Patent Document ID: 7826798
Application ID: 12109002
Patent Flag: 1

Claim One:
1. A method of transmitting information between first and second wireless stations, the method comprising: performing a training phase including an exchange of medium reservation messages between the first and second stations to reserve a medium and to select at least one data transmission parameter, at least one of the medium reservation messages including a duration field indicating a duration of the medium reservation; performing a first data phase including sending data from the first station to the second station according to the transmission parameter selected during the training phase, wherein the selected transmission parameter is selected on a per-antenna basis, where multiple antennas are used at said the second station; performing a second data phase without first repeating the training phase, the second data phase comprising: transmitting a protection portion from a first station to the second station, the protection portion including a duration field indicating the duration of the reserved medium; and transmitting data from the first station to a second station according to the at least one transmission parameter.