A method for route optimization with a dual mobile IPv4 node in an IPv6-only network is provided. Of all possible variables that might be used to characterize customer transactions, a limited number are selected on the basis of discriminating power to define customer profiles. After output timing delays TD0-TD2 of the frames FR are shifted by an optimal delay interval D between the paths P0-P2 based on the number of the paths \u201c3\u201d, the output timing delays TD1 and TD2 are restored by preliminarily obtained transmission delays for the paths P1 and P2 to the path P0.