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오영진,Agassi Z. Melikov,Leonid A. Ponomarenko,김제숭 한국경영공학회 2009 한국경영공학회지 Vol.14 No.1
In this paper an approach to find the suboptimal call admission control (CAC) strategy for multi-media traffic in multiple service networks is proposed. The goal is to maximize the channel utilization. This is reduced to the problem of finding appropriate CAC in multi-rate queue in which calls of different types require random number of channels. For solving the last problem the methods of Markov decision process (MDP) theory are used. Some results of numerical experiments are presented.
Kim, HyungMan,Melikov, Agassi,Fattakhova, Mehriban,Kim, CheSoong Hindawi Limited 2012 Journal of applied mathematics (JAM) Vol.2012 No.-
<P>We develop an analytical approach to the performance analysis and optimization of wireless cellular networks for which different types of calls are prioritized based on a channel reservation scheme. We assume that the channel occupancy time differs for new and handover calls. We obtain simple formulas for calculating quality of service (QoS) metrics and solve some problems related to finding the optimal values of guard channels as well as present the results of numerical experiments.</P>
Oh, Youngjin,Kim, Chesoong,Melikov, Agassi Korean Institute of Industrial Engineers 2013 Industrial Engineeering & Management Systems Vol.12 No.3
This paper proposes a space merging approach to studying the queuing models with finite buffers and jump priorities. Upon the arrival of a call with low priority, one call of such kind is assumed to be transferred to the end of the queue of high priority calls. The transfer probabilities depend on the state of the queue of the heterogeneous calls. We developed the algorithms to calculate the quality of service metrics of such queuing models, and the results of the numerical experiments are shown.
Approximation Method for QoS Analysis of Wireless Cellular Networks with Impatient Calls
Heeyeol Eom,Chesoong Kim,Agassi Melikov,Mehriban Fattakhova 대한산업공학회 2010 Industrial Engineeering & Management Systems Vol.9 No.4
Simple-closed expressions for approximate calculation of quality of service (QoS) metrics of isolated cell of wireless networks with either finite or infinite queues of both new and handover calls are developed. It is assumed that both kinds of calls might leave the system without receiving service if their waiting times exceed some threshold value. For the models with infinite queues of heterogeneous calls easily checkable ergodicity conditions are proposed. The high accuracy of the developed approximation formulas is shown. Results of numerical experiments are given.
Numerical Approach to Analysis of Channel Assignment Schemes in Mobile Cellular Networks
Ihn Seon Ro,Agassi Z. Melikov,Leonid A. Ponomarenko,김제숭 한국경영공학회 2008 한국경영공학회지 Vol.13 No.2
Simple numerical procedures for finding QoS of a cellular network with shared reservation scheme for hand-over calls are proposed. New calls may remain in finite or infinite queue. Suggested procedures have high accuracy for micro- and macro-cells in which traffic intensities of new and hand-over calls vary greatly. Results of numerical experiments are given.
Youngjin Oh,Chesoong Kim,Agassi Melikov 대한산업공학회 2013 Industrial Engineeering & Management Systems Vol.12 No.3
This paper proposes a space merging approach to studying the queuing models with finite buffers and jump priorities. Upon the arrival of a call with low priority, one call of such kind is assumed to be transferred to the end of the queue of high priority calls. The transfer probabilities depend on the state of the queue of the heterogeneous calls. We developed the algorithms to calculate the quality of service metrics of such queuing models, and the results of the numerical experiments are shown.
Approximation Method for QoS Analysis of Wireless Cellular Networks with Impatient Calls
Eom, Hee-Yeol,Kim, Che-Soong,Melikov, Agassi,Fattakhova, Mehriban Korean Institute of Industrial Engineers 2010 Industrial Engineeering & Management Systems Vol.9 No.4
Simple-closed expressions for approximate calculation of quality of service (QoS) metrics of isolated cell of wireless networks with either finite or infinite queues of both new and handover calls are developed. It is assumed that both kinds of calls might leave the system without receiving service if their waiting times exceed some threshold value. For the models with infinite queues of heterogeneous calls easily checkable ergodicity conditions are proposed. The high accuracy of the developed approximation formulas is shown. Results of numerical experiments are given.