Triangular routing is a method for transmitting packets of data in communications networks.
It uses a form of routing that sends a packet to a proxy system before transmission to the intended destination.
And meanwhile, the HA gets the updated binding information so the subsequent packets will be transferred directly from the CH to the new FA.
The mobile IP with route optimization sets high requirements on the CH.
The CH shall have the ability to obtain the binding information, encapsulate the packets and establish the tunnel.