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一种新的适用于多种公平准则的ABR流控算法的设计和研究 被引量:2
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作者 王晟 李乐民 《电子科学学刊》 CSCD 1999年第5期652-659,共8页
现有的各种ABR拥塞控制算法都只能实现最大最小准则下的公平性。本文提出了一种称为“动态带宽分配”(DBA)的控制算法,在该算法框架内可以方便地实现ATM论坛定义的任一准则下的公平性。仿真实验结果表明,新算法性能良好。
关键词 ABR业务 公平准则 ATM 流控算法
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TD-SCDMA系统中多载波HSDPA结构和流控算法分析
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作者 李伟林 姚彦 《电信科学》 北大核心 2007年第9期105-110,共6页
本文在TD-SCDMA系统的N频点小区技术的基础上,结合HSDPA的基本技术,详细分析了多载波HSDPA技术方案,并结合实际的产品开发需求给出了相应的软件模块和结构。在此基础上,进一步分析了HSDPA技术中所要考虑的相关算法。由于HSDPA技术使用了... 本文在TD-SCDMA系统的N频点小区技术的基础上,结合HSDPA的基本技术,详细分析了多载波HSDPA技术方案,并结合实际的产品开发需求给出了相应的软件模块和结构。在此基础上,进一步分析了HSDPA技术中所要考虑的相关算法。由于HSDPA技术使用了HARQ、16QAM以及自适应调制编码和快速的数据调度等技术,且在Node B侧增加了一个MAC-hs实体专门用来完成HSDPA的相关技术,其中用户数据快速调度算法和Iub接口的数据速率的控制算法是整个HSDPA的难点所在。本文将从产品角度对Iub接口的控制算法,即Iub接口的流控算法进行分析,给出流控算法的参考设计方案。 展开更多
关键词 基站 HSDPA 流控算法 混合自动重传 快速分组调度算法
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Damping controller design based on FO-PID-EMA in VSC HVDC system to improve stability of hybrid power system 被引量:2
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作者 Nima SHAFAGHATIAN Arvin KIANI +2 位作者 Naser TAHERI Zahra RAHIMKHANI Seyyed Saeed MASOUMI 《Journal of Central South University》 SCIE EI CAS CSCD 2020年第2期403-417,共15页
Wind energy sources have different structures and functions from conventional power plants in the power system.These resources can affect the exchange of active and reactive power of the network.Therefore,power system... Wind energy sources have different structures and functions from conventional power plants in the power system.These resources can affect the exchange of active and reactive power of the network.Therefore,power system stability will be affected by the performance of wind power plants,especially in the event of a fault.In this paper,the improvement of the dynamic stability in power system equipped by wind farm is examined through the supplementary controller design in the high voltage direct current(HVDC)based on voltage source converter(VSC)transmission system.In this regard,impacts of the VSC HVDC system and wind farm on the improvement of system stability are considered.Also,an algorithm based on controllability(observability)concept is proposed to select most appropriate and effective coupling between inputs-outputs(IO)signals of system in different work conditions.The selected coupling is used to apply damping controller signal.Finally,a fractional order PID controller(FO-PID)based on exchange market algorithm(EMA)is designed as damping controller.The analysis of the results shows that the wind farm does not directly contribute to the improvement of the dynamic stability of power system.However,it can increase the controllability of the oscillatory mode and improve the performance of the supplementary controller. 展开更多
关键词 hybrid power system high voltage direct current based on voltage source converter(VSC HVDC) fractional order PID(FO-PID)damping controller exchange market algorithm
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