Analysis on dynamic IP of GPRS module

GPRS is a mobile service available for GSM mobile phones, and it can also be said to be a continuation of GSM.

The GPRS module uses the network proxy server GGSN as the transmission medium, and realizes real-time communication with the monitoring center through the conversion gateway service. After the GPRS module is powered on, the mobile communication system assigns it a dynamic IP address. It mainly sends a connection application to the server. The server is Establish a Socket connection.

In an ideal state, the connection always exists. After the module is powered on and the parameters are set, the Lepu inverter automatically sends a connection request until a connection port corresponding to the server port appears. At this time, the monitoring center PC logs on the Internet and sends it to the server. Connection request, until the terminal equipment is online, and the vacuum electrode is successfully connected at this time, real-time communication between the module and the PC is realized.

It is worth noting that because the IP of the GPRS module is uncertain, the entire link establishment process must be initiated by the GPRS module, that is, only the GPRS sender obtains the dynamic IP assigned by the system and informs the network registration server that the network registers Only the server can establish a communication link. The communication cost of GPRS wireless network can be chosen to be charged on a monthly basis or on a per-flow basis, and the safety and maintenance of the network are all performed by the operator, so the expenditure required after the normal use of the circuit breaker is very small.

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