Joint Optimization of Power Consumption and Transmission Delay in a Cache-Enabled C-RAN
Joint Optimization of Power Consumption and Transmission Delay in a Cache-Enabled C-RAN
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DOI：
10.1109/lwc.2020.2981330
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发表时间：
2020-08-01
影响因子：
6.3
通讯作者：
Nasiri-Kenari, Masoumeh
中科院分区：
文献类型：
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作者：
Bafghi, Ali H. Abdollahi;Mirmohseni, Mahtab;Nasiri-Kenari, Masoumeh
在这封信中，我们考虑了一个支持缓存的云无线电接入网络，具有单天线基站和单天线移动的用户。每个基站可以经由具有有限容量的单独回程链路来访问网络的中央处理器。我们利用干扰对齐方案作为基站和用户之间的传输策略。通过假设块传输方案，我们定义了相关的数据传输延迟。我们推导出传输延迟和网络功耗。最后，利用DC规划算法解决了数据传输时延和网络功耗的联合优化问题。在我们的数值计算结果中，我们调查延迟和功耗之间的权衡，并与先前的工作，不考虑传输延迟在其优化问题的结果进行比较。
In this letter, we consider a cache-enabled cloud radio access network with single-antenna base stations and single-antenna mobile users. Each base station can access the central processor of the network via a separate backhaul link with limited capacity. We utilize the interference alignment scheme as the transmission strategy between base stations and users. By assuming a block transmission scheme, we define a related data transmission delay. We derive the transmission delay and network power consumption. At last, we solve the problem of joint optimization of data transmission delay and network power consumption using DC programming algorithm. In our numerical results, we investigate the trade-off between delay and power consumption, and compare the results with those of a prior work that does not take the transmission delay into account in its optimization problem.