Quantifying QoS requirements of network services

Kuan-Ta Chen, Chen-Chi Wu, Yu-Chun Chang, Chin-Laung Lei
2011 Proceedings of the second annual ACM conference on Multimedia systems - MMSys '11  
Despite all the efforts devoted to improving the QoS of networked multimedia services, the baseline for such improvements has yet to be defined. In other words, although it is well recognized that better network conditions generally yield better service quality, the exact minimum level of network QoS required to ensure satisfactory user experience remains an open question. In this paper, we propose a general, cheat-proof framework that enables researchers to systematically quantify the minimum
more » ... oS needs for real-time networked multimedia services. Our framework has two major features: 1) it measures the quality of a service that users find intolerable by intuitive responses and therefore reduces the burden on experiment participants; and 2) it is cheat-proof because it supports systematic verification of the participants' inputs. Via a pilot study involving 38 participants, we verify the efficacy of our framework by proving that even inexperienced participants can easily produce consistent judgments. In addition, by cross-application and cross-service comparative analysis, we demonstrate the usefulness of the derived QoS thresholds. Such knowledge will serve important reference in the evaluation of competitive applications, application recommendation, network planning, and resource arbitration. 1 Here by network QoS we refer to the service level of network data delivery, including network bandwidth, network delay, packet loss rate, to name a few.
doi:10.1145/1943552.1943563 dblp:conf/mmsys/ChenWCL11 fatcat:vyj7usfebbej5dgtkxqlbdfsfq