Apparatus and method for suppressing interference of reverse link in in-building mobile communication system

• US 20030103474A1
• Filed: 09/18/2002
• Published: 06/05/2003
• Est. Priority Date: 09/26/2001
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Kyung-Hwan
• Granted Patent: US 7,324,471 B2
• Time in Patent Office: Days
• US Class Current: 370/320
• CPC Class Codes: H04B 1/7103 the interference being multiple access interference
• CPC Class Codes: H04B 2201/709709 Methods of preventing interference
• CPC Class Codes: H04B 7/2606 Arrangements for base station coverage control, e.g. by using relays in tunnels
• CPC Class Codes: H04W 88/085 Access point devices with remote components

Abstract

An in-building mobile communication system. The in-building mobile communication system comprising a transmission/reception repeater for performing both transmission and reception via an antenna, with respect to a terminal, the transmission/reception repeater being installed in the center of a building, at least one transmission repeater for performing only transmission, with respect to the terminal, which is installed a certain preset distance away from the transmission/reception repeater, the transmission repeater facing the transmission/reception repeater, at least one transmitter/receiver unit connected in parallel with the repeaters, and a base station device connected with the transmitter/receiver unit.

Claims

1. An in-building mobile communication system, the system comprising:

a first transmission/reception repeater being installed substantially at a center of a building, said first transmission/reception repeater performing transmission to a plurality of terminals through a transmission/reception antenna and performing reception from a plurality of terminals through the transmission/reception antenna;

at least one transmission repeater being installed a preset distance away from said first transmission/reception repeater, said at least one transmission repeater performing transmission to at least one of the terminals, said at least one transmission repeater not performing reception from any of the terminals;

at least one transmitter/receiver unit being connected in parallel with said first transmission/reception repeater and with said at least one transmission repeater; and

a base station device being connected with said at least one transmitter/receiver unit.

2. The system of claim 1, said at least one transmission repeater facing said first transmission/reception repeater.

3. The system of claim 1, said at least one transmission repeater comprising:

a transmission antenna; and

a transmission amplifier amplifying a signal outputted from said at least one transmitter/receiver unit to perform propagation of a forward link signal through said transmission antenna.

4. The system of claim 3, the preset distance between said at least one transmission repeater and said first transmission/reception repeater corresponding to about 5 meters to 10 meters.

5. The system of claim 3, further comprising a second transmission/reception repeater being installed in a position spaced away from said first transmission/reception repeater, the position being near the center of the building.

6. The system of claim 5, said second transmission/reception repeater being installed when an obstacle exists near a center of a building, the obstacle blocking radio frequency signals.

7. The system of claim 3, further comprising a second transmission/reception repeater, the preset distance between said at least one transmission repeater and said first transmission/reception repeater corresponding to about 5 meters to 10 meters, said second transmission/reception repeater being installed in a position which is more than 10 meters away from said first transmission/reception repeater.

8. The system of claim 1, said first transmission/reception repeater comprising:

a transmission amplifier amplifying a signal outputted from said at least one transmitter/receiver unit;

a duplexed being connected between said transmission amplifier and the transmission/reception antenna, said duplexed performing bandpass-filtering of a transmission signal of said transmission amplifier and outputting the bandpass-filtered signal to the transmission/reception antenna, said duplexed performing bandpass-filtering of a reception signal received through the transmission/reception antenna; and

a reception amplifier amplifying the reception signal received from said duplexed and outputting the amplified signal to said at least one transmitter/receiver unit.

9. The system of claim 8, the preset distance between said at least one transmission repeater and said first transmission/reception repeater corresponding to about 5 meters to 10 meters.

10. The system of claim 8, further comprising a second transmission/reception repeater being installed in a position spaced away from said first transmission/reception repeater, the position being near the center of the building.

11. The system of claim 10, said second transmission/reception repeater being installed when an obstacle exists near a center of a building, the obstacle blocking radio frequency signals.

12. The system of claim 8, further comprising a second transmission/reception repeater, the preset distance between said at least one transmission repeater and said first transmission/reception repeater corresponding to about 5 meters to 10 meters, said second transmission/reception repeater being installed in a position more than 10 meters away from said first transmission/reception repeater.

13. A method, comprising:

suppressing interference of a reverse reception signal in an in-building mobile communication system having at least one repeater performing mobile communication with a terminal, at least one transmitter/receiver unit connected with the at least one repeater, and a base station device connected with the at least one transmitter/receiver unit, said suppressing comprising;

performing forward and reverse communication with the terminal through a transmission/reception repeater installed substantially at a center of a building; and

performing forward communication with the terminal through a transmission repeater installed a preset distance away from the transmission/reception repeater.

14. The method of claim 13, the transmission repeater facing the transmission/reception repeater.

15. A communication apparatus, comprising:

at least one transmission/reception repeater being installed substantially at a center of a building, said first transmission/reception repeater performing transmission to a plurality of terminals through a transmission/reception antenna and performing reception from a plurality of terminals through the transmission/reception antenna; and

at least one transmission repeater being installed at least a preset distance away from said first transmission/reception repeater, said at least one transmission repeater performing transmission to at least one of the terminals, said at least one transmission repeater not performing reception from any of the terminals.

16. The apparatus of claim 15, the terminals being selected from among mobile telephones and portable computers.

17. The apparatus of claim 15, further comprising:

at least one transmitter/receiver unit being connected with said first transmission/reception repeater and with said at least one transmission repeater; and

a base station device being connected with said at least one transmitter/receiver unit, said at least one transmission repeater facing said first transmission/reception repeater.

18. The apparatus of claim 17, said at least one transmission repeater comprising:

a transmission antenna; and

a transmission amplifier amplifying a signal outputted from said at least one transmitter/receiver unit to perform propagation of a forward link signal through said transmission antenna.

19. The apparatus of claim 18, the preset distance between said at least one transmission repeater and said first transmission/reception repeater corresponding to about 5 meters to 10 meters.

20. The apparatus of claim 19, further comprising a second transmission/reception repeater being installed in a position spaced a predetermined distance away from said first transmission/reception repeater, the predetermined distance being greater than the preset distance.