Lecture: User-Network Interplay and Performance Assessment Methods in Future Internet Design

Author: Prof. Dr.-Ing. Phuoc Tran-Gia, University of Würzburg, Institute of Computer Science, Chair of Communication Networks

Date: 8 May (Thursday), 11:15

Where? Room 38/39 C4


The Internet offers an increasing diversity of distributed applications and services over various media. Especially, the popularity of smartphones and mobile applications has experienced a considerable growth expected to continue in the future. Understanding and measuring quality of Internet services and underlying networks from an end-user perspective has attracted strong attention which is caused by increased competition among stakeholders i.e. application and service provider, cloud provider, network provider, hardware vendor. Nevertheless, the interplay between users (or applications) and the network (and the related stakeholders) is not fully integrated in the deployed services, the current Internet technology, or the networking solutions. Based on different examples, the need for a new thinking and solutions regarding the user-network interplay in the Future Internet is derived. Current trends are observed and discussed in the talk.

First, signaling storm in mobile networks in considered, to be more precise the tradeoff between energy consumption at the smartphone and the generated signaling traffic in the mobile network. Since smartphones have only very limited energy resources, battery efficiency is one of the determining factors for a good user experience. However, these trends create conflicting, challenging demands on the stakeholders involved. In particular, this tradeoff is controlled by the mobile network configuration but also by the actual application traffic characteristics and directly influences QoE of the considered smartphone app. Nevertheless, the interaction between the network and the application is not considered in today’s networking solutions or application deployment process.

In the second part of the talk, a QoE model for YouTube video streaming is presented as basis for QoE monitoring and optimization. A concrete solution is exemplary demonstrated for wireless access networks. For the evaluation of the interaction between user, applications, and networks, research concepts are discussed taking a closer look as crowdsourcing and experimental facilities as enabling tools. Nevertheless, the question arises whether to follow application-aware network design or network-aware application design. For the future Internet, a paradigm change is foreseen to properly address the user-network interplay.