arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1802.01563cs.ITcs.NIeess.SPmath.IT
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随机电池充电能量收集传感器的最小在线策略

Age-Minimal Online Policies for Energy Harvesting Sensors with Random Battery Recharges

Ahmed Arafa, Jing Yang, Sennur Ulukus

摘要:

我们考虑一个能量收集传感器,该传感器将关于某些物理现象的测量更新发送到目的地。该传感器依靠从自然界收集的能量来测量和发送其更新,并配备了一个有限大小的电池来收集其收集的能量。能量收集过程是具有单位速率的泊松,并且以完全充电电池的量到达。我们的设置是在线的,因为能量到达的时间在能量被收集后被因果地透露给传感器;只有到达过程的统计数据是先验已知的。更新需要以及时的方式发送到目的地,即,使得信息的长期平均年龄在通信过程中最小化。信息的存在时间定义为最新更新到达目标后所经过的时间。我们首先表明,最优调度更新策略是一个更新策略,然后表明,它有一个多阈值结构:传感器发送更新,只有当年龄的信息增长超过一定的阈值,取决于可用的能量。

英文摘要:

We consider an energy harvesting sensor that is sending measurement updates regarding some physical phenomenon to a destination. The sensor relies on energy harvested from nature to measure and send its updates, and is equipped with a battery of finite size to collect its harvested energy. The energy harvesting process is Poisson with unit rate, and arrives in amounts that fully recharge the battery. Our setting is online in the sense that the times of energy arrivals are revealed causally to the sensor after the energy is harvested; only the statistics of the arrival process is known a priori. Updates need to be sent in a timely manner to the destination, namely, such that the long term average age of information is minimized over the course of communication. The age of information is defined as the time elapsed since the freshest update has reached the destination. We first show that the optimal scheduling update policy is a renewal policy, and then show that it has a multi threshold structure: the sensor sends an update only if the age of information grows above a certain threshold that depends on the available energy.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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