International Mobile Telecommunication 2020 (IMT-2020) and Beyond

International Telecommunication Union kicked off global race towards next generation mobile Network IMT-2020 and beyond in early 2012. Major challenges in the next generation mobile communication network is enhanced spectral efficiency due to scares in frequency band standardized for mobile communication and green energy communication to reduce CO2 emission.

In user point of view, high speed data traffics and user following services are in demand. Higher user data traffic demands and lower energy consumption in network operations will be addressed with heterogeneous network deployment with densely deployed low power nodes which are used to transmit and receive user traffics and high mobility user demand and high probability interference within heterogeneous environments will be addressed with coordinated spatial signal processing in cloud and so the network structure is Heterogeneous Cloud Radio Access Network (H-CRAN). 

Micro-Base Stations (MBSs) are deployed for control signaling and seamless coverage and MBSs are high power nodes in H-CRAN. 

Network Information Theory and 5G

Once the LTE is introduced, Heterogeneous network is in existence with higher probability of interference since there is no static frequency planning rather dynamic. 

On the move to 5G, IMT-2020 cloud computing technique is introduced and large scale co-operative spatial signal processing will be done on cloud and one of the processing is network information coding and decoding. As spectral efficiency is one of the challenge in 5G, and the solution is H-CRAN which uses wide range of frequency bands and higher frequency bands also introducing severe interference in 5G. This network information processing could be promising key technology to battle against interference in next upcoming wireless communication 5G, which could be either inter-tier or intra-tier.