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Parallel cluster formation for secured communication in wireless ad hoc networks

Parallel cluster formation for secured communication in wire...

引用

2004 12th IEEE International Conference on Networks, ICON 2004 - Unity in Diversity

作者： Shah, Vivek Deng, Hongmei Agrawal, Dharma P. OBR Research Center for Distributed and Mobile Computing University of Cincinnati Cincinnati OH 45221-0030 United States

ISBN: (纸本)078038783X

Routing protocols in wireless ad hoc network are highly insecure and prone to various attacks owing to its inherent characteristics of open medium, dynamically changing topologies and distributed cooperation between the member nodes. Having a secure routing protocol in wireless ad hoc networks appears to be a problem that is not trivial to solve. In this paper we mainly consider the vulnerabilities of Cluster Based Routing Protocol (CBRP), which uses formation of clusters with a single cluster head. In CBRP, cluster head has the responsibility of maintaining the cluster member list, routing the packets from the cluster members and can also be a certification authority (CA) for distribution of certificates. However a single cluster head in CBRP can be a single point of failure and can also become malicious or selfish and as a result the whole system can become paralyzed. We propose a scheme and algorithm in which we distribute the cluster head service to a group of cluster heads called Council. Each Council node will have equal functionality and utilize the (k, n) threshold secret sharing scheme for performing the cluster head functionality. One of the main functionality of Council will be key distribution. A certificate will be formed by participation of at least k nodes out of n Council member. The cluster head functionality will now be able to work even when more than one (but limited to min {k, n-k+1}) cluster heads are compromised. Simulation results of our proposed algorithm for formation of such Council based clusters demonstrates that our scheme is more fault tolerant and efficient than CBRP. © 2004 IEEE.

关键词： Security of data

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A novel distributed resource-aware scalable scheme for scatternet formation

A novel distributed resource-aware scalable scheme for scatt...

引用

11th IEEE International Conference on Networks, ICON 2003

作者： Dharia, Sagar I. Agrawal, Dharma P. OBR Research Center for Distributed and Mobile Computing ECECS University of Cincinnati Cincinnati OH 45221-0030 United States

ISBN: (纸本)0780377885

Bluetooth is a low-power, low-cost, short-range wireless communication system. In a Bluetooth ad hoc network, up to eight Bluetooth devices can communicate with each other in a special network called piconet. Scatternet can be formed by interconnecting piconets. In this paper, we present a distributed resource aware scalable scatternet formation algorithm. Though the proposed algorithm has two phases, it is not necessary that all the nodes be in the same phase at a given instant of time. The formed scatternet has the following properties: 1. All the devices may not be necessarily in each other's transmission range. 2. Any device will be a member of at the most two piconets. 3. Higher resource-weighted devices are preferred over lower resource-weighted devices to perform the role of a master and/or a bridge. 4. Slave/Slave bridges are preferred over Master/Slave bridges. Extensive simulations have shown that the number of messages transmitted by low resource-weighted devices are significantly lesser than the number of messages exchanged by high resource-weighted devices, and the number of master/slave bridges are remarkably less as compared to the number of slave/slave bridges. The overall message complexity of the algorithm is O(n). ©2003 IEEE.

关键词： Bluetooth

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Data-Centric Attribute Allocation and Retrieval (DCAAR) scheme for wireless sensor networks

Data-Centric Attribute Allocation and Retrieval (DCAAR) sche...

引用

2nd IEEE International Conference on mobile Ad-hoc and Sensor Systems, MASS 2005

作者： Biswas, Ratnabali Chowdhury, Kaushik Agrawal, Dharma P. OBR Research Center for Distributed and Mobile Computing Dept. of ECECS University of Cincinnati Cincinnati OH 45221-0030

ISBN: (纸本)0780394666

Wireless sensor networks have enabled information gathering from a large geographical region and present unprecedented opportunities for a broad spectrum of monitoring applications. In this paper, we propose a data-centric storage scheme to determine a distribution of attributes over a large-scale sensor network such that the cost of retrieving data is minimized. We analytically determine the conditions under which the proposed architecture is beneficial and present simulation results to demonstrate the same. To the best of our knowledge, this is the first attempt to determine an allocation of attributes over a sensor network based on the correlations between attributes. © 2005 IEEE.

关键词： Resource allocation

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Attribute allocation and retrieval scheme for large-scale sensor networks

Attribute allocation and retrieval scheme for large-scale se...

引用

作者： Biswas, Ratnabali Chowdhury, Kaushik Agrawal, Dharma P. OBR Research Center for Distributed and Mobile Computing Department of ECECS University of Cincinnati Cincinnati OH 45221-0030 United States

Wireless sensor network is an emerging technology that enables remote monitoring of large geographical regions. In this paper, we address the problem of distributing attributes over such a large-scale sensor network so that the cost of data retrieval is minimized. The proposed scheme is a data-centric storage scheme where the attributes are distributed over the network depending on the correlations between them. The problem addressed here is similar to the Allocation Problem of distributed databases. In this paper, we have defined the Allocation Problem in the context of sensor networks and have proposed a scheme for finding a good distribution of attributes to the sensor network. We also propose an architecture for query processing given such a distribution of attributes. We analytically determine the conditions under which the proposed architecture is beneficial and present simulation results to demonstrate the same. To the best of our knowledge, this is the first attempt to determine an allocation of attributes over a sensor network based on the correlations between attributes. © Springer Science+Business Media, LLC 2006.

关键词： Wireless telecommunication systems

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IEEE 802.11 DCF based MAC protocols for multiple beam antennas and their limitations

IEEE 802.11 DCF based MAC protocols for multiple beam antenn...

引用

2nd IEEE International Conference on mobile Ad-hoc and Sensor Systems, MASS 2005

作者： Jain, Vivek Gupta, Anurag Lalf, Dhananjay Agrawal, Dharma P. OBR Center for Distributed and Mobile Computing Department of ECECS University of Cincinnati Research and Technology Center Robert Bosch Corporation

ISBN: (纸本)0780394666

Multiple beam antennas can receive (or transmit) data on multiple beams simultaneously. The aim of this paper is to show the limitations of using IEEE 802.11 distributed coordination function (DCF) based schemes for medium access control (MAC) in such antennas. We provide four different variants of IEEE 802.11 DCF based on-demand protocols to study this phenomenon. Our simulation results and analyses emphasize the need to develop a novel MAC protocol to fully exploit the capabilities of multiple beam antennas. We further provide some embryonic guidelines for the development of such a protocol. © 2005 IEEE.

关键词： Network protocols

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Energy aware routing for spatio-temporal queries in sensor networks

Energy aware routing for spatio-temporal queries in sensor n...

引用

2005 IEEE Wireless Communications and Networking Conference, WCNC 2005: Broadband Wirelss for the Masses - Ready for Take-off

作者： Jain, Neha Biswas, Ratnabali Nandiraju, Nagesh Agrawal, Dharma P. OBR Research Center for Distributed and Mobile Computing ECECS Department University of Cincinnati Cincinnati OH 45221-0030 United States

ISBN: (纸本)0780389662

Wireless sensor networks is an emerging technology that can significantly improve the quality of spatio-temporal data monitoring because of their untethered operation and potential for large scale deployment. In this paper, we define a communication architecture that supports distributed query processing to evaluate spatio-temporal queries within the network. We represent these queries by query trees and distribute query operators to appropriate sensor nodes. As operator execution demands high computation capability, we propose use of a heterogenous sensor network where query operators are assigned to sparsely deployed resource-rich nodes within a dense network of low power sensor nodes. We design an adaptive, decentralized, low communication overhead algorithm to determine an operator placement on the resource-rich nodes in the network to minimize cost of transmitting data along a routing tree constructed to continuously retrieve data at the sink, from a set of spatially distributed geographical regions. To the best of our knowledge, this is the first attempt to build an energy aware routing infrastructure to enable in-network processing of spatio-temporal queries. © 2005 IEEE.

关键词： Routers

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A cross layer MAC with explicit synchronization through intelligent feedback for multiple beam antennas

A cross layer MAC with explicit synchronization through inte...

引用

GLOBECOM'05: IEEE Global Telecommunications Conference, 2005

作者： Jain, Vivek Gupta, Anurag Lal, Dhananjay Agrawal, Dharma P. OBR Center for Distributed and Mobile Computing Department of ECECS University of Cincinnati Research and Technology Center Robert Bosch Corporation

ISBN: (纸本)0780394143

This paper introduces a novel cross layer medium access control protocol for multiple beam antennas to fully utilize their multiple-beam-forming capability. Our protocol, Explicit Synchronization via Intelligent Feedback (ESIF), uses feedback from neighboring nodes to synchronize data communication at multiple beams. ESIF exploits routing information to guarantee long-term fairness and minimize the energy and latency overheads. Unlike previous works on directional antennas that discuss range extension, we focus on optimal spatial reuse. Simulation results demonstrate that ESIF outperforms other ondemand access schemes based on IEEE 802.11 DCF for multiple beam antennas.

关键词： Antenna arrays

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Exploiting multi path routing to achieve service differentiation in sensor networks

Exploiting multi path routing to achieve service differentia...

引用

11th IEEE International Conference on Networks, ICON 2003

作者： Jain, Neha Madathil, Dilip K. Agrawal, Dharma P. OBR Research Center for Distributed and Mobile Computing ECECS Department University of Cincinnati Cincinnati OH 45221-0030 United States

ISBN: (纸本)0780377885

Limited battery life of the nodes in a sensor network, has encouraged optimization of resources so as to maximize network lifetime. When network resources are scarce, satisfying user requirements without sacrificing network performance becomes a challenging problem. In this paper, we address this by using a novel service differentiation approach and use mutipath routing, to provide prioritized treatment to time critical applications in a distributed, energy-efficient and scalable manner. We utilize our multipath routing protocol primarily designed for load balancing and enhance its usefulness by exploring the use of resource reservation in achieving Quality of Service aware multipath routing. We are able to provide a reduced response time to critical queries without adversely affecting the network lifetime. ©2003 IEEE.

关键词： Quality of service

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Attribute allocation in large scale sensor networks 05

Attribute allocation in large scale sensor networks

引用

2nd International Workshop on Data Management for Sensor Networks, DMSN 2005, Held in Conjunction with Very Large Data Bases

作者： Biswas, Ratnabali Chowdhury, Kaushik Agrawal, Dharma P. OBR Research Center for Distributed and Mobile Computing Dept. of ECECS University of Cincinnati Cincinnati OH 45221-0030 United States

ISBN: (纸本)1595932062

Wireless sensor network is an emerging technology that enables remote monitoring of large geographical regions. In this paper, we address the problem of distributing attributes over such a large-scale sensor network so that the cost of data retrieval is minimized. The proposed scheme is a data-centric storage scheme where the attributes are distributed over the network depending on the correlations between them. The problem addressed here is similar to the Allocation Problem of distributed databases. In this paper, we have defined the Allocation Problem in the context of sensor networks and have proposed a scheme for finding a good distribution of attributes to the sensor network. We also propose an architecture for query processing given such a distribution of attributes. Finally, we present simulations results to illustrate the conditions under which our proposed architecture is beneficial. To the best of our knowledge, this is the first attempt to study the attribute allocation problem of distributed databases in the context of sensor networks. Copyright 2005 ACM.

关键词： Geographical regions

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The deafness problems and solutions in wireless ad hoc networks using directional antennas

The deafness problems and solutions in wireless ad hoc netwo...

引用

IEEE Global Telecommunications Conference Workshops, GLOBECOM 2004

作者： Gossain, Hrishikesh Cordeiro, Carlos Cavalcanti, Dave Agrawal, Dharma P. OBR Center for Distributed and Mobile Computing Department of ECECS University of Cincinnati Cincinnati OH 45221-0030 Nokia Research Center Networking Technologies Lab. Tampere Finland

This paper addresses the issue of deafness in directional antennas for wireless ad hoc networks. Deafness is caused when a node X repeatedly attempts to communicate with node Y but is unsuccessful, because Y is presently tuned to some other antenna beam. In this paper, we first outline different factors which contribute to such deafness in directional antennas and its significant impact on network performance. We then propose two schemes to overcome deafness scenarios which are transparent to the underlying directional MAC protocol in use. In addition, we also claim that IEEE 802.11 Short Retry Limit (SRL) needs a special handling in directional environment because of the presence of deafness. We have done a detailed performance evaluation of our schemes with different directional MAC protocols running over switched beam antennas and the initial results are found to be very promising. © 2004 IEEE.

关键词： Wireless telecommunication systems

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