Secure Content Delivery With Edge Nodes to Save Caching Resources for Mobile Users in Green Cities
Secure Content Delivery With Edge Nodes to Save Caching Resources for Mobile Users in Green Cities
复制标题
使用边缘节点进行安全内容交付，为绿色城市中的移动用户节省缓存资源
DOI：
10.1109/tii.2017.2787201
复制
发表时间：
2018-06-01
影响因子：
12.3
通讯作者：
Dong, Bo
中科院分区：
文献类型：
--
作者：
Xu, Qichao;Su, Zhou;Dong, Bo
为了在绿色城市的内容传递过程中节省能源，最近提倡在靠近移动社交用户的边缘节点上缓存内容。然而，如何合理分配有限的缓存资源并保证内容的安全传递成为一个新的挑战。因此，在本文中，我们提出了一种新的理论模型来提供具有边缘节点的安全内容，以节省绿色城市的能源。首先，我们提出了一个反向拍卖游戏，以激励边缘节点合作提供缓存服务。利用该模型，移动用户可以根据移动用户与边缘节点之间的交互来确定缓存内容的候选边缘节点。其次，设计了一种基于直接信任评估的边缘节点候选节点可靠性评估方法；最后，大量的仿真结果表明，与传统的方法相比，该方案可以在安全的内容传输中节省能源，并且可以提高获取内容的延迟和缓存率。
To save energy during content delivery in green cities, caching contents on edge nodes that are placed near mobile social users has been advocated recently. However, how to allocate the limited caching resources with secure content delivery becomes a new challenge. Therefore, in this paper, we present a novel theoretical model to deliver secure content with edge nodes in order to save energy for green cities. First, we present a reverse auction game to encourage edge nodes to cooperatively provide caching services with incentives. With the model, mobile users can determine the candidate of edge node to cache content based on the interaction between mobile users and edge nodes. Second, a trust management method is designed to evaluate the reliability of the selected candidate of edge node by considering the direct trust evaluation. Finally, extensive simulations show that the proposal can save energy with a secure content delivery where both the delay to obtain the content and the caching ratio can be improved compared with the conventional methods.