Cache-Aided Device-to-Device Non-Orthogonal Multiple Access
Cache-Aided Device-to-Device Non-Orthogonal Multiple Access
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DOI：
10.1109/vtc2020-spring48590.2020.9129503
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发表时间：
2020-02
期刊：
影响因子：
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通讯作者：
Kevin Z. Shen;Turki E. A. Alharbi;D. So
中科院分区：
文献类型：
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作者：
Kevin Z. Shen;Turki E. A. Alharbi;D. So
随着人们对丰富内容的需求不断增加，对系统容量的要求也越来越高，未来的移动网络需要新的传输技术。为了提高系统的和速率性能，本文提出了一种新的缓存辅助（CA）设备对设备（D2D）非正交多址（NOMA）系统，该系统采用了启用缓存的干扰抵消（CIC）技术。利用一对用户的上行通道，拟议的系统允许两个用户通过D2D链路相互交换先前缓存的内容，而不是仅通过传统方法从基站接收内容。推导了该方法的和率，并分析了其优于CANOMA的精确区域。仿真结果验证了分析结果，当用户距离较近时，CA-D2D NOMA是CA-NOMA的首选传输技术。结果还表明，当系统根据导出的区域在两种NOMA方案之间切换时，可以获得最佳的和速率性能。
With increasing demand in rich content driving up the need for increased system capacity, novel transmission techniques are required for future mobile networks. In this paper, a novel cache-aided (CA) device-to-device (D2D) non-orthogonal multiple access (NOMA) system employing cache-enabled interference cancellation (CIC) is proposed to increase the system sum rate performance. Utilising the uplink channels of a pair of users, the proposed system allows both users to exchange previously cached content with each other over a D2D link instead of receiving them only from the base station in conventional approaches. The sum rate of the proposed approach is derived and analysis shows an exact region in which it outperforms CANOMA. Simulation results verify the analytical results that when the users are close together, CA-D2D NOMA is the preferred choice of transmission technique over CA-NOMA. The results also show that the best sum rate performance is obtained when the system switches between the two NOMA schemes based on the derived regions.