<b>Challenges and Emerging Technology in 5G</b> 5G Mobile Wireless network system yield new challenges. In future the demand that need to be addressed are capacity, increase data rate and reduce latency. This paper focus on latest technologies used in wireless mobile communication network. In this, some emerging technologies use like device to device Communication D2D , Interference Management, Spectrum sharing with cognitive radio, network cloud and Internet of Things IoT , Massive MIMO. The IoT allows objects to be sensed or controlled remotely across existing network infrastructure and network cloud describing the access of networking resources from a centralized third party provider. Wireless network, D2D, Network Cloud, Cognitive Radio, IoT 41-48 Issue-3 Volume-2 Kiran Likhar | Shraddha Karale | Rashmi Bhat