1) Which layer(s) carry out QoS execution? And what are the Key Performance Indicators (KPIs) related to QoS?
Quality of Service (QoS) provisioning has become indispensable in today’s networks. Most existing QoS solutions are deployed in Layer 3 (network layer). In order to provide end-to-end QoS guarantees in these networks, the need for Layer 2 QoS deployment and well the cooperation between any existing Layer 3 QoS deployment is must.
KPI greatly varies geographicaly accross countries. Some of them are:
Totality of characteristics of a telecommunication service that bear on its ability to satisfy stated and implied needs of the user of the service.
And quality of network performance is Network ability to offer the functions matching the communications between users. The quality of network performance contributes towards the better service as experienced by the user. In mobile communication systems, network performance may be evaluated according to an end to end basis or not, in which scenario the quality of the transmission network and access network must be separated.