5G Radio Access above 6 GHz

Designing and developing a millimetre-wave(mmWave) based mobile Radio Access Technology (RAT) in the 6-100 GHz frequency range is a fundamental component in the standardization of the new 5G radio interface, recently kicked off by 3GPP. Such component, herein called the new mmWave RAT, will not only enable extreme mobile broadband (eMBB) services,but also support UHD/3D streaming, offer immersive applications and ultra-responsive cloud services to provide an outstanding Quality of Experience (QoE) to the mobile users. The main objective of this paper is to develop the network architectural elements and functions that will enable tight integration of mmWave technology into the overall 5G radio access network (RAN). A broad range of topics addressing mobile architecture and network functionalities will be covered-starting with the architectural facets of network slicing, multiconnectivity and cells clustering, to more functional elements of initial access, mobility, radio resource management (RRM) and self-backhauling. The intention of the concepts presented here is to lay foundation for future studies towards the first commercial implementation of the mmWave RAT above 6 GHz.Comment: 7 pages, 5 figure

Radio on visible light (RoVL) : an investigative study on the methods & techniques for the transmission of mobile signals through visible light channels

Ever since the first mobile telephone call was made by a Motorola researcher in 1973, mobile technology has been growing rapidly to facilitate diverse ubiquitous services. Although cell based radio technology has proved beneficial for reliable long distance transmission, it is faced with challenges when deployed in an indoor environment. With the introduction of white LED - based communication entities at the start of the 21st century, radio and other technologies have become more interdependent, with the possibility for further expansion. Bearing in mind the sophistication offered, with the rapid developments witnessed in mobile telecommunications, this thesis presents an innovative alternative for cell phone connectivity in RF restricted or poor signal connectivity region. To address the research objective of offering uninterrupted signal connectivity in an indoor environment, the term Radio on Visible Light (RoVL) was introduced in this research. Furthermore, five major attributes influencing mobile signal transmission through visible light channels were identified and addressed. The bandwidth constraint offered by a white LED was tackled with an intelligent technique of frequency translation and mapping. In addition, an electronic predistorter was designed and implemented to address the nonlinearity in an LED. For efficient data manipulation, subcarrier continuous phase technique of modulation was introduced and hardware implemented for visible light communication, with a discussion on the LED number and arrangement for efficient illumination and data transmission. Despite the presence of significant research contributions in visible light technology, the study here is specifically focussed on integrating the GSM network with that of the optical wireless systems. The existing visible light entities provide service users with a one way broadband data transmission hub, unlike the dual channel support rendered by the RoVL device as presented in this research. The techniques proposed, backed up with interesting research observations and experimental results, clearly demonstrate the capability of supporting mobile communication through optical wireless channels. The methods proposed and techniques discussed shall lay foundation in supplementing the radio based mobile technology with optical wireless entities, opening new avenues for further research & development in this direction

Radio on visible light — A new approach for indoor mobile telecommunications

The utilization of white LEDs in visible light systems for simultaneous illumination and communication is envisaged to parallely compliment the existing wireless systems for indoor applications. Although, promising contributions has been witnessed ever since its introduction, an innovative stretch to explore, is mobile telephony through visible light serving RF restricted/ poor signal connectivity regions. The following paper proposes a Radio on Visible Light Communication System, with a comprehensive discussion on its applicability and system model

System performance of radio on visible light (RoVL) communication system

Telecommunication industry has been expanding swiftly with the inception of new features and services to dispense sophistication to mankind. One promising stretch that could perhaps expand the applicability of this industry is mobile telephony through visible light channels, capable of bestowing cell phone connectivity to users in RF restricted or poor signal connectivity regions. Despite, the introduction of several modulation techniques ever since the invention of visible light technology, it is imperative to choose techniques that are spectral and band efficient. In addition, bearing the facility to be integrated into the mobile phone systems without extensive hardware modifications. To address this concern the following paper introduces a gaussian filtered method of continuous phase modulation into visible light communication. The entire communication model is hardware implemented for real time testing & measurement in company with mathematical simulations. Paramount performance parameters of the system were evaluated to confirm its pertinence for mobile signal transmission as outlined by the leading telecommunications institutes for global mobile standardization

Distortion correction in radio on visible light (RoVL) communication system for mobile applications

The demand for sophistication furnished by communication systems has led to the inception of new ways to compliment & supplement conventional communication technologies. One system that has recently captivated global attention is visible light technology utilizing white LED for synchronous illumination & communication. Although, radio setup progresses to be an integral part of mobile telecommunications in bestowing easy and instant connectivity to majority of human population. It comes with some paucity in terms of quality of service (QOS) when administering coverage to RF restricted or poor signal connectivity regions, dispensing the exploration of auxiliary means for indoor radio transmission. A subject worth considering when contemplating radio information through visible light is the slight degree of non linearity exhibited by the LED. The following paper delineates the fundamental parameters of LED nonlinearity, forming the integral foundation for experimental testing & measurements. An electronic predistorter using diode model is proposed and its performance tested using the single and two tone frequency analysis. It is evidently marked that with the predistorter, an intermodulation correction of up to 40 dBV is attained, adhering to the compelling prerequisites set by the global mobile standards to sustain indoor mobile signal transmission

Channel models for radio on visible light (RoVL) communication system

The acronym Radio on Visible Light which has already been introduced is associated with using visible light to transmit information usually carried by means of radio waves from one point to another. Essentially, the radio waves are not radiated from an antenna in the usual manner, but emitted as a modulation of the light's brightness in congruence with the strength of the radio frequency signal. To address the project objective, various attributes influencing mobile signal transmission through visible light channels have already been identified and addressed. This paper presents a brief theoretical study on the attributes of channel modeling, influencing mobile signal transmission in an indoor environment. The main purpose is to understand the behaviour and propagation of optical signals based on traditional models to improve upon the basic channel models to more sophisticated techniques that can be specifically adapted for indoor mobile telecommunications