Communication method based on virtualized evolved packet core network, controller and virtual machine

The invention discloses a communication method based on a virtualized evolved packet core network. The method comprises the following steps: a controller receives a request message sent by a mobile management entity (MME); the controller determines a communication state of UE in the virtualized evolved packet core (EPC)network according to the request message; and the controller generates a first indication message according to the communication state, and sends the first indication message to virtual switches (vSwitch) corresponding to a serving gateway user plane, wherein the first indication message is used for indicating whether the virtual switches (vSwitch) send a downlink data packet arrival instruction to the controller. The invention also discloses another communication method based on the virtualized evolved packet core network, the controller and the virtual machine.