Cordless communication system providing optimum spectral usage for wireless networks

• US 20020085520A1
• Filed: 01/04/2001
• Published: 07/04/2002
• Est. Priority Date: 01/04/2001
• Status: Abandoned Application

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Sydon, Uwe, Dicker, Olaf, Kockmann, Juergen
• Application Number:
  US09/754,905
• Publication Number:
  US 20020085520A1
• Time in Patent Office: Days
• US Class Current: 370/335
• CPC Class Codes: H04M 1/725 Cordless telephones user interfaces specially adapted therefor H04M1/724
• CPC Class Codes: H04M 1/72513 On hold, intercom or transfer communication modes
• CPC Class Codes: H04M 2250/02 including a Bluetooth interface

Abstract

A cordless communication system for use in a wireless network that is capable of providing efficient use of available frequency spectrum within a given physical space is disclosed. The cordless communication system is comprised of a central unit and at least two remote units that are capable of direct communication with each other via wireless connections assigned and coordinated by the central unit.

Claims

1. A cordless communication system, comprising:

a central unit; and

at least two remote units, said at least two remote units being capable of radio frequency communication with said central unit and other of said at least two remote units;

wherein said central unit is capable of assigning a dedicated communication channel for enabling direct communication between selected ones of said at least two remote units.

2. The cordless communication system of claim 1, wherein each of said at least two remote units is further capable of communication with another of said at least two remote units via a radio frequency connection relayed through said central unit.

3. The cordless communication system of claim 2, wherein each of said remote units synchronizes to said central unit.

4. The cordless communication system of claim 1, wherein a first of said at least two remote units is capable of providing a request to said central unit for a direct connection with a second of said at least two remote units.

5. The cordless communication system of claim 4, wherein upon receiving a request from said first remote unit, said central unit assigns a dedicated communication channel for enabling direct communication between said first and second remote units, said second remote unit synchronizing to said first remote unit.

6. The cordless communication system of claim 1, wherein said radio communication comprises time division duplex connections utilizing a time division multiple access (TDMA) scheme.

7. The cordless communication system of claim 1, wherein said radio communication comprises a frequency hopping spread spectrum (FHSS) scheme and said central unit assigns the dedicated communication channel by assigning a specific hop sequence to selected ones of said at least two remote units.

8. The cordless communication system of claim 1, wherein said radio frequency communication comprises direct sequence spread spectrum (DSSS) scheme and said central unit assigns said dedicated communication channel by assigning a specific spreading code to selected ones of said at least two remote units.

9. The cordless communication system of claim 1, wherein said central unit provides an interface for interfacing the communication system with a network.

10. The cordless communication system of claim 9, wherein the network comprises at least one of a public switched telephone network (PSTN), an integrated services digital network (ISDN), the Internet, and an Intranet.

11. A cordless communication system, comprising:

a central unit; and

at least two remote units capable of radio frequency communication with said central unit;

wherein each of said at least two remote units is capable of communication with another of said at least two remote units via a radio frequency connection relayed through said central unit; and

wherein a first of said at least two remote units is further capable of communication with a second of said at least two remote units via a dedicated radio frequency connection assigned by said central unit for enabling direct communication between said first remote unit and said second remote unit.

12. The cordless communication system of claim 11, wherein each of said remote units synchronizes to said central unit.

13. The cordless communication system of claim 11, wherein a first of said at least two remote units is capable of providing a request to said central unit for a direct connection with a second of said at least two remote units.

14. The cordless communication system of claim 13, wherein upon receiving a request from said first remote unit, said central unit assigns a dedicated communication channel for enabling direct communication between said first and second remote units, said second remote unit synchronizing to said first remote unit.

15. The cordless communication system of claim 11, wherein said radio communication comprises time division duplex connections utilizing a time division multiple access (TDMA) scheme.

16. The cordless communication system of claim 11, wherein said radio communication comprises a frequency hopping spread spectrum (FHSS) scheme and said central unit assigns the dedicated communication channel by assigning a specific hop sequence to selected ones of said at least two remote units.

17. The cordless communication system of claim 11, wherein said radio frequency communication comprises direct sequence spread spectrum (DSSS) scheme and said central unit assigns said dedicated communication channel by assigning a specific spreading code to selected ones of said at least two remote units.

18. The cordless communication system of claim 11, wherein said central unit provides an interface for interfacing the communication system with a network.

19. The cordless communication system of claim 18, wherein the network comprises at least one of a public switched telephone network (PSTN), an integrated services digital network (ISDN), the Internet, and an Intranet.

20. A method for providing direct radio frequency communication between remote units in a cordless communication system, comprising:

providing a request to a central unit for direct radio frequency communication between a first remote unit and a second remote unit; and

initiating a direct connection between the first remote unit and the second remote unit via a dedicated communication channel assigned to the first remote unit and the second remote unit by the central unit.

21. The method of claim 20, further comprising:

determining that communication between the first remote unit and the second remote unit has ended; and

terminating the direct connection between the first remote unit and the second remote unit.

22. The method of claim 21, wherein determining that communication between the first remote unit and the second remote unit has ended comprises providing an indication to the central unit that communication between the first remote unit and the second remote unit has ended.

23. The method of claim 21, wherein initiating a direct connection between the first remote unit and the second remote unit comprises assigning the dedicated communication channel.

24. The method of claim 23, wherein radio communication within the cordless communication system comprises a frequency hopping spread spectrum (FHSS) scheme and assigning the dedicated communication channel comprises assigning a specific hop sequence to the first and second remote units.

25. The method of claim 23, wherein radio frequency communication within the cordless communication system comprises direct sequence spread spectrum (DSSS) scheme and assigning the dedicated communication channel comprises assigning a specific spreading code to the first and second remote units.