Section: F.1 QoS monitoring for assurance
Content: This Clause discusses how QoS monitoring information can be used for assurance purposes. For background information on assurance see [19] and appendix A.3 in [20]. Assurance consists of four major steps (see Figure F.1-1 and [18]): Customer's QoS requirements These state the level of quality required by the customer of a service. This information is divulged to the provider. Service provider's offerings of QoS (or planned/targeted QoS) This is a statement of the level of quality expected to be offered to the customer by the service provider. QoS achieved/delivered This is the level of quality achieved and delivered to the customer. Monitoring information is divulged to the customer. Customer rating of QoS The customer can compare the QoS achieved by the provider with the QoS requirements (see above) and its own experience of the QoS. This is a crucial step for establishing assurance about the fulfillment of the customer's requirements. Figure F.1-1: QoS assurance by use of QoS monitoring information NOTE: This Figure is based on the trust model in reference [18]. The start time and the duration of the QoS monitoring is specified in the parameter observation time interval, which is exchanged between the customer, for instance an application consuming a communication service, and the provider (for instance a private 5G network providing a communication service). The observation time interval is the time interval during which a series of measurements is conducted. In the context of QoS monitoring, these are the measurements necessary for assessing the QoS of communication services, for instance the measurement of end-to-end latencies. Examples of parameters to be monitored by the provider are given in annex C in reference [36].