Spread spectrum wireless over non-contiguous channels

• US 9,397,723 B2
• Filed: 08/26/2014
• Issued: 07/19/2016
• Est. Priority Date: 08/26/2014
• Status: Active Grant

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Inventors: Hassan, Amer A., Mitchell, Paul William Alexander, Garnett, Paul W.
• Primary Examiner(s): HA, DAC V
• Application Number:
  US14/468,699
• Publication Number:
  US 20160065265A1
• Time in Patent Office: 693 Days
• US Class Current: 1/1
• CPC Class Codes: H04B 1/69 Spread spectrum techniques
• CPC Class Codes: H04B 1/707 using direct sequence modulation
• CPC Class Codes: H04J 13/00 Code division multiplex systems for frequency hopping H04B1/713
• CPC Class Codes: H04J 13/0003 Code application, i.e. aspects relating to how codes are applied to form multiplexed channels
• CPC Class Codes: H04L 27/0006 Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio for spectrum sharing between different networks H04W16/14
• CPC Class Codes: H04L 5/0016 Time-frequency-code
• CPC Class Codes: H04W 52/38 TPC being performed in particular situations
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

Techniques for spread spectrum wireless over non-contiguous channels are described. In at least some embodiments, a set of channels is selected for wireless communication, with at least some of the channels being non-contiguous (e.g., non-adjacent) from one another. A spreading sequence is selected, such as based on attributes of a selected set of channels. Communication data that is to be transmitted over the set of channels is combined with the spreading sequence to generate a spread spectrum signal. The spread spectrum signal is then divided into multiple sub-signals for transmission over the set of channels.

Claims

1. A system comprising:

one or more processors; and

one or more computer-readable storage media storing computer-executable instructions that are executable by the one or more processors to perform operations including;

receiving identifiers for a set of wireless channels that are available for wireless communication and a spreading sequence for the set of wireless channels, the wireless channels including one or more non-contiguous channels;

applying the spreading sequence to communication data to generate a spread spectrum signal;

dividing the spread spectrum signal into sub-signals based on a number of channels in the set of wireless channels; and

causing individual of the sub-signals to be transmitted over respective channels of the set of wireless channels.

2. A system as described in claim 1, wherein said receiving is responsive to a query for wireless channels for wireless communication.

3. A system as described in claim 1, wherein said receiving further comprises receiving a permitted transmission power for one or more of the wireless channels, and wherein said causing comprises causing a particular sub-signal of the multiple sub-signals to be transmitted based on the permitted transmission power.

4. A system as described in claim 1, wherein said applying comprises modulating the communication data utilizing the spreading sequence to generate the spread spectrum signal.

5. A system as described in claim 1, wherein said applying comprises representing the set of wireless channels as a single wireless channel with a bandwidth of the combined set of wireless channels.

6. A system as described in claim 1, wherein said dividing comprises inverse multiplexing the spread spectrum signal to generate the sub-signals.

7. A system as described in claim 1, wherein dividing comprises dividing the spread spectrum signal into a number of sub-signals that corresponds to the number of channels in the set of wireless channels.

8. A system as described in claim 1, wherein the operations further include:

receiving an updated set of wireless channels and an updated spreading sequence, the updated set of wireless channels including one or more non-contiguous channels; and

replacing the set of wireless channels and the spreading sequence with the updated set of wireless channels and the updated spreading sequence for use in transmitting further communication data.

9. A computer-implemented method comprising:

selecting a set of wireless channels from a database of wireless channels that are available for wireless communication, the set of wireless channels including one or more non-contiguous channels;

identifying a spreading sequence based on one or more attributes of the set of wireless channels;

communicating the set of wireless channels and the spreading sequence for a receipt by a client device to be used for wireless communication;

receiving a request for an updated set of one or more wireless channels;

selecting an updated set of one or more wireless channels from the database of wireless channels;

identifying a different spreading sequence based on one or more attributes of the updated set of one or more wireless channels; and

communicating the updated set of one or more wireless channels and the different spreading sequence to be used by the client device for wireless communication.

10. The computer-implemented method as described in claim 9, wherein the set of wireless channels includes one or more white spaces.

11. The computer-implemented method as described in claim 9, wherein said identifying comprises identifying the spreading sequence based on a combined bandwidth of the set of wireless channels.

12. The computer-implemented method as described in claim 9, wherein said identifying comprises selecting the spreading sequence from a database of spreading sequences.

13. The computer-implemented method as described in claim 9, wherein the updated set of one or more wireless channels is selected based on a change in one or more of channel availability or channel attributes in the database of wireless channels.

14. The computer-implemented method as described in claim 9, further comprising:

receiving sub-signals over the set of wireless channels;

combining the sub-signals into a combined signal; and

demodulating the combined signal with the spreading sequence to obtain a stream of communication data.

15. The computer-implemented method as described in claim 9, wherein the request for an updated set of one or more wireless channels includes a request for one or more of:

at least one additional channel in addition to the set of wireless channels;

or

at least one channel that has a higher bandwidth than one or more channels of the set of wireless channels.

16. A computer-implemented method comprising:

selecting a set of wireless channels that include one or more non-contiguous channels;

identifying a spreading sequence based on a combined bandwidth of the set of wireless channels;

communicating the set of wireless channels and the spreading sequence to a client device to be used for wireless communication;

selecting an updated set of wireless channels based on an indication of a change in one or more of channel availability or channel attributes of one or more channels in the set of wireless channels;

identifying a different spreading sequence based on one or more attributes of the updated set of wireless channels; and

communicating the updated set of wireless channels and the different spreading sequence to be used to replace the set of wireless channels and the spreading sequence.

17. The computer-implemented method as described in claim 16, further comprising:

ascertaining a transmission power for one or more channels of the updated set of wireless channels; and

communicating the transmission power to be applied for transmission of wireless communication over the one or more channels of the updated set of wireless channels.

18. The computer-implemented method as described in claim 16, further comprising:

receiving sub-signals over the updated set of wireless channels;

combining the sub-signals into a combined signal; and

demodulating the combined signal with the spreading sequence to obtain a stream of communication data.

19. The computer-implemented method as described in claim 16, wherein the indication of the change in one or more of channel availability or channel attributes indicates that the one or more channels of the set of wireless channels has an insufficient signal quality.

20. The computer-implemented method as described in claim 16, wherein said selecting the updated set of wireless channels is further based on a request from the client device for an updated set of wireless channels.