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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/31782
標題: | iPTT:VoIP系統之點對點即按即說服務 iPTT:Peer-to-Peer Push-to-Talk Service of VoIP |
作者: | Jiun-Ren Lin 林俊仁 |
指導教授: | 逄愛君(Ai-Chun Pang) |
關鍵字: | 即按即說,點對點,網路語音服務, Push-to-Talk,Peer-to-peer,VoIP, |
出版年 : | 2006 |
學位: | 碩士 |
摘要: | 本論文提出一個VoIP系統上之點對點即按即說服務,稱之為iPTT。在iPTT上,我們展示了一個分散式並且不受限於行動通訊業者之網路架構,以加速PTT服務之推廣。基於我們提出的架構,我們也設計了通話建立及結束的訊息流程以展現iPTT架構的可行性。此外,我們提出兩種即時發話權決定機制,分別為Flooding-based Floor Control Mechanism (FFC) 與Tree-based Floor Control Mechanism (TFC)。對於所提出的發話權決定機制,透過我們所發展的數學分析與模擬模型來評估其效能。而其效能之優劣取決於決定過程所需的時間與訊息數量。 This thesis proposes iPTT, a peer-to-peer Push-to-Talk (PTT) service for Voice over IP (VoIP). In iPTT, a distributed and mobile-operator independent network architecture is presented to accelerate the deployment of the PTT service. Based on the proposed architecture, the message flows for call establishment/teardown are designed to show the feasibility of iPTT. Also, we propose two mechanisms for real-time talk-burst determination, flooding-based floor control mechanism (FFC) and tree-based floor control mechanism (TFC). In terms of the determination latency and the number of floor-control message exchanges, the performance of the proposed floor control mechanisms is investigated through our analytical and simulation models. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/31782 |
全文授權: | 有償授權 |
顯示於系所單位: | 資訊工程學系 |
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