| 摘要 |
A radio system has a plurality of base stations 10 - 13 with coverage areas 20 - 23 for communicating with mobiles 30. The base stations are sequentially operated, so that only one is operating at a time. If a base station is being used e.g. 10 then adjacent base stations 11 are placed in a "busy" mode. In channel busy mode, the base station transmits a predetermined signal at reduced power indicating that the channel is busy. This signal can be used to prevent mobiles attempting to gain access to a channel in situations where that channel is in use in another coverage area. <IMAGE> |
