摘要
针对HFC(Hybrid Fiber-Coax)接入网络服务质量保证问题,通过对DOCSIS(Data-over-Cable Service Interface Specifi-cations)QoS(Quality of Service)标准进行深入研究,采用多种QoS技术并对其进行有针对性的改进从时延、带宽等方面保证了不同调度业务的服务质量,从而给出了一种适用于HFC网络接入设备的QoS系统解决方案.网络仿真结果显示采用该QoS系统架构提高了信道带宽利用率,保证了高优先级调度业务对带宽、时延等要求,"尽量级联"的级联策略使上行带宽利用率提高了大约25%.此外,该QoS系统架构已经成功应用于符合EuroDOCSIS1.1规范的支持双向有线电视点播平台中,通过了功能验证并表现出良好的稳定性.
In order to solve the service quality of HFC access network,we take a in-depth study with DOCSIS standard,and provide a QoS architecture for HFC MAC layer,this architecture can meet the time delay and bandwidth request of different service by using different QoS control technology.Based on the proposed architecture,network simulation test results show that the utilization rate of channel bandwidth has been improved 25% than before,and it ensured the time delay and bandwidth request of different service scheduling.Furthermore the proposed QoS architecture has been successfully integrated in the CM SoC platform which is compliance with EuroDOCSIS1.1 specification,and showed good stability
出处
《小型微型计算机系统》
CSCD
北大核心
2011年第8期1482-1486,共5页
Journal of Chinese Computer Systems
基金
北京市科技产业化项目(D0306008041021)资助
国家"八六三"项目(2008AA01Z134)资助
北京市教委科研计划面上项目(KM201110009002)资助
北京市属高等学校人才强教计划项目(PHR201007121)资助
