In this paper, we investigate the coverage performance and energy efficiency of multi-tier heterogeneous cellular networks (HetNets) which are composed of macrocells and different types of small cells, i.e., picocells and femtocells. By virtue of stochastic geometry tools, we model the multi-tier HetNets based on a Poisson point process (PPP) and analyze the Signal to Interference Ratio (SIR) v...

While mobile ad-hoc networking (MANET) research has received a considerable attention in recent years, the majority of them have focused on single-tier (e.g., ground) and homogeneous (e.g., same radio for every node) MANET. Few have investigated the potential implications of multi-tier and heterogeneous natures of MANET on the design and performance of MANET protocols in a systematic manner. Fo...

Vision research has been shaped by the seminal insight that we can understand the higher-tier visual cortex from the perspective of multiple functional pathways with different goals. In this paper, we try to give a computational account of the functional organization of this system by reasoning from the perspective of multi-task deep neural networks. Machine learning has shown that tasks become...

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...

Two vital challenges arise in the next generation 5G networks: scarcity of spectrum and the aspect of energy efficiency (EE). In this letter, we first formulate the prime issue, i.e., energy harvesting (EV) for 5G wireless networks, in which spectrum and energy resources are efficiently received and resourcefully managed. Thereafter, we introduce a medium access control (MAC) scheme for dual ti...

This paper introduces a new kind of Java-server, the Smart Data Server (SDS). It offers the accessing of data with function-calls to SDS-networks. This allows the building of lean clients with the shifting of functionality to the SDS-network. The server builds the middle-tier in a multi-tier architecture (Client SDS-Network Database). It offers a frame for easy-to-build environment-independent ...

In this paper, we will introduce a new kind of server, called the Smart Data Server (SDS). It acts as the middle-tier in a three-tier architecture (Applet-SDS-Database). It allows the building of lean clients by shifting functionality to the SDS. It offers a frame for easy-to-build environment-independent modules with multiple functionality. By building of SDS-networks, secure communication is ...

The idea of femtocell have attracted lots of interest from the research community of wireless communication. Femtocells aim to increase the capacity and coverage area of the current cellular network by helping to reduce its actual cell size. However, new design challenges arise by randomly deploying the femtocells over the cellular network, hence a heterogeneous network. One of the main problem...