Patent ID: 7570921
Filing Date: 2009-08-04
Classification: H04B,H04L,H04W

Abstract:
1. A method for enabling wireless communication comprising: receiving at a first communication device a first request-to-send (RTS) signal transmitted by a second communication device, wherein the first RTS signal requests reservation of a radio communication medium for transmission of a signal from the second communication device to the first communication device; at the first communication device, generating a first clear-to-send (CTS) signal including information to inform communication devices of an impending transmission on the radio communication medium; transmitting the first CTS signal from the first communication device with antenna processing parameters so as to cause a null at the second communication device but not at a plurality of other communication devices; generating a CTS timeout, executing a back-off and sending a second RTS signal using composite beamforming (CBF); receiving a second RTS signal transmitted by the second communication device using CBF after a CTS timeout; transmitting a second CTS signal to the second communication device in response to the second RTS using CBF; receiving data fragments transmitted by the second communication device using CBF; and transmitting an acknowledgement (ACK) to the second communication device using CBF.