DATA UNIT DELAY MEASUREMENT

There are provided measures for data unit delay measurement. Such measures exemplarily comprise, at a controlling component of a network assembly providing wireless communication access to a network, the controlling component controlling a plurality of controlled components of said network assembly and being connected to at least a first controlled component of said plurality of controlled components: monitoring, in a measurement period, arrival of downlink transmission data units at said network assembly, registering, based on said monitoring, times of arrival of said downlink transmission data units at said network assembly within said measurement period, generating information indicative of said times of arrival of delivery confirmed downlink transmission data units out of said downlink transmission data units, and transmitting said information indicative of said times of arrival to a network analysis entity.