A method for detecting and maintaining network control channel reachability
A technology for controlling channels and accessibility, applied in the field of network detection and maintenance in the field of communications, can solve problems affecting signaling and control information routing and forwarding, errors, etc., to avoid the spread of erroneous inaccessibility information, improve reliability, The effect of fast forwarding
Inactive Publication Date: 2011-11-30
徐志成
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Problems solved by technology
[0007] The technical problem to be solved by the present invention is to provide a method for detecting and maintaining the reachability of network control channels, which overcomes the shortcomings of the independent operation of the two control channel detection mechanisms of the OSPF protocol and the LMP protocol in the prior art, and prevents wrong judgments. The routing reachability of adjacent nodes causes changes in the topology of the signaling network and affects the routing and forwarding of normal signaling and control information.
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[0028] Such as figure 1 As shown, it is a schematic diagram of the working principle of the Hello packet of the OSPF protocol and the LMP protocol according to the embodiment of the present invention. There are 3 ASON nodes in the network, which are respectively node one 101, node two 102 and node three 103.
[0029] There are one or more control channels between any two nodes, there are three control channels between node one 101 and node two 102, namely CC1, CC2 and CC3, and one between node two 102 and node three 103 The control channel controls CC5, and there is a control channel CC4 between node one 101 and node three 103 .
[0030] The control plane of each node runs OSPF and LMP protocols respectively, and the OSPF and LMP protocols between any two adjacent nodes send Hello packets respectively to detect the reachability of control plane nodes, and select a control channel as the current control channel, using to transmit signaling information. However, the LMP protoc...
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The invention provides a method for detecting and maintaining the reachability of a network control channel, comprising the following steps: a. configuring one or more control channels between two nodes in the communication network, and respectively monitoring the validity of each control channel; b. .Select one of the effective control channels between two nodes as the current control channel, and establish and maintain the adjacency relationship between nodes through this current control channel; c. After detecting the failure of the current control channel, first determine whether there is a backup control channel between the nodes : If there is a backup control channel, the node is reachable; if there is no backup control channel, the node is unreachable. The invention improves the reliability of the signaling network and the accuracy of reachability between nodes. When some control channels fail, ensure the reachability of the control channels between nodes as much as possible to avoid spreading wrong unreachability information, thus ensuring the effective and rapid forwarding of control and signaling information between nodes.
Description
technical field [0001] The invention relates to a method for detecting and maintaining a network in the field of communication, in particular to a method for realizing automatic maintenance of a control channel by using a protocol. Background technique [0002] Automatic Switched Optical Network (ASON, Automatic Switched Optical Network) introduces the switching function into the optical layer. ASON is an intelligent optical network, which adopts the client / server (Client / Server) architecture and has a well-defined interface, allowing the client to request services from the optical network server. The architecture of ASON and its general Automatic Switched Trans-port Networks (ASTN, Automatic Switched Trans-port Networks) are a research focus of the International Organization for Standardization. [0003] The architecture of ASON can be divided into three planes according to functions: transport plane, control plane and management plane. The channel through which the contr...
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IPC IPC(8): H04L29/06
Inventor 马恒秦涛
Owner 徐志成