基于公平因子的宽带电力线OFDM系统跨层资源分配

针对宽带电力线通信OFDM系统的资源优化分配问题,在分析低压宽带电力线通信系统网络结构的基础上,建立资源不足且存在多种实际约束下多业务多用户在多子载波上的资源分配模型,提出一种基于公平因子及用户紧急度的跨层资源分配算法,在保证RT用户最小速率及NRT用户间公平性的同时最大化系统吞吐量。典型电力线信道环境下的仿真结果表明,算法在满足资源分配模型优化目标下性能更优。

Cross-layer Resource Allocation for Broadband Power Line OFDM System Based on Fairness Factor

For the optimal resources allocation of broadband power line communication OFDM system, the network structure of low-voltage broadband power line communication system is analyzed in this paper, based on which the resources allocation model of multiple sub-carriers for multi-users and multi-services is built under such cases as lack resources and many application constraints, and a cross-layer resource allocation algorithm based on fairness factor and user emergency is proposed to maximize system throughput by both meeting the minimum rate demand of RT business and ensuring fairness among NRT users. The simulation is implemented in a typical power line channel environment, and results show that proposed algorithm has better performance with the target of satisfying resource allocation model.