A roadmap towards connected living: 5G mobile technology

Abstract

Internet of things connecting everyone requires vast networking connection. Trillions of devices are supposed to be connected due to IoT. The growing need of connectivity resulted in development of mobile networks from 1G towards 5G. Digitally connected world demands enormous bandwidth & flexible network. They need superior throughput, increased data rate, improved network capacity and less delay in the system. The expectations from 5G are getting high. With capacity a thousand times greater and data rates up to 20 Gbps. 5G contribute novel radio frequency band like 6 GHz. 5G has advanced features which helps to resolve many problems. Audio video streaming, mobility, switching network, slow network connection, buffering & loading problems were sorted with 5G. It enables cloud based services with its accessibility and flexibility features. The aim of 5G is to provide very low latency, improvement in QoS & increased rate of data. All features of 5G such as speed, cell distribution, mm wave, latency, spectrum, MIMO, slicing are discussed. Literature Survey on 5G wireless communication technology provides an analysis of recent advances towards 5G, their limitations, challenges, countermeasures and future research areas. All stakeholders, such as industry, academics, researchers, mobile operators, vendors, standardization authorities, regulatory bodies are working together for deployment of 5G. The data and information related to 5G which is accumulated from all stakeholders provides an overview of 5G and anticipated 5G technologies. There is significant research & developments going on in 5G networks by different research groups. Their work is highlighted in this paper. This will give new directions in research and will pave the way to new applications. 5G will be supporting different kind of services required by the user. OFDM (Cyclic-Prefix) is not good enough for such kind of services. To fulfill these service requirements, an improved waveform is needed. This paper provides performance comparison of the candidate waveforms like GFDM, BFDM, FBMC, UFMC, NOMA and different variants of OFDM. Based on above result analysis and discussions a new waveform is proposed which overcomes the disadvantages of previous waveforms in use. An improved alternative waveform and multiple access technique proposed is a good initiative. Better results are possible by combining these two methods Windowed & Filtered OFDM. WFOFDM supports MQAM modulation. Hybrid WFOFDM is a good waveform contender resulting in improved performance, reduced OOB emission in shorter (6 or 8) window length, increased spectrum efficiency. This proposed new improved waveform is flexible and is also compatible with new multiple access technique and new modulation scheme.