动态频谱分配应用于实际电力线通信系统面临分配策略、实时算法等诸多挑战,到目前为止还未见有公开报道。定义并设计了一个实际的基于正交频分复用(orthogonal frequency division multiplexing,OFDM)的高速窄带电力线通信系统构架,并...动态频谱分配应用于实际电力线通信系统面临分配策略、实时算法等诸多挑战,到目前为止还未见有公开报道。定义并设计了一个实际的基于正交频分复用(orthogonal frequency division multiplexing,OFDM)的高速窄带电力线通信系统构架,并提出一种适用于该系统的动态频谱分配策略和对应的实时实现算法。该算法在任一种调制方式下将子载波进行分组,并对各个子载波组的功率进行排序,选择可用的子载波组,根据速率最大化准则确定最优的调制方式并分配功率。该算法与Hughes-Hartogs算法相比,具有较低的运算复杂度和较少的信令开销,与传统的等功率分配方式相比,误码性能更好。仿真结果和实验结果证明了该算法的有效性和优越性。展开更多
近年来电力线通信(Power Line Communication,PLCs)在智能电网研究领域广泛兴起,它可以使用一种便捷的调度方法来为电力系统提供通信容量。电力线通信接入网(PLC-AN)主要用于控制交流变电站和用户之间的信号并提供互联网接入到家庭的服...近年来电力线通信(Power Line Communication,PLCs)在智能电网研究领域广泛兴起,它可以使用一种便捷的调度方法来为电力系统提供通信容量。电力线通信接入网(PLC-AN)主要用于控制交流变电站和用户之间的信号并提供互联网接入到家庭的服务。在对电力线通信接入网(Power Line Communication access network,PLC-AN)中使用机会路由(Opportunistic Routing,OR)进行可行性分析后,提出并设计了基于电力线通信接入网的智能电网机会路由(PLC-OR),还使用分布式的方法解决了每秒位计的最大化问题。仿真结果表明,在实现相同可靠性的报文传输时,PLC-OR与传统的连续路由相比降低了数据包的传输时间。展开更多
The topology of in-home power line communication(PLC) networks varies frequently, which makes traditional routing algorithms failure. To solve this problem, an end-to-end transmission time for remaining path(TTRP) met...The topology of in-home power line communication(PLC) networks varies frequently, which makes traditional routing algorithms failure. To solve this problem, an end-to-end transmission time for remaining path(TTRP) metric-based opportunistic routing(TTRPOR) is proposed. Since a local broadcasting scheme is adopted, the algorithm can find the optimal path for forwarding packets in a dynamic PLC network. The closed-form of the outage probability for a PLC channel is derived to estimate the TTRP. It is proved that the average throughput can achieve maximum as the metric TTRP is utilized to sort candidate forwarding nodes.Numerical results show that the end-to-end throughput of networks with TTRPOR, outperforms that of the network adopting DSR and EXOR, especially for the case of varying-topology in-home PLC networks.展开更多
文摘动态频谱分配应用于实际电力线通信系统面临分配策略、实时算法等诸多挑战,到目前为止还未见有公开报道。定义并设计了一个实际的基于正交频分复用(orthogonal frequency division multiplexing,OFDM)的高速窄带电力线通信系统构架,并提出一种适用于该系统的动态频谱分配策略和对应的实时实现算法。该算法在任一种调制方式下将子载波进行分组,并对各个子载波组的功率进行排序,选择可用的子载波组,根据速率最大化准则确定最优的调制方式并分配功率。该算法与Hughes-Hartogs算法相比,具有较低的运算复杂度和较少的信令开销,与传统的等功率分配方式相比,误码性能更好。仿真结果和实验结果证明了该算法的有效性和优越性。
文摘近年来电力线通信(Power Line Communication,PLCs)在智能电网研究领域广泛兴起,它可以使用一种便捷的调度方法来为电力系统提供通信容量。电力线通信接入网(PLC-AN)主要用于控制交流变电站和用户之间的信号并提供互联网接入到家庭的服务。在对电力线通信接入网(Power Line Communication access network,PLC-AN)中使用机会路由(Opportunistic Routing,OR)进行可行性分析后,提出并设计了基于电力线通信接入网的智能电网机会路由(PLC-OR),还使用分布式的方法解决了每秒位计的最大化问题。仿真结果表明,在实现相同可靠性的报文传输时,PLC-OR与传统的连续路由相比降低了数据包的传输时间。
基金supported in part by Open Research Fund of National Key Laboratory of Electromagnetic EnvironmentChina Research Institute of Radiowave Propagation (Grant No. 201500013)+3 种基金Open Research Fund of National Mobile Communications Research LaboratoryJiangsu Provincial Science Foundation Project (Grant No. BK20150786)Southeast University (Grant No. 2013D02)National Natural Science Foundation of China (Grants Nos. 61501238, 61271230, 61472190)
文摘The topology of in-home power line communication(PLC) networks varies frequently, which makes traditional routing algorithms failure. To solve this problem, an end-to-end transmission time for remaining path(TTRP) metric-based opportunistic routing(TTRPOR) is proposed. Since a local broadcasting scheme is adopted, the algorithm can find the optimal path for forwarding packets in a dynamic PLC network. The closed-form of the outage probability for a PLC channel is derived to estimate the TTRP. It is proved that the average throughput can achieve maximum as the metric TTRP is utilized to sort candidate forwarding nodes.Numerical results show that the end-to-end throughput of networks with TTRPOR, outperforms that of the network adopting DSR and EXOR, especially for the case of varying-topology in-home PLC networks.
