Challenges for beyond 5G: ultra-densification of radio access network

Fumiyuki Adachi, Ryo Takahashi, Hidenori Matsuo

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Ultra-densification of radio access network (RAN) is a key to efficiently support the exponentially growing mobile data traffic in 5G era. Furthermore, extremely high frequency band like mmWave band was utilized to solve the bandwidth shortage problem. However, untra-dense reusing the same radio resource produced severe interference. And the mmWave link was very harsh due to frequent blockage by obstacles. Therefore a new RAN architecture needed to be introduced to realize ultra-reliable communications in such a severe radio propagation environment. An architecture of distributed MIMO based RAN was presented. Then, enhanced interference coordination (eIC) was described. Finally, the effectiveness of distributed MIMO based RAN with eIC by computer simulation was showed.

Original languageEnglish
Pages (from-to)1-11
Number of pages11
JournalTongxin Xuebao/Journal on Communications
Issue number11
Publication statusPublished - 2020 Nov 25


  • 5G advanced systems
  • Cooperative signal transmission
  • Distributed MIMO
  • Interference coordination
  • Radio access network


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