name: PL
full_form: Path Loss
context: The Protection Level (PL) is a real-time upper bound on the positioning error at the required degree of confidence, where the degree of confidence is determined by the TIR probability. The PL is defined as follows: Protection Level: The PL is a statistical upper-bound of the Positioning Error (PE) that ensures that, the probability per unit of time of the true error being greater than the AL and the PL being less than or equal to the AL, for longer than the TTA, is less than the required TIR, i.e., the PL satisfies the following inequality: Prob per unit of time [((PE> AL) & (PL<=AL)) for longer than TTA] < required TIR NOTE: When the PL bounds the positioning error in the horizontal plane or on the vertical axis then it is called Horizontal Protection Level (HPL) or Vertical Protection Level (VPL) respectively. NOTE: A specific equation for the PL is not specified as this is implementation-defined. For the PL to be considered valid, it must simply satisfy the inequality above. The PL
description: Path Loss (PL) is a statistical upper-bound of the Positioning Error (PE). It ensures a certain level of confidence in positioning accuracy by defining the probability per unit of time that the true error exceeds the Alert Limit (AL), while the PL remains less than or equal to the AL for longer than the Time-To-Alert (TTA). This probability should be less than the required Target Integrity Risk (TIR).
explanation: Path Loss is defined as a statistical measure directly related to positioning accuracy. It quantifies the risk of error exceeding a certain threshold, making it a crucial parameter for network performance and reliability.
section_title: 9.1.1.3Integrity protection level (PL)
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