多跳中继宽带电力线通信网络中的OFDM跨层资源分配

为保障宽带电力线通信网络的有效性和可靠性,提出一种综合多跳中继宽带电力线通信网络的业务层、网络层、介质访问控制(Media Access Control,MAC)层和物理层信息的正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)跨层资源分配方法.首先建立综合跨...

OFDM cross layer resource allocation in multi-relay broadband power line communication networks

To ensure the effectiveness and reliability of a broadband power line communication network,an Orthogonal Frequency Division Multiplexing(OFDM)cross layer resource allocation method is proposed.It integrates the information of the service,network,Media Access Control(MAC)and physical layers of a multi-hop relay broadband power line communication network.First,the utility value model of packet scheduling in the MAC layer and the subcarrier allocation model in the physical layer,based on fairness threshold control,are established.A priority scheduling criterion of packets with higher efficiency value in the MAC layer is proposed to meet the service quality requirements of each user.Then,the model and criteria are applied to the resource allocation of cross-nodes in broadband power line communication networks.Finally,the proposed and comparison algorithms are simulated in a typical power line channel environment.Simulation results show that the proposed algorithm can meet the service quality requirements of real-time users and non-real-time users in terms of communication rate and delay.It has larger system throughput and better delay characteristics.Thus the OFDM resource allocation problem in a multi-hop relay broadband power line communication network is solved in an effective manner.