A Power Allocation Strategy for Multiple Poisson Spectrum-Sharing Networks
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摘要This paper develops a power allocation strategy for multiple networks of Poisson-distributed single-antenna nodes that share the available spectrum in a spectrum underlay scenario. This strategy aims to maximize the overall throughput obtained by sharing the spectrum while limiting the degradation of the successful transmission probability of each network. In its original form, this joint power allocation problem is difficult to solve. However, we demonstrate that the problem can be transformed into a convex optimization formulation, which can be efficiently solved. Furthermore, we obtain a quasi-closed-form solution that has a water-filling interpretation by analyzing the optimality conditions. Numerical results indicate that, when a spectrum-sharing scheme employs the proposed optimal strategy of power allocation, the throughput substantially improves over that obtained by exclusively allocating the spectrum to the primary network. Moreover, when the number of spectrum-sharing networks increases, the enhancement is significant, being up to the limit imposed by the maximum allowable degradation in the performance of each network.
著者Cai R, Zhang JK, Davidson TN, Zhang W, Wong KM, Ching PC
期刊名稱IEEE Transactions on Wireless Communications
出版年份2015
月份4
日期1
卷號14
期次4
出版社Institute of Electrical and Electronics Engineers (IEEE)
頁次1785 - 1799
國際標準期刊號1536-1276
電子國際標準期刊號1558-2248
語言英式英語
關鍵詞convex optimization; power allocation; spatial networks.; Spectrum sharing; stochastic geometry
Web of Science 學科類別Engineering; Engineering, Electrical & Electronic; Telecommunications

上次更新時間 2020-22-10 於 00:29