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The research is centered on sensor networks with two types of nodes. The low end nodes are simple and low cost, while the high end nodes are costly but provide significantly more processing power. In this type of sensor networks, the low end nodes are clustered and report to a high end node, which is turn uses a network backbone to send data to a base station. In this research we have configured a...
In the publish/subscribe (pub/sub) communication scheme in wireless sensor networks (WSNs), there exist inherent tradeoffs among conflicting objectives in event publication. To address this issue, this paper investigates pub-/sub middleware for WSNs, called TinyDDS. With its self-configuring event routing protocol, TinyDDS adaptively performs event publication according to dynamic network conditions...
Congestion is generated by buffer overflow and generally is considered in transport layer. However, there is almost no considered one about existing routing protocols of sensor network because it is difficult to apply congestion control in transport layer of WSNs (wireless sensor networks) that have limited resources such as energy, buffer, and bandwidth of sensor nodes. Therefore, routing protocol...
Energy consumption of communication is a key factor of the lifetimes of wireless sensor networks. This paper presents an energy-efficient routing protocol for wireless sensor network. In the protocol, each sensor node detects the distance between the base station and itself. Then, it calculates a tier ID in according to the distance. A lower tier ID indicates a shorter distance between the base station...
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