In many wireless sensor network applications, it should be considered that how to trade off the inherent conflict between energy efficient communication and desired quality of service such as real-time and reliability...In many wireless sensor network applications, it should be considered that how to trade off the inherent conflict between energy efficient communication and desired quality of service such as real-time and reliability of transportation. In this paper, a novel routing protocols named balance energy-efficient and real-time with reliable communication （BERR） for wireless sensor networks （WSNs） are proposed, which considers the joint performances of real-time, energy efficiency and reliability. In BERR, a node, which is preparing to transmit data packets to sink node, estimates the energy cost, hop count value to sink node and reliability using local information gained from neighbor nodes. BERR considers not only each sender＇ energy level but also that of its neighbor nodes, so that the better energy conditions a node has, the more probability it will be to be chosen as the next relay node. To enhance real-time delivery, it will choose the node with smaller hop count value to sink node as the possible relay candidate. To improve reliability, it adopts retransmission mechanism. Simulation results show that BERR has better performances in term of energy consumption, network lifetime, reliability and small transmitting delay.展开更多
电力广域保护系统从点到点通信逐步走向网络化通信,如何在拥塞状态下保障业务的实时性和可靠性,成为亟待解决的问题.针对传输控制协议(Transmission control protocol,TCP)不能保障实时性以及用户数据报协议(User datagram protocol,UDP...电力广域保护系统从点到点通信逐步走向网络化通信,如何在拥塞状态下保障业务的实时性和可靠性,成为亟待解决的问题.针对传输控制协议(Transmission control protocol,TCP)不能保障实时性以及用户数据报协议(User datagram protocol,UDP)不能保障可靠性的问题,本文提出一种联合应用层纠错、检错和重发机制的UDP传输方案,在提供低时延传输服务的同时也能保障报文的可靠性.考虑到算法的复杂性,选择本原BCH(Bose-Chaudhuri-Hocquenghem)码作为纠错编码算法,设计了编码分组方法,并通过实验验证了分组方法的正确性;对增加纠错机制后的报文实时性进行了理论分析和仿真验证;为了解决突发误码和丢包情况下的可靠性问题,进一步设计了应用层检错和重发机制,并分析了时延.分析表明,在应用层增加本文所设计的纠错、检错和重发机制后增加的时延几乎可以忽略不计.最后给出了所提方法的联合应用算法,并进行了可靠性分析,结果表明本文方案的可靠性高于其他UDP传输方案.展开更多
随着以新能源为主体的新型电力系统的发展,传统的配电网保护难以满足坚强配电网的建设需求及自愈要求,因此结合5G网络的特点,研究了适用于配电网的5G网络切片技术,以提高通信的实时性;提出了基于边缘计算的相邻区域自适应相关系数算法,...随着以新能源为主体的新型电力系统的发展,传统的配电网保护难以满足坚强配电网的建设需求及自愈要求,因此结合5G网络的特点,研究了适用于配电网的5G网络切片技术,以提高通信的实时性;提出了基于边缘计算的相邻区域自适应相关系数算法,以提高数据分析的稳定性;以分布式数据传输单元(Data Transfer Unit,DTU)为依托,提出了公共单元网络架构,构建了低时延、同步的5G通道,实现DTU公共单元间的故障信息联动与边缘计算快速处理,为配电网更为精准、更为智能化地故障定位和隔离恢复提供支撑。展开更多
基金supported by the National Natural Science Foundation of China (61104033, 61174127, 60934003)the Hebei Provincial Natural Science Fund (F2012203109, F2012203126)
文摘In many wireless sensor network applications, it should be considered that how to trade off the inherent conflict between energy efficient communication and desired quality of service such as real-time and reliability of transportation. In this paper, a novel routing protocols named balance energy-efficient and real-time with reliable communication （BERR） for wireless sensor networks （WSNs） are proposed, which considers the joint performances of real-time, energy efficiency and reliability. In BERR, a node, which is preparing to transmit data packets to sink node, estimates the energy cost, hop count value to sink node and reliability using local information gained from neighbor nodes. BERR considers not only each sender＇ energy level but also that of its neighbor nodes, so that the better energy conditions a node has, the more probability it will be to be chosen as the next relay node. To enhance real-time delivery, it will choose the node with smaller hop count value to sink node as the possible relay candidate. To improve reliability, it adopts retransmission mechanism. Simulation results show that BERR has better performances in term of energy consumption, network lifetime, reliability and small transmitting delay.
文摘电力广域保护系统从点到点通信逐步走向网络化通信,如何在拥塞状态下保障业务的实时性和可靠性,成为亟待解决的问题.针对传输控制协议(Transmission control protocol,TCP)不能保障实时性以及用户数据报协议(User datagram protocol,UDP)不能保障可靠性的问题,本文提出一种联合应用层纠错、检错和重发机制的UDP传输方案,在提供低时延传输服务的同时也能保障报文的可靠性.考虑到算法的复杂性,选择本原BCH(Bose-Chaudhuri-Hocquenghem)码作为纠错编码算法,设计了编码分组方法,并通过实验验证了分组方法的正确性;对增加纠错机制后的报文实时性进行了理论分析和仿真验证;为了解决突发误码和丢包情况下的可靠性问题,进一步设计了应用层检错和重发机制,并分析了时延.分析表明,在应用层增加本文所设计的纠错、检错和重发机制后增加的时延几乎可以忽略不计.最后给出了所提方法的联合应用算法,并进行了可靠性分析,结果表明本文方案的可靠性高于其他UDP传输方案.
文摘随着以新能源为主体的新型电力系统的发展,传统的配电网保护难以满足坚强配电网的建设需求及自愈要求,因此结合5G网络的特点,研究了适用于配电网的5G网络切片技术,以提高通信的实时性;提出了基于边缘计算的相邻区域自适应相关系数算法,以提高数据分析的稳定性;以分布式数据传输单元(Data Transfer Unit,DTU)为依托,提出了公共单元网络架构,构建了低时延、同步的5G通道,实现DTU公共单元间的故障信息联动与边缘计算快速处理,为配电网更为精准、更为智能化地故障定位和隔离恢复提供支撑。
