Patent ID: 8477725
Filing Date: 2013-07-02
Classification: H04W

Abstract:
1. A method for implementing optimized handover, comprising: indicating a Packet Data Network Gateway (PDN GW), by an mobility management entity (MME) or a serving gateway (SGW), not to switch at least one of a user plane uplink data path and a user plane downlink data path from a source network to a target network when a connection between the SGW and the PDN GW is being set up, after a connection establishing process to the target network via the source network is initiated by a user equipment (UE) when handover preparation is determined in the source network; and when, the UE is connected to the target network after completion of handover preparation, indicating the PDN GW, by the MME or the SGW, to switch the at least one of the user plane uplink data path and the user plane downlink data path from the source network to the target network; wherein the indicating the PDN GW, by the MME or the SGW, not to switch the at least one of the user plane uplink data path and the user plane downlink data path from the source network to the target network comprises: sending an indication to the SGW, from the MME wherein the indication is forwarded by the SGW to the PDN GW to instruct the PDN GW not to switch the at least one of the user plane uplink data path and the user plane downlink data path from the source network to the target network; or regenerating, by the SGW, an indication, and sending the indication to the PDN GW, to indicate the PDN GW not to switch the at least one of the user plane uplink data path and the user plane downlink data path from the source network to the target network.