基于MAC层优先级调度的宽带电力线跨层资源分配  

Cross-layer resource allocation of broadband power line based on MAC layer priority scheduling

作　　者：李敏 年安君 王洁 徐晓明 LI Min;NIAN An-jun;Wang Jie;XU Xiao-ming(State GridBengbu Electric Power Supply Company,Bengbu 233000,Anhui Province,China)

机构地区：[1]国网蚌埠供电公司,安徽蚌埠233000

出　　处：《信息技术》2019年第1期142-145,150,共5页Information Technology

摘　　要：传统的资源分配算法采用分层系统,且不适用于宽带电力线通信系统中的不良信道环境。文中引入跨层思想提高资源利用率,保证服务质量(QoS),提出了一种基于MAC层QoS优先级调度功能的宽带电力线跨层资源分配方案。该算法考虑了实时用户对延迟的要求和非实时用户对队列长度的要求,并提出用户优先级函数。根据其优先级函数计算每个用户的数据包数量,生成基于效用函数的调度序列。在物理层中,根据调度的数据包,该算法分配物理资源用于分组。仿真结果表明,该算法在提高用户QoS的同时兼顾了系统的性能和吞吐量。The traditional resource allocation algorithm adopts a layered system and is not suitable for the bad channel environment in broadband power line communication systems. This paper introduces crosslayer to improve resource utilization and guarantee quality of service( QoS). A broadband power line cross-layer resource allocation scheme based on MAC layer QoS priority scheduling is proposed. The algorithm considers the requirements of real-time users for delay and the requirements of non-real-time users for queue length,and proposes a user priority function. The number of packets per user is calculated according to its priority function,and a scheduling sequence based on the utility function is generated. In the physical layer,according to the scheduled data packets,the algorithm allocates physical resources for grouping. The simulation results show that the algorithm improves the QoS for users while taking the performance and throughput of the system into account.

关 键 词：宽带电力线通信 正交频分复用 跨层调度 资源分配 

分 类 号：TN914.2[电子电信—通信与信息系统]