Methods for quality of service monitoring, policy enforcement, and charging in a communications network, are disclosed. The methods include mapping quality of service parameters to measured parameters of a real-time video or packet data unit flow. The mapping may be used to monitor bursty traffic to adhere to quality of service requirements, perform traffic shaping, and for use in reporting certain network events. The measured parameters of real-time packet data unit flow include a first bit rate measured over a short-term measurement window and a second bit rate measured over a long-term measurement window. The short-term and long-term measurement windows are differently sized.