A new method for multi-protocol label switching is presented in this study, whose core idea is to construct model for simulating process of accommodating network online loads and then adopt genetic algorithm to optimi...A new method for multi-protocol label switching is presented in this study, whose core idea is to construct model for simulating process of accommodating network online loads and then adopt genetic algorithm to optimize the model. Due to the heuristic property of evolutional method, the new method is efficient and effective, which is verified by the experiments.展开更多
A new coarse-grained differentiated least interference routing algorithm(CDLI) with DiffServ-Aware was presented.This algorithm is composed of off-line and on-line stages,taking into account both real-time traffic and...A new coarse-grained differentiated least interference routing algorithm(CDLI) with DiffServ-Aware was presented.This algorithm is composed of off-line and on-line stages,taking into account both real-time traffic and best-effort traffic.Off-line stage is to determine the shortest path set disjointed path(DP) database for real-time traffic,and to identify link critical value by traffic profile information of real-time traffic and DP database.On-line stage is at first to select route in the DP database for real-time traffic,if there is no path to meet the needs,the dynamic routing will be operated.On-line routing algorithm chooses the relatively short path for real-time traffic to meet their bandwidth requirements,and for best-effort traffic it chooses a lighter load path.The simulation results show that compared with the dynamic online routing algorithm(DORA) and constrained shortest path first(CSPF) algorithm,the new algorithm can significantly improve network throughput and reduce the average path length of real-time traffic.This guarantees quality of service(QoS) of real-time traffic while improving the utilization of network resources.展开更多
Silica-based planar lightwave circuit(PLC)devices can reduce transmission loss and cost in a quantum key distribution(QKD)system,and have potential applications in integration and production.A PLC-based quantum decodi...Silica-based planar lightwave circuit(PLC)devices can reduce transmission loss and cost in a quantum key distribution(QKD)system,and have potential applications in integration and production.A PLC-based quantum decoding integrated chip for multi-protocols is designed and fabricated,which is composed of variable optical splitters(VOSs),asymmetric Mach-Zehnder interferometers(AMZIs),and variable directional couplers(VDCs).Balanced pulse-pairs of four outputs are obtained simultaneously with measured delay times of 405 ps and 402 ps,respectively.The chip has advantages in achieving high interference visibility and low quantum bit error rate(QBER).展开更多
为解决电力工程远程运维平台中IEC 61850、Modbus及电力线通信(Power Line Communication,PLC)专有协议的异构设备统一接入问题,设计采用分层架构的多协议融合通信中间件,通过协议接入层、数据处理层和应用服务层的协同工作,实现多源数...为解决电力工程远程运维平台中IEC 61850、Modbus及电力线通信(Power Line Communication,PLC)专有协议的异构设备统一接入问题,设计采用分层架构的多协议融合通信中间件,通过协议接入层、数据处理层和应用服务层的协同工作,实现多源数据格式转换、异构协议适配和实时传输调度。研究结果表明,该中间件有效提高了协议转换成功率和系统吞吐量,降低了传输延迟和网络负载。展开更多
基金This work was supported by the National Natural Science Foundation of China (No10371097)Open Project of Com-putational Key Laboratory in Yunnan Provice
文摘A new method for multi-protocol label switching is presented in this study, whose core idea is to construct model for simulating process of accommodating network online loads and then adopt genetic algorithm to optimize the model. Due to the heuristic property of evolutional method, the new method is efficient and effective, which is verified by the experiments.
基金Project(2003AA781011) supported by the National High-Tech Research and Development of Program of China Project(20072022) supported by Science and Technology Foundation of Liaoning Province,China
文摘A new coarse-grained differentiated least interference routing algorithm(CDLI) with DiffServ-Aware was presented.This algorithm is composed of off-line and on-line stages,taking into account both real-time traffic and best-effort traffic.Off-line stage is to determine the shortest path set disjointed path(DP) database for real-time traffic,and to identify link critical value by traffic profile information of real-time traffic and DP database.On-line stage is at first to select route in the DP database for real-time traffic,if there is no path to meet the needs,the dynamic routing will be operated.On-line routing algorithm chooses the relatively short path for real-time traffic to meet their bandwidth requirements,and for best-effort traffic it chooses a lighter load path.The simulation results show that compared with the dynamic online routing algorithm(DORA) and constrained shortest path first(CSPF) algorithm,the new algorithm can significantly improve network throughput and reduce the average path length of real-time traffic.This guarantees quality of service(QoS) of real-time traffic while improving the utilization of network resources.
基金Project supported by the National Key Research and Development Program of China(Grant No.2018YFA0306403)the National Nature Science Foundation of China(Grant No.61805232).
文摘Silica-based planar lightwave circuit(PLC)devices can reduce transmission loss and cost in a quantum key distribution(QKD)system,and have potential applications in integration and production.A PLC-based quantum decoding integrated chip for multi-protocols is designed and fabricated,which is composed of variable optical splitters(VOSs),asymmetric Mach-Zehnder interferometers(AMZIs),and variable directional couplers(VDCs).Balanced pulse-pairs of four outputs are obtained simultaneously with measured delay times of 405 ps and 402 ps,respectively.The chip has advantages in achieving high interference visibility and low quantum bit error rate(QBER).
文摘为解决电力工程远程运维平台中IEC 61850、Modbus及电力线通信(Power Line Communication,PLC)专有协议的异构设备统一接入问题,设计采用分层架构的多协议融合通信中间件,通过协议接入层、数据处理层和应用服务层的协同工作,实现多源数据格式转换、异构协议适配和实时传输调度。研究结果表明,该中间件有效提高了协议转换成功率和系统吞吐量,降低了传输延迟和网络负载。
