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Several localization techniques have been proposed to identify the exact location of sensor nodes. Localization is important for computation of many applications such as routing in wireless sensor network. Energy preservation is a challenge in wireless sensor network and many algorithms have already been proposed. The localized node lifetime is maximized by using energy-efficient routing, use of minimum...
In recent years, Wireless Sensor Networks (WSNs) are booming to meet the fast-increasing requirements of data-centric services. Current researches on heterogeneous WSNs usually assume the integration of fixed sink node or gateway in WSNs. A few researches have concerned about the mobile terminals acting as a gateway. In order to support high priority communication Quality of Service (QoS), this paper...
Heterogeneous network convergence and emergency data transmission has become very hot in recently years. This paper proposed an adaptive transmission scheme to achieve Quality of Service (QoS) guarantee transmission when the emergency is found in multi-service sensor network. This scheme reduces the emergency data transmission delay and guarantees reliable emergency data transmission with the assistance...
Our earlier embedded QoS-aware residential gateway (EmQRG) for real-time class-based queuing (CBQ) bandwidth management is reviewed and experimentally demonstrated. EmQRG's high QoS is demonstrated in conjunction with a wireless ZigBee network of temperature/humidity monitoring sensors. Critically, the EmQRG sends a top-priority over-temperature alarm when any temperature/humidity module reports a...
This paper addresses questions of using wireless mesh networks (WMNs) in heterogeneous industrial infrastructures. This implies several problems like global addressing, handling of QoS requirements, interconnection with embedded networks. Our proposed solution is a publish/subscribe middleware. We discuss how it solves the mentioned problems. Real-world measurements and simulation results give an...
In this paper, we introduce a pricing model that ensures efficient resource allocation that provides guaranteed quality of service while maximizing profit in multiservice networks. Specifically, a dynamic allocation policy is examined that relies on online measurements while each service class operates under a probabilistic bound delay constraint. We present a rigorous analysis of the properties of...
A simple collision resolution algorithm is presented wherein a set of contending packets transmit randomly into a frame of n slots. Those packets involved in collisions retransmit in another n-slot frame, and so on till all originally contending packets achieve successful transmission. It is shown via a state space model that the algorithm attains a maximal throughput of 0.304 for the optimal frame...
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