Interference-Aware Power Control for Relay-Enhanced Multicell Networks

Xiaoyan HUANG  Yuming MAO  Supeng LENG  Yan ZHANG  Qin YU  

IEICE TRANSACTIONS on Communications   Vol.E95-B   No.12   pp.3845-3854
Publication Date: 2012/12/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E95.B.3845
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Wireless Communication Technologies
power control,  relaying,  intercell interference,  cellular network,  

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This paper focuses on power control in relay-enhanced multicell networks with universal frequency reuse for maximizing the overall system throughput, subject to interference and noise impairments, and individual power constraints at both BSs and RSs. With a high signal-to-interference-plus-noise ratio (SINR) approximation, an energy efficiency based power allocation algorithm is proposed to achieve the maximum sum throughput with the least power consumption. Moreover, an iterative quasi-distributed power allocation algorithm is also presented, which is suitable for any SINR regime. Numerical results indicate that the proposed algorithms approach the optimal power allocation and the system performance can be significantly improved in terms of network throughput and energy efficiency.