| 摘要 |
PURPOSE:To perform mobile switching without interrupting speech even when the service area of a base station is changed while the speech is being performed in a mobile communication system for broad band cordless telephone in a building connected to an exchange and city area. CONSTITUTION:A purpose can be attained by learning a cell boundary line where electric field strength between the base stations (1, 2, and 3) are set equal by a central station (15) in advance, and calculating the position and the travel speed of mobile machines (7, 8) by measuring the electric field strength of the mobile machines. In such a way, (a) the arithmetic rule of the mobile machine can be simplified even in the building in which cell shape is complicated, and (b) urgency can be decided by calculating a time when the mobile machine arrives at the boundary line, which reduces arithmetic processing quantity, and also, (c) it is possible to realize soft mobile switching for the switching of the base station with a simple arithmetic rule and to improve speech quality. |
