Conference Papers
Permanent URI for this collectionhttps://idr.nitk.ac.in/handle/123456789/28506
Browse
17 results
Search Results
Item Experimental analysis of RSSI-based distance estimation for wireless sensor networks(Institute of Electrical and Electronics Engineers Inc., 2016) Mahapatra, R.K.; Shet, N.S.V.Research in Wireless Sensor Networks (WSNs) has revealed the location information of the sensor nodes seems to be the critical and the most important aspect, for the applications like environment monitoring, object tracking, health care etc. Estimation accuracy is needed in these kind of applications. In general, Signal strength decreases with the increase in distance. Hence the correlation that exists between the RSSI (Received Signal Strength Indication) value and distance is the key parameter for the ranging and localization of WSNs. This paper presents a model based on RSSI, which provides the distance estimation between sensor nodes in WSNs. Analysis of the model and performance evaluation is done in a real system, deployed in indoor environment using IRIS mote. Results of these evaluation would help to achieve accuracy in location estimation of WSNs. © 2016 IEEE.Item Analysis of series-fed microstrip array antennas(Presses Polytechniques Et Universitaires Romandes, 2016) Faisalbin Abdulmajeed, N.; Shet, N.S.V.; Rao, P.H.Series-fed array of square patches designed at 10 GHz, with three different configurations has been analyzed for sidelobe level and cross-polarization characteristics. A series-fed 8×2 planar array is analyzed to provide a sidelobe level of - 24.2dB and cross-polarization level of -21.8dB. The second configuration; a 2-line series array of 8 elements oriented back to back and fed with 180° out of phase exhibits a sidelobe level of - 25dB and low cross-polarization better than -51.6dB over all the angles. In the third configuration, a single line series array of 8 elements displaced on both the sides of the feed line is analyzed. The sidelobe level has been increased to -13.3dB with maximum cross-polarization level -27.7dB. The impedance bandwidth of 220MHz, 270MHz and 350MHz for a VSWR of 2, is observed for the three antenna types respectively. © 2016 IEEE.Item Energy aware routing protocol for resource constrained wireless sensor networks(Association for Computing Machinery acmhelp@acm.org, 2016) Prasad, S.; Jaiswal, S.; Shet, N.S.V.; Sarwesh, P.Wireless sensor network (WSN) is a developing technology that improves the resource utilization in various fields such as home automation, e-health, smart grid, precision agriculture etc. It consists of sensor devices, which works autonomously with its sensing, communication and computation capabilities. In most of the sensor network applications the nodes will be deployed in remote areas (land slide monitoring, wildlife monitoring etc.), so replacing the battery often is impossible in many WSN scenarios. Hence energy is considered as a valuable resource in resource constrained wireless sensor networks. In this paper, we propose a new routing methodology to improve the energy efficiency in resource constrained WSN. The proposed technique uses SNR (Signal to Noise Ratio), node degree and residual energy as routing parameters, to find an energy efficient and reliable path for data transmission. The combination of the parameters used in the proposed routing technique is done based on weighted sum approach. The proposed framework has been implemented on and compared with a number of standard energy efficient protocols and our results show considerable improvement in comparison to the existing techniques. © 2016 ACM.Item An index coded approach for reducing number of broadcasts in vehicular networks(Institute of Electrical and Electronics Engineers Inc., 2017) Patil, A.; Shekar, N.; Shet, N.S.V.Vehicular network standard demands a short range reliable vehicle-to-vehicle (V2V) communication with high mobility, also increasing amount of downloaded data in short encounters. Satisfying demands of clients with minimum number of transmissions using index coding has proven notable significance in wireless ad-hoc networks. The proper encoding at the server with side information leads to simultaneous satisfaction of clients with reduced amount of broadcasts. MERLIN (Maximum Expected download over Random LINks) is one of the fundamental protocols developed for optimizing downloads in vehicular networks over random encounter durations [1]. In this paper, we present I-MERLIN (Index coding based MERLIN) protocol and analyze its performance over MERLIN. We show that same amount of data can be downloaded from server in reduced number of transmissions, for single server multiple clients scenario. We also show that, I-MERLIN works well to satisfy multiple clients in minimum number of requests, which can be applicable for real road scenarios. © 2017 IEEE.Item Clustering and cooperative data transfer in VANETs using index coding(Inderscience Publishers, 2018) Patil, A.; Shet, N.S.V.Along with the prime aim of providing on-road safety, vehicular ad hoc networks have enabled the infotainment applications due to increasing demands from various travellers. The high mobility of nodes demands fast and efficient broadcasting of data. In this paper, we use index coding with clustering and cooperative downloading to satisfy various demands of travelling vehicles in reduced number of transmissions. The proposed index coding based protocol achieves better download throughput through V2V data exchange between clusters. Simulation results show that the proposed design achieves higher throughput than previously defined IEEE 1609.4 and Vehicular Enhanced Multichannel MAC (VEMMAC) protocols by reducing the total number of transmissions at the server. © © 2018 Inderscience Enterprises Ltd.Item Challenges for Decentralized Congestion Control Mechanisms in Vehicular Ad Hoc Networks(Institute of Electrical and Electronics Engineers Inc., 2018) Patil, A.; Shet, N.S.V.Vehicular Ad Hoc Networking (VANET) is an emerging technology defined with main motive of avoiding on road accidents and provide safety and life critical applications to users in a well-organized manner. We present current challenges in designing VANET protocols through extensive survey from the perspective of decentralized congestion control (DCC) strategies. The challenges in routing and security applications are also outlined briefly. Internet of things (IoT) will be the future networking system in which all things will be connected to interact. In the near future, VANETs will be the main part of IoT networks because of its safety and infotainment applications. A lot of work is done in this area, still, the industry thrusts for more efficient and robust design. This paper highlights various research challenges, which will help other researchers who wish to work in this area. © 2018 IEEE.Item Transmit Data Rate Control Based Decentralized Congestion Control Mechanism for VANETs(Institute of Electrical and Electronics Engineers Inc., 2019) Patil, A.; Deeksha, M.; Shekar, N.; Shet, N.S.V.; Kulkarni, M.Vehicular Ad Hoc Networking (VANET)technology is becoming prominent in this era. It is defined to improve on-road conditions and provide safety and different entertainment applications to end users in orderly and efficient manner. The idea of making everything connected in Internet of things (IoT)has evolved as a promising networking system and VANETs are one of the components of it. In this paper, we present a multistate active transmit data rate control based decentralized congestion control mechanism. The real world scenario generated from SUMO is considered for simulation. Simulation results show that, data rate control mechanism performs better over transmit power control and without adaptation mechanisms. © 2019 IEEE.Item Data Processing and deploying missing data algorithms to handle missing data in real time data of storage tank: A Cyber Physical Perspective(Institute of Electrical and Electronics Engineers Inc., 2019) Abhishek, M.B.; Shet, N.S.V.Water forecasting is crucial for planning, designing the infrastructure, and also for operating and managing water supply systems. Forecasting in the computation unit plays a very significant role in Cyber-Physical System. Real-time monitoring of water flow rates information helps us to conserve water when it is needed the most. Hence, we summarize in this paper the first impediment in forecasting which is; handling missing data in the real-time monitoring system using the different imputation techniques such as k-Nearest Neighbor, Expectation-Maximization, Matrix Completion. The performance of the respective method is evaluated using traditional methods like Root Mean Square Error (RMSE), Mean Absolute Error (MAE) and Mean Absolute Percentage Error (MAPE). Missingness simply refers to the manner in which a demographic sample lacks data. The two types of missingness considered here are: 'missing at random' and 'missing at burst'. Using the different imputation methods, the validation is performed by computing for a range of 'missingness' varying from 0% to 60%. In our experiment setup, we synthetically omitted missing values continuously and randomly in the datasets for the rationale of imputing omitted values in the datasets. In this work, we are choosing the best-fitted model for our application. © 2019 IEEE.Item Biometric-Based Authentication in Online Banking(Springer Science and Business Media Deutschland GmbH, 2023) Hublikar, S.; Pattanashetty, V.B.; Mane, V.; Pillai, P.S.; Lakkannavar, M.; Shet, N.S.V.The use of technology has become the integral part of human life. Most importantly the introduction of Internet has made the lives of people easy and due to its cost effectiveness; usage of Internet by people has been increased. The Internet has made the people to move toward the online mode of transaction. Banks recommend their customers to use Internet banking facility and assure it as a safest mode of transaction but it is associated with huge risk. The continuous rise in online banking brings several security issues and increased cost of implementing higher security systems for banks and customers. Present online banking technology works on 2-Factor authentication mode, i.e., it works on both transaction level and authentication level. The main problem associated with 2-Factor authentication is that there may be risk associated, like cyberattack (SIM swapping fraud), etc., so we have proposed a biometric authentication technique which makes transaction more secure. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.Item Analysis of Modulation schemes Using Rayleigh and AWGN channel for wireless sensor nodes in Internet of Things(Institute of Electrical and Electronics Engineers Inc., 2023) Mahapatra, R.K.; Shet, N.S.V.; Satapathi, G.S.; Patro, B.S.; Satapathy, D.Constraints of energy in a wireless sensor network has become a critical issue as almost all the nodes are battery driven. Hence energy is limited. Hence optimization of energy is a critical factor for the sensor node's lifetime. Here we have considered the asymmetric method of communication that uses different modulation schemes with error correcting codes for up-link and down-link communication. We evaluate and compare two extensively used error correcting codes, Hamming and Reed-Solomon (RS) codes, together with well-known modulation schemes, including QAM, M-FSK, M-PSK, and BPSK. This paper makes use of the relation between Signal to noise ratio (SNR) and bits per symbol towards modelling and analysis purposes. © 2023 IEEE.