基于DNN的Sub-6 GHz辅助毫米波网络功率分配算法

doi:10.11959/j.issn.1000-436x.2021170

Abstract

Abstract:

Aimed at the problems of the signaling cost and power consumption in the power control measurement of the millimeter wave system, as well as the complexity caused by iteration operations, a millimeter wave link power allocation prediction algorithm using the Sub-6 GHz frequency band was proposed.Firstly, the mapping between the Sub-6 GHz band channel information and the optimal power allocation of the millimeter wave band was analyzed.Then, a deep neural network (DNN) model was utilized to realize this mapping function.To predict the power allocation of millimeter wave channel with Sub-6 GHz channel as input, the neural network was trained with the weighted mean square error minimization method (WMMSE) as the supervisor in different scenarios.The simulation results show that compared with the WMMSE algorithm in millimeter wave band, the proposed algorithm can obtain more than 97% of its sum-rate performance while taking less than 0.1% of the time.

Key words: millimeter wave communication, power allocation, deep learning, neural network

CLC Number:

TN928

Changyin SUN, Liyan LIU, Fan JIANG, Jing JIANG. DNN-based Sub-6 GHz assisted millimeter wave network power allocation algorithm[J]. Journal on Communications, 2021, 42(9): 184-193.

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References 26

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参数	值
隐藏层数/个	3
隐藏层节点数/个	200,80,80
优化器	RMSprop
学习率	2×10^-3
训练期数	500
批大小	300
数据集分割	0.8/0.2

参数	场景1	场景2	场景3
激活基站序号	[1,2,3,4]	[5,6,7,8]	[1,2,3,4]
带宽（Sub-6/mmWave）/GHz^[18]	0.5/0.02	0.5/0.02	0.5/0.02
噪声功率/(dBm·MHz^-1)^[18]	-134	-134	-134
天线数目（Sub-6/mmWave）/个	4/16	4/16	4/16
用户候选位置数/个	约1.1×10⁵	9.7×10⁴	1×10⁴
训练集样本数/个	5×10⁵	5×10⁵	5×10⁵
测试集样本数/个	5×10⁴	5×10⁴	5×10⁴

算法	场景1平均和速率/(bit·s^-1)	场景2平均和速率/(bit·s^-1)
Sub6-DNN	8.700	8.406
mmW-DNN	8.702	8.411
WMMSE	8.725	8.484

算法	平均和速率/(bit·s^-1)	耗时/s
Sub6-DNN	11.491	0.210
WMMSE	11.676	632.232
比值	98.417%	0.033%

算法	平均和速率/(bit·s^-1)	耗时/s
Sub6-DNN	11.536	0.380
WMMSE	11.814	1 381.035
比值	97.652%	0.028%

DNN-based Sub-6 GHz assisted millimeter wave network power allocation algorithm

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