Verification of Consistency between Ethernet Based QoS with Performance Prediction of Heterogeneous Microwave Radio-Relay Backhaul Network

In this paper, we observe a practical real-life 2-sections heterogeneous microwave radio-relay (RR) network comprising classic SDH and SDH NGN architecture, hybrid parallel and mutually independent transmission of native-Ethernet and TDM services, as well as all-IP network part, to experimentally benchmark them with the former testing of a 5-sections RR system connecting the same endpoints, with the goal to verify the previous results. Specifically, the main task of the both works was to answer whether quite a diverse RR system could satisfy the quality norms for Ethernet based services, meaning whether a tolerable RR unavailability will necessarily imply the according Ethernet QoS degradation? This question is addressed by the comprehensive in-service and out-of-service testing of an operational hybrid RR transmission system under test. After the undertaken extensive practical testing and appropriate analysis of the achieved results, it came out that the impact of RR - level impairments that determine the performance prediction, affected the Ethernet QoS to the extent of BER approaching the acceptability threshold values defining (un) availability. High consistency of the new RR system test results was found with the previous results, which therefore verifies the appropriateness of this approach.