The present document captures the findings of the Study on further enhancements of Minimization of Drive Tests (MDT) for E-UTRAN.

The objective of the study is to investigate technical solutions for MDT enhancements, limited to aspects that can be observed at access stratum. In particular the following:

• Enhanced QoS Verification Use Case:
  • Study MDT measurements and procedures capabilities to support better understanding of the QoS and its limiting factors for MMTEL voice and video traffic, including:
  • Study necessary MDT measurements and procedures capabilities for assessing the performance of MMTEL voice and video, e.g. delay, packet loss rate of PDCP layer.
  • Study necessary MDT measurements and procedures capabilities for mobility performance of MMTEL voice and video (e.g. add tags to the existing RLF report in order to derive the particular MMTEL voice and video traffic failures).
  • Study necessary MDT measurements and procedures capabilities for identifying hotspot areas of MMTEL voice and video.
• Enhanced Coverage Optimization Use Case:
  • Consider provision of additional feedback from UE handling diverse capabilities that impact MDT measurement results (e.g. new type of assistance information such as IDC, etc) and analyze what benefit such information could achieve.

The present document provides descriptions and possible solutions of use cases and analysis of these solutions.