Reliability of prognostics and health management systems (PHM) relies upon accurate understanding of critical components’ degradation process to predict the remaining useful life (RUL). Traditionally, degradation process is represented in the form of data or expert models. Such models require extensive experimentation and verification that are not always feasible. Another approach that builds u...

We consider the joint subchannel allocation and power control problem for OFDMA femtocell networks in this paper. Specifically, we are interested in the fair resource sharing solution for users in each femtocell that maximizes the total minimum spectral efficiency of all femtocells subject to protection constraints for the prioritized macro users. Toward this end, we present the mathematical fo...

The heterogeneity in cellular networks that comprise multiple base stations’ types imposes new challenges in network planning and deployment of future generation of cellular networks. The Radio Resource Management (RRM) techniques, such as dynamic sharing of the available resources and advanced user association strategies, determine the overall network capacity and efficiency. This paper evalua...

The generation of ultrastrong attosecond pulses through laser-plasma interactions offers the opportunity to surpass the intensity of any known laboratory radiation source, giving rise to new experimental possibilities, such as quantum electrodynamical tests and matter probing at extremely short scales. Here we demonstrate that a laser irradiated plasma surface can act as an efficient converter ...

Handoff algorithm decides the connection to user with system while minimizing latency and no. of handoff needed. In this paper the RSS based handoff decision algothim is proposed. This algorithm results in multiply the values of RSS by some constant which obtained from a target femto base station and which is connected to macro cell. The value of the constant α varies with distance increase fro...

BMBF, 05K16BCA, Verbundprojekt 05K2016 - Femto-THz-X: Controlling Ultrafast Phase Transitions by Selective Excitations of Phonons, Magnons and Polaritons (Teilprojekt 1)

Deploying Femtocells inside a macrocell network can significantly increase the macrocell capacity in terms of network optimisation. However, the deployment of femtocells within a macrocell coverage area causes severe femto-femto interferences, which may have an impact on the overall performance of femtocells. Avoiding such interference is very important for co-existence of femtocells. In this p...