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Event detection and notification is a common task in a wireless sensor networks (WSN). Efficient data aggregation and minimization of energy consumption are the great research challenges in WSN. In WSN, aggregated event information is more important than individual event information for energy saving and reliability. Proximity queries or query approximation can be used to reduce the complexity of...
In sensor network applications, data gathering mechanisms, which are based on multi-hop forwarding, can be expensive in terms of energy. This limitation challenges the use of sensor networks for applications that demand a predefined operational-lifetime. To avoid this problem, using of mobile element (ME) as a mechanical data carrier has emerged as a promising approach. However, practical considerations...
This paper presents heterogeneity ratio (HR) as a new routing metric for heterogeneous MANETs. This metric is the ratio of number of powerful nodes to hop count that is used to select the best path to destination. Node heterogeneity is modeled in terms of: types and number of different interfaces, power, and transmission ranges. Our proposed routing metric is based on developing route discovery algorithm...
Wireless Sensor Networks (WSNs) are composed of autonomous and resource-constrained (power, sensing, radios, and processors) nodes. These networks are conceived to have a large number of nodes working on monitoring phenomena in an area. So, a major challenge for this networks is to provide solutions that maximize quality of service (QoS) requirements, such as coverage and data routing, and minimize...
Wireless sensor networks are a new emerging area where swarm intelligence can be applied with interesting implications. In fact, a strong analogy between unicellular organism colonies and wireless sensor networks can be emphasized: a sensor network can be viewed as a ldquocolonyrdquo of simple, scarce resource nodes that, autonomously, are able only to perform simple tasks, but all together can accomplish...
This paper envisions an urban scenario where people carry radio devices that can be dynamically networked, by exploiting human contact opportunities, to create unplanned, improvised and localized wireless connectivity, which has been recently called pocket switched networks (PSN).The paper focuses on the radio device (pocket mobility trace recorder, or PMTR) we have on purposely designed and developed...
The present paper presents considerations on using a low power routing solution for prolonging the battery life for motes within a wireless sensor network (WSN) without affecting the network connectivity. The solution applies for the cases when, the distances between motes and base stations are over the mote's communication range, and motes located between sinks and base station are commonly used...
Summary form only given. In hierarchical two-tiered sensor networks, higher-powered relay nodes have recently been proposed to be used as cluster heads for designing scalable sensor networks.The assignment of sensor nodes to clusters in an energy-efficient way is known to improve the lifetime of such networks. In this paper we have proposed two efficient distributed algorithms for assigning sensor...
We provide in this paper three algorithms that enable the sensor nodes of a wireless sensor network (WSN) to determine their location in presence of neighbor sensors that may lie about their position. Our algorithms minimize the number of trusted nodes required by regular nodes to complete their process of localization. The algorithms always work for a given number of neighbors provided that the number...
Ad hoc network is usually built up by battery-powered nodes, so the energy is limited, and the networkpsilas lifetime often depends on several hot nodes. This paper puts forward a routing protocol AODV-TEB (ad hoc on-demand distance vector - traffic-energy balanced) to solve this problem. In AODV-TEB, each node calculated its traffic load per second, and got its left battery, then formed a nonlinear...
The next generation communication systems will provide high quality multimedia services in a flexible and efficient manner. As an extension of next generation networks, Mobile Ad Hoc Networks (MANETs) have attracted significant attention amongst researchers. Nodes in a MANET have limited battery power. Hence, ad hoc routing protocols ought to be energy conservative to support real-time multimedia...
Wireless sensor network (WSN) comprises of a large number of small sensor nodes which are capable of sensing data processing and communicating. As we deal with a large number of sensors traditional routing protocols proposed for MANETs are not suitable for wireless sensor networks. In this paper we present a leveled meshed multipath routing (LMMPR) protocol. We first present the leveling scheme where...
Opportunistic routing (OR) schemes, such as ExOR, have been shown to provide significant throughput gains over traditional best-path routing schemes for wireless networks. Though the performance of OR schemes depend on the bit-rate, they currently use a fixed rate for transmitting packets. While several schemes have been proposed for selecting bit-rate for unicast transmission to a single receiver,...
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