Distributed Resource Allocation in Two‐Hierarchy Networks

• Published in: ETRI journal Vol. 34; no. 2; pp. 159 - 167
• Main Authors: Liu, Shuhui, Chang, Yongyu, Wang, Guangde, Yang, Dacheng
• Format: Journal Article
• Language: English
• Published: 한국전자통신연구원 01.04.2012
• Subjects: cross‐tier interference; Distributed resource allocation; femtocell; macrocell; 전자/정보통신공학
• ISSN: 1225-6463; 2233-7326
• DOI: 10.4218/etrij.12.0111.0451

In this paper, a new distributed resource allocation algorithm is proposed to alleviate the cross‐tier interference for orthogonal frequency division multiplexing access macrocell and femtocell overlay. Specifically, the resource allocation problem is modeled as a non‐cooperative game. Based on game theory, we propose an iterative algorithm between subchannel and power allocation called distributed resource allocation which requires no coordination among the two‐hierarchy networks. Finally, a macrocell link quality protection process is proposed to guarantee the macrocell UE's quality of service to avoid severe cross‐tier interference from femtocells. Simulation results show that the proposed algorithm can achieve remarkable performance gains as compared to the pure waterfilling algorithm.