Figure 1 Block diagram of a remote meter reading
Management of machines using a 2M APN Dedicated
Internet Access Mobile's GPRS / GSM networks, the two
sides are used between the Internet router, a fixed IP
address private wide-area connections, in the GGSN and
the Mobile Internet using GRE tunnels between routers.
Mobile customers assigned a dedicated APN, for GPRS /
GSM network, SIM card only special opening of the
dedicated APN, restrictions on the use of other APN,
received APN later, to all control points and centers
within the fixed allocation of mobile IP. Data
Concentrator and management of aircraft platforms with
end to end encryption, the entire transfer process to avoid
information leakage may be. Use a firewall to isolate the
two sides, and the firewall on the IP address and port
filtering. This approach has a very good real-time
performance, safety and stability [5-6].
The composition of the remote meter reading system,
pulse meter, concentrator and the collector of the
functional block diagram shows in Figure 2.