Methods and apparatus for channel selection in a wireless local area network

Patent metadata

Field	Value
Publication number	US-9433008-B2
Application number	US-201414275714-A
Country	US
Kind code	B2
Filing date	May 12, 2014
Priority date	May 12, 2014
Publication date	Aug 30, 2016
Grant date	Aug 30, 2016

Abstract

In an aspect, methods and apparatus of communication include detecting a channel reselection condition for triggering reselection from a current channel to a first potential channel. The methods and apparatus further include determining that a first timer value meets or exceeds a first timer threshold value based at least in part on detecting the channel reselection condition. Additionally, the methods and apparatus include selecting the first potential channel from a channel list when the first timer value meets or exceeds the first timer threshold value. In another aspect, methods and apparatus include detecting an initial channel selection condition for triggering selection of a first initial channel. The methods and apparatus further include forming a channel list including one or more channels based on one or more channel selection parameters. Additionally, the methods and apparatus include selecting the first initial channel from the channel list.

First claim

What is claimed is:

1. A method of communication, comprising:
detecting, at an access point, a channel reselection condition for triggering reselection from a current channel to a first potential channel;
determining that a first timer value meets or exceeds a first timer threshold value based at least in part on detecting the channel reselection condition;
selecting the first potential channel from a channel list when the first timer value meets or exceeds the first timer threshold value;
determining whether a second timer value associated with the first potential channel meets or exceeds a second timer threshold value; and
communicating with at least one access terminal over the current channel or the first potential channel based on the determining whether the second timer value associated with the first potential channel meets or exceeds the second timer threshold value.

2. The method of claim 1 , wherein the second timer value comprises a time duration value between a previous selection of the first potential channel by the access point and a current selection of the first potential channel.

3. The method of claim 1 , further comprising performing channel reselection to the first potential channel when the second timer value meets or exceeds the second timer threshold value.

4. The method of claim 1 , further comprising selecting a second potential channel from the channel list when the second timer value does not meet or exceed the second timer threshold value, wherein the second potential channel corresponds to a subsequent most suitable available channel in the channel list.

5. The method of claim 1 , wherein the first timer value comprises a time duration value between a selection of the current channel by the access point and the detection of the channel reselection condition.

6. The method of claim 1 , wherein detecting the channel reselection condition comprises determining that a current channel quality value meets or is less than a first quality threshold value, wherein the current channel quality value corresponds to the current channel on which the access point is currently communicating.

7. The method of claim 6 , wherein one or both of the current channel quality value and the first quality threshold value are based at least in part on one or more of a load level value, a traffic class indication, a quality of service (QoS) value, a received power indicator, a throughput value, an offered load value, a retransmission probability value, a channel busy time value, an interference level value, a spectral scan measurement value, an 802.11k measurement value, and the channel list.

8. The method of claim 1 , wherein detecting the channel reselection condition comprises determining that a potential channel quality gain value associated with the first potential channel meets or exceeds a second quality threshold value, wherein one or both of the potential channel quality gain value and the second quality threshold value are determined based at least in part on utility criteria.

9. The method of claim 8 , wherein the channel list comprises a list of one or more channels including the current channel and ranked according to the utility criteria, and wherein the first potential channel corresponds to a most suitable available channel in the channel list.

10. The method of claim 9 , wherein the utility criteria comprise one or more of a received power indicator value, a noise level value, a channel available time value, an effective theoretical capacity value, an interference level value, a spectral scan value, and a 802.11 measurement value.

11. The method of claim 10 , further comprising determining the effective theoretical capacity value as a function of one or more of a downlink power value, a number of access points, a number of access points communicating on the current channel, wherein the effective theoretical capacity indicates a maximum downlink capacity at the access point.

12. The method of claim 1 , wherein the access point communicates according to a wireless local area network technology.

13. A non-transitory computer-readable medium storing computer executable instructions for communication, wherein the instructions are executable by a computer to:
detect, at an access point, a channel reselection condition for triggering reselection from a current channel to a first potential channel;
determine that a first timer value meets or exceeds a first timer threshold value based at least in part on detecting the channel reselection condition;
select the first potential channel from a channel list when the first timer value meets or exceeds the first timer threshold value;
determine whether a second timer value associated with the first potential channel meets or exceeds a second timer threshold value; and
communicate with at least one access terminal over the current channel or the first potential channel based on the determining whether the second timer value associated with the first potential channel meets or exceeds the second timer threshold value.

14. An apparatus for communication, comprising:
means for detecting, at an access point, a channel reselection condition for triggering reselection from a current channel to a first potential channel;
means for determining that a first timer value meets or exceeds a first timer threshold value based at least in part on detecting the channel reselection condition;
means for selecting the first potential channel from a channel list when the first timer value meets or exceeds the first timer threshold value;
means for determining whether a second timer value associated with the first potential channel meets or exceeds a second timer threshold value; and
means for communicating with at least one access terminal over the current channel or the first potential channel based on the determining whether the second timer value associated with the first potential channel meets or exceeds the second timer threshold value.

15. An apparatus for communication, comprising:
a memory storing executable instructions; and
a processor in communication with the memory, wherein the processor is configured to execute the instructions to:
detect, at an access point, a channel reselection condition for triggering reselection from a current channel to a first potential channel;
determine that a first timer value meets or exceeds a first timer threshold value based at least in part on detecting the channel reselection condition;
select the first potential channel from a channel list when the first timer value meets or exceeds the first timer threshold value;
determine whether a second timer value associated with the first potential channel meets or exceeds a second timer threshold value; and
communicate with at least one access terminal over the current channel or the first potential channel based on the determining whether the second timer value associated with the first potential channel meets or exceeds the second timer threshold value.

16. The apparatus of claim 15 , wherein the second timer value comprises a time duration value between a previous selection of the first potential channel by the access point and a current selection of the first potential channel.

17. The apparatus of claim 15 , wherein the processor is further configured to execute the instructions to perform channel reselection to the first potential channel when the second timer value meets or exceeds the second timer threshold value.

18. The apparatus of claim 15 , wherein the processor is further configured to execute the instru

Assignees

• Qualcomm Inc

Inventors

• Werner Marc Walter
• Garavaglia Andrea
• Stupar Patrick
• Sadek Ahmed Kamel

Classifications

• H04W72/0453

  Resources in frequency domain, e.g. a carrier in FDMA · CPC title

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title

• H04W72/542 Primary

  using measured or perceived quality · CPC title

• H04W72/085 Primary

  Electricity · mapped topic