With the advances in sensor technologies and its wide application scope, it is likely that sensor networks will consist of heterogeneous classes of nodes, including multimodal sensors, bigger highpower nodes, and smaller lowend nodes. The lowend nodes will use lowenergy wireless interface, forming unreliable wireless links. On the other hand, the highpower nodes can be equipped with broadband a...

This demonstration shows a powerful high-level, heterogeneous sensor networking framework, Cascades. We intend to demonstrate how, with this framework, application designers have great control over implementation designs without the requirement of indepth development. Several key components and example applications will be demonstrated, along with some important concepts used in this Python-bas...

sybil attacks pose a serious threat for wireless sensor networks (wsn) security. they can create problems in routing, voting schemes, decision making, distributed storage and sensor re-programming. in a sybil attack,the attacker masquerades as multiple sensor identities, that are actually controlled by one or a few existing attacker nodes. sybil identities are fabricated out of stolen keys, obt...

wireless sensor network includes a large number of nodes which are distributed in a geographical location. the essential fact about wsn is that energy of nodes is limited. therefore, presenting proper solutions as an optimized routing is crucial to equally use energy of all nodes. in this paper we propose a method which performs routing in wsns using greedy approach. it is able to choose optimu...

in recent years, many researchers have been done in the area of wireless sensornetworks that has led to the variety of algorithms and methods for the collection andtransmission of environment information; but still many challenges faced bywireless sensor networks using methodologies are applied in various fields. such asmedia access control that due to the media being shared on these networks, ...

nowadays, wireless sensor network has been of interest to investigators and the greatest challenge in this part is the limited energy of sensors. sensors usually are in the harsh environments and transit in these environments is hard and impossible and moreover the nodes use non- replaceable batteries. because of this, saving energy is very important. in this paper we tried to decrease hard and...

This paper presents Servilla, a highly flexible service provisioning framework for heterogeneous wireless sensor networks. Its service-oriented programming model and middleware enable developers to construct platform-independent applications over a dynamic set of devices with diverse computational resources and sensors. A salient feature of Servilla is its support for dynamic discovery and bind...

Key predistribution is a popular technique for key distribution in sensor networks. The schemes available in current literature using this approach are for nodes with no or limited mobility. In this paper we present two key predistribution based scheme for heterogeneous networks i.e. networks which consist of nodes which are stationary as well as highly mobile. The existing schemes make use of ...

KEJIANG XIAO, RUI WANG, CAI CAI, SHAOHUA ZENG AND ZAHID MAHMOOD Information and Communication Company of State Grid Hunan Electric Power Company Changsha, 410007 China Institute of Computing Technology Chinese Academy of Sciences Beijing, 100190 China Department of Basic Curriculums Changsha Environmental Protection College Changsha, 410004 China School of Computer and Communication Engineering...