Communication link abnormity protection method based on H.248 terminal

Abstract

The invention provides a communication link abnormity protection method based on an H.248 terminal. The protection method is used for detection on an abnormity of a communication link between a terminal and an MGC and recovery. The method comprises the following steps of setting a main MGC and a set of standby MGCs, setting and starting a detection timer, judging whether the detection timer exceeds time or not, determining whether the detection timer is restarted or not and whether the main MGC sends a message to the terminal or not according to a judgment result, judging whether the terminal receives the message sent by the main MGC or not within the time set by the detection timer, determining whether cold start registration is started or not according to a judgment result, and starting the cold start registration to make the terminal send registration requests to the main MGC and the standby MGCs in sequence until registration succeeds. According to the method, whether the link is broken or not is judged through timing detection so that the communication terminal can find the survival state of the MGCs in time, preset strategies are adopted timely according to the state changes of the MGCs, limitation from types of the terminal does not exist, operation is easy, and timeliness and high efficiency are achieved.

Description

technical field [0001] The invention relates to the communication field, in particular to an H.248 terminal-based communication link abnormality protection method. 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 it is also one of the most active communication protocols in the industry at present. 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 command AuditValue message As a heartbeat message, it is periodically sent to the terminal. When the heartbeat message is retransmitted and no response message from the terminal is received, it is determined that the terminal is faulty, that is, the link between the MGC and the terminal is interrupted. That ...

AI Technical Summary

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.

Images