This letter considers a wireless network where an access point (AP) broadcasts timely updates to several mobile users. The timeliness of information owned by a user is characterized by the recently proposed age of information. While frequently broadcasting the timely updates and always using the maximum power can minimize the age of information for all users, that wastes valuable communication resources (i.e., time and energy). For addressing the age-energy trade-off, it is critical to develop an efficient scheduling algorithm identifying broadcast times and allocating the power. Moreover, unpredictable users' movement would cause rapidly-varying communication channels; in particular, those channels can be non-stationary or adversarial. Our main contribution is to develop an online scheduling algorithm and a channel-agnostic scheduling algorithm for the mobile network with a provable performance guarantee.

中文翻译：

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在移动网络中进行及时更新的高效广播

这封信认为无线网络中的接入点（AP）向多个移动用户及时广播更新。用户拥有的信息的及时性以最近提议的信息年龄为特征。在频繁广播及时更新并始终使用最大功率的同时，可使所有用户的信息使用期限最小化，这浪费了宝贵的通信资源（即时间和精力）。为了解决年龄与能量之间的权衡问题，至关重要的是开发一种有效的调度算法，以识别广播时间并分配功率。而且，不可预测的用户移动将导致迅速变化的通信渠道。特别地，那些渠道可以是非固定的或对抗的。