Performance Analysis of DRX Mechanism in LTE-A Networks using Markov Modeling

Prof. Dharmaraja Selvamuthu(India)

In recent years, smartphones have emerged as the basic commodity for the young generation. In today’s time, one of the major constraints for the smartphone users is short battery life, due to various features such as many applications running at the background, large display screen and high data rates. For the current generation, the network Long Term Evolution/Long Term Evolution-Advanced (LTE/LTE-A) introduced by Third Generation Partnership Project(3GPP), a power saving mechanism known as Discontinuous Reception (DRX) mechanism has been launched. Power saving and Quality of Service (QoS) are the two significant aspects of LTE-A networks. DRX is a mechanism, commonly exercised to enhance the power saving competency of a User Equipment (UE) in LTE-A networks. In this talk, based on the kind of traffic running at the UE, a new appliance will be discussed to switch the DRX mechanism from the power active state to the power saving state and vice versa. This talk will investigate this switching technique in DRX mechanism using the M[X]/G/1 vacation queue system with N-policy. The optimal value of N as well as the maximum number of DRX cycles, are computed to obtain the minimal amount of power consumption. This study concludes the selection guidelines for choosing the optimal values of N and the maximum number of DRX cycles.

About the speaker

Dharmaraja Selvamuthu avatar

Prof. Dharmaraja Selvamuthu

  • Indian Institute of Technology

S. Dharmaraja earned his B.Sc. degree in Mathematics from Presidency College, Chennai, in 1992, M.Sc. degree in Applied Mathematics from Anna University, College of Engineering, Guindy, Chennai, in 1994 and Ph.D. degree in Mathematics from the Indian Institute of Technology Madras, Chennai, in 1999. From 1999 to 2002, he was a post-doctoral fellow at the Department of Electrical and Computer Engineering, Duke University, USA. From 2002 to 2003, he was a research associate at the TRLabs, Winnipeg, Canada.

He has been with the Department of Mathematics, IIT Delhi, since 2003, where he is currently Head, Department of Mathematics from Sept. 2020 and he is a Professor, Department of Mathematics and joint faculty of Bharti School of Telecommunication Technology and Management from June 2013. He appointed as 'Jaswinder & Tarvinder Chadha Chair Professor' for teaching and research in the area of Operations Research from May 2010 to July 2015.

His research interests include applied probability, queueing theory, stochastic modeling, performance analysis of computer and communication systems and financial mathematics. He is an Associate Editor of International Journal of Communication Systems (published by Wiley) and an Associate Editor of Opsearch (published by Springer). He is co-author of a text book entitled "Introduction to Probability and Stochastic Processes with Applications" in John Wiley (US Edition, New Jersey, June 2012) and (Asian Edition, New Delhi, Jan. 2016), co-author of a text book entitled "Financial Mathematics: An Introduction" in Narosa, Nov. 2012 and co-author of a text book entitled "Introduction to Statistical Methods, Design of Experiments and Statistical Quality Control" in Springer (Asian Edition, Sept. 2018).