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Improving the performance of a wireless CSMA-based MAC communication system using a spatially selective antenna

  • US 7,522,552 B2
  • Filed: 11/09/2004
  • Issued: 04/21/2009
  • Est. Priority Date: 11/10/2003
  • Status: Active Grant
First Claim
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1. A device to be used in a wireless communication system with CSMA-based MAC, comprising:

  • means for transmitting at least a first and second Request-to-Send (RTS) messages and at least a first and second data packets on a transmission medium, anda spatially selective antenna,wherein said second RTS message is transmitted after said first RTS message and before said transmission of said first data packet is finished, wherein said at least first and second data packet are transmitted on said transmission medium at least partially in parallel, and wherein said device uses said spatially selective antenna to direct a transmission null towards a first station for the transmission of said second RTS message, to direct a transmission peak towards said first station for the transmission of said first data packet, and to direct a transmission peak towards a second station for the transmission of said second data packet.

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