Mobile communication system, radio network controller, base station and user equipment

Abstract

A mobile communication system includes a mobile station, a first base station and a second base station configured to perform radio communication with the mobile station, and a gateway station configured to perform communication with the first base station and the second base station or with the mobile station via the first base station and the second base station. One communication is performed between the mobile station and the gateway station by establishing a first communication connection between the gateway station and the first base station, a first radio communication connection between the first base station and the mobile station, and a second radio communication connection between the second base station and the mobile station. This enables a normal change of a cell during communication without any load on a network.

1 . (canceled) 
     
     
         2 . A mobile communication system in which a first base station and a second base station communicate with a user equipment in parallel and the first base station and the second base station communicate with a radio network controller in parallel,
 wherein in a control plane, the first base station communicates with the user equipment and the first base station communicates with the radio network controller, and   in a user plane, the second base station communicates with the user equipment and the second base station communicates with the radio network controller.   
     
     
         3 . The mobile communication system according to  claim 2 , wherein in the user plane, the second base station communicates directly with the radio network controller. 
     
     
         4 . The mobile communication system according to  claim 2 , wherein in the user plane, the first base station communicates directly with the user equipment and the second base station communicates with the radio network controller via the first base station. 
     
     
         5 . The mobile communication system according to  claim 4 , wherein the first base station distributes, to the user equipment and the second base station, data received from the radio network controller and transmits distributed data to the user equipment and the second base station. 
     
     
         6 . The mobile communication system according to  claim 4 , wherein the first base station rearranges the order of data received from the user equipment and data received from the second base station and transmits rearranged data to the radio network controller. 
     
     
         7 . The mobile communication system according to  claim 2 , wherein the radio network controller that communicates with the first base station in the control plane is a mobility management device. 
     
     
         8 . The mobile communication system according to  claim 2 , wherein the radio network controller that communicates with the second base station in the user plane is a gateway station. 
     
     
         9 . A radio network controller that communicates with a first base station and a second base station in parallel, the first base station and the second base station communicating with a user equipment in parallel,
 wherein in a control plane, the radio network controller communicates with the first base station that communicates with the user equipment, and   in a user plane, the radio network controller communicates with the second base station that communicates with the user equipment.   
     
     
         10 . A base station that communicates with a user equipment in parallel with another base station and communicates with a radio network controller in parallel with the other base station,
 wherein in a control plane, the base station communicates with the user equipment and the radio network controller, and   in a user plane, the other base station communicates with the user equipment and the other base station communicates with the radio network controller.   
     
     
         11 . A base station that communicates with a user equipment in parallel with another base station and communicates with a radio network controller in parallel with the other base station,
 wherein in a control plane, the other base station communicates with the user equipment and the other base station communicates with the radio network controller, and   in a user plane, the base station communicates with the user equipment and the radio network controller.   
     
     
         12 . A user equipment that communicates with a first base station and a second base station in parallel, the first base station and the second base station communicating with a radio network controller,
 wherein in a control plane, the user equipment communicates with the first base station that communicates with the radio network controller, and   in a user plane, the user equipment communicates with the second base station that communicates with the radio network controller.