The request/transmit based upstream bandwidth resource allocation policy of DOCSIS introduces a trouble to the quality of the data service provided in the I-IFC networks. In this paper, the mechanism of the upstream d...The request/transmit based upstream bandwidth resource allocation policy of DOCSIS introduces a trouble to the quality of the data service provided in the I-IFC networks. In this paper, the mechanism of the upstream data transrmitting and the process of data service transmitting in the HFC networks are described in detail, and the perfor- mance of the data service in HFC networks is analyzed. An advanced upstream bandwidth resource allocation policy is proposed to improve the quality of the data service in the HFC networks.展开更多
The timeslot synchronous mechanism of the upstream channel in HFC network is introduced in this paper.A mathematical model is built for the fault recovery of HFC network. We emphasize on analyzing the average time ofH...The timeslot synchronous mechanism of the upstream channel in HFC network is introduced in this paper.A mathematical model is built for the fault recovery of HFC network. We emphasize on analyzing the average time ofHFC network completing fault recovery. The result of theory analysis shows network scale of service domain, back-off parameter's value of the contention resolution algorithm and the allocation policv of initialization ranging slot havegreat effect on the fault recovery ability of HFC broadband access network.展开更多
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...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.展开更多
文摘The request/transmit based upstream bandwidth resource allocation policy of DOCSIS introduces a trouble to the quality of the data service provided in the I-IFC networks. In this paper, the mechanism of the upstream data transrmitting and the process of data service transmitting in the HFC networks are described in detail, and the perfor- mance of the data service in HFC networks is analyzed. An advanced upstream bandwidth resource allocation policy is proposed to improve the quality of the data service in the HFC networks.
文摘The timeslot synchronous mechanism of the upstream channel in HFC network is introduced in this paper.A mathematical model is built for the fault recovery of HFC network. We emphasize on analyzing the average time ofHFC network completing fault recovery. The result of theory analysis shows network scale of service domain, back-off parameter's value of the contention resolution algorithm and the allocation policv of initialization ranging slot havegreat effect on the fault recovery ability of HFC broadband access network.
文摘针对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.
