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首页> 外文期刊>Wireless Communications Letters, IEEE >Optimal Content Sharing Mode Selection for Social-Aware D2D Communications
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Optimal Content Sharing Mode Selection for Social-Aware D2D Communications

机译：社交感知D2D通信的最佳内容共享模式选择

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摘要

Device-to-Device (D2D) content sharing is regarded as an effective way to support an explosion in demand for content sharing and local services. The underlying principle is that the more popular contents are cached in more user devices, and accordingly, a user would directly obtain the desired contents from one/some of its neighbours via D2D communications. Due to the random content location, and the limited storage and transmission capacity of devices, how to optimally match potential providers to demanders of contents is of importance. In this letter, we define the social-aware user connection performance by integrating the average link rate and the social reciprocity, where the former ensures the successful content delivery, and the latter stimulates mutual cooperation. Subsequently, we construct a general social welfare maximization to formulate the social-aware content sharing mode selection problem. Due to its intractability, we exploit the properties of total unimodularity to simplify it to its linear relaxation without loss of optimization. In this way, the proposed scheme not only integrates the advantages of physical and social information, but also provides a universal paradigm to achieve the optimal matching between demanders and potential providers through simple and online implementation.
机译：设备到设备（D2D）内容共享被认为是支持内容共享和本地服务需求激增的有效方法。基本原理是，更流行的内容被缓存在更多的用户设备中，因此，用户将通过D2D通信直接从一个或多个邻居中获得所需的内容。由于内容的随机位置以及设备的有限存储和传输能力，如何使潜在的提供者与内容的请求者最佳匹配非常重要。在这封信中，我们通过综合平均链接速率和社交互惠性来定义社交感知用户连接性能，其中前者确保成功交付内容，而后者则促进相互合作。随后，我们构建了一般性的社会福利最大化，以制定社会意识内容共享模式选择问题。由于其难处理性，我们利用总单模的性质将其简化为线性松弛，而不会损失优化。这样，所提出的方案不仅整合了物理和社会信息的优势，而且还提供了一种通用的范式，以通过简单且在线的实现来实现需求者和潜在提供者之间的最佳匹配。

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