跨网专线低时延双归保护的实现与应用

Implementation And Application Of low-delay Dual-node Protection For Cross-Network Dedicated Lines

随着技术的进步城域传输网逐渐由PTN取代,但是为了保证专线业务的低时延要求,长途一般采用SDH进行传输,到了本地城域网利用PTN传输。这样就面临着业务需要跨PTN和SDH网开通。因没有不同网间的保护机制会导致重大故障发生。通过此方案可实现低时延跨网双节点互联保护,当端口或设备宕机时实现跨网专线业务的保护,从而避免重大故障的发生。

With the advancement of technology, the metropolitan area transmission network is gradually replaced by PTN. However, in order to ensure the low delay requirement of the dedicated lines service, the long distance is generally transmitted by SDH, and the local metropolitan area network is transmitted by using PTN. This will face the need for the services to be opened across PTN and SDH networks. There is no protection mechanism between different networks that can cause major failures.Through this solution, low-delaycross-network two-node interconnection protection can be realized. When a port or device is down, the protection of the inter-network dedicated line service can be realized to avoid major failures.