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distributed collab.ration for event detection in wireless sensor networks

Distributed collaboration for event detection in wireless se...

3rd International Workshop on Middleware for Pervasive and Ad-Hoc Computing, MPAC'05, Held at the ACM/IFIP/USENIX International Middleware Conference

作者： Phani Kumar, A.V.U. Reddy V, Adi Mallikarjuna Janakiram, D. Distributed and Object Systems Lab. Department of CS and E Indian Institute of Technology Madras Chennai India

ISBN: (纸本)1595932682

With the advancement of technology in micro-electronics and wireless communication, small miniature devices called sensor nodes can be used to perform various tasks by forming themselves in to wireless sensor networks. In Wireless Sensor Networks(WSN), event detection is one of the main requirements for most of the applications. An event can be a simple event or a combination of two or more simple events (Composite Event). Detecting and reporting an event desired by the application (user) inspite of stringent constraints of sensor nodes like low energy, low bandwidth, frequent failures etc., is one of the main challenges in WSN. This can be achieved with less uncertainty and masking failures by considering collab.ration among sensor nodes. We propose a framework for distributed event detection using collab.ration in WSN. The framework consists of two protocols that build a tree by using a communication model similar to the Publish-Subscribe paradigm. This framework is a part of Component Oriented Middleware for Sensor networks (COMiS). In COMiS framework, components are loaded as and when required based on the application semantics. If collab.ration is considered, the goal of the application can be easily accomplished even in case of failures of sensors and low energy of nodes. Copyright 2005 ACM.

关键词： Middleware

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Roles:From objects, security and databases perspective

Roles:From objects, security and databases perspective

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2005 AAAI Fall Symposium

作者： Chandra Sekharaiah, Kangaluru Janaki Ram, D. Distributed Object Systems Group Department of Computer Science and Engg. JNTU College of Engineering Hyderabad India Distributed Object Systems Lab. Department of Computer Science and Engg. Indian Institute of Technology Madras

ISBN: (纸本)1577352548

A role paradigm conformance model (RPCM) called Typehole model was developed and implemented in Java. It does not use Is-role-of inheritance and is free from the object schizophrenia (OS) problem (OSP). An extended distributed role model provides multifarious role hierarchies at different sites. Modeling object role systems is prone to OSP. OSP is the error in the RPCM design to subscribe to the viewpoints in the client space. OS and OSP are contrasted. A classification of OSPs is made. Role modeling problem is the requirement to design an OSP-free RPCM with Is-role-of inheritance. The existing object-oriented role models have been evaluated as regards OSP. No role model has strong claims as regards solving the role modeling problem. A security model was developed for RPCM-based distributed object systems and implemented on CORBA. By designing message filter hierarchies, hybrid security is developed at global and local levels for RPCM-based object systems. Role is either abstract or concrete as it can be a type or an instance. Copyright © 2005, American Association for Artificial Intelligence (***). All rights reserved.

关键词： Database systems

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e-petri net model for programming integrated network of wireless sensor networks and grids

e-petri net model for programming integrated network of wire...

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CIT 2007: 7th IEEE International Conference on Computer and Information Technology

作者： Adimallikarjuna Reddy, V. Kumar, A. V. U. Phani Janakiram, D. Distributed and Object Systems Lab. Department of Computer Science and Engineering Indian Institute of Technology Madras Chennai 600036 India

ISBN: (纸本)0769529836

Applications like weather forecasting and prediction, health-care monitoring, habitat monitoring, tsunami-warning systems, demand integration of Wireless Sensor Networks (WSNs) with grids. The issues that need to be addressed are, providing suitable programming platform, seamless networking, data management, service/resource discovery etc. objective of this work is to provide a programming model for this integrated network. We propose a programming model built using e-Petri Net, an extension to the classical Petri Net. We define the meta model for the e-Petri Net using Generic Modeling Environment (GME) tool. This meta-model gives the flexibility in understanding and analysing the application before hand. © 2007 IEEE.

关键词： Wireless sensor networks

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GDP: A paradigm for intertask communication in grid computing through distributed pipes

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2nd International Conference on distributed Computing and Internet Technology, ICDCIT 2005

作者： Janakiram, D. Reddy, M. Venkateswara Srinivas, A. Vijay Mohamed, M. A. Maluk Kumar, S. Santosh Distributed and Object Systems Lab. Dept. of Computer Science and Engg. Indian Institute of Technology Madras Chennai India

ISBN: (纸本)3540309993

Existing grid models target purely data parallel applications without inter-task communication. This paper proposes a transparent programming model to support communicating parallel tasks in a wide area grid. The proposed grid model with distributed Pipes (DP) abstraction named as, GDP, enables location independent intertask communication among processes on machines spread over a wide area distributed system. This approach enables anonymous migration of communicating parallel tasks adjusting to grid dynamics. The proposed model supports sequential load to coexist with parallel load. A prototype of the proposed model has been implemented over clusters of nodes spread across the Internet. A steady state equilibrium engineering problem was studied over the model. Performance studies show linear to super linear speed up for the application. © Springer-Verlag Berlin Heidelberg 2005.

关键词： distributed computer systems

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A model for characterizing the scalab.lity of distributed systems

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Operating systems Review (ACM) 2005年第3期39卷 64-71页

作者： Vijay Srinivas, A. Janakiram, D. Distributed and Object Systems Lab. Dept. of Computer Science and Engg. Indian Institute of Technology Madras India

Scalab.lity is an important issue in the construction of distributed systems. A number of theoretical and experimental studies have been made on scalab.lity of distributed systems. However, they have been either studies on specific technologies or have studied scalab.lity in isolation. The main conjecture of our work is that scalab.lity must be perceived along with the related issues of availab.lity, synchronization and consistency. In this context, we propose a scalab.lity model which characterizes scalab.lity as being dependent on these factors as well as the workload and faultload. The model is generic and can be used to compare scalab.lity of similar systems. We illustrate this by a comparison between NFS and AFS, two well known distributed file systems. The model is also useful in identifying scalab.lity bottlenecks in distributed systems. We have applied the model to optimize Virat, a wide-area shared object space that we have built.

关键词： distributed computer systems

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distributed wisdom: Designing a replication service for large peer-to-peer data grids

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IEEE distributed systems Online 2006年第3期7卷 25-30页

作者： Srinivas, A. Vijay Reddy, M. Venkateswara Janakiram, D. Indian Institute of Technology Madras India Distributed and Object Systems Lab. Department of Computer Science and Engineering Indian Institute of Technology Madras India Department of Computer Science and Engineering Indian Institute of Technology Madras India

Some of the key issues in building services for large scale distributed systems, realizing Vishwa, a peer-to-peer (P2P) middleware architecture for developing grid applications are discussed. Researchers are producing large amounts of scientific data and believe that distributed computations on the data must be scheduled and availab.e to a large number of scientists. It is suggested that the platform must scale up to a large number of nodes and data units in the system and must also be scalab.e geographically. A scalab.e, reconfigurable shared-object space over the two-layer architecture can be developed that incorporates mechanisms to maintain replicated data and must also provide a shared-object abstraction over a wide-area distributed system.

关键词： distributed computer systems

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