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首页> 外文会议>International Conference on Information Technology - New Generations >Airborne Networks with Multi-beam Smart Antennas: Towards a QOS-Supported, Mobility-Predictive MAC
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Airborne Networks with Multi-beam Smart Antennas: Towards a QOS-Supported, Mobility-Predictive MAC

机译：空中网络具有多束智能天线：朝向QoS支持的移动性预测MAC

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Airborne networks require throughput-efficient MAC for mission-oriented communications. The use of multi-beam smart antennas (MBSAs) could provide the network with better throughput performance since all beams can send out data concurrently. In this paper, we propose a two-layer MAC design for MBSA-based airborne network. In the upper layer, we use TDMA-like schedule control to separate the packet collision domains in multi-beam data transmissions. In the lower layer, we use the CSMA/CA based scheme that is compatible with conventional 802.11 protocols. Such a two-layer scheme significantly reduces the packet contentions and thus improves the throughput. In addition, in order to support mission priorities in the network, we introduce the QoS-oriented MAC control in both upper and lower layers. Furthermore, a mesh network time synchronization method is proposed to guarantee the beam synchronization. A Hierarchical Dirichlet Process (HDP) enhanced Hidden Markov Model (HMM) is used for mobility prediction in each beam (direction) of a node. These approaches could better exploit the benefits of MBSAs. The simulation results show that our proposed MAC protocol outperforms the standard 802.11 DCF and general MBSA-based MAC designs. The validation of the QoS control, synchronization and prediction schemes are also evaluated. It turns out that these schemes could greatly improve the overall performance of the airborne networks.
机译：空中网络需要吞吐量高效的MAC以进行任务导向的通信。使用多光束智能天线（MBSA）可以提供具有更好吞吐量性能的网络，因为所有光束都可以同时发送数据。在本文中，我们为基于MBSA的空机网络提出了双层MAC设计。在上层中，我们使用TDMA的调度控制来分离多光束数据传输中的分组碰撞域。在下层中，我们使用与传统的802.11协议兼容的CSMA / CA方案。这种双层方案显着降低了分组符号，从而提高了吞吐量。此外，为了支持网络中的任务优先级，我们在上层和下层中引入了QoS导向的MAC控制。此外，提出了一种网状网络时间同步方法以保证光束同步。分层DireChlet过程（HDP）增强的隐藏马尔可夫模型（HMM）用于节点的每个波束（方向）中的移动预测。这些方法可以更好地利用MBSA的益处。仿真结果表明，我们所提出的MAC协议优于标准的802.11 DCF和基于MBSA的MAC设计。还评估了QoS控制，同步和预测方案的验证。事实证明，这些方案可以大大提高空中网络的整体性能。

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