A method for use in user equipment "UE" comprising first and second radio technology components on a single platform, the method comprising: receiving (9.2) one or more control parameters (910, 912, 914, 918) for establishing a coexistence mode having a coexistence cycle of a fixed duration, the coexistence cycle comprising variable first and second signaling intervals for operating the first and second radio technology components wherein receiving the one or more control parameters comprises receiving an RRC signaling message conveying the one or more control parameters and the one or more control parameters comprise a Start Time Offset parameter specifying a start time for the coexistence mode, a Keeping Time parameter specifying an end time for the coexistence mode, an Initial On-Interval parameter specifying an initial time duration for the variable first signaling interval, a Coexistence Cycle parameter specifying a time duration of periodic repetition of the variable first and second signaling intervals, a Maximum Ratio parameter specifying a maximum value for a ratio of the variable first signaling interval to the fixed coexistence cycle duration, and a Possible Link parameter specifying a type of activity of the first radio technology component during the second signaling interval; and operating the coexistence mode on the UE in accordance with the one or more control parameters, where during each coexistence cycle of the coexistence mode: the first radio technology component is enabled to use radio resources on the UE without interference to/from the second radio technology component during the variable first signaling interval; and the second radio technology component is enabled to use radio resources on the UE without interference to/from the first radio technology component during the variable second signaling interval. receiving (9.2) one or more control parameters (910, 912, 914, 918) for establishing a coexistence mode having a coexistence cycle of a fixed duration, the coexistence cycle comprising variable first and second signaling intervals for operating the first and second radio technology components wherein receiving the one or more control parameters comprises receiving an RRC signaling message conveying the one or more control parameters and the one or more control parameters comprise a Start Time Offset parameter specifying a start time for the coexistence mode, a Keeping Time parameter specifying an end time for the coexistence mode, an Initial On-Interval parameter specifying an initial time duration for the variable first signaling interval, a Coexistence Cycle parameter specifying a time duration of periodic repetition of the variable first and second signaling intervals, a Maximum Ratio parameter specifying a maximum value for a ratio of the variable first signaling interval to the fixed coexistence cycle duration, and a Possible Link parameter specifying a type of activity of the first radio technology component during the second signaling interval; and operating the coexistence mode on the UE in accordance with the one or more control parameters, where during each coexistence cycle of the coexistence mode: the first radio technology component is enabled to use radio resources on the UE without interference to/from the second radio technology component during the variable first signaling interval; and the second radio technology component is enabled to use radio resources on the UE without interference to/from the first radio technology component during the variable second signaling interval. the first radio technology component is enabled to use radio resources on the UE without interference to/from the second radio technology component during the variable first signaling interval; and the second radio technology component is enabled to use radio resources on the UE without interference to/from the first radio technology component during the variable second signaling interval.