Burst OFDMA Supporting MU-MIMO

摘要

Methods and apparatus are provided for burst OFDMA support MU-MIMO in the WLAN network. In one novel aspect, pluralities of user channels are configured for a downlink wideband channel, wherein each user channel is associated with a user group selecting from a SU-SISO, or a SU-MIMO or a MU-MIMO. In one embodiment, the SIG1 and SIG2 signaling fields are independent for each user channel. In another embodiment, the SIG1 fields are duplicates for all user channels carrying common information. The SIG2 fields for each user group are different from each other carrying user group specific information. In another novel aspect, an uplink OFDMA frames contains ACK packets from multiple STAs concurrently using an uplink wideband channel. In one embodiment, one ACK packet is sent for a MU-MIMO user group. In another embodiment, the uplink ACK packet assignment is based on indications in the downlink PHY SIG field.

主权项

1. A method, comprising:
configuring a first number of downlink narrow bands for a downlink orthogonal frequency division multiple access (OFDMA) wideband channel by a wireless communication station in a wireless network; configuring a second number of downlink user channels, wherein each downlink user channel includes one or more configured downlink narrow bands, and wherein each user channel is associated with a corresponding transmitting (TX) user group with one or more wireless stations (STAs); generating downlink signaling fields for each user channel, wherein the signal fields include at least a SIG1 and a SIG2; and transmitting concurrently downlink data frames to multiple STAs connected to the wireless communications station using the downlink OFDMA wideband channel, wherein each of the multiple STAs belongs to one of the user groups.