HFC Access Network Design for Time-shift TV Service
Time-shift TV service based on server-cache is a dynamic bandwidth allocation and terminal exclusive interactive application,expenditure of edge QAM bandwidth dominates the costs of launching the service.Network design depends on the bandwidth demand at the peak of the business.An expanded mechanism is used to enable Erlang B model applicable to the traffic of time-shift TV service and also gives a definition of service performance.Through the analysis of the characteristics of time-shift TV service and user activities of on-demand,a formula is provided to calculate the optimal RF numbers that maximize the usage of network bandwidth and minimize the costs of network deployment.