Methods and arrangements for frequency selective transmission
View Patent ↗Logic may comprise hardware and/or code to select a narrow band from a wider channel bandwidth. Logic of communications between devices may select, e.g., a 1 or 2 MHz sub-channel from a wider channel bandwidth such as 4, 8, and 16 MHz and transmit packets on the selected 1 or 2 MHz channel. For instance, a first device may comprise an access point and a second device may comprise a station such as a low power sensor or a meter that may, e.g., operate on battery power. Logic of the devices may facilitate a frequency selective transmission scheme. Logic of the access point may transmit sounding packets or control frames across the sub-channels of the wide bandwidth channel, facilitating selection by the stations of a sub-channel and subsequent communications on the sub-channel between the access point and the station.
1. At least one non-transitory computer-readable storage medium comprising a set of instructions that, in response to being executed at a station (STA), cause the STA to:
receive a beacon indicating a schedule for transmission of a set of sounding frames for frequency selective transmission channel estimation;
receive the set of sounding frames;
based on the received set of sounding frames, select a subchannel from among a plurality of subchannels of a 4 MHz, 8 MHz, or 16 MHz bandwidth; and
send a power-saving poll (PS-Poll) frame to indicate the selected subchannel.
2. The at least one non-transitory computer-readable storage medium of claim 1 , comprising instructions that, in response to being executed at the STA, cause the STA to receive the set of sounding frames in parallel.
3. The at least one non-transitory computer-readable storage medium of claim 1 , comprising instructions that, in response to being executed at the STA, cause the STA to receive the set of sounding frames in series.
4. The at least one non-transitory computer-readable storage medium of claim 1 , comprising instructions that, in response to being executed at the STA, cause the STA to determine whether to receive the set of sounding frames in series or in parallel based on the beacon.
5. The at least one non-transitory computer-readable storage medium of claim 1 , comprising instructions that, in response to being executed at the STA, cause the STA to send the PS-Poll frame over a primary channel of a basic service set (BSS).
6. The at least one non-transitory computer-readable storage medium of claim 5 , comprising instructions that, in response to being executed at the STA, cause the STA to send the PS-Poll frame at a lowest modulation and coding scheme (MCS) transmission rate for the BSS.
7. The at least one non-transitory computer-readable storage medium of claim 1 , comprising instructions that, in response to being executed at the STA, cause the STA to send the PS-Poll frame over the selected subchannel.
8. The at least one non-transitory computer-readable storage medium of claim 7 , the sending of the PS-Poll frame over the selected subchannel indicating the selected subchannel.
9. The at least one non-transitory computer-readable storage medium of claim 1 , comprising instructions that, in response to being executed at the STA, cause the STA to send the PS-Poll frame during a reserved access window (RAW) for subchannel selection.
10. The at least one non-transitory computer-readable storage medium of claim 1 , comprising instructions that, in response to being executed at the STA, cause the STA to receive a frame over the selected subchannel in response to the PS-Poll frame.
11. The at least one non-transitory computer-readable storage medium of claim 1 , comprising instructions that, in response to being executed at the STA, cause the STA to send a frame over the selected subchannel during a time allocated for data exchange.
12. The at least one non-transitory computer-readable storage medium of claim 1 , comprising instructions that, in response to being executed at the STA, cause the STA to receive the set of sounding frames during a time slot reserved for transmission of the sounding frames.
13. The at least one non-transitory computer-readable storage medium of claim 1 , comprising instructions that, in response to being executed at the STA, cause the STA to receive beacons over more than one subchannel in series.
14. The at least one non-transitory computer-readable storage medium of claim 1 , the beacon to indicate a frequency hopping schedule of an access point (AP).
15. The at least one non-transitory computer-readable storage medium of claim 1 , comprising instructions that, in response to being executed at the STA, cause the STA to receive the set of sounding frames at a target wake time (TWT) for the STA.
16. The at least one non-transitory computer-readable storage medium of claim 1 , the selected subchannel comprising a 1 MHz, 2 MHz, 4 MHz, or 8 MHz subchannel.
17. At least one non-transitory computer-readable storage medium comprising a set of instructions that, in response to being executed at an access point (AP), cause the AP to:
send a beacon to indicate a schedule for transmission of a set of sounding frames for frequency selective transmission channel estimation;
send the set of sounding frames according to the schedule; and
receive a subchannel selection in response to the set of sounding frames, the subchannel selection to indicate a selected subchannel for a station (STA), the selected subchannel to comprise one of a plurality of subchannels of a 4 MHz, 8 MHz, or 16 MHz operating bandwidth of the AP, wherein the subchannel selection comprises a power-saving poll (PS-Poll) frame.
18. The at least one non-transitory computer-readable storage medium of claim 17 , comprising instructions that, in response to being executed at the AP, cause the AP to send the set of sounding frames in parallel.
19. The at least one non-transitory computer-readable storage medium of claim 17 , comprising instructions that, in response to being executed at the AP, cause the AP to send the set of sounding frames in series.
20. The at least one non-transitory computer-readable storage medium of claim 17 , comprising instructions that, in response to being executed at the AP, cause the AP to allocate a reserved access window (RAW) for receipt of the subchannel selection.
21. The at least one non-transitory computer-readable storage medium of claim 17 , comprising instructions that, in response to being executed at the AP, cause the AP to identify the selected subchannel as a subchannel over which the subchannel selection is received.
22. The at least one non-transitory computer-readable storage medium of claim 17 , comprising instructions that, in response to being executed at the AP, cause the AP to receive the subchannel selection over a primary channel of a basic service set (BSS) of the AP.
23. The at least one non-transitory computer-readable storage medium of claim 22 , comprising instructions that, in response to being executed at the AP, cause the AP to receive the subchannel selection at a lowest modulation and coding scheme (MCS) transmission rate for the BSS.
24. The at least one non-transitory computer-readable storage medium of claim 17 , comprising instructions that, in response to being executed at the AP, cause the AP to reserve a time slot for transmission of the set of sounding frames.
25. The at least one non-transitory computer-readable storage medium of claim 17 , comprising instructions that, in response to being executed at the AP, cause the AP to send a frame over the selected subchannel.
26. The at least one non-transitory computer-readable storage medium of claim 17 , comprising instructions that, in response to being executed at the AP, cause the AP to send beacons on more than one channel in parallel.
27. The at least one non-transitory computer-readable storage medium of claim 17 , comprising instructions that, in response to being executed at the AP, cause the AP to send beacons on more than one channel in series.
28. The at least one non-transitory computer-readable storage medium of claim 17 , the beacon to indicate a frequency hopping schedule for the AP.
29. The at least one non-transitory computer-readable storage medium of claim 17 , comprising instructions that, in response to being executed at the AP, cause the AP to send the set of sounding frames at a target wake time (TWT) for the STA.
30. The at least one non-transitory computer-readable storage medium of claim 29 , comprising instructions that, in response to being executed at the AP, cause the AP to reserve the selected subchannel using a network allocation vector (NAV).
31. The at least one non-transitory computer-readable storage medium of claim 17 , the sounding frames comprising clear-to-send (CTS) frames.
32. The at least one non-transitory computer-readable storage medium of claim 17 , the selected subchannel comprising a 1 MHz, 2 MHz, 4 MHz, or 8 MHz subchannel.