Wireless communication system and method of controlling same

• US 6,804,289 B2
• Filed: 02/20/2001
• Issued: 10/12/2004
• Est. Priority Date: 05/18/1995
• Status: Expired due to Fees

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Takahashi, Takumi
• Primary Examiner(s): Chin, Stephen
• Assistant Examiner(s): Kim, Kevin
• Application Number:
  US09/785,174
• Publication Number:
  US 20010008837A1
• Time in Patent Office: 1,330 Days
• Field of Search: 375/130, 375/132, 375/135, 375/136
• US Class Current: 375/132
• CPC Class Codes: H04B 2001/71365 using continuous tuning of a single frequency source
• CPC Class Codes: H04B 2001/7154 with means for preventing interference
• CPC Class Codes: H04M 1/724 User interfaces specially adapted for cordless or mobile telephones
• CPC Class Codes: H04M 1/72412 using two-way short-range wireless interfaces
• CPC Class Codes: H04M 1/725 Cordless telephones user interfaces specially adapted therefor H04M1/724
• CPC Class Codes: H04M 1/72505 Radio link set-up procedures
• CPC Class Codes: H04M 1/72513 On hold, intercom or transfer communication modes
• CPC Class Codes: H04M 1/733 with a plurality of base stations connected to a plurality of lines for selection in cordless PBX H04W84/16
• CPC Class Codes: H04W 84/10 Small scale networks; Flat hierarchical networks

Abstract

A wireless communication system has a plurality of wireless communication devices capable of communicating with one another directly without the intervention of another device, and a wireless control unit which accommodates these wireless communication devices. The wireless control unit manages the direct communication among the wireless communication devices as well as communication between the wireless control unit and the wireless communication devices.

Claims

1. A wireless communication system having a wireless communication device capable of communicating using a frequency hopping method, and a wireless control unit capable of controlling communication of said wireless communication device, said wireless communication device comprising:

first communication means for communicating with an other wireless communication device without relay of said wireless control unit; and

second communication means for communicating with said wireless control unit while the first communication means communicates with the other wireless communication device;

wherein the second communication means communicates with said wireless control unit using a different frequency hopping pattern than a frequency hopping pattern that the first communication means uses to communicate with the other wireless communication device.

2. The system according to claim 1, further comprising:

third communication means for performing communication with a destination via said wireless control unit,

wherein said wireless control unit comprises a management means for managing information related to communication via said wireless control unit and information related to communication without relay of said wireless control unit.

3. The system according to claim 2, wherein said management means has:

memory means for storing status of communication of said wireless communication device; and

detecting means for detecting a communication request to a wireless communication device in a communicating state using first communication means;

wherein said wireless communication device is subjected to switching control in dependence upon results of detection by said detecting means and the status of communication stored by said memory.

4. The system according to claim 2, wherein said management means manages hopping patterns being used by said fast and third communication means.

5. The system according to claim 1, wherein said second communication means communicates control information.

6. A wireless frequency hopping communication device employed in a wireless control unit, said wireless communication device comprising:

first communication means for communicating wit an other wireless communication device without relay of said wireless control unit; and

second communication means for communicating with said wireless control unit while the first communication means communicates with the other wireless communication device;

wherein the second communication means communicates with said wireless control unit using a different frequency hopping pattern than a frequency hopping pattern that the first communication means uses to communicate with the other wireless communication device.

7. The device according to claim 6, wherein a hopping pattern used by said first communication means is notified by said wireless control unit.

8. The device according to claim 6, wherein said second communication means communicates control information.

9. A method of controlling a wireless communication system having a wireless communication device capable of communicating using a frequency hopping method, and a wireless control unit capable of controlling communication of said wireless communication device, the control method of a wireless communication device comprising:

a first communication step of communicating with an other wireless communication device without relay of said wireless cannot unit; and

a second communication step of communicating with said wireless control unit while the first communication step communicants with the other wireless communication device;

wherein the second communication step communicates with said wireless control unit using a different frequency hopping pattern than a frequency hopping pattern that the first communication step uses to communicate with the other wireless communication device.

10. The method according to claim 9, further comprising:

a third communication step of performing communication with a destination via said wireless control unit;

wherein said wireless control unit performs a management step of managing information related to communication via said wireless control unit and information related to communication without relay of said wireless control unit.

11. The method according to claim 10, wherein said management step comprises:

a storing step of storing status of communication of said wireless communication device into a memory; and

a detecting step of detecting a communication request to a wireless communication device in a communicating slate using fast communication step;

wherein said wireless communication device is subjected to switching control in dependence upon results of detection at said detecting step and the status of communication stored at said storing step.

12. The method according to claim 10, wherein at said management step, hopping patterns which are used by said first and third communication step are managed.

13. The system according to claim 9, wherein at said second communication step, control information are communicating.

14. A method of controlling a wireless frequency hopping communication device accommodated in a wireless control unit, comprising:

a first communication step of communicating with an other wireless communication device without relay of said wireless control unit; and

a second communication step of communicating with said wireless control unit while the first communication step communicates with the other wireless communication device;

wherein the second communication step communicates with said wireless control unit using a different frequency hopping pattern than a frequency hopping pattern that the first communication step uses to communicate with the other wireless communication device.

15. The method according to claim 14, wherein a hopping pattern used by said first communication step is notified by said wireless control unit.

16. The method according to claim 14, wherein the control information is communicated in said second communication step.

17. A method of controlling a wireless communication system including a first wireless communication device, a second wireless communication device, and a wireless control unit that manages communication transmission in the wireless communication system, the method comprising the steps of:

analyzing a communication request from the first wireless communication device;

when the communication request is a request to originate an outside-line call;

transmitting communications data between the first wireless communications device end the wireless control unit;

when the communication request is a request to originate an extension call;

determining traffic conditions in the wireless communication system based on a number of pending extension calls in the wireless communication system;

transmitting communications data between the second wireless communication device and the first wireless communication device;

transmitting communications data between the first wireless communication device and the wireless control unit before originating the extension call; and

originating the extension call when the first wireless communication device receives a predetermined enable signal from the wireless control unit.

18. The method according to claim 17, wherein the communication request canceled when the first wireless communication device does not receive the predetermined enable signal from the wireless control unit.

19. The method according to claim 17, wherein the wireless control unit issues the predetermined enable signal based on the number of pending extension calls in the wireless communication system.

20. The method according to claim 17, wherein the wireless control unit issues the predetermined enable signal based on an attribute of the first wireless communication device.

21. A wireless communication system having a wireless communication device and a wireless control unit controlling communication of said wireless communication device, comprising:

first communication means for communicating with an other wireless communication device without relay to said wireless control unit; and

second communication means for communicating with said wireless control unit,

wherein communication of said first communication means and communication of said second communication means employ time division switching and frequency hopping such that said second communication means can communicate with said wireless control unit while said first communication means communicates with the other wireless communication device.

22. A wireless communication device employed in a wireless control unit, comprising:

first communication means for communicating with an other wireless communication device without relay to said wireless control unit; and

second communication means for communicating with said wireless control unit,

wherein communication of said first communication means and communication of said second communication means employ time division switching and frequency hopping such that said second communication means can communicate with said wireless control unit while said first communication means communicates with the other wireless communication device.

23. A method of controlling a wireless communication device accommodated in a wireless control unit, comprising:

a first communication step for communicating with an other wireless communication device without relay to said wireless control unit; and

a second communication step for communicating with said wireless control unit,

wherein communication of said firs;

communication step and communication of said second communication step employ time division switching and frequency hopping such that said second communication step can communicate with said wireless control unit while said first communication step communicates with the other wireless communication device.