Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài : Resource allocation based on integer programming and game theory in uplink multi-cell cooperative OFDMA systems | Hou et al. EURASIP Journal on Wireless Communications and Networking 2011 2011 169 http content 2011 1 169 o EURASIP Journal on Wireless Communications and Networking a SpringerOpen Journal RESEARCH Open Access Resource allocation based on integer programming and game theory in uplink multi-cell cooperative OFDMA systems Zhao Hou Yueming Cai and Dan Wu Abstract In this article we propose a semi-distributed resource allocation framework for the resource optimization in multicell uplink cooperative orthogonal frequency division multiplexing systems. Specifically we model the resource allocation framework as an optimal problem. This optimization problem is divided into two steps. First using integer programming we achieve the joint relay selection and subcarrier allocation based on maximizing system sum rate in a centralized way. Second the distributed power allocation is achieved based on game theory for cooperative and non-cooperative users respectively. For cooperative mobile stations an improved utility is proposed to regulate power allocation in the two time slots. Besides the existence of Nash equilibrium NE a new approach for the strict mathematical proof of the uniqueness of NE is proposed. Simulation results demonstrate that the proposed algorithm successfully combines the merits of centralized and distributed framework. It can effectively make use of relays to enhance the sum rate of users as well as achieve the fairness among users. Keywords cooperative OFDMA systems inter-cell interference semi-distributed resource allocation framework game theory progressive optimization Nash equilibrium 1. Introduction Owing to its potential to realize high-rate and reliable communications over wireless channels cooperative orthogonal frequency division multiplexing OFDM technology has drawn extensive attention in recent years as a critical 4G technology. The performance of an OFDMA system depends on careful resource management including .
