Coexistence support for multi-channel wireless communications

• US 9,386,475 B2
• Filed: 10/28/2013
• Issued: 07/05/2016
• Est. Priority Date: 08/04/2010
• Status: Active Grant

• Current Assignee: Marvell Asia Pte Limited (Marvell Technology Group Limited)
• Original Assignee: Marvell World Trade Limited (Marvell Technology Group Limited)
• Inventors: Liu, Yong, Ramamurthy, Harish
• Primary Examiner(s): Ly, Anh-Vu
• Assistant Examiner(s): Ortiz, Hector Reyes
• Application Number:
  US14/065,222
• Publication Number:
  US 20140050093A1
• Time in Patent Office: 981 Days
• US Class Current: 1/1
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 28/0205 at the air interface dynamic wireless traffic scheduling H04W72/12
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal

Abstract

Systems and techniques relating to wireless communications are described. A described technique includes monitoring a group of wireless channels for signals from one or more devices; identifying, within the group, one or more primary channels on which one or more signals are received from the one or more devices; and selecting, from the group of wireless channels, a primary channel for a wireless communication based on the one or more identified primary channels and an estimated traffic load associated with at least a portion of the group of wireless channels. The selecting can include using a first channel that is separate from the one or more identified primary channels as the selected primary channel when the estimated traffic load exceeds a threshold, and using a second channel from the one or more identified primary channels as the selected primary channel when the estimated traffic load does not exceed the threshold.

Claims

1. A method comprising:

monitoring, at a first wireless communication device, a group of wireless channels for signals from one or more second wireless communication devices;

identifying, within the group of wireless channels, one or more primary channels on which one or more signals are received from the one or more second wireless communication devices;

calculating one or more busy-to-idle ratios of the one or more identified primary channels based on one or more channel conditions of the one or more identified primary channels; and

selecting, from the group of wireless channels, a primary channel for the first wireless communication device based on an estimated traffic load associated with at least a portion of the group of wireless channels, wherein the estimated traffic load is based on the one or more busy-to-idle ratios, and wherein selecting the primary channel for the first wireless communication device comprises;

using, within the group of wireless channels, a secondary channel as the selected primary channel when the estimated traffic load exceeds a threshold, and

using at least one of the one or more identified primary channels as the selected primary channel when the estimated traffic load does not exceed the threshold.

2. The method of claim 1, wherein the group of wireless channels comprises two frequency portions, each of the two frequency portions occupying a consecutive frequency band that is one half of an aggregated frequency bandwidth associated with the group of wireless channels.

3. The method of claim 2, wherein the selected primary channel is a frequency portion of the two frequency portions, the frequency portion having a frequency band separate from one or more frequency bands associated with the one or more identified primary channels.

4. The method of claim 1, wherein the one or more signals are received from one second wireless communication device, and wherein the selected primary channel is a primary channel of the one second communication device on which the one or more signals are received.

5. The method of claim 1, wherein at least a subset of the group of wireless channels does not overlap with wireless channels that are usable by the one or more second wireless communication devices, and wherein the selected primary channel is a channel in the at least the subset of the group of wireless channels.

6. The method of claim 1, wherein the one or more second wireless communication devices comprises a device that uses a 20 MHz primary channel, a 20 MHz secondary channel, and a 40 MHz secondary channel, and wherein the selected primary channel is a channel in the 40 MHz secondary channel.

7. The method of claim 1, wherein the one or more second wireless communication devices comprises a device that uses a 20 MHz primary channel, a 20 MHz secondary channel, a 40 MHz secondary channel, and an 80 MHz secondary channel, and wherein the selected primary channel is a channel in the 80 MHz secondary channel.

8. An apparatus, comprising:

first circuitry configured to monitor a group of wireless channels for signals from one or more wireless communication devices; and

second circuitry configured to identify, within the group of wireless channels, one or more primary channels on which one or more signals are received from the one or more wireless communication devices, and select, from the group of wireless channels, a primary channel for a wireless communication based on the one or more identified primary channels and an estimated traffic load associated with at least a portion of the group of wireless channels, wherein the selected primary channel is a first channel that is separate from the one or more identified primary channels if the estimated traffic load exceeds a threshold, and wherein the selected primary channel is a second channel from the one or more identified primary channels if the estimated traffic load does not exceed the threshold,

wherein the second circuitry is configured to calculate one or more busy-to-idle ratios of the one or more identified primary channels based on one or more channel conditions of the one or more identified primary channels, and wherein the estimated traffic load is based on the one or more busy-to-idle ratios.

9. The apparatus of claim 8, wherein the second circuitry comprises circuitry configured to measure the one or more channel conditions of the one or more identified primary channels.

10. The apparatus of claim 8, wherein the group of wireless channels comprises two frequency portions, each of the two frequency portions occupying a consecutive frequency band that is one half of an aggregated frequency bandwidth associated with the group of wireless channels.

11. The apparatus of claim 10, wherein the selected primary channel is a frequency portion of the two frequency portions, the frequency portion having a frequency band separate from one or more frequency bands associated with the one or more identified primary channels.

12. The apparatus of claim 8, wherein the one or more signals are received from one wireless communication device, and wherein the selected primary channel is a primary channel of the one wireless communication device on which the one or more signals are received.

13. The apparatus of claim 8, wherein at least a subset of the group of wireless channels does not overlap with wireless channels that are usable by the one or more wireless communication devices, and wherein the selected primary channel is a channel in the at least the subset of the group of wireless channels.

14. The apparatus of claim 8, wherein the one or more wireless communication devices comprises a device that uses a 20 MHz primary channel, a 20 MHz secondary channel, and a 40 MHz secondary channel, and wherein the selected primary channel is a channel in the 40 MHz secondary channel.

15. The apparatus of claim 8, wherein the one or more wireless communication devices comprises a device that uses a 20 MHz primary channel, a 20 MHz secondary channel, a 40 MHz secondary channel, and an 80 MHz secondary channel, and wherein the selected primary channel is a channel in the 80 MHz secondary channel.

16. A system comprising:

transceiver electronics; and

processor electronics coupled with the transceiver electronics, configured to perform operations comprising;

monitoring a group of wireless channels for signals from one or more wireless communication devices;

identifying, within the group of wireless channels, one or more primary channels on which one or more signals are received from the one or more wireless communication devices;

calculating one or more busy-to-idle ratios of the one or more identified primary channels based on one or more channel conditions of the one or more identified primary channels; and

selecting, from the group of wireless channels, a primary channel for a wireless communication based on an estimated traffic load associated with at least a portion of the group of wireless channels, wherein the estimated traffic load is based on the one or more busy-to-idle ratios, and wherein selecting the primary channel for the wireless communication comprises using, within the group of wireless channels, a secondary channel as the selected primary channel when the estimated traffic load exceeds a threshold, and using at least one of the one or more identified primary channels as the selected primary channel when the estimated traffic load does not exceed the threshold.

17. The system of claim 16, wherein the group of wireless channels comprises two frequency portions, each of the two frequency portions occupying a consecutive frequency band that is one half of an aggregated frequency bandwidth associated with the group of wireless channels.

18. The system of claim 17, wherein the selected primary channel is a frequency portion of the two frequency portions, the frequency portion having a frequency band separate from one or more frequency bands associated with the one or more identified primary channels.

19. The system of claim 16, wherein the one or more signals are received from one wireless communication device, and wherein the selected primary channel is a primary channel of the one wireless communication device on which the one or more signals are received.

20. The system of claim 16, wherein at least a subset of the group of wireless channels does not overlap with wireless channels that are usable by the one or more wireless communication devices, and wherein the selected primary channel is a channel in the at least the subset of the group of wireless channels.

21. The system of claim 16, wherein the one or more wireless communication devices comprises a device that uses a 20 MHz primary channel, a 20 MHz secondary channel, and a 40 MHz secondary channel, and wherein the selected primary channel is a channel in the 40 MHz secondary channel.

22. The system of claim 16, wherein the one or more wireless communication devices comprises a device that uses a 20 MHz primary channel, a 20 MHz secondary channel, a 40 MHz secondary channel, and an 80 MHz secondary channel, and wherein the selected primary channel is a channel in the 80 MHz secondary channel.