In order to provide information privacy for the primary network and support the secondary quality-of-service (QoS) requirement, we design a cooperative primary preserving strategy which simultaneously transfers information and power in cognitive radio networks. In this strategy, the secondary network provides information security for the primary information transmission in three phases and obtains some licensed spectrum for the secondary information transmission. Specifically, in the first phase, a fraction of the primary transmitter’s power is allocated for the primary privacy transmission, and the remaining power is utilized to beamform the energy signal for energy harvesting. After receiving the privacy signal, two secondary users cooperatively forward the privacy information under jamming protection. In the last phase, the secondary user occupies the licensed spectrum for the secondary information transmission. We first analyze the transmission reliability and secrecy performances of the primary network, and then the primary transmit power and the time slot are optimally allocated such that the secondary transmission rate is maximized under the requirements of the primary information reliability and security. Additionally, we also investigate the primary power and time slot allocation problem for the asymptotic scenario. Numerical results are presented to show the performance improvement of the proposed scheme about the secondary average rate under the primary performance requirements.

中文翻译：

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用于认知无线电网络的联合无线电力和信息传输的主要隐私保护

为了为主要网络提供信息隐私并支持次要服务质量（QoS）要求，我们设计了一种协作主要保留策略，在认知无线电网络中同时传输信息和功率。在该策略中，二级网络分三个阶段为一级信息传输提供信息安全，并为二级信息传输获取一定的许可频谱。具体来说，在第一阶段，主发射机功率的一部分被分配用于主隐私传输，剩余的功率用于对能量信号进行波束成形以进行能量收集。两个次级用户收到隐私信号后，在干扰保护下协同转发隐私信息。在最后阶段，次用户占用授权频谱进行次信息传输。我们首先分析一次网络的传输可靠性和保密性能，然后在一次信息可靠性和安全性的要求下优化分配一次发射功率和时隙，使二次传输速率最大化。此外，我们还研究了渐近场景的主要功率和时隙分配问题。数值结果显示了所提出的方案在初级性能要求下关于次级平均速率的性能改进。然后优化分配一次发射功率和时隙，使得二次传输速率在一次信息可靠性和安全性的要求下最大化。此外，我们还研究了渐近场景的主要功率和时隙分配问题。数值结果显示了所提出的方案在初级性能要求下关于次级平均速率的性能改进。然后优化分配一次发射功率和时隙，使得二次传输速率在一次信息可靠性和安全性的要求下最大化。此外，我们还研究了渐近场景的主要功率和时隙分配问题。数值结果显示了所提出的方案在初级性能要求下关于次级平均速率的性能改进。