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Industrial and Information Systems (ICIIS), 2010 International Conference on

Date July 29 2010-Aug. 1 2010

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Displaying Results 1 - 25 of 124
  • [Front cover]

    Page(s): c1
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    Freely Available from IEEE
  • Advisory Committee

    Page(s): i - ii
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    Freely Available from IEEE
  • Core Committee

    Page(s): iii - iv
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  • list-reviewer

    Page(s): v - xi
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  • Communication and information engineering (CIE)

    Page(s): xii - xxix
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  • Performance of layered CDMA wireless sensor networks with correlated interferers in shadowed environment

    Page(s): 1 - 6
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1715 KB) |  | HTML iconHTML  

    The paper evaluates the performance of a CDMA based wireless sensor networks (WSN) with layered architecture in terms of energy consumption for successful transmission of data packets, considering only correlation among interferers in shadowed environment. We consider a model of interference at the sink for a layered architecture of CDMA based WSN with two kinds of interference, multiple access interference (MAI) and node interference (NI), considering power control error, path loss and shadowing. An energy model is considered for calculating the requirement of energy for successful delivery of information between two nodes. The effects of node density, correlation among MAI and NI interferers, power control error on BER, PER, average number of retransmission and energy consumption for successful reception between two successive nodes are investigated. Analytical results are verified through simulations. View full abstract»

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  • Hierarchically adaptive distributed fault diagnosis in mobile ad hoc networks using clustering

    Page(s): 7 - 12
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1681 KB) |  | HTML iconHTML  

    Ad hoc networking allows portable mobile devices to establish communication path without having any central infrastructure. As there is no centralized infrastructure and the mobile devices are moving randomly, this gives rise to various kinds of problems such as routing and detecting faulty mobile nodes in the network. In this paper, the problem of fault diagnosis in mobile ad hoc networks (MANETs) is considered. In fact, fault-diagnosis becomes important building block to establish dependability in MANET. An important problem in MANET is the distributed system-level diagnosis problem whose purpose is to have each fault-free mobile node to determine the state of all the mobile nodes assuming a MANET composed of N nodes that can be faulty or fault-free. This paper uses a hierarchical clustering approach proposed by authors Durate and Nanya for diagnosing nodes in mobile ad hoc networks (MANETs). The proposed diagnosis algorithm is linearly scalable under the assumption that the mobiles may be: (i) crash faulty due to out of range or physical damage and (ii) value faulty due to sending erroneous messages while operating in the field. The generic parameters such as diagnostic latency and message complexity are used for evaluating the proposed diagnosis algorithm. The result shows that diagnosis latency and message complexity is reduced as compared to non-clustering distributed diagnosis algorithm Forward Heartbeat. View full abstract»

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  • Performance analysis of distributed intermittent fault diagnosis in wireless sensor networks using clustering

    Page(s): 13 - 18
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1748 KB) |  | HTML iconHTML  

    Wireless sensor network (WSN) has become monitoring solution of variety of applications. As one of the key technologies involved in WSNs, node fault detection is indispensable in most WSN applications. Faults occurring to sensor nodes are common due to the sensor device itself and the harsh environment where the sensor nodes are deployed. The goal of this paper is to locate the faulty sensors in the wireless sensor network. In this paper, a distributed fault diagnosis (DFD) scheme using clustering is proposed which satisfies three important diagnosis properties such as consistency, completeness and accuracy. To evaluate the performance of the proposed algorithm a comparative analysis and implementation is presented in this paper using an existing diagnosis algorithm i.e. distributed fault diagnosis algorithm (DFD). View full abstract»

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  • Optimal transmit power in Wireless Sensor Networks using MRC space diversity in Rayleigh fading channel

    Page(s): 19 - 24
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1698 KB) |  | HTML iconHTML  

    In this paper a novel network architecture employing space diversity for Wireless Sensor Networks (WSN) is proposed. A simulation study has been carried out to evaluate performance of such WSN employing space diversity in terms of optimal transmit power. Optimal transmit power is the minimum power required to sustain the network connectivity while maintaining a predefined maximum tolerable Bit Error Rate (BER) in WSN. Optimization of transmit power is of great importance in WSN since sensor nodes are battery driven and optimization helps to increase battery life by reducing inter node interference significantly. The impact of Maximal Ratio Combining (MRC) based space diversity on optimal transmit power is investigated in presence of Rayleigh fading. Use of MRC space diversity in Rayleigh fading channel shows a significant reduction in optimal common transmit power. Average number of retransmissions for successful delivery of a packet is also evaluated considering an infinite Automatic Repeat Request (ARQ) scheme. View full abstract»

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  • A wideband RF frontend architecture for software defined radio

    Page(s): 25 - 30
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    This paper presents an RF frontend architecture for wideband software defined radio to function in 400 MHz to 3.5 GHz frequency range. In wideband frontends, devices with high linearity are used to lower the level of IM products. There are different front-end architectures available for catering to wideband operation. However, some of these, particularly the wideband ones suffer with IM problem. This paper presents a partitioning mechanism that uses multiple medium bands to limit the IM problem. The proposed frequency partitioning scheme makes it possible to suppress IM products further for frontend using devices of given linearity. Thus this helps in achieving better performance along with relaxing the linearity requirement of devices. View full abstract»

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  • Towards energy efficient protocols for wireless body area networks

    Page(s): 31 - 34
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1741 KB) |  | HTML iconHTML  

    The major medium access control (MAC) layer protocol design challenges for wireless body area network (WBAN) involve Quality of Service assurance for high reliability and guaranteed latency requirement for real time data, especially vital signs that needs a deterministic structure with special care for emergency reaction alarm; flexibility since it must support various types (periodic, non-periodic, medical, entertainment) of traffic/data rate and importantly, energy efficiency, since energy consumption especially for implanted device must be limited. These requirements necessitate design of efficient active/inactive scheduling. This paper evaluates the needs and performance of energy efficient MAC protocols proposed for wireless body area networks. View full abstract»

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  • Energy level performance of multihop wireless sensor networks with correlated interferers

    Page(s): 35 - 40
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1729 KB) |  | HTML iconHTML  

    This paper evaluates the end-to-end performance of a CDMA based static multi-hop wireless sensor network (WSN) in shadowed environment. An interference model for multi-hop is presented using correlated interferers. Three different information delivery mechanisms are studied using regenerative relays with or without error correction capability. Energy requirement for successful delivery of a data packet for each mechanism is evaluated and compared under several conditions of node density, shadowing, correlation, power control error, packet length, and number of hops. The effects of node density, correlation amongst interferers, power control error (pce) and number of hops on over all BER are also investigated. Analytical results are supported by simulation. View full abstract»

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  • Solving large problem instances of the RWA problem using Genetic Algorithms

    Page(s): 41 - 46
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1775 KB) |  | HTML iconHTML  

    This research work focuses on Integer Linear Programming (ILP) formulations for the Routing and Wavelength Assignment (RWA) problem in Wavelength Division Multiplexed (WDM) networks where end-users communicate with each other by establishing all-optical, non-interfering wavelength channels which are referred as lightpaths. The RWA problem is reducible to Graph Coloring problem in polynomial time and hence found to be NP-Complete. So, Soft Computing techniques along with Heuristic methods are applicable to solve large instances of the RWA problem. In this work, we propose new ILP formulations by imposing additional constraints to the objective function, thereby, establishing lightpaths which are immune to signal distortion and crosstalk. Furthermore, we develop constraints to make the lightpaths avoid creating loops while traversing between the Source-Destination node pair. After modeling the RWA problem as an Optimization problem, we focus on applying Genetic Algorithms (GA) to find a sub-optimal solution for the RWA problem. View full abstract»

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  • Analysis of multimode plastic optical fiber as a cost effective transmission medium

    Page(s): 47 - 50
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1622 KB) |  | HTML iconHTML  

    Study on a multimode plastic optical fiber as a cost effective alternative for expensive glass fiber is presented. An analysis of PMMA (Polymethylmetacrylate) and PFBVE (Perfluoro-butenylvinylether) plastic fibers was carried out in order to evaluate their characteristics and to evaluate their capability to be used in some specific applications. Based upon the results, two copper to fiber media converters for RS232 and E1 standards, which support the characteristics of the considered media, were developed. These converters address very effectively for converting electrical signals to optical plastic fiber medium. The results reveal that these optical fiber converters function very satisfactorily and prove its usability in an effective and low cost manner in data communication ranging up to the maximum possible bit rate. These media converters can overwhelm the existing media converters due to their low cost, high reliability, simplicity, ability to plug and play, reduction of delays and reduction of size. View full abstract»

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  • Refractive index of drifting ionized plasma with variable electron collision frequency in the Earth's upper atmosphere

    Page(s): 51 - 55
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    The refractive index of an ionized medium in a magnetic field is complex. The formula for the refractive index is the cornerstone of the theory useful to establish the background study for radio wave propagation in uniform magneto-plasma. In the present paper, the expression for refractive index have been derived by considering Ionosphere as an anisotropic media with a constant drift so that it could be applied to any type of irregularities observed in the ionosphere. The formula has been derived taking variation in electron collision frequency with electron speed in drifting plasma. This expression is useful and helps to study the propagation characteristics of drifting plasma. The relativistic drift velocities of the plasma, generally reached by astrophysical plasma, will change the refractive index of the plasma considerably for example during re-entry of space vehicle in earth's atmosphere, the creation of high density plasma medium affects the radiated signal from the space craft. The medium of upper atmosphere gets affected under this condition. View full abstract»

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  • Comparative study of spectral responce of etched single mode fiber with acoustic wave input and etched high-birefringence fibre loop mirror sensor

    Page(s): 56 - 59
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    In this paper, the transmission characteristics of unetched and etched single mode fibers with acoustic wave input is investigated where the cladding layer of a single mode fibre is reduced. In other part transmission characteristics of high birefringence (Hi-Bi) fiber loop mirrors with etched and unetched fiber has also been demonstrated. In optical sensing, these devices may be used as strain and temperature sensors, in a separate or in a simultaneous measurement. In the end the two results have been compared. View full abstract»

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  • Design of broadband patch antennas using genetic algorithm optimization

    Page(s): 60 - 65
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1833 KB) |  | HTML iconHTML  

    Patch antennas are cheap, simple, robust, inexpensive and compatible with MMIC designs. But the narrow bandwidth and low efficiency are the major drawbacks. Nowadays, the patch antenna is a widely used antenna type in many applications such as cellular phones, pagers, satellite communication and missiles. In this research, Genetic Algorithm optimization (GAO) method is used to design the shape of the patch, thickness of the dielectric substrate and the permittivity of the substrate in order to optimize the bandwidth performance and gain of center feed patch antennas. It is found that thin broadband fragmented single probe feed patch antennas with fractional bandwidths up to 51% can be easily designed using GAO. View full abstract»

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  • A study on the effect of a wall in an indoor communication link

    Page(s): 66 - 68
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1674 KB) |  | HTML iconHTML  

    This paper presents short-range signal propagation simulation at 1GHz for communication applications in an indoor environment. The objective of the paper is to study the effect on the signal propagation with the varying thickness of a wall in an indoor communication link. By placing the transmitter antenna and receiver antenna on either side of the wall, blockage effect of the dielectric slab has been estimated by varying the thickness of the wall. The wall is centrally placed between transmitter and receiver. The distance between the wall and the antennas are kept constant at 2λ. The thickness of the wall is varied from 1λ to 2λ respectively. The results are obtained through simulation by using Ansoft HFSS. View full abstract»

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  • Neural network architectures for time-varying direction-of-arrival estimation

    Page(s): 69 - 74
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    Estimating fixed directions-of-arrival of signals has generally been the objective in the literature. In this paper, however, we are concerned with time-varying directions-of-arrival. We propose here two different architectures of neural networks (feedforward and radial basis function networks) to estimate time-varying directions-of-arrival of signals. These networks are more amenable for hardware implementation compared to the conventional super-resolution techniques. The objective is to use these estimated directions to extract the signals. We demonstrate that neural networks of low complexity achieve our purpose, and the overall system sufficiently robust to account for the inaccuracies in the estimation of directions. View full abstract»

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  • A stacked ring-patch artificial substrate for surface waves suppression and in phase reflection

    Page(s): 75 - 79
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1786 KB) |  | HTML iconHTML  

    In this paper, a stacked ring-patch two layer planar artificial substrate is analyzed numerically and is shown to possess the properties of a high impedance surfaces (HIS). Its properties are evaluated by investigating the surface wave propagation and plane wave reflection characteristics. Its application to reduce the mutual coupling of microstrip antennas is investigated by the FDTD simulations. Experimental measurements using a pair of monopoles are used to confirm the surface waves suppression band. One of the main advantages of the proposed geometry is that it is simple and planar in nature, without the need for any via connections across dielectric layers and thus can be realized by planar technologies. Second one, it exhibits over lapped surface wave suppression and in-phase reflection bands. Also it can be scalable to operate in different frequency range. View full abstract»

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  • Routing misbehavior detection and reaction in MANETs

    Page(s): 80 - 85
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    Traditionally, routing protocols for mobile ad-hoc networks (MANETs) assume a safe and a cooperative network setting. In practice, there may be malicious nodes attempt to disrupt the network communication by launching attacks on the routing protocol itself. Protecting the route from malicious attacks is an important yet challenging security issue in mobile ad hoc networks. In this paper, we proposed challenged node technique is to detect and react on the adversary nodes at the route discovery phase. In challenged node technique, any intermediate node new route reply verifies with next hop node challenged replay by its mitigate neighborhood nodes. In essence, new route replay verification algorithm describe about how efficiently it detects the malicious node at route discovery process. Eventually our simulation results are shown that challenged node technique has better malicious node detection probability and packet delivery ratio than existing technique. View full abstract»

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  • Optimal network selection algorithm for heterogeneous wireless networks

    Page(s): 86 - 91
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    Future wireless network must be able to coordinate services within a diverse network environment. One of the challenging problems for coordination is the selection of optimal network depending upon the type of demanding application. There are different types of Internet applications and network interfaces. The quality of service requirement varies from one application to another. The present work considers the integration of three networks, GPRS, IEEE 802.11x and WiMAX. The proposed scheme uses network selection module to select network dynamically depending upon the application type. It also uses a traffic distribution module to distribute the applications dynamically among the various routes within a network. The traffic distribution module also detects the fast handoff mobile nodes and triggers vertical handoff for such mobile nodes to a network having high data rate to prevent their further handoff. This module also calculates network performance parameters and application blocking probability of the network. It also sends the network performance parameters and application blocking probability to network selection module. The network selection module uses the network performance parameters to execute the network selection algorithm and application blocking probability of each network to determine the user satisfaction. The performance of the proposed scheme is evaluated on the basis of network usage, application blocking probability and user satisfaction. View full abstract»

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  • Transmission rate prediction for Cognitive Radio using Adaptive Neural Fuzzy Inference System

    Page(s): 92 - 97
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1787 KB) |  | HTML iconHTML  

    Advances in applications demanding high data rate wireless applications and existing wireless system upgrading has lead to scarcity in spectrum. Unlicensed new technologies like Digital video broadcast (DVB), Digital audio broadcast (DAB), internet, WiMAX etc. launched recently are reaching thousands of customers at rapid speed. Most of the primary spectrum is assigned, so it is becoming very difficult to find spectrum for either new services or expanding existing infrastructure. Present government policies do not allow unlicensed access of licensed spectrum, constraining them instead to heavily populated, interference-prone frequency bands. Cognitive Radio systems promise to handle this situation by utilizing intelligent software packages that enrich their transceiver with radio-awareness, adaptability and capability to learn. In this paper, we present the working of the fifth generation intelligent radio that is Cognitive Radio (CR) system which works on predictive data rate and propose ANFIS based learning scheme to introduce intelligence in it. The performance of this is seen to be comparable to neural network based scheme with reduced complexity. View full abstract»

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  • Stability based Route Repairing Algorithm for Ad Hoc On- Demand Distance Vector Routing

    Page(s): 98 - 101
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    AODV On-demand routing protocol is widely deployed in Ad Hoc networks, but it has some drawbacks. This paper proposes to modify the AODV protocol called AODVSRR algorithm. By calculating the route stability process to the RREQ message and the route repair mechanism to the RREQ message, the new protocol not only reduces the packet loss rate and the end-to-end latency, but also enhances the utilization rate of the network resources. Finally, we analyze the performance through simulation. View full abstract»

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  • A heuristic for QoS based independent task scheduling in Grid environment

    Page(s): 102 - 106
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    Task scheduling in Grid becomes more complicated when user demands different QoS. In this paper, we have proposed QoS Guided Weighted Mean Time Min-Min Max-Min Selective heuristic for QoS based task scheduling. The heuristic takes single QoS parameter as requirements of tasks for deciding the match between resources and tasks. The heuristic also considers the performance of resources for scheduling. We have evaluated the heuristic in GridSim, for different task scenarios. The results are obtained and compared with other heuristics like Min-Min, Max-Min, QoS Guided Min-Min, Weighted Mean Time Min-Min Max-Min Selective. The results of the proposed heuristic are better for makespan, resource utilization and resource load balancing than other above mentioned heuristics. View full abstract»

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