US 12,342,376 B2
Sharing of TXOP based on spatial multiplexing
Dennis Sundman, Sollentuna (SE); Leif Wilhelmsson, Lund (SE); Miguel Lopez, Solna (SE); and Charlie Pettersson, Solna (SE)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 17/908,944
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Mar. 5, 2021, PCT No. PCT/EP2021/055608
§ 371(c)(1), (2) Date Sep. 2, 2022,
PCT Pub. No. WO2021/176062, PCT Pub. Date Sep. 10, 2021.
Claims priority of provisional application 62/987,170, filed on Mar. 9, 2020.
Claims priority of provisional application 62/986,486, filed on Mar. 6, 2020.
Prior Publication US 2023/0107240 A1, Apr. 6, 2023
Int. Cl. H04W 74/08 (2024.01); H04B 7/06 (2006.01); H04W 74/0816 (2024.01)
CPC H04W 74/0816 (2013.01) [H04B 7/0697 (2013.01)] 26 Claims
OG exemplary drawing
 
1. A method of controlling wireless transmissions in a wireless communication system, the method comprising:
an access point of the wireless communication system configuring a carrier for communication with one or more wireless devices associated with the access point;
the access point contending for access to the carrier;
in response to winning contention for access to the carrier, the access point reserving a transmission opportunity on the carrier;
the access point cooperating with one or more other access points of the wireless communication system by sharing the transmission opportunity based on spatial multiplexing of wireless transmissions on the carrier;
in a spatial channel sounding phase of the shared transmission opportunity, the access point sending sounding signals and receiving sounding reports from one or more wireless devices associated with the access points sharing the transmission opportunity, wherein the sounding reports are received in multicast transmissions which are receivable by multiple access points sharing the transmission opportunity; and
based on the received sounding reports, the access point determining a precoding matrix for spatially multiplexed wireless transmissions to at least one of the one or more wireless devices associated with the access point.