Wi-Fi scan operation on a dynamic frequency selection master dual band simultaneous device

Patent metadata

Field	Value
Publication number	US-10051558-B2
Application number	US-201615148066-A
Country	US
Kind code	B2
Filing date	May 6, 2016
Priority date	May 6, 2016
Publication date	Aug 14, 2018
Grant date	Aug 14, 2018

Abstract

Methods, systems, and devices for wireless communication are described. An access point (AP) transmits instructions to quiet a dynamic frequency selection (DFS) home channel for a period of time. Instructions can include a quiet information element (IE) or a clear-to-send to self (CTS2Self) frame. The AP then allocates a first dedicated RF chain to a first media access control (MAC) component and a second dedicated RF chain, separate from the first dedicated RF chain, to a second MAC component of the access point. The allocation can include reducing the number of RF chains dedicated to the first MAC component. During the time period determined by the instructions, the first dedicated RF chain scans the home DFS channel and the second dedicated RF chain scans at least one other channel (e.g., based at least in part on the time period and channel scan priority) in the same band as the DFS home channel.

First claim

What is claimed is:

1. A method of wireless communication at an access point, comprising:
transmitting an instruction to quiet a dynamic frequency selection (DFS) home channel for a specified period of time;
allocating a first dedicated RF chain to a first media access control (MAC) component of the access point;
allocating a second dedicated RF chain, separate from the first dedicated RF chain, to a second MAC component of the access point;
determining a number of channels to scan during the specified period of time based at least in part on the specified period of time and a scan priority associated with each of the channels of the number of channels;
scanning the home DFS channel using the first dedicated RF chain during the specified period of time; and
scanning one or more other channels in a same band as the DFS home channel using the second dedicated RF chain during the specified period of time.

2. The method of claim 1 , wherein determining the number of channels to scan is further based at least in part on a traffic latency parameter of the DFS home channel.

3. The method of claim 1 , wherein allocating the first dedicated RF chain to the first MAC component comprises:
reducing a number of RF chains allocated to the first MAC component.

4. The method of claim 3 , further comprising:
discontinuing the scanning of the one or more other channels in the same band as the DFS home channel at the end of the specified time frame; and
reallocating the second dedicated RF chain to the first MAC component.

5. The method of claim 1 , further comprising:
discontinuing data transmissions by the access point on the DFS home channel during the specified time period.

6. The method of claim 1 , wherein the instruction is from the group consisting of:
a quiet information element (IE) and a clear-to-send (CTS) to self frame.

7. The method of claim 1 , wherein a scan timing of the home DFS channel and the one or more other channels in the same band as the DFS channel are synchronized.

8. The method of claim 1 , further comprising:
returning to a distributed coordination function mode of operation at the conclusion of the specified period of time.

9. An access point for wireless communication, comprising:
means for transmitting an instruction to quiet a dynamic frequency selection (DFS) home channel for a specified period of time;
means for allocating a first dedicated RF chain to a first media access control (MAC) component of the access point;
means for allocating a second dedicated RF chain, separate from the first dedicated RF chain, to a second MAC component of the access point;
means for determining a number of channels to scan during the specified period of time based at least in part on the specified period of time and a scan priority associated with each of the channels of the number of channels;
means for scanning the home DFS channel using the first dedicated RF chain during the specified period of time; and
means for scanning one or more other channels in a same band as the DFS home channel using the second dedicated RF chain during the specified period of time.

10. The access point of claim 9 , wherein determining the number of channels to scan is further based at least in part on a traffic latency parameter of the DFS home channel.

11. The access point of claim 9 , wherein allocating the first dedicated RF chain to the first MAC component comprises:
reducing a number of RF chains allocated to the first MAC component.

12. The access point of claim 11 , further comprising:
means for discontinuing the scanning of the one or more other channels in the same band as the DFS home channel at the end of the specified time frame; and
means for reallocating the second dedicated RF chain to the first MAC component.

13. The access point of claim 9 , further comprising:
means for discontinuing data transmissions by the access point on the DFS home channel during the specified time period.

14. The access point of claim 9 , wherein the instruction is from the group consisting of:
a quiet information element (IE) and a clear-to-send (CTS) to self frame.

15. The access point of claim 9 , wherein a scan timing of the home DFS channel and the one or more other channels in the same band as the DFS channel are synchronized.

16. The access point of claim 9 , further comprising:
means for returning to a distributed coordination function mode of operation at the conclusion of the specified period of time.

17. An access point for wireless communication, comprising:
a processor;
memory in electronic communication with the processor; and
instructions stored in the memory and operable, when executed by the processor, to cause the access point to:
transmit an instruction to quiet a dynamic frequency selection (DFS) home channel for a specified period of time;
allocate a first dedicated RF chain to a first media access control (MAC) component of the access point;
allocate a second dedicated RF chain, separate from the first dedicated RF chain, to a second MAC component of the access point;
determine a number of channels to scan during the specified period of time based at least in part on the specified period of time and a scan priority associated with each of the channels of the number of channels;
scan the home DFS channel using the first dedicated RF chain during the specified period of time; and
scan one or more other channels in a same band as the DFS home channel using the second dedicated RF chain during the specified period of time.

18. The access point of claim 17 , wherein determining the number of channels to scan is further based at least in part on a traffic latency parameter of the DFS home channel.

19. The access point of claim 17 , wherein allocating the first dedicated RF chain to the first MAC component comprises:
reducing a number of RF chains allocated to the first MAC component.

20. The access point of claim 19 , wherein the instructions are operable to cause the processor to:
discontinue the scanning of the one or more other channels in the same band as the DFS home channel at the end of the specified time frame; and
reallocate the second dedicated RF chain to the first MAC component.

21. The access point of claim 17 , wherein the instructions are operable to cause the processor to:
discontinue data transmissions by the access point on the DFS home channel during the specified time period.

22. The access point of claim 17 , wherein the instruction is from the group consisting of:
a quiet information element (IE) and a clear-to-send (CTS) to self frame.

23. The access point of claim 17 , wherein a scan timing of the home DFS channel and the one or more other channels in the same band as the DFS channel are synchronized.

24. The access point of claim 17 , wherein the instructions are operable to cause the processor to:
return to a distributed coordination function mode of operation at the conclusion of the specified period of time.

25. A non-transitory computer-readable medium storing code for wireless communication at an access point, the code comprising instructions executable by a processor to cause the access point to:
transmit an instruction to quiet a dynamic frequency selection (DFS) home channel for a specified period of time;
allocate a first dedicated RF chain to a first media access control (MAC) component of the access point;
allocate a secon

Assignees

• Qualcomm Inc

Inventors

• Phogat Vikram
• Gidvani Ravi
• Stanton Gerald
• Bahini Dagbegnon Henri
• Anand Kumar
• Bhattacharyya Tushnim

Classifications

• H04W72/56

  based on priority criteria · CPC title

• H04W16/14

  Spectrum sharing arrangements {between different networks} · CPC title

• H04W88/08

  Access point devices · CPC title

• H04B7/0413

  MIMO systems · CPC title

• H04W48/16 Primary

  Discovering, processing access restriction or access information · CPC title