• Koushik Barman
• Ajay Roy

Conventional cellular network architecture allows full duplex communication between two user equipments using uplink and downlink channel through base station. But this architecture does not permit direct communication between devices and therefore inefficient to fulfil various advanced applications like vehicle to vehicle communication, context aware social networking and proximity based local emergency services, real time sensor data analysis, smart city and Internet of things (IOT) applications. To overcome this problem, this article presents two tier cellular architecture that involves a base station to device tier and device to device tier. This architecture allows direct communication among devices in device tier and traditional communication in cellular tier using licensed band spectrum. Furthermore, this paper is focused on detail investigation of various technological challenges to implement two tier architecture like resource allocation technique, interference management, pricing models and optimum service discovery protocols.

Device to device communication, 5G, Service discovery

"A Novel Two Tier Architecture for Licensed Band Device to Device Communication in 5G Wireless Network.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 12, page no.398-403, December 2018, Available :http://www.jetir.org/papers/JETIRDZ06052.pdf

"A Novel Two Tier Architecture for Licensed Band Device to Device Communication in 5G Wireless Network.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 12, page no. pp398-403, December 2018, Available at : http://www.jetir.org/papers/JETIRDZ06052.pdf