In this paper, the model of cooperative cognitive radio network is used to explore the two-way communications between a pair of unlicensed users by sharing the spectrum of any existing pair of licensed users. The licensed users of the spectrum are considered as primary users (PUs) and the unlicensed users of the spectrum are considered as secondary users (SUs). SUs are able to access the PUs spectrum by serving the relaying action between PU-to-PU communications. SUs are enabled by harvesting the energy from radio frequency signal following the principle of power splitting (PS) scheme of simultaneous wireless information and power transfer protocol. The closed form outage expressions of both PU and SU systems are derived. Analytical results validated through the simulations results. The results are also compared with existing work on two-way SU communications in presence of two-way PU communications. Based on the comparison, it is found that about \({\sim 191\%}\) and \({\sim 656\%}\) performance gains are possible to achieve by using proposed PS protocol in terms of spectrum efficiency and energy efficiency, respectively as compared to similar system using time switching protocol.

在本文中，通过共享任何现有的一对许可用户的频谱，使用合作认知无线电网络模型来探索一对非许可用户之间的双向通信。频谱的许可用户被视为主要用户（PU），频谱的非许可用户被视为次要用户（SU）。SU能够通过服务PU到PU通信之间的中继动作来访问PU频谱。遵循同步无线信息和功率传输协议的功率分配（PS）方案的原理，通过从射频信号中收集能量来启用SU。推导了PU和SU系统的封闭式停运表达式。通过模拟结果验证了分析结果。还将结果与存在双向PU通信的关于双向SU通信的现有工作进行比较。根据比较，发现关于与使用类似系统的类似系统相比，通过使用建议的PS协议在频谱效率和能效方面分别可以实现\（{\ sim 191 \％} \）和\（{\ sim 656 \％} \）性能提升时间切换协议。