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Method for controlling power level based on packet error rate in wireless personal area network system

  • US 7,400,899 B2
  • Filed: 07/19/2004
  • Issued: 07/15/2008
  • Est. Priority Date: 10/30/2003
  • Status: Expired due to Fees
First Claim
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1. A method for controlling a power level based on a packet error rate (PER) in a wireless personal area network (WPAN) system, the method comprising the steps of:

  • a) at a receiver, computing a PER of a packet in an initial check duration of PER (DP) wherein a transmission power level of the packet is set by a piconet coordinator (PNC);

    b) at the receiver, determining whether the computed PER satisfies a target PER, adjusting a target signal-to-interference ratio (SIR) and requesting a transmitter to adjust the initial transmission power level; and

    c) at the receiver, determining whether the number (N) of successive G is larger than a power control threshold, wherein G denotes DP satisfying the target PER, changing the target SIR based on the determination result whether the number (N) of successive G is larger than the power control threshold, and requesting the transmitter to adjust the possible transmission power level.

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