论文标题
具有可靠备份能量的能源收集传感器的最佳更新
Optimal Update for Energy Harvesting Sensor with Reliable Backup Energy
论文作者
论文摘要
在本文中，我们考虑了一个信息更新系统，无线传感器通过擦除能量和可靠的备份能量的供应将无线传感器及时向目的地发送到目的地。采用信息的度量时代（AOI）来衡量目的地收到的更新的及时性。我们的目标是通过制定无限国家马尔可夫决策过程（MDP）来找到最小化AOI的时间平均加权和可靠的备份能源成本的最佳信息更新策略。最佳信息更新策略被证明具有阈值结构。基于这种特殊的结构，提出了用于有效计算最佳策略的算法。数值结果表明，最佳更新策略提出的优于基线策略。
In this paper, we consider an information update system where a wireless sensor sends timely updates to the destination over an erasure channel with the supply of harvested energy and reliable backup energy. The metric Age of Information(AoI) is adopted to measure the timeliness of the received updates at the destination. We aim to find the optimal information updating policy that minimizes the time-average weighted sum of the AoI and the reliable backup energy cost by formulating an infinite state Markov decision process(MDP). The optimal information updating policy is proved to have a threshold structure. Based on this special structure, an algorithm for efficiently computing the optimal policy is proposed. Numerical results show that the optimal updating policy proposed outperforms baseline policies.
