Method and apparatus for managing measurement result in wireless communication system

A wireless device in a wireless communication system comprising:

• a transceiver;
• a memory;
• and
• at least one processor operatively coupled to the transceiver and the memory, and configured to:
• control the transceiver to receive, from a first cell, a measurement configuration comprising a first frequency list;
• obtain a measurement result for frequencies in the first frequency list based on a measurement on the frequencies in the first frequency list;
• store the measurement result for the frequencies in the first frequency list in measurement information;
• perform a cell reselection to a second cell;
• control the transceiver to receive, from the second cell, a measurement configuration comprising a second frequency list;
• obtain a measurement result for frequencies in the second frequency list based on a measurement on the frequencies in the second frequency list;
• store the measurement result for the frequencies in the second frequency list in the measurement information;
• identify at least one non-overlapping frequency that is included in the first frequency list and not included in the second frequency list;
• remove a measurement result for the at least one non-overlapping frequency stored in the measurement information while keeping the measurement result for the frequencies in the second frequency list stored in the measurement information;
• control the transceiver to receive, from the second cell, a report request of the measurement information;
• and
• control the transceiver to transmit, to the second cell, the measurement information including the measurement result for the frequencies in the second frequency list and not including the measurement result for the at least one non-overlapping frequency, upon the report request.

A processor for a wireless device in a wireless communication system, wherein the processor is configured to control the wireless device to perform operations comprising:

• receiving, from a first cell, a measurement configuration comprising a first frequency list;
• obtaining a measurement result for frequencies in the first frequency list based on a measurement on the frequencies in the first frequency list;
• storing the measurement result for the frequencies in the first frequency list in measurement information;
• performing a cell reselection to a second cell;
• receiving, from the second cell, a measurement configuration comprising a second frequency list;
• obtaining a measurement result for frequencies in the second frequency list based on a measurement on the frequencies in the second frequency list;
• storing the measurement result for the frequencies in the second frequency list in the measurement information;
• identifying at least one non-overlapping frequency that is included in the first frequency list and not included in the second frequency list;
• removing a measurement result for the at least one non-overlapping frequency stored in the measurement information while keeping the measurement result for the frequencies in the second frequency list stored in the measurement information;
• receiving, from the second cell, a report request of the measurement information;
• and
• transmitting, to the second cell, the measurement information including the measurement result for the frequencies in the second frequency list and not including the measurement result for the at least one non-overlapping frequency, upon the report request.