5G室内外同频组网干扰解决方案

doi:10.11959/j.issn.1000-0801.2022029

Abstract

Abstract:

5G indoor and outdoor deployment with the same frequency will lead to the decline of network coverage performance and user service experience.The causes of indoor and outdoor interference with the same frequency was systematically analyzed.The principle of three indoor and outdoor co-channel interference solutions, namely PRB random interference solution, indoor and outdoor beam cooperative interference solution and indoor multi beam interference solution were studied.The results show that the PRB random interference solution has the best interference suppression effect when the traffic load is about 30%.When the indoor and outdoor beam cooperation function is turned on when the adjacent area of the outdoor macro station is no-load or high load (70%), the improvement of the downlink rate is more obvious.When the indoor multi-beam function is turned on, the downlink rate is significantly higher than that of single beam.Finally, the deployment suggestions of co-channel interference control scheme were given.

Key words: co-channel interference, radio frequency planning, PRB randomization, beam coordination, indoor multi-beam

CLC Number:

TP393

Xirui GUO, Tao ZHANG, Qiang ZHANG, Dongyang WANG, Yan YANG. A solution for 5G indoor and outdoor co-frequency network interference[J]. Telecommunications Science, 2022, 38(2): 139-148.

Figures/Tables 19

References 13

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参数	室外宏基站	室内数字化室分
5G频段	3 400～3 600 MHz	3 300～3 600 MHz
5G载波带宽	200 MHz	200 MHz
5G子载波间隔	30 kHz	30 kHz
典型帧结构	2.5 ms双周期	2.5 ms双周期
功率控制	开启	开启
AMC	开启	开启
发射功率	320 W	4×500 mW

名称	收/发天线数和MIMO流数	最大发射功率
SA终端	4收2发、4流接收、2流发送	26 dBm

A solution for 5G indoor and outdoor co-frequency network interference

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