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首页> 外文期刊>International journal of communication systems >Arbitration Interframe Space-controlled Medium Access Control:a medium access control protocol guaranteeing absolute priority in wireless local area networks
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Arbitration Interframe Space-controlled Medium Access Control:a medium access control protocol guaranteeing absolute priority in wireless local area networks

机译：仲裁帧间空间控制的媒体访问控制：一种媒体访问控制协议，可确保无线局域网中的绝对优先级

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摘要

The demand for multimedia services, such as voice over Internet Protocol, video on demand, information dissemination, and file sharing, is increasing explosively in wireless local area networks. These multimedia services require a certain level of QoS. Thus, it is important to provide QoS for multimedia applications. IEEE 802.lie tries to meet the QoS requirement of multimedia services by using Enhanced Distributed Channel Access. This gives more weights to high-priority traffic than low-priority traffic in accessing the wireless channel. However, Enhanced Distributed Channel Access suffers from many problems such as low aggregate throughput, high collision rates, and ineffective QoS differentiation among priority classes. In this paper, we propose a new medium access scheme, the Arbitration Interframe Space-controlled Medium Access Control (AC-MAC), that guarantees absolute priority in 802.11 wireless networks. In AC-MAC, the AIFS and contention window values are controlled, so that a higher-priority traffic can preferentially access and effectively utilize the channel. Extensive simulations show that AC-MAC can perfectly provide absolute priority and good throughput performance regardless of the number of contending nodes. In the simulation of voice over Internet Protocol service, AC-MAC provides effective QoS differentiation among services and also meets the high level of QoS requirements. AC-MAC also adapts quickly in a dynamic environment and provides good fairness among the nodes belonging to the same priority class.
机译：在无线局域网中，对诸如互联网协议语音，视频点播，信息分发和文件共享之类的多媒体服务的需求正在爆炸性增长。这些多媒体服务需要一定级别的QoS。因此，重要的是为多媒体应用提供QoS。 IEEE 802.lie尝试通过使用增强型分布式信道访问来满足多媒体服务的QoS要求。在访问无线信道时，与低优先级流量相比，这赋予了高优先级流量更多的权重。但是，增强型分布式信道访问存在许多问题，例如聚合吞吐量低，冲突率高以及优先级之间的QoS区分无效。在本文中，我们提出了一种新的媒体访问方案，即仲裁帧间空间控制的媒体访问控制（AC-MAC），它可以保证802.11无线网络中的绝对优先级。在AC-MAC中，控制AIFS和竞争窗口值，以便优先级较高的流量可以优先访问并有效利用信道。大量的仿真表明，无论竞争节点的数量如何，AC-MAC都能完美地提供绝对优先级和良好的吞吐量性能。在模拟Internet协议语音服务时，AC-MAC提供了服务之间有效的QoS区分，并且还满足了较高的QoS要求。 AC-MAC还可以在动态环境中快速适应，并在属于同一优先级类别的节点之间提供良好的公平性。

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