Massive MIMO Cognitive Cooperative Relaying
Massive MIMO Cognitive Cooperative Relaying
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DOI：
10.1007/978-3-030-23597-0_8
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发表时间：
2019-06
期刊：
影响因子：
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通讯作者：
Son Dinh;Hang Liu;Ouyang Feng
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文献类型：
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作者：
Son Dinh;Hang Liu;Ouyang Feng
提出了一种基于大规模多输入多输出（MMIMO）和非正交多址（NOMA）无线技术的认知协作传输方案，实现了一个宏小区网络和多个认知小小区在动态频谱共享中的协作。假设宏小区网络拥有频谱带并且是主网络（PN），并且小小区充当辅网络（SN）。小小区的辅助接入点（SAP）可以协作地中继宏小区网络中的主用户（PU）的业务，同时并发地接入PU的频谱以通过MMIMO和NOMA机会性地发送它们自己的数据。这样的合作创造了一个“双赢”的局面：在SAP中继的帮助下，PU的吞吐量将显著增加，SAP能够使用PU的频谱来服务于他们的次级用户（SU）。这些先进的无线电技术的相互作用进行了分析，在一个系统的方式，并提出了一个框架，合作中继选择，NOMA和MMIMO发射功率分配，传输调度的联合优化。此外，为了模拟网络范围内的合作和竞争，双边匹配算法的设计，以找到多个SAP和PU之间的稳定的伙伴关系。评估结果表明，该方案实现了显着的性能增益为主要和次要用户相比，基线。
This paper proposes a novel cognitive cooperative transmission scheme by exploiting massive multiple-input multiple-output (MMIMO) and non-orthogonal multiple access (NOMA) radio technologies, which enables a macrocell network and multiple cognitive small cells to cooperate in dynamic spectrum sharing. The macrocell network is assumed to own the spectrum band and be the primary network (PN), and the small cells act as the secondary networks (SNs). The secondary access points (SAPs) of the small cells can cooperatively relay the traffic for the primary users (PUs) in the macrocell network, while concurrently accessing the PUs’ spectrum to transmit their own data opportunistically through MMIMO and NOMA. Such cooperation creates a “win-win” situation: the throughput of PUs will be significantly increased with the help of SAP relays, and the SAPs are able to use the PU’s spectrum to serve their secondary users (SUs). The interplay of these advanced radio techniques is analyzed in a systematic manner, and a framework is proposed for the joint optimization of cooperative relay selection, NOMA and MMIMO transmit power allocation, and transmission scheduling. Further, to model network-wide cooperation and competition, a two-sided matching algorithm is designed to find the stable partnership between multiple SAPs and PUs. The evaluation results demonstrate that the proposed scheme achieves significant performance gains for both primary and secondary users, compared to the baselines.