A Survey on Research Activities for Deploying Cell Free Massive MIMO towards Beyond 5G

Issei KANNO
Kosuke YAMAZAKI
Yoji KISHI
Satoshi KONISHI

Publication
IEICE TRANSACTIONS on Communications   Vol.E105-B    No.10    pp.1107-1116
Publication Date: 2022/10/01
Publicized: 2022/04/28
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2021MEI0001
Type of Manuscript: Special Section INVITED PAPER (Special Section on Multidisciplinary and Innovative Key technologies in Advanced communication systems (MIKA))
Category: 
Keyword: 
cell free massive MIMO,  beyond 5G,  deployment,  antenna distribution,  fronthaul,  scalability,  

Full Text: FreePDF(2.5MB)

Summary: 
5G service has been launched in various countries, and research for the beyond 5G is already underway actively around the world. In beyond 5G, it is expected to expand the various capabilities of communication technologies to cover further wide use cases from 5G. As a candidate elemental technology, cell free massive MIMO has been widely researched and shown its potential to enhance the capabilities from various aspects. However, for deploying this technology in reality, there are still many technical issues such as a cost of distributing antenna and installing fronthaul, and also the scalability aspects. This paper surveys research trends of cell free massive MIMO, especially focusing on the deployment challenges with an introduction to our specific related research activities including some numerical examples.