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題 名 | VoIP與Managed IP整合網路之性能評估分析=Performance Analysis of a VoIP and Managed IP Integrated Network |
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作 者 | 蔡季薇; 唐崇實; 鄒應殿; 塗清芸; 余聲旺; | 書刊名 | 電信研究 |
卷 期 | 36:3 民95.06 |
頁 次 | 頁297-314 |
分類號 | 448.6 |
關鍵詞 | 網路IP化; PSTN; VoIP; Managed IP; QoS; MPLS VPN; Performance; |
語 文 | 中文(Chinese) |
中文摘要 | PSTN (Public Switched Telephone Network)網路IP (Internet Protocol)化是電信界的趨勢。初期實驗階段的VoIP(Voice over IP)網路通常為一封閉式網路,然而經過一段實驗試用後,將此封閉式VoIP網路,整合至一營運業者管控下具QoS(Quality of Service)管理功能的IP網路(Managed IP)有其必要性與效益,但在整合之前必須進行可行性與性能評估。若VoIP整合至Managed IP後,使用MPLS VPN(Multiple Protocol Label Switching/Virtual Private Netowrk) 替代專線,因共用高可用度與具QoS機能的IP骨幹,可以提昇服務彈性、簡化網路以及降低營運成本。 本文首先介紹Voice over MPLS之重要性,然後說明VoIP與Managed IP整合網路,然下來針對VoIP與Managed IP整合網路,建立MPLS VPN模擬模式並加以驗證,然後作性能評估分工 。最後在同樣訊務模式下,比較原封閉式VoIP網路架構和VoIP與Managed IP整合網路架構之模擬分析結果與性能評估之差異。性能評估項目主要包括整個網路的End-to-End Delay、Delay Variation和 Link Utilization三方面。 |
英文摘要 | PSTN integrated to IP network is a trend in the telecommunication community. At experimental stage, VoIP is usually built on an isolated IP network. However, after trial period, the isolated VoIP network is suggested to integrate within the operator’s QoS-enabled Managed IP network. The integration approach of replacing the leased lines by MPLS VPN is proposed. The leased lines typically interconnect nodes at different sites in an isolated VoIP network and the MPLS VPN is provided in the Managed IP network. The approach is expected to promote the flexibility of service, simplify the network and reduce the cost of QA&M, owing to sharing the high availability and QoS-enabled IP network backbone. Nevertheless, The feasibility and performance should be evaluated before integration. This article introduces the importance of Voice over MPLS at first. Then, a VoIP and Managed IP integrated network is explained and the alternatives of VoIP integration with Managed IP are presented. Next, the simulation model of integrated MPLS VPN is constructed and verified, and the performance evaluation follows. Finally, in the same condition of traffic model, the results of performance analysis are compared between original VoIP network and integrated VoIP over Managed IP network. The performance metrics of interest include End-to-End Delay, Delay Variation and Link Utilizaiton. |
本系統中英文摘要資訊取自各篇刊載內容。