| 摘要 |
PURPOSE: To improve economics and to prevent the appearance of a building, etc., from being impaired by preventing the base stations of plural mobile communication networks from being installed in duplication. CONSTITUTION: Shared base stations ICS1, ICS2,... are arranged in a service area common among plural mobile communication networks. and a connection control signal destinated for the plural mobile communication networks is transmitted/received in time division and at a random repeated frequency intermittently by the shared base stations ICS1, ICS2,.... In such a case, the transmission power level of the connection control signal destinated for the plural mobile communication networks is set independently and variably corresponding to the range of a radio zone to be set at each of the shared base stations ICS1, ICS2,.... |
