A method for use in user equipment, UE, comprising first and second radio technology components on a single platform, comprising: sending a coexistence request message (9.2), wherein the coexistence request message includes one or more proposed control parameters for establishing a coexistence mode having a fixed coexistence cycle duration that includes variable first and second signaling intervals within the fixed coexistence cycle duration for the first and second radio technology components, the fixed coexistence cycle duration shared by the first and second radio technology components; receiving a response message (9.2) comprising one or more control parameters for configuring the variable first and second signaling intervals within the coexistence cycle duration for the first and second radio technology components; enabling the first radio technology component with the one or more control parameters to use radio resources on the UE during at least the variable first signaling interval within the coexistence cycle duration without interference to or from the second radio technology component; and enabling the second radio technology component with the one or more control parameters to use radio resources on the UE during the variable second signaling interval within the coexistence cycle duration without interference to or from the first radio technology component, where the one or more control parameters comprise an extension parameter indicating that the UE is to use the variable first signaling interval as opposed to a fixed first signaling interval; and, where enabling the first radio technology component comprises extending the variable first signaling interval into an extended first signaling interval upon detecting an extension event so that the first radio technology component is enabled to use radio resources on the UE during the extended first signaling interval without interference to or from the second radio technology component. sending a coexistence request message (9.2), wherein the coexistence request message includes one or more proposed control parameters for establishing a coexistence mode having a fixed coexistence cycle duration that includes variable first and second signaling intervals within the fixed coexistence cycle duration for the first and second radio technology components, the fixed coexistence cycle duration shared by the first and second radio technology components; receiving a response message (9.2) comprising one or more control parameters for configuring the variable first and second signaling intervals within the coexistence cycle duration for the first and second radio technology components; enabling the first radio technology component with the one or more control parameters to use radio resources on the UE during at least the variable first signaling interval within the coexistence cycle duration without interference to or from the second radio technology component; and enabling the second radio technology component with the one or more control parameters to use radio resources on the UE during the variable second signaling interval within the coexistence cycle duration without interference to or from the first radio technology component, where the one or more control parameters comprise an extension parameter indicating that the UE is to use the variable first signaling interval as opposed to a fixed first signaling interval; and, where enabling the first radio technology component comprises extending the variable first signaling interval into an extended first signaling interval upon detecting an extension event so that the first radio technology component is enabled to use radio resources on the UE during the extended first signaling interval without interference to or from the second radio technology component.