7Broadband QoS Parameters, KPIs, and Measurements

Broadband and ultra‐broadband access networks provide capabilities for delivery of various services toward end‐users, which can have different QoS and QoE requirements. To define the requirements for a given service there is required a set of QoS parameters, which are important to all parties in the value chain, including service providers, networks providers, equipment vendors, and end‐users. Most important QoS parameters, which describe the service requirements and can be measured and understood by the end‐user (i.e. the customer), are referred to as key performance indicators. There are service dependent QoS parameters and hence service dependent KPIs, as well as service independent QoS parameters (e.g. mobile network radio coverage) and hence service independent KPIs. All selected technical QoS parameters as KPIs are subject to measurements, which can be performed by all parties in the value chain.

7.1 QoS, QoE, and Application Needs

In the all‐IP world each service includes an application (e.g. VoIP is a service that uses voice application running on the top of RTP/UDP/IP protocol stack). The relationship between network layer QoS and the obtained QoE (this refers mainly to services used by humans) is strongly dependent on the given service and its application. The following are typical examples regarding QoS requirements of some services (Figure 7.1):

  • Email is delay tolerant but requires lossless transmission on the application ...

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