Published in 2016
S.Saranya, C.Dhivya, V.Priya, D.Ponniselvi
A mobile ad hoc network (MANET) is a collection of wireless mobile nodes dynamically forming a network topology without the use of any existing network infrastructure or centralized administration. Routing is the process which transmitting the data packets from a source node to a given destination. .Many routing protocols such as proactive, reactive and hybrid. Reactive routing protocols have been found to be user friendly and efficient when compared to other routing protocols. The main boon of routing protocols when compared with proactive and Hybrid routing protocols is the relatively unconditional low storage requirements, higher mobility and the availability of routes when needed. In this paper, we have present three types of Routing Protocols are studies i.e. proactive, reactive, and hybrid in MANETs
Mobile ad-hoc network, application and challenges, routing protocol.
N.Kowsalya, S.Kavitha
Sensor devices are deployed to monitor an area. Area surveillance is the main operation of the sensor devices. Radio frequency based data communication is adapted under the sensor network. Coverage property of the sensors is considered in the network deployment process. Sensor network operations are handled between the network owner and the user objects. All the data access privileges are granted by the network owner with reference to the payment by the users. All the user request and response transactions are secured using the privacy preservation models. The sensor data access is managed with Distributed Privacy-Preserving Access Control (DP2AC) scheme. Sensor data query process is verified with the tokens. The network owner verifies the tokens and transfers the query results to the user. Token preparation and verification operations are carried out using the blind signature values. Public verification and reuses control mechanism are supported by the Distributed Token Reuse Detection (DTRD) scheme. Witness nodes, Rectilinear Double Ruling and Spherical Double Ruling models are used for the token reusable detection process. The secured data transmission scheme is integrated with the data verification methods. Digital signature based attack control mechanism is adapted in the system. The data query operations are protected with anonymous and malicious user attacks. Computational overhead and communication overhead are also minimized in the system.
Wireless Sensor Networks, Blind Signature, Privilege Management, Token Generation and Verification and Privacy Preserved Data Query.
Dr.T.Ramaprabha, V.Premalatha
The Vehicular Ad-Hoc Network, or VANET, is a technology that uses moves cars as nodes in a network to create a mobile network. VANET turns every participating car into a wireless router or node, allowing cars approximately 100 to 300 metres of each other to connect and, in turn, create a network with a wide range.VANET is emergent technologies that they deserve, recently, the attention of the industry and the academic institutions. The vehicular communications (VC) meet in the centre of numerous initiatives of the research that enhance the security and the efficiency of transportation systems, supplying, for example, acknowledgments of the ambient conditions (snow, fire, etc.), traffic in the road conditions (emergency, construction sites, or congestion). In this paper, we survey on security issues and challenges in VANET.
VANET, IEEE 802.11 , Security, TDMA, SDMA, and CSMA.
S.Aravindhan, Dr.D.Maruthanayagam
Clustering is the process of grouping the data into classes or clusters, so that objects within a cluster have high similarity in comparison to one another but these objects are very dissimilar to the objects that are in other clusters. Clustering methods are mainly divided into two groups: hierarchical and partitioning methods. Agglomerative group will be a "bottom up" approach and each observation start in its own cluster, and pairs of clusters are merged as one move up the hierarchy. Divisive group will be a "top down" approach and all observations start in one cluster, and splits are performed recursively as one moves down the hierarchy. In this paper, analysis and review about hierarchical clustering which is mainly focus on hierarchical agglomerative clustering (HAC) technique. Then we also presents detail description of some hierarchical agglomerative clustering technique related previous research papers for understanding the importance of hierarchical clustering concepts in various research areas.
Clustering, Agglomerative, Divisive, WSN and Hierarchical Clustering
J. Shabana, Dr. P. Srivaramangai
Nowadays trust models are one of the most important to build up trust relationships among sensor nodes. Most of the existing work is missing the following problem. First problem is in the current research work, the assessment of trust values for sensor nodes is mainly based on the communication (successful and unsuccessful communications) point of View. Proposed work also considers other trust metrics such as the energy level should also be taken into account to calculate the trustworthiness of sensor nodes. Second there are two common ways to establish trust in WSNs: calculating direct trust based on direct interactions and calculating indirect trust value based on recommendation from the third party. However, not all the third parties are trusty and not all the recommendations are reliable. Thus, a discriminate analysis about the third party and recommendation is essential. Third Most existing studies only provide the trust assessment for neighbor nodes. However, in real applications, a sensor node sometimes needs to obtain the trust value of the non-neighbor nodes. Therefore, providing the trust assessment for non-neighbor nodes becomes very important. Fourth, because of the dynamic topology, the trust relationship between sensor nodes constantly changes in WSNs. Trust is a dynamic phenomenon and changes with time and environment conditions. However, most existing trust models do not solve the trust dynamic problem. In order to solve the above-mentioned problems, propose an Efficient Distributed Trust Model (EDTM) for WSNs. Implementation results will show that EDTM outperforms other similar models, e.g., (Node Behavioral strategies banding belief theory of the Trust Evaluation) NBBTE trust model.
Trust Model, Wireless Sensor Network, Efficient Distributed Trust Model