無線非同步模式網路中一個有效率並保證服務品質的多重存取協定

Abstract

無線通訊中，無線頻寬是有限的瓶頸資源。在本文，我們提出一個新的 媒體存取控制協定，此協定叫做先進動態時槽指定(A-DSA)。這方法符合 多項無線非同步模式網路所需要的 效能需求，如: 高效率、低延遲、與 非同步模式網路相容並具服務品質保證、省電、抗隱藏式手機、非對稱交 通、移動管理等。在我們的研究中, 我們觀察到要求稀少現象，也就是要 求的平均交通量遠小於資訊細胞的平均交通量。基於對要求交通的量化分 析，我們提出計算叢簇規則，來將要求頻道動態調整，使延遲得以減少。 此外，我們採用交通狀態轉換的概念，來描述任意位元速率與可變位元速 率服務中的動態交通特性。藉此觀念，我們提出一個智慧型的細胞排序法 則，此法則善用語音服務的垂直保留與資料服務的水平保留特質，來達到 服務品質的保證。 Radio bandwidth is the bottleneck resource in wireless communications. In this paper, we propose a MAC protocol called Advanced Dynamic Slot Assignment (A-DSA) that allocates the radio resource to match the wireless ATM performance criteria such as high efficiency, short delay, ATM compatible with Quality-of-Service (QoS) guarantee, power saving, anti- hidden terminals, asymmetrical traffic, mobility management, and so on. In our research, we observe the Request Paltry Phenomenon that the average traffic of re quests is much less than that of information cells. Based on the quantification of the request traffic, we propose a calculative cluster rule to dynamically arrange the uplink request channels so that the access delay of cells can be reduced. Furthermore, we adopt the concept of traffic state transition to describe the dynamic traffic characteristics in available bit rate (ABR) and variable bit rate(VBR) services. With the traffic state transition, we propose an intelligent cell scheduling algorithm with the vertical reservation property for voice services and the horizontal reservation property for data services to Guarantee QoS.