Adaptive joint bandwidth and power allocation in heterogeneous wireless access environment  

作　　者：YAN JiLei LI JianDong ZHAO LinJing 

机构地区：[1]Broadband Wireless Communications Laboratory,Information Science Institute,State Key Laboratory of ISN,Xidian University

出　　处：《Science China(Information Sciences)》2014年第6期85-98,共14页中国科学（信息科学）（英文版）

基　　金：supported by the National Basic Research Program of China(973 Program;Grant No.2009CB320404);National Science Foundation(Grant No.61231008);National Natural Science Foundation(Grant No.60902032);PCSIRT(IRT0852);Teaching Research Award Program for Outstanding Young Teachers in Higher Education Institutions of MOE,PRC;111 Project(B08038);National S&T Major Project(2009ZX03007-004)

摘　　要：Joint bandwidth and power allocation for a multi-radio access（MRA）system in a heterogeneous wireless access environment is studied.Since both the number of users being served by the system and the wireless channel state are time-varying,the optimal resource allocation is no longer a static optimum and will change with the varying network state.Moreover,distributed resource allocation algorithms that require iterative updating and signaling interactions cannot converge in negligible time.Thus,it is unrealistic to assume that the active user number and the wireless channel state remain unchanged during the iterations.In this paper,we propose an adaptive joint bandwidth and power allocation algorithm based on a novel iteration stepsize selection method,which can adapt to the varying network state and accelerate the convergence rate.A distributed solution is also designed for the adaptive joint resource allocation implementation.Numerical results show that the proposed algorithm can not only track the varying optimal resource allocation result much more quickly than a traditional algorithm with fixed iteration stepsize,but can also reduce the data transmission time for users and increase the system throughput.Joint bandwidth and power allocation for a multi-radio access（MRA）system in a heterogeneous wireless access environment is studied.Since both the number of users being served by the system and the wireless channel state are time-varying,the optimal resource allocation is no longer a static optimum and will change with the varying network state.Moreover,distributed resource allocation algorithms that require iterative updating and signaling interactions cannot converge in negligible time.Thus,it is unrealistic to assume that the active user number and the wireless channel state remain unchanged during the iterations.In this paper,we propose an adaptive joint bandwidth and power allocation algorithm based on a novel iteration stepsize selection method,which can adapt to the varying network state and accelerate the convergence rate.A distributed solution is also designed for the adaptive joint resource allocation implementation.Numerical results show that the proposed algorithm can not only track the varying optimal resource allocation result much more quickly than a traditional algorithm with fixed iteration stepsize,but can also reduce the data transmission time for users and increase the system throughput.

关 键 词：heterogeneous wireless networks multi-radio access system resource allocation network utility maximization adaptive stepsize 

分 类 号：TN92[电子电信—通信与信息系统]