This document discusses cognitive radio in 5G networks. It begins with describing the evolution of mobile standards from 1G to 4G. It then introduces the concepts of 5G and cognitive radio. The key points are: - 5G will provide very high data rates up to 1 Gbps and connect many more devices. - Cognitive radio can improve spectrum efficiency by allowing unlicensed users to access licensed spectrum holes. - The document proposes a cognitive radio based 5G network that can integrate various wireless technologies and help manage network complexity using cognitive radio's abilities.

1. COGNITIVE RADIO IN 5G
NILOOFAR HASHEMZADFOROUZAN
MOBILE COMMUNICATION
UNIVERSITY OF TEHRAN

2. 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

3. Introduction
Both the cognitive radio (CR) and the fifth generation
of cellular wireless standards (5G) are considered to be
the future technologies: on one hand, CR offers the
possibility to significantly increase the spectrum
efficiency, by smart secondary users (CR users) using
the free licensed users spectrum holes; on the other
hand, the 5G implies the whole wireless world
interconnection (WISDOM—Wireless Innovative
System for Dynamic Operating Mega communications
concept), together with very high data rates Quality of
Service (QoS) service applications. In this project they
are combined together into a “CR based 5G”.

4. 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).

5. 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 using
today, with 2.5G having more
capabilities(

6. Systems (3G), also known as IMT-2000 (International
Third 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) or
UMTS (Universal Mobile telecommunications System).

7. 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

8. 5G Concept
The twenty-first century is surely the “century of speed”, and
achieves a high evolution in all the possible domains,
especially in communication . Therefore, a new technology
started to be delineated, that will provide all the possible
applications, by using only one universal device, and
interconnecting the already existing communication
infrastructures—that is the fifth generation of the mobile
communications standards—5G.
In 2009 proposed for the first time in the literature the
WISDOM concept, and gave an in point 5G definition:
4G & WISDOM ⇒ 5G

9. 5G TECHNOLOGY OVERVIEW
10x-100x
Connect
ed
Devices
2G 3G 4G 5G
•Expecte
d speed
up to 1
Gbps
Lower cost
than
previous
generation
s
10x Battery
Life for Low
Power
Devices
X10 faster
than 4G

10. Hardware & Software of 5G
 5G Software:
• 5G will be single unified
standard of different
wireless networks, including
LAN technologies,
LAN/WAN, WWWW- World
Wide Wireless Web, unified
IP
• Internet protocol version
6(IPv6)*.
• One unified global standard.
 5G Hardware:
• Uses UWB (Ultra Wide
Band) networks with higher
BW at low energy levels
• Uses smart antenna
• Uses CDMA (Code Division
Multiple Access)

11. CR Concept

12. CR Concept

13. CR Technology: Definition
CR technology is based on the fact that the licensed systems (also named
primary systems PS) are not always using their spectrum bands; CR brings
new radio types—cognitive radios—that should firstly, identify the existing
spectrum holes, and secondly, utilize them according to an access.

14. Spectrum Management Implications
By spectrum sensing: it is mainly understood the CRs
capability to detect the available channels, within the pre-existing
systems licensed bands.
• signal detection: does a signal exist on the sensed channel?
(In this step is no need to
know the type of the existing signal);
• signal classification: in the case when a signal exist, is the
signal a PUs signal? (the
signal type is usually determined by extracting the sensed
signal features);
• channel availability decision, based on some criterion or
rule: the channel is or not
available?

15. Increasing the Performance in 5G: CR
based 5G
It can be summarized that the 5G goal is to
integrate/inter-connect various types of
communication technologies, and the CR ability is
to self integrate into the wireless world
diversity.(Basically 5G integrates and
interconnects all the wireless technologies, and
CR adapts and works with all the wireless
technologies.) these features are 5G essential in
order to manage the complexity induced by a
variety of possible usage scenarios, on the one
hand, and to minimize the spectrum, on the
other hand

16. 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.

17. Reference
-ENERGY-EFFICIENT COGNITIVE RADIO ,Xuemin Hong, Jing Wang, Cheng-Xiang Wang, and Jianghong Shi ,Cognitive Radio in 5G: A
Perspective on Energy-Spectral Efficiency Trade-off, IEEE Communications Magazine • July 2014
-COGNITIVE RADIO RESOURCE MANAGEMENT FOR FUTURE CELLULAR NETWORKS, SHAO-YU LIEN, NATIONAL FORMOSA
UNIVERSITY KWANG-CHENG CHEN, NATIONAL TAIWAN UNIVERSITY
YING-CHANG LIANG, INSTITUTE FOR INFOCOMM RESEARCH (I2R) AND UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY
OF CHINA YONGHUA LIN, IBM RESEARCH DIVISION, IEEE Wireless Communications • February 2014
EMERGING TECHNOLOGIES AND RESEARCH
CHALLENGES FOR 5G WIRELESS NETWORKS, WOON HAU CHIN, ZHONG FAN, AND RUSSELL HAINES, IEEE Wireless
Communications • April 2014
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Cognitive Radio Ad-Hoc Networks
Minho Jo, Longzhe Han, Dohoon Kim, and Hoh Peter In, Korea University, IEEE Network • May/June 2013
- Cognitive Radio Networks, Adrian Popescu ,Dept. of Communications and Computer Systems,School of Computing,Blekinge
Institute of Technology,371 79 Karlskrona, Sweden
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Jianghong Shi, IEEE Communications Magazine • July 2014
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Technologies for 5G Wireless
Communication Networks, Cheng-Xiang Wang, Heriot-Watt University and University of Tabuk Fourat Haider, Heriot-Watt
University Xiqi Gao and Xiao-Hu You, Southeast University,Yang Yang, ShanghaiTech University Dongfeng Yuan, Shandong
University
Hadi M. Aggoune, University of Tabuk ,Harald Haas, University of Edinburgh ,Simon Fletcher, NEC Telecom MODUS Ltd.
Erol Hepsaydir, Hutchison 3G UK, IEEE Communications Magazine • February 2014
•

18. THANK YOU