A Modified Power Control Scheme in OFDMA Uplink

Author

Li, Zhongnian ; Jiang, Zheng ; Wang, Yafeng ; Yang, Dacheng

Author_Institution

Wireless Theor. & Technol. Lab. (WT&T), Beijing Univ. of Posts & Telecommun., Beijing

fYear

2008

fDate

12-14 Oct. 2008

Firstpage

1

Lastpage

5

Abstract

In OFDMA cellular system, the inter-cell interference is the dominating interference of the system, which greatly degrades the system performance, especially for the user at cell edge. The power control in uplink is an effective method to control the inter-cell interference. In this paper, we propose a modified uplink power control scheme utilizing the path loss difference between the serving cell and strongest neighbor cell without any additional signaling. The proposed power control scheme can provide a better tradeoff between average throughput and the cell edge throughput. Besides, it can make interference over thermal (IoT) more steady compared to the conventional fractional power control scheme. Simulation results show that the proposed power control scheme has 10% gain at a specific IoT operating point.

Keywords

OFDM modulation; cellular radio; power control; radiofrequency interference; telecommunication control; OFDMA cellular system; OFDMA uplink; average throughput; cell edge throughput; intercell interference; interference over thermal; modified power control scheme; path loss difference; 3G mobile communication; Degradation; Fading; Interference; Multiaccess communication; OFDM; Power control; Scheduling; System performance; Throughput;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications, Networking and Mobile Computing, 2008. WiCOM '08. 4th International Conference on

Conference_Location

Dalian

Print_ISBN

978-1-4244-2107-7

Electronic_ISBN

978-1-4244-2108-4

Type

conf

DOI

10.1109/WiCom.2008.189

Filename

4678098