Cross-layer distributed joint power control and scheduling for delay-constrained applications over CDMA-based wireless ad-hoc networks
Cross-layer distributed joint power control and scheduling for delay-constrained applications over CDMA-based wireless ad-hoc networks
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DOI：
10.1109/tcomm.2010.02.060069
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发表时间：
2010-02
影响因子：
8.3
通讯作者：
Q. Qu;L. Milstein;D. Vaman
中科院分区：
文献类型：
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作者：
Q. Qu;L. Milstein;D. Vaman
在本文中，我们针对基于移动码分多址（CDMA）的自组织无线网络中受延迟约束的应用，提出了一种跨层分布式功率控制与调度协议。在此，我们提出一种新的方案，即通过跨层信息交换利用功率控制来应对多跳无线自组织网络中出现的延迟。基于此，提出了一种分布式功率控制与调度协议，以控制产生的延迟以及多址干扰（MAI）。与先前其他关于功率控制和调度的工作不同，我们还研究了多普勒扩展对系统性能的影响，并提供了一个鲁棒的系统，当多普勒扩展较大时，该系统通过结合功率控制以及编码/交织，利用时间分集来对抗多普勒扩展的影响。因此，我们所提出的方法能够在广泛的信道条件下正常运行。
In this paper, we propose a cross-layer distributed power control and scheduling protocol for delay-constrained applications over mobile CDMA-based ad hoc wireless networks. Herein, we propose a novel scheme where power control is employed to combat delay occurring on multi-hop wireless ad hoc networks via cross-layer information exchange. Based on that, a distributed power control and scheduling protocol is proposed to control the incurred delay as well as the multiple access interference (MAI). Unlike other previous work on power control and scheduling, we also investigate the impact of Doppler spread upon the system performance, and provide a robust system which employs a combination of power control, and coding/interleaving to combat the effects of Doppler spread by exploiting the time diversity when the Doppler spread gets large. Hence, our proposed approach can function appropriately over a wide range of channel conditions.