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    • 34. 发明授权
    • Transmitter outage reporting
    • US11323958B2
    • 2022-05-03
    • US16085765
    • 2017-02-24
    • British Telecommunications Public Limited Company
    • Dalia Abouelmaati
    • H04W52/02H04W4/20H04W40/24
    • If a cellular base station detects that it is about to shut down, either because no mobile terminals are within range, or because of a loss of power, for example because a user has deliberately switched it off, it first broadcasts a report that is about to shut down. This broadcast signal is picked up by the neighboring cells and used to update their neighbor lists, thus avoiding a false alarm which would otherwise be generated by the neighbors and transmitted to a centralized Operation Administration and Maintenance system when the shut-down cell fails to be detected on the next sampling cycle. The neighbors can then retain the shut-down base station in the neighbor list. The cause of the shut-down may be identified in the shut-down report, and a self-organizing frequency reuse plan adjusted if the base station is shut down altogether (for example because of a loss of power) but remain unchanged if the base station is continuing to operate in receive-only mode because no mobile terminals are within its range. The base station has a standby battery which allows a “graceful” shutdown even if the main power supply is cut off.