MOBILE COMMUNICATION SYSTEM, NETWORK DEVICE, AND MOBILE COMMUNICATION METHOD

摘要

Disclosed are a mobile communication system, a network device, and a mobile communication method. In a handover procedure that switches from the bearer of a first communication call set between a first communication system and a mobile communication terminal to the bearer of the first communication call set between a second communication system and the mobile communication terminal, the second communication system determines whether or not the first communication call had been set between the first communication system and the mobile communication terminal, or, on the basis of the data volume of the first communication call set between the first communication system and the mobile communication terminal, determines whether or not to set the bearer of the first communication call between the second communication system and the mobile communication terminal.