Spread spectrum apparatus and method for network RF data communications having extended communication channels

• US 6,034,988 A
• Filed: 08/04/1997
• Issued: 03/07/2000
• Est. Priority Date: 08/04/1997
• Status: Expired due to Term

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Intellon Corporation (Qualcomm, Inc.)
• Inventors: Magin, Gregory, VanderMey, James E., Blanchard, Bart, Earnshaw, William, Patella, James
• Primary Examiner(s): Pham, Chi H.
• Assistant Examiner(s): Bayard, Emmanuel
• Application Number:
  US08/905,904
• Time in Patent Office: 946 Days
• Field of Search: 375/202, 375/295, 375/259, 375/316, 375/343, 375/219, 370/319, 370/343, 370/330, 370/340, 455/103, 455/454, 455/455, 455/450, 455/509
• US Class Current: 375/134
• CPC Class Codes: H04B 1/713 using frequency hopping
• CPC Class Codes: H04B 2001/6912 using chirp
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 74/0808 using carrier sensing, e.g. carrier sense multiple access [CSMA]

Abstract

An apparatus and methods are provided for network radio frequency ("RF") data communications. The apparatus preferably has an extended channel radio transmitter for selectively transmitting data communication radio signals across a plurality of different carrier frequencies which respectively define a plurality of extended data communication channels. The transmitter preferably includes a channel scanner for scanning the extended data communication channels for availability prior to transmitting across a selected one of the plurality of extended data communication channels. An extended channel radio receiver is responsive to the extended channel radio transmitter for receiving the data communication signals from the selected one of the extended data communication channels. The extended channel radio receiver preferably includes an extended channel data detection synchronizer responsive to the data communications signals being received by the receiver for synchronizing the transmitting and receiving of the data communication signals across the extended data communications channels. Any and all extended channel contending transmitters and receivers or transceivers within a network preferably sense and synchronize to the extended channel being transmitted within a predetermined period of time, i.e., within one bit time of Unit Symbol Time. This assures that normal carrier sense access control protocols operate correctly across the virtual channel which includes the plurality of possible extended channels.

Claims

1. An apparatus for network RF data communications, the apparatus comprising:

extended channel radio transmitting means for selectively transmitting data communication radio signals across a selected one of a plurality of different carrier frequencies which respectively define a plurality of extended data communication channels within a predetermined bandwidth, said extended channel radio transmitting means including channel scanning means for scanning the three extended data communication channels for availability prior to transmitting across the selected one of the plurality of extended data communication channels;

extended channel radio receiving means for receiving the data communication signals from the selected one of the plurality of extended data communication channels, said extended channel radio receiving means including extended channel data receipt synchronizing means responsive to data communications signals being received for synchronizing the receiving of data communications across the plurality of extended data communications channels with the data communications signals being transmitted across the selected channel, said extended channel data receipt synchronizing means including correlating means responsive to the data communication signals transmitted across each of the plurality of extended data communication channels for correlating data communication signals to a predetermined threshold value, radio frequency hopping means for hopping among the plurality of different carrier frequencies in a sequence and for locking onto an active one of the plurality of extended data communication channels to receive data communication signals therefrom, and carrier detecting means responsive to said correlating means for detecting the presence of data communication signals on each of the plurality of extended data communication channels to thereby provide stop signals and resume signals to said frequency hopping means so as to respectively stop and resume the hopping between each of the plurality of extended data communication channels; and

processing means responsive to said extended channel radio receiving means for processing the data communication signals for a network application.

2. An apparatus as defined in claim 1, wherein said extended channel data receipt synchronizing means includes carrier detecting means for detecting the presence of data communication signals on each of the plurality of extended data communication channels within a predetermined time, the predetermined time being less than the preamble time of a selected data communications protocol.

3. An apparatus as defined in claim 1, wherein the data communication signals comprise a plurality of data packets, wherein said extended channel transmitting means is configured for transmitting a plurality of data packets across the plurality of extended data communication channels, and wherein said correlating means of said data detection synchronizing means includes at least one correlator responsive to data packets being received for correlating at least portions of a received data packet to the predetermined threshold value and at least one sub-bit detector responsive to the at least one correlator for detecting at least one sub-bit of a data packet being received to thereby synchronize the receiving of the plurality of data packets across the plurality of data communications channels.

4. An apparatus as defined in claim 3, wherein said radio frequency hopping means of said extended channel radio receiving means comprises:

scanning means for sequentially and continuously scanning the plurality of extended data communication channels;

dwelling means responsive to said scanning means for dwelling on each of scanned plurality of extended data communication channels for a predetermined time; and

validating means responsive to said dwelling means and said carrier detecting means for validating detected data communication signals prior to receiving the data communication signals.

5. An apparatus as defined in claim 4, wherein said extended channel radio receiving means further comprises frequency locking means responsive to said carrier detecting means for locking the receipt of data communication signals onto a center frequency of the selected one of the plurality of extended data communication channels.

6. An apparatus as defined in claim 5, wherein said extended channel generating means of said extended channel transmitting means includes a waveform generating circuit responsive to said frequency locking means for generating waveforms at each of the plurality of different carrier frequencies and high speed tuning means responsive to said waveform generating circuit for rapidly tuning said waveform generating circuit.

7. An apparatus as defined in claim 1, wherein said extended channel transmitting means includes channel generating means for generating at least three different RF carrier frequencies which form lower, center, and upper RF carrier frequencies within the predetermined bandwidth and which define three extended data communications channels and channel selecting means for selecting one of the three extended data communications channels to transmit RF data communication signals having lower and upper sidebands onto the selected one of the three extended data communication channels.

8. An apparatus as defined in claim 7, wherein the lower and upper sidebands of the radio data communication signals for the lower, center, and upper frequencies of each of the three extended data communication channels are interleaved.

9. An apparatus as defined in claim 8, wherein the predetermined bandwidth is in the range of about 800 MHZ to about 1100 MHZ or in the range of about 2300 MHZ to 2600 MHZ, and wherein the lower, center, and upper frequency carriers have a difference in the carrier frequency between each other in the range of less than about 100 MHZ.

10. An apparatus as defined in claim 5, wherein said extended channel receiving means further comprises sideband selecting means responsive to said correlating means for selecting the upper sideband, the lower sideband, or both the upper and the lower sidebands of one of the plurality of extended data communication channel for receiving the data communication signals therefrom.

11. An apparatus as defined in claim 1, wherein said processing means includes application controller interfacing means for interfacing with a controller of at least one network application device, said application controller interfacing means having predetermined data communication signal transmitting and receiving protocols for transmitting data communication signals received from one of the plurality of extended data communication channels to the controller and for receiving data communication signals from the controller.

12. An apparatus for network data communications, the apparatus comprising:

an extended channel radio transmitter for selectively transmitting data communication radio signals across a selected one of a plurality of different carrier frequencies which respectively define a plurality of extended data communication channels within a predetermined bandwidth, the data communication signals comprising at least one of a plurality of data packets, said extended channel radio transmitter including channel scanning means for scanning the three extended data communication channels for availability prior to transmitting a data packet across the selected one of the plurality of extended data communication channels; and

an extended channel radio receiver responsive to said extended channel radio transmitter means for receiving the plurality of data packets from the selected one of the plurality of extended data communication channels, said extended channel radio receiver including extended channel data receipt synchronizing means responsive to data communications signals being received for synchronizing the receiving of the plurality of data packets across the plurality of extended data communications channels with the plurality of data packets being transmitted across the selected channel, said extended channel data receipt synchronizing means including at least one correlator responsive to data packets being received for correlating at least portions of a received data packet to a predetermined threshold value and at least one sub-bit detector responsive to the at least one correlator for detecting at least one sub-bit of a data packet being received to thereby synchronize the receiving of the plurality of data packets across the plurality of data communications channels.

13. An apparatus as defined in claim 12, wherein said extended channel data receipt synchronizing means further includes carrier detecting means for detecting the presence of data communication signals on each of the plurality of extended data communication channels within a predetermined time, the predetermined time being less than the preamble time of a selected data communications protocol.

14. An apparatus as defined in claim 12, wherein said extended channel data receipt synchronizing means further includes:

radio frequency hopping means for hopping among the plurality of different carrier frequencies in a sequence and for locking onto an active one of the plurality of extended data communication channels to receive data communication signals therefrom; and

carrier detecting means responsive to said correlator for detecting the presence of data communication signals on each of the plurality of extended data communication channels to thereby provide stop signals and resume signals to said frequency hopping means so as to respectively stop and resume the hopping between each of the plurality of extended data communication channels.

15. An apparatus as defined in claim 14, wherein said radio frequency hopper of said extended channel radio receiver comprises:

a frequency scanner for sequentially and continuously scanning the three extended data communication channels;

a dweller responsive to said frequency scanner for dwelling on each of the scanned extended data communication channels for a predetermined time; and

a validator responsive to said dweller and said carrier detector for validating detected data communication signals prior to receiving the data communication signals.

16. An apparatus as defined in claim 15, wherein said extended channel radio receiver further comprises frequency locking means responsive to said carrier detector for locking the receipt of data communication signals onto a center frequency of the selected one of the three extended data communication channels.

17. An apparatus as defined in claim 16, wherein said extended channel radio receiver further comprises a sideband selector responsive to said correlator for selecting the upper sideband, the lower sideband, or both the upper and the lower sidebands of one of the three extended data communication channels for receiving the data communication signals therefrom.

18. An apparatus as defined in claim 18, wherein said extended channel radio transmitter comprises means for selectively transmitting radio data communication signals having lower and upper sidebands onto one of three extended data communication channels within the predetermined bandwidth, the three different carrier frequencies of the three extended data communication channels defining lower, center, and upper carrier frequencies.

19. An apparatus as defined in claim 18, wherein the lower and upper sidebands of the radio data communication signals for the lower, center, and upper frequencies of each of the three extended data communication channels are interleaved.

20. An apparatus as defined in claim 19, wherein the predetermined bandwidth is in the range of about 900 MHZ to about 1000 MHZ or in the range of about 2400 MHZ to 2500 MHZ, and wherein the lower, center, and upper frequency carriers have a difference in the carrier frequency between each other in the range of less than about 50 MHz.

21. An apparatus as defined in claim 20, wherein said extended channel radio transmitter includes a waveform generating circuit responsive to said frequency locking means for generating waveforms at each of the plurality of different carrier frequencies and a high speed tuning circuit responsive to said waveform generating circuit for rapidly tuning said waveform generating circuit.

22. An apparatus for RF network data communications, the apparatus comprising:

extended channel radio receiving means for receiving data communication signals from a plurality of different carrier frequencies which respectively define a plurality of extended data communication channels within a predetermined bandwidth, said extended channel radio receiving means including extended channel data receipt synchronizing means responsive to data communications signals being received for synchronizing receiving of data communications across the plurality of extended data communications channels with the data communications signals being transmitted across the selected channel, said extended channel data receipt synchronizing means including correlating means responsive to the data communication signals transmitted across each of the plurality of extended data communication channels for correlating data communication signals to a predetermined threshold value, radio frequency hopping means for hopping among the plurality of different carrier frequencies in a sequence and for locking onto an active one of the plurality of extended data communication channels to receive data communication signals therefrom, and carrier detecting means responsive to said correlating means for detecting the presence of data communication signals on each of the plurality of extended data communication channels within a predetermined time period to thereby provide stop signals and resume signals to said frequency hopping means so as to respectively stop and resume the hopping between each of the plurality of extended data communication channels, the predetermined time being less than the preamble time of a selected data communications protocol; and

signal processing means responsive to said extended channel radio receiving means for processing the data communication signals for a network application.

23. An apparatus as defined in claim 22, wherein the data communication signals comprise a plurality of data packets, wherein said extended channel transmitting means is configured for transmitting a plurality of data packets across the plurality of extended data communication channels, and wherein said correlating means of said data detection synchronizing means includes at least one correlator responsive to data packets being received for correlating at least portions of a received data packet to the predetermined threshold value and at least one sub-bit detector responsive to the at least one correlator for detecting at least one sub-bit of a data packet being received to thereby synchronize the receiving of the plurality of data packets across the plurality of data communications channels.

24. An apparatus as defined in claim 22, wherein the radio data communication signals received by said extended channel radio receiving means each have lower and upper sidebands, and wherein the different carrier frequencies of the plurality of extended data communication channels define at least lower, center, and upper carrier frequencies.

25. An apparatus as defined in claim 24, wherein the lower and upper sidebands of the radio data communication signals for the at least lower, center, and upper frequencies of each of the plurality of extended data communication channels are interleaved.

26. An apparatus as defined in claim 25, wherein the predetermined bandwidth of the plurality of extended data communication channels is in the range of about 800 MHZ to about 1100 MHZ or in the range of about 2300 MHZ to 2600 MHZ, and wherein the lower, center, and upper frequency carriers have a difference in the carrier frequency between each other in the range of less than about 100 MHZ.

27. An apparatus as defined in claim 26, wherein said radio frequency hopping means of said extended channel radio receiving means comprises:

scanning means for sequentially and continuously scanning the plurality of extended data communication channels;

dwelling means responsive to said scanning means for dwelling on each of scanned plurality of extended data communication channels for a predetermined time; and

validating means responsive to said dwelling means and said carrier detecting means for validating detected data communication signals prior to receiving the data communication signals.

28. An apparatus as defined in claim 27, wherein said extended channel radio receiving means further comprises frequency locking means responsive to said carrier detecting means for locking the receipt of data communication signals onto a center frequency of the selected one of the plurality of extended data communication channels.

29. An apparatus as defined in claim 28, wherein said extended channel receiving means further comprises sideband selecting means responsive to said correlating means for selecting the upper sideband, the lower sideband, or both the upper and the lower sidebands of one of the plurality of extended data communication channels for receiving the data communication signals therefrom.

30. An apparatus as defined in claim 29, wherein said sign al processing means includes application controller interfacing means for interfacing with a controller of at least network application device, said application controller interfacing means having predetermined data communication signal transmitting and receiving protocols for transmitting data communication signals received from one of the plurality of extended data communication channels to the controller and for receiving data communication signals from the controller.

31. A method of network data communications, the method comprising:

generating a plurality of different carrier frequencies which respectively define a plurality of extended data communication radio channels within a predetermined bandwidth;

selectively transmitting data communication signals on a selected one of the plurality of extended data communication channels;

receiving data communication signals from the selected one of the plurality of extended data communication channels, the receiving data communication signals from the selected one of the plurality of extended data communication channels including frequency hopping among each of the plurality of extended data communication channels, correlating received data communication signals to a predetermined threshold value, and detecting the presence of data communication signals on each of the plurality of extended data communication channels to thereby either stop or resume the frequency hopping among each of the plurality of extended data communication channels; and

processing received data communication signals to use in a network application.

32. A method as defined in claim 31, further comprising scanning the plurality of extended data communication channels for availability prior to transmitting the data communication radio signals.

33. A method as defined in claim 32, further comprising synchronizing the transmitting and receiving of data communications across the plurality of extended data communications channels within a predetermined period of time, the predetermined period of time being less than one bit of Unit Symbol Time for a selected data communications protocol.

34. A method as defined in claim 31, wherein the frequency hopping step comprises:

sequentially and continuously scanning the plurality of extended data communication channels;

dwelling on each of the scanned plurality of extended data communication channels for a predetermined time; and

validating detected data communication signals prior to receiving the data communication signals.

35. A method as defined in claim 34, further comprising locking the receipt of data communication signals onto a center frequency of the selected one of the plurality of extended data communication channels.

36. A method as defined in claim 35, further comprising selecting an upper sideband, a lower sideband, or both an upper and a lower sidebands of one of the plurality of extended data communication channels to receive the data communication signals therefrom.

37. A method as defined in claim 31, further comprising:

interfacing with a controller of at least one network application device;

transmitting data communication signals received from one of the plurality of extended data communication channels to the controller; and

receiving data communication signals from the controller.

38. A method of network data communications, the method comprising:

scanning a plurality of different carrier frequencies which respectively define a plurality of extended data communication channels within a predetermined bandwidth for availability prior to transmitting data communication radio signals;

transmitting data communication radio signals across the plurality of extended data communication channels;

sequentially hopping among the plurality of extended data communication channels;

locking onto an active one of the plurality of extended data communication channels;

receiving the data communication signals from the selected active one of the plurality of extended data communication channels, the receiving the data communication signals including correlating received data communication signals to a predetermined threshold value and detecting the presence of data communication signals on each of the plurality of extended data communication channels to thereby either stop or resume hopping among each of the plurality of extended data communication channels;

synchronizing the transmitting and receiving of data communications across the plurality of extended data communications channels within a predetermined period of time, the predetermined time being less than the preamble time of a selected data communications protocol; and

processing received data communication signals to use in a network application.

39. A method as defined in claim 38, wherein the sequential hopping step comprises:

sequentially and continuously scanning the plurality of extended data communication channels;

dwelling on each of the scanned plurality of extended data communication channels for a predetermined time; and

validating detected data communication signals prior to receiving the data communication signals.

40. A method as defined in claim 39, further comprising locking the receipt of data communication signals onto a center frequency of the selected one of the plurality of extended data communication channels.

41. A method as defined in claim 40, further comprising selecting an upper sideband, a lower sideband, or both an upper and a lower sidebands of one of the plurality of extended data communication channels to receive the data communication signals therefrom.

42. A method as defined in claim 41, further comprising:

interfacing with a controller of at least one network application device;

transmitting data communication signals received from one of the plurality of extended data communication channels to the controller; and

receiving data communication signals from the controller.

43. A method of home automation data communications, the method comprising:

generating a plurality of different carrier frequencies which respectively define a plurality of extended data communication radio channels within a predetermined bandwidth;

scanning the plurality of extended data communication channel for availability prior to transmitting the data communication radio signals;

selectively transmitting data communication signals on a selected one of the plurality of extended data communication channels;

receiving data communication signals from the selected one of the plurality of extended data communication channels, the receiving of data communication signals from the selected one of the plurality of extended data communication channels including frequency hopping among each of the plurality of extended data communication channels, correlating received data communication signals to a predetermined threshold value, and detecting the presence of data communication signals on each of the plurality of extended data communication channels to thereby either stop or resume the frequency hopping among each of the plurality of extended data communication channels;

synchronizing the transmitting and receiving of data communications across the plurality of extended data communications channels, the synchronizing of the transmitting and receiving of data communications occurring within a predetermined period of time, the predetermined period of time being less than the preamble time for a selected data communications protocol; and

processing received data communication signals to use in at least one home operated application.

44. A method as defined in claim 43, further comprising locking the receipt of data communication signals onto a center frequency of the selected one of the plurality of extended data communication channels.

45. A method as defined in claim 44, further comprising selecting an upper sideband, a lower sideband, or both an upper and a lower sidebands of one of the plurality of extended data communication channels to receive the data communication signals therefrom.

46. A method as defined in claim 45, further comprising:

interfacing with a controller of at least one home automation application device;

transmitting data communication signals received from one of the plurality of extended data communication channels to the controller; and

receiving data communication signals from the controller.

47. A method of network data communications, the method comprising:

generating a plurality of different carrier frequencies which respectively define a plurality of extended data communication radio channels within a predetermined bandwidth;

scanning the plurality of extended data communication channels for availability within a predetermined period of time, the predetermined period of time being less than two subbits of Unit Symbol Time for a selected data communications protocol;

transmitting data communication signals on a selected available channel;

receiving data communication signals from the selected available channel of the plurality of extended data communication channels, the receiving of data communication signals from the selected available channel of the plurality of extended data communication channels including frequency hopping among each of the plurality of extended data communication channels, correlating received data communication signals to a predetermined threshold value, and detecting the presence of data communication signals on each of the plurality of extended data communication channels to thereby either stop or resume the frequency hopping among each of the plurality of extended data communication channels.

48. A method as defined in claim 47, wherein the predetermined period of time comprises a first predetermined period of time, and the method further comprising synchronizing the transmitting and receiving of data communications across the plurality of extended data communications channels within a second predetermined period of time, the second predetermined period of time being less than the preamble time for a selected data communications protocol.

49. A method as defined in claim 47, wherein the frequency hopping step comprises:

sequentially and continuously scanning the plurality of extended data communication channels;

dwelling on each of the scanned plurality of extended data communication channels for a predetermined time; and

validating detected data communication signals prior to receiving the data communication signals.

50. A method as defined in claim 47, further comprising locking the receipt of data communication signals onto a center frequency of the selected available channel of the plurality of extended data communication channels.

51. A method as defined in claim 47, further comprising selecting an upper sideband, a lower sideband, or both an upper and a lower sidebands of one of the plurality of extended data communication channels to receive the data communication signals therefrom.

52. A method as defined in claim 47, further comprising:

interfacing with a controller of at least one network application device;

transmitting data communication signals received from the selected available channel of the plurality of extended data communication channels to the controller; and

receiving data communication signals from the controller.

53. An apparatus for network RF data communications, the apparatus comprising:

extended channel radio transmitting means for selectively transmitting data communication radio signals across a selected one of a plurality of different carrier frequencies which respectively define a plurality of extended data communication channels within a predetermined bandwidth, said extended channel radio transmitting means including channel generating means for generating at least three different RF carrier frequencies which form lower, center, and upper RF carrier frequencies within the predetermined bandwidth and which define three extended data communications channels, channel scanning means for scanning the three extended data communication channels for availability prior to transmitting across the selected one of the plurality of extended data communication channels, and channel selecting means for selecting one of the three extended data communications channels to transmit RF data communication signals having lower and upper sidebands onto the selected one of the three extended data communication channels;

extended channel radio receiving means for receiving the data communication signals from the selected one of the plurality of extended data communication channels, said extended channel radio receiving means including extended channel data receipt synchronizing means responsive to data communications signals being received for synchronizing the receiving of data communication s across the plurality of extended data communications channels with the data communications signals being transmitted across the selected channel; and

processing means responsive to said extended channel radio receiving means for processing the data communication signals for a network application.

54. An apparatus for RF network data communications, the apparatus comprising:

extended channel radio receiving means for receiving data communication signals from a plurality of different carrier frequencies which respectively define a plurality of extended data communication channels within a predetermined bandwidth, the radio data communication signals received by said extended channel radio receiving means each having lower and upper sidebands, and the different carrier frequencies of the plurality of extended data communication channels defining at least lower, center, and upper carrier frequencies, the lower and upper sidebands of the radio data communication signals for the at least lower, center, and upper frequencies of each of the plurality of extended data communication channels being interleaved, the predetermined bandwidth of the plurality of extended data communication channels being in the range of about 800 MHZ to about 1100 MHZ or in the range of about 2300 MHZ to 2600 MHZ, and the lower, center, and upper frequency carriers having a difference in the carrier frequency between each other in the range of less than about 100 MHZ, said extended channel radio receiving means including extended channel data receipt synchronizing means responsive to data communications signals being received for synchronizing the receiving of data communications across the plurality of extended data communications channels with the data communications signals being transmitted across the selected channel, said extended channel data receipt synchronizing means including radio frequency hopping means for hopping among the plurality of different carrier frequencies in a sequence and for locking onto an active one of the plurality of extended data communications channels to receive data therefrom, said radio frequency hopping means including scanning means for sequentially and continuously scanning the plurality of extended data communication channels, dwelling means responsive to said scanning means for dwelling on each of scanned plurality of extended data communication channels for a predetermined time, and validating means responsive to said dwelling means and said carrier detecting means for validating detected data communication signals prior to receiving the data communication signals; and

signal processing means responsive to said extended channel radio receiving means for processing the data communication signals for a network application.