Full length article: Upper and lower bounds on subcarrier collision for inter-cell interference scheduler in OFDMA-based systems: Voice traffic

Authors:
Serhan Yarkan;Koon Hoo Teo;HüSeyin Arslan;Jinyun Zhang;Khalid A. Qaraqe
Affiliations:
Department of Electrical and Computer Engineering, Texas A & M University, 301 Wisenbaker Engineering Research Center, Bizzell Street, College Station, TX, 77840, United States;Mitsubishi Electric Research Laboratories, 201 Broadway Cambridge, MA, 02139, United States;Department of Electrical Engineering, University of South Florida, 4202 E. Fowler Avenue, ENB-118, Tampa, FL, 33620, United States;Mitsubishi Electric Research Laboratories, 201 Broadway Cambridge, MA, 02139, United States;Department of Electrical and Computer Engineering, Texas A & M University at Qatar, Texas A & M Engineering Building, Education City, Doha, 23874, Qatar
Venue:
Physical Communication
Year:
2010

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Abstract

This study investigates upper and lower bounds on subcarrier collision for inter-cell interference (ICI) schedulers in orthogonal frequency division multiple access (OFDMA)-based wireless systems carrying voice traffic. It is shown that the amount of knowledge regarding the reserved resources in the neighboring cell plays a crucial role in the performance of ICI schedulers. Also, it is proven that the upper bound of subcarrier collision for ICI schedulers corresponds to the case which is driven by the absence of knowledge about the reserved resources in the neighboring cell. On the other hand, the lower bound of subcarrier collision for ICI schedulers corresponds to the case which is driven by the perfect knowledge about the reserved resources in the neighboring cell. Based on the lower bound analysis, a minimum expected number of collision scheduler is developed and its performance is investigated as well. Moreover, the impact of scheduling period on the performance of schedulers is examined. Numerical results are presented along with related discussions.