上行OFDMA系统中基于业务统计信息的高能效资源分配算法  

Energy-efficient Resource Allocation Algorithm Based on Traffic Statistical Information for Uplink OFDMA Systems

作　　者：任海豹[1] 赵明[1] 周武旸[1] 朱近康[1] 

机构地区：[1]中国科学技术大学个人通信与扩频实验室,合肥230027

出　　处：《电子与信息学报》2013年第6期1325-1330,共6页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(61172088);国家863计划项目(2012AA011402)资助课题

摘　　要：该文研究了上行OFDMA系统中高能效资源分配问题。首先,在考虑数据包重传条件下将多用户上行OFDMA系统建模成M/G/1排队系统,该系统的业务服务速率由其分配得到的资源和当前信道共同决定。在业务平均时延约束下,建立了基于业务统计特性的能效资源分配优化模型。该问题为NP难问题,文中提出一种启发式算法,将资源分配分为两步进行:子信道数目确定和子信道分配。仿真表明,所提算法能够在保证业务平均时延的要求下,有效地提升系统能效。Energy-efficient resource allocation issue in uplink OFDMA systems is investigated. Firstly, the uplink OFDMA system is modeled as a M/G/1 queuing system with the consideration of the packet retransmission and the serve rate of the system is determined by both the resource allocation result and the current channel condition. With the constraint of average delay of traffic, an optimization model for energy-efficient resource allocation is formulated based on the traffic statistical information. Since the optimization problem is NP-hard, a heuristic algorithm is proposed which allocates the resource by two steps： the number of suchannels determines, and allocates the subchannels to each user. Simulation results show that, the proposed algorithm can improve the system energy efficiency effectively while guaranteeing the average delay requirement of the traffic.

关 键 词：上行OFDMA系统 业务统计信息 M G 1排队系统 高能效资源分配 平均时延受限 

分 类 号：TN929.5[电子电信—通信与信息系统]