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首页> 外文期刊>Universal Journal of Communications and Network >Performance Analysis of Priority Schemes for IEEE 802.11e Wireless Local Area Networks Using Multiple Flows Distributed Weighted Fair Queuing Algorithm
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Performance Analysis of Priority Schemes for IEEE 802.11e Wireless Local Area Networks Using Multiple Flows Distributed Weighted Fair Queuing Algorithm

机译：IEEE 802.11e无线局域网优先方案使用多流分布式加权公平排队算法的性能分析

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In this paper, a novel and simple search algorithm called distributed weighted fair queuing (DWFQ) algorithm is proposed for the quality-of-service (QoS) in IEEE 802.11e wireless local area networks (WLANs). We first propose that the IEEE 802.11e enhanced distributed coordination function (EDCF) is an efficient algorithm to support the QoS in WLANs, although it can provide more bandwidth to packets with higher priority. However, when the system under heavy traffic load situation, IEEE 802.11e EDCF can’t guarantee the fair allocation of excess bandwidth of each access categories (ACs), i.e., under heavy traffic load, EDCF guarantees the QoS of packets with higher priority by reducing the QoS of packets with lower priority. This paper discuses an EDCF scheme, in order to distribute bandwidth fairly among different ACs under heavy traffic load situation in WLAN, we propose multiple flows DWFQ algorithm. This algorithm not only supports the concept of differentiating ACs with different priorities but also guarantees the fair allocation of each ACs according to their relative weights. Furthermore, in this propose a mechanism to resolve the overload situation problem and doubling contention window (CW) method to reduce the collision probability. The simulations performed show that multiple flows DWFQ with doubling CW method which can perform an attractive performance even under heavy traffic load.
机译：本文针对IEEE 802.11e无线局域网（WLAN）的服务质量（QoS）提出了一种新颖，简单的搜索算法，称为分布式加权公平排队（DWFQ）算法。我们首先提出，IEEE 802.11e增强型分布式协调功能（EDCF）是一种有效的算法，可支持WLAN中的QoS，尽管它可以为优先级更高的数据包提供更多带宽。但是，当系统在通信量大的情况下，IEEE 802.11e EDCF不能保证公平分配每个访问类别（AC）的多余带宽，即在通信量大的情况下，EDCF可以通过以下方式保证具有更高优先级的数据包的QoS：降低优先级较低的数据包的QoS。本文讨论了一种EDCF方案，为了在WLAN流量繁忙的情况下在不同AC之间公平地分配带宽，我们提出了多流DWFQ算法。该算法不仅支持区分优先级不同的AC的概念，而且可以保证根据其相对权重公平分配每个AC。此外，在此提出了一种解决过载情况问题的机制，并提出了一种通过增加竞争窗口（CW）方法来降低冲突概率的机制。进行的仿真表明，采用双倍CW方法的多流DWFQ即使在繁重的流量负载下也可以表现出出色的性能。

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