Physical Layer Convergence Protocol (PLCP)

• Used to indicate data rates and packet length

• Transmitted at 1 Mbps (long preamble) or at 2 Mbps (short preamble)

• Fields of PLCP

  • Signal rate (1 byte)
    • Which of the four speeds to be used
  • Service field (1 byte)
    • Reserved for future use
  • Length field (2 bytes)
    • Length of the payload in 8-bit bytes
  • Header error check field (2 bytes)
    • CRC-16 (if any error found, packet is discarded)

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