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Singh H.,Singhania University | Arora D.,Swami Devi Dyal Institute of Engineering and Technology | Wason A.,Hindustan Institute of Technology and Management
Optik | Year: 2012

The wavelength assignment algorithm is a method to improve the performance in respect of blocking probability and to provide cost effective communication system. In this paper, we have developed a simple mathematical model which is used for the calculation of blocking probability of an OBS network. The implementation of the proposed model has less complexity and the computation used is quite efficient. This model can be implemented on different network topologies. The validity of model is supported by simulation results. © 2012 Elsevier GmbH. All rights reserved. Source


Kaur M.,Maharishi Markandeshwar University | Pal M.,Maharishi Markandeshwar University | Wason A.,Hindustan Institute of Technology and Management
Optik | Year: 2014

The performance of GMPLS network depends upon the various parameters such as number of channels, number of sources, traffic intensity etc. In this paper we have proposed a call blocking model for mode of operation to determine the type of applications suitable for GMPLS networks. Further we have suggested a switch model for GMPLS network and developed a mathematical model for GMPLS network for call blocking probability and call holding probability. In proposed model blocking probability of the network is reduced and then the call blocking performance of the model is compared with the call holding performance. © 2013 Elsevier GmbH. Source


Monika,Rayat Bahra Institute of Engineering and Bio Technology | Wason A.,Hindustan Institute of Technology and Management | Kaler R.S.,Thapar University
Optik | Year: 2013

In this paper the design, implementation and performance analysis of four wave mixing (FWM) in optical communication system for different number of input channels is presented using various values of channel spacing. Here, all the input channels have been spaced evenly at various values like 6.25 GHz, 12.5 GHz, 25 GHz, 40 GHz, 50 GHz with the different number of channels at the input i.e. with 2, 4, 6, 8, 12 input channels. The simulation results reveal that the four wave mixing is minimum when the channel spacing is maximum i.e. 50 GHz with minimum number of channels i.e. 2 input channels. It is observed that on increasing the channel spacing, the interference between the input frequencies decreases and hence the four wave mixing also decreases. Also, on increasing the number of input channels/users, the interference between the input frequencies increases and thus, the four wave mixing also increases. © 2013 Elsevier GmbH. Source


Wason A.,Hindustan Institute of Technology and Management | Kaler R.S.,Thapar University
Optik | Year: 2013

This paper presents the mathematical models for wavelength routed WDM optical networks for optimization of blocking probability. This model works well for the networks with higher load. The proposed mathematical model is then compared with the earlier proposed mathematical model. Comparison proved that the model works better than the earlier proposed model. The value of blocking probability ranges from 0 to 10-4 in case of the proposed model whereas it lies in the range of 0-1 in earlier mathematical model. © 2012 Elsevier GmbH. All rights reserved. Source


Agarwal S.,Institute of Management Sciences | Verma A.K.,Hindustan Institute of Technology and Management | Dixit N.,Institute of Management Sciences
Proceedings of the 2014 International Conference on Issues and Challenges in Intelligent Computing Techniques, ICICT 2014 | Year: 2014

Color is one of the most important low-level features used in image retrieval and most content-based image retrievals (CBIR) systems use color as an image features. However, image retrieval using only color features often provide very unsatisfactory results because in many cases, images with similar colors do not have similar content. As the solution of this problem this paper describes a novel algorithm for Content Based Image Retrieval (CBIR) based on Color Edge Detection and Discrete Wavelet Transform (DWT). This method is different from the existing histogram based methods. The proposed algorithm generates feature vectors that combines both color and edge features. This paper also uses wavelet transform to reduce the size of the feature vector and simultaneously preserving the content details. The robustness of the system is also tested against query image alterations such as geometric deformations and noise addition etc. Wang's image database is used for experimental analysis and results are shown in terms of precision and recall. © 2014 IEEE. Source

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