Patent ID: RE45133

Claim:
A method for processing resources comprising: receiving, by a mobility management network element of a packet switched (PS) network, one of (a) a Release Request message sent by an access network of the PS network and (b) a Handoff Complete message sent by a circuit switched (CS) network when a user equipment (UE) is handed over from the PS network to the CS network, and processing resources of the UE in the PS network; wherein the receiving, by the mobility management network element of the PS network, the Handoff Complete message sent by the CS network specifically comprises at least one of: if an interworking solution function (IWS) network element between the CS network and the PS network is integrated with an access network element of the CS network, sending, by the access network element of the CS network, the Handoff Complete message to the mobility management network element of the PS network after receiving the Handoff Complete message sent by the UE; if the IWS network element between the CS network and the PS network is integrated with the mobility management network element of the PS network, sending, by a mobility management network element of the CS network, a Clear Command message to the mobility management network element of the PS network after receiving the Handoff Complete message sent by an access network element of the CS network; if the IWS between the CS network and the PS network is an independent network element, sending, by a mobility management network element of the CS network, a Clear Command message to the IWS network element after receiving the Handoff Complete message sent by an access network element of the CS network; and sending, by the IWS network element, the Handoff Complete message to the mobility management network element of the PS network; and if the IWS network element between the CS network and the PS network is integrated with a mobility management network element of the CS network, sending, by the mobility management network element of the CS network, the Handoff Complete message to the mobility management network element of the PS network after receiving the Handoff Complete message sent by an access network element of the CS network.