ON triggering measurements in LTE-NR interworking

[0136] Embodiment 1 (Scenario 1: Before establishing a DC): A method in a user equipment (UE) capable of communicating between a first radio access node using a first radio access technology (RAT) and a second radio access node using a second radio access technology (RAT). operating under dual connectivity between a second radio access node of a radio access technology (RAT), and the UE is currently connected to the first node and is configured with s-measure by the first node, the The s-measure controls when the user equipment starts to perform measurement, and the method includes:

[0137] When the first node is configured to perform the measurement on the second RAT, no matter whether the s-measure standard of the first node is satisfied, the measurement on the second RAT is started.

[0138] Embodiment 2 (Scenario 2: After establishing a DC): A method in a user equipment (UE) operating between a first radio access node using a first radio access technology (RAT) and using a second radio access technology (RAT) operating under dual connectivity between a second radio access node of an access technology (RAT), the UE is currently connected to both the first node and the second node, and is configured with an s-measure of a node and another s-measure from said second node, said method comprising:

[0139] When the second node's s-measure criteria are met, measurements are started for all measurements configured on said second RAT, regardless of whether these measurements were configured by said first node or by said second node.

[0140]Embodiment 3. A method in a user equipment (UE) between a first radio access node employing a first radio access technology (RAT) and a second radio access node employing a second radio access technology (RAT) operating under dual connectivity between radio access nodes, the UE is currently connected to both the first node and the second node, and is configured with s-measure from the first node and from the Another s-measure of the second node, the method comprising:

[0141] a parameter (e.g., inter-RAT-sMeasureActivate) is maintained by the UE, which specifies the s-measure handling behavior during dual connectivity between two different RATs;

[0142] If the inter-RAT-sMeasureActivate parameter is set to true, when the s-measure criterion of the second RAT is satisfied, the measurement configured by the first node for the second RAT is started.