QoE Evaluation of Scheduling Algorithms for NRT Services in LTE
نویسندگان
چکیده
An interesting approach for designing scheduling algorithms in OFDMA systems consists on incorporating a utility function that maps a certain resource or performance criterion into a value that measures the degree of user satisfaction. The current paper proposes a utility function that maps the user data rate into the quality of experience (QoE) perceived by the end user. The utility function is derived from a subjective survey of user experience quality for the Web browsing application for different service response times. The obtained utility function shows a similar slope to the natural logarithm function in the range of 100 kbps to 1Mbps, but it differs for higher data rates. Here, the utility function is applied in the evaluation of versions of the Generalized Proportional Fair (GPF) scheduler with different degrees of fairness in 3G LTE. It is shown that the application of the utility function allows the evaluation of the subjective user satisfaction provided by the GPF scheduler.
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