| 摘要 |
A system and method for determining at a cellular station a dedicated control channel (DCCH) frequency of a digital private communications system including determining a DCCH frequency set which is less than all frequencies designated for DCCHs of cellular communications systems. The select DCCH frequency set is stored in a private base station memory of the digital private communications system. A digital private communications system DCCH is operated using only the frequencies within the select DCCH frequency set, and the select DCCH frequency set is scanned at the cellular station to locate the digital private communications system DCCH. An indication such as a "flag" is provided at a public base station, indicating the presence of the digital private communications system. The flag is transmitted from the public base station to the mobile cellular station, where the mobile cellular station scans the select DCCH frequency set only where the indication indicates the presence of the digital private communications system. A cellular station timer for measuring a predetermined time period triggers automatic scanning of the select DCCH frequency set by the mobile cellular station at intervals of the predetermined time period. |
