WIRELESS TECHNOLOGHNOLOGY


FEAT RE FEA ATUR E


Ensuring fail -safe, supercharged 5Gmobile


Ensuring fail-safe, supercharged 5G mobile


Fifth-generation (5G) mobile communications technology will bring new experiences to the world by connecting more devices and diverse endpoints than ever before. For operators, it ise


Fi h-gener tion (5G) m bi sin ss m Ma com s a fading, W


Marketing at Viavi Solutions looks at how we can learn from past mistakes - patchy service, fading, weak signals and variable quality of experiences - to deliver a robust future network


rld by connecti g m re devices and diverse endpoints than ever before. For operators, promises new business modells and efficiencies. Here Kashif Hussain, CellAdvisor Solutions Viavi Solutions


fficie cie . H re ak signals and variabl hilst the introduction of supercharged 5G technologies is


gathering pace, over half of worldwide mobile connections are still on 2G, indicating that operators are at different points on the path to 5G. Consortiums and collaborative efforts to unite 5G development are gaining more headway. The EU has been pushing through its Horizon 2020 and 5G-PPP proj


ojects for


some time, and it is now beginning to bear fruit,most recently with the


presentation of the European 5GManifesto. Despite the huge potenti will not be without its chall


enges. In the al for 5G it


UK in particular, 5G will necessitate the installation of new transmitters


nationwide, the right regulation for a flourishing and competitive market and the right skills and diagnostic tools to ensure proper management of the infrastructure. Part of that process is looking at the network infrastructure technology, and a bigger part of that is the diagnostics that maintain and manage themmore easily.


,


There is no point rolling out superfast 5G networks if there is no 5G-specific monitoring and testing equipment to diagnose faults, monitor tr affic and analyse usage and performance. New technologies to provide test, measurement, assurance, and


optimisation solutions for lab and field trials for network and services must be rolling out alongside the new networks to help enable our next-generation vision for a faultless ‘always-connected’ society and the Internet of Things.


The right test andmeasurement tools will helpmobile network operators (MNOs) and network equipmentmanufacturer s (NEMs) avoid the issues seen during the evolution of wireless networks to 4G, which resulted in the networks failing at times or running slowly. One of these issues in particular is interfe Interference in cellular ne


tworks is one rence.


of the most common problems in the shif H ssain, C llA sor S lutio


o ks at how we can l arn f ompastmstakes - patchy ser qual y of ex


e , riences - to deliver a rob st future n twork


routinely monitored in order to maximise service performance.


The most commonly used test method to detect interference is spectrum


analysis, which performs measurements on frequency domain. This indicates the amount of energy or power transmitted at each frequency. RF Test Analysers performspectrumanalysis with configurable filters (for example, resolution bandwidth and video


bandwidth) and power adjustments (for example, attenuation, averaging, and pre-amplification) for the proper


characterisation of interference signals in the spectrum. These analysers also provide several tools for signal


examination such as maximum hold, trace overlay and power-limit mask s, among others. All are very useful for detecting interference signals.


,


spectrumto avo video broadcasti


radio access network (RAN). Different systems and services such as mobile communications, mobile radios, paging, wireless local area networks, and digital ng each use an assigned id transmitting different


services at the same frequency - causing signal collisions or interference. Signal interference in wireless networks


negatively affects transmission coverage and mobile network capacity, limiting overall network performance .


CHAL ENGES PRESEN


NCREASE I IN TRANSMITTERS Unavoidable signal interference is becoming more prevalent in wireless networks with the increasing number of active transmitters on the RF spectrum. In addition to th spectrumis also


CHALLENGES PRESENTED BY AN IINCREASE N


ANSMITTERS


occupied by unlicensed e licensed systems, the


transmitters, while reflection due to dense urban environment can cause signal distortion. This is creating a very complex environment which must be


/ ELECTRONICS ELECTRONICS AN Figure 1:


Figure 1: Te


Testing, analysing,


esting, analysing, defdefining andining and


collaboratcollaboration is the pathion is the path tto success in delivering the supercharged vision e communication


network


o success in delivering the supercharged vision o futurof future communicationf networks


Base station analysers can be augmented with embedded baseband unit (BBU) emulation to enable comprehensive testing during remote radio head (RRH) installations at cell sites, to re


nications technology wi br g new exper ences to the


reduce the need for repeat site


visits and tower climbs, speed up deployment times and cut operational expenses .


FUNDAMENTA FUNDAMENTAL TEST NG FOR


quality-of-experience higher traffic capacity,


reliability, very low (Qo STIING FOR 5G


The evolving fifth generation (5G) cellular wireless networks are envisioned to provide enhanced end-user QoE) and ultra-high gy


optimisation. 5Gwill featuremany types of newtechnologies that require a new


owlatency and energy re


approach to test andmeasurement including spectrumreuse and use of different bands, (for examplemmwave communication using 28~GHz and 38~GHz bands),multi-tier networks D2Dcommunication, CRA


, RA N,


massive-MIMO, heterogeneous andmulti- tier networkM2Mcommunication aswell as self-orga


ganising and cognitive networks. Viavi Solutions


viavisolutions.com T: +1 844 468 4284)


viavisolutions.com ELEC ELECTRONICS | DECEMBER ANUAR 201 ECEMBER/JANUARY 2017 29 29


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56