The International Arab Journal of Information Technology (IAJIT)


Capacity Enhancement Based on Dynamically

Orthogonal Frequency Division Multiplexing (OFDM) with dynamic scheduling and resource allocation is a key component of most emerging broadband wireless access networks such as Worldwide Interoperability for Microwave Access (WiMAX) and Long Term Evolution (LTE). Resource allocation mechanisms in LTE are very critical issues, because scheduling algorithms have the main responsibility for determining how to allocate radio resources for different users. In this paper a dynamically adapted Proportional Fair (PF) scheduling algorithm for capacity enhancement of LTE system is proposed. Performance comparison with the conventional PF downlink scheduler, which is characterized by high fairness but with low throughput, and the Best-Channel Quality Indicator( Best-CQI) scheduling algorithm which is characterized by high throughput but with poor fairness performance is presented. Simulation results show that the proposed algorithm enhances the overall system capacity and also provides fairness in the distribution of the resources. The proposed algorithm improves the average cell throughput by more than 31 %, with a slight degradation in the fairness level as compared with the conventional Proportional Fair PF scheduling algorithm.

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[37] Yaacoub E., Performance Study of the Implementation of Green Communications in LTE Networks, in Proceedings of 19th International Conference on Telecommunications, Jounieh, pp. 1-5, 2012. Mohammed Abd-Elnaby received the B.S., M.S., and Ph.D. degrees in electronic engineering from Menofia University, Menouf, Egypt in 2000, 2004 and 2010, respectively. Currently, he is working as Associate Professor at the Department of Electronics and Electrical Communication, Faculty of Electronic Engineering, Menofia University, Menouf, Egypt. His research interests include wireless networks, mobile communication systems, wireless resource management, MAC protocols, cognitive radio, and cooperative communication. Mohamad Elhadad received the B. Sc. and M. Sc. degrees in Electrical Engineering from Menoufia University, Egypt in 2003 and 2011,respectively. He worked as a transmission engineer in Telecom Egypt. He is currently working towards the Ph.D. degree in Communications Engineering from the Menoufia University. His areas of interests are mobile communications, digital signal processing and optical fiber networks. El-Sayed El-Rabaie involved now in Different Research Areas including CAD of Nonlinear Microwave Circuits, Nanotechnology, Digital Communication Systems, and Digital Image Processing. He Has Authored and Co-authored of More Than 270 Papers and Eighteen Books. He was Awarded several Awards (Salah Amer Award of Electronics in 1993, The Best Researcher on (CAD) from Menoufia University in 1995). He acts as a reviewer and member of the editorial board for several scientific journals. He Has Shared in Translating the First Part of the Arabic Encyclopedia. Professor EL-Rabaie was the Head of the Electronic and Communication Engineering Dept., Faculty of Electronic Engineering, Menoufia University, then the Vice Dean of Postgraduate Studies and Research in the same Faculty. Now he is Member of the Electronic and Communication Eng. Promotion Committee and Reviewer of Quality Assurance and Accreditation of Egyptian Higher Education. e-mail;- , Mobile:- 0128498170.