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  • 學位論文

線性模式之行動資料傳輸效能分析

Performance of Linear-Type Mobile Data Transmission

指導教授 : 林一平 張明峰

摘要


在新世代網路(Next Generation Network)中,網際網路 IP 多媒體子系統(IP Multimedia Subsystem)負責提供多媒體服務。在中華電信的 NGN/IMS 環境下,我們已經開發出多種線 性模式之資料傳輸(linear-type data transmission)應用服務,像是電子布告欄系統及論壇網 站,這些應用服務會持續傳送新的文章給行動用戶。我們提出 push-N 方法,應用在這類型 的資料傳輸上以提升效能。在 push-N 方法中,當電子布告欄系統的伺服器每收到 N 篇文 章就推送(push)給行動用戶,因此當行動用戶開啟電子布告欄開始閱讀公告時,只需要下 載(pull)尚未推送下來的文章。我們的研究顯示選擇適當的 N 值,可以在 push 和 pull 兩個 方法下取得平衡,也就是不僅縮短使用者等待時間,同時也不佔用太多網路資源。

並列摘要


In Next Generation Network (NGN), IP Multimedia Subsystem (IMS) plays an important role to offer IP-based multimedia services. Based on Chunghwa Telecom’s NGN/IMS, we develop linear-type data transmission applications such as bulletin board system (BBS) or forum-based websites to deliver new articles to the mobile users. We propose the push-N method that pushes every N articles from the BBS server to the user. When the user actually connects to the BBS, the not-yet-pushed messages are pulled by the user. Our study indicates that by selecting appropriate N values, push-N can provide balance to the push and the pull operations, and therefore improves the user access experience without wasting too much network resources consumption.

參考文獻


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