Challenges of 5G Network and Technologies Used to Tackle the Problems

Abstract

In the future generation of network, data traffic in cellular network increasing rapidly. With the explosive growth of mobile internet application, mobile users are also increased. The prime objective or demands that need to be addressed are increased capacity, improved data rate, decreased latency, and better quality of service then 4G. This paper presents some key technologies used in 5 th generation (5G) network which are helpful to meet the demands of users. In this we focus on the Millimeter-wave and Massive multiple-input multiple-output (M-MIMO) technology which helps to increase the data rate (in Gbps). Along with this device-to-device (D2D) communication, densification of network, machine-to-machine communication are the technologies which are very useful to deal with the challenges like spectral efficiency, end-to-end latency and number of connected devices. At last we will see the development of 5G around the world. KEYWORD: Massive multiple input multiple output [MIMO], small cells, milimeter wave [mmwave], ultra-densification, machine-to-machine.I. INTRODUCTION With the popularization of wireless multimedia communication, the wireless traffic is predicted to be increased more than 100 times in the next decade. So this explosive demand of mobile data results in several challenges which shifted the research directions to the fifth generation networks [1]. 5G networks are intended to provide significantly high data rate access and guaranteed quality-ofservice (QoS). Some new technologies e.g. massive multi-input multi-output antennas [MIMO], millimeter wave, device-to-device communication (D2D), energy efficient communications and small cell networks are developed to support high speed wireless transmission in future fifth generation (5G) mobile communication system [2]. Heterogeneous network (HetNet) is an evolutionary path to the fifth generation communications [3]. HetNet uses the multiple radio access technologies. It support much more efficient resource utilization and meet the quality of service requirement. The objective of 5G network is to increased capacity, improved data rate, decreased latency and better quality of services with respect to 4G. The various challenges occur in 5G network is high traffic volume, intercell interference, increased small cell, improved energy consumption and massive connectivity. A. High traffic volumeThe future requirement is to increase 1000x data traffic for 2020 and beyond. B. Increased small cellThe majority of mobile traffic volume is make by small cell or hotspot. C. Intercell interferenceUltra-dense network is responsible for intercell interference. D. Massive connectivityHigher number of connected devices (50 billion connected device by 2020) are supported by internet of things (IoT) and machine to machine (M2M) communication E. Energy consumption 5G Green network is used to improved energy consumption.F. Increased data rate 10 to 100 times increased typical data rate.