Floating Content (FC) is a communication paradigm to locally share ephemeral content without direct support from infrastructure. It is based on constraining the opportunistic replication of content in a way that strikes a balance between minimizing resource usage and maximizing content availability among the intended recipients. However, existing approaches to management of FC schemes are unfit for realistic scenarios with non-uniform user distributions, resulting in heavy overdimensioning of resources allocated to FC. In this work, we propose a new version of FC, called Cellular Floating Content (CFC), which optimizes the use of bandwidth and memory by adapting the content replication and storage strategies to the spatial distribution of users, and to their mobility patterns. The main idea underlying our approach is to partition users into small “local communities”, and to optimally weight their contributions to the FC paradigm according to their specific mobility features, and to the resources required to achieve a target performance level. We characterize numerically the properties of the optimal strategies in a variety of mobility patterns and traffic conditions, showing the accuracy of our approach, and the significant savings it enables in the amount of resources necessary to run FC, which in a realistic setup can be as high as 27% with respect to traditional FC dimensioning strategies.

浮动内容（FC）是一种通信范例，可以在本地共享临时内容，而无需基础架构的直接支持。它基于限制内容的机会复制的方式，在希望的接收者之间最小化资源使用和最大化内容可用性之间取得平衡。但是，现有的FC方案管理方法不适用于用户分布不均匀的实际情况，从而导致分配给FC的资源严重超支。在这项工作中，我们提出了一种新的FC版本，称为Cellular Floating Content（CFC），它通过使内容复制和存储策略适应用户的空间分布及其移动方式来优化带宽和内存的使用。我们方法的主要思想是将用户划分为小的“本地社区”，并根据其特定的移动功能以及实现目标性能水平所需的资源，对他们对FC范式的贡献进行最佳加权。我们用数值方法表征了各种移动性模式和交通状况下最佳策略的属性，显示了我们的方法的准确性，以及它在运行FC所需的大量资源方面所节省的大量资金，在实际设置中可以是相对于传统FC尺寸确定策略而言，这一比例高达27％。