base station; - allocating an IP multicast address for the UE in a network gateway, i.e. SAE GW, between an external IP network and an infrastructure network; - informing a mobility management entity, MME, about the IP multicast address; - using, in the network gateway, the IP multicast address for sending user plane data downlink to the UE; characterized in the steps of: - by means of the MME, informing the first base station between the UE and the infrastructure network about the IP multicast address; - by means of the first base station, sending an Internet Group Message Protocol, IGMP, Join message to IP enabled routers in the infrastructure network to make these aware of that the first base station is to receive data for the allocated IP multicast address, - by means of the IP enabled routers, creating a first transport path between the network gateway and the first base station; - using the IP enabled routers in the infrastructure network to transport the user plane data via the first transport path to the first base station, - when the UE has moved into a new cell reachable via a second base station, indicating, by means of the MME, the allocated IP multicast address for the UE to the second base station; - by means of the second base station, sending an IGMP Join message to the IP enabled routers in the infrastructure network, - by means of the IP enabled routers, creating a second transport path between the network gateway and the second base station, and - using the IP enabled routers to transport the user plane data via the second transport path to the second base station, whereby control signaling to the network gateway in handover situations is reduced. - using IP multicast for data transport of a unicast session for a user equipment, UE, going into active mode connected to a first base station; - allocating an IP multicast address for the UE in a network gateway, i.e. SAE GW, between an external IP network and an infrastructure network; - informing a mobility management entity, MME, about the IP multicast address; - using, in the network gateway, the IP multicast address for sending user plane data downlink to the UE; characterized in the steps of: - by means of the MME, informing the first base station between the UE and the infrastructure network about the IP multicast address; - by means of the first base station, sending an Internet Group Message Protocol, IGMP, Join message to IP enabled routers in the infrastructure network to make these aware of that the first base station is to receive data for the allocated IP multicast address, - by means of the IP enabled routers, creating a first transport path between the network gateway and the first base station; - using the IP enabled routers in the infrastructure network to transport the user plane data via the first transport path to the first base station, - when the UE has moved into a new cell reachable via a second base station, indicating, by means of the MME, the allocated IP multicast address for the UE to the second base station; - by means of the second base station, sending an IGMP Join message to the IP enabled routers in the infrastructure network, - by means of the IP enabled routers, creating a second transport path between the network gateway and the second base station, and - using the IP enabled routers to transport the user plane data via the second transport path to the second base station,