ARIHANT TECHNO SOLUTIONS

OMNET IEEE PROJECTS - 2016-2017

ATS_OMN16_001 - A Study on Suitable Range of Packetization Interval for Streaming Application over WLAN

Ensuring satisfactory Quality of Service (QoS) is a vital consideration in deploying multimedia streaming service, especially when deploying over wireless network. Selecting suitable parametric values for each streaming parameter is one of a crucial factor. This work is concerned with one of the parameters commonly known as `Packetization Interval' which has direct influences on several critical QoS parameters such as packet loss, packet delay and jitters. The experiment on finding a suitable range of packetization interval had been carried out by means of simulation using INET Framework for OMNeT++. The simulations were carried out based on the basic service set scenario in both no interference and coexistence with background traffics. The result reveals that the commonly recommended default packetization interval of 20 ms. fails to yield satisfactory QoS in many scenarios. The study also indicates that a suitable packetization interval for scenarios under this study or similar ones ought to be set within the range of 40 ms-70 ms. The paper also discusses the findings and applications are suggested.

ATS_OMN16_002 - Multi-agent and Reinforcement Learning Based Code Offloading in Mobile Fog

Fog computing, which performs on network edges, is a front-end distributed computing archetype of centralized cloud computing. Mobile Fog is a special purpose computing prototype, which leverages the mobile computing to deliver seamless and latency-aware mobile services. Offloading computation in mobile Fog is challenging because of the spatiotemporal resource requirements of heterogeneous mobile devices. In this paper, we propose reinforcement learning based code offloading mechanism to ensure low-latency service delivery towards mobile service consumers. We use the distributed reinforcement learning algorithm to offload basic blocks in a decentralized fashion to deploy mobile codes on geographically distributed mobile Fogs. We simulate the proposed prototype using OMNeT++ considering fluctuated resources of mobile Fog and varied service demands of mobile users. The proposed method significantly reduces the execution time and latency of accessing mobile services while ensuring lower energy consumption of mobile devices.

ATS_OMN16_003 - Cyber–Physical Modeling of Distributed Resources for Distribution System Operations

Cosimulation platforms are necessary to study the interactions of complex systems integrated in future smart grids. The Virtual Grid Integration Laboratory (VirGIL) is a modular cosimulation platform designed to study interactions between demand-response (DR) strategies, building comfort, communication networks, and power system operation. This paper presents the coupling of power systems, buildings, communications, and control under a master algorithm. There are two objectives: first, to use a modular architecture for VirGIL, based on the functional mockup interface (FMI), where several different modules can be added, exchanged, and tested; and second, to use a commercial power system simulation platform, familiar to power system operators, such as DIgSILENT PowerFactory. This will help reduce the barriers to the industry for adopting such platforms, investigate and subsequently deploy DR strategies in their daily operation. VirGIL further introduces the integration of the quantized state system (QSS) methods for simulation in this cosimulation platform. Results on how these systems interact using a real network and consumption data are also presented.

ATS_OMN16_004 - New Solution For The Creation Of MANETs Based On Personal Devices

Mobile ad hoc networks (MANETs) enable communication between moving nodes through multi-hop wireless routes. There are protocols with special features that handle both auto-configuration and routing in these networks. Nevertheless, many of these auto-configuration protocols have not been truly implemented and in consequence, only exist a few available solutions for MANETs conformation. This article presents a new solution for this issue, mainly in cases where only personal devices are available. The core of the proposal is a new auto-configuration protocol, which allows dynamic allocation of unique IP addresses and accomplishes effective answers in front of issues like mergers and partitions of networks, and others. Finally, the results of simulations in OMNET++ and of tests of a pilot version based on Android mobile phones are shown.

ATS_OMN16_005 - Integrated Wireless Communication System Using MANET for Remote Pastoral Areas of Tibet

To reduce the network deployment cost and provide voice, message and low rate data services in remote pastoral areas of Tibet effectively, an integrated wireless communication system utilizing MANET (Mobile Ad hoc Network) is proposed. The sparse mobile devices, assisted with the solar-powered multi-functional standing stations mainly on networking maintenance and routing arrangement, self-organize into a MANET. The topology of the standing stations is designed for networking robust and to simplify the routing method and energy strategy. Then in the OMNeT++ (Objective Modular Network Test bed in C++) simulation, the energy consumption is analysis while adjusting routing with the different energy status of the standing stations. The result shows that the standing stations should adjust routing as well as control the mobile devices' activity level according to the energy states of the standing stations and their adjacent mobile devices.

ATS_OMN16_006 - TCast: A Transitional Region Aware Broadcast Protocol in Variable Wireless Link Qualities 

As Internet-of-Things (IoT) and its applications are increasingly popular, where diverse multi-scale sensors and devices are seamlessly blended for ubiquitous communication infrastructure, broadcast operation still plays an essential role in scalable information dissemination to enhance information accessibility and availability. A unit-disk signal propagation model has been implicitly assumed and extensively applied to prior broadcast protocols, but we need to relax this assumption in reality. In this paper, we propose a transitional region aware broadcast protocol, called TCast, in variable wireless link qualities due to the signal propagation effects and non-uniform radiation pattern from the omni-directional antenna. The TCast is a stateless protocol and consists of two major operations, forwarder search and probabilistic rebroadcast. A sender neither maintains any neighbor information nor searches for a set of forwarders, but broadcasts a set of Beacon packets followed by a single Data packet. The sender repeatedly conducts the broadcast operations depending on the number of rebroadcasted packets overheard. Each receiver independently makes its own rebroadcast decision based on the number of received Beacon packets. A network-level random backoff mechanism is also proposed to avoid any packet contentions and collisions. The transitional region and its corresponding probability of packet reception are further investigated through a simple mathematical analysis. Extensive simulation experiments are also conducted using the OMNeT++, and simulation results indicate that the TCast shows competitive and scalable performance and is deployable in time-varying packet reception rates at receivers.

ATS_OMN16_007 - Combining OpenFabrics Software and Simulation Tools for Modeling InfiniBand-based Interconnection Networks

The design of interconnection networks is becoming extremely important for High-Performance Computing (HPC) systems in the Exascale Era. Design decisions like the selection of the network topology, routing algorithm, fault tolerance and/or congestion control are crucial for the network performance. Besides, the interconnection network designers are also focused on creating middleware layers compatible to different network technologies, which make it possible for these technologies to interoperate. One example is the OpenFabrics Software (OFS) used in HPC for breakthrough applications that require high efficiency computing, wire-speed messaging, microsecond latencies and fast I/O for storage and file systems. OFS is compatible with several HPC interconnect technologies, like InfiniBand, iWarp or RoCE. One challenge in the design of new features for improving the interconnection network performance is to model in specific simulation tools the latency introduced by the OFS modules into the network traffic. In this paper, we present a work-in-progress methodology to combine the OFS middleware with OMNeT++-based simulation tools, so that we can use some of the OFS modules, like OpenSM or ibsim, combined with simulation tools. We also propose a set of tools for analyzing the properties of different network topologies. Future work will consist on modeling other OFS modules functionality in network simulators.

ATS_OMN16_008 - Simulating Search Protocols in Large-Scale Dynamic Networks

Reproducing complex networks with features of real-life networks is exciting and challenging at the same time. Based on the popular Omnet++ discrete event simulator, we introduce Armonia, a framework for modeling massive networks and their dynamic interactions. It includes a collection of topology generators, a set of resource placement and replication modules, a component for specifying resource location strategies, while also offering support for exporting data in order to visualize or analyze with other appropriate tools. Our framework targets search protocols in large-scale dynamic networks. Here, we apply it to simulate various probabilistic flooding strategies, making a comparative study of their performance over different network topologies.

ATS_OMN16_009 - A Variable Speed Limit (VSL) based Model for Advanced Traffic Management through VANETs 

Roads and automobiles have become increasingly important in our day to day lives. To make the roads safer and to enhance the road traffic safety, various technologies have been converged which have become key components of Intelligent Transportation Systems (ITS) network. One of such Technology is "Vehicular Ad hoc Networks" (VANETs) which is a variant of "Mobile Ad hoc Networks" (MANETs) in which automobiles act as mobile nodes and are capable of communicating with one another and hence create a mobile network with a wide range. This paper discusses how to enhance Road Safety and Traffic Management using Variable Speed Limit (VSL) through VANETs. The paper also discusses the limitation of existing system primarily used in India and presents features of VSL systems to overcome the problems faced due to traditional systems. Validation of the paper is done using SUMO Simulator and tools like OMNet++ and Veins.

ATS_OMN16_010 - Analyzing the Energy (Dis-)Proportionality of Scalable Interconnection Networks

Power consumption is one of the most important aspects regarding design and operation of large computing systems, such as High-Performance Computing (HPC) and cloud installations. Various hard constraints exist due to technical, economic and ecological reasons. We will show that interconnection networks contribute substantially to power consumption, even though their peak power rating is low compared to other components. Moreover, networks are still not energy-proportional, opposed to other components such as processors. In fact, network links consume the same amount of energy whether they are in use or not. In this work, we analyze the potential of power savings in high-performance direct interconnection networks. First, by analyzing the power consumption of today's network switches we find that network links contribute most to a switch's power, but they behave differently than other components like processors regarding possible power saving. We extend a OMNeT++ based interconnection network simulator with link power models to asses power savings. Our early experiments, based on traces of the NAMD and Graph500 applications show an immense potential for power saving, as we observe long inactivity periods. However, in order to design effective power saving strategies it is necessary to come to a detailed understanding of different hardware parameters. The transition time, which is the time required to reconfigure a link, could be crucial for most strategies. We see our OMNeT++ based, energy-aware simulator as a first step towards a deeper knowledge regarding such constraints.