Radio communication device and radio communication method

• US 6,463,261 B1
• Filed: 07/30/1999
• Issued: 10/08/2002
• Est. Priority Date: 10/20/1997
• Status: Expired due to Fees

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Hiramatsu, Katsuhiko, Miyoshi, Kenichi
• Primary Examiner(s): Urban, Edward F.
• Assistant Examiner(s): CRAVER, CHARLES R
• Application Number:
  US09/319,940
• Time in Patent Office: 1,166 Days
• Field of Search: 455/503, 455/445, 455/422, 455/450, 455/62, 455/63, 455/59, 455/60, 455/447, 455/448, 455/452, 455/18, 455/19, 455/67.3, 370/350, 370/503, 370/337, 370/347, 370/519, 370/508
• US Class Current: 455/63.1
• CPC Class Codes: H04B 7/2681 Synchronisation of a mobile station with one base station
• CPC Class Codes: H04W 56/001 Synchronization between nodes
• CPC Class Codes: H04W 56/003 Arrangements to increase tolerance to errors in transmission or reception timing
• CPC Class Codes: H04W 92/10 between terminal device and access point, i.e. wireless air interface

Abstract

The radio communication apparatus of the present invention changes the transmission timing of a mobile station of the self station with respect to the transmission timing of a mobile station of a peripheral transmission station. This makes it possible to extract a received signal from the self station even if the mobile station of the self station and the mobile station of the peripheral transmission station use identical unique words.

Claims

1. A radio communication apparatus, comprising:

an interference mobile station transmission timing detector that detects the transmission timing of an interference mobile station communicating with a peripheral station of a base station;

a desired mobile station transmission timing calculator that determines the transmission timing of a desired mobile station communicating with the base station, the determined transmission timing of the desired mobile station provided with an offset over the transmission timing of the interference mobile station; and

a desired mobile station transmission timing controller that controls the transmission timing of the desired mobile station according to the determined transmission timing of the desired mobile station.

2. The radio communication apparatus according to claim 1, wherein the desired mobile station transmission timing controller comprises a transmission timing information attachment device that attaches transmission timing control information to be transmitted by the desired station to a transmission signal from the base station to the desired mobile station.

3. The radio communication apparatus according to claim 1, wherein the desired mobile station transmission timing calculator calculates the mobile station transmission timing within a range in which transmission is not carried out outside a transmission slot assigned to the desired mobile station.

4. The radio communication apparatus according to claim 1, wherein the interference mobile station transmission timing detector comprises:

an interference station control channel transmission timing detector that detects only the transmission timing of the control channel of a transmission signal transmitted from the interference station to the interference mobile station.

5. The radio communication apparatus according to claim 1, wherein the desired mobile station transmission timing controller comprises a communication channel transmission timing controller and a control channel transmission timing controller, and only changes the transmission timing of communication channels between the desired mobile station and interference mobile station and does not change the transmission timing of control channels between the desired mobile station and interference mobile station.

6. The radio communication apparatus according to claim, 1, wherein the desired mobile station transmission timing calculator calculates the mobile station transmission timing that has an offset value that varies from one station to another.

7. The radio communication apparatus according to claim 1, wherein the desired mobile station transmission timing calculator calculates the desired mobile station transmission timing in such a way that the transmission timing of the desired mobile station goes behind that of the interference mobile station.

8. A radio communication apparatus, comprising:

an interference mobile station transmission timing detector that detects the transmission timing of a interference mobile station;

a desired mobile station transmission timing calculator that determines the transmission timing of the desired mobile station, the determined transmission timing of the desired mobile station provided with an offset over the transmission timing of the interference mobile station; and

a desired mobile station transmission timing controller that controls the transmission timing of the desired mobile station according to the determined transmission timing of the desired mobile station.

9. A radio communication apparatus, comprising:

an interference mobile station transmission timing detector that detects the transmission timing of an interference mobile station;

a desired mobile station transmission timing detector that detects the transmission timing of a desired mobile station;

a desired mobile station transmission timing calculator that determines the transmission timing of the desired mobile station, the determined transmission timing of the desired mobile station provided with an offset over the transmission timing of the interference mobile station; and

a base station transmission timing controller that controls the transmission timing of the base station according to the determined transmission timing of the desired mobile station.

10. A radio communication apparatus, comprising:

an interference station transmission timing detector that detects the transmission timing of an interference station;

a desired mobile station transmission timing detector that detects the transmission timing of a desired mobile station;

a desired mobile station transmission timing calculator that calculates the transmission timing of the desired mobile station, the calculated transmission timing of the desired mobile station provided with an offset over the transmission timing of the interference station; and

a base station transmission timing controller that controls the transmission timing of the base station according to the calculated transmission timing of the desired mobile station.

11. A radio communication apparatus, comprising;

an interference mobile station transmission timing detector that detects the transmission timing of an interference mobile station;

a base station transmission timing detector that detects the transmission timing of the base station;

a desired mobile station transmission timing calculator that determines the transmission timing of a desired mobile station, the determined transmission timing of the desired mobile station provided with an offset over the transmission timing of the interference mobile station; and

a base station transmission timing controller that controls the transmission timing of the base station according to the determined transmission timing of the desired mobile station.

12. A radio communication method, comprising:

detecting the transmission timing of an interference mobile station communicating with a peripheral station of a base station;

determining the transmission timing of a desired mobile station communicating with the base station, the determined transmission timing of the desired mobile station provided with an offset over the transmission timing of the interference mobile station; and

controlling the transmission timing of the desired mobile station according to the determined transmission timing of the desired mobile station.

13. The radio communication method according to claim 12, comprising:

attaching transmission timing control information to be transmitted by the desired station to a transmission signal from the base station to the desired mobile station.

14. The radio communication method according to claim 12, wherein determining the transmission timing of the desired mobile station calculates the mobile station transmission timing within a range in which transmission is not carried out outside a transmission slot assigned to the desired mobile station.

15. The radio communication method according to claim 12 wherein detecting the interference mobile station transmission timing comprises:

detecting only the transmission timing of the control channel of a transmission signal transmitted from the interference station to the interference mobile station.

16. The radio communication method according to claim 12, which only changes the transmission timing of communication channels between the desired mobile station and interference mobile station and does not change the transmission timing of control channels between the desired mobile station and interference mobile station.

17. The radio communication method according to claim 12, wherein determining the desired mobile station transmission timing calculates the mobile station transmission timing that has an offset value that varies from one station to another.

18. The radio communication method according to claim, 12, wherein determining the desired mobile station transmission timing calculates the desired mobile station transmission timing in such a way that the transmission timing of the desired mobile station goes behind that of the interference mobile station.

19. A radio communication method, comprising:

detecting the transmission timing of an interference mobile station;

detecting the transmission timing of a desired mobile station;

determining the transmission timing of the desired mobile station, the determined transmission timing of the desired mobile station provided with an offset over the transmission timing of the interference mobile station; and

controlling the transmission timing of the desired mobile station according to the determined transmission timing of the desired mobile station.

20. A radio communication method, comprising:

detecting the transmission timing of an interference station;

detecting the transmission timing of a desired mobile station;

determining the transmission timing of the desired mobile station, the determined transmission timing of the desired mobile station provided with an offset over the transmission timing of the interference station; and

controlling the transmission timing of a base station according to the transmission timing of the desired mobile station.

21. A radio communication method, comprising:

detecting the transmission timing of an interference station;

detecting the transmission timing of a desired mobile station;

determining the transmission timing of the desired mobile station, the determined transmission timing of the desired mobile station provided with an offset over the transmission timing of the interference station; and

controlling the transmission timing of the base station according to the transmission timing of the desired mobile station.

22. A radio communication method, comprising;

detecting the transmission of timing of an interference mobile station;

detecting the transmission of a base station;

determining the transmission timing of a desired mobile station, the determined transmission timing of the desired mobile station provided with an offset over the transmission timing of the interference mobile station; and

controlling the transmission timing if the base station according to the transmission timing of the desired mobile station.