Patent ID: 9351238
Filing Date: 2016-05-24
CPC Classification: H04L,H04W

Claim Text:
1. A method of offloading wireless data in a core network using a femtocell, wherein the method is performed on the wireless data passing through the core network of a mobile communication network in an Software-defined networking (SDN) including SDN switch connected to a femto base station of the mobile communication network and an Internet, and a SDN controller separated from the SDN switch and configured to control the SDN switch, the method comprising: (a) receiving bearer information set between the femto base station and a mobile communication terminal from the femto base station, by the SDN controller; (b) checking whether the data passing through the core network is real-time data based on the bearer information received in the operation (a), by the SDN controller; (c) determining not to perform a selective Internet protocol traffic offload (SIPTO) when the data is the real-time data and to perform the SIPTO when the data is non-real-time data based on the checking result in the operation (b), by the SDN controller; (d) informing the femto base station and the SDN switch of the determining result whether to perform the SIPTO, by the SDN controller; (e) checking a bearer ID when the femto base station receives data from the mobile communication terminal, selecting a bearer connected to the core network or a bearer connected to an external server according to a confirmation result after confirming the determining result whether to perform the SIPTO, and transmitting corresponding data to the SDN switch using the selected bearer; and (f) directly transmitting data of which the femto base station performs the SIPTO to not the core network but an external network, by the SDN switch.