The research was on the influence of transmission distance respectively on energy consumption and transmission rate in wireless sensor network. The views of traditional work on this impact was not so precise, which wa...
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The research was on the influence of transmission distance respectively on energy consumption and transmission rate in wireless sensor network. The views of traditional work on this impact was not so precise, which was essential to the performance of WSN. The sensor node used, experimental environment and design have been introduced;Then the packet loss ratio for different transmission distance have been examined experimentally, and their functional relation by fitting the experimental data have been acquired;finally, considering packet retransmission based on that conclusion at the same time, focused on the variance of energy cost and transmission rate with distance. The main contribution is to acquire the quantitative effect evaluation of one-hop transmission distance and performance in WSN.
The existence of selfish nodes seriously affects the routing performance of opportunistic networks (OppNet). To protect the OppNet against the nodes' selfish behavior, a credit-based selfish nodes detection mechan...
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The existence of selfish nodes seriously affects the routing performance of opportunistic networks (OppNet). To protect the OppNet against the nodes' selfish behavior, a credit-based selfish nodes detection mechanism was proposed to make it possible to keep away from such nodes during the process of message forwarding. The mechanism leverages 2-ACK messages to observe the nodes' behavior. Then the credit value was calculated based on the observation information and accordingly acts as the metric to distinguish the selfish nodes. Simulation results show that, when coupled with various routing algorithms, the mechanism could detect selfish nodes out accurately, and improve network performance effectively in terms of delivery rate and traffic load.
In event-driven wireless sensor networks, many redundant packets flow from monitored sites through the network and to the sink, resulting in a typical funnel effect which affects event reliability, negatively. Taking ...
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In event-driven wireless sensor networks, many redundant packets flow from monitored sites through the network and to the sink, resulting in a typical funnel effect which affects event reliability, negatively. Taking this transport property into account, a differentiated priority queue management scheme is presented, in which the packets with same event identification are prioritized according to their arrival sequence, and scheduled differentially. The queue model, packet prioritization strategy and event table maintaining methods are examined in detail. Simulation results show that the queue management scheme can improve event reliability of event-driven sensor networks in terms of event detection ratio, accuracy ratio, and event delay efficiently.
Considering that intravenous in blood infusion, usually applied without a proper control of the progress and velocity under unreliable manual monitoring practice, is the most popular and frequent clinical activity thr...
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Vehicular Ad hoc networks (VANET) consists of several vehicular nodes and uses 802.11p protocol for communication. Because of its unique characteristics, such as fast speed, serious Doppler effect, large node number e...
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Broadcast is a hot topic in wireless sensor network research. The main challenges are from network instability and complexity of communication collision. Currently, the broadcast protocols for sensor network focus on ...
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While the traditional Web, Email and other Internet applications are still used large-scale, Internet applications, such as typical P2P resource sharing, streaming, games, instant messaging and other new applications ...
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Service composition was the core problem of service computing, the validity and reliability of service composition had become the premise of service execution. A method was presented which utilizes the finite state ma...
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Service composition was the core problem of service computing, the validity and reliability of service composition had become the premise of service execution. A method was presented which utilizes the finite state machine (FSM) to model the business process's state transitions, and described the required properties with Alloy language. Then, Alloy model was used to formalize the service FSM and the required properties of the system. Finally, Alloy Analyzer was used to verify the model that whether the required properties were satisfied. It is shown that the method of Alloy-based verification of the service composition is of good feasibility.
Agent technology has played an important role in distributed network application and agent communication model is an inevitable problem in multi-agent system. We propose a "Shaikh-Guide" based agent communic...
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In this paper, no-wait flow shop scheduling problem with flowtime minimization is considered. Objective increment properties are analyzed and proved for fundamental operations of heuristics. With these properties, whe...
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