In this paper, we propose a novel system state aware multichannel protocol for energy harvesting cognitive radio networks (EH-CRNs). In contrast with the state-of-the-art approaches, the proposed scheme jointly accounts for the primary users traffic characteristics as well as the instantaneous channel state over a particular channel. Our analysis demonstrates that the channel state is a critical parameter for both transmission and harvesting. The proposed protocol, depending on the states of multiple channels and its data transmission versus energy harvesting priority, intelligently decides whether to enter transmission mode over a channel or harvesting mode over a potentially different channel, and the corresponding time duration. Further, exploiting the temporal correlation present in channel and also the PU traffic characteristics, the proposed protocol computes the inter-sensing interval instead of sensing the channel in every time slot, thereby enhancing the energy efficiency. Our numerical results, verified through extensive event-driven simulations, demonstrate that the proposed scheme offers an energy efficiency gain as high as 1.36 times over its nearest competitive approach.

中文翻译：

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用于能量收集 CRN 的系统状态感知切换多通道协议

在本文中，我们提出了一种用于能量收集认知无线电网络 (EH-CRN) 的新型系统状态感知多通道协议。与最先进的方法相比，所提出的方案联合考虑了主要用户的流量特征以及特定信道上的瞬时信道状态。我们的分析表明，通道状态是传输和收集的关键参数。所提出的协议根据多个通道的状态及其数据传输与能量收集优先级，智能地决定是通过一个通道进入传输模式还是在可能不同的通道上进入收集模式，以及相应的持续时间。此外，利用信道中存在的时间相关性以及 PU 流量特性，提议的协议计算互感间隔而不是在每个时隙中感测信道，从而提高能量效率。我们的数值结果通过广泛的事件驱动模拟验证，表明所提出的方案提供的能源效率增益是其最接近的竞争方法的 1.36 倍。