TWAREN網路服務等級契約之研究

Abstract

新一代的TWAREN網路提供高速網路服務與品質保證，同時納入服務等級契約之機制，規範其所宣稱的服務品質，利用統計資料和機率中的Probability Density Function (PDF)和Cumulative Distribution Function (CDF)評估可能的指標，同時比較TWAREN由Production Network換至Research Network服務參數差異。分析PDF是那些連結造成pulse，評估可能的因素，利用CDF和內差法，研究如何擬訂服務等級契約中服務品質參數。分析的結果我們發現骨幹切換前後Average Round Trip Time (RTT)降低約1.5%，Packet Loss Rate (PLR)降低約42%，而整體可用率(Availability)提高約0.08%。最後我們建議TWAREN服務等級契約(Service Level Agreement, SLA)之服務品質參數的擬訂，Average RTT為9.44 (ms)、PLR為0.89%、Availability為99%，提供未來與TWAREN網路營運汲汲相關的網路管理策略與新世代營運管理系統進行規劃。The next generation network, TWAREN, provides the wideband network service and guarantees qualities of services (QoS). Likewise, it embraces the mechanism of SLA which guarantees for QoS claimed. The research exploits PDF and CDF in the statistics and probability to estimate the likely index of QoS. We also compare the performances of the Production network with Research network and try to comprehend which factors may cause the pulses on the plots. Consequently, we observe that AvgRTT is lower 1.5%, PLR gets lower 42% and Availability is higher 0.08% as compared to Production network. Ultimately, we recommend that TWAREN network can draft Average RTT as 9.44ms, PLR as 0.89% and Availability as 99%. These metrics can supply the related policies of network management and the service operations for TWAREN in the future.