Cloud service for optimizing white-space networks coexistence

• US 9,313,664 B2
• Filed: 07/21/2011
• Issued: 04/12/2016
• Est. Priority Date: 07/21/2011
• Status: Active Grant

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Inventors: Moscibroda, Thomas, Chandra, Ranveer, Bahl, Paramvir, Rahul, Hariharan
• Primary Examiner(s): Huang, Wen
• Application Number:
  US13/188,395
• Publication Number:
  US 20130023216A1
• Time in Patent Office: 1,727 Days
• Field of Search: 455/454, 455/41.1, 455/41.2, 455/41.3, 455/447, 455/448
• US Class Current: 1/1
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

The coexistence of a plurality of different wireless networks that concurrently operate in a common geographic region is optimized. A query is received from a wireless node requesting advice on specific portions of a radio frequency spectrum to use. A spectrum recommendation procedure is then run to generate advice on recommended portions of the radio frequency spectrum for the wireless node to use in order to minimize one or more of interference in the spectrum, or noise in the spectrum, or contention in the spectrum. A recommendation reply is then sent to the wireless node which includes information specifying the recommended portions of the radio frequency spectrum for the wireless node to use in order to minimize one or more of interference in the spectrum, or noise in the spectrum, or contention in the spectrum.

Claims

1. A computer-implemented process for optimizing the coexistence of a plurality of different wireless networks that concurrently operate in a common geographic region, comprising:

using a computer to perform the following process actions;

receiving a query from a wireless node requesting advice on specific portions of a radio frequency spectrum to use, wherein said wireless node is a wireless computing device operating in one of said wireless networks comprising a plurality of wireless nodes;

receiving explicit information that the wireless node locally observes about current radio frequency spectrum usage, said information comprising specifying portions of the radio frequency spectrum that are not currently being used by any licensed incumbent users in the current geographic location of the wireless node;

running a spectrum recommendation procedure to generate advice on recommended portions of the radio frequency spectrum for the wireless node to use in order to minimize one or more of interference in the spectrum, or noise in the spectrum, or contention in the spectrum using at least the received explicit information that the wireless node locally observed about current radio frequency spectrum usage; and

sending a recommendation reply to the wireless node comprising information specifying the recommended portions of the radio frequency spectrum for the wireless node to use in order to minimize one or more of interference in the spectrum, or noise in the spectrum, or contention in the spectrum.

2. The process of claim 1, wherein the different wireless networks comprise white-space networks, the wireless node comprises a white-space node, the radio frequency spectrum comprises a white-space spectrum, and the query comprises an identifier that uniquely identifies the white-space node and information specifying a current geographic location of the white-space node.

3. The process of claim 2, wherein the process action of receiving explicit information that the wireless node locally observes about current radio frequency spectrum usage further comprises receiving explicit information that the white-space node locally observes about current white-space spectrum usage, said explicit information comprising one or more of,

information specifying current network activities of the white-space node in a particular portion of the white-space spectrum, or

information specifying network types of other white-space nodes that are using the white-space spectrum, or

information specifying a current interference level the white-space node measures in one or more particular portions of the white-space spectrum, or

information specifying a current contention level the white-space node measures in one or more particular portions of the white-space spectrum, or

information specifying current network traffic characteristics the white-space node observes in one or more particular portions of the white-space spectrum, or

information specifying a current noise level the white-space node measures in one or more particular portions of the white-space spectrum;

and

storing said explicit information in a database.

4. The process of claim 2, wherein the query further comprises one or more of:

information specifying a type of white-space network the white-space node wants to use;

or

information specifying an expected network load of the white-space node;

or

information specifying network response-time needs of the white-space node;

or

a network identifier which identifies a specific wireless network that the white-space node wants to connect to;

or

information specifying wireless networking capabilities of the white-space node, said capabilities comprising one or more of whether or not the white-space node is capable of bonding a plurality of channels together, or whether or not the white-space node is capable of performing subcarrier suppression;

or

information specifying portions of the white-space spectrum that are not currently being used by any licensed incumbent users in the current geographic location of the white-space node.

5. The process of claim 2, wherein the white-space node comprises a white-space base station and the query further comprises information specifying the number of client devices that are attached to the base station and a current geographic location of each of said client devices.

6. The process of claim 2, wherein,

the process action of running a spectrum recommendation procedure to generate advice on recommended portions of the radio frequency spectrum for the wireless node to use in order to minimize one or more of interference in the spectrum, or noise in the spectrum, or contention in the spectrum comprises an action of determining available portions of the white-space spectrum, said available portions comprising portions of the white-space spectrum that are not currently being used by any licensed incumbent users in a geographic region comprising the current geographic location of the white-space node, and

whenever the query comprises information specifying that the white-space node wants to use a long-range network, and there is a plurality of available portions of the white-space spectrum, and one or more of the plurality of available portions are not currently being used by any other white-space nodes, the recommendation reply comprises a list of the available portions of the white-space spectrum that are not currently being used by any other white-space nodes.

7. The process of claim 2, wherein,

the process action of running a spectrum recommendation procedure to generate advice on recommended portions of the radio frequency spectrum for the wireless node to use in order to minimize one or more of interference in the spectrum, or noise in the spectrum, or contention in the spectrum comprises an action of determining available portions of the white-space spectrum, said available portions comprising portions of the white-space spectrum that are not currently being used by any licensed incumbent users in a geographic region comprising the current geographic location of the white-space node, and

whenever the query comprises information specifying that the white-space node wants to use a long-range network, and there is a plurality of available portions of the white-space spectrum, and all of the plurality of available portions are currently being used by other white-space nodes, the recommendation reply comprises a list of the available portions of the white-space spectrum whose current contention level is below a prescribed threshold and whose current interference level is below another prescribed threshold.

8. The process of claim 2, wherein,

the process action of running a spectrum recommendation procedure to generate advice on recommended portions of the radio frequency spectrum for the wireless node to use in order to minimize one or more of interference in the spectrum, or noise in the spectrum, or contention in the spectrum comprises an action of determining available portions of the white-space spectrum, said available portions comprising portions of the white-space spectrum that are not currently being used by any licensed incumbent users in a geographic region comprising the current geographic location of the white-space node, and

whenever the query comprises information specifying that the white-space node wants to use a short-range network, the recommendation reply comprises one of a prescribed number of the available portions of the white-space spectrum which are reserved for use by white-space nodes wanting to use a short-range network.

9. The process of claim 2, wherein,

the process action of running a spectrum recommendation procedure to generate advice on recommended portions of the radio frequency spectrum for the wireless node to use in order to minimize one or more of interference in the spectrum, or noise in the spectrum, or contention in the spectrum comprises an action of determining available portions of the white-space spectrum, said available portions comprising portions of the white-space spectrum that are not currently being used by any licensed incumbent users in a geographic region comprising the current geographic location of the white-space node, and

whenever the query comprises information specifying that the white-space node wants to use a long-range network, and there are one or more available portions of the white-space spectrum which are not reserved for use by white-space nodes wanting to use a short-range network, and one or more of said available portions are not currently being used by any other white-space nodes, the recommendation reply comprises a list of the available portions of the white-space spectrum which are not reserved for use by white-space nodes wanting to use a short-range network and are not currently being used by any other white-space nodes.

10. The process of claim 2, wherein,

the process action of running a spectrum recommendation procedure to generate advice on recommended portions of the radio frequency spectrum for the wireless node to use in order to minimize one or more of interference in the spectrum, or noise in the spectrum, or contention in the spectrum comprises an action of determining available portions of the white-space spectrum, said available portions comprising portions of the white-space spectrum that are not currently being used by any licensed incumbent users in a geographic region comprising the current geographic location of the white-space node, and

whenever the query comprises information specifying that the white-space node wants to use a long-range network, and there is a plurality of available portions of the white-space spectrum, and all of the plurality of available portions are currently being used by other white-space nodes, the recommendation reply comprises a list of the available portions of the white-space spectrum which are not reserved for use by white-space nodes wanting to use a short-range network, and whose current contention level is below a prescribed threshold, and whose current interference level is below another prescribed threshold.

11. The process of claim 2, wherein,

the process action of running a spectrum recommendation procedure to generate advice on recommended portions of the radio frequency spectrum for the wireless node to use in order to minimize one or more of interference in the spectrum, or noise in the spectrum, or contention in the spectrum comprises an action of determining available portions of the white-space spectrum, said available portions comprising portions of the white-space spectrum that are not currently being used by any licensed incumbent users in a geographic region comprising the current geographic location of the white-space node, and

whenever the query comprises information specifying that the white-space node wants to use a long-range network and said node also wants to operate in a particular one of the available portions of the white-space spectrum in which one or more short-range networks and one or more other long-range networks currently operate, the recommendation reply comprises information specifying a periodic quiet interval which is synchronized with the one or more other long-range networks, wherein said node and the one or more other long-range networks will not transmit during the periodic quiet interval.

12. The process of claim 2, wherein,

the process action of running a spectrum recommendation procedure to generate advice on recommended portions of the radio frequency spectrum for the wireless node to use in order to minimize one or more of interference in the spectrum, or noise in the spectrum, or contention in the spectrum comprises an action of determining available portions of the white-space spectrum, said available portions comprising portions of the white-space spectrum that are not currently being used by any licensed incumbent users in a geographic region comprising the current geographic location of the white-space node, and

whenever the query comprises information specifying that the white-space node wants to use a wide-band network, and said node is capable of performing subcarrier suppression, and said node wants to operate in a particular one of the available portions of the white-space spectrum in which one or more narrow-band networks currently operate, the recommendation reply comprises information specifying that said node is to use subcarrier suppression to suppress one or more prescribed subcarriers in which the one or more narrow-band networks currently operate.

13. The process of claim 2, wherein,

the process action of running a spectrum recommendation procedure to generate advice on recommended portions of the radio frequency spectrum for the wireless node to use in order to minimize one or more of interference in the spectrum, or noise in the spectrum, or contention in the spectrum comprises an action of determining available portions of the white-space spectrum, said available portions comprising portions of the white-space spectrum that are not currently being used by any licensed incumbent users in a geographic region comprising the current geographic location of the white-space node, and

whenever the query comprises information specifying that the white-space node wants to use a narrow-band network, the recommendation reply comprises information specifying one of a prescribed number of the available portions of the white-space spectrum which are reserved for use by white-space nodes wanting to use a narrow-band network.

14. The process of claim 2, wherein,

the process action of running a spectrum recommendation procedure to generate advice on recommended portions of the radio frequency spectrum for the wireless node to use in order to minimize one or more of interference in the spectrum, or noise in the spectrum, or contention in the spectrum comprises an action of determining available portions of the white-space spectrum, said available portions comprising portions of the white-space spectrum that are not currently being used by any licensed incumbent users in a geographic region comprising the current geographic location of the white-space node, and

whenever the query comprises information specifying that the white-space node wants to use a wide-band network but said node is not capable of performing subcarrier suppression, and there are one or more available portions of the white-space spectrum which are not reserved for use by white-space nodes wanting to use a narrow-band network, and one or more of said available, portions are not currently being used by any other white-space nodes, the recommendation reply comprises information specifying a list of the available portions of the white-space spectrum which are not reserved for use by white-space nodes wanting to use a narrow-band network and are not currently being used by any other white-space nodes.

15. The process of claim 2, wherein,

the process action of running a spectrum recommendation procedure to generate advice on recommended portions of the radio frequency spectrum for the wireless node to use in order to minimize one or more of interference in the spectrum, or noise in the spectrum, or contention in the spectrum comprises an action of determining available portions of the white-space spectrum, said available portions comprising portions of the white-space spectrum that are not currently being used by any licensed incumbent users in a geographic region comprising the current geographic location of the white-space node, and

whenever the query comprises information specifying that said node wants to use a wide-band network but said node is not capable of performing subcarrier suppression, and there is a plurality of available portions of the white-space spectrum, and all of said available portions are currently being used by other white-space nodes, the recommendation reply comprises information specifying a list of the available portions of the white-space spectrum which are not reserved for use by white-space nodes wanting to use a narrow-band network, and whose current contention level is below a prescribed threshold, and whose current interference level is below another prescribed threshold.

16. A computer-implemented process for optimizing the coexistence of a plurality of different wireless networks that concurrently operate in a common geographic region, comprising:

using a wireless computing device operating in one of said wireless networks comprising a plurality of wireless computing devices to perform the following process actions;

sending a query to a cloud service requesting advice on specific portions of a radio frequency spectrum to use;

sending explicit information to the cloud service that the wireless computing device locally observes about current radio frequency spectrum usage, said information comprising specifying portions of the radio frequency spectrum that are not currently being used by any licensed incumbent users in the current geographic location of the wireless node;

receiving a recommendation reply from the cloud service comprising information specifying recommended portions of the radio frequency spectrum to use in order to minimize one or more of interference in the spectrum, or noise in the spectrum, or contention in the spectrum, said information being based on at least the sent explicit information that the wireless node locally observed about current radio frequency spectrum usage;

selecting one of the recommended portions of the radio frequency spectrum from said information; and

configuring a wireless transmitter and a wireless receiver to communicate in the selected portion of the radio frequency spectrum.

17. The process of claim 16, wherein the different wireless networks comprise white-space networks, the radio frequency spectrum comprises a white-space spectrum, and the information specifying recommended portions of the radio frequency spectrum to use comprises either a list of recommended television channels in the white-space spectrum, or a list of recommended frequency bands in the white-space spectrum.

18. The process of claim 16, wherein the recommendation reply further comprises information specifying one or more of,

a recommended transmission power level to use, or

a recommended subcarrier to suppress, or

a recommended modulation scheme to use.

19. The process of claim 18, further comprising the actions of:

whenever the recommendation reply comprises information specifying a recommended transmission power level to use, configuring the wireless transmitter to transmit at said power level;

whenever the recommendation reply comprises information specifying a recommended subcarrier to suppress, configuring the wireless transmitter to suppress said subcarrier; and

whenever the recommendation reply comprises information specifying a recommended modulation scheme to use, configuring the wireless transmitter to perform said modulation scheme.

20. A computer-implemented process for optimizing the coexistence of a plurality of different white-space networks that concurrently operate in a common geographic region, comprising:

using a computer to perform the following process actions;

receiving a query from a white-space node requesting advice on specific portions of a white-space spectrum to use, wherein said white-space node is a wireless computing device operating in one of said white-space networks comprising a plurality of white-space nodes, and wherein the query comprises,

an identifier that uniquely identifies the white-space node,

information specifying a current geographic location of the white-space node,

information specifying that the white-space node wants to use a long-range network, and

information specifying available portions of the white-space spectrum, said available portions comprising portions of the white-space spectrum that are not currently being used by any licensed incumbent users in a geographic region comprising said location;

running a spectrum recommendation procedure to generate advice on recommended portions of the white-space spectrum for the white-space node to use in order to minimize one or more of interference in the spectrum, or noise in the spectrum, or contention in the spectrum; and

sending a recommendation reply comprising said advice to the white-space node, wherein whenever there is a plurality of available portions of the white-space spectrum and all of the plurality of available portions are currently being used by other white-space nodes, said advice comprises a list of the available portions of the white-space spectrum which are not reserved for use by white-space nodes wanting to use a short-range network, and whose current contention level is below a prescribed threshold, and whose current interference level is below another prescribed threshold.