US Patent No. 10,512,047

ACCESS POINT (AP), STATION (STA) AND METHOD OF MULTI-USER (MU) LOCATION MEASURMENT


Patent No. 10,512,047
Issue Date December 17, 2019
Title Access Point (ap), Station (sta) And Method Of Multi-user (mu) Location Measurment
Inventorship Jonathan Segev, Tel Mond (IL)
Yaron Alpert, Hod Hasharoni (IL)
Chittabrata Ghosh, Fremont, CA (US)
Assaf Kasher, Haifa (IL)
Assignee Intel IP Corporation, Santa Clara, CA (US)

Claim of US Patent No. 10,512,047

1. An apparatus of an access point (AP), the apparatus comprising: memory; and processing circuitry, configured to:contend for a transmission opportunity (TXOP) to obtain access to a channel;
encode a first trigger frame (TF), to determine which of a plurality of stations (STAs) request to participate in a multi-user (MU) ranging, the first TF indicating orthogonal frequency division multiple access (OFDMA) resource units (RUs) for the plurality of STAs to transmit service requests;
configure the AP to transmit the first TF;
decode service requests for the MU ranging from two or more STAs of the plurality of STAs, wherein the decoding is in accordance with the OFDMA RUs;
encode, for transmission during the TXOP, a second TF to indicate that the two or more STAs are to transmit uplink sounding frames in accordance with first multi-user (MU) multiple-input multiple-output (MIMO) (MU-MIMO) RUs, wherein the second TF is a TF for Location (TFL), and wherein the second TF includes a TF type parameter that indicates a TF type from a group of candidate TF types that includes at least the TFL;
configure the AP to transmit the second TF;
decode the uplink sounding frames in accordance with the first MU-MIMO RUs;
encode, for transmission during the TXOP, downlink sounding frames to the two or more STAs
configure the AP to transmit the downlink sounding frames and
encode, for transmission during the TXOP, downlink location measurement reports (LMRs) to the two or more STAs, wherein a corresponding downlink LMR of the downlink LMRs comprises a reception time when a corresponding uplink sounding frame of the uplink sounding frames is received at the AP and a transmission time when a corresponding downlink sounding frame of the downlink sounding frames is transmitted.