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. An apparatus, comprising:
a transceiver; and
a station (STA) comprising logic, at least a portion of which is in hardware, the logic to receive a beacon to indicate a schedule for transmission of a set of sounding frames for frequency selective transmission channel estimation in a Wireless Fidelity (Wi-Fi) network, receive the set of sounding frames, select a subchannel based on the received set of sounding frames, and send a power-saving poll (PS-Poll) frame to indicate the selected subchannel.
2. The apparatus of claim 1 , the logic to receive the set of sounding frames in parallel.
3. The apparatus of claim 1 , the logic to receive the set of sounding frames in series.
4. The apparatus of claim 1 , the logic to determine whether to receive the set of sounding frames in series or in parallel based on the beacon.
5. The apparatus of claim 1 , the logic to send the PS-Poll frame over a primary channel of a basic service set (BSS).
6. The apparatus of claim 5 , the logic to send the PS-Poll frame at a lowest modulation and coding scheme (MCS) transmission rate for the BSS.
7. The apparatus of claim 1 , the logic to send the PS-Poll frame over the selected subchannel.
8. The apparatus of claim 7 , the sending of the PS-Poll frame over the selected subchannel indicating the selected subchannel.
9. The apparatus of claim 1 , the logic to send the PS-Poll frame during a reserved access window (RAW) for subchannel selection.
10. The apparatus of claim 1 , the logic to receive a frame over the selected subchannel in response to the PS-Poll frame.
11. The apparatus of claim 1 , the logic to send a frame over the selected subchannel during a time allocated for data exchange.
12. The apparatus of claim 1 , the logic to receive the set of sounding frames during a time slot reserved for transmission of the sounding frames.
13. The apparatus of claim 1 , the logic to receive beacons over more than one subchannel in series.
14. The apparatus of claim 1 , the beacon to indicate a frequency hopping schedule of an access point (AP).
15. The apparatus of claim 1 , the logic to receive the set of sounding frames at a target wake time (TWT) for the STA.
16. The apparatus of claim 1 , the selected subchannel comprising a 1 MHz, 2 MHz, 4 MHz, or 8 MHz subchannel.
17. The apparatus of claim 1 , the logic to select the selected subchannel from among a plurality of subchannels of a 4 MHz, 8 MHz, or 16 MHz bandwidth.
18. The apparatus of claim 1 , comprising:
a memory; and
at least one radio.
19. The apparatus of claim 18 , comprising at least one antenna.
20. An apparatus, comprising:
a transceiver; and
an access point (AP) comprising logic, at least a portion of which is in hardware, the logic to send a beacon to indicate a schedule for transmission of a set of sounding frames for frequency selective transmission channel estimation in a Wireless Fidelity (Wi-Fi) network, 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).
21. The apparatus of claim 20 , the logic to send the set of sounding frames in parallel.
22. The apparatus of claim 20 , the logic to send the set of sounding frames in series.
23. The apparatus of claim 20 , the logic to allocate a reserved access window (RAW) for receipt of the subchannel selection.
24. The apparatus of claim 20 , the subchannel selection comprising a power-saving poll (PS-Poll) frame.
25. The apparatus of claim 20 , the logic to identify the selected subchannel as a subchannel over which the subchannel selection is received.
26. The apparatus of claim 20 , the logic to receive the subchannel selection over a primary channel of a basic service set (BSS) of the AP.
27. The apparatus of claim 26 , the logic to receive the subchannel selection at a lowest modulation and coding scheme (MCS) transmission rate for the BSS.
28. The apparatus of claim 20 , the logic to reserve a time slot for transmission of the set of sounding frames.
29. The apparatus of claim 20 , the logic to send a frame over the selected subchannel.
30. The apparatus of claim 20 , the logic to send beacons on more than one channel in parallel.
31. The apparatus of claim 20 , the logic to send beacons on more than one channel in series.
32. The apparatus of claim 20 , the beacon to indicate a frequency hopping schedule for the AP.
33. The apparatus of claim 20 , the logic to send the set of sounding frames at a target wake time (TWT) for the STA.
34. The apparatus of claim 33 , the logic to reserve the selected subchannel using a network allocation vector (NAV).
35. The apparatus of claim 20 , the sounding frames comprising clear-to-send (CTS) frames.
36. The apparatus of claim 20 , the selected subchannel comprising a 1 MHz, 2 MHz, 4 MHz, or 8 MHz subchannel.
37. The apparatus of claim 20 , the selected subchannel comprising one of a plurality of subchannels of a 4 MHz, 8 MHz, or 16 MHz operating bandwidth of the AP.
38. The apparatus of claim 20 , comprising:
a memory; and
at least one radio.
39. The apparatus of claim 38 , comprising at least one antenna.