Ultra-densification of radio access network (RAN) is essential to efficiently handle ever-increasing mobile data traffic. In ultra-dense RAN consisting of a large number of distributed antennas and users, the computational complexity of large-scale multi-user MIMO (MU-MIMO) becomes prohibitively high. To solve this complexity problem, users can be grouped into several clusters and cluster-wise MU-MIMO is carried out using the same radio resource simultaneously. However, strong inter-cluster interference is produced. Furthermore, distributed radio resource management (RRM) is desirable to make possible highly scalable and flexible deployment of ultra-dense RAN. However, in return, inter-cell interference is produced. Recently, in order to mitigate these interferences, the authors presented the concept of enhanced interference coordination (eIC) for ultra-dense RAN. In this paper, we describe the eIC using multi-layered user clustering and evaluate the user capacity, the sum capacity, and the fairness among users by computer simulation to show the effectiveness of the proposed eIC.
Performance of Enhanced Interference Coordination Using Multi-layered Clustering for 5G Advanced Ultra-dense RAN
2021-04-01
2289043 byte
Conference paper
Electronic Resource
English