| 摘要 |
The disclosure provides a method and system for reducing channel switching delay of an IPTV. The method comprises that: an IPTV system plans a multicast association mode; the IPTV system determines, after receiving a message of requesting to access a multicast group from a terminal, other multicast groups associated with the multicast group which the terminal requests to access according to the multicast association mode and makes the terminal synchronously join in the multicast group which the terminal requests to access and other multicast groups associated with the multicast group which the terminal requests to access; provides normal multicast streams of the multicast group which the terminal requests to access, and provides no multicast streams or Low-Definition Television (LDTV) multicast streams of the other multicast groups associated with the multicast group which the terminal requests to access, and when the terminal switches channels, the IPTV system provides the terminal with normal multicast streams of the multicast group of a channel to which the terminal requests to switch when determining that the terminal has joined in the multicast group of the channel to which the terminal requests to switch. The method can reduce the channel switching delay of the IPTV and further improve the QoS of the IPTV service. |
