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arXiv 1304.7429cs.NI
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高吞吐量无线视频网络的基站辅助设备到设备通信

Base-Station Assisted Device-to-Device Communications for High-Throughput Wireless Video Networks

Negin Golrezaei, Parisa Mansourifard, Andreas F. Molisch, Alexandros G. Dimakis

摘要:

我们提出了一种新的方案,用于增加蜂窝通信系统中的视频文件的吞吐量。该方案利用(i)用户请求的冗余以及(ii)智能手机和平板电脑的可观存储容量。用户缓存流行的视频文件,并在收到其他用户的请求后,通过设备到设备的本地化传输服务这些请求。当文件请求发生时,当中央控制先验地知道无线设备的位置时,文件放置是最佳的。然而,即使是一个纯粹的随机缓存方案相比,这样的精灵辅助计划只显示出轻微的性能损失。然后,我们分析了最佳的协作距离,权衡频率重用的概率内找到一个请求的文件的协作距离。我们表明,一个到两个数量级的频谱效率的改善是可能的,即使有没有很高的冗余视频请求。

英文摘要:

We propose a new scheme for increasing the throughput of video files in cellular communications systems. This scheme exploits (i) the redundancy of user requests as well as (ii) the considerable storage capacity of smartphones and tablets. Users cache popular video files and - after receiving requests from other users - serve these requests via device-to-device localized transmissions. The file placement is optimal when a central control knows a priori the locations of wireless devices when file requests occur. However, even a purely random caching scheme shows only a minor performance loss compared to such a genie-aided scheme. We then analyze the optimal collaboration distance, trading off frequency reuse with the probability of finding a requested file within the collaboration distance. We show that an improvement of spectral efficiency of one to two orders of magnitude is possible, even if there is not very high redundancy in video requests.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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