隨著無線通訊傳輸技術日新月異，WiMAX(全球互通微波存取)的出現，讓影音傳輸得以無線化，也拉近人與人之間的距離。本篇論文將發展一套在IEEE 802.16e上，多條多媒體資料流傳輸時的頻寬分配機制與允許進入控制機制。為了更有效率的使用頻寬資源，及減少實做成本（例如，緩衝記憶體的需要），我們首先使用一個針對MPEG 4即時可變位元率（Real-time VBR）資料的線性預測器。我們基於預測器的結果作下一個時間的頻寬分配。另外，我們建立在IEEE 802.16e上單一網路的MPEG 4頻寬分佈數學模型，並建立基於此數學模型的以量測為基礎的允許進入控制（MBAC）機制，可以同時考慮連接層次與封包層次的服務品質。本論文基於Dynamic Guard Channel (DGC)方法做到可動態調整門檻值，並且能在動態的調整門檻值的過程中加入適當的調整限制以提升服務品質。模擬顯示我們的允許進入控制機制能服務品質保證的情況下達到相當高的網路利用率。

Because of the present of the WiMax (Worldwide Interoperability for Microwave Access)technology, the wide range, wireless multimedia transmission becomes possible. This paper develop a bandwidth allocation and admission control mechanism of multimedia transmission. In order to utilize the bandwidth more efficiency and reduce the implementation costs, we use a linear traffic predictor for real-time MPEG4 traffic. Also, we develop a mathematical model of distribution of MPEG4 bandwidth allocation. We can take this result in measurement-based admission control scheme. This scheme can take account of QoS of connection level and packet level in the same time. This paper can adjust the threshold adaptively based on dynamic guard band mechanism and appropriate constraints. Simulation results show that our admission control mechanism can achieve high network utilization.

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