| 摘要 |
<p>A method and apparatus is provided for facilitating scanning of radio control channels where a plurality of communication systems (106, 114) conjunctively cover the same area. A subscriber unit (116) receives an overhead message train on a control channel which includes a channel count representing the number of control channels of a communication system (114). Subsequently, the subscriber unit (116) scans a channel count number of control channels to tune to a control channel being used by a communication system (114) having coverage for the subscriber unit (116). This scanning of control channels starts with a predermined start control channel which corresponds to the logical number of the control channel in a sequence of control channels which is after the channel count control channel. In addition, an apparatus may be provided to transmit, in the overhead message train, a subscriber unit control message with an address indicating that a communication system (114) is operating within a coverage area.</p> |
