ARIHANT TECHNO SOLUTIONS

NS3 IEEE PROJECTS - 2016-2017

ATS_16NS3_001 - Analytical Model and Performance evaluation of Long Term Evolution for vehicle Safety Services

In traffic jam or dense vehicle environment, vehicular ad-hoc networks (VANET) can’t meet safety requirement due to serious packet collision. The traditional cellular network solves packet collision, but suffers from long end-to-end delay. 3GPP Long Term Evolution (LTE) overcomes both drawbacks, thus it may be used instead of VANET in some extreme environments. We use Markov models with the dynamic scheduling and semipersistent scheduling (SPS) to evaluate how many idle resources of LTE can be provided for safety services and how safety applications impact on LTE traditional users. Based on the analysis, we propose to reserve the idle radio resources in LTE for vehicular safety services (LTE-V). Additionally, we propose the weighted-fair-queueing (WFQ) algorithm to schedule beacons for safety services using LTE reserved resource. Numerical results verify that the proposed mechanism can significantly improve the reliability of safety application by borrowing limited LTE bandwidth. We also build NS3 simulation platform to verify the effectiveness of the proposed Markov models. Finally, the reliability of applications including cooperation collision warning, slow vehicle indication and rear-end collision warning using DSRC with LTE-V are evaluated. The simulation results demonstrate that the stringent QoS requirement of the above three applications can be satisfied even under heavy traffic.

ATS_16NS3_002 - Using MPTCP subflow association control for heterogeneous wireless network optimization

Multipath TCP (MPTCP) was designed to increase the throughput and reliability of TCP, with specific motivation coming from scenarios including data center and cloud computing. The use of MPTCP has been recently explored to support heterogeneous wireless networks (HetNets) involving hosts that have multiple network interfaces. However, current solutions generally involve many simplifying assumptions. In this paper, we propose a new framework to collect scheduling information from various scheduling network entities and conduct optimization from a global view. The framework uses the existing or readily accessible MPTCP parameters. Under this framework, we introduce a centralized optimization algorithm to realize general proportional fairness of user throughput. Based on results from NS3 simulations, we provide evidence that the approach provides a low cost solution for improved performance from the perspectives of both applications and network operators.

ATS_16NS3_003 - Simulation Model and Comparison for Satellite Links in Ku and Ka Bands for Standards-based on DVB-S2 and NS3

This work generates a simulation model to understand the effects of attenuation in broadcasting satellite links like for data links and especially to determine the feasibility of using a high performance satellite backhaul for new generation data networks, faced with different scenarios especially in areas where rainfall attenuates and degrades the RF satellite links. Predictive models have been assembled delivered by the ITU and its recommendations for rain attenuation and the links are integrated with DVB-S2 and NS3 standards, where the simulated model will be obtained which with a position geographical coordinates as a reference of the remote station VSAT, will result in operating modes, signal strength and availability of the satellite link given. This certainly makes it a tool to study and design that many papers omitted on the research part and it becomes necessary to be applied in new models of propagation and attenuation in regions where it is desired to conduct the study, achieving thus a greater precision in the quality of links and a more encouraging panorama to deploy networking data systems high reliability and high transmission rates based on next generation 4G and future 5G networks.

ATS_16NS3_004 - HDEER: A Distributed Routing Scheme for Energy-Efficient Networking

The proliferation of new online Internet services has substantially increased the energy consumption in wired networks, which has become a critical issue for Internet service providers. In this paper, we target the network-wide energy-saving problem by leveraging speed scaling as the energy-saving strategy. We propose a distributed routing scheme-HDEER-to improve network energy efficiency in a distributed manner without significantly compromising traffic delay. HDEER is a two-stage routing scheme where a simple distributed multipath finding algorithm is firstly performed to guarantee loop-free routing, and then a distributed routing algorithm is executed for energy-efficient routing in each node among the multiple loop-free paths. We conduct extensive experiments on the NS3 simulator and simulations with real network topologies in different scales under different traffic scenarios. Experiment results show that HDEER can reduce network energy consumption with a fair tradeoff between network energy consumption and traffic delay.

ATS_16NS3_005 - Explore and Analyze the Performance Factors on Wi-Fi Sensing Starvation Problems

Wi-Fi wireless communication has become a basic service in public areas. But the quality is not stable due to the factors that are influenced by 1) a limited number of channels results in access interference, 2) various transmission ranges, carrier sensing and hidden terminal starvation problems, and 3) the barriers reduce the quality of transmissions. This work aims to explore and analyze the factors to show the level of performance effect on various transmission ranges of access points. Accordingly, this study designs several simulation cases to evaluate whether a small cell size can provide high performance co-existing with a large cell size by controlling the effect of the sensing ranges, transmission ranges, traffic types, data rates, and packet sizes. Network Simulation 3 (NS3) tool is used to implement the simulation cases and compare the results. We discussed our findings on these factors that affect the levels of starvation caused by the various signal ranges.

ATS_16NS3_006 - AUV-aided communication method for underwater mobile sensor network

Underwater Wireless Sensor Networks (UWSNs) are getting growing interest because of wide-range applications. However, the underwater acoustic communication technology is constrained by the nodes' continuous movement, limited communication bandwidth and node energy, which bring great challenges to UWSNs. In order to handle these challenges and to achieve an efficient energy consumption, many researches have been carried. A significant problem in Underwater Wireless Sensor Networks (UWSNs) is the difficulty of energy limit. This paper proposes an AUV-aided acoustic communication protocol, namely AA-RP (AUV-Aided Routing Method Integrated Path Planning), which integrates the AUV's dynamic path planning algorithms into the routing protocol. This integrated communication method relies on two phases: AAR (AUV-Aided Network Routing) and RAPP (Routing Aided Path Planning). AA-RP utilizes the cooperation of multi-tasks to reduce energy consumption for network and avoids hot spot and zone problem with a dynamic GN (Gateway Node) schemes. In order to evaluate the performance of the proposed method, we make the simulation with NS3, which contains a UAN (Underwater Acoustic Network) module. The simulation results show that the method can reduce the network energy consumption with a good delivery ratio.

ATS_16NS3_007 - Multi-channel routing protocol for dynamic WSN

Effective strategies are required to ensure efficient data collection for wireless sensor networks deployed in harsh environment, and where propagation conditions are unstable. In this paper, we propose a scheduled based routing protocol that use both topological and link quality information to adapt to environment changes. The multiples channels is used to enable parallel transmissions and hence allow fast data gathering at the sink while reducing collisions. Our protocol is using a duty cycling technique to save energy. NS3 simulation results show that our protocol is adapting well to change in the topology and maintains almost similar traffic flows as in stable conditions of functioning.

ATS_16NS3_008 - Increasing network lifetime by energy-efficient routing scheme for OLSR protocol

One of the main considerations in designing routing protocols for Mobile Ad-Hoc Network (MANET) is to increase network lifetime by minimizing nodes' energy consumption, since nodes are typically battery powered. Many proposals have been addressed to this problem; however, few papers consider a proactive protocol like Optimized Link State Routing Protocol (OLSR) to better manage the energy consumption. Some of them have explored modifications to the MPRs selection mechanism, whereas others have investigated multiple cross layer parameters to increase the network lifetime. In this paper, we explored both modification to MPR selection and integrating appropriate routing metrics in the routing decision scheme to lessen effects of reason that lead to more energy consumption. Our power-aware version of OLSR is proven by simulations in NS3 under a range of different mobile scenarios. Significant performance gains of 20% are obtained in network lifetime for our modified OLSR and little to no performance gains in term of Packet Delivery Ratio (PDR).