Patent ID: 8520637
Filing Date: 2013-08-27
Classification: H04W

Abstract:
1. A mobile communication system having a first communication system and a second communication system configured to forward forwarding data from the first communication system to the second communication system when switching from the first communication system to the second communication system is determined, the forwarding data being a data that the first communication system has already received from a core network device, wherein a network device transmitting direct data to a mobile communication terminal via the second communication system is configured to count a number of the switching from the first communication system to the second communication system for mobile communication terminals, the network device is configured to count a number of successful reception of information identifying mobile communication terminals via a forwarding path of the forwarding data, and the network device is configured to judge whether the forwarding path of the forwarding data is normal on the basis of a ratio between the number of switching and the number of successful reception.