M. Pushpalatha ¹, Revathi Venkataraman ¹, K. Sornalakshmi ¹

Affiliations
1 SRM University, Kattankulathur, Chennai - 603203, Tamil Nadu, IN

Abstract

Objectives: Wireless Sensor Network (WSN) is a collection of sensor nodes which have limited resources like storage and power. To make the network energy efficient, data fusion becomes essential for reducing the number of transmissions. In this paper, we have implemented a data aggregated collection tree protocol (DA-CTP), an enhanced Collection Tree Protocol (CTP) and we compare its performance with the traditional CTP. Methods/Statistical Analysis: For every set of source nodes, the node at the next level will act as an aggregator to accept the packets from source nodes. The function of the aggregator is twofold. If the data packets sent by the source nodes are redundant, the average will be computed on the received data packets and sent to the destination, besides the received data packets will be merged to a single packet. Thereby minimizing the number of packet transmissions. Findings: Our experimental analysis shows that the DA-CTP consumes less energy than traditional CTP without any performance degradation. Application/Improvements: Betweenness Centrality concept can be introduced to minimize the latency.

Keywords

CTP (Collection Tree Protocol), Data Aggregation, TelosB Motes, Wireless Sensor Networks.

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C. Jothikumar ¹, Revathi Venkataraman ¹

Affiliations
1 Computer Science and Engineering, SRM University, Chennai - 603203, Tamil Nadu, IN

Abstract

Objectives: To minimize the energy utilized for transmitting and receiving the data in wireless sensor network. The goal is to find out the best routing protocol to increase the network lifespan. This paper dealt with the detailed review of hierarchical routing protocol of wireless sensor network and compared depends on few characteristics. Methods: Minimum spanning tree approach for finding the shortest path in the network to reach the sink. Energy Optimization is an important key used to increase the lifespan of the node. A different classification approach is introduced on routing the message based on the number of hops the packets takes to reach the destination. Findings: The transmission energy was a major factor in draining the sensor node. To minimize the transmission energy, we suggest a novel approach by varying the transmission power based on the distance from the node to the cluster head. Improvements: The survey will help to develop an adaptive routing protocol suitable for real-time application. Achieving the energy efficient routing protocol will have a downfall with the delay.

Keywords

Clustering based Routing, Data Aggregation, Energy Efficiency, Wireless Sensor Networks.

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G. Abirami ¹, Revathi Venkataraman ¹

Affiliations
1 Department of Computer Science and Engineering, SRM University, Kattankulathur − 603203, Kancheepuram District, Chennai, Tamil Nadu, IN

Abstract

Background: Access control is the method of granting permissions according to policies. Mobile devices, such as Smartphone, are acting as multi-purpose devices for private as well as the corporate environment. Since the applications in the Smartphone are accessing in various contexts, there would be a leakage of data and applications. Furthermore, when third party apps are downloading on Android-based platforms, it causes threats to the existing system applications. So, different access control policies have been implemented in the Android-based Smartphone to separate the own application and corporate application for providing security. Methods: This paper presents a survey of access control models in various frameworks and compares them by their performance evaluations. The performance of each framework is corresponding to the characteristics of access control policies. These access controls are categorizing according to role, discretionary, mandatory, context, and attributes. Finding: We have found that, Context-Based Access Control (CBAC) and Dynamic Role Based Access Control (DRBAC) are providing better performance. Hence, to give robust security for mobile operating systems the hybrid access policies can be considered. Applications: This hybrid approach might provide a good Android security framework with acceptable performance.

Keywords

Access Control Policy, Android OS, Framework, Security, Smartphone

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