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The devices composing Wireless Sensor Networks (WSN) are very limited in terms of memory, processing power and battery. We need efficient routing algorithms to ensure a long lifetime of the WSN. However, many solutions focus on minimizing the average energy consumption of all the nodes. Since the lifetime is rather given by the death of the first node or by the disconnection of the network, these...
Network lifetime has become the key characteristic for evaluating sensor networks in an application-specific way. In this paper, we focus on Mobile Wireless Sensor Networks, which are specific opportunistic networks because of their poor connectivity among the mobile sensors, and thus it is difficult to form a well connected mesh network for transmitting data through end-to-end connections from the...
Deployment of wireless sensor networks always faces the issue of energy limitation. Without appropriate control policy, data messages might be routed over already-exhausted routes, quickly disrupting network connectivity. If a node transmits data at an excessively high power level, it not only depletes its own energy budget wastefully, but also interferes in other parallel transmissions. In this study,...
Topology change is the main factor that affects the network life time of Wireless Sensor Network (WSN) applications. In static WSN, the topology change is often caused by node failure which is due to energy depletion. However, in the Mobile WSN (MWSN), the main reason of the topology change is caused by the node movement. Since the mobile sensor nodes are limited in power supply and have a low radio...
Wireless Sensor Networks (WSNs) is an emerging field of engineering with various applications. They have emerged as a new class of large scale networks of embedded systems with limited communication, computation and energy resources. Recently adopted IEEE 802.15.4 standards for Low-rate Wireless Personal Area Network (LR-WPAN) are most extensively used communication platform for WSNs. Conventional...
A Wireless Sensor Network (WSN) is typically depicted as a distributed resource constrained platform for supporting novel pervasive applications. A possible approach is to develop applications over WSNs by resorting to mobile agent frameworks that are aimed to minimize resource costs and memory allocation. In this context, network topology is a major issue to be considered for resource optimization:...
Wireless Sensor Networks are gaining popularity due to the fact that they offer low-cost solutions for a variety of application domains. However, these networks are highly susceptible to attacks, due to both the open and distributed nature of the network, as well as the limited resources of the nodes, which dictate the implementation of sophisticated security frameworks. Trust-aware routing is an...
Traditional greedy geographic routing usually selects the neighbor node which distance to the destination node is nearest as the next hop node. This routing algorithm to find the minimum hop may choose low-quality data transmission link, resulting in lower packet delivery ratio and the reliability of data transmission worse. To solve this problem, summing up the existing geographic routing based on...
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