Patent ID: 8855649
Filing Date: 2014-10-07
Classification: H04W

Abstract:
1. A network system comprising: a plurality of base stations, each with which a mobile station communicates; a core network to include one or more gateways, each with which the plurality of base stations communicates; a plurality of offload devices, each arranged between the base station and the gateway, each to serve as the gateway of an anchor point at which traffic to be offloaded is transmitted to or received from an offload network, and each to serve as the gateway of a relay point at which the traffic to be offloaded is relayed between the anchor point and one of the plurality of base stations with which the mobile station is communicating; a control station to control the traffic between the mobile station and the gateway; and one or more interception devices, each to intercept the traffic flowing into the interface connecting the control station and the gateway; wherein each of the one or more interception devices obtains user identification information of the mobile station by intercepting the traffic, and stores the user identification information, wherein each of the offload devices intercepts the traffic between the mobile station and the gateway at a time of starting of the traffic between the mobile station and the gateway, obtains line information used for the traffic, and receives the user identification information corresponding to the obtained line information from the interception device, wherein a first offload device of the offload devices, in a case that the first offload device serves as the offload device for a handover source according to handover of the mobile station, receives the user identification information from a second offload device of the offload devices for the handover source or the interception device.