Methods, architectures, apparatuses and systems for near-field uplink multiple input multiple output

Abstract

Procedures, methods, architectures, apparatuses, systems, devices, and computer program products for near-field uplink multiple input multiple output. A wireless transmit-receive unit (WTRU) may determine one or more angles of reception of one or more reference signals (RS) transmitted by a network node in direction of the WTRU. In reply, the WTRU may transmit an indicated subset of sounding reference signals (SRS) in the direction of the network node antenna array using a corresponding set of uplink transmission beams that correspond to a beam separation. The network node may determine if the beam separation that the WTRU used was proper. Hence, the WTRU may receive an indication from the network to change, the beam separation. Based on the beam separation indication, the WTRU may change the uplink transmission beams in order to increase or decrease the beam separation, for a subsequent transmission of a subsequently indicated subset of SRS.

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