Patent ID: 6819940
Filing Date: 2004-11-16
Classification: H04B,H04W

Abstract:
A first mobile communications system, comprising:a mobile communications terminal capable of switching between at least two different mobile communications systems, including a first mobile communications system, and establishing communication with a mobile communications system to which said mobile communications terminal has switched; and at least one base station independent of a secondary medium and capable of establishing communication with said mobile communications terminal, said base station receiving channel information for other mobile communications systems and including transmitting means for transmitting said channel information to said mobile communications terminal; said mobile communications terminal including channel information storage means for receiving and storing said channel information from said base station when said mobile communications terminal is in communication with said first mobile communications system, said mobile communications terminal being able to establish a communication connection with one of the other mobile communications systems based on the stored channel information when needed, wherein said base station includes channel information storage means for storing the channel information on the other mobile communications systems, said storage means extracting the channel information on each of a plurality of cells provided by said base station so that cells illuminated by extracted corresponding channels cover each of said plurality of cells and the vicinity of each of said plurality of cells, from said channel information on the other communications systems, and storing the extracted channel information therein.