A method for use in user equipment "UE" comprising first and second radio technology components on a single platform, the method comprising: sending (3.1), to a radio access network, a coexistence request message conveying one or more proposed values of control parameters for establishing, for the first and second radio technology components, a coexistence mode having first and second signaling intervals for operating the first and second radio technology components, wherein sending the coexistence request message comprises sending an RRC signaling message to convey the one or more proposed values of control parameters, the one or more control parameters comprising 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 On-Interval parameter specifying a time duration for the first signaling interval, an Off-Interval parameter specifying a time duration for the second signaling interval, and a Possible Link parameter specifying a type of activity of the first radio technology component during the second signaling interval; receiving (3.2) a response message comprising values of said one or more control parameters (310, 312, 314, 318) for establishing the first and second signaling intervals for the first and second radio technology components; and operating the coexistence mode at the UE in accordance with the one or more control parameters, where the first and second signaling intervals are alternated during the coexistence mode; during the first 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; and during the second signaling interval, the second radio technology component is enabled to use radio resources on the UE without interference to/from the first radio technology component. sending (3.1), to a radio access network, a coexistence request message conveying one or more proposed values of control parameters for establishing, for the first and second radio technology components, a coexistence mode having first and second signaling intervals for operating the first and second radio technology components, wherein sending the coexistence request message comprises sending an RRC signaling message to convey the one or more proposed values of control parameters, the one or more control parameters comprising 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 On-Interval parameter specifying a time duration for the first signaling interval, an Off-Interval parameter specifying a time duration for the second signaling interval, and a Possible Link parameter specifying a type of activity of the first radio technology component during the second signaling interval; receiving (3.2) a response message comprising values of said one or more control parameters (310, 312, 314, 318) for establishing the first and second signaling intervals for the first and second radio technology components; and operating the coexistence mode at the UE in accordance with the one or more control parameters, where the first and second signaling intervals are alternated during the coexistence mode; during the first 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; and during the second signaling interval, the second radio technology component is enabled to use radio resources on the UE without interference to/from the first radio technology component. the first and second signaling intervals are alternated during the coexistence mode; during the first 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; and during the second signaling interval, the second radio technology component is enabled to use radio resources on the UE without interference to/from the first radio technology component.