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In recent years, the wireless sensor network (WSN) has become more and more popular, and the problem of WSN localization has attracted great attention. In non-line of sight (NLOS) propagation conditions, the localization is less accurate than in line of sight (LOS) propagation conditions because of the buildings between the mobile station and the base station obstruct the spread of waves. In order...
Reliable flooding in wireless sensor networks (WSNs) is desirable for a broad range of applications and network operations. However, relatively little work has been done for reliable flooding in low-duty-cycle WSNs with unreliable wireless links. It is a challenging problem to efficiently ensure 100% flooding coverage considering the combined effects of low-duty-cycle operation and unreliable wireless...
Radio duty cycling is a commonly employed mechanism to support long-term sustainable operations of WSNs. Combined with the effect of unreliable wireless links, many challenges arise for ensuring delay bounded data delivery with reliability constraint. However, research on energy-efficient data forwarding with statistical delay bound in duty-cycled WSNs still remains unaddressed. This paper proposes...
Link correlation in wireless sensor networks has recently attracted a considerable amount of attention in the research community. Various pioneer works have empirically demonstrated the existence of link correlations and designed novel network protocols to exploit such link correlations. While all existing works focus on the correlated receptions at multiple receivers from a single sender, in this...
A tree-based topology is often used to flood packets from the sink node in wireless sensor networks (WSNs). Therefore, flooding tree construction is an important and fundamental problem in WSNs, and has been extensively investigated in the literature. However, we note that the flooding tree construction problem in asynchronous low-duty-cycle WSNs has not been sufficiently investigated in existing...
In this paper, we exploit the geographic opportunistic routing (GOR) for QoS provisioning with both end-to-end reliability and delay constraints in wireless sensor networks (WSNs). Recent work exploits multipath routing to guarantee both reliability and delay QoS constraints in WSNs. However, the multipath routing approach suffers from a significant energy cost. We also find that existing GOR protocol...
This paper gives an improved alamouti 2*2 strategy in dense wireless sensor networks after analyse the model of communication between the transmitting cluster and receiving cluster. Simulation show the results of energy consumption among worst-channel, random-channel and optimal-channel. Some rules are given in the process of the simulation analyse.
Cooperative diversity can be applied to energy-constrained resource-constrained wireless sensor network s to significantly reduce node energy consumption. However, cooperation synergy must be carefully selected and coordinated to practically exploit this energy saving potential. In this paper we investigate synergy choice for energy minimization algorithm in a resource-constrained wireless sensor...
This paper studies data forwarding in wireless sensor networks (WSNs) where sensor nodes are randomly duty-cycled to save energy. The duty-cycling operation requires the data delivery strategy to be more adaptive for the dynamics caused by the uncertainty of node working schedules. However, the existing maximum-advance routing scheme, at each step the forwarding node selects the node closest to the...
Deterministic deployment issue is different from most cases in wireless sensor network. To find a solution for limited number of sensor nodes in known area, this article proposed a new method to attain minimum nodes and maximum detection probability. Based on a more realistic detection method, this article adapts Delaunay Triangulation method to deploy new nodes according to their importance. A scoring...
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