Research Article
Towards a QoE-Driven Resource Control in LTE and LTE-A Networks
Table 2
Summary of KPIs to be measured at each protocol layer.
| Layer | KPI/parameter |
| Signaling | Attach delay | EPS bearer establishment delay |
Transport
| TCP advertised window (ADWN) | TCP maximum segment size (MSS) | Network | Average RTT | RTT variance | IP packet loss rate | IP packet sizes | Application | | Web browsing | Average throughput at application layer () | Web page downloading time () | DNS resolution time | VoIP (E-model) | End-to-end delay at application level () | Loss probability at application level () | Video YouTube (HTTP/TCP) | Video buffer size () | Buffer length when the player paused () | Video bitrate () | Video length () | Average TCP goodput () | Number of empty-buffer events () |
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