IEEE 802.11 e竞争基础设施基本服务集的多媒体容量分析
Multimedia Capacity Analysis of the IEEE 802.11e Contention-based Infrastructure Basic Service Set
摘要：
我们首先提出了一个简单的数学分析框架，最近批准的IEEE 802.11e标准的增强分布式信道接入（EDCA）功能。我们的分析认为，分布式随机接入系统表现出循环行为的事实。所提出的模型是有效的AC特定的仲裁帧间空间（AIFS）的值和竞争窗口（CW）的大小的任意分配，是第一个考虑任意分布的主动访问类别（AC）在车站。通过大量的模拟验证理论结果，我们表明，所提出的分析准确地捕捉EDCA饱和性能。接下来，我们提出了一个多媒体容量分析的EDCA功能的框架。我们计算一个准确的车站和AC特定的队列利用率适当加权的周期时间模型的服务时间预测不同数量的活跃站。基于计算出的队列利用率，我们设计了一个简单的基于模型的接纳控制方案。我们表明，所提出的呼叫准入控制算法保持满意的用户感知的质量共存的语音和视频连接在基础设施BSS，并不存在过或不足的准入问题，以前提出的模型在文献中。
英文摘要：
We first propose a simple mathematical analysis framework for the Enhanced Distributed Channel Access (EDCA) function of the recently ratified IEEE 802.11e standard. Our analysis considers the fact that the distributed random access systems exhibit cyclic behavior. The proposed model is valid for arbitrary assignments of AC-specific Arbitration Interframe Space (AIFS) values and Contention Window (CW) sizes and is the first that considers an arbitrary distribution of active Access Categories (ACs) at the stations. Validating the theoretical results via extensive simulations, we show that the proposed analysis accurately captures the EDCA saturation performance. Next, we propose a framework for multimedia capacity analysis of the EDCA function. We calculate an accurate station- and AC-specific queue utilization ratio by appropriately weighing the service time predictions of the cycle time model for different number of active stations. Based on the calculated queue utilization ratio, we design a simple model-based admission control scheme. We show that the proposed call admission control algorithm maintains satisfactory user-perceived quality for coexisting voice and video connections in an infrastructure BSS and does not present over- or under-admission problems of previously proposed models in the literature.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
