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Wireless sensor networks experience a number of problems not found in wired networks, such as limited power resources, location identification and message routing in a wireless medium. Analysis of small world networks have shown that it is possible to transmit information from one node to another node some random distance away within a small number of hops (i.e. small world networks have a small diameter)...
The emergence of ubiquitous communication helps make safer and unobstructed street. Sensor detection is a valid technology to collect and process traffic data (vehicular speed, vehicle density, images from street) with the help of equipped sensors under the road or installed along the street. Vehicular sensor network (VSN), developed from wireless sensor network (WSN), is characterized by unlimited...
Wireless sensor networks consist of a number of small wireless sensor nodes which take measurements and transmit them over wireless links. As wireless sensors are resource constrained, the usage of energy and memory must be done wisely to increase the lifetime of nodes. It is also necessary to deliver data reliably to make any application more useful to the end user. A reliable and lightweight routing...
Aimed at the features of event-driven wireless sensor network, a representation of the entire network communication quality named as “Routing-based global network Communication Quality Representation (RCQR)” is introduced and evaluated. In our simulation and test-bed experiments, there is subtle difference between LQG constructed by RCQR and the packet reception rate of the entire network. Moreover,...
This paper investigates and undertakes simulation based study of adhoc routing protocols in wireless sensor networks. For our simulation based study we have considered three different scenarios where a adhoc routing protocol can be applied, namely a) Phenom nodes with mobility, Sensor nodes with mobility while the SINK node is stationary b) Phenom nodes with mobility, Sensor nodes are stationary and...
The wireless sensor network is a new kind of wireless ad hoc network and highly applications prospects. The efficient routing protocol is the focus of researching. Now we request the sensor network more and more strictly demand with the deepening research and application. However, the congestion will make decrease performance of network quickly with the increase of data load in wireless sensor network...
A novel range-free localization approach, smallest enclosing Circle based Localization (SECL), has been proposed. This approach uses the center of smallest enclosing circle of neighboring anchor nodes to estimate the position of target. Comparing to centroid, SECL considers the geometrical coverage of anchors rather than the mass center of them. Consequently, SECL is robust to imperfect topology,...
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