Patent ID: 8929336
Filing Date: 2015-01-06
Classification: H04M,H04W

Abstract:
1. A method in a mobility management entity (MME) for enabling handover of a communications service of a user equipment (UE) between a circuit switched (CS) network and a packet switched (PS) network, the UE being located in the CS network and having a communications service in the CS network, the method comprising: receiving, by the MME, a handover request message from a mobile service switching center (MSC) server, for handover of the UE from the CS network to the PS network indicating that an allocation of a resource associated with the communications service in the PS network is needed; sending, by the MME, a resource allocation request message to a base station, in the PS network; receiving, by the MME, from the base station a resource allocation response message comprising information about the allocation of the resources in the PS network; sending, by the MME, to the MSC server a handover response message, comprising information about the allocation of the resources in the PS network; receiving, by the MME, from the base station a handover notification message comprising a notification that the handover from the CS network to the PS network is set up in the UE; receiving, by the MME, from a serving gateway (SGW) a create dedicated bearer request message, comprising a request to create a dedicated bearer associated with the communications service in the PS network; sending the MME, to the UE an activate dedicated bearer request message comprising a request to activate a dedicated bearer associated with the communications service; receiving, by the MME, from the UE an activate dedicated bearer response message comprising information about the activated dedicated bearer associated with the communications service; and sending, by the MME, to the SGW a create bearer response message comprising information about the created dedicated bearer associated with the communications service, enabling handover of the communications service between the CS network and the PS network.