tailieunhanh - Signaling System No.7 Protocol Architecture And Sevices part 19

Signaling Network Management Failures in the SS7 network have potentially devastating effects on the communications infrastructure. The loss of all SS7 signaling capabilities at an SP isolates it from the rest of the network. | Signaling Network Management Failures in the SS7 network have potentially devastating effects on the communications infrastructure. The loss of all SS7 signaling capabilities at an SP isolates it from the rest of the network. The SS7 networks in existence today are known for their reliability primarily due to the robustness of the SS7 protocol in the area of network management. Of course this reliability must be accompanied by good network design to provide sufficient network capacity and redundancy. MTP3 Network Management is comprised of a set of messages and procedures that are used to ensure a healthy signaling transport infrastructure. This involves automatically invoking actions based on network events such as link or route failures and reporting network status to other nodes. Signaling Network Management is divided into three processes Traffic management Route management Link management Traffic management is responsible for dealing with signaling traffic which are the messages generated by MTP3 users such as ISUP and SCCP. The goal of Traffic management is to keep traffic moving toward its destination even in the event of network failures and congestion with as little message loss or mis-sequencing as possible. This movement often involves rerouting traffic onto an alternate network path and in some situations might require message retransmission. Route management exchanges information about routing status between nodes. As events occur that affect route availability route management sends messages to notify other nodes about the change in routing states. Route management supplies information to traffic management allowing it to adjust traffic patterns and flow accordingly. Link management activates deactivates and restores signaling links. This involves notifying MTP users of the availability of signaling links and invoking procedures to restore service when a disruption has occurred. This level of network management is most closely associated with the .

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