Differentiated service quality analysis based on QoS traffic prioritisation
Abstract
Abstract—This paper presents the results of a transmission quality study in a network with a DiffServ architecture. The
impact of differentiated services based on traffic prioritisation was studied. A carrier network model in a differentiated services
architecture with traffic prioritisation was designed and tested. The operator network used the OSPF protocol, while the client
networks communicated using the EIGRP protocol. Different traffic classes in the queueing systems were studied, influencing
delay and delay variation. Traffic generated with Exfo FTB- 860 test equipment was introduced into the designed network.
The measurement equipment used supported the ITUT Y.1564 measurement methodologies. The transmission quality was tested
according to the EtherSAM methodology and carried out in bidirectional mode. The tests showed the influence
of different data lengths on the transmission quality in the test network. The results proved that correctly implementing QoS mechanisms in the network makes it possible to ensure the required quality of service. It was shown that for delay-sensitive traffic, which fluctuates beyond its nominal speed, queuing systems allow transmission quality to be achieved with guaranteed bandwidth and delay.
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