Patent ID: 8731543

Claim:
A method of reporting logged measurements in a wireless communication system, the method comprising: receiving, by a user equipment from a cell of a first radio access technology (RAT), a minimization of drive tests (MDT) configuration; logging, by the user equipment, measurements based on the MDT configuration in order to collect the logged measurements; transmitting, from the user equipment to a cell of a second RAT, a logging indicator indicating an existence of the logged measurements based on the received MDT configuration from the cell of the first RAT; receiving, by the user equipment from the cell of the second RAT, a reporting request for reporting the logged measurements, wherein the reporting request includes information indicating that the MDT configuration is received from the cell of the first RAT, wherein the reporting request further includes another information related to the first RAT; and in response to the reporting request, transmitting, by the user equipment to the cell of the second RAT, a measurement result including the logged measurements.