On the Multi-Activation Oriented Design of D2D-Aided Caching Networks
On the Multi-Activation Oriented Design of D2D-Aided Caching Networks
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DOI：
10.1109/globecom38437.2019.9013390
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发表时间：
2019-12
期刊：
影响因子：
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通讯作者：
Yang Cai;A. Molisch
中科院分区：
文献类型：
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作者：
Yang Cai;A. Molisch
在无线边缘缓存已被证明是一种有前途的高效视频分发方法，特别是在设备到设备通信的帮助下。一种广泛研究的方案是将小区细分为簇，并且允许每个簇内的一对用户在每个时隙中通信。随着越来越多的设备频繁请求流行视频，同时激活多个链接可能会提高吞吐量。然而，同时允许多个链路需要解决避免请求冲突的问题，即，多个用户从同一缓存节点请求传输以及干扰管理。为了解决这些问题，本文提出了缓存策略和传输策略的新设计（即，链路调度和功率控制）。此外，每个时隙的持续时间进行了优化，以提高吞吐量。最后，一些数值结果表明所提出的设计的性能增益。
Caching at the wireless edge has proven to be a promising approach for efficient video distribution, especially when aided by device-to-device communication. A widely explored scheme is to sub- divide a cell into clusters, and allow one pair of users within each cluster to communicate in each time slot. As more devices are raising frequent requests for popular videos, activating multiple links simultaneously can potentially improve the throughput. However, allowing multiple links at the same time requires to solve the problems of avoiding request clashes, i.e., multiple users requesting transmission from the same caching node, as well as interference management. To address these issues, this paper proposes new designs of both the caching policy and the transmission policy (i.e., link scheduling and power control). Furthermore, the duration of each time slot is optimized to improve the throughput. Finally, some numerical results demonstrate the performance gain of the proposed designs.