Nippon Telegraph and Telephone Corporation

Jiro Itano

Koji Yamamoto

Hiroshi Sawada

Noriteru Shinagawa

A mobile communication system comprises at least one mobile switching center for accommodating through respective networks a plurality of radio base stations each having an independent radio zone area, the mobile switching center being connected to a telephone through a wire speech path, a mobile station connectable to each of the radio base stations through a radio speech channel; and a multi-connecting device contained in the mobile switching center and having a network between the switching center and an old base station left by the mobile station during communication, a network between the mobile switching center and a new base station entered by the mobile station, and a wire speech path between the mobile switching center and the telephone. When the mobile station moves across adjacent radio zone areas of base stations during communication, the mobile switching center detects the movement of the mobile station to cause the multi-connecting device to multi-connect the aforementioned networks and wire speech path so that a channel is changed while maintaining the communication of the mobile station.

Growing community of inventors

Tokyo, Japan

Jiro Itano