In this article we investigate the side effects of DTX (Discontinuous Transmission) on the performance of a WCDMA radio interface with SIR-based closed-loop power control. The aim of DTX is to reduce the energy consumption of the mobile terminal and the total interfering power in a cellular system; here, it is shown that this technique can also lead to a temporary performance degradation when the interfering terminals turn on their data channel after some frames of inactivity. The main parameters that characterize the dynamics of the DTX mechanism are described and their effects are investigated. We also propose a suitable variation to the DTX mechanism which reduces the unwanted effects.
Effects of discontinuous transmission on the performance of a WCDMA cellular system
PERILLO, Roberto;TRALLI, Velio;ZORZI, Michele
2002
Abstract
In this article we investigate the side effects of DTX (Discontinuous Transmission) on the performance of a WCDMA radio interface with SIR-based closed-loop power control. The aim of DTX is to reduce the energy consumption of the mobile terminal and the total interfering power in a cellular system; here, it is shown that this technique can also lead to a temporary performance degradation when the interfering terminals turn on their data channel after some frames of inactivity. The main parameters that characterize the dynamics of the DTX mechanism are described and their effects are investigated. We also propose a suitable variation to the DTX mechanism which reduces the unwanted effects.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
