Qualification: 
M.E
b_uma@blr.amrita.edu

B. Uma Maheswari currently serves as Assistant Professor at the department of Computer Science, Amrita School of Engineering.She is currently pursuing her Ph.D.

Publications

Publication Type: Journal Article

Year of Publication Title

2019

B. Uma Maheswari and Shetty, T. K. Ramesh, “An Improved Delay Resistant Adaptive Multicasting Strategy for High Definition Video Delivery in Wireless Overlay Network”, Wireless Personal Communications, pp. 1-15, 2019.[Abstract]


The Multimedia based application services have been getting attention in recent years in various fields. These services require a stringent delay resistant protocol in order to provide the best Quality of Service to end users. Existing protocols are predominantly designed using load balancing, tree, multi-tree and mesh based mechanisms. These mechanisms suffer in the presence of channel noise and incur more delay due to improper multicasting techniques adopted. Overlay network using hybrid (tree over mesh) structure along with multicasting strategies are used to address this issue. In this paper, an Improved Delay Resistant Adaptive Multicasting (IDRAM) model which adopts hybrid overlay creation, sub-packet based multi path transmission technique and error correction based on Forward Error Correction along with arbitrary IDRAM-A and selective IDRAM-S multicasting techniques are proposed and evaluated. Simulation is conducted to calculate frame success ratio, throughput, number of packet retransmission and transmission delay. The results obtained prove that IDRAM-S outperforms better than IDRAM-A and existing sub packet based multi path techniques. The number of retransmission requests made by IDRAM-S is reduced compared to the existing model. This reduction in the number of retransmission enables in minimizing end to end delay and thereby achieve stringent delay constraints associated with multimedia data delivery.

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2018

B. Uma Maheswari and Ramesh, T. K., “An Improved Delay-Resistant and Reliable Hybrid Overlay for Peer-to-Peer Video Streaming in Wired and Wireless Networks”, IEEE Access, United States, vol. 6, 1 vol., pp. 56539-56550, 2018.[Abstract]


Live streaming applications become hugely popular in the Internet era. However, these applications place tremendous pressure on video servers. Peer-to-Peer (P2P) communication models are a wise solution to video server pressure due to their scalability and low cost. Many P2P streaming schemes have been proposed and deployed on the Internet. These approaches are mainly based on the tree, mesh, and hybrid overlay structures. However, most overlay structures are proposed for either wired or wireless networks, and their performance was not investigated for both wired and wireless networks. We propose a reputation-based, resilient, delay-resistant hybrid overlay streaming structure called AStream. This hybrid structure aims to multicast videos to peers with the primary goal of delivering video packets before the deadline and maintaining good video quality over both wired and wireless networks. The overlay evolves from tree to a hybrid structure consists of tree and mesh clusters over a period of time. Initially, a tree is constructed using arrival time and location-based approach and is then transformed to a hybrid overlay to reduce delays in video data delivery. Video continuity during peer dynamics is guaranteed by providing multiple parents and auxiliary connections. Simulations are carried out by applying the proposed scheme in both wired and wireless networks. We also investigate the additional delays incurred when the video server is located outside the Wi-Fi network compared to those when the video server is located inside the wireless mesh network. Simulation results show that AStream outperforms the existing overlay structures and delivers faster, better video content with reduced load on the underlying physical network.

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2018

P. Gopalakrishnan and B. Uma Maheswari, “Keyless cryptosystem for secure primitive pairing of mobile devices”, Journal of Computational and Theoretical Nanoscience, vol. 15, pp. 1607-1614, 2018.[Abstract]


Smartphone is a leading mobility platform of the present computing era. Nowadays, transmitting precious information securely between mobile phones is considerably a big challenging task. The mobile devices must get paired in such a manner that effective data exchange should take less time and energy consuming, thus overcoming the fraudulent attacks in the communication channel. The most well known technique of building communication protocols for setting up a secure transfer between such mobile devices is the Cryptographic protocols. To confront security by overcoming the dominance of the invader effectively, Cryptographic techniques are now embedded in wireless environment. Keyless Cryptosystem is one such method which is elaborated as Keyless Key Agreement Cryptography method. This review paper throws a lime light on the overview of Keyless Cryptosystem. Various protocols using this technique are compared and highlighted here. This paper further explains the cryptosystem used in primitive pairing of mobile devices in a secure manner. © 2018 American Scientific Publishers.

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2016

B. Uma Maheswari and Dr. T.S.B. Sudarshan, “Error resilient multipath video delivery on wireless overlay networks”, Telkomnika (Telecommunication Computing Electronics and Control), vol. 14, pp. 894-903, 2016.[Abstract]


Real time applications delivering multimedia data over wireless networks still pose many challenges due to high throughput and stringent delay requirements. Overlay networks with multipath transmission is the promising solution to address the above problems. But in wireless networks the maintenance of overlay networks induce additional overheads affecting the bulky and delay sensitive delivery of multimedia data. To minimize the overheads, this work introduces the Error Compensated Data Distribution Model (ECDD) that aids in reducing end to end delays and overheads arising from packet retransmissions. The ECDD adopts mTreebone algorithm to identify the unstable wireless nodes and construct overlay tree. The overlay tree is further split to support multipath transmissions. A sub packetization mechanism is adopted for multipath video data delivery in the ECDD. A forward error correction mechanism and sub-packet retransmission techniques adopted in ECDD enables to reduce the overhead and end to end delay. The simulation results presented in this paper prove that the ECDD model proposed achieves lower end to end delay and outperforms the existing models in place. Retransmission requests are minimized by about 52.27% and bit errors are reduced by about 23.93% than Sub-Packet based Multipath Load Distribution. © 2016 Universitas Ahmad Dahlan.

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2015

B. Uma Maheswari and Dr. T.S.B. Sudarshan, “Fenwick tree based capability-aware live multimedia streaming in sparse MANETs”, International Journal of Applied Engineering Research, vol. 10, pp. 12655-12670, 2015.[Abstract]


Recent advancement in the network technology and infrastructure support video streaming over multiple paths. Realizing high quality video streaming over Mobile Adhoc Networks (MANET) is a very challenging task. This paper proposes an Application Layer Based Capability Aware protocol for single server multi user live streaming application. In wireless network each device has different capability in terms of data-storage, mobility, forwarding data, availability etc., and proposed protocol aims to realize these capabilities and to distribute video chunks in multiple paths by segmenting the stream based on its capacity. This is achieved with the help of Fenwick Tree – a data structure which is integrated in the Application Layer. The system is implemented and tested under various scenarios. The results show there is a considerable increase in throughput and decrease in total transfer time. © Research India Publications

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2014

S. Saravanan and B. Uma Maheswari, “Analyzing Large Web Log Files in a Hadoop Distributed Cluster Environment”, International Journal of Computer Technology and Applications (IJCTA), vol. 5, no. 5, 2014.[Abstract]


Analysing web log files has become an important task for E-Commerce companies to predict their customer behaviour and to improve their business. Each click in an E-commerce web page creates 100 bytes of data. Large E-Commerce websites like flipkart.com, amazon.in and ebay.in are visited millions of customers simultaneously. As a result, these customers generate petabytes of data in their web log files. As the web log file size is huge we require parallel processing and reliable data storage system for processing the web log files. Both the requirements are provided by Hadoop framework. Hadoop provides Hadoop Distributed File System (HDFS) and MapReduce rogramming model for processing huge dataset efficiently and effectively. In this paper, NASA web log file is analysed and the total number of hits received by each web page in a website, the total number of hits received by a web site in each hour using Hadoop framework is calculated and it is shown that Hadoop framework takes less response time to produce accurate results. Keywords - Hadoop, MapReduce, Log Files, Parallel Processing, Hadoop Distributed File System, ECommerce More »»

Publication Type: Conference Paper

Year of Publication Title

2019

M. K and B. Uma Maheswari, “Adaptive Steering Control and Driver Alert System for Smart Vehicles”, in 3rd International Conference on Computing Methodologies and Communication [ICCMC 2019], Surya Engineering College, Erode , 2019.

2018

P. K. Swetha and B. Uma Maheswari, “An Improved Cluster based Multicasting Technique on Vehicular Adhoc Network”, in 2018 Second International Conference on Green Computing and Internet of Things (ICGCIoT), Bangalore, India, 2018, pp. 263-267.

2018

A. K. N. S. Aishwarya Chandini and B. Uma Maheswari, “Improved Quality Detection Technique for Fruits Using GLCM and MultiClass SVM”, in International Conference on Advances in Computing, Communications and Informatics (ICACCI), Bangalore, 2018.[Abstract]


Intake of healthy fruits and vegetables is vital as they are the source of energy for all living beings. There is an increasing demand for quality in all the consumed food items. Nowadays, starting from consumers, retailers to food manufacturing companies are inspecting food visually for its quality. This manual process incurs more time and it is a laborious and tiring task. So, there is a demand for an automated process which quickly examines, detects the defects and sorts them according to quality. There are many factors such as temperature, humidity etc., affect the quality of fruits. In this work, we have put forward a reliable mechanism for detecting the defects in fruits. The principal goal of this work is to detect and segregate low and best quality fruits. It is achieved using the combination of hardware and image processing techniques and machine learning algorithms. The novelty in this work is interfacing Raspberry Pi with MATLAB and image is captured. The segmentation, feature extraction, and classification is done using MATLAB. Our proposed system exhibits better performance than the existing system.

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2018

B. Uma Maheswari and Ramesh, T. K., “Reliability Enhanced Overlay Structure for Peer-to-Peer Video Streaming”, in International Conference on Intelligent Data Communication Technologies and Internet of Things (ICICI) 2018, Cham, 2018, vol. 26, pp. 1088-1096.[Abstract]


Nowadays, people using live video streaming applications in the Internet are gaining momentum. Client/server model is the simple way to provide video streaming to multiple users. However, this model is not attractive due to server overload/failure and not sharing the client resources. In contrast, Peer to Peer (P2P) approach offers an advantage of creating a self-organizing network. Each byte of data is very important, as these applications demand a high Quality of Service (QoS). Peer failure and/or link failure may cause an interruption in the video delivery. Hence creating a reliable overlay is the primary concern in the streaming system. In this paper, we propose reliability approaches named RA:1, RA:2, RA:3, RA:4, and RA:5 for a hybrid overlay consists of tree and mesh-clusters (MC), where Cluster Heads (CH) are connected to the leaf of the tree. We evaluate and analyze the performance of each approach in the presence of node and link failures and indicate the best among them. RA:5 uses 60.5% more additional connections than RA:1 approach, and it achieves the highest frame success ratio of 99.32%.

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2018

Dr. N. Rakesh, Anjali T., and B. Uma Maheswari, “Implementing MIMO-OFDM for the Improvement of the System Performance in WPAN”, in International conference on Computer Networks and Inventive Communication Technologies (ICCNCT - 2018), Hotel Arcadia, Coimbatore, 2018.[Abstract]


Developing cost-effective solutions to deliver broadband connection to undeserved or under-connected communities using fixed wireless access technology can be achieved by canopy networks. The former can be implemented using MIMO-OFDM technique. The implementations of MIMO-OFDM in systems have shown promising results in terms of system performance improvement. This paper presents high-speed FFT algorithms for wireless personal area network (WPAN) applications which uses high data rate. In WPAN, the FFT/IFFT block plays the major role. To eliminate the huge burden of the computational requirement of the FFT/IFFT process, the divide and conquer algorithm is employed here. This method not only improves the efficiency but is also easy to implement. In this work, the concept of Discrete Fourier Transform is discussed and the same is implemented using MATLAB for the MIMO-OFDM process.

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2017

C. Sravya, B. Uma Maheswari, and Sudarshan, T. S. B., “Cluster based fault tolerant architecture for multicasting data in wireless sensor network”, in Proceedings of the 2017 International Conference On Smart Technology for Smart Nation, SmartTechCon 2017, Bangalore, 2017, pp. 514-517.[Abstract]


The tremendous applications of wireless sensor networks have led the way for its extensive growth and demand. The multicasting applications like streaming data/video is very challenging in wireless sensor network as they should be delivered quickly without any loss. In this paper a fault tolerant multicast routing mechanism for streaming data is proposed to achieve this goal. Sensor nodes are clustered based on location and cluster heads are responsible for delivering data to destinations. A backup cluster head is also provided in each cluster to improve the system resilience. Simulations were conducted in two scenarios one by selecting cluster heads considering node's energy and other by considering node's energy and mobility speed. Simulation results show that the latter approach achieves 11.4% decrease in end to end delay, 17.5% increase in throughput and 14.43% decrease in control overhead than former approach. © 2017 IEEE.

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2017

V. Karanam, B. Uma Maheswari, and Sudarshan, T. S. B., “Overlay based fault tolerant peer to peer multicasting for emergency data communication in VANETS”, in Proceedings of the 2017 International Conference On Smart Technology for Smart Nation, SmartTechCon 2017, Bangalore, 2017, pp. 510-513.[Abstract]


In vehicular ad-hoc networks, vehicles move at a very high speed which makes data communication among vehicles difficult. VANET applications can be classified into safety and non-safety applications. Safety applications mainly focus on reducing the number of accidents and helps in improving the travel efficiency. An accident in heavy traffic roads leads to traffic jam. This information, of an accident happened should be multi-casted to the vehicles nearby, thereby they can change their route plan. So there is a need to multicast the emergency data to nearby vehicles with reduced packet loss and less delay. In this paper, we propose a fault tolerant multicasting technique with one primary parent and a secondary parent. A parent peer located near the accident is responsible for multicasting the data to other moving vehicles. If a parent node fails, the secondary parent starts multicasting the data. Simulation is done in NS-2 with 100 moving vehicles. Simulation results show that packet loss rate is decreased by 64.2%, end-To-end delay is reduced by 31% and control overhead is decreased by 9.91% in the proposed overlay structure than the tree approach. © 2017 IEEE.

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2017

Dr. N. Rakesh, Shakir, M., .Kalamani, P., and B. Uma Maheswari, “An Energy Saving Algorithm Using Heterogeneity Aware Protocol in Wireless Sensor Networks to sustain lifetime of nodes”, in International Conference on Inventive Systems and Control (ICISC 2017),, JCT College of Engineering,Coimbaore , 2017.[Abstract]


With the advancement in sensing technology, applications are moving from wired to wireless region. The main challenge is the energy consumption of individual sensing nodes. When first node dies system becomes unstable and we cannot make use of the untapped node's energy. There comes the relevance of TSEP like protocols in such heterogeneous network. Heterogeneous in the sense with respect to node energy the system becomes unstable. This work analyzes the advantages of TSEP like protocols. When we are manufacturing application for predicting the environmental pollution, natural and ecological disasters, all need to be communicated at present. So energy of sensing node places a crucial factor. The primary source of a sensor node is usually a battery and is usually neglected once it is deployed, which creates routing decision problem and scalability issues. In this work, the data acquisition happens by using a temperature sensor application, the proposed work captures data and it is analyzed using stable election protocol by observing the output performance with respect to lifetime of sensing nodes.

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2016

B. Uma Maheswari and Sudarshan, T. S. B., “Reputation based mesh-tree-mesh cluster hybrid architecture for P2P live streaming”, in 2016 3rd International Conference on Devices, Circuits and Systems (ICDCS), Coimbatore, India, 2016.[Abstract]


Streaming video content to the end users with less delay and at the same time delivering content without compromising on the quality is a challenging task in peer to peer network. In this paper, a novel algorithm for constructing a scalable and robust hybrid overlay structure for video streaming is proposed. Peers are arranged in three layers namely mesh, tree and mesh cluster. They are connected to any of the layers on the basis of its reputation; the peers have reputation above a certain threshold are connected in meshor tree structure otherwise connected to mesh cluster. It supports more number of peers by connecting high reputed peers near streaming server and robustness of the proposed overlay structure to peer churn is achieved by the usage of mesh structure. Simulation results exhibit the characteristics of the proposed three-layer hybrid video streaming architecture and its performance with respect to end to end delay. It takes 19.41% less delay than mTreebone to stream video.

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2015

B. Uma Maheswari and Dr. T.S.B. Sudarshan, “An ECDD technique to optimize QoS in wireless overlay network for multipath video streaming”, in Proceedings of the 2015 International Conference on Applied and Theoretical Computing and Communication Technology, iCATccT 2015, 2015, pp. 50-53.[Abstract]


Multimedia applications over wireless networks are growing day by day. To provide better user experience the use of overlay network is the promising solution. However, maintaining overlay in wireless network is the challenging task which produces additional overheads. This overhead degrades the quality of the video transmitted over overlay networks. To overcome these issues ECDD model is proposed in this paper. mTreebone is used to build an overlay This model also adopts FEC scheme for error correction and video data is transmitted by using sub packetization method in multiple paths. The simulation results show the improved performance of the algorithm with respect to end to end delay and retransmission requests. Number of retransmission requests is reduced by 52.27% than SPMLD. © 2015 IEEE.

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2014

Dr. N. Rakesh, B. Uma Maheswari, and Srivatsa, S. K., “Performance Analysis of Propagation Models in Different Terrain Conditions for IEEE Standard 802.16e WiMAX”, in 2014 International Conference on Communication and Signal Processing, Adhiparasakthi Engineering College, Melmaruvathur, Tamilnadu, Bengaluru, 2014.[Abstract]


To fulfill the end-users demand for access to the Internet “anywhere-anytime” and ensure quality of service, is the WiMAX (Worldwide Interoperability for Microwave Access) technology standardized based on IEEE 802.16 that provides efficient packet radio interface enabling transmission of high data rates. WiMAX network became popular and receives growing acceptance as a Broadband Wireless Access (BWA) system which is the solution of “last mile” wireless broadband. WiMAX has potential success and is gaining hike all over the world for deployment of the network in its line-of-sight (LOS) and non-line-of-sight (NLOS) conditions for both fixed operation below 11GHz and Mobile operation below 6 GHz frequency range. In the first step of cell planning and deployment of wireless network, estimation of path loss is very important in turn to get better signal strength to access Internet. In this work, we have used well-structured propagation models for analysis and comparison at different terrain areas, the models are - COST231 Hata model, COST231 Walfisch-Ikegami model, ECC-33 model, Ericsson model, and SUI model for SIMO (Single-input Multiple-output) channels. Using environmental parameters and some correction factors path loss is calculated for all terrain (urban, suburban, and rural) conditions. This provides guidelines for cell planning of mobile WiMAX at cellular frequency between 2-6 GHz.

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2009

S. B. Arumugam, B. Uma Maheswari, and Rajamani, D. Kumar, “Challenges in using Watershedding in Segmentation of Medical images”, in National Conference on Advanced Image Processing and Networking (NACIPAN ’09) , National Engineering College at Kovilpatti, 2009.

2009

B. Uma Maheswari, B. Arumugam, S., and Rajamani, D. Kumar, “Image Segmentation of Brain using Iterative Watershedding plus Ridge Detection”, in Recent Trends in Information & Communication Technology conference, Bannari Amman Institute of Technology at Sathyamangalam, 2009.