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This paper presents a versatile heterogeneous sensor network simulator library that incorporates an online power model for real-time resource management research projects. The library integrates a well-known multi-agent simulator library Swarm, a popular sensor operating system, TinyOS, and a sensor network simulator tool called TOSSIM. The motivation of designing our library is to address difficulties...
Multi-dimensional temporal data set is the common format in sensor network applications to store sampled temporal data. As time goes on, the size of the core tables in the data set may increase to enormous size and the tables become not managable. In order to reduce storage space and allow on-line query, how to trade off data compression effectiveness for on-line query performance is a challenge issue...
Task allocation has been widely studied in high-performance computing environment. However, existing task allocation algorithms can not be directly applied to WSN because of the limited energy resources and computing capabilities of the Wireless Sensor Network (WSN). In this paper, we propose a new auction-based task allocation model for WSN and create an energy consumption based utility function...
To improve communication reliability and protocols'portability on the nodes of wireless sensor network and ease the development difficulty, a new system design scheme based on the embedded operating system μC/OS-II is proposed in this paper. According to operating system modular design strategy, the way of task partitioning for network protocol stack is present and the operating system is transplanted...
Program codes running on the sensor nodes need to be updated from time to time to fix bugs, tune the parameters, insert new functions, or delete useless codes. In this paper, we propose a policy-based reprogramming framework that can optimize the reprogramming process based on the execution characteristics of modules that constitute the WSN applications. To accomplish this we model the characteristics...
Considering the data-centric feature of wireless sensor networks and different data has the different requirement of real-time. A new data aggregation algorithm- Miscellaneous data aggregation algorithm based on timeliness of data in wireless sensor networks (MDA) is proposed. This algorithm can adaptability adjusts the data fusion strategy according to the results of the analysis of data time-lines...
The design of a wireless sensor network is a challenging task due to its intrinsically application-specific nature.Although a typical choice for testing such kind of networks requires devising ad-hoc testbeds, this is often impractical as it depends on expensive, and hard to maintain deployment of nodes. On the other hand, simulation is a valuable option, as long as the actual functioning conditions...
In rescue scenarios, real-time requirements are one key issue when using wireless sensor networks (WSNs) for tracking and monitoring of rescue forces. If a node detects an alarm condition, the alarm message must be delivered to the base station in time. To guarantee the timely delivery the whole system architecture has to fulfill real-time requirements. There are only a few real-time architectures...
TinyOS is an open-source operating system, using Component Description Language NesC for development. TinyOS is designed mostly for wireless sensor network, in which nodes have very limited resources. A representative scheduling mechanism in TinyOS is analyzed and its shortcomings are listed in this paper. An improved design of the priority-based soft real-time task scheduling strategy is proposed...
Embedded wireless networks have largely focused on open loop sensing and monitoring. To address actuation in closed loop wireless control systems there is a strong need to re-think the communication architectures and protocols for reliability, coordination and control. As the links, nodes and topology of wireless systems are inherently unreliable, such time-critical and safety-critical applications...
The paper shows a compact hard real-time operating system for wireless sensor nodes called PAVENET OS. PAVENET OS provides hybrid multithreading: preemptive multithreading and cooperative multithreading. Both of the multithreading is optimized for two kinds of task on wireless sensor networks, and the kinds are real-time tasks and best-effort tasks. PAVENET OS can efficiently perform hard real-time...
Acoustic scene analysis can be used to extract relevant information in applications such as homeland security, surveillance and environmental monitoring. Wireless sensor networks have been of particular interest in monitoring acoustic scenes. Sensors embedded in such a network typically operate under several constraints such as low power and limited bandwidth. In this paper, we consider resource-efficient...
This paper proposes micro muT-Kernel, a real-time operating system for networked tiny devices, which adopts a preemptive priority-based scheduling. It provides a sophisticated application programming interface to facilitate software development. In addition, to provide rich functionalities with a small-footprint, the kernel is reconfigurable with respect to the API. Moreover, muT-Kernel supports a...
Wireless sensor and actor networks are potentially one of the most important technologies of this century. There are many fields where they can be used in order to develop varied and interesting applications: high security environments, environmental monitoring, objects and events detection, military surveillance and precision agriculture. On the other hand, the ease of programming is a major barrier...
Monitoring and control of systems using a wireless sensor network (WSN) play a significant role in rapid automated response to events. Automation drives the necessity to check the system correctness due to the critical nature of the operations (i.e. military, air traffic management). The motes in a WSN are event-driven systems. The evolution of the system can be captured by discrete and continuous...
The main challenge faced by outlier detection techniques designed for wireless sensor networks is achieving high detection rate and low false alarm rate while maintaining the resource consumption in the network to a minimum. In this paper, we propose an online outlier detection technique with low computational complexity and memory usage based on an unsupervised centered quarter-sphere support vector...
Wireless sensor networks (WSN) have evolved quickly in recent years, leading to systems such as RF and Zigbee, which are commonly adopted in lights, curfew, elderly - nursing. However, RF and Zigbee system are seldom integrated effectively. This study presents a system built like WebNet, expressed in terms of UML. The proposed system behaves like Zigbee with NS2, since it combines RF with a real-time...
We are in the presence of a new and powerful technology called wireless sensor and actor networks. There are many fields where we can apply this technology to develop varied and interesting applications: high security environments, environmental monitoring,industrial monitoring, medicine, precision agriculture. This technology brings the need to develop new frameworks in order to make easier the application...
HARETICK is a hard real-time compact operating kernel designed specifically to support critical applications on DSP and embedded platforms including intelligent sensor networks and robotic environments. It provides operating support for both hard real-time and soft/non real-time tasks. The hard real-time task execution context is based on non-preemptive mechanisms. This paper focuses on the inter-task...
In this paper we present our experimental results in data management for wireless sensor networks when an adapted Fuzzy ART model of neural networks is applied. Our system provides high dimension reduction and transfer savings, sending only classified identification number instead of whole sample. The system implementation is based on MicaZ sensor motes and adapted Fuzzy ART model. It was applied...
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