<p>A method for implementing multi-access is disclosed by this invention and applied to the Evolved Packet System (EPS) in the 3rd Generation Partnership Project (3GPP). The method comprises: when the user equipment (UE) again requests to attach through the second access network (AN) after the UE has accessed the packet data network (PDN) through the first AN, the Packet Data Gateway (P-GW) is informed to carry out multi-band with the gateways of the access networks by carrying a multi-access indication identifier in the signaling which is transmitted for requesting to attach; the P-GW carries out multi-band with the gateway of the first AN and the gateway of the second AN according to the received multi-access indication identifier. In this invention, the UE informs the P-GW that this access is a multi-access scene when the UE initiates an attachment to the Evolved Packet Core network (EPC). The P-GW carries out multi-band with the gateways of multiple different access networks. This invention implements multi-access of the UE under the circumstances of less impact on the AN.</p>
