Joint Resource Allocation for Lifetime-aware Cooperative Multi-carrier DF System  

作　　者：Chao-Ping Guo Kun Han Xiao-Long Zhang Hai-Lin Zhang 

机构地区：[1]State Key Laboratory of Integrated Services Network,Xidian University [2]Xi'an Communication Institute

出　　处：《International Journal of Automation and computing》2014年第1期87-92,共6页国际自动化与计算杂志（英文版）

基　　金：supported by Important National Science and Technology Specific Projects(No.2011ZX03003-001-04 and 2012ZX03003-012);National Natural Science Foundation of China(No.61072069);Fundamental Research Funds for the Central Universities(No.72101859);State Key Laboratory of Integrated Services Networks(No.ISN090105);111 Project(No.B08038)

摘　　要：In this paper,we study the problem of optimal resource allocation for lifetime maximization in an orthogonal-frequencydivision multiplexing(OFDM)system with decode-and-forward relay.The goal is to minimize total energy cost of the system by jointly optimizing power allocation,subcarrier pairing and relay selection.We present a heuristic solution that is composed of two parts.The first part is an optimal power allocation approach to allocate power to a subcarrier pair of the source and the relay.The second part is a modified Hungarian algorithm to make subcarrier pairing and relay selection.Evaluations show that the presented scheme outperforms other schemes in the total transmitted data and the network lifetime.In this paper,we study the problem of optimal resource allocation for lifetime maximization in an orthogonal-frequencydivision multiplexing(OFDM)system with decode-and-forward relay.The goal is to minimize total energy cost of the system by jointly optimizing power allocation,subcarrier pairing and relay selection.We present a heuristic solution that is composed of two parts.The first part is an optimal power allocation approach to allocate power to a subcarrier pair of the source and the relay.The second part is a modified Hungarian algorithm to make subcarrier pairing and relay selection.Evaluations show that the presented scheme outperforms other schemes in the total transmitted data and the network lifetime.

关 键 词：Cooperative communications resource allocation DECODE-AND-FORWARD orthogonal-frequency-division multiplexing(OFDM) subcarrier pairing power allocation relay selection 

分 类 号：TN919.3[电子电信—通信与信息系统]