Techniques to enhance wireless personal area network performance under interference conditions

Patent metadata

Field	Value
Publication number	US-10405319-B2
Application number	US-201415311804-A
Country	US
Kind code	B2
Filing date	Jun 25, 2014
Priority date	Jun 25, 2014
Publication date	Sep 3, 2019
Grant date	Sep 3, 2019

Abstract

An apparatus to manage wireless communications may include an interface component to monitor channel load over a multiplicity of communications channels in an least one wireless communications band, and an interference management component to identify an active channel of a wireless local area network (WLAN) link, and identify a select channel from the multiplicity of communications channels that is orthogonal to the active channel of the WLAN link to transmit wireless data over a wireless personal area network (WPAN) link.

First claim

What is claimed is:

1. An apparatus, comprising:
an interface circuit element to monitor channel load over a multiplicity of communications channels in at least one wireless communications band and to determine channel load in a channel of the multiplicity of communications channels when channel energy exceeds a clear channel assessment (CCA) threshold; and
an interface management circuit element to identify an active channel of a wireless local area network (WLAN) link, and identify a select channel from the multiplicity of communications channels that is orthogonal to the active channel of the WLAN link to transmit wireless data over a wireless personal area network (WPAN) link.

2. The apparatus of claim 1 , wherein the at least one wireless communications band comprising a 802.11 2.4 GHz band and a 802.11 5 GHz band.

3. The apparatus of claim 1 , wherein the interference management component to determine the select channel by estimating channel throughput in a select 802.11 channel and at least one additional 802.11 channel that is supported by the WPAN link, the select 802.11 channel and at least one additional 802.11 channel being orthogonal to the active channel.

4. The apparatus of claim 1 , wherein the interference management component to identify a highest throughput channel of a multiplicity of 802.11 channels that are orthogonal to the active channel as the select channel.

5. The apparatus of claim 4 , wherein the interference management component to determine the highest throughput channel according to

arg
⁢

{

max

ChY
i

⁢

Exp_TPT
⁢
_Ch
⁢

⁢

Y
i

}

,

_

where max ChYi Exp_TPT_ChY i is maximum expected channel throughput of a set of two or more channels Y i , where Exp_TPT Ch Y i is TPT_ch_Y i (1-channel load), and where TPT_CH_Y i is throughput for channel Y i .

6. The apparatus of claim 1 , wherein the interference management component to:
determine when expected throughput is below a threshold rate for a channel of the multiplicity of communications channels has a highest expected throughput and is orthogonal to the active channel and; and
switch a communications mode from a multihop mode to single hop mode when internet streaming and full screen mode is active.

7. The apparatus of claim 6 , wherein the interference management component to switch communications mode by sending a signal to reroute transmission of the wireless data to a destination from a two-hop transmission over both the WLAN link and WPAN link to a one-hop transmission to the destination over the WLAN link.

8. The apparatus of claim 1 , wherein
the interface component to determine when a congestion indicator value for transmission of wireless data over the WPAN link is above a first threshold; and
the interference management component to reduce a video encoder bit rate for wireless data transmission from a first video encoder bit rate to a second video encoder bit rate when Internet streaming or full screen mode is not active and the congestion indicator value is above the first threshold.

9. The apparatus of claim 8 , wherein the congestion indicator value being determined from statistics of a transport stream muxer pipeline for transmission of the wireless data over the WPAN link, or from estimated WiFi channel bandwidth available for transmission of the wireless data over the WPAN link.

10. The apparatus of claim 8 the interference management component to:
reduce a current bit rate level to a lower bit rate level in a step-like fashion until the congestion indicator value is below the first threshold.

11. The apparatus of claim 8 , the interference management component to reduce a resolution level from a first resolution level to a second resolution level when the congestion indicator value is above the first threshold and a current bit rate level is a lowest bit rate level for the first resolution level.

12. At least one non-transitory computer-readable storage medium comprising instructions that, when executed, cause a system to:
receive channel load from over a multiplicity of communications channels in at least one wireless communications band;
determine channel load in a channel of the multiplicity of communications channels when channel energy exceeds a clear channel assessment (CCA) threshold;
identify an active channel of a wireless local area network (WLAN) link; and
identify a select channel from the multiplicity of communications channels that is orthogonal to the active channel of the WLAN link to transmit wireless data over a wireless personal area network (WPAN) link.

13. The at least one non-transitory computer-readable storage medium of claim 12 , the at least one wireless communications band comprising a 802.11 2.4 GHz band and a 802.11 5 GHz band.

14. The at least one non-transitory computer-readable storage medium of claim 12 , comprising instructions that, when executed, cause a system to determine the select channel by estimating channel throughput in a select 802.11 channel and at least one additional 802.11 channel that is supported by the WPAN link, the select 802.11 channel and at least one additional 802.11 channel being orthogonal to the active channel.

15. The at least one non-transitory computer-readable storage medium of claim 12 , comprising instructions that, when executed, cause a system to identify a highest throughput channel of a multiplicity of 802.11 channels that are orthogonal to the active channel as the select channel.

16. The at least one non-transitory computer-readable storage medium of claim 12 , comprising instructions that, when executed, cause a system to:
determine when expected throughput is below a threshold rate for a channel of the multiplicity of communications channels has a highest expected throughput and is orthogonal to the active channel and; and
switch a communications mode from a multihop mode to single hop mode when internet streaming and full screen mode is active.

17. The at least one non-transitory computer-readable storage medium of claim 12 , comprising instructions that, when executed, cause a system to: send a signal to reroute transmission of the wireless data to a destination from a two-hop transmission over both the WLAN link and WPAN link to a one-hop transmission to the destination over the WLAN link.

18. The at least one non-transitory computer-readable storage medium of claim 12 , comprising instructions that, when executed, cause a system to:
determine when a congestion indicator value for transmission of wireless data over the WPAN link is above a first threshold; and
reduce a video encoder bit rate for wireless data transmission from a first video encoder bit rate

Assignees

• Intel Corp

Inventors

• Shao Lei
• Rajamani Krishnan
• Brabenac Charles L
• Sankar Radhakrishnan
• Karacaoglu Ulun
• Lin Xintian E

Classifications

• H04W72/541 Primary

  using the level of interference · CPC title

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title

• H04W48/18

  Selecting a network or a communication service · CPC title

• H04W48/16

  Discovering, processing access restriction or access information · CPC title

• H04W28/0236

  radio quality, e.g. interference, losses or delay · CPC title