Patent ID: 8509163

Claim:
A method for an evolved nodeB (ENB) selecting a core network (CN) equipment for a user equipment (UE), wherein the ENB is connected with multiple pools of CN equipment, the method comprising: receiving, by the ENB, a first message sent from the UE; determining, by the ENB, whether the ENB has a connection to a first CN equipment to which the UE registered previously, according to the received first message; if the ENB has no connection to the first CN equipment to which the UE registered previously: selecting, by the ENB, a first pool having a lowest probability of CN equipment relocation in the multiple pools; and selecting, by the ENB, a second CN equipment for the UE from the selected first pool; if the ENB has the connection to the first CN equipment: selecting, by the ENB, the first CN equipment for the UE.