Improving NS-2 Network Simulator to Evaluate IEEE 802.15.4 Wireless Networks Under Error Conditions

2014 ◽  
Keyword(s):  
Wireless Networks ◽  
Ieee 802.15.4 ◽  
Network Simulator

scholarly journals Voice Quality Estimation in Wireless Networks

2015 ◽  
Vol 63 (6) ◽  
pp. 2179-2185
Author(s):  
Petr Zach ◽  
Martin Pokorný ◽  
Jiří Balej
Keyword(s):  
Wireless Networks ◽  
Computer Network ◽  
Voice Quality ◽  
Research Area ◽  
Network Simulator ◽  
Quality Estimation ◽  
Voice Service ◽  
Voice Data ◽  
The Impact

This article deals with the impact of Wireless (Wi-Fi) networks on the perceived quality of voice services. The Quality of Service (QoS) metrics must be monitored in the computer network during the voice data transmission to ensure proper voice service quality the end-user has paid for, especially in the wireless networks. In addition to the QoS, research area called Quality of Experience (QoE) provides metrics and methods for quality evaluation from the end-user’s perspective. This article focuses on a QoE estimation of Voice over IP (VoIP) calls in the wireless networks using network simulator. Results contribute to voice quality estimation based on characteristics of the wireless network and location of a wireless client.

scholarly journals Heterogeneous wireless networks with mobile devices of multiple interfaces for simultaneous connections using Fuzzy System

PLoS ONE ◽  
2021 ◽  
Vol 16 (2) ◽  
pp. e0247142
Author(s):  
Jorge Amaro de Sarges Cardoso ◽  
Fabio Pereira Ferreira da Silva ◽  
Tássio Costa de Carvalho ◽  
José Jailton Henrique Ferreira ◽  
Nandamudi Lankalapalli Vijaykumar ◽  
...  
Keyword(s):  
Wireless Networks ◽  
Fuzzy System ◽  
Heterogeneous Wireless Networks ◽  
Academic Community ◽  
Network Simulator ◽  
Multiple Interfaces ◽  
Exponential Increase ◽  
And Performance ◽  
Dual Interface

With the exponential increase in heterogeneous wireless networks today, there has been a growing interest from the academic community for issues related to handover problems. The main objective of this paper is to evaluate the quality of service and performance of a device with a dual interface that connects simultaneously to two heterogeneous networks with no competition in the exchange of packets between them. It is a proposal to solve the mitigation of handover impacts. The tool used for evaluation was the Network Simulator 2. The results showed a better use of the band in comparison to the scenario using a traditional mobile device.

scholarly journals Implementation of envelope detection based Wake-Up Receiver for IEEE 802.15.4 WPAN from off-the-shelf components

2017 ◽  
Vol 15 ◽  
pp. 107-113 ◽  
Author(s):  
Josua Arndt ◽  
Lukas Krystofiak ◽  
Vahid Bonehi ◽  
Ralf Wunderlich ◽  
Stefan Heinen
Keyword(s):  
Wireless Networks ◽  
Power Consumption ◽  
System Design ◽  
Data Transmission ◽  
Ieee 802.15.4 ◽  
Low Latency ◽  
Area Network ◽  
Envelope Detection ◽  
Idle Listening ◽  
Personal Area Network

Abstract. Power consumption in wireless networks is crucial. In most scenarios the transmission time is short compared to the idle listening time for data transmission, the most power is consumed by the receiver. In low latency systems there is a need for low power wake-up receivers (WuRx) that reduce the power consumption when the node is idle, but keep it responsive. This work presents a WuRx designed out of commercial components to investigate the needs of a WuRx when it is embedded in a Wireless Personal Area Network (WPAN) system in a real environment setup including WLAN and LTE communication and considering interferer rejection. The calculation necessary for the attenuation of those interferers is explained in detail. Furthermore, a system design is presented that fulfills the requirements for this environment and is build from off-the-shelf components.

scholarly journals Análisis del desempeño de una red Ad-Hoc inalámbrica móvil MANET, empleando el software NS 2.32 bajo el estándar IEEE 802.15

MASKAY ◽  
2011 ◽  
Vol 1 (1) ◽  
pp. 10 ◽  
Author(s):  
Johanna Gavidia ◽  
Román Lara ◽  
Gonzalo Olmedo
Keyword(s):  
Ad Hoc ◽  
Ieee 802.15.4 ◽  
Network Simulator ◽  
Ieee 802.15

En este artículo se realiza el análisis de una Red Ad-Hoc MANET Móvil bajo el estándar IEEE 802.15.4 utilizando Network Simulator 2.32 (NS) en función del Throughput y el Tiempo Medio parametrizados por el número de nodos para una frecuencia de 2,4 GHz y una tasa de transmisión de 250 kbps. En el canal es usado el modelo de propagación de dos rayos.

scholarly journals Avaliação de Desempenho de Redes-em-Chip Sem Fio Single-Hop com NAS Parallel Benchmarks

2013 ◽  
Author(s):  
Amanda Maria P. Amorim ◽  
Henrique C. Freitas
Keyword(s):  
Wireless Networks ◽  
Wide Band ◽  
Ultra Wide Band ◽  
Network Simulator ◽  
Networks On Chip ◽  
On Chip ◽  
Many Core

Em arquiteturas tradicionais de redes-em-chip, há influência do fio que pode reduzir a escalabilidade, rendimento e eficiência. Redes-em-chip sem fio (Wireless Networks-on-Chip WiNoCs) são alternativas para fornecer comunicação entre núcleos de processadores many-core com alta largura de banda e baixo consumo de energia. Em aplicações paralelas há comunicações entre vários núcleos demandando um projeto de rede-em-chip eficiente. Portanto, o objetivo deste trabalho é projetar e avaliar uma arquitetura WiNoC single-hop usando cargas de trabalho paralelas. A metodologia é baseada em simulações através do simulador de rede NS-2 (Network Simulator) e aplicações do NAS Parallel Benchmarks (NPB). A arquitetura WiNoC é baseada na topologia mesh 2-D com tecnologia de rádio UWB (Ultra Wide Band). A transmissão entre núcleos é avaliada com base nas comunicações unicast (1:1 e N: 1) e broadcast (1: N e N: N). A arquitetura WiNoC Single-hop tem alto desempenho nas comunicação broadcast, alcançando no máximo 2,21 % de perda de pacotes. Nas comunicações unicast, a WiNoC single-hop tem alto desempenho atingindo no máximo 0,02 % de perda de pacotes e 0,2 ms de latência. A maior taxa de perda de pacotes e latência ocorrem nas comunicações N:1, devido a concorrência dos pacotes pelo nó destino. A WiNoC Single-hop alcançou até 63,12 J de consumo de energia. É possível concluir que a arquitetura WiNoC Single-hop apresenta alto desempenho, mas precisa de melhorias para reduzir o consumo de energia aumentando a sua eficiência.

Simulation of Vertical Handoff Algorithms for Heterogeneous Wireless Networks

2012 ◽  
pp. 62-84
Author(s):  
Alexander Garcia D. ◽  
Andres Navarro C. ◽  
Adriana Arteaga A. ◽  
Fabio G. Guerrero ◽  
Enrique Stevens-Navarro
Keyword(s):  
Computer Simulation ◽  
Wireless Networks ◽  
Programming Languages ◽  
Communication Networks ◽  
Heterogeneous Wireless Networks ◽  
General Purpose ◽  
Vertical Handoff ◽  
Network Simulator ◽  
First Case

Computer simulation is an important tool for the study and analysis of communication networks. In the case of simulation of Vertical Handoff Algorithms (VHAs) for heterogeneous wireless networks there are two approaches: using a network simulator or using general purpose programming languages. The objective of this chapter is to present and compare both approaches, by means of two study cases. The first case considers the use of network simulator NCTUns (National Chiao Tung University Network Simulator), while the second case considers the use of MATLAB.

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