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On the relay selection for cooperative wireless networks with physical-layer network coding

机译：具有物理层网络编码的协作无线网络的中继选择

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摘要

In this paper, we investigate a large cooperative wireless network with relay nodes, in which cooperation is enabled through physical-layer network coding (PLNC). Specifically, we study the impact of the relay selection on the network capacity with power constraints in two scenarios. First, we consider the basic PLNC model (a.k.a., the ARB model), in which one pair of source nodes (A, B) exchange messages via a selected relay node (R). Given the power constraint, we derive the optimal relay selection and power allocation that maximize the sum capacity, defined as the summation of the capacity for two source-destination channels. Based on results obtained above, we then consider a more general scenario with multiple pairs of source nodes. Assuming the constant power constraint, we derive the upper bound of the minimal sum capacity of any source pair. The optimal power allocation among multiple source pairs is also derived. To validate these theoretical results, we also provide two relay selection strategies: a modified optimal relay assignment strategy and a novel middle point strategy for maximizing the minimal sum capacity of any source pair.
机译：在本文中，我们研究了一个具有中继节点的大型协作无线网络，其中通过物理层网络编码（PLNC）启用了协作。具体来说，我们在两种情况下研究了继电器选择对具有功率限制的网络容量的影响。首先，我们考虑基本的PLNC模型（也称为ARB模型），其中一对源节点（A，B）通过选定的中继节点（R）交换消息。给定功率约束，我们得出了使总容量最大化的最佳继电器选择和功率分配，总容量定义为两个源-目标信道的容量之和。根据上面获得的结果，我们然后考虑具有多对源节点的更一般的方案。假设恒定功率约束，我们得出任何源对的最小总和容量的上限。还导出了多个源对之间的最佳功率分配。为了验证这些理论结果，我们还提供了两种中继选择策略：修改后的最佳中继分配策略和新颖的中点策略，用于最大化任何源对的最小总容量。

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  • 来源
    《Wireless Networks》 |2012年第6期|p.653-665|共13页
  • 作者

    Zeyu Zheng; Shengli Fu; Kejie Lu; Jianping Wang; Biao Chen;

  • 作者单位

    Department of Computer Science, City University of Hong Kong, Hong Kong, People's Republic of China;

    Department of Electrical Engineering, University of North Texas, Denton, TX 76207, USA;

    Department of Electrical and Computer Engineering, University of Puerto Rico at Mayaguez, Mayaguez, PR 00681, USA;

    Department of Computer Science, City University of Hong Kong, Hong Kong, People's Republic of China;

    Faculty of Science and Technology, University of Macau, Macau, People's Republic of China;

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  • 正文语种 eng
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  • 关键词

    physical-layer network coding; the ARB model; relay selection; power constraints; sum capacil;

    机译：物理层网络编码;ARB模型;继电器选择;功率限制;总容量;

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