Apparatus and method for digital subscriber line signal communications

• US 20020034220A1
• Filed: 09/21/2001
• Published: 03/21/2002
• Est. Priority Date: 09/21/2000
• Status: Abandoned Application

• Current Assignee: DragonWave Incorporated
• Original Assignee: DragonWave Incorporated
• Inventors: Duxbury, Tom
• Application Number:
  US09/956,855
• Publication Number:
  US 20020034220A1
• Time in Patent Office: Days
• US Class Current: 375/222
• CPC Class Codes: H04B 1/40 Circuits
• CPC Class Codes: H04B 1/52 Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
• CPC Class Codes: H04L 5/023 Multiplexing of multicarrier modulation signals multicarrier modulation H04L27/2601

Abstract

A communication system is provided for Digital Subscriber Line (DSL) communications comprising a radio transmitter for receiving a DSL signal and having a converter for converting the DSL signal into an RF signal for wireless transmission. A radio receiver is arranged to receive the RF signal containing the DSL signal and convert the RF signal into the original DSL signal for continued transmission.

Claims

1. A communication system comprising:

(a) a generator for generating a digital subscriber line (DSL) signal, and

(b) a radio transmitter arranged to receive the DSL signal and having a converter for converting the DSL signal into an RF signal for wireless transmission.

2. A communication system as claimed in claim 1, wherein the radio transmitter further comprises an antenna for radiating the RF signal.

3. A communication system as claimed in claim 1, wherein the DSL signal is contained in a frequency band above the audio frequency band allocated for voice channels on the telephone subscriber line.

4. A communication system as claimed in claim 3, wherein the generator is arranged to output the generated DSL signal onto a telephone subscriber line.

5. A communication system as claimed in claim 1 further including a frequency filter for removing voice band frequency signals from the signals passed from the generator to the radio transmitter.

6. A communication system as claimed in of claim 1, further including a frequency separator for separating DSL signals from voice band signals and arranged to pass the separated DSL signals to the radio transmitter.

7. A communication system as claimed in claim 6, wherein the frequency separator is arranged to pass voice band signals to one of a digital loop carrier (DLC) and a high frequency loading coil, and to pass the DSL signal to the radio transmitter.

8. A communication system as claimed in claim 1, wherein the generator generates the DSL signal by amplitude and/or phase modulating at least one carrier frequency.

9. A communication system as claimed in claim 8, wherein the generator generates the DSL signal by amplitude and/or phase modulating a plurality of carrier frequencies.

10. A communication system as claimed in claim 1, wherein the generator generates the DSL signal by performing discrete multi-tone modulation (DMT) and/or quadrature phase amplitude modulation (QAM).

11. A communication system as claimed in claim 1, wherein the generator is arranged to generate a digital subscriber line is (DSL) signal selected from the group consisting of:

Asymmetric Digital Subscriber Line (ADSL), Rate Adaptive ADSL (RADSL), High Data Rate DSL (HDSL), Symmetric Digital Subscriber Line (SDSL), Very High Data Rate DSL (VDSL) and very High Speed ADSL (VADSL).

12. A communication system as claimed in claim 1, further comprising a radio receiver for receiving an RF signal transmitted by the radio transmitter, the receiver having means for recovering a digital subscriber line (DSL) signal from the RF signal.

13. A communication system as claimed in claim 12, wherein the receiver is coupled to transmit the DSL signal onto a telephone subscriber line.

14. A communication system as claimed in claim 12, wherein said receiver is coupled to transmit the DSL signal to one of a central office, a service provider and subscriber equipment.

15. A communication system as claimed in claim 14, wherein the receiver is connected to one of the central office, the service provider and the subscriber equipment, by a telephone subscriber line.

16. A communication system as claimed in claim 1, wherein the radio transmitter is arranged to receive DSL signals from a central office or subscriber equipment.

18. A communication system as claimed in claim 13, further comprising a second generator for generating a DSL signal, the DSL signal being transmitted on the same telephone subscriber line as the DSL signal output by the receiver, and a second radio transmitter having a converter for converting the DSL signal into a signal for wireless transmission.

19. A communication system as claimed in claim 18, wherein the first transmitter is arranged to receive DSL signals from a telephone subscriber line, and said system further comprises a second radio receiver for receiving the RF signal transmitted by the second radio transmitter, the second receiver having means for converting the RF signal into a DSL signal and outputting the DSL signal onto the same telephone subscriber line used for carrying DSL signals from the first generator to the first transmitter.

20. A communication system as claimed in claim 17, wherein the second generator is arranged to output the generated DSL signal onto the telephone subscriber line in the opposite direction to the DSL signal generated by the first generator.

21. A communication system as claimed in claim 19, wherein said second receiver is arranged to output the DSL signal onto said telephone subscriber in the opposite direction to the DSL signal output by said first receiver.

22. A communication system as claimed in claim 1, wherein said generator is coupled to said radio transmitter by a wire line and is arranged to output the generated DSL signal onto said wire line.

24. A wireless transmitter as claimed in claim 23, wherein said converter means includes means for generating an RF carrier signal carrying said DSL signal.

25. A wireless transmitter as claimed in claim 23, wherein said converter means includes modulating means for modulating an RF carrier signal with said DSL signal.

26. A wireless transmitter as claimed in claim 23, further comprising a coupler adapted to couple said transmitter to a transmission line for carrying a DSL signal.

27. A wireless transmitter as claimed in claim 26, wherein said coupler is adapted to couple an input of said transmitter to a telephone subscriber line.

28. A wireless transmitter as claimed in claim 23, wherein the DSL signal comprises at least one of an ADSL formatted signal and a VDSL formatted signal.

30. A radio receiver as claimed in claim 29, further comprising a coupler for coupling the output of said receiver to a transmission line.

31. A radio receiver as claimed in claim 30, wherein said converter is arranged to convert the RF signal into a DSL signal for transmission on a telephone subscriber line, and said coupler is adapted to couple the output to a telephone subscriber line.

32. A radio receiver as claimed in claim 29, wherein said converter comprises means for separating a DSL signal contained within said RF signal from an RF carrier signal.

33. A radio receiver as claimed in claim 32, wherein said converter comprises demodulating means for demodulating the RF signal.

34. A radio receiver as claimed in claim 29, wherein the RF signal contains at least one of an ADSL and a VDSL formatted signal.

36. A radio transceiver as claimed in claim 35, wherein at least one frequency of the DSL signal received by the converter of the radio transmitter is different to at least one frequency of the DSL signal output from the converter of the radio receiver.

40. A method as claimed in claim 39 wherein the DSL signal comprises an ADSL or a VDSL formatted signal.

17. A communication system as claimed in 16, wherein the DSL signal from the central office or subscriber equipment is transmitted to the radio transmitter by a telephone subscriber line.

23. A wireless transmitter for use in a DSL communication system, comprising converter means for converting a DSL signal into an RF signal carrying data contained within the DSL signal, and radiating means for transmitting the RF signal.

29. A radio receiver for use in a digital subscriber line communication system comprising a receiver for receiving a wire less RF signal containing a DSL signal, and a converter for converting the RF signal into a different signal for further transmission of data contained within the DSL signal.

35. A radio transceiver for use in a DSL communication system comprising a radio receiver having means for receiving a wireless RF signal containing DSL data, and a converter for converting the RF signal into a different signal for further transmission of the DSL data, and a radio transmitter having means for converting a DSL signal into an RF signal carrying data contained within the DSL signal and radiating means for transmitting the RF signal.

37. A method of conditioning a DSL signal comprising converting the DSL signal into an RP signal for wireless transmission.

38. A method of conveying a DSL signal comprising converting the DSL signal into an RF signal and wirelessly transmitting the RF signal.

39. A method of conveying a DSL signal comprising receiving a wireless RF signal containing a DSL signal and recovering the DSL signal from the RF signal.

41. A wireless radio wave carrier Carrying a DSL signal.