| 摘要 |
PURPOSE:To improve the efficiency of the line without the occurrence of received data in duplicate even when a mobile station receiving the data moves between zones by sending a recall request from the mobile station via a base station and giving a required command from a central management station. CONSTITUTION:When a mobile station M1 moves from a service zone of a 1st base station B1 to a service zone of a 2nd base station B2, a recall request (m+1) including the communication content of the station B1 is sent from a station M1 to a station B2 and the request is sent from the station B2 to a central management station C1. The station C1 commands (recall command) the the interruption of communication with the station B1 having communicated so far and receives the transmission information of the communication (pre- communication information (m)). Then the station C1 receives the information to teach the transmission information data ((m+1)-th block) to the station B2 and the station B2 sends the transmission information from the station C1 to the station M1 (recall reply m+1). Thus, even when the mobile station moves between zones during data reception, no duplicate reception data takes place and the line efficiency is improved. |
