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Strict delay performance guarantees are required by many applications in wireless sensor networks. Different from traditional approaches, the data aggregation and the stochastic characteristic need to be considered for the delay analysis in sensor networks. In this paper, the problem that how to calculate the stochastic delay bound under different aggregation schemes is solved with the stochastic...
Limited energy resources in wireless sensor networks (WSNs) call for a comprehensive cross-layer analysis of energy consumption in a multi-hop network. In this paper, we provide a stochastic analysis of the energy consumption in a random network environment. Accordingly, a comprehensive cross-layer analysis framework, which employs a stochastic queueing model in realistic channel environments, is...
In this paper we consider cooperative spectrum sensing to detect incumbent spectrum users (ISU) in cognitive radio (CR) networks. We propose a time-divisional cooperative periodic spectrum sensing (TD-CPSS) technique and analyze the detection performance based on the blind energy based detection scheme. The CR detects the presence of the ISU by means of TD-CPSS and opportunistically uses the spectrum...
This paper studies the sleep scheduling problem for large scale wireless sensor networks (WSNs), which have hundreds to thousands of sensors. Sensors are extremely sensitive to energy consumption because they are powered by batteries. In this paper, we propose stochastic sleep scheduling, a generic duty- cycling scheduling method based on stochastic theory. It lets each sensor fall asleep based on...
We analytically characterize the energy consumption per successfully transmitted packet in end-to-end packet transmissions in a wireless sensor network where nodes are identically and independently distributed in a square area following a homogeneous Poisson process. It is assumed that a greedy forwarding protocol is used for routing. We obtain analytical results on the average number of hops between...
MaxWeight algorithm, a.k.a., back-pressure algorithm, has received much attention as a viable solution for dynamic link scheduling in multi-hop wireless networks. The basic principle of the MaxWeight algorithm is to select a set of interference-free links with the maximum overall link weights in the network, where the link weight is determined by the queue difference between the transmitter and the...
We develop and analyze a trust management protocol for cognitive mission-driven group communication systems (GCSs) in mobile ad hoc networks (MANETs) using hierarchical modeling techniques based on stochastic Petri nets. The goal is to efficiently establish acceptable trust levels among mobile nodes without prior interactions. We seek to identify the optimal length of a trust chain among peers in...
This paper considers minimum-energy routing problem in Poisson random ad-hoc networks with Nakagami-m fading channels. We first formulate an analytical model for the transmission power, subject to a certain packet reception probability, under the assumption that the users employ proper power control and slotted ALOHA protocol. Based on this, we consider five routing strategies and compare their energy...
A method to determine the optimal clusterhead number in a clustered wireless sensor network is proposed to improve the energy efficiency of clustering schemes. The wireless sensor network is modeled as points locating randomly on the plane according to a homogeneous spatial Poisson process. This leads to derive the means of some typical cluster parameters accordingly. After that, the total energy...
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