Edge cache service (ECS), as a prospective edge network service paradigm, can significantly reduce the data transmission latency and improve the Quality of Service (QoS) of digital content providers by offloading content data to edge devices in the network. Compared to centralized content service, ECS can provide digital content from nearby edge devices via a high-speed wireless network with fewer hops. However, how to motivate edge devices to share their cache resource and ensure the reliability of content data under the diversity of device behavior remains a challenging issue. In this article, we aim to design an ECS framework for cache resource trading and digital content sharing in the edge network. By using blockchain-based credentials, we first provide the cache resource trading mechanism for the trading between the content provider and edge devices. Then, we give a double auction mechanism for digital content trading between edge devices. The experimental results show the proposed framework can greatly improve the matching efficiency of cache resources and reduce the data transmission overhead in edge networks.

中文翻译：

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基于区块链的面向边缘网络的分布式缓存框架

边缘缓存服务（ECS）作为一种潜在的边缘网络服务范例，可以通过将内容数据卸载到网络中的边缘设备上，从而显着减少数据传输延迟并提高数字内容提供商的服务质量（QoS）。与集中式内容服务相比，ECS可以通过跳数更少的高速无线网络从附近的边缘设备提供数字内容。但是，如何在设备行为多样化的情况下激励边缘设备共享其缓存资源并确保内容数据的可靠性仍然是一个具有挑战性的问题。在本文中，我们旨在设计一种ECS框架，用于边缘网络中的缓存资源交易和数字内容共享。通过使用基于区块链的凭证，我们首先为内容提供商与边缘设备之间的交易提供缓存资源交易机制。然后，我们为边缘设备之间的数字内容交易提供了一种双重拍卖机制。实验结果表明，该框架可以大大提高缓存资源的匹配效率，减少边缘网络的数据传输开销。