Patent ID: 8406181
Filing Date: 2013-03-26
Classification: H04L,H04W

Abstract:
1. A communication system which includes plural radio systems, and which connects to a terminal apparatus corresponding to the plural radio systems, comprising: access points for each radio system; a monitoring node on a network side of the communication system; a control node on the network side; and an Authentication Authorization and Accounting (AAA) server which is shared by the plural radio systems; wherein the AAA server assigns an IP address to the terminal apparatus in a radio system which is initially connected among the plural radio systems according to an IP address assignment request from the terminal apparatus, judges whether an IP address assignment request for a radio system to be subsequently connected is from the same terminal apparatus by using an unique identifier of the terminal apparatus, and assigns the IP address assigned in the initially connected radio system to the terminal apparatus in the radio system to be subsequently connected in a case where the assignment request is determined to be from the same terminal apparatus; wherein the monitoring node connected to the access points for the each radio system obtains radio information on the each radio system, which includes a number of connected terminals and a load of the each radio systems, wherein a radio system for communicating a packet is determined by only the network side according to the obtained radio information, and wherein, for each packet, the control node switches the radio system for communicating the packet, according to the determination made by the network side.