QoS Based Capacity Enhancement for WCDMA Network with Coding Scheme

The wide-band code division multiple access (WCDMA) based 3G and beyond cellular mobile wireless networks are expected to provide a diverse range of multimedia services to mobile users with guaranteed quality of service (QoS). To serve diverse quality of service requirements of these networks it necessitates new radio resource management strategies for effective utilization of network resources with coding schemes. Call admission control (CAC) is a significant component in wireless networks to guarantee quality of service requirements and also to enhance the network resilience. In this paper capacity enhancement for WCDMA network with convolutional coding scheme is discussed and compared with block code and without coding scheme to achieve a better balance between resource utilization and quality of service provisioning. The model of this network is valid for the real-time (RT) and non-real-time (NRT) services having different data rate. Simulation results demonstrate the effectiveness of the network using convolutional code in terms of capacity enhancement and QoS of the voice and video services.Comment: 10 Pages, VLSICS Journa

Batch arrival bulk service queue with unreliable server, second optional service, two different vacations and restricted admissibility policy

This paper is concerned with batch arrival queue with an additional second optional service to a batch of customers with dissimilar service rate where the idea of restricted admissibility of arriving batch of customers is also introduced. The server may take two different vacations (i) Emergency vacation-during service the server may go for vacation to an emergency call and after completion of the vacation, the server continues the remaining service to a batch of customers. (ii) Bernoulli vacation-after completion of first essential or second optional service, the server may take a vacation or may remain in the system to serve the next unit, if any. While the server is functioning with first essential or second optional service, it may break off for a short period of time. As a result of breakdown, a batch of customers, either in first essential or second optional service is interrupted. The service channel will be sent to repair process immediately. The repair process presumed to be general distribution. Here, we assumed that the customers just being served before server breakdown wait for the server to complete its remaining service after the completion of the repair process. We derived the queue size distribution at a random epoch and at a departure epoch under the steady state condition. Moreover, various system performance measures, the mean queue size and the average waiting time in the queue have been obtained explicitly. Some particular cases and special cases are determined. A numerical result is also introduced

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Existence of Nonoscillatory Solutions of First Order Nonlinear Neutral Dierence Equations

In this paper, we discuss the existence of nonoscillatory solutions of first order nonlinear neutral difference equations of the form We use the Knaster-Tarski xed point theorem to obtain some sucient conditions for the existence of nonoscillatory solutions of above equations. Example are given to illustrate the main results

Oscillatory and Asymptotic Behavior of Third Order Half-linear Neutral Dierential Equation with \Maxima"

In this paper we study the oscillation and asymptotic behavior of the third orderneutral dierential equation with \maxima" of the formwhere is the quotient of odd positive integers. Some examples are given toillustrate the main results

Mesoporous aluminoborates

Hexagonal, cubic and lamellar aluminoborate mesophases containing octahedral aluminium and tetrahedral boron are prepared and characterized for the first time

Oscillatory Behavior of Even Order Quasilinear Delay Difference Equations

In this paper, we consider the quasilinear delay difference equation of the form and obtained sufficient conditions for the oscillation for all solutions. Example are given to illustrate the main results

Yolk and copper utilisation during embryogenesis of the freshwater prawnCaridina nilotica

Yolk and copper utilisation during embryogenesis of the fresh-water prawnCaridina nilotica var.bengalensis (De Man) have been described. The egg number/brood increased with increase in length as well as volume (L8) of the mother animal. The water content increased from 61·3% (I stage) to 76·4% (III stage) as development proceeded. Fat appeared to be the major source of energy for embryonic metabolism. During development 28·4µg of dry substance were utilised for embryonic metabolism. The pattern of copper absorption followed the trend of salt absorption

Fisheries economics research and education in India: an overview

The food security problem in India has been alarming due to the rapid growth of population and the reduction of the per capita land. The current scientific, economic, environment and social trends are forcing farmers and policy makers to look for alternatives to fulfill the nutritional requirement for the growing population. Fish with an average of 18- 21 percent protein can be the best alternative in this context. Fisheries sector have been playing an important role in the national economy through improved food supply, employment and income. During 1998-99, fisheries sector contributed Rs.22,223 crores to the total Gross Domestic product (GOP), forming 1.4% of the total

Electronic Properties and Vibratational Analysis of Synthesized g-C3N4 nanoparticles using Density Functional Theory

In the present work, Polymeric metal free Graphitic carbon nitride (g-C3N4) nano particle was synthesized by thermal pyrolysis method without any additives or surfactants. XRD and SEM micrographs clearly show the formation of hexagonal phase of the as prepared g-CN nanoparticles. Calculated FT-IR, FT-Raman and UV-Vis spectra of the g-CN have been analyzed. HOMO LUMO and density of states of the title compound were calculated by density functional theory. Hyper polarizability of the graphitic carbon nitride was calculated by Hartee Fock and density functional method at 6-31G (d,p) basis set. The Natural bonding orbital of graphitic carbon nitride were analysed.Â