Method and system for determining a quality of experience during a real-time communication session

A method for determining, in a communication system, a Quality of Experience associated with a real-time communication session between user devices of the communication system, the method comprising:

• starting the real-time communication session;
• monitoring the real-time communication session and determining, during the real-time communication session, at least one quality indicator indicative of the Quality of Experience, and at least one first performance indicator indicative of a Quality of Service and at least one second performance indicator indicative of the Quality of Service;
• based on a self-learning process to which the at least one quality indicator and the at least one first performance indicator are applied, determining and continuously updating a correlation function indicative of the correlation between the Quality of Experience and the Quality of Service in respect of the monitored real-time communication session;
• determining, a parameter of the Quality of Service depending on both the at least one first performance indicator and the at least one second performance indicator, and
• applying said parameter to the correlation function to determine said Quality of Experience,
• wherein said determining a correlation function includes determining a value of at least one coefficient of the correlation function based on a previous value of the coefficient of the correlation function, and
• said parameter comprises an effective packet loss depending on jitter, packet loss and jitter buffer size.

A communication system comprising:

• at least one measurement device configured to monitor and perform measurements on a real-time communication session between user devices of the communication system thereby allowing to determine, during the real-time communication session, at least one quality indicator indicative of a Quality of Experience, and at least one first performance indicator indicative of a Quality of Service and at least one second performance indicator indicative of the Quality of Service;
• and
• a processing device configured to, based on a self-learning process to which the at least one quality indicator and the at least one first performance indicator are applied, determine and continuously update a correlation function indicative of the correlation between the Quality of Experience and the Quality of Service in respect of the monitored real-time communication session, determine a parameter of the Quality of Service depending on both the at least one first performance indicator and the at least one second performance indicator, and apply said parameter to the correlation function to determine said Quality of Experience,
• wherein in determining the correlation function, the processor determines a value at least one coefficient of the correlation function based on a previous value of the coefficient of the correlation function, and
• the at least one second performance indicator comprises jitter buffer size.