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Achieving Collision-Free Communication by Time of Charge in WRSN

机译：在WRSN中按计费时间实现无冲突通信

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The Wireless Identification and Sensing Platform (WISP) Sample et al. (IEEE T Instrum Meas 57(11):2608-2615, 2008) has become a very promising experimental platform of wireless rechargeable sensor networks (WRSN), which integrates the sensing and computation capabilities to the traditional RFID tags. In such kind of networks, the simultaneous transmission may introduce severe communication collisions, which have attracted various research efforts for resolving such collisions at the MAC layer. However, different from existing works, we avoid such communication collisions through proper reader movement by exploiting the differences in the time of charge among rechargeable sensor nodes. We formulate the optimization problem and prove that complexity of the optimal solution is NP-hard, and propose a simple yet effective algorithm to optimize both the reader stop location and stop time for minimizing the total communication delay. Extensive simulations under different system settings show that our design can largely reduce the communication delay and outperform the baseline design by at least 20 %.
机译：无线识别和传感平台（WISP）Sample等。 （IEEE T Instrum Meas 57（11）：2608-2615，2008）已成为无线充电传感器网络（WRSN）的非常有希望的实验平台，该平台将传感和计算功能集成到传统RFID标签中。在这种网络中，同时传输可能会引入严重的通信冲突，这吸引了各种研究努力来解决MAC层的此类冲突。但是，与现有作品不同，我们通过利用可充电传感器节点之间的充电时间差异，通过适当的阅读器移动来避免此类通信冲突。我们提出优化问题，并证明最优解决方案的复杂性是NP-hard的，并提出了一种简单而有效的算法来优化读取器的停止位置和停止时间，以最大程度地减少总的通信延迟。在不同系统设置下的大量仿真结果表明，我们的设计可以大大减少通信延迟，并且比基准设计高出至少20％。

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