Wireless sensor network is an emerging area of research due to vulnerability of sensing information from not approachable areas. In WSN sensor nodes have been deployed for sensing information and transmit this information to base station so that various decisions can be developed. In the processing of WSN data aggregation and energy consumption are major issues. In this paper a new approach has been purposed for data management and energy consumption reduction using dynamic clustering and avoidance ofredundant information transmission over the network. This approach use check sum approach for data redundancy checking and discard redundant or repeated information. This approach provides better results than previous approaches.
MANET is field of networking that is used to transmit information. MANET utilizes different routing strategies for data transmission from source to destination. Mobility is main concern in MANET due to path management for data transmission. In this paper MANET security has been discussed to overcome various attacks performed by attacker.in this paper black hole attack detection has been done on the basis of dynamic detection strategies malicious node that degrades performance of network has been detected. Purposed approach provides much better results than previous approaches available for data communication and attack detection in MANET.
VANET is designed for the wireless environment. Nodes are connected and exchange their information via wireless. Therefore some security measure must be considered in communication. Time Critical: The information in VANET must be delivered to the nodes with in time limit so that a decision can be made by the node and perform action accordingly.In this paper the main issue of road density is due to high load on road message communication get overhead due to less amount of network bandwidth to overcome this issue cognitive radio bandwidth can be utilize for data transmission by channel sensing and message can be transmit through cognitive radio channels.
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