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Cellular Networks
As a result of WAN latency from cellular networks, you cannot count the number of nodes in your link as the
timing is different for each link. Therefore, delay time in cellular networking is immeasurable and not suitable for
real-time systems.
timing is different for each link. Therefore, delay time in cellular networking is immeasurable and not suitable for
real-time systems.
Solution for Private IP
A common problem in M2M network planning is that cellular operators and service providers usually only
provide private and dynamic IP addresses. The reasons for doing so are threefold:
provide private and dynamic IP addresses. The reasons for doing so are threefold:
1. In the world of Internet communication, one of the biggest problems is that the number of public IP
addresses is running out quickly. It is therefore reasonable that cellular network operators issue private and
dynamic IP addresses to conserve valuable public IP resources.
dynamic IP addresses to conserve valuable public IP resources.
2. The bandwidth of a cellular network is so narrow that it is very vulnerable to cyber attack. Private IP
effectively prevents cyber attacks from paralyzing the networks.
3. Require only uplink from cellular device to WLAN. However, in most M2M applications, it is a requirement
that data exchange is a two-way communication either from server to client or client to server.
To solve this private IP issue for M2M applications, three major solutions are available:
1. Users can pay extra money to get a public and fixed IP SIM card. This way, cellular M2M system
configuration will be very similar to LAN architecture.
2. Users can get cellular VPN services from their ISP (Internet Service Provider) or a second tier operator
known as an MVNO (Mobile Virtual Network Operator). They offer services to allow cellular links between
nodes in a VPN that uses open connections or virtual circuits in a larger network, such as the Internet.
With the help of VPNs, cellular devices act as a VPN client that can initiate a connection with a VPN server
building a two-way communication environment for M2M applications.
nodes in a VPN that uses open connections or virtual circuits in a larger network, such as the Internet.
With the help of VPNs, cellular devices act as a VPN client that can initiate a connection with a VPN server
building a two-way communication environment for M2M applications.
3. Despite VPN being the most commonly seen solution to the private IP problem in M2M applications,
the data exchange inside a VPN can take up too much of the network resources for it requires heavy
duty encryption and decryption of data. To save valuable cellular network resources, some M2M
solution providers offer a software solution to help customers cope with the private IP problem. That is,
manufacturers provide middleware that works as a communication gateway.
duty encryption and decryption of data. To save valuable cellular network resources, some M2M
solution providers offer a software solution to help customers cope with the private IP problem. That is,
manufacturers provide middleware that works as a communication gateway.
Moxa OnCell Central Manager
The OnCell G3100 series is Moxa’s cellular IP gateway that connects serial or Ethernet devices to cellular
networks. As a leading industrial networking solution provider, Moxa is aware of the private IP issue troubling
many of our M2M customers. To solve this problem, Moxa has introduced OnCell Central Manager. Simply
install OnCell Central Manager onto a Server PC with a public IP address and register the IP addresses of
OnCell devices in your private network on the Client OnCell IP gateway. As soon as the OnCell IP gateway is
powered on, it will initiate the connection to OnCell Central Manager. Thanks to OnCell Central Manager, your
access points can now communicate with field devices via cellular networks so you don’t need to worry about
paying extra VPN service fees or wasting valuable cellular network resources.
networks. As a leading industrial networking solution provider, Moxa is aware of the private IP issue troubling
many of our M2M customers. To solve this problem, Moxa has introduced OnCell Central Manager. Simply
install OnCell Central Manager onto a Server PC with a public IP address and register the IP addresses of
OnCell devices in your private network on the Client OnCell IP gateway. As soon as the OnCell IP gateway is
powered on, it will initiate the connection to OnCell Central Manager. Thanks to OnCell Central Manager, your
access points can now communicate with field devices via cellular networks so you don’t need to worry about
paying extra VPN service fees or wasting valuable cellular network resources.