A method implemented by a network node in a communication network of predicting a current value of a performance measurement indicative of network performance in a situation where current performance measurements are not available, the method comprising: obtaining a daily trend in a series of performance measurements, the daily trend comprising a set of data points at different times of day, wherein each data point represents an average value of the series of performance measurements at a corresponding time of the day over a plurality of days; obtaining one or more recent performance measurements over a recent time interval; predicting, based on the daily trend and the one or more recent performance measurements, the current value of the performance measurement; and controlling a network function based on the predicted current value of performance measurement, wherein controlling the network function comprises controlling admission of user terminals to the communication network based on the predicted current value of the performance measurement, wherein controlling the admission of the user terminals to the communication network comprises determining an admission threshold based on the predicted current value of the performance measurement, and admitting the user terminals to the communication network based on the admission threshold, wherein obtaining the one or more recent performance measurements over the recent time interval comprises obtaining performance measurements over a past predetermined time period, and wherein the daily trend comprises a weekday trend based on performance measurements over a plurality of weekdays, and/or a calendar day trend based on performance measurements taken on the same calendar day over a plurality of weeks. obtaining a daily trend in a series of performance measurements, the daily trend comprising a set of data points at different times of day, wherein each data point represents an average value of the series of performance measurements at a corresponding time of the day over a plurality of days; obtaining one or more recent performance measurements over a recent time interval; predicting, based on the daily trend and the one or more recent performance measurements, the current value of the performance measurement; and controlling a network function based on the predicted current value of performance measurement, wherein controlling the network function comprises controlling admission of user terminals to the communication network based on the predicted current value of the performance measurement, wherein controlling the admission of the user terminals to the communication network comprises determining an admission threshold based on the predicted current value of the performance measurement, and admitting the user terminals to the communication network based on the admission threshold, wherein obtaining the one or more recent performance measurements over the recent time interval comprises obtaining performance measurements over a past predetermined time period, and wherein the daily trend comprises a weekday trend based on performance measurements over a plurality of weekdays, and/or a calendar day trend based on performance measurements taken on the same calendar day over a plurality of weeks.