NILOOFAR HASHEMZADFOROUZANMOBILE COMMUNICATION

UNIVERSITY OF TEHRAN

COGNITIVE RADIO IN 5G

COGNITIVE RADIO IN 5G

• Introduction

• Describes the mobile telephony standards evolution over the time

• 5G concept

• Cognitive Radio’ concept

• Proposed Solution for 5G: CR Based 5G

• Conclusion

Introduction

Both the cognitive radio (CR) and the fifth generationof cellular wireless standards (5G) are considered to bethe future technologies: on one hand, CR offers thepossibility to significantly increase the spectrumefficiency, by smart secondary users (CR users) usingthe free licensed users spectrum holes; on the otherhand, the 5G implies the whole wireless worldinterconnection (WISDOM—Wireless InnovativeSystem for Dynamic Operating Mega communicationsconcept), together with very high data rates Quality ofService (QoS) service applications. In this project theyare combined together into a “CR based 5G”.

First Generation Systems (1G)

•Developed in 1981

•Based on analog system

•Data speed 2.4 kbps

•Allows user to make voice calls in 1 country

•It is transmitted between radio towers using

Frequency-Division Multiple Access(FDMA).

Second Generation Systems (2G)•Developed in 1992•Based on digital system

•Services such are digital voice&SMS with more clarity

•2G are the handsets we are usingtoday, with 2.5G having morecapabilities(

Systems (3G), also known as IMT-2000 (InternationalThird Generation Mobile Telecommunications-2000

•Developed in 2001

•Speed up to 2 Mbps

•Superior quality of voice , video , data

•Good clarity in video conference

•Service : E-mail, on-line shopping/banking, games, etc.

•W-CDMA (Wideband Code Division Multiple Access) orUMTS (Universal Mobile telecommunications System).

Fourth Generation Systems (4G)also known as IMT-A (International

Mobile Telecommunications-Advanced)

•Developed in 2010

•Speed up to 100 Mbps

•High performance

•Easy roaming

•Low cost

5G Concept

The twenty-first century is surely the “century of speed”, andachieves a high evolution in all the possible domains,especially in communication . Therefore, a new technologystarted to be delineated, that will provide all the possibleapplications, by using only one universal device, andinterconnecting the already existing communicationinfrastructures—that is the fifth generation of the mobilecommunications standards—5G.

In 2009 proposed for the first time in the literature theWISDOM concept, and gave an in point 5G definition:

4G & WISDOM⇒ 5G

5G TECHNOLOGY OVERVIEW

2G 3G 4G 5G

10x-100xConnectedDevices

•Expected speedup to 1Gbps

Lower costthanpreviousgenerations

10x Battery Life for Low

Power Devices

X10 faster than 4G

Hardware & Software of 5G

5G Software:

• 5G will be single unifiedstandard of differentwireless networks, includingLAN technologies,LAN/WAN, WWWW- WorldWide Wireless Web, unifiedIP

• Internet protocol version

6(IPv6)*.

• One unified global standard.

5G Hardware:

• Uses UWB (Ultra WideBand) networks with higherBW at low energy levels

• Uses smart antenna

• Uses CDMA (Code DivisionMultiple Access)

CR Concept

CR Concept

CR Technology: Definition

CR technology is based on the fact that the licensed systems (also namedprimary systems PS) are not always using their spectrum bands; CR bringsnew radio types—cognitive radios—that should firstly, identify the existingspectrum holes, and secondly, utilize them according to an access.

Spectrum Management Implications

By spectrum sensing: it is mainly understoodthe CRs capability to detect the availablechannels, within the pre-existing systemslicensed bands.

• signal detection

• signal classification

• channel availability decision

Increasing the Performance in 5G: CR based 5G

It can be summarized that the 5G goal is tointegrate/inter-connect various types ofcommunication technologies, and the CR ability isto self integrate into the wireless worlddiversity.(Basically 5G integrates andinterconnects all the wireless technologies, andCR adapts and works with all the wirelesstechnologies.) these features are 5G essential inorder to manage the complexity induced by avariety of possible usage scenarios, on the onehand, and to minimize the spectrum, on theother hand

Conclusions

• I presented and discussed the 5G and CR technologies, and finally 5G network based on the CR functionality has been proposed.

• The proposed CR-5G network is strongly sustained by the main 5G requirements achievement through the CR use, in a high-performance manner.

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