DSCA: Dynamic Spectrum Co-Access Between the Primary Users and the Secondary Users
DSCA: Dynamic Spectrum Co-Access Between the Primary Users and the Secondary Users
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DOI：
10.1109/tvt.2014.2322011
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发表时间：
2015-02
影响因子：
6.8
通讯作者：
Jonathan D. Backens;Chundheng Xin;Min Song;Changlong Chen
中科院分区：
文献类型：
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作者：
Jonathan D. Backens;Chundheng Xin;Min Song;Changlong Chen
在当前的动态频谱接入架构中，次用户（SU）仅机会性地接入主用户（PU）的频谱。PU的重新出现中断了二次通信，这可能导致SU的性能变差。在本文中，我们提出了一种新的架构，动态频谱接入，称为动态频谱共同访问（DSCA），使PU和SU同时访问授权频谱。利用DSCA，SU通过提高PU性能来透明地激励PU，使得SU可以与PU同时接入频谱;因此，不存在由于PU的复活而对辅助通信的中断。我们推导出一个数学模型来制定PU和SU之间的频谱共同访问的最小激励，并计算共同访问的区域，以确定可以与给定的PU共同访问的SU。还开发了一种算法来选择共同访问的主链路和辅链路，以最大限度地提高网络性能。仿真结果表明，与现有的动态频谱接入体系结构相比，DSCA显著提高了系统性能。
In the current architecture of dynamic spectrum access, secondary users (SUs) only opportunistically access the spectrum of primary users (PUs). The resurgence of PUs disrupts secondary communications, which can result in poor performance for SUs. In this paper, we propose a novel architecture for dynamic spectrum access, termed dynamic spectrum co-access (DSCA), to enable the PU and the SU to simultaneously access the licensed spectrum. With DSCA, SUs transparently incentivize PUs through increasing the PU performance so that SUs can access the spectrum simultaneously with PUs; hence, there is no disruption to secondary communications due to the resurgence of PUs. We derive a mathematical model to formulate the minimum incentives for the spectrum co-access between the PU and the SU and to compute the region of co-access to determine the SUs that can co-access with a given PU. An algorithm is also developed to select the co-access primary and secondary links to maximize network performance. Numerical results indicate that DSCA significantly improves performance compared with the current architecture of dynamic spectrum access.