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Method, apparatus and system of packet transmission

  • US 7,489,650 B2
  • Filed: 03/29/2004
  • Issued: 02/10/2009
  • Est. Priority Date: 03/29/2004
  • Status: Expired due to Fees
First Claim
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1. A method for protecting packet transmissions by a multi-mode wireless communication station operating in a wireless network, the multi-mode wireless communication station configurable to transmit using either orthogonal frequency division multiplexed (OFDM) modulation or direct sequence spread spectrum/complementary code keying (DSSS/CCK) modulation, the method comprising:

  • collecting information to identify a legacy communication station currently operating in the network;

    estimating a first time period (TCTS) to successfully transmit a data packet using the OFDM modulation with request-to-send/clear-to-send (RTS/CTS) protection, estimating a second time period (TRTS) to successfully transmit the data packet using the OFDM modulation with CTS-to-self protection, and estimating a third time period (TCCK) to successfully transmit the packet using the DSSS/CCK modulation without protection; and

    selecting the modulation and protection having the shortest of the time period for transmitting the data packet when a legacy communication station has been identified.

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