多媒體簡訊伺服器上以臨界值為基礎的允入控制

Threshold-Based Admission Control for an MMS Server

王志暐(Zhi-Wei Wang)

指導教授 ： 黃毅然

元智大學/資訊學院/資訊工程學系/碩士(2004年)

摘要

多媒體簡訊服務承諾使簡訊的容量大幅度的增加，這不僅豐富了使用者使用簡訊服務的體驗，更為網路、資訊及服務提供業者創造另一個主要的獲利來源。然而，多媒體簡訊服務雖然提升了此領域的進展，大量的資料交換也刺激了更多resource-intensive應用產品的需求以及影響了頻寬的分配方式以確保資料的傳輸。除此之外，取決於多媒體簡訊內容的位置及大小，使用者對於傳輸延遲的感知也提升了。在本篇論文中，我們對多媒體簡訊伺服器提出了一個服務品質的控管策略，叫做"以臨界值為基礎的允入控制"。其中，我們將進入伺服器的簡訊分為兩類，分別是高優先權的多媒體簡訊及低優先權的多媒體簡訊。此外，本篇論文發展了一套分析模組來探討此策略的效能，並將多媒體簡訊的轉送和終結失效等因素納入討論。基於此模組的分析，我們可以利用數值分析來決定一個最理想的臨界值，使得頻寬能有效的被利用且滿足此兩類多媒體簡訊的服務品質需求。

關鍵字

多媒體簡訊服務 ； 服務品質 ； 以臨界值為基礎的允入控制

並列摘要

Multimedia messaging service (MMS) promises a dramatic increase in messaging capabilities that will enrich user experience and a major new source of revenue for network operators as well as content and service providers. However, despite the advances in this area, the ability to exchange large amounts of information further fuels the demand for more resource-intensive applications and affects the bandwidth allocated for ensuing transactions. In addition, delays perceived by users can increase depending on the size and location of the multimedia content. In this paper, we propose a QoS control strategy, called Threshold-Based Admission Control (TBAC), for an MMS server supporting two types of MMs: high- and low-priority. Taking the forwarding and the expiration effects of queued MMs into account, this paper develops an analytical model to study the TBAC performance. On the basis of the analysis, the optimal threshold for the TBAC strategy is numerically determined so that the bandwidth is efficiently utilized and the QoS requirements for both classes of MMs are satisfied.

並列關鍵字

Multimedia Messaging Service (MMS) ； Quality of Service (QoS) ； Threshold-Based Admission Control (TBAC)

參考文獻

[3] 3GPP TS 23.140, “Multimedia messaging service (MMS);

2004.

[4] 3GPP TS 23.060, “General packet radio service (GPRS);

[5] C. Aurrecoechea, A. Campbell, and L. Hauw, “A survey of

QoS architectures,” ACM/Springer-Verlag Multimedia