4G与5G双网共存时能效最优策略

doi:10.11959/j.issn.1000-0801.2022098

Abstract

Abstract:

The energy efficiency of wireless networks has gradually become an important indicator for evaluating network performance.It’s very important to improve the energy efficiency of the coexisting 4G and 5G networks as there are differences in energy efficiency of them.Firstly, the energy consumption composition of base station was analyzed, energy consumption models for 4G and 5G base stations through measured data were established, and then its energy efficiency was evaluated through simulations.The results show that 4G and 5G have their own optimal energy-efficiency areas separated by the critical point of 500 Mbit/s, above which the 5G energy efficiency is better.When dual networks operate simultaneously under the proposed-solution where only 4G is used when the throughput is less than 500 Mbit/s and only 5G is used otherwise, the power consumption of a single station can be reduced by 53.4% and the energy efficiency can be improved by 116.4%.

Key words: 4G, 5G, coexistence network, energy efficiency

CLC Number:

TP393

Yahui XUE, Zecai SHAO, Chunfeng CUI, Jing JIN, Hanning WANG. Optimal strategy for maximizing energy efficiency of 4G and 5G coexistence network[J]. Telecommunications Science, 2022, 38(9): 187-192.

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RU利用率	0	5%	10%	15%	20%	30%	40%	60%	80%	100%
RRU功耗/（W·h）	99.07	116	138	155	168	202	249	318	390	465

RU利用率	0	5%	10%	15%	20%	30%	40%	60%	80%	100%
AAU功耗/（W·h）	361.8	376	390	411	425	451	488	556	612	677

参数	4G	5G
带宽	单载波20 MHz，共9个载波	单载波100 MHz，共3个载波
每用户最大流数	2	4
帧结构	DDDUU	DDDUU
基站数	19	19
站间距/m	500	500
天线高度/m	25	25
天线垂直间距（λ）	0.8	0.8
天线水平间距（λ）	0.5	0.5
单天线增益/dB	8	8
终端室外比例	20%	20%

参数	特征
文件大小（S）	2 MB或0.5 MB，每个用户下载一个文件
用户到达速率（λ）	用户到达速率λ符合泊松分布

Optimal strategy for maximizing energy efficiency of 4G and 5G coexistence network

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