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首页> 外文期刊>IEEE transactions on mobile computing >Bandwidth Sharing Schemes for Multimedia Traffic in the IEEE 802.11e Contention-Based WLANs
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Bandwidth Sharing Schemes for Multimedia Traffic in the IEEE 802.11e Contention-Based WLANs

机译:基于IEEE 802.11e竞争的WLAN中多媒体流量的带宽共享方案

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摘要

Bandwidth allocation schemes have been well studied for mobile cellular networks. However, there is no study about this aspect reported for IEEE 802.11 contention-based distributed wireless LANs. In cellular networks, bandwidth is deterministic in terms of the number of channels by frequency division, time division, or code division. On the contrary, bandwidth allocation in contention-based distributed wireless LANs is extremely challenging due to its contention-based nature, packet-based network, and the most important aspect: only one channel is available, competed for by an unknown number of stations. As a consequence, guaranteeing bandwidth and allocating bandwidth are both challenging issues. In this paper, we address these difficult issues. We propose and study nine bandwidth allocation schemes, called sharing schemes, with guaranteed Quality of Service (QoS) for integrated voice/video/data traffic in IEEE 802.11e contention-based distributed wireless LANs. A guard period is proposed to prevent bandwidth allocation from overprovisioning and is for best-effort data traffic. Our study and analysis show that the guard period is a key concept for QoS guarantees in a contention-based channel. The proposed schemes are compared and evaluated via extensive simulations.
机译:对于移动蜂窝网络,带宽分配方案已经得到了很好的研究。但是,没有针对基于IEEE 802.11竞争的分布式无线LAN报告这一方面的研究。在蜂窝网络中,带宽是通过频分,时分或码分确定信道数量的。相反,基于争用的分布式无线局域网的带宽分配由于其基于争用的特性,基于分组的网络以及最重要的方面而极具挑战性:只有一个信道可用,由未知数目的站点竞争。结果,保证带宽和分配带宽都是具有挑战性的问题。在本文中,我们解决了这些难题。我们提出并研究了九种带宽分配方案,称为共享方案,可保证基于IEEE 802.11e竞争的分布式无线LAN中集成语音/视频/数据流量的服务质量(QoS)。提出了一个保护期,以防止带宽分配过大,并且是为了最大的努力而进行的数据通信。我们的研究和分析表明,保护期是基于竞争的信道中QoS保证的关键概念。通过广泛的仿真对提出的方案进行比较和评估。

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