Patent ID: 8799497

Claim:
An Internet Protocol (IP) network-based headend system, comprising: a cable modem termination device to receive a network protocol packet from a subscriber modem device, and to analyze the received network protocol packet to obtain service flow information pre-registered in the subscriber modem device; wherein the cable modem termination device compares the service flow information pre-registered in the subscriber modem device with service flow information pre-registered in the cable modem termination device to determine whether the service flow information pre-registered in the subscriber modem device is identical to the service flow information pre-registered in the cable modem termination device; a quadrature amplitude modulation (QAM) pre-processing device to: receive the pre-registered service flow information and the received network protocol packet from the cable modem termination device, transmit the obtained pre-registered service flow information and the received network protocol packet to a service supply server that is connected based on an IP network, to be determined, by the service supply server, as a data reception route, and receive a video data stream from the service supply server to perform data processing; and a QAM post-processing device to receive the data processed video data stream from the QAM pre-processing device to transmit to the subscriber modem device based on the pre-registered service flow information; and wherein the cable modem termination device transmits the network protocol packet to the QAM pre-processing device based on determining that the service flow information pre-registered in the subscriber modem device is identical to the service flow information pre-registered in the cable modem termination device.