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PSWare: A publish / subscribe middleware supporting composite event in wireless sensor network

PSWare: A publish / subscribe middleware supporting composit...

引用

ieee international conference on Pervasive computing and Communications (PerCom)

作者： Steven Lai Jiannong Cao Yuan Zheng Hong Kong Polytechnic University Hong Kong China

Middleware for wireless sensor network (WSN) has been proposed as an effective solution to ease the application development by providing high-level abstractions. One of the important tasks of middleware in WSN is to support event service. As an important paradigm for event service, publish / subscribe (pub/sub) can support the asynchronous data exchange for applications and has received a lot of attention in traditional distributed systems. In WSNs, however, the design of pub/sub, especially on composite events, has not been adequately addressed. In this paper, we present the design and implementation of PSWare, a pub / sub middleware for WSN which can support both primitive and composite events. Our contribution mainly includes three parts. First, we propose an event definition language (EDL), which is specifically tailored to WSNs and can achieve high expressiveness and availability in the definition of primitive and composite events. The application programmers of PSWare can use the proposed EDL to define events in a simple manner. We implemented a compiler to compile the program written in EDL into byte codes. Second, we develop a runtime environment on sensor nodes, which provide a platform to run the compiled byte codes. Finally, we propose a composite event detection protocol to detect the events in an energy-efficient fashion.

关键词： Middleware Wireless sensor networks Event detection Programming profession Runtime environment Intelligent sensors Monitoring Intelligent transportation systems Availability Program processors

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Development of distributed integrated navigation simulator for autonomous spacecraft

Development of distributed integrated navigation simulator f...

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ieee international conference on Mechatronics and Automation

作者： Weihua Ma Jianjun Luo Mingming Wang Zhanxia Zhu College of Astronautics Northwestern Polytechnical University Xi'an Shanxi China

Before developing an integrated navigation system, it is an efficient method to build an integrated navigation simulator to reduce cost and shorten period of development. Building a distributed simulator with multiple computers will be more close to the actual system. A distributed integrated simulator for spacecraft autonomous navigation, with the characteristics of modularization and universalisation, was developed with computers and data bus. Based on the previously research, autonomous navigation sensors consists of Strap-down Inertial Navigation System (SINS), Global Positioning System (GPS) and Star sensor (SS). To realize integrated navigation function, the configuration of the distributed simulator was designed to include Trajectory Generator subsystem, Inertial Measurement Unit subsystem, SINS subsystem, GPS subsystem, SS subsystem and Integrated Navigation subsystem. Hardware design and software development of the simulator are discussed. The federated/centralized Kalman filters are used as simulator information fusion algorithm. The distributed simulator has been applied successfully to provide useful advice for designers.

关键词： Navigation Space vehicles Computational modeling Global Positioning System Computer simulation distributed computing sensor phenomena and characterization sensor systems Silicon compounds Costs

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distributed Flooding-based Storage Algorithms for Large-Scale Wireless sensor Networks

Distributed Flooding-based Storage Algorithms for Large-Scal...

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ieee international conference on Communications

作者： Salah A. Aly Moustafa Youssef Hager S. Darwish Mahmoud Zidan Faculty of Computers & Information Cairo University Giza EG Egypt Wireless Intelligent Networks Center (WINC) Nile University Smart Village EG Egypt Faculty of Computers & Information Cairo University Giza EG Faculty of Computers & Information Ain Shams University Cairo EG Egypt

In this paper we propose distributed storage algorithms for large-scale wireless sensor networks. Assume a wireless sensor network with n nodes that have limited power, memory, and bandwidth. Each node is capable of both sensing and storing data. Such sensor nodes might disappear from the network due to failures or battery depletion. Hence it is desired to design efficient schemes to collect data from these n nodes. We propose two distributed storage algorithms (DSA's) that utilize network flooding to solve this problem. In the first algorithm, DSA-I, we assume that the total number of sensors is known to each sensor in the network. We show that this algorithm is efficient in terms of the encoding and decoding operations. Furthermore, every node utilizes network flooding to disseminate its data throughout the network using a mixing time of approximately O(n). In the second algorithm, DSA-II, we assume that the total number of nodes is not known to every sensor;hence dissemination of the data does not depend on n. The encoding operations in this case take O(Cμ~2), where μ is the mean degree of the network graph and C is a system parameter. We evaluate the performance of the proposed algorithms through analysis and simulation. We show that the performance of the proposed algorithms matches the derived theoretical results.

关键词： Large-scale systems Wireless sensor networks Peer to peer computing Computer networks Encoding distributed computing Algorithm design and analysis Analytical models Communications Society Intelligent networks

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A distributed operating system supporting strong mobility of reconfigurable computing applications in a swarm of unpiloted airborne vehicles

A distributed operating system supporting strong mobility of...

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ieee international conference on Field-Programmable Technology (FPT)

作者： Mark Jasiunas Avishek Chakraborty David Kearney Reconfigurable Computing Laboratory School of Computer and Information Science University of South Australia Mawson Lakes SA Australia

The use of reconfigurable computing in networked and distributed applications is of great interest in supporting the needs of high performance algorithms such as image processing on swarms of small unpiloted airborne vehicles (UAVs). In a swarm each UAV can be considered as a node in a sensor network. The addition of an FPGA to each node allows complex image recognition to be implemented within the restricted power budget of the small UAVs that make up the nodes. In some continuous surveillance applications distributing the processing across several UAVs with mobility of FPGA bit streams between UAVs, depending on the context of the current mission, can an important requirement. This allows UAVs to share the available electrical and processing power in the network or to maintain continuous coverage of the mission as UAV nodes are replaced for refuelling. In this paper we present a distributed operating system for reconfigurable computing that supports distribution and strong mobility of reconfigurable applications across a sensor network based on a swarm of small UAVs. The operating system supports check-pointing of stream based reconfigurable computing applications so that they can be moved during execution between nodes in the network based on the current context of the swarm task. A full prototype of the operating system has been implemented and is being used in an application that involves the search and location of bushfire hotspots. The paper gives some insight into the architecture of the operating system and describes into how application execute on the operating system.

关键词： Operating systems Computer applications distributed computing Unmanned aerial vehicles Computer networks Field programmable gate arrays High performance computing Image processing Image recognition Surveillance

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Decentralized Path Planner for Multi-robot systems

Decentralized Path Planner for Multi-robot Systems

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international conference on Tools for Artificial Intelligence (ICTAI)

作者： Yansheng Zhang Farokh B. Bastani I-Ling Yen Computer Science Department University of Texas Dallas USA

In this paper, a distributed path planner is presented based on a hierarchical control structure for a virtual vehicle system. The high-level planner cooperates closely with lower level planners to determine the shortest path for the virtual vehicle. The computation task is distributed among all the mobile robots to achieve better load balancing and efficient use of available computational resources. Moreover, a dynamic environment is considered in the path planner. With prior knowledge about the environment, the planner efficiently adjusts the original planned path and generates a new collision-free path when the sensor readings in the mobile robots report that a new obstacle has been detected. A virtual structure for a rigid-body transportation system that employs a large number of robots to lift a rigid body and transport it to a user specified location is presented along with the distributed path planner.

关键词： Multirobot systems Path planning Mobile robots Robot kinematics Vehicles Motion planning Computer science Transportation distributed computing Artificial intelligence

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distributed And Parallel Multisensor Fusion In The Wavelet Domain

Distributed And Parallel Multisensor Fusion In The Wavelet D...

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2009 ieee international conference on Intelligent computing and Intelligent systems(ICIS2009)

作者： Chen Shaodong The 613th Institute AVIC-1,471009 Luoyang,China Li Jianxun,Jiang Xingtong Department of Automation Shanghai Jiao Tong University Shanghai,China

By combining the wavelet domain filtering and multi-sensor linear information fusion rule,we propose a new distributed and parallel algorithm for multi-sensor information fusion using the theory of wavelet domain multi-scale *** proposed algorithm decomposes the single sensor's information into different scale,and then estimates the target state in different scale;then the local state estimates are transmitted to the fusion-center to get the optimal information fusion *** posterior Cramer-Rao lower bound (PCRLB of the proposed algorithm is also *** example of radar tracking system with three sensors is provided to illuminate the effectiveness of the method.

关键词： Wavelet domain Multi-sensor fusion distributed fusion Information fusion CRLB

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A Performance Comparison of Recent Network Simulators

A Performance Comparison of Recent Network Simulators

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ieee international conference on Communications (ICC)

作者： E. Weingartner H. vom Lehn K. Wehrle Distributed Systems Group RWTH Aachen University Aachen Germany

A widespread methodology for performance analysis in the field of communication systems engineering is network simulation. While ns-2 has established itself as virtually the standard network simulation tool, other network simulators have gained more and more attention during the last years. In this paper, we briefly survey new developments in the field of network simulation and conduct a performance comparison study by implementing an identical simulation set-up in five simulators, namely ns-2, OMNet++, ns-3, SimPy and JiST/SWANS. Our results reveal large differences according to both run-time performance and memory usage.

关键词： Computational modeling Peer to peer computing Discrete event simulation Computer simulation Computer networks Wireless sensor networks Analytical models Runtime Computer architecture Protocols

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Completely distributed Low Duty Cycle Communication for Long-Living sensor Networks

Completely Distributed Low Duty Cycle Communication for Long...

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ieee international conference on Computational Science and Engineering, CSE

作者： Marcin Brzozowski Hendrik Salomon Peter Langendoerfer IHP Frankfurt Germany

A lifetime of several years for wireless sensor nodes can be achieved if their activity period is minimized. This can be done by using low duty cycle protocols. One of the challenges of these low duty cycle protocols is the synchronization of wake-up times. This becomes even more demanding if a wired central sink, which takes care of the schedule, is missing and communication links are unreliable. In this paper, we present our own distributed low duty cycle MAC (DLDC-MAC) protocol, which achieves a lifetime of two years using off-the-shelf sensor nodes. Our protocol synchronizes wake-up times of nodes in a fully decentralized way, even when plenty of transmitted packets get lost. We evaluated this in a real world scenario with 10 sensor nodes working for 14 days in our office space. Interestingly, the experiment showed that direct communication over long distances led to very high packet error rate, sometimes higher than 30%. In that case, multi-hop transmission delivered data with much higher reliability, with packet error rate close to 0%.

关键词： Wireless sensor networks Media Access Protocol Synchronization sensor phenomena and characterization Job shop scheduling Error analysis Telecommunication network reliability sensor systems Computer networks distributed computing

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Peer-to-peer (P2P) earthquake warning system based on collaborative sensing

Peer-to-peer (P2P) earthquake warning system based on collab...

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Inaugural ieee-IES Digital Ecosystems and Technologies conference, DEST

作者： Eduard Heindl Business Informatics Furtwangen University Furtwangen Germany

We describe a completely new concept of earthquake warning. The collaborative system is based on distributed systems that are interconnected by a network like the Internet. Modern systems may have multiple sensors to detect movements. These sensors are integrated to detect a shock movement before the hard disk may be hurt. Another sensor for movement is the hard disk itself, due to its extreme precise spatial resolution, the readout process is very sensible to minor acceleration of the disk. We can collect all this data to understand the movement of the computer system. Since there are many other sources of acceleration beside an earth quake, we have to use the collective detection of many independent systems. For fast and efficient detection we describe a P2P (peer-to-peer) solution to solve this part. The fact that earthquakes generate different types of movement makes it in principle feasible to predict a major movement a few ten seconds before the disaster happens.

关键词： Peer to peer computing Earthquakes Alarm systems Collaboration Hard disks Acceleration IP networks sensor systems Electric shock Spatial resolution

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Adaptive and distributed scheduling in heterogeneous MIMO-based ad hoc networks

Adaptive and distributed scheduling in heterogeneous MIMO-ba...

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ieee Internatonal conference on Mobile Adhoc and sensor systems (MASS)

作者： Shan Chu Xin Wang Department of Electrical and Computer Engineering Stony Brook University Stony Brook NY USA

Multiple-input and multiple-output (MIMO) technique is considered as one of the most promising wireless technologies that can significantly improve transmission capacity and reliability. Many emerging mobile wireless applications require peer-to-peer transmissions over an ad hoc network, where the nodes often have different number of antennas, and the channel condition and network topology vary over time. It is important and challenging to develop efficient schemes to distributively coordinate transmission resource sharing among a heterogeneous group of nodes over an infrastructure-free mobile ad hoc network. In this work, we propose a holistic distributed scheduling algorithm that can adaptively select different transmission strategies based on the node types and channel conditions to effectively relieve the bottleneck effect caused by nodes with smaller antenna arrays, and avoid transmission failure due to violation of channel constraint. The algorithm also takes advantage of channel information to opportunistically schedule cooperative spatial multiplexed transmissions between nodes and provide special transmission support for higher priority nodes with weak channels, so that the data rate of the network can be maximized while user transmission quality requirement is supported. The performance of our algorithm is studied through extensive simulations and the results demonstrate that our algorithm is very effective in handling node heterogeneity and channel constraint, and can significantly increase the throughput while reducing the transmission delay.

关键词： Adaptive scheduling Ad hoc networks Peer to peer computing Transmitting antennas Scheduling algorithm Adaptive arrays MIMO Mobile antennas Network topology Resource management

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