Performance analysis for IEEE 802.11e EDCF service differentiation
Performance analysis for IEEE 802.11e EDCF service differentiation
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DOI：
10.1109/twc.2005.847113
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发表时间：
2005-07
影响因子：
10.4
通讯作者：
Hua Zhu;I. Chlamtac
中科院分区：
文献类型：
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作者：
Hua Zhu;I. Chlamtac
IEEE 802.11最初是作为有线局域网的扩展而开发的，它缺乏对服务质量（QoS）和差分服务的支持。自其推出以来，各种扩展和修改已被研究，以解决这一当前的需要和IEEE 802.11任务组E负责开发QoS感知MAC协议，考虑几个服务区分机制。然而，服务区分的性能仅通过模拟来评估。竞争参数配置所对应的差异服务性能的分析模型还没有找到。在本文中，我们首先简要介绍了增强分布式协调功能（EDCF）的IEEE 802.11 e接入方法。然后，我们介绍了一个分析模型，它可以用来计算流量的优先级，吞吐量和延迟对应的配置的多个DCF竞争参数下的饱和条件。详细的仿真结果验证了所提出的模型。最后，使用分析模型，我们分析了每个竞争参数对服务区分的影响。竞争参数可以在每个站处适当地配置，以实现应用的服务区分的特定需求。
Having been originally developed as an extension of the wired local area networks, IEEE 802.11 lacks support for quality-of-service (QoS) and differential services. Since its introduction, various extensions and modifications have been studied to address this current need and the IEEE 802.11 Task Group E is responsible for developing a QoS-aware MAC protocol that considers several service differentiation mechanisms. However, the performance of service differentiation has only been evaluated by simulation. The analytical model that calculates the differential service performance corresponding to the contention parameter configuration has not been found yet. In this paper, we first briefly explain the enhanced distributed coordination function (EDCF) access method of IEEE 802.11e. We then introduce an analytical model, which can be used to calculate the traffic priority, throughput, and delay corresponding to the configuration of multiple DCF contention parameters under the saturation condition. A detailed simulation is provided to validate the proposed model. Finally, using the analytical model, we analyze the effect on service differentiation for each contention parameter. The contention parameters can be configured appropriately at each station to achieve specific needs of service differentiation for applications.