A distributed routing scheme in a mobile communication system

In a mobile communication system, the movement of the terminal must be cons idered, and the positional information of the terminal must be retained so that the terminal can be communicated with after movement. In a radio commu nication system composed only of terminals, the terminals do not form a hie rarchy, and it is difficult to acquire the position informations around the terminal in real time, if a facility or a terminal does not exist for cent ralized management of positional information. This paper presents a procedu re for secure and efficient routing, where the positional information of th e terminal is acquired at an arbitrary time and is utilized differently acc ording to the elapsed time from its generation to its use. The usefulness o f the approach is shown by an approximate analysis and a computer simulatio n. (C) 2000 Scripta Technica.