Patent ID: 9432899
Filing Date: 2016-08-30
CPC Classification: H04W

Claim Text:
1. A method of a transient handover for performing packet offloading, used in a communications system, wherein the communications system is used in a cellular network, the method comprising: finding, by a mobility management entity (MME), at least one qualified user equipment (UE) executing an application from a plurality of user equipment (UEs) according to a determining method, and transmitting a handover-transient request to the qualified UE; finding and transmitting, by the qualified UE, an access request to a wireless local area network after receiving the handover-transient request; accessing, by the qualified UE, the wireless local area network, and transmitting a handover-transient ACK to the MME; releasing, by the MME, a bearer resource of the qualified UE, retaining bearer information of the qualified UE, and handing over the qualified UE from the cellular network to the wireless local area network after receiving the handover-transient ACK; detecting, by the qualified UE, whether the wireless local area network satisfies quality-of-service (Qos) of the application after the qualified UE is handed over from the cellular network to the wireless local area network; determining whether the wireless local area network satisfies the Qos of the application; transmitting, by the qualified UE, a first attachment request (ATTACH REQ) to the MME when determining that the wireless local area network does not satisfy the Qos of the application; and receiving, by the MME, the first ATTACH REQ transmitted from the qualified UE, transferring the qualified UE to an evolved packet system mobility management registered state (EMM-REGISTERED State), and re-establishing a cellular data path to handover the qualified UE from the wireless local area network to the cellular network, wherein the first ATTACH REQ comprises a Request Type field, and the Request Type field indicates a handover procedure.