Patent ID: 8199691
Filing Date: 2012-06-12
Classification: H04M,H04W

Abstract:
1. A mobile communication system comprising: a plurality of extension transmitting/receiving server devices, each transmitting or receiving user data to be transmitted or received between mobile station devices, by employing extension transmission or reception of data in a radio access network relaying data between a core network having a mobile switch station and the mobile station devices; and a radio base station device that transmits or receives the user data to or from the extension transmitting/receiving server devices; and a server selecting unit for selecting at least one of the plurality of extension transmitting/receiving server devices by referring to a management table for managing statuses of the plurality of extension transmitting/receiving server devices; wherein the server selecting unit selects one of the plurality of extension transmitting/receiving server devices when a location ID of the radio base station device on a call originating side and a location ID of the radio base station device on a call receiving side are identical, and the server selecting unit selects different extension transmitting/receiving server devices when the location ID of the radio base station device on the call originating side and the location ID of the radio base station device on the call receiving side are different; and wherein the user data is transmitted through the extension transmitting/receiving server device selected by the server selecting unit.