System composition of short message gateway

Taking Monternet as an example, this paper introduces the system composition of short message gateway. Service provider (SP): information provider of short message service;

Internet short message gateway (ISMG): provides a channel for data exchange between SP and SMS center, and connects with SP through CMPP (China Mobile Peer-to-Peer) protocol and SMS center through SMPP3.3 protocol;

Short Message Service Center (SMSC): use signaling network to send short messages to mobile phone users;

Gateway Name Server (GNS): Provides routing queries for SMS gateways. Users send SMS services-that is, MO services, such as information on demand. The short message center sends the short message content to the connected short message gateway through SMPP protocol. According to the SMS sending number (that is, the service code of SP), the SMS gateway sends the SMS content to the corresponding SP in CMPP protocol for processing.

Users receive short message services, that is, MT services, such as SMS messages, ringtone downloads, etc. SP providing this service sends the short message content to the connected short message gateway by CMPP protocol, and the short message gateway sends it to the short message center to which the user belongs by SMPP protocol according to the user's mobile phone number segment. If the SMS center to which the user belongs and the SP providing the service are connected to different SMS gateways, it will be forwarded by the SMS gateway using CMPP protocol.

The route between SP and SMS center connected by SMS gateway is maintained by tandem gateway, and SMS gateway queries and updates the route through CMPP protocol. Each SMS gateway will cache the queried routing information locally, and the tandem gateway will also publish the updated routing information with CMPP protocol.