Wireless communication system using frequency hopping, and method of controlling the system

• US 5,870,391 A
• Filed: 03/20/1997
• Issued: 02/09/1999
• Est. Priority Date: 03/25/1996
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Nago, Hidetada
• Primary Examiner(s): Nguyen, Chau
• Assistant Examiner(s): VANDERPUYE, KENNETH N
• Application Number:
  US08/822,615
• Time in Patent Office: 691 Days
• Field of Search: 375/202, 375/200, 375/201, 375/203, 370/329, 370/344, 370/480, 370/481, 370/503, 370/330, 370/350, 370/343, 455/434, 455/515, 455/502
• US Class Current: 370/330
• CPC Class Codes: H04B 1/713 using frequency hopping
• CPC Class Codes: H04B 1/7143 Arrangements for generation of hop patterns
• CPC Class Codes: H04B 2001/71563 Acquisition
• CPC Class Codes: H04B 7/2634 for channel frequency control

Abstract

A common frequency hopping pattern is used for a control channel containing control information, such as communication control information, e.g., connection and disconnection of wireless communication, in a wireless communication system, thereby reducing the load of a controlling station as well as lowering the price of the controlling station.

Claims

1. A wireless communication system capable of including a plurality of wireless communication apparatuses which communicate communication frames including control information and communication information by using frequency hopping, said system comprising:

control communicating means for communicating control information in accordance with a specified first hopping pattern of plural frequency hopping patterns, which is used in said plurality of wireless communication apparatuses;

synchronization means for synchronizing the communication frames on the basis of the control information communicated by said control communicating means;

information communicating means for communicating communication information in accordance with an arbitrary second hopping pattern of the plural frequency hopping patterns, using the communication frames synchronized by said synchronization means; and

control means for controlling the communication of the control information and communication information while switching over between the first hopping pattern and the second hopping pattern by said control communicating means and said information communicating means.

2. The wireless communication system according to claim 1, wherein the second hopping pattern is determined each time when performing communication.

3. The wireless communication system according to claim 1 further comprising a controlling station for controlling communication between wireless communication terminals.

4. The wireless communication system according to claim 3, wherein the second hopping pattern is determined by said controlling station.

5. The wireless communication system according to claim 3, wherein said information communicating means communicates independent of said controlling station.

6. The wireless communication system according to claim 1, wherein said synchronization means synchronizes on the basis of synchronizing information included in the control information.

7. The wireless communication system according to claim 1, wherein said communication information includes audio information.

8. The wireless communication system according to claim 1, wherein said communication information includes data information other than audio information.

9. The wireless communication system according to claim 1, wherein the first hopping pattern and the second hopping pattern are different.

10. A wireless communication apparatus of a wireless communication system which communicates communication frames including control information and communication information by using frequency hopping, said apparatus comprising:

control communicating means for communicating control information in accordance with a specified first hopping pattern of plural frequency hopping patterns which is used in a plurality of wireless communication apparatuses;

synchronization means for synchronizing the communication frames on the basis of the control information communicated by said control communicating means;

information communicating means for communicating communication information in accordance with an arbitrary second hopping pattern of the plural frequency hopping patterns, using the communication frames synchronized by said synchronization means; and

control means for controlling the communication of the control information and communication information while switching over between the first hopping pattern and the second hopping pattern by said control communicating means and said information communicating means.

11. The wireless communication system according to claim 10, wherein the second hopping pattern is determined each time when performing communication.

12. The wireless communication system according to claim 10 further comprising a controlling station for controlling communication between wireless communication terminals.

13. The wireless communication system according to claim 12, wherein the second hopping pattern is determined by said controlling station.

14. The wireless communication system according to claim 12, wherein said information communicating means communicates independent of said controlling station.

15. The wireless communication system according to claim 10, wherein said synchronization means synchronizes on the basis of synchronizing information included in the control information.

16. The wireless communication system according to claim 10, wherein said communication information includes audio information.

17. The wireless communication system according to claim 10, wherein said communication information includes data information other than audio information.

18. The wireless communication system according to claim 10, wherein the first hopping pattern and the second hopping pattern are different.

19. A control method of a wireless communication system including a plurality of wireless communication apparatuses which communicate communication frames including control information and communication information by using frequency hopping, said method comprising:

a control communicating step of communicating control information in accordance with a specified first hopping pattern of plural frequency hopping patterns, which is used in said plurality of wireless communication apparatuses;

a synchronization step of synchronizing the communication frames on the basis of the control information communicated in said control communicating step;

an information communicating step of communicating communication information in accordance with an arbitrary second hopping pattern of the plural frequency patterns, using the communication frames synchronized in said synchronization step; and

a control step of controlling communication of the control information and communication information while switching over between the first hopping pattern and the second hopping pattern in said control communicating step and said information communicating step.

20. The control method according to claim 19, wherein the second hopping pattern is determined each time when performing communication.

21. The control method according to claim 19, wherein said wireless communication system has a controlling station for controlling communication between wireless communication terminals.

22. The control method according to claim 21, wherein the second hopping pattern is determined by said controlling station.

23. The control method according to claim 21, wherein, at said information communicating step, communication is performed independent of said controlling station.

24. The control method according to claim 19, wherein said synchronization step includes synchronizing on the basis of synchronization information included in the control information.

25. The control method according to claim 19, wherein said communication information includes audio information.

26. The control method according to claim 19, wherein said communication information includes data information other than audio information.

27. The control method according to claim 19, wherein, the first hopping pattern and the second hopping pattern are different.

28. A control method of a wireless communication apparatus of a wireless communication system which communicates communication frames including control information and communication information by using frequency hopping, said method comprising:

a control communicating step of communicating control information in accordance with a specified first hopping pattern of plural frequency hopping patterns, which is used in a plurality of wireless communication apparatuses;

a synchronization step of synchronizing the communication frames on the basis of the control information communicated in said control communicating step;

an information communicating step of communicating communication information in accordance with an arbitrary second hopping pattern of the plural frequency hopping patterns, using the communication frames synchronized in said synchronization step; and

a control step of controlling communication of the control information and communication information while switching over between the first hopping pattern and the second hopping pattern in said control communicating step and said information communicating step.

29. The control method according to claim 28, wherein the second hopping pattern is determined each time when performing communication.

30. The control method according to claim 28, wherein said wireless communication system has a controlling station for controlling communication between wireless communication terminals.

31. The control method according to claim 30, wherein the second hopping pattern is determined by said controlling station.

32. The control method according to claim 30, wherein, at said information communicating step, communication is performed independent of said controlling station.

33. The control method according to claim 28, wherein said synchronization step includes synchronizing on the basis of synchronization information included in the control information.

34. The control method according to claim 28, wherein said communication information includes audio information.

35. The control method according to claim 28, wherein said communication information includes data information other than audio information.

36. The control method according to claim 28, wherein the first hopping pattern and the second hopping pattern are different.