Partner Choice and Power Allocation for Energy Efficient Cooperation in Wireless Sensor Networks
Partner Choice and Power Allocation for Energy Efficient Cooperation in Wireless Sensor Networks
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DOI：
10.1109/icc.2008.799
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发表时间：
2008-05
期刊：
影响因子：
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通讯作者：
L. Simić;S. Berber;K. Sowerby
中科院分区：
文献类型：
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作者：
L. Simić;S. Berber;K. Sowerby
节能通信是能量受限的无线传感器网络的关键要求。协作分集可以应用于无线传感器网络，以显着降低节点能耗。然而，明智地选择和协调合作伙伴对于挖掘这种节能合作潜力至关重要。在本文中，我们研究了无线传感器网络中节能合作的最佳合作伙伴选择和功率分配。我们的见解引导我们制定功率分配和合作伙伴选择启发法，为能量受限的无线传感器网络形成简单实用的合作策略，使节点能够自主做出接近最优的合作决策。我们表明，功率分配优化问题是非线性的，需要使用搜索来找到最佳解决方案。我们展示了一系列潜在合作伙伴位置的网络几何结构方面所产生的合作节能效果。我们的结果表明，合作伙伴-目的地渠道和来源-合作伙伴渠道对最佳能源效率的合作决策具有大致相同的影响力。我们利用这一观察结果设计了一种简单但接近最优的功率分配启发式方法。
Energy efficient communication is a key requirement of energy-constrained wireless sensor networks. Cooperative diversity can be applied to wireless sensor networks to significantly reduce node energy consumption. However, judicious selection and coordination of cooperation partners is essential to exploiting this energy saving potential of cooperation. In this paper we investigate optimal partner choice and power allocation for energy efficient cooperation in wireless sensor networks. Our insights lead us to formulate power allocation and partner choice heuristics which form a simple and practical cooperation strategy for energy-constrained wireless sensor networks, allowing nodes to autonomously make near-optimal cooperation decisions. We show that the power allocation optimisation problem is non-linear, necessitating the use of a search to find the optimum solution. We present the resulting cooperative energy savings in terms of network geometry for a range of potential partner locations. Our results reveal that the partner-destination and the source-partner channels have roughly equal influence over cooperation decisions for optimal energy efficiency. We use this observation to devise a simple yet near-optimal power allocation heuristic.