Multi-Cell Uplink Interference Management: A Distributed Power Control Method
HU Huimin1,2, LIU Yuan1,2, GE Yiyang1,2, WEI Ning3,4, XIONG Ke1,2
(1 School of Computer and Information Technology, Beijing Jiaotong University, Beijing 100044, China;
2 Beijing Key Laboratory of Traffic Data Analysis and Mining, Beijing 100044, China;
3 ZTE Corporation, Shenzhen 518057, China;
4 State Key Laboratory of Mobile Network and Mobile Multimedia Technology, Shenzhen 518055, China)
This paper investigates a multi-cell uplink network, where the orthogonal frequency division multiplexing (OFDM) protocol is considered to mitigate the intra-cell interference. An optimization problem is formulated to maximize the user supporting ratio for the uplink multi-cell system by optimizing the transmit power. Different from the traditional work, this paper adopts the user supporting ratio as the main performance metric. Our goal is to improve the user supporting ratio of each cell. Since the formulated optimization problem is non-convex, it cannot be solved by using traditional convex-based optimization methods. Thus, a distributed method with low complexity and a small amount of multi-cell interaction is proposed. Numerical results show that a notable performance gain achieved by our proposed scheme compared with the traditional one is without inter-cell interaction.
uplink interference; multi-cell uplink network; non-cooperative game; interactive scheme