Communication link abnormality protection method based on h.248 terminal

Abstract

Provided is an abnormality protection method for a communication link based on a H.248 terminal, which is used for detecting abnormalities of a communication link between a terminal and a media gateway controller (MGC) and recovering same. The method comprises the steps of: setting a master MGC and a group of standby MGCs; setting and starting a detection timer; judging whether the detection timer has timed out, and according to a judgment result, determining whether the detection timer has restarted and whether the master MGC sends a message to a terminal; judging whether the terminal receives the message sent by the master MGC within the time set by the detection timer, and according to a judgment result, determining whether to start cold-start registration; and starting the cold-start registration, so that the terminal requests the registration of the master MGC and the plurality of standby MGCs in sequence until the registration succeeds. The method judges whether a link is interrupted by way of timing detection, so that a communication terminal device can discover the survival state of an MGC in time, and takes a policy, which has been customized in advance, in time, according to the state change of the MGC; and at the same time, the method is free from the limitations of the type of terminal, thereby having a simple operation, timeliness and a high efficiency.

Description

technical field [0001] The present invention relates to the field of communications, in particular to an abnormal protection method of a communication link based on an H.248 terminal. Background technique [0002] The H.248 media gateway control protocol is an interface protocol applied between the media gateway controller and the media gateway terminal, and is also one of the most active communication protocols in the industry. At present, in a softswitch network using the H.248 protocol, generally only the MGC controls the heartbeat between the Media Gateway Controller (MGC) and the terminal. The specific implementation is as follows. The MGC uses the audit parameter value to command the AuditValue message. As a heartbeat message, it is periodically sent to the terminal. When no response message from the terminal is received after retransmission of the heartbeat message, it is determined that the terminal is faulty, that is, the link between the MGC and the terminal is in...

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Problems solved by technology

[0003] However, in this way, the terminal does not open the active heartbeat message, and the sending of the heartbeat message by the MGC must be subject to the terminal. When the MGC fails or the network fails, the MGC server cannot send the heartbeat message, or the sent heartbeat message The message cannot reach the gateway terminal. Even if the MGC fault or the network fault is eliminated after a period of time, and the network is restored, the H.248 communication terminal will always be offline on the MGC, affecting user use

If you want to find out the link abnormal problem, due to the complex network environment and the different manufacturers of H.248 communication terminal equipment, it often requires the cooperation of multiple manufacturers, the inspection cycle is long, and consumes a lot of manpower and material resources

Therefore, only relying on the current heartbeat method cannot guarantee that the gateway terminal can accurately and timely detect and restore the link interruption when the link is abnormal.

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