5G Main Technical focus
The absence of official standards from 3GPP, ITU-R makes the 5G have limitless possibilities for innovation.It allows user able to access different Radio Access Technologies(RAT) using one mobile. It has been proposed to assemble the existing wireless and wired communication techniques into an all IP high performance world wide network. WWWW[World wide wireless web] which allows the subscriber quick access to the internet, dynamic movement, Favorable Bit Error Ratio(BER) and great security.It uses the resources other than frequency/time in order to increase a capacity of the system.
What is Flat IP based Network
- 3G = Operator-centric Design
- 4G = Service-centric Design
- 5G = User centric Design
Network layer will be divided into three sub layers lower, middle and upper to provide All-IP connectivity. All-IP Network (AIPN) system developed in LTE. Flat IP based network will be used in 5G. It provides a way to identify each device using symbolic names. IPv6 addressing scheme used in Flat IP network. Each device have fixed IPv6 address and multiple Care of Address(CoA). The number of CoA for the device is according to the number of networks where devices is connect. lower network layer uses CoA, middle network layer translates the CoA to IPv6 address and upper network layer network uses IPv6 address.
What is Cognitive Radio
Interoperability was an important things in any wireless technology. It means any system with different technologies can work together and communicate with each other. 5G network architecture consists of a user terminal and no. of different radio technology. Cognitive radio is an intelligent communication system that is aware of its surrounding environment and choose the best wireless technology for communication.
Security related issues
Cognitive Radio has ability to scan the available spectrum, select from a wide range of operation frequency, there are challenges related to security, such as selfish misbehaviors, harmful interference and licensed user emulation. The proposed method to solve this problem is TRIESTE (Trusted Radio Infrastructure for Enforcing SpecTrum Etiquettes). It will able to ensure that radio devices are only able to access and use the spectrum in a manner that conforms to their privileges.
Limited frequency Spectrum Resource
It is a major challenge for mobile and wireless technologies. To solve this problem currently we have different multiple access methods like Time Division Multiple Access(TDMA), Frequency Division Multiple Access(FDMA), Code Division Multiple Access(CDMA), OFDMA(Orthogonal Frequency division Multiple Access). But all these techniques are based on time and frequency. But in 5G technology we need to develop a multiple access system which is not dependent on time and frequency. So a new multiple access technology proposed called BDMA(Band/Beam Division Multiple Access)
For adapting the BDMA system in 5G, the development of the phase array antenna is required. The smart antenna with the ability to switch its beam is needed. Switched bean antennas support radio positioning via Angle of Arrival(AOA) information collected from base and mobile station.
5G technology provides lots of opportunities for the researcher to come up with the solution to solve the above mentioned problems. This field has lots of potential for new ideas. I hope you all get some idea in this article let start contribute the world next fastest developing technology to touch the billions people.