Prediction model of QoS for Triple play services

Abstract

The aim of this work is to design an application utilizing the QoS prediction model for Triple play services, the input parameters of which are used QoS policies and network state. In order to analyze the efficiency of individual policies designed for serving the packet queues, it was necessary to perform practical measurements in an overloaded network and monitor the total network delay, Jitter and packet loss. Results of the measurements after the conformance check were used for purposes of creating QoS prediction models for each type of service (voice, video and data).

Prediction Model of Triple play services for QoS Assessment in IP Based Networks

“…This paper follows directly our previous experiments studying the impact of full network utilization and performance of data prioritization on the final quality of service [5]. In [5], we introduced and described tools enabling analysis of quality of triple-play services. In this work, we focused on improvements and addition of a model calculation.…”

“…Since the final delay and packet loss are factors depending on full network utilization and QoS policy applied to prioritized data flow processing by routers, it is necessary to consider this link as well. Related works [5][6][7] and [11] analyse in detail the impact of network utilization and usefulness of policies settings on a variable component of total delay. Congestion management features allow internet service provider to control congestion by determining the order in which packets are sent out an interface based on priorities assigned to those packets.…”

“… Bandwidth -This expresses the capacity of the transmission channel.  Delay -This is caused by overcrowding the packet queue on the outgoing interface [5].…”

“…The decrease in QoS, altogether with the analyzed impact of packet loss on the final quality of the video, was processed into following regressive equations in which X stands for percentage packet loss ratio in network. Verification of these mentioned formulas are published in our paper [5]. These formulas were extended by the analyses of impact of video type sequences.…”

“…Since the application focuses on the whole scale of Triple play services, there is one service leftdata. We have dealt with this service as well in previously mentioned paper [5], which detected the ratio between network capacity and actually reached speed of ftp service with regard to utilization and implemented QoS policy. Overall application settings:…”