Dynamic adjustment of idle mode sleep time by received power outage probability

OpenAlex · İngilizce

The proper adjustment of sleep time in idle mode (a.k.a. DRX-Discontinuous Reception in 3GPP specifications) is critical for mobile device (MD) operation in cellular wireless systems. The dynamic radio environment due to transmission impairments and mobility renders this requirement a nontrivial challenge. Moreover, this issue is aggravated in heterogeneous wireless networks where MDs have to change their camping cell more often. Hence, sleep time in idle mode is supposed to be calibrated to perform timely cell reselection without having the received power fall below a suitable level. In this work, we elaborate on MD sleep time adjustment and determine outage bound for imminent received power under certain assumptions. Moreover, we devise a configurable sleep/wake algorithm that aims to choose the best sleep time without dropping below a predefined received power level. Finally, we evaluate our approach with respect to baseline counterparts to examine the performance and investigate the trade-off between received power quality and average power consumption.