Methods and arrangements for frequency selective transmission
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. A method comprising:
transmitting sounding packets, by an access point during a sounding period of a beacon interval, wherein the sounding period is a window of time reserved for sounding, wirelessly on sub-channels of a wide bandwidth channel;
receiving a selection of a selected sub-channel from a communications device within a restricted access window (RAW) of the beacon interval, the RAW for transmission of a frame by the communication device to communicate the selected sub-channel; and
communicating with the communications device via the selected sub-channel.
2. The method of claim 1 , further comprising transmitting a beacon to communicate time slots during which an access point will remain on each sub-channel to the communications device during the beacon interval.
3. The method of claim 1 , further comprising transmitting a beacon to communicate a time slot assignment to the communications device during the beacon interval.
4. The method of claim 1 , further comprising transmitting a management frame to communicate a target wake time to the communications device.
5. The method of claim 1 , wherein transmitting the sounding packets comprises transmitting the sounding packets across all the sub-channels of the wide bandwidth channel during the sounding period simultaneously, sequentially, or simultaneously multiple times.
6. The method of claim 1 , wherein transmitting the sounding packets comprises transmitting control frames across the sub-channels during the sounding period.
7. The method of claim 1 , wherein transmitting the sounding packets comprises transmitting beacons.
8. The method of claim 1 , wherein receiving a selection comprises receiving a power saving poll or other trigger frame.
9. The method of claim 1 , wherein receiving a selection comprises receiving a communication from the communications device via the selected sub-channel.
10. An apparatus comprising:
memory;
a processor coupled with the memory to send sounding packets, during a sounding period of a beacon interval, wherein the sounding period is a window of time reserved for sounding, wirelessly on sub-channels of a wide bandwidth channel; receive a selection of a selected sub-channel from a communications device within a restricted access window (RAW) of the beacon interval, the RAW for transmission of a frame by the communication device to communicate the selected sub-channel; and communicate with the communications device via the selected sub-channel.
11. The apparatus of claim 10 , further comprising a radio coupled with the processor and an antenna to transmit the packets, the memory coupled with the processor to store frames to communicate with the communications device.
12. The apparatus of claim 10 , the processor to send a beacon to communicate time slots during which an access point will remain on each sub-channel to the communications device during the beacon interval.
13. The apparatus of claim 10 , the processor to send a beacon to communicate a time slot assignment to the communications device during the beacon interval.
14. The apparatus of claim 10 , the processor to send the sounding packets across the sub-channels of the wide bandwidth channel during the sounding period.
15. The apparatus of claim 10 , the processor to send control frames across all the sub-channels during a sounding period.
16. A program product comprising:
a non-transitory storage medium comprising instructions to be executed by a processor-based device, wherein the instructions, when executed by the processor-based device, perform operations, the operations comprising:
transmitting sounding packets, by an access point during a sounding period of a beacon interval, wherein the sounding period is a window of time reserved for sounding, wirelessly on sub-channels of a wide bandwidth channel;
receiving a selection of a selected sub-channel from a communications device within a restricted access window (RAW) of the beacon interval, the RAW for transmission of a frame by the communication device to communicate the selected sub-channel; and
communicating with the communications device via the selected sub-channel.
17. The program product of claim 16 , wherein the operations further comprise:
transmitting a beacon to communicate time slots during which an access point will remain on each sub-channel to the communications device during the beacon interval.
18. The program product of claim 16 , wherein the operations further comprise:
transmitting a beacon to communicate a time slot assignment to the communications device during the beacon interval.
19. A method comprising:
receiving, by a communications device, sounding packets wirelessly on sub-channels of a wide bandwidth channel during a sounding period of a beacon interval, wherein the sounding period is a window of time reserved for sounding;
determining a selected sub-channel by the communications device; and
communicating with the receiving communications device via the selected sub-channel within a restricted access window (RAW) of the beacon interval, the RAW for transmission of a frame by the communication device to communicate the selected sub-channel.
20. The method of claim 19 , further comprising receiving a beacon comprising time slots during which an access point will remain on each sub-channel during a beacon interval.
21. The method of claim 19 , further comprising receiving a beacon comprising a time slot assignment for the communications device during a beacon interval.
22. The method of claim 19 , wherein receiving the sounding packets comprises receiving sounding packets across all the sub-channels during the sounding period of the beacon interval.
23. The method of claim 19 , wherein receiving the packets comprises receiving control frames across the sub-channels during the sounding period of the beacon interval.
24. The method of claim 19 , wherein receiving the packets comprises receiving beacons on the sub-channels.
25. The method of claim 19 , wherein communicating with the receiving communications device via the selected sub-channel comprises transmitting a power-saving poll (PS-Poll) or trigger frame to the access point to select the selected sub-channel.