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.
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.
