Studying Quality of Experience (QoE) over Wireless Networks

Studying Quality of Experience (QoE) over Wireless Networks

Ioannis Mavromatis (University of Bristol, UK) and Periklis Chatzimisios (CSSN Research Lab, Department of Informatics, Alexander TEI of Thessaloniki, Greece)
Copyright: © 2015 |Pages: 11
DOI: 10.4018/978-1-4666-5888-2.ch620
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Background

As stated earlier, QoE is subjective, user-centric and content-dependent. Now is the time that QoS firstly, and more terms later come into foreground. Under QoS the idea is that transmission rates, error rates and other characteristics can be measured, improved and guaranteed in advance. By using parameters as bit rate, jitter, delay, packet loss, a service can be described and evaluated. Later in this article, the differences between QoS and QoE will be discussed in more detail.

In addition with QoS, the term Class of Service (CoS) can also be found in the literature in order to describe the semantics and parameters of a specific type of QoS. Applications and services are categorized as symmetrical or asymmetrical judging by the equality of the bandwidth in both uplink and downlink directions. Also elastic and non-elastic characterizations where used, based on the minimum level of bandwidth needed and finally interactive and non-interactive depending on the human contact with a service.

Grade of Service (GoS) describes all the phenomena occurring during connection setup, release and maintenance. It appears mostly in circuit switched optical services and is the probability of the service to be blocked or delayed for more than a specific interval due to the high traffic intensity and the lack of available resources.

Finally, Quality of Resilience (QoR) is perceived as one of the dimensions of QoS and covers the gray areas when a service is operational but not fully functional and is characterized as degraded. Approaches related to QoR are not well formalized as the ones in QoS, CoS, or GoS.

Key Terms in this Chapter

Wireless Networks: Any type of computer networks that uses wireless data connections for connecting the network nodes.

Metrics: A system of related measurements that facilitates the quantification of some particular characteristics

Quality of Service: The measurement of the network characteristics seen by a user by using quantitative measures.

Quality of Experience: The measurement of the perceived quality of a service from a costumer and is related to costumer’s experience.

QoE Challenges: The obstacles and drawbacks that need to overcome in order an end-to-end service to be successfully launched and widely used.

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