Zhang Jinhuan, Long Jun
School of Information Science and Engineering, Central South University, Changsha 410083, China.
Sensors (Basel). 2017 Jun 12;17(6):1366. doi: 10.3390/s17061366.
Wireless sensor networks (WSNs) are one of the important supporting technologies of edge computing. In WSNs, reliable communications are essential for most applications due to the unreliability of wireless links. In addition, network lifetime is also an important performance metric and needs to be considered in many WSN studies. In the paper, an energy-aware hybrid Automatic Repeat-reQuest protocol (ARQ) scheme is proposed to ensure energy efficiency under the guarantee of network transmission reliability. In the scheme, the source node sends data packets continuously with the correct window size and it does not need to wait for the acknowledgement (ACK) confirmation for each data packet. When the destination receives data packets, it will return multiple copies of one ACK for confirmation to avoid ACK packet loss. The energy consumption of each node in flat circle network applying the proposed scheme is statistical analyzed and the cases under which it is more energy efficiency than the original scheme is discussed. Moreover, how to select parameters of the scheme is addressed to extend the network lifetime under the constraint of the network reliability. In addition, the energy efficiency of the proposed schemes is evaluated. Simulation results are presented to demonstrate that a node energy consumption reduction could be gained and the network lifetime is prolonged.
无线传感器网络（WSNs）是边缘计算的重要支撑技术之一。在无线传感器网络中，由于无线链路的不可靠性，可靠通信对于大多数应用至关重要。此外，网络寿命也是一个重要的性能指标，在许多无线传感器网络研究中都需要考虑。本文提出了一种能量感知混合自动重传请求协议（ARQ）方案，以在保证网络传输可靠性的前提下确保能量效率。在该方案中，源节点以正确的窗口大小连续发送数据包，无需等待每个数据包的确认（ACK）。当目的节点接收到数据包时，它将返回一个ACK的多个副本进行确认，以避免ACK数据包丢失。对应用该方案的平面圆形网络中每个节点的能耗进行了统计分析，并讨论了该方案比原方案更节能的情况。此外，还讨论了如何选择该方案的参数，以在网络可靠性的约束下延长网络寿命。此外，还对所提方案的能量效率进行了评估。仿真结果表明，该方案可以降低节点能耗，延长网络寿命。
