Radio communication scheme

• US 7,006,465 B2
• Filed: 12/13/2000
• Issued: 02/28/2006
• Est. Priority Date: 12/15/1999
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Toshimitsu, Kiyoshi, Ito, Kuniaki, Tsujimura, Akihiro, Obayashi, Shuichi, Shoki, Hiroki
• Primary Examiner(s): Ton, Dang
• Assistant Examiner(s): HOM, SHICK C
• Application Number:
  US09/734,598
• Publication Number:
  US 20010004604A1
• Time in Patent Office: 1,903 Days
• Field of Search: 370/328, 370/331, 370/332, 370/334, 370/339, 370/333, 455/436, 455/437, 455/438, 455/439, 455/440, 455/441, 455/442, 455/443, 455/562, 342/368, 342/371, 342/372, 343/824, 343/893
• US Class Current: 370/328
• CPC Class Codes: H01Q 1/246 specially adapted for base stations
• CPC Class Codes: H01Q 3/2676 Optically controlled phased array
• CPC Class Codes: H04W 16/32 Hierarchical cell structures
• CPC Class Codes: H04W 88/085 Access point devices with remote components

Abstract

A radio communication system having a radio base station controller which is connected to a plurality of base stations, and assigns a fixed channel to each of the radio mobile stations. The radio base station controller also controls the beam patterns of the radio base stations to communicate with the radio mobile stations. The radio base station controller, when transmitting to and receiving from the different radio mobile stations to which the same channel is assigned, controls the beam patterns so that the channels do not interfere with each other.

Claims

1. A radio base station controller which is connected to a plurality of base stations configured to generate a plurality of beam patterns and controls an antenna installed in each of the base stations and composed of a plurality of antenna devices in order to carry out a radio communication with a mobile station, the radio base station controller comprising:

(a) an antenna controller configured to control the antenna; and

(b) at least one modulating/demodulating device configured to modulate and demodulate a signal which is transmitted to and received from the mobile station,

wherein the antenna controller comprising;

a selector configured to select at least one of the antenna devices from the plurality of base stations; and

a setter configured to set a weight of the at least one of the antenna devices.

4. The radio base station controller of claim 1, wherein the mobile station is configured to run on a road, and at least a part of the plurality of base stations are arranged along the road.

2. A radio base station controller which is connected to a plurality of base stations configured to generate a plurality of beam patterns and controls an antenna installed in each of the base stations and composed of a plurality of antenna devices in order to carry out a radio communication with a mobile station, the radio base station controller comprising:

(a) an antenna controller configured to control the antenna; and

(b) at least one modulating/demodulating device configured to modulate and demodulate a signal which is transmitted to and received from the mobile station,

wherein the antenna controller comprising;

a selector configured to select at least one of the antenna devices from the plurality of base stations; and

a setter configured to set a weight of the at least one of the antenna devices,

and the setter has a device configured to determine the weight of the antenna device so that fixed channels do not interfere with each other in case where the fixed channels assigned to different mobile stations are the same.

3. A radio base station controller which is connected to a plurality of base stations configured to generate a plurality of beam patterns and controls an antenna installed in each of the base stations and composed of a plurality of antenna devices in order to carry out a radio communication with a mobile station, the radio base station controller comprising:

(a) an antenna controller configured to control the antenna; and

(b) at least one modulating/demodulating device configured to modulate and demodulate a signal which is transmitted to and received from the mobile station,

wherein the antenna controller comprising;

a selector configured to select at least one of the antenna devices from the plurality of base stations; and

a setter configured to set a weight of the at least one of the antenna devices,

and the antenna controller further has a measuring device configured to measure respective reception strength of respective antenna devices of the plurality of antenna devices in the plurality of base stations.

5. A radio communication system comprising:

(a) at least one mobile station having a device configured to select, from a plurality of same reception signals, a reception signal in which a reception state is better;

(b) a first base station controller having a device configured to detect a start of a communication between a predetermined first base station and the mobile station, a device configured to request a hand-over process to the mobile station, and a device configured to transfer a transmission signal to the mobile station to a second base station controller of a hand-over destination of the mobile station, the first base station controller connected to a first base station group including the predetermined first base station,

wherein the second base station controller has a device configured to transmit the transmission signal transferred from the first base station controller, through a predetermined second base station to the mobile station, the second base station controller connected to a second base station group including the predetermined second base station.

6. The radio communication system of claim 5, wherein the predetermined first and second base stations are arranged close to a boundary between the first and second base station controllers.

7. The radio communication system of claim 5, wherein the mobile station is configured to run on a road, and

at least a part of the first and second base station groups including the predetermined first and second base stations is positioned in a portion in which a movement destination of the mobile station on the road can be pointed out.

8. The radio communication system of claim 7, wherein the first base station controller further comprises:

a device configured to detect a speed of the mobile station; and

a device configured to change the predetermined first base station, in accordance with the detected speed.

9. The radio communication system of claim 7, wherein the first and second base station groups arranged along the road are arranged in a predetermined interval, and an interval between a first base station and a second base station which are the closest to each other is shorter than the predetermined interval.

10. The radio communication system of claim 7, wherein the first and second base station controllers select an optimal transmission rate and error correction code in accordance with a speed of the mobile station when performing a hand-over process on the mobile station, and then carry out a transmission and a reception to and from the mobile station.

11. A radio communication method comprising the steps of:

(a) detecting a start of a communication between a predetermined first base station connected to a first base station controller and a mobile station running on a road;

(b) requesting a hand-over process to the mobile station;

(c) transferring to a second base station controller, a signal to be transferred through the predetermined first base station to the mobile station;

(d) transmitting the signal to the mobile station through a predetermined second base station connected to the second base station controller; and

(e) selecting a better signal in which a reception state is better, from two signals received by the mobile station,

wherein the predetermined first and second base stations are arranged close to a boundary between the first and second base station controllers,

and the first base station controller is connected to a first base station group including the predetermined first base station,

the second base station controller is connected to a second base station group including the predetermined second base station, and

at least a part of the first and second base station groups including the predetermined first and second base stations is arranged along a portion in which a movement destination of the mobile station on the road can be pointed out.