Apparatus, system and method of multi user (MU) fine timing measurement (FTM)
Some demonstrative embodiments include apparatuses, systems and/or methods of Multi User (MU) Fine Timing Measurement (FTM). For example, a wireless station may be configured to transmit a trigger frame including a resource allocation of a plurality of resource slots to a plurality of wireless stations; to process a plurality of Non-Data Packet (NDP) transmissions from the plurality of wireless stations according to the resource allocation; to transmit an NDP; and to transmit a MU FTM message including timing information corresponding to the NDP and timing information corresponding to the plurality of NDP transmissions from the plurality of wireless stations.
1. An apparatus comprising:
a memory; and
a processor configured to cause a wireless station to:
transmit a trigger frame comprising a resource allocation of a plurality of resource slots to a plurality of wireless stations;
process a plurality of Non-Data Packet (NDP) transmissions from the plurality of wireless stations according to the resource allocation;
transmit an NDP; and
transmit a Multi-User (MU) Fine Timing Measurement (FTM) message comprising timing information corresponding to the NDP and timing information corresponding to the plurality of NDP transmissions from the plurality of wireless stations.
2. The apparatus of claim 1 configured to cause the wireless station to process at least one MU NDP comprising two or more NDP transmissions from two or more wireless stations of the plurality of wireless stations.
3. The apparatus of claim 2 , wherein the MU NDP comprises a MU NDP header from the two or more wireless stations, followed by a sequence of two or more channel sounding transmissions from the two or more wireless stations.
4. The apparatus of claim 3 , wherein the resource allocation comprises an allocation of two or more time slots for the two or more channel sounding transmissions.
5. The apparatus of claim 3 , wherein a channel sounding transmission comprises a plurality of channel sounding symbols from a plurality of respective antennas.
6. The apparatus of claim 5 , wherein the channel sounding transmission comprises a short training field prior to the plurality of channel sounding symbols.
7. The apparatus of claim 5 configured to cause the wireless station to process the MU NDP header over a frequency bandwidth, and to process a channel sounding symbol of the plurality of channel sounding symbols over the frequency bandwidth.
8. The apparatus of claim 1 configured to cause the wireless station to process a sequence of a plurality of MU NDPs from a respective plurality of groups of two or more wireless stations.
9. The apparatus of claim 1 configured to cause the wireless station to process a sequence of two or more NDPs comprising two or more respective NDP transmissions of the plurality of NDP transmissions.
10. The apparatus of claim 1 configured to cause the wireless station to:
transmit a positioning trigger message;
process a plurality of FTM requests from the plurality of wireless stations; and
transmit the trigger frame based at least on the plurality of FTM requests, wherein the MU FTM message comprises a MU FTM response.
11. The apparatus of claim 1 , wherein the MU FTM message comprises at least a plurality of Time of Arrival (ToA) values corresponding to the plurality of NDP transmissions from the plurality of wireless stations, and a Time of Departure (ToD) value corresponding to the NDP.
12. The apparatus of claim 1 , wherein the MU FTM message comprises at least channel information corresponding to the plurality of NDP transmissions from the plurality of wireless stations.
13. The apparatus of claim 1 comprising a radio, and one or more antennas.
14. A product comprising one or more tangible computer-readable non-transitory storage media comprising computer-executable instructions operable to, when executed by at least one processor, enable the at least one processor to cause a wireless station to:
transmit a trigger frame comprising a resource allocation of a plurality of resource slots to a plurality of wireless stations;
process a plurality of Non-Data Packet (NDP) transmissions from the plurality of wireless stations according to the resource allocation;
transmit an NDP; and
transmit a Multi-User (MU) Fine Timing Measurement (FTM) message comprising timing information corresponding to the NDP and timing information corresponding to the plurality of NDP transmissions from the plurality of wireless stations.
15. The product of claim 14 , wherein the MU FTM message comprises at least a plurality of Time of Arrival (ToA) values corresponding to the plurality of NDP transmissions from the plurality of wireless stations, and a Time of Departure (ToD) value corresponding to the NDP.
16. An apparatus comprising:
a memory; and
a processor configured to cause a first wireless station to:
process a trigger frame from a second wireless station, the trigger frame comprising a resource allocation of a plurality of resource slots to a plurality of wireless stations comprising the first wireless station;
transmit a Non-Data Packet (NDP) transmission to the second wireless station according to the resource allocation;
process an NDP from the second wireless station; and
process a Multi-User (MU) Fine Timing Measurement (FTM) message from the second wireless station, the MU FTM message comprising timing information corresponding to the NDP and timing information corresponding to the NDP transmission from the first wireless station.
17. The apparatus of claim 16 configured to cause the first wireless station to transmit the NDP transmission as part of a MU NDP.
18. The apparatus of claim 17 configured to cause the first wireless station to transmit the NDP transmission comprising a MU NDP header, followed by a channel sounding transmission from the first wireless station.
19. The apparatus of claim 18 configured to cause the first wireless station to transmit the MU NDP header and the channel sounding transmission over a same frequency bandwidth.
20. The apparatus of claim 16 configured to cause the first wireless station to:
process a positioning trigger message from the second wireless station;
transmit an FTM request to the second wireless station;
process the trigger frame subsequent to transmission of the FTM request; and
process an MU FTM response comprising the MU FTM message.
21. The apparatus of claim 16 , wherein the MU FTM message comprises at least a Time of Arrival (ToA) value corresponding to the NDP transmission from the first wireless station, and a Time of Departure (ToD) value corresponding to the NDP from the second wireless station.
22. The apparatus of claim 16 , wherein the MU FTM message comprises at least channel information corresponding to the NDP transmission from the first wireless station.
23. The apparatus of claim 16 comprising a radio, and one or more antennas.
24. A product comprising one or more tangible computer-readable non-transitory storage media comprising computer-executable instructions operable to, when executed by at least one processor, enable the at least one processor to cause a first wireless station, to:
process a trigger frame from a second wireless station, the trigger frame comprising a resource allocation of a plurality of resource slots to a plurality of wireless stations comprising the first wireless station;
transmit a Non-Data Packet (NDP) transmission to the second wireless station according to the resource allocation;
process an NDP from the second wireless station; and
process a Multi-User (MU) Fine Timing Measurement (FTM) message from the second wireless station, the MU FTM message comprising timing information corresponding to the NDP and timing information corresponding to the NDP transmission from the first wireless station.
25. The product of claim 24 , wherein the MU FTM message comprises at least channel information corresponding to the NDP transmission from the first wireless station.