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Table 2 Notations.

From: QoS-Guaranteed Power Control Mechanism Based on the Frame Utilization for Femtocells

Symbol

Semantics

Transmitting power of the FAPs

ΔP

Power adaptation step

Minimal transmitting power of the FAPs

Maximal transmitting power of the FAPs

Minimal CINR when the UE is still able to connect to the FAPs

CINR when the data between the FAPs and the UE are sent with the highest MCS

Current frame utilization

Target frame utilization

The set of UEs' average CINR of the FAPs ,

The set of UEs' transmission efficiencies of the FAPs m,

Power adaptation interval

Fade margin to cope with fading effects