Lee Sangku, Youn Janghyuk, Jung Bang Chul
Department of Electronics Engineering, Chungnaqm National University, Daejeon 34134, Korea.
Sensors (Basel). 2020 Mar 30;20(7):1942. doi: 10.3390/s20071942.
With the growth of the number of Internet of Things (IoT) devices, a wide range of wireless sensor networks (WSNs) will be deployed for various applications. In general, WSNs are constrained by limitations in spectrum and energy resources. In order to circumvent these technical challenges, we propose a novel cooperative phase-steering (CPS) technique with a simple on-off power control for generic spectrum sharing-based WSNs, which consists of a single secondary source (SS) node, multiple secondary relay (SR) nodes, a single secondary destination (SD) node, and multiple primary destination (PD) nodes. In the proposed technique, each SR node that succeeds in packet decoding from the SS and for which its interference power to the PD nodes is lower than a certain threshold is allowed to transmit the signal to the SD node. All SR nodes that are allowed to transmit signals to the SD node adjust the phase of their transmit signal such that the phase of received signals at the SD node from the SR nodes is aligned to a certain angle. Moreover, we mathematically analyze the outage probability of the proposed scheme. Our analytical and simulation results show that the proposed technique outperforms the conventional cooperative relaying schemes in terms of outage probability. Through extensive computer simulations, it is shown that the analytical results match well with the simulated outage probability as a lower bound.
随着物联网（IoT）设备数量的增长，将部署各种无线传感器网络（WSN）用于各种应用。一般来说，无线传感器网络受到频谱和能源资源限制的约束。为了克服这些技术挑战，我们提出了一种新颖的协作相位控制（CPS）技术，用于基于通用频谱共享的无线传感器网络，该技术采用简单的开关功率控制，由单个辅助源（SS）节点、多个辅助中继（SR）节点、单个辅助目的地（SD）节点和多个主要目的地（PD）节点组成。在所提出的技术中，每个成功从SS解码数据包且其对PD节点的干扰功率低于某个阈值的SR节点被允许将信号传输到SD节点。所有被允许向SD节点传输信号的SR节点调整其传输信号的相位，使得SD节点从SR节点接收到的信号的相位与某个角度对齐。此外，我们对所提出方案的中断概率进行了数学分析。我们的分析和仿真结果表明，所提出的技术在中断概率方面优于传统的协作中继方案。通过广泛的计算机仿真表明，分析结果与作为下限的模拟中断概率匹配良好。
