International Journal of Communications

E-ISSN: 1998-4480
Volume 14, 2020

Notice: As of 2014 and for the forthcoming years, the publication frequency/periodicity of NAUN Journals is adapted to the 'continuously updated' model. What this means is that instead of being separated into issues, new papers will be added on a continuous basis, allowing a more regular flow and shorter publication times. The papers will appear in reverse order, therefore the most recent one will be on top.

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Volume 14, 2020

Title of the Paper: On Location-based Services Build on the Close Patial Position of Mobile Devices


Authors: Dmitry Namiot

Pages: 47-51

Abstract: This article focuses on architectural models of location-based services. The paper discusses the model of spatial network proximity, within which the classical architecture of services using location information, based on the use of geo-coordinates data provided by users, is replaced by some distributed cyber-physical system. Within the network proximity model, geo-computation is replaced by the direct proximity definitions. And this very proximity measurement is based on determining the availability (visibility) of the signals of the wireless network nodes. This article discusses how to build new service models using location information.

Title of the Paper: Connection setup and traffic aggregation in IP-based Elastic Optical Networks (EON)


Authors: Wajdi Halabi

Pages: 42-46

Abstract: To overcome the challenges of the increased IP traffic volume on the Internet, the IP/MPLS-based fixed grid DWDM network structure was proposed, which makes the interaction between both the IP layer and the optical wavelength routed fixed DWDM layer applicable. However, the deployment of this architecture was not only expensive, but power-consuming. The emerging optical Flexgrid networks technology is nowadays suggested to be the potential candidate for future optical transport networks. This is because it provides extremely flexible and spectrally effective resources utilisation. Therefore, it has attracted the attention of network operators, optical networks equipment manufacturers and the wider research and development society. In this research work, we propose a novel multilayer routing scheme for an IP/MPLS-based optical Flex-grid network, which is based on the protocol suite defined by the GMPLS architecture. Furthermore, we evaluate its behaviour in an online dynamic traffic scenario.

Title of the Paper: Optimization of 5G Accessibility in Non Standalone and Standalone Mode


Authors: Adel Bouzid Belguidoum, Mohamed Lamine Tounsi, Slimane Mekaoui

Pages: 36-41

Abstract: In this paper, we have analyzed and developed different types of algorithms related to 5G accessibility procedures for Non Standalone (NSA) and Standalone (SA) mode. The 5G accessibility depends on 5G radio parameters of each procedure, such as contention based Random access (CBRA), contention free random access (CFRA), Radio admission control (RAC), Radio resource control (RRC) and Radio bearer reconfiguration. The random access procedure for NSA is similar to SA mode. The goal is to improve the accessibility by optimizing timers and tune the main 5G radio parameters related to Random access channel (RACH), RRC reconfiguration and RAC procedures.

Title of the Paper: Design and Analysis of High Beam forming MIMO Antenna for 5G Applications


Authors: Aylapogu Pramod Kumar, N.Suman, Y.V. Koteswararao

Pages: 29-35

Abstract: in upcoming days wireless communication products and electronic gadgets are becoming a necessity to human life. Communication systems need antennas that work with multiband and wide band with required parameters like polarization and gain. The main motto of this work is to produce high beam forming with the aid of mutual coupling among the four antenna elements in order to encourage enhanced transit capacity and empower the communication bandwidths at very large data rates for 5G Technology. In the view of mitigating the multipath fading with above mentioned principles. The designed antenna is developed a MIMO patch antenna with wide characteristics. It operates the frequency band from 2.2 GHz to 4.8 GHz. The antenna is developed with FR4 material with a dielectric consistent of 4.4, loss tangent of 0.02 and a density of 1.6mm. The recommended design has 4 monopole antennas. Each monopole antenna has a circular patch with radius of 5mm to avoiding interference. The simulation results s- parameter, VSWR, TARC, ECC, CCL and diversity gain are obtained and verified with the aid of Ansys HFSS and CST studio

Title of the Paper: Analysis of Cognitive Radio Spectrum Sensing Techniques over Nakagami-m Fading Channel


Authors: Mohammad Shahnawaz Shaikh, P. K. Khare

Pages: 24-28

Abstract: As the demand of wireless communication increases exponentially, with the same ratio scarcity of spectrum also originates. To overcome this spectrum scarcity a novel approach, Cognitive Radio (CR) shows development of an opportunistic and promising technology. This paper explores implementation and analysis of the CR spectrum sensing techniques such as Matched filtering, Energy detection and Cyclostationary feature detection on MATLAB platform by simulation. We analyze performance of these techniques over, Nakagami-m fading channel with AWGN channel for both the BPSK and QPSK modulation.

Title of the Paper: Toward an Improved Hybrid Model for Simulatingcontinuous Flow Microwave Heating of Water


Authors: G. Cuccurullo, L. Giordano, G. Viccione

Pages: 16-23

Abstract: This paper introduces an improved hybrid(numerical-analytical) model for simulating microwave (MW)heating of laminar duct flow. The proposed procedure linksnumerical results to analytical calculations, providing a tool foraccurate prediction of the bulk temperature distribution in arelatively reduced computation time, enhancing the design ofMW heating of continuous flow water systems. The hybridsolution was obtained by first numerically solving the Maxwellequations in correspondence of an average dielectricpermittivity; discrete values of the cross-section averaged heatgeneration arising from the numerical solution were firstcorrected by a suitable weighting function and then interpolatedby a function resulting from the discrete Fourier series. Themomentum and the energy equations fed by the above calculatedheat generation distribution were uncoupled from Maxwellequations. The problem being linear, the analytical thermalsolution was sought as the sum of two partial solutions, each oneaffected by a single non-homogeneity. The former solution turnedout to be the classical Graetz problem, while the second one,driven by the heat generation, was solved in closed form by thevariation of parameters method. On the other hand, the sameproblem was solved by a complete numerical approach in orderto have a reference solution; thus, the Maxwell equations and theenergy balance for the flowing fluid were simultaneously solvedconsidering temperature dependent dielectric permittivity. Fullydeveloped velocity, thermally developing conditions and no phasetransition during the heating process were assumed for both thehybrid and the numerical solution. The availability of thereference solution allowed to prove the substantial enhancementof the hybrid solution in describing the bulk temperaturedistribution along the pipe when compared to the one related tothe classical constant properties approach. Results, presentedand discussed for different inlet velocities, show that increasingvelocities provide a better agreement due to the smoothing effectrealized by higher frequencies fluctuations in heat generationdistribution felt by the flowing fluid.

Title of the Paper: Horn Antennas Loaded with Metamaterial for Satellite band Application


Authors: Mohamed Lashab, C. Zebiri, F. Benabdelaziz

Pages: 12-15

Abstract: Split Ring Resonator (SRR) as Metamaterial hasbeen loaded on pyramidal horn antennas for Ku band or satelliteapplication. The aim of this work is to exhibit the advantage ofmetamaterial (SRR) use inside horn antenna; this is mainlyenhancement of the bandwidth towards lower frequency andimprovement of the radiation pattern gain. The horn antenna isfeed by a monopole antenna of optimised length. The obtainedresults from HFSS simulation concerning the constitutiveparameters of the (SRR), show that there is a DNG (DoubleNegative) permeability and permittivity in the frequency ofinterest. In this work the operating bandwidth of the proposedantenna (notched band) is in the range of 9.80 GHz to 10.30 GHz,and 10.80 GHz to 11.20 GHz as Ku or satellite application

Title of the Paper: Contemporary Perception Of Task Scheduling Techniques In Cloud: A Review


Authors: Samah Alshathri

Pages: 7-11

Abstract: Typically, the constant changes in computers and communications technology led to the need of on-demand network access to a shared computing resources to reduce cost and time and this is known as Cloud computing, which delivers computing services to users as a pay-as-you-go manner by emerging several distributed and high performance computing concepts. The cloud makes reaching any information or source possible from anywhere eliminating the setup and instillation step such that the user and the hardware may co-exist in different places. This comes beneficial for the users or the small companies that cannot effort to pay for the hardware, storage or resources as the big companies. Many of the studies on cloud computing was dedicated to the performance efficiency of task scheduling. Scheduling is a wide concept and it is one of the most important issues that generally work on mapping tasks to appropriate resources efficiently and effectively using one or more strategy. This paper have reviewed and classified the most recent scheduling algorithms in cloud computing and gave examples on each.

Title of the Paper: Mathematical Modeling of Optimal Node Deployment for Indoor Wireless Sensor Networks


Authors: Lial Raja Missif, Mohammad M. Kadhum

Pages: 1-6

Abstract: Wireless Sensor Network (WSN) has been utilized in environmental monitoring where large number of connected sensor nodes collaboratively sense and report conditions of the monitoring area. Indoor event sensing and tracking is one of WSN applications that has a significant effect on saving cost economically and humanitarianly. Efficient sensor node deployment can ensure coverage, connectivity, and stability of the network. This paper presents the mathematical modeling of a node deployment for indoor wireless sensor networks where the optimal number of nodes required to satisfy the coverage of the indoor area and network connectivity requirements is determined. The proposed solution contributes to the reduction in the cost and maintenance of the network as less number of sensors is needed, compared to the traditional grid node deployment.