US 12,250,053 B2
Methods and apparatus for MIMO transmission
Oghenekome Oteri, San Diego, CA (US); Alphan Sahin, Westbury, NY (US); Hanqing Lou, Syosset, NY (US); Li-Hsiang Sun, San Diego, CA (US); and Rui Yang, Greenlawn, NY (US)
Assigned to InterDigital Patent Holdings, Inc., Wilmington, DE (US)
Filed by InterDigital Patent Holdings, Inc., Wilmington, DE (US)
Filed on Aug. 15, 2023, as Appl. No. 18/234,150.
Application 18/234,150 is a continuation of application No. 17/828,984, filed on May 31, 2022, abandoned.
Application 17/828,984 is a continuation of application No. 16/621,133, granted, now 11,349,546, previously published as PCT/US2018/037510, filed on Jun. 14, 2018.
Claims priority of provisional application 62/567,348, filed on Oct. 3, 2017.
Claims priority of provisional application 62/557,573, filed on Sep. 12, 2017.
Claims priority of provisional application 62/519,808, filed on Jun. 14, 2017.
Prior Publication US 2023/0388000 A1, Nov. 30, 2023
Int. Cl. H04B 7/06 (2006.01); H04B 7/0452 (2017.01); H04W 74/08 (2024.01); H04W 74/0816 (2024.01); H04W 84/12 (2009.01)
CPC H04B 7/0695 (2013.01) [H04B 7/0452 (2013.01); H04B 7/0617 (2013.01); H04B 7/0628 (2013.01); H04W 74/0816 (2013.01); H04W 84/12 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A station (STA), the STA comprising:
a processor and a transceiver having a plurality of radio frequency (RF) chains in communication with the processor, the processor and transceiver configured to:
sense radio frequency energy on a channel intended for a multiple input multiple output (MIMO) transmission using one or more of the plurality of RF chains, to determine whether the channel is busy or not busy; and
at a time and using at least one RF chain where the channel is sensed not busy, send a frame comprising a directional multi-gigabit (DMG) clear-to-send (CTS) to self, indicating timing information of the MIMO transmission; and
send the MIMO transmission using the indicated timing information and the at least one RF chain where the channel is sensed not busy.