RADIO CHANNEL CONTROLLER AND RADIO CHANNEL CONTROLLING METHOD

• US 20090117900A1
• Filed: 11/06/2008
• Published: 05/07/2009
• Est. Priority Date: 11/07/2007
• Status: Active Grant

• Current Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Original Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Inventors: Harada, Naoaki, OBATA, Kazunori
• Granted Patent: US 8,538,431 B2
• Time in Patent Office: Days
• US Class Current: 455/436
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 48/04 based on user or terminal location or mobility data, e.g. moving direction, speed

Abstract

Even when a general user'"'"'s mobile station in communication enters a use-prohibited cell, the use of the use-prohibited cell is prevented while the communication is being maintained. Regarding a mobile station 100 that enters an area of a cell C12 under handover restriction, the connection utilizing the use-prohibited cell is prohibited and handover of the mobile station is performed to an effectively-operating cell C22 covering an area including the current position of the mobile station within the use-prohibited cell and having another frequency. Alternatively, the handover is performed to a base station of an effectively-operating cell C32 belonging to another mobile communication system.

Claims

1. A radio channel controller, comprising:

a signal analyzing section which analyzes a signal received from an external node and which detects a moving request of moving from a moving source cell where a mobile station is currently positioned to a moving destination cell as a cell located in a destination of moving of the mobile station;

a discrimination section which discriminates whether or not the moving destination cell is a use-prohibited cell in which the use of the cell is prohibited, based on the moving request detected by the signal analyzing section; and

an instructing section which transmits to a corresponding destination of transmission an instruction which causes the mobile station to use an effectively-operating cell which covers an area including the current position of the mobile station, when the discrimination section discriminates that the moving destination cell is the use-prohibited cell.

2. The radio channel controller according to claim 1,

wherein the instructing section selects, as the effectively-operating cell, a cell having another frequency different from a frequency of the use-prohibited cell and covering the area including the current position of the mobile station within the use-prohibited cell, and

wherein the instructing section transmits to the corresponding destination of the transmission the instruction which causes the mobile station to use the another frequency cell as the effectively-operating cell.

3. The radio channel controller according to claim 1,

wherein the instructing section selects, as the effectively-operating cell, another cell which belongs to a mobile communication system different from a mobile communication system of the use-prohibited cell and which covers the area including the current position of the mobile station within the use-prohibited cell, and

wherein the instructing section transmits to the corresponding destination of the transmission the instruction which causes the mobile station to use the another cell as the effectively-operating cell.

4. A radio channel controlling method, comprising:

prohibiting a connection utilizing a use-prohibited cell in which the use of the cell is prohibited, when the mobile station enters an area of the use-prohibited cell that is a cell of a moving destination from a moving source cell where the mobile station is currently positioned; and

establishing a connection utilizing an effectively-operating cell which covers an area including the current position of the mobile station within the use-prohibited cell.