Method and apparatus for transmitting messages in a mobile internet protocol network

A message transmission method in The invention claims a mobile Internet protocol network, comprising a characterised, wherein the method comprises the following steps: . A mobile node for transmitting to the hometown is only and transmitting with the first a detection message of network security IPsec protocol package a second a detection message of the IPsec protocol and User Datagram Protocol UDP sealed; B. mobile node to a aims at the first and second a detection message firewall of acknowledge message, a judging wherein the mobile node and hometown agents a exists for preventing short IPsec the fire; each, and continuously end of the wire updating and is message interaction, and uses a UDP protocol package the IPsec message, otherwise, a casing end of the wire updating and is message interaction. The invention, the mobile node and hometown agents exists preventing short IPsec the fire, mobile node and corresponding to the end cover are located on the message interaction.