“Multi-Modulation Scheme for RFID-based Sensor Networks"
“Multi-Modulation Scheme for RFID-based Sensor Networks"
复制标题
☀基于 RFID 的传感器网络的多调制方案"
DOI：
10.1007/978-3-030-67720-6_2
复制
发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Z.J. Haas
中科院分区：
文献类型：
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作者：
Z. Tian;Z.J. Haas
RFID技术在物联网中发挥着越来越重要的作用，特别是在密集部署模式中。在这样的网络中，除了通信之外，节点还可能需要从环境中收集能量以进行操作。特别是，我们假设我们的网络模型依赖于由无线识别和传感平台（WISP）设备和RFID激励器组成的RFID传感器网络。在WISP中，传感器从RFID激励器收集环境能量，并使用该能量与激励器进行通信。然而，由于激励器的数量通常很小，因此离激励器较远的传感器将需要较长的充电时间才能比离激励器较近的传感器传输相同量的信息。因此，更远的传感器限制了网络的总吞吐量。在本文中，我们建议使用一个多调制方案，它权衡功率传输持续时间。更具体地，在该方案中，对于所有传感器的传输的相同误码率，更靠近激励器的传感器使用高阶调制，其比分配给更远的传感器的低阶调制需要更多的功率。这减少了较近传感器的传输时间，同时也减少了较远传感器的充电时间，总体上增加了总网络吞吐量。评估结果表明，与传统的单调制方案相比，我们的多调制方案的RFID传感器网络具有显着更高的吞吐量。
RFID technology is playing an increasingly more important role in theInternet of Things, especially in the dense deployment model. In such networks, in addition to communication, nodes may also need to harvest energy from the environment to operate. In particular, we assume that our network model relies on RFID sensor network consisting of Wireless Identification and Sensing Platform (WISP) devices and RFID exciters. In WISP, the sensors harvest ambient energy from the RFID exciters and use this energy for communication back to the exciter. However, as the number of exciters is typically small, sensors further away from an exciter will need longer charging time to be able to transmit the same amount of information than a closer by sensor. Thus, further away sensors limit the overall throughput of the network. In this paper, we propose to use a multi-modulation scheme, which trades off power for transmission duration. More specifically, in this scheme, sensors closer to the exciter use a higher-order modulation, which requires more power than a lower-order modulation assigned to further away sensors, for the same bit error rate of all the sensors’ transmissions. This reduces the transmission time of the closer sensors, while also reducing the charging time of the further away sensors, overall increasing the total network throughput. The evaluation results show that the RFID sensor network with our multi-modulation scheme has significantly higher throughput as compared with the traditional single-modulation scheme.