Patent ID: 8311541
Filing Date: 2012-11-13
Classification: H04W,Y02D

Abstract:
1. A mobile communication system, comprising: a plurality of base stations to which mobile terminals are to be connected; and a plurality of call control servers that accommodate the mobile terminals based on a location registration request, wherein: the plurality of call control servers include at least a first call control server and a second call control server, and an identifier identifying one of the call control servers which accommodates the mobile terminals and that is assigned to each of the mobile terminals, the first call control server is configured to: calculate a load on the first call control server based on a processing amount of control signals between the plurality of base stations and the first call control server; and cause at least one of the mobile terminals accommodated in the first call control server to transmit the location registration request in a case in which it is judged that the load on the first call control server is low, based on at least one of a result of comparison between the calculated load and a predetermined threshold value and a result of comparison between the number of mobile terminals accommodated in the first call control server and a predetermined number; the one of the plurality of base stations corresponding to the one of the mobile terminals is configured to: select the second call control server into which the one of the mobile terminals is to be newly accommodated from among the plurality of call control servers in a case in which the location registration request transmitted from the one of the mobile terminals is received; and forward the location registration request to the selected second call control server; the second call control server is configured to accommodate the one of the mobile terminals in a case in which the forwarded location registration request is received; and the first call control server is further configured to switch to a power-saving state after all of the mobile terminals which are assigned the identifier representing the first call control server are accommodated into the second call control server.