METHOD AND DEVICE FOR TRANSMITTING DATA IN A WIRELESS COMMUNICATION NETWORK

• US 20120045012A1
• Filed: 09/26/2008
• Published: 02/23/2012
• Est. Priority Date: 09/26/2008
• Status: Abandoned Application

• Current Assignee: Motorola Solutions, Inc.
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Alapuranen, Pertti O.
• Application Number:
  US12/239,703
• Publication Number:
  US 20120045012A1
• Time in Patent Office: Days
• US Class Current: 375/295
• CPC Class Codes: H04B 7/04 using two or more spaced independent antennas
• 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: H04W 72/00 Local resource management
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

A method and device for transmitting data in a wireless communication network uses both cognitive frequency diversity and antenna diversity. The method includes identifying a bandwidth of one or more potentially interfering frequency sub-bands from one or more potentially interfering signals in a radio frequency (RF) band (step 605). Next, based on the bandwidth of the one or more potentially interfering frequency sub-bands, occupancy probabilities are calculated concerning whether the one or more potentially interfering frequency sub-bands will occupy each of a plurality of transmitting sub-bands in the RF band (step 610). Finally, the data are transmitted simultaneously over first and second transmitting sub-bands selected from the plurality of transmitting sub-bands based on the occupancy probabilities, where a first antenna transmits in the first transmitting sub-band and a second antenna transmits in the second transmitting sub-band (step 615).

Claims

1. A method for transmitting data in a wireless communication network using cognitive frequency diversity and antenna diversity, the method comprising:

identifying a bandwidth of one or more potentially interfering frequency sub-bands from one or more potentially interfering signals in a radio frequency band;

calculating, based on the bandwidth of the one or more potentially interfering frequency sub-bands, occupancy probabilities that the one or more potentially interfering frequency sub-bands will occupy each of a plurality of transmitting sub-bands in the radio frequency band; and

transmitting the data simultaneously over first and second transmitting sub-bands selected from the plurality of transmitting sub-bands based on the occupancy probabilities, wherein a first antenna transmits in the first transmitting sub-band and a second antenna transmits in the second transmitting sub-band.

2. The method of claim 1, further comprising transmitting to another node in the wireless communication network data that identify the occupancy probabilities.

3. The method of claim 1, wherein the first transmitting sub-band defines, based on the occupancy probabilities, a least occupied sub-band.

4. The method of claim 3, wherein the second transmitting sub-band defines, based on the occupancy probabilities, a second least occupied sub-band that is separated from the first transmitting sub-band by at least the identified bandwidth of the one or more potentially interfering frequency sub-bands.

5. The method of claim 1, wherein the identified bandwidth is a most common bandwidth in the one or more potentially interfering frequency sub-bands.

6. The method of claim 1, wherein selection diversity combiner (SDC) techniques are used to select at least one of the first and second transmitting sub-bands.

7. The method of claim 1, wherein the radio frequency band comprises a 2.4 GHz ISM band.

8. The method of claim 1, wherein the potentially interfering frequency sub-bands define IEEE 802.11 channels.

9. The method of claim 1, wherein one or more of the potentially interfering frequency sub-bands has a bandwidth of 20 MHz.

10. A device for transmitting data in a wireless communication network using cognitive frequency diversity and antenna diversity, comprising:

computer readable program code components for identifying a bandwidth of one or more potentially interfering frequency sub-bands from one or more potentially interfering signals in a radio frequency band;

computer readable program code components for calculating, based on the bandwidth of the one or more potentially interfering frequency sub-bands, occupancy probabilities that the one or more potentially interfering frequency sub-bands will occupy each of a plurality of transmitting sub-bands in the radio frequency band; and

computer readable program code components for transmitting the data simultaneously over first and second transmitting sub-bands selected from the plurality of transmitting sub-bands based on the occupancy probabilities, wherein a first antenna transmits in the first transmitting sub-band and a second antenna transmits in the second transmitting sub-band.

11. The device of claim 10, further comprising computer readable program code components for transmitting to another node in the wireless communication network data that identify the first occupancy probabilities.

12. The device of claim 10, wherein the first transmitting sub-band defines, based on the occupancy probabilities, a least occupied sub-band.

13. The device of claim 12, wherein the second transmitting sub-band defines, based on the occupancy probabilities, a second least occupied sub-band that is separated from the first transmitting sub-band by at least the identified bandwidth of the one or more potentially interfering frequency sub-bands.

14. The device of claim 10, wherein the identified bandwidth is a most common bandwidth in the one or more potentially interfering frequency sub-bands.

15. The device of claim 10, wherein selection diversity combiner (SDC) techniques are used to select the data in one of the sub-bands.

16. The device of claim 10, wherein the radio frequency band comprises a 2.4 GHz ISM band.

17. The device of claim 10, wherein the potentially interfering frequency sub-bands define IEEE 802.11 channels.

18. The device of claim 10, wherein one or more of the potentially interfering frequency sub-bands has a bandwidth of 20 MHz.

19. A device for transmitting data in a wireless communication network using cognitive frequency diversity and antenna diversity, comprising:

means for identifying a bandwidth of one or more potentially interfering frequency sub-bands from one or more potentially interfering signals in a radio frequency band;

means for calculating, based on the bandwidth of the one or more potentially interfering frequency sub-bands, occupancy probabilities that the one or more potentially interfering frequency sub-bands will occupy each of a plurality of transmitting sub-bands in the radio frequency band; and

means for transmitting the data simultaneously over first and second transmitting sub-bands selected from the plurality of transmitting sub-bands based on the occupancy probabilities, wherein a first antenna transmits in the first transmitting sub-band and a second antenna transmits in the second transmitting sub-band.