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Opportunistic and Cooperative Spatial Multiplexing in MIMO Ad Hoc Networks

机译:MIMO Ad Hoc网络中的机会合作空间复用

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摘要

With the fast progress of multiple-input–multiple-output (MIMO) technology and its growing applications in networks, it is important to develop techniques to enable more efficient MIMO network communications. However, it is very challenging to coordinate node transmissions in a MIMO-based ad hoc network. In this work, we propose schemes that take advantage of the meshed topology of ad hoc networks to fully exploit the multiuser diversity and spatial diversity in order to maximize the data rate of the network while supporting different transmission priorities, reducing transmission delay, and ensuring fair transmissions among nodes. We formulate a concrete physical model and present cross-layer centralized and distributed scheduling algorithms that exploit physical-layer channel information to opportunistically schedule cooperative spatial multiplexed transmissions between nodes. We also propose a new MAC scheme to support our distributed algorithm. The performance of our algorithms are studied through extensive simulations, and the results demonstrate that our algorithms are very effective and can significantly increase the network throughput while reducing the transmission delay.
机译:随着多输入多输出(MIMO)技术的快速发展及其在网络中的日益增长的应用,开发能够实现更高效的MIMO网络通信的技术非常重要。然而,在基于MIMO的自组织网络中协调节点传输是非常具有挑战性的。在这项工作中,我们提出了利用ad hoc网络的网格拓扑来充分利用多用户分集和空间分集的方案,以便在支持不同的传输优先级,减少传输延迟并确保公平的同时最大化网络的数据速率。节点之间的传输。我们制定了一个具体的物理模型,并提出了跨层集中式和分布式调度算法,这些算法利用物理层的信道信息来机会性地调度节点之间的协作空间复用传输。我们还提出了一种新的MAC方案来支持我们的分布式算法。通过广泛的仿真研究了我们算法的性能,结果表明我们的算法非常有效,可以显着提高网络吞吐量,同时减少传输延迟。

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