Massive MIMO小区PDCCH控制信道容量提升技术研究  

Physical Control Channel Capacity Improvement in Massive MIMO Cells

作　　者：刘大洋[1] 张悦[1] 徐登军 廖繁茂 李珂[2] 蓝万顺 LIU Dayang;ZHANG Yue;XU Dengjun;LIAO Fanmao;LI Ke;LAN Wanshun(China Mobile Group Guangdong Co.,Ltd.,Guangdong Guangzhou 510623,China;Huawei Technologies Co.,Ltd.,Shenzhen Guangdong 518129,China)

机构地区：[1]中国移动通信集团广东有限公司,广东广州510623 [2]华为技术有限公司,广东深圳518129

出　　处：《通信技术》2021年第1期77-86,共10页Communications Technology

摘　　要：5G大带宽业务信道资源多,但是随着用户增多,控制信道资源提前成为瓶颈,Massive MIMO的大容量能力很难发挥出来。特别是大话务场景用户数多、用户信号质量差、用户做小包业务等均会导致PDCCH CCE受限严重。针对上述不足,重点分析了重载场景控制信道受限对MM性能的影响,保障重载场景MM小区的调度能力。所提PDCCH容量提升方法在商用网络验证过程中,能有效降低重载场景PDCCH CCE分配失败比例,CCE失败比例下降30%~40%左右,MM小区调度能力提升20%,用户感知速率增益为15%~25%,评估结果符合预期。5G large-bandwidth traffic has many channel resources,but as users increase,control channel resources become a bottleneck in advance,and it is difficult for massive MIMO’s large-capacity capabilities to be used.Especially in large traffic scenarios,there are many users,poor user signal quality,and user doing small packet services,which will cause severe PDCCH CCE limitation.In view of the above-mentioned shortcomings,the impact of the limited control channel in the heavy-load scenario on the MM performance is analyzed to ensure the scheduling ability of the MM cell in the heavy-load scenario.In the commercial network verification process,the proposed PDCCH capacity improvement method can effectively reduce the proportion of PDCCH CCE allocation failures in heavy-load scenarios.The CCE allocation failure rate decreases by about 30%to 40%,the scheduling capability of massive MIMO cells increases by 20%,and the user-perception rate gain is 15%to 25%.And the evaluation result meets the expectations.

关 键 词：PDCCH CCE Massive MIMO 自适应 用户感知速率 

分 类 号：TN915[电子电信—通信与信息系统]