Sharing meshed protection realizing method and system
A technology of shared mesh and implementation methods, applied in transmission systems, digital transmission systems, data exchange networks, etc., and can solve problems such as no protection switching scheme and no standard being formulated.
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example 1
[0053] Example 1: Take the OTN network as an example to illustrate the signaling-based protection implementation scheme in the shared mesh protection. The signaling transmission mode is the in-band overhead mode, and the protocol type is the two-phase mode.
[0054] for figure 1 In the structure shown, the priority of work W1 is lower than that of work W2. Protection span PS2 failure such as figure 2 As shown, that is, node D to node E fail. The failure of the protection span PS2 only affects the protection path P1, not the protection path P2.
[0055] When the working service W2 fails, the node H as the first node sends a protection switching request, requesting to switch the working service W2 to the protection path P2, then the request signaling passes through the nodes F and E along the way, and finally reaches the nodes G and G as the tail node Judging that the request signaling is a high-priority request, first perform bridging and switching, and then send the revers...
example 2
[0060] Example 2: Taking M:N structure shared mesh protection as an example, describe the implementation scheme of protection based on signaling.
[0061] for Figure 10 In the structure shown, the priority of work W1 is higher than that of work W2. The work service W2 fails as Figure 11 shown.
[0062] The working service W1 also fails. When the protection resources are preempted by the working service W1, as in Figure 12 As shown, node C and node D will respectively notify node E and node F that the protection service is occupied by the high priority service W1. Node F will re-trigger the alarm process and switch to the protection path P3.
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