Realization method for protecting and restoring multiplex section of automatically switched optical network
A multiplex section protection and automatic switching technology, which is applied in the direction of data exchange network, digital transmission system, electrical components, etc., can solve the problems of no provision, failure of multiplex section protection capability, etc., and achieve the effect of improving survivability
Inactive Publication Date: 2013-02-27
ZTE CORP
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So how does the head node of the service determine that the protection capability of the multiplex section is invalid and start dynamic rerouting? How does the head node of the service determine that the network fault has been eliminated so that the current path of the service can be restored to the original path? These problems prior art does not provide corresponding solution, therefore it is necessary to provide solution to above-mentioned problem
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[0024] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to fully understand and implement the process of how to apply technical means to solve technical problems and achieve technical effects in the present invention.
[0025] figure 1 A schematic flow chart of an embodiment of the method of the present invention is shown, which mainly includes the following steps:
[0026] Step 110, automatically switching the first node of each connection in the optical network, through the management plane configuration or flooding through the routing protocol, and finally obtain the multiplex section protection configuration information of the entire network; it should be noted that in a network if there is If there are multiple connections, each connection corresponds to a first node;
[0027] Step 120, when a link failure occurs, a certain node of the automatic switching optical network at the...
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The invention discloses a realization method for protecting and restoring the multiplex section of an automatically switched optical network. The realization method is used to determine the protection capacity of the multiplex section and to start dynamic rerouting through service first nodes in the automatically switched optical network. The method comprises that the first node of each connection obtains configuration information for the protection of the multiplex section of the entire network; when a link fault occurs, if resources on the link are used by a plurality of connections, the node with the detected fault sends fault information expressing the fault to the first node of each connection and floods the fault information in the network; the first nodes of all connections maintain a full-network fault link list and the protection failure of the multiplex sections of the links passed through by a link path is analyzed in combination with the configuration information for the protection of the multiplex section; and the first node of each connection starts the dynamic rerouting to restore service. The method of the invention combines the protection and the dynamic rerouting of the multiplex section in the automatically switched optical network to collaboratively improve the survivability of the service.
Description
technical field [0001] The invention relates to an automatic switching optical network, in particular to a method for realizing the protection and restoration of the multiplexing section of the automatic switching optical network. Background technique [0002] In the Automatically Switched Optical Network (ASON), the control plane adopts distributed signaling and routing technology, and can restore services through dynamic rerouting in a wireless mesh network (mesh) network. Traditional optical networks before ASON can protect services in the following ways: two-fiber multiplex section shared protection ring, four-fiber multiplex section shared protection ring, and multiplex section link protection (1+1 / 1 :1 / 1:N), for details, refer to the description in ITU-T G.841 Types and characteristics of SDH network protection architectures. Since the above-mentioned multiplex section protection method has the characteristics of fast protection and high resource utilization rate, the...
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IPC IPC(8): H04B10/032H04L12/703H04L45/28
Inventor 柯明杨发明
Owner ZTE CORP