1. A method for wireless communication at a transmitting network device in a listen-before-talk (LBT) session, comprising:determining multiple input multiple output (MIMO) configuration information for the transmitting network device, wherein the determining comprises determining for the LBT session at least: whether the MIMO configuration information is available; and
if the MIMO configuration information is available, at least one of: a MIMO rank, a number of transmit antennas, a number of receive antennas, a transmit beamforming (TxBF) matrix, or a receive beamforming (RxBF) matrix;
performing a contention-based access protocol procedure to determine whether a wireless transmission channel is clear for transmitting data to a target network device, based on the determined MIMO configuration information, wherein performing the contention-based access protocol procedure comprises adaptive performing of a spatial LBT procedure, based on the MIMO configuration information; and
transmitting a broadcast message, prior to transmitting data to the target network device, the broadcast message including at least part of the MIMO configuration information, when the contention-based access protocol procedure indicates that the wireless transmission channel is clear.