Minimizing Age of Information with Soft Updates
Minimizing Age of Information with Soft Updates
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DOI：
10.1109/jcn.2019.000034
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发表时间：
2019-06-01
影响因子：
3.6
通讯作者：
Ulukus, Sennur
中科院分区：
文献类型：
--
作者：
Bastopcu, Melih;Ulukus, Sennur
我们考虑一个信息更新系统，其中信息提供者和信息接收者参与随着时间的推移的更新过程。与现有文献不同，现有文献中的更新是可数的（硬的），并且立即或延迟后生效，但在这两种情况下都是瞬时的，这里的更新立即开始生效，但随着时间的推移逐渐生效。我们硬币这个设置软更新。当更新过程开始时，年龄减小，直到软更新周期结束。我们限制了信息提供者和信息接收者见面的次数（更新周期的数量）和更新周期的总持续时间。我们考虑两个模型的年龄在更新期间的减少：在第一个模型中，年龄的减少率是成比例的当前年龄，在第二个模型中，年龄的减少率是常数。第一个模型导致指数衰减年龄，第二个模型导致线性衰减年龄。在这两种情况下，我们都通过确定更新的最佳开始时间和最佳持续时间来确定最佳更新方案，并受到更新周期数量和总更新持续时间的约束。
We consider an information updating system where an information provider and an information receiver engage in an update process over time. Different from the existing literature where updates are countable (hard) and take effect either immediately or after a delay, but instantaneously in both cases, here updates start taking effect right away but gradually over time. We coin this setting soft updates. When the updating process starts, the age decreases until the soft update period ends. We constrain the number of times the information provider and the information receiver meet (number of update periods) and the total duration of the update periods. We consider two models for the decrease of age during an update period: In the first model, the rate of decrease of age is proportional to the current age, and in the second model, the rate of decrease of age is constant. The first model results in an exponentially decaying age, and the second model results in a linearly decaying age. In both cases, we determine the optimum updating schemes, by determining the optimum start times and optimum durations of the updates, subject to the constraints on the number of update periods and the total update duration.