Minimisation of drive test in a telecommunication network

A method performed by a base station in a wireless communication system, the method comprising:

• transmitting, to a terminal, a logged measurement configuration message for minimization of drive test (MDT);
• and
• receiving, from the terminal, a message including measurement results for the terminal in a radio resource control (RRC) idle state or an RRC inactive state based on the logged measurement configuration message, after an RRC connection between the terminal and the base station,
• wherein the measurement results include a measurement result for the MDT, in case that a field indicating for the terminal to log a measurement on an early measurement related frequency is absent in the logged measurement configuration message, and
• wherein the measurement results include a measurement result for the early measurement related frequency, in case that the field is present in the logged measurement configuration message.

A terminal in a wireless communication system, the terminal comprising:

• a transceiver;
• and
• a controller configured to:
• control the transceiver to receive, from a base station, a logged measurement configuration message for minimization of drive test (MDT),
• identify whether the logged measurement configuration message includes a field indicating for the terminal to log a measurement on an early measurement related frequency,
• perform measurement logging based on the identification, in case that the terminal is in a radio resource control (RRC) idle state or an RRC inactive state, and
• control the transceiver to transmit, to the base station, a message including measurement results based on the measurement logging, after the terminal is transitioned to an RRC connected state,
• wherein the measurement results include a measurement result for the MDT, in case that the field is absent in the logged measurement configuration message, and
• wherein the measurement results include a measurement result for the early measurement related frequency, in case that the field is present in the logged measurement configuration message.

A base station in a wireless communication system, the base station comprising:

• a transceiver;
• and
• a controller configured to:
• control the transceiver to transmit, to a terminal, a logged measurement configuration message for minimization of drive test (MDT), and
• control the transceiver to receive, from the terminal, a message including measurement results for the terminal in a radio resource control (RRC) idle state or an RRC inactive state based on the logged measurement configuration message, after an RRC connection between the terminal and the base station,
• wherein the measurement results include a measurement result for the MDT, in case that a field indicating for the terminal to log a measurement on an early measurement related frequency is absent in the logged measurement configuration message, and
• wherein the measurement results include a measurement result for the early measurement related frequency, in case that the field is present in the logged measurement configuration message.