| 主权项 |
1. A method for communicating in a wireless local area network, the method comprising:
receiving, at a receiving station, a multi-user physical layer protocol data unit (MU-PPDU) over an operating bandwidth, the MU-PPDU including a signal-A field, a signal-B field, and a data portion; wherein the signal-A field comprises bandwidth information, the bandwidth information indicating the operating bandwidth over which the MU-PPDU was received; wherein the data portion comprises at least one aggregated-medium access control (MAC) protocol data units (A-MPDU); wherein the signal-B field comprising information identifying a first sub-channel carrying the at least one A-MPDU for the receiving station; wherein
the signal-A field is phase-rotated over at least one first subcarrier group, each first subcarrier group having bandwidth of 20 MHz within the operating bandwidth, andthe signal-B field is phase rotated over a plurality of second subcarrier groups, each second subcarrier group having bandwidth that is less than 20 MHz within the operating bandwidth; determining a type of block acknowledgement requested, the block acknowledgement indicating a successful receipt of the at least one A-MPDU by the receiving station; transmitting, if a first type of acknowledgement is requested, a block acknowledgement over a second sub-channel, the second sub-channel assigned to the receiving station; and transmitting, if a second type of acknowledgement is requested, a block acknowledgement over the operating bandwidth. |
