Mobile communications system, mobile communications method, server, transfer device, and mobile communications terminal

Abstract

A mobile communications system for transferring packets to a mobile communications terminal according to address information of the mobile communications terminal is disclosed. The mobile communications terminal is located in a moving network connected to a given node in a core network. The address information of the mobile communications terminal includes common information related to the given node to which the moving network is connected, and individual information which is unrelated to the given node to which the moving network is connected and is unchanged when the given node to which the moving network is connected is changed.

What is claimed is:  
     
         1 . A mobile communications system for transferring packets to a mobile communications terminal according to address information of the mobile communications terminal, the mobile communications terminal being located in a moving network connected to a given node in a core network, wherein: 
 the address information of the mobile communications terminal comprises:    common information related to the given node to which the moving network is connected; and    individual information which is unrelated to the given node to which the moving network is connected and which is unchanged when the connection to the given node to which the moving network is connected is changed to another node.    
     
     
         2 . A mobile communications method of transferring packets to a mobile communications terminal according to address information of the mobile communications terminal, the mobile communications terminal being located in a moving network connected to a given node in a core network, 
 wherein the address information of the mobile communications terminals comprises common information related to the given node to which the moving network is connected and individual information unrelated to the given node to which the moving network is connected;    and the method comprising the steps of:    detecting a change of the given node to which the moving network is connected, in a given mobile communications terminal located in the moving network;    changing the address information of all mobile communications terminals located in the moving network, only by changing common information of the address information of the mobile communications terminals, in the given mobile communications terminal;    notifying the mobile communications terminals located in the moving network, of the change of the address information of the mobile communications terminals, in the given mobile communications terminal; and    notifying an address management device configured to manage address information of the mobile communications terminals located in the moving network of the change, in the given mobile communications terminal.    
     
     
         3 . A mobile communications method of transferring packets to a mobile communications terminal according to address information of the mobile communications terminal, the mobile communications terminal being located in a moving network connected to a given node in a core network, 
 wherein the address information of the mobile communications terminals comprises common information related to the given node to which the moving network is connected and individual information unrelated to the given node to which the moving network is connected;    and the method comprising the steps of:    notifying a mobile node configured to manage the moving network of common information related to the given node, in the given node;    changing the address information of all mobile communications terminals located in the moving network, only by changing common information of the address information of the mobile communications terminals according to the notified common information, in the mobile node; and    notifying an address management device configured to manage the address information of the mobile communications terminals in the moving network, of the change of the address information of the mobile communications terminals, in the mobile node.    
     
     
         4 . A server in a mobile communications system for transferring packets to mobile communications terminals according to address information of the mobile communications terminal, the mobile communications terminals being located in a moving network connected to a given node in a core network, the server comprising: 
 an address information manager configured to manage the address information of all mobile communications terminals located in the moving network; and wherein    the address information of the mobile communications terminals comprise:    common information related to the given node to which the moving network is connected; and    individual information which is unrelated to the given node to which the moving network is connected and is unchanged when the connection to the given node to which the moving network is connected is changed to another node.    
     
     
         5 . The server as set forth in  claim 4 , wherein the address information manager changes only the common information according to a notification from a given mobile communications terminal located in the moving network or a mobile node configured to manage the moving network.  
     
     
         6 . A transfer device provided on a packet transfer path in a mobile communications system for transferring packets to a mobile communications terminal according to address information of the mobile communications terminal, the mobile communications terminal being located in a moving network connected to a given node in a core network, the transfer device comprising: 
 an address information manager configured to relate the address information of the mobile communications terminal located in the moving network; wherein    the address information of the mobile communications terminal includes common information related to the given node to which the moving network is connected and individual information unrelated to the given node to which the moving network is connected.    
     
     
         7 . The transfer device as set forth in  claim 6 , wherein: 
 the address information manager changes the address information of the mobile communications terminals, only by changing the common information according to a notification from a given mobile communications terminal located in the moving network or a mobile node configured to manage the moving network.    
     
     
         8 . The transfer device as set forth in  claim 6 , further comprising an address converter configured to convert first common information of the address information of the mobile communications terminal, into second common information of the address information of the mobile communications terminal, within received packets; 
 and wherein the address information manager relates the first common information to the second common information.    
     
     
         9 . A mobile communications terminal in a mobile communications system for transferring packets to mobile communications terminals located in the moving network connected to a given node in a core network according to address information of the mobile communications terminals, the mobile communications terminal comprising: 
 an address information manager configured to manage the address information of the mobile communications terminals located in the moving network; wherein    the address information of the mobile communications terminals comprises common information related to the given node to which the moving network is connected and individual information unrelated to the given node to which the moving network is connected.    
     
     
         10 . The mobile communications terminal as set forth in  claim 9 , wherein: 
 when detecting a change of the given node to which the moving network is connected, the address information manager changes the address information of the mobile communications terminal, only by changing the common information; and    the address information manager notifies an address management device configured to manage the address information of the mobile communications terminal located in the moving network, of the change of the address information of the mobile communications terminal.