发射台信源节传系统组播隔离技术研究

Research on Multicast Isolation Technology for Transmitting Station's Source Node Transmission System

描述了目前发射台多级信源节传组播导致网络拥塞的几个问题。通过IP组播拥塞控制的区域划分和IP组播边界的控制,结合实际应用中的几种节传模式,有效地解决了广播电视发射台站信源节传系统组播导致的网络拥塞问题。其中区域划分采用VLAN的trunk方式,IP组播边界的控制采用了端口隔离技术。以上两种方式不但适合较为复杂的局域网或区域性网络,而且在二层、三层交换机上轻松实现,具有很好的普适性。同时能够更好地适应多级信源节传系统,采用单一或组合的方式,对信源节传系统IP组播拥塞控制效果明显,提高了发射台信源节传网络的稳定性,保障了信源安全和播出安全。

This paper describes several problems of network congestion caused by multistage source festive multicast at transmitters. By dividing the area of IP multicast congestion control and controlling the border of IP multicast, and combining with several modes of transmission saving in practical application, the network congestion caused by multicast of source saving system in broadcast and television station is effectively solved by the above two modes. The trunk mode of VLAN is used to divide the area, and the port isolation technology is used to control the IP multicast boundary The above two methods are not only suitable for more complex LAN or regional network, but also easy to implement on the two-tier and three-tier switches, and have good universality. At the same time, it can better adapt to multi-level source-saving transmission system. Using a single or combination of ways has obvious effect for the source-saving transmission system IP multicast congestion control, improving the stability of the transmitter source-saving transmission network, and promising source security and broadcast security.