Wireless sensor networks have many sensor nodes with a limited energy in a limited area. One of key issues in wireless sensor networks is to prolong the network lifetime. In this paper, we propose a scheme to construct an energy-efficient cluster structure in wireless sensor networks. Our scheme considers both the residual energy of sensor nodes and the number of neighbors around each node when...

Wireless sensor networks are a web of sensor nodes with a set of processor and limited memory unit embedded in it. Reliable routing of packets from the sensor node to its base station is the most important task for the networks. In wireless sensor networks, routing is bit more complex than other wired or wireless networks. The routing protocols applied for the other networks cannot be used here...

Advances in sensor technology and computer networks have enabled distributed sensor networks (DSNs) to evolve from small clusters of large sensors to large swarms of micro sensors, from fixed sensor nodes to mobile nodes, from wired communications to wireless communications, from static network topology to dynamically changing topology. To design these networks, the factors needed to be conside...

Many wireless sensor networks applications have been investigated such as in scientific, medical, commercial, and military domains, to perform sensing and monitoring in physical world. Large-scale wireless sensor networks are composed of hundreds or thousands of autonomous sensor nodes. Effectively managing sensor networks is a major challenge. An SNMP-like sensor network management system, WSN...

In this position paper, we argue that the mainstream view in our community of what makes for problems in sensor networks that are worthy of attention is very lopsided, focusing much more on pure networking and other classical computer systems issues, than on the equally important but often neglected tasks of modeling of distributed signal fields, and on their acquisition, processing, synthesis ...

A framework for the autonomous management of large-scale ubiquitous sensor networks called SNOWMAN (SeNsOr netWork MANagement) is proposed in this paper. In large-scale ubiquitous sensor networks, a huge number of sensor nodes are deployed over a wide area and long distances and multi-hop communication is required between nodes. So managing numerous ubiquitous sensor nodes directly is very comp...

Wireless sensor networks are envisioned to consist of many small devices that can sense the environment and communicate the data as required. The most critical requirement for widespread sensor networks is power efficiency since battery replacement is not viable. Many protocols attempt to minimize the power consumption by using complex algorithms. However, it is difficult to perform these compl...

Random Key Distribution (RKD) schemes have been widely accepted to enable low-cost secure communications in Wireless Sensor Networks (WSNs). However, efficiency of secure link establishment comes with the risk of compromised communications between benign nodes by adversaries who physically capture sensor nodes. The challenge is to enhance resilience of WSN against node capture, while maintainin...

A sensor network is made up of a large number of sensors with limited energy. Sensors collect environmental data then send them to the sink. Energy efficiency and thereby increasing the lifetime of sensor networks is important. Direct transfer of the data from each node to the central station will increase energy consumption. Previous research has shown that the organization of nodes in cluster...

An integrated hardware and software system for a three dimensional wireless sensor networks is designed and developed for construction monitoring system. Compared to traditional monitoring system, the construction monitoring system based on wireless sensor networks has many advantages. In this paper, we discuss the design and evaluation of the three dimensional wireless sensor networks for cons...