Power control for soft fractional frequency reuse in OFDMA system

Authors:
Young Min Kwon;Ok Kyung Lee;Ju Yong Lee;Min Young Chung
Affiliations:
School of Information and Communication Engineering, Sungkyunkwan University, Suwon, Kyunggi-do, Korea;School of Information and Communication Engineering, Sungkyunkwan University, Suwon, Kyunggi-do, Korea;School of Information and Communication Engineering, Sungkyunkwan University, Suwon, Kyunggi-do, Korea;School of Information and Communication Engineering, Sungkyunkwan University, Suwon, Kyunggi-do, Korea
Venue:
ICCSA'10 Proceedings of the 2010 international conference on Computational Science and Its Applications - Volume Part III
Year:
2010

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Abstract

In this paper, soft Fractional Frequency Reuse (FFR) is considered to reduce the co-channel interference and also guarantee the cell edge users data rate. We apply power control in soft FFR and investigate the system performance. Soft FFR divides whole frequency band into multiple subbands with different kinds of transmission power levels and allocates subband according to SINR of cell users. By controlling allocated powers, we can increase the frequency efficiency by using the whole frequency band and also improve the data rate for the cell edge users remarkably by reducing the co-channel interference. If the throughput requirement for the outer region is small, we decrease the power allocated to the outer region which can save power energy while high overall system throughput is achieved.