Multicarrier demux/demod (MCDD) wireless network architecture

• US 6,661,781 B1
• Filed: 11/19/1999
• Issued: 12/09/2003
• Est. Priority Date: 07/15/1997
• Status: Expired due to Term

• Current Assignee: COMSAT Corporation (Reorganized ISA SA)
• Original Assignee: COMSAT Corporation (Reorganized ISA SA)
• Inventors: Chitre, Dattakumar M., Sayegh, Soheil I.
• Primary Examiner(s): Rao, Seema S.
• Assistant Examiner(s): Duong, Frank
• Application Number:
  US09/424,266
• Time in Patent Office: 1,481 Days
• Field of Search: 370/319, 370/321, 370/326, 370/329, 370/330, 370/337, 370/344, 370/347, 370/348, 370/395.1, 370/322, 370/436, 370/442, 370/443, 370/343, 370/468, 455/450, 455/451, 455/452
• US Class Current: 370/330
• CPC Class Codes: H03M 13/15 Cyclic codes, i.e. cyclic shifts of codewords produce other codewords, e.g. codes defined by a generator polynomial, Bose-Chaudhuri-Hocquenghem [BCH] codes H03M13/17 takes precedence
• CPC Class Codes: H03M 13/23 using convolutional codes, e.g. unit memory codes
• CPC Class Codes: H03M 13/27 using interleaving techniques
• CPC Class Codes: H03M 13/29 combining two or more codes or code structures, e.g. product codes, generalised product codes, concatenated codes, inner and outer codes
• CPC Class Codes: H03M 13/35 Unequal or adaptive error protection, e.g. by providing a different level of protection according to significance of source information or by adapting the coding according to the change of transmission channel characteristics
• CPC Class Codes: H03M 13/6312 Error control coding in combination with data compression
• CPC Class Codes: H03M 7/30 Compression speech analysis-synthesis for redundancy reduction G10L19/00; for image communication H04N; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
• CPC Class Codes: H04B 7/18532 Arrangements for managing transmission, i.e. for transporting data or a signalling message
• CPC Class Codes: H04B 7/1858 Arrangements for data transmission on the physical system, i.e. for data bit transmission between network components
• CPC Class Codes: H04B 7/18582 Arrangements for data linking, i.e. for data framing, for error recovery, for multiple access
• CPC Class Codes: H04J 3/0608 Detectors therefor, e.g. correlators, state machines
• CPC Class Codes: H04L 12/5601 Transfer mode dependent, e.g. ATM
• CPC Class Codes: H04L 2012/5607 Radio
• CPC Class Codes: H04L 2012/5608 Satellite
• CPC Class Codes: H04L 2012/5616 Terminal equipment, e.g. codecs, synch.
• CPC Class Codes: H04L 2012/5627 Fault tolerance and recovery
• CPC Class Codes: H04L 2012/5632 Bandwidth allocation
• CPC Class Codes: H04L 2012/5647 Cell loss
• CPC Class Codes: H04L 2012/5649 Cell delay or jitter
• CPC Class Codes: H04L 2012/5662 Macrocells or frames
• CPC Class Codes: H04L 2012/5675 : Timeslot assignment, e.g. TDMA
• CPC Class Codes: H04L 5/0005 : Time-frequency
• CPC Class Codes: H04L 5/0039 : Frequency-contiguous, i.e. with no allocation of frequencies for one user or terminal between the frequencies allocated to another
• CPC Class Codes: H04L 5/0041 : Frequency-non-contiguous
• CPC Class Codes: H04L 5/0046 : Determination of how many bits are transmitted on different sub-channels
• CPC Class Codes: H04L 5/0064 : Rate requirement of the data, e.g. scalable bandwidth, data priority
• CPC Class Codes: H04L 5/023 : Multiplexing of multicarrier modulation signals multicarrier modulation H04L27/2601
• CPC Class Codes: H04L 5/06 : the signals being represented by different frequencies combined with time-division multiplexing H04L5/26
• CPC Class Codes: H04L 7/048 : using the properties of error detecting or error correcting codes, e.g. parity as synchronisation signal
• CPC Class Codes: H04Q 11/0478 : Provisions for broadband connections
• CPC Class Codes: H04W 72/00 : Local resource management
• CPC Class Codes: H04W 72/0453 : Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 84/06 : Airborne or Satellite Networks space-based or airborne stations H04B7/185

Abstract

An apparatus and method for providing bandwidth on demand service in a wireless communication system having at least one user station, including a frequency divider for dividing a selected bandwidth into a plurality of frequency subdivisions. Also included is a unit for assigning a first number of frequency subdivisions to the individual user stations having a first total bandwidth, commensurate with the volume of transmission traffic. There also is a unit for changing the first number to a second number having a second total bandwidth commensurate with the change of the volume of transmission traffic.

Claims

1. A method of providing bandwidth on demand service in a wireless communication system having at least one user station, comprising the steps of:

dividing a selected bandwidth into a plurality of frequency subdivisions;

assigning a first number of said frequency subdivisions to an individual user station in said wireless communication system, each of said user stations having a volume of transmission traffic, said first number of said frequency subdivisions having a first total bandwidth commensurate with said volume of transmission traffic of said individual user station; and

changing said first number of frequency subdivisions to a second number of frequency subdivisions as said volume of transmission traffic of said individual user station changes, said second number of frequency subdivisions having a second total bandwidth commensurate with said volume of transmission traffic of said individual user as said volume of transmission traffic changes.

2. The method of providing bandwidth on demand service in a wireless communication system according to claim 1, wherein said frequency subdivisions are of equal size.

3. The method of providing bandwidth on demand service in a wireless communication system according to claim 1, wherein said frequency subdivisions are of unequal size.

4. The method of providing bandwidth on demand service in a wireless communication system according to claim 1, wherein frequency subdivisions included in said first number of frequency subdivisions are adjacent in said selected bandwidth spectrum.

5. The method of providing bandwidth on demand service in a wireless communication system according to claim 1, wherein frequency subdivisions included in said second number of frequency subdivisions are adjacent in said selected bandwidth spectrum.

6. The method of providing bandwidth on demand service in a wireless communication system according to claim 4, wherein said frequency subdivisions included in said first number of frequency subdivisions are combined to operate on a first single center frequency.

7. The method of providing bandwidth on demand service in a wireless communication system according to claim 6, wherein frequency subdivisions included in said second number of frequency subdivisions assigned to said individual user station are adjacent and are combined to operate on a second single center frequency.

8. The method of providing bandwidth on demand service in a wireless communication system according to claim 7, wherein said second single center frequency is different from said first single center frequency.

9. The method of providing bandwidth on demand service in a wireless communication system according to claim 1, wherein at least one of said frequency subdivisions of said first number of frequency subdivisions has a center frequency different from other frequency subdivisions of said first number of frequency subdivisions.

10. The method of providing bandwidth on demand service in a wireless communication system according to claim 1, wherein at least one of said frequency subdivisions of said second number of frequency subdivisions has a center frequency different from other frequency subdivisions of said second number of frequency subdivisions.

11. The method of providing bandwidth on demand service in a wireless communication system according to claim 1, wherein said changing step comprises the steps of:

adding additional frequency subdivisions to said first number of frequency subdivisions to form said second number of frequency subdivisions as said volume of transmission traffic of said individual user station increases; and

deleting excess frequency subdivisions from said first number of frequency subdivisions to form said second number of frequency subdivisions as said volume of transmission traffic of said individual user station decreases.

12. The method of providing bandwidth on demand service in a wireless communication system according to claim 11, wherein said additional frequency subdivisions are adjacent to said first number of frequency subdivisions in said selected bandwidth spectrum.

13. The method of providing bandwidth on demand service in a wireless communication system according to claim 1, wherein said wireless communication system is an asynchronous transfer mode transmission system.

14. A method of providing bandwidth on demand service in a wireless communication system having at least one user station, comprising the steps of:

dividing a selected bandwidth spectrum into frequency subdivisions of various bandwidth sizes;

assigning a first frequency subdivision to an individual user station in said wireless communication system, each of said user stations having a volume of transmission traffic, said first frequency subdivision having a first bandwidth commensurate with said volume of transmission traffic of said individual user station; and

assigning a second frequency subdivision to said individual user station when said volume of transmission traffic of said individual user station changes so that a combined bandwidth of said first and said second frequency subdivision is commensurate with volume.

15. A method of providing bandwidth on demand service in a wireless communication system according to claim 14, wherein said second frequency subdivision replaces said first frequency subdivision when said volume of transmission traffic of said individual user station changes.

16. The method of providing bandwidth on demand service in a wireless communication system according to claim 14, wherein said wireless communication system is an asynchronous transfer mode transmission system.

17. A method of providing bandwidth on demand service in a wireless communication system having at least one user station, comprising the steps of:

dividing a selected bandwidth spectrum into frequency subdivisions of various bandwidth sizes; and

assigning a set of multiple frequency subdivisions to an individual user station so that in combination said multiple frequency subdivisions have a bandwidth commensurate with a volume of transmission traffic of said individual user station;

adding frequency subdivisions to said set of multiple frequency subdivisions so that said bandwidth remains commensurate with said volume of transmission traffic of said individual user station as said volume increases; and

deleting frequency subdivisions from said set of multiple frequency subdivisions so that said bandwidth remains commensurate with said volume of transmission traffic of said individual user station as said volume decreases.

18. A method of providing bandwidth on demand service in a wireless communication system according to claim 17, wherein at least two of said multiple frequency subdivisions are adjacent in said bandwidth spectrum and said at least two of said multiple frequency subdivisions are combined to operate on a single center frequency.

19. A method of providing bandwidth on demand service in a wireless communication system according to claim 17, wherein each frequency subdivision of said multiple frequency subdivisions assigned to said individual user station has a different center frequency.

20. A method of providing bandwidth on demand service in a wireless communication system according to claim 17, wherein one frequency subdivision of said multiple frequency subdivisions is deleted from said set of multiple frequency subdivisions and a second frequency subdivision is added to said set of multiple frequency subdivisions so that said bandwidth of said multiple frequency subdivisions assigned remains commensurate with said volume of transmission traffic of said individual user station as said volume of transmission traffic changes.

21. The method of providing bandwidth on demand service in a wireless communication system according to claim 17, wherein said wireless communication system is an asynchronous transfer mode transmission system.

22. A method of providing bandwidth on demand service in a wireless communication system having at least one user station, comprising the steps of:

dividing a selected bandwidth into frequency subdivisions of equal bandwidth size;

assigning a first number of said frequency subdivisions to an individual user station in said wireless communication system, each of said user stations having a volume of transmission traffic, said first number of said frequency subdivisions having a total bandwidth commensurate with said volume of transmission traffic of said individual user station; and

changing said first number of frequency subdivisions to a second number of said frequency subdivisions as said volume of transmission traffic of said individual user station changes, said second number of frequency subdivisions having a total bandwidth commensurate with said volume of transmission traffic of said individual user as said volume of transmission traffic changes.

23. The method of providing bandwidth on demand service in a wireless communication system according to claim 22, wherein frequency subdivisions included in said first number of frequency subdivisions are adjacent in said selected bandwidth spectrum.

24. The method of providing bandwidth on demand service in a wireless communication system according to claim 22, wherein frequency subdivisions included in said second number of frequency subdivisions are adjacent in said selected bandwidth spectrum.

25. The method of providing bandwidth on demand service in a wireless communication system according to claim 23, wherein adjacent frequency subdivisions included in said first number of frequency subdivisions are combined to operate on a first single center frequency.

26. The method of providing bandwidth on demand service in a wireless communication system according to claim 25, wherein frequency subdivisions included in said second number of frequency subdivisions assigned to said individual user station are adjacent and are combined to operate on a second single center frequency.

27. The method of providing bandwidth on demand service in a wireless communication system according to claim 26, wherein said second single center frequency is different from said first single center frequency.

28. The method of providing bandwidth on demand service in a wireless communication system according to claim 22, wherein said changing step further comprises the steps of:

adding additional frequency subdivisions to said first number of frequency subdivisions to form said second number of frequency subdivisions as said volume of transmission traffic of said individual user station increases, so that said total bandwidth of said second number of frequency subdivisions is commensurate with said volume of transmission traffic; and

deleting excess frequency subdivisions from said first number of frequency subdivisions to form said second number of frequency subdivisions as said volume of transmission traffic of said individual user station decreases, so that said total bandwidth of said second number of frequency subdivisions is commensurate with said volume of transmission traffic.

29. The method of providing bandwidth on demand service in a wireless communication system according to claim 28, wherein said additional frequency subdivisions are adjacent to said first number of frequency subdivisions in said selected bandwidth spectrum.

30. The method of providing bandwidth on demand service in a wireless communication system according to claim 22, wherein said wireless communication system is an asynchronous transfer mode transmission system.

31. The method of providing bandwidth on demand service in a wireless communication system according to claim 22, wherein said wireless communication system is a frame relay transmission system.

32. The method of providing bandwidth on demand service in a wireless communication system according to claim 22, wherein said wireless communication system is an ISDN protocol-compatible transmission system.

33. The method of providing bandwidth on demand service in a wireless communication system according to claim 22, wherein said wireless communication system is an Internet protocol-compatible transmission system.

34. Apparatus for providing bandwidth on demand service in a wireless communication system having at least one user station, comprising:

a frequency divider for dividing a selected bandwidth into a plurality of frequency subdivisions;

means for assigning a first number of said frequency subdivisions to an individual user station in said wireless communication system, each of said user stations having a volume of transmission traffic, said first number of said frequency subdivisions having a first total bandwidth commensurate with said volume of transmission traffic of said individual user station; and

means for changing said first number of frequency subdivisions to a second number of frequency subdivisions as said volume of transmission traffic of said individual user station changes, said second number of frequency subdivisions having a second total bandwidth commensurate with said volume of transmission traffic of said individual user as said volume of transmission traffic changes.

35. The apparatus for providing bandwidth on demand service in a wireless communication system according to claim 34, wherein said frequency subdivisions are of equal size.

36. The apparatus for providing bandwidth on demand service in a wireless communication system according to claim. 34, wherein said frequency subdivisions are of unequal size.

37. The apparatus for providing bandwidth on demand service in a wireless communication system according to claim 34, wherein frequency subdivisions included in said first number of frequency subdivisions are adjacent in said selected bandwidth spectrum.

38. The apparatus for providing bandwidth on demand service in a wireless communication system according to claim 34, wherein frequency subdivisions included in said second number of frequency subdivisions are adjacent in said selected bandwidth spectrum.

39. The apparatus for providing bandwidth on demand service in a wireless communication system according to claim 38, wherein said frequency subdivisions included in said first number of frequency subdivisions are combined to operate on a first single center frequency.

40. The apparatus for providing bandwidth on demand service in a wireless communication system according to claim 39, wherein frequency subdivisions included in said second number of frequency subdivisions assigned to said individual user station are adjacent and are combined to operate on a second single center frequency.

41. The apparatus for providing bandwidth on demand service in a wireless communication system according to claim 40, wherein said second single center frequency is different from said first single center frequency.

42. The apparatus for providing bandwidth on demand service in a wireless communication system according to claim 34, wherein at least one of said frequency subdivisions of said first number of frequency subdivisions has a center frequency different from other frequency subdivisions of said first number of frequency subdivisions.

43. The apparatus for providing bandwidth on demand service in a wireless communication system according to claim 34, wherein at least one of said frequency subdivisions of said second number of frequency subdivisions has a center frequency different from other frequency subdivisions of said second number of frequency subdivisions.

44. The apparatus for providing bandwidth on demand service in a wireless communication system according to claim 34, wherein said means for changing further comprises:

means for adding additional frequency subdivisions to said first number of frequency subdivisions to form said second number of frequency subdivisions as said volume of transmission traffic of said individual user station increases; and

means for deleting excess frequency subdivisions from said first number of frequency subdivisions to form said second number of frequency subdivisions as said volume of transmission traffic of said individual user station decreases.

45. The apparatus for providing bandwidth on demand service in a wireless communication system according to claim 44, wherein said additional frequency subdivisions are adjacent to said first number of frequency subdivisions in said selected bandwidth spectrum.

46. The apparatus for providing bandwidth on demand service in a wireless communication system according to claim 34, wherein said wireless communication system is an asynchronous transfer mode transmission system.

47. The apparatus for providing bandwidth on demand service in a wireless communication system according to claim 34, wherein said wireless communication system is a frame relay transmission system.

48. The apparatus for providing bandwidth on demand service in a wireless communication system according to claim 34, wherein said wireless communication system is an ISDN/SS#7 transmission system.

49. The apparatus for providing bandwidth on demand service in a wireless communication system according to claim 34, wherein said wireless communication system is an Internet transmission system.

50. An apparatus for providing bandwidth on demand service in a wireless communication system having at least one user station, comprising:

means for dividing a selected bandwidth spectrum into frequency subdivisions of various bandwidth sizes;

means for assigning a first frequency subdivision to an individual user station in said wireless communication system, each of said user stations having a volume of transmission traffic, said first frequency subdivision having a first bandwidth commensurate with said volume of transmission traffic of said individual user station; and

means for assigning a second frequency subdivision to said individual user station when said volume of transmission traffic of said individual user station changes so that a combined bandwidth of said first and said second frequency subdivision is commensurate with volume.

51. The apparatus for providing bandwidth on demand service in a wireless communication system according to claim 50, wherein said second frequency subdivision replaces said first frequency subdivision when said volume of transmission traffic of said individual user station changes.

52. The apparatus for providing bandwidth on demand service in a wireless communication system according to claim 50, wherein said wireless communication system is one of an asynchronous transfer mode transmission system, frame relay system, Internet system and ISDN/SS#7 system.

54. The apparatus for providing bandwidth on demand service in a wireless communication system according to claim 50, wherein at least two of said multiple frequency subdivisions are adjacent in said bandwidth spectrum and said at least two of said multiple frequency subdivisions are combined to operate on a single center frequency.

53. An apparatus for providing bandwidth on demand service in a wireless communication system having at least one user station, comprising:

means for dividing a selected bandwidth spectrum into frequency subdivisions of various bandwidth sizes; and

means for assigning a set of multiple frequency subdivisions to an individual user station so that in combination said multiple frequency subdivisions have a bandwidth commensurate with a volume of transmission traffic of said individual user station;

means for adding frequency subdivisions to said set of multiple frequency subdivisions so that said bandwidth remains commensurate with said volume of transmission traffic of said individual user station as said volume increases; and

means for deleting frequency subdivisions from said set of multiple frequency subdivisions so that said bandwidth remains commensurate with said volume of transmission traffic of said individual user station as said volume decreases.