机会中继OFDMA下行网络的高能效资源分配  

Energy-efficient Resource Allocation for Downlink OFDMA with Opportunistic Relaying

作　　者：马超 王涛[1] 金志文 孙彦赞[1] MA Chao;WANG Tao;JIN Zhi-wen;SUN Yan -zan(School of Communication & Information Engineering,Shanghai University,Shanghai 200444,China;95899 Unit of PLA,Beijing 100089,China)

机构地区：[1]上海大学通信与信息工程学院,上海200444 [2]95899部队,北京100089

出　　处：《计算机仿真》2019年第6期194-200,共7页Computer Simulation

基　　金：国家自然科学基金(61671011,61401266,61501289)

摘　　要：针对采用中继站的正交频分多址(OFDMA)下行通信网络进行优化资源分配,可以实现提升性能的目的。研究中继站辅助的下行OFDMA网络的能效最大化问题。考虑一种两个时隙内机会式子载波配对的传输协议。每个时隙的每个子载波可以选择直传模式或选择与另一个时隙的子载波配对的中继模式。资源分配方案决定了子载波的传输模式、中继站选择、中继子载波的配对、子载波到用户的分配、以及基站和中继站在各子载波的发射功率。首先,建立最大化网络能效的资源分配优化问题。然后,推导资源分配算法。最终,通过仿真验证上述资源分配算法能提高网络的能效。This paper studies an energy efficiency(EE)maximization problem for a downlink orthogonal frequency division multiple access(OFDMA)network aided by relays.A subcarrier-pair transmission protocol was considered,where each transmission was executed in two time slots.Every subcarrier in each slot can be used in either direct mode,or be paired with a subcarrier in another slot to operate in relay mode.The resource allocation(RA)has to determine the operation mode of subcarriers,the choice of relay station,subcarrier pairing,the assignment of subcarriers to users,and the power allocation of the base station and relay stations.We first proposed a mathematical description of the RA problem to maximize EE.We then derived a RA algorithm.Finally,we showed numerical results to demonstrate the proposed RA algorithm can improve the network EE.

关 键 词：正交频分多址 子载波配对 中继站 能效 

分 类 号：TN925[电子电信—通信与信息系统]