Protection mechanisms for multi-user MIMO transmissions

摘要

Certain aspects of the present disclosure relate to techniques for medium reservation in the case of multi-user (MU) communications. Multiple mechanisms are supported for protecting MU transmissions, wherein appropriate control messages can be exchanged between an access point and served user stations before transmitting downlink data packets.

主权项

1. An apparatus for wireless communications, comprising:
a circuit configured to:
specify one or more parameters in a management message to ensure that a plurality of confirmation messages transmitted simultaneously on a channel from two or more apparatuses of a plurality of apparatuses in response to a reservation message comprise a same waveform; a transmitter configured to:
transmit the management message, to the plurality of apparatuses, prior to transmitting the reservation message, andtransmit the reservation message to the plurality of apparatus to reserve a medium for data communication; and a receiver configured to:
receive, on the channel, the plurality of confirmation messages, wherein the confirmation messages are of the same waveform, wherein
the transmitter is also configured to transmit data over the medium to the two or more apparatuses in response to the confirmation messages.