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Transmission protocols in Cognitive Radio Mesh Networks
2015
International Journal of Electrical and Computer Engineering (IJECE)
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Cognitive Radio Network (CRN) is made up of both the licensed users and unlicensed users with CR enable and disabled radios. ...
In CRN'S most of the research was done on spectrum allocation, spectrum sensing and spectrum sharing. In this literature, we present various Medium Access (MAC) protocols of CRN'S. ...
(Anusha M) Opportunistic spectrum white space access by unlicensed user
Figure 2 . 2 CRN architecture of both licensed network and unlicensed network [21]
. 2 . 2 Time Division MAC ProtocolsIn [ ...
doi:10.11591/ijece.v5i6.pp1446-1451
fatcat:6kp5nste3vbjxpznb342lvjjym
A Novel Opportunistic Spectrum Sharing Scheme for Cognitive Ad Hoc Networks
2010
Electronic Communications of the EASST
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In this paper, a novel opportunistic spectrum sharing scheme under a heterogeneous spectrum environment of licensed and unlicensed bands is introduced. ...
Based on CR, the unlicensed (secondary) users will utilize the unused spectrum of the licensed (primary) users in an opportunistic manner. As a result, the average spectrum usage will be increased. ...
Spectrum sharing in CR networks can be regarded to be similar to multi-channel medium access control in existing wireless systems with some modification. ...
doi:10.14279/tuj.eceasst.17.198
dblp:journals/eceasst/KalilLVM09
fatcat:kpeyhf75jrhwvaqbr7gh5peegq
Spectrum handoff reduction for cognitive radio ad hoc networks
2010
2010 7th International Symposium on Wireless Communication Systems
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Opportunistic Spectrum Access with Backup channels (OSAB) is a new spectrum access concept for managing and increasing the spectrum capacity for ad hoc networks. ...
By applying cognitive radio technology, the ad hoc devices will utilize the unused spectrum of the existing legacy systems in an opportunistic manner in addition to using the unlicensed spectrum. ...
Based on CR, the unlicensed users will utilize the unused spectrum of the licensed users in an opportunistic manner. Therefore, the average spectrum usage will be increased. ...
doi:10.1109/iswcs.2010.5624253
dblp:conf/iswcs/KalilAM10
fatcat:aqtpggu72vbyhcygbuudsenz7u
A survey on spectrum management in cognitive radio networks
2008
IEEE Communications Magazine
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• CR networks : Licensed band operation
Unlicensed band operation
• Licensed band
• Unlicensed band
CR have the same access rights
• CR network access: Access their own CR base
station on both ...
both licensed and unlicensed spectrum bands • Primary Network access: CR users access the primary base station through the licensed band -require adaptive MAC protocol Interference Avoidance QoS Awareness ...
May result in reduced spectrum utilization Cooperative approaches outperform and result to a certain degree of fairness Non-cooperative perform better at energy consumption ...
doi:10.1109/mcom.2008.4481339
fatcat:vn7xlwkcdbedplmkmrdxyaogra
Analysis of spectrum allocation of secondary users based on linear cooperative spectrum sensing techniques in cognitive radio networks
2021
Trends in Computer Science and Information Technology
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Citation: Omariba ZB (2021) Analysis of spectrum allocation of secondary users based on linear cooperative spectrum sensing techniques in cognitive radio networks. ...
The SUs are not licensed to operate in the predefi ned bands, thus SUs achieve spectrum access in an opportunistic manner and can only utilize the unutilized spectrum [9] . ...
the access and decision of the best channels, and spectrum mobility involves the switching to target channel when a licensed user appears. ...
doi:10.17352/tcsit.000035
fatcat:bqufnygfhjfkdlfxu4xhnrtaam
FSMA - A Topology-Transparent Scheme for Opportunistic Spectrum Access
2007
2007 IEEE 65th Vehicular Technology Conference - VTC2007-Spring
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We propose a frequency-spread multiple access (FSMA) scheme that is topology-transparent, and numerical results suggest that it is suited for opportunistic spectrum access in a sparsely-connected, low-density ...
With the advent of cognitive radio technology, new paradigms for spectrum access can achieve near-optimal spectrum utilization by letting users sense and utilize available spectrum opportunistically. ...
While licensed users have priority in spectrum access, unlicensed users can use available spectrum without interfering with licensed users through opportunistic access (overlay) or low power spread-spectrum ...
doi:10.1109/vetecs.2007.593
dblp:conf/vtc/TanOD07
fatcat:sztuulc6abfyfgljk6xvlbqkme
Improvement of Spectrum Sharing using Traffic pattern prediction
[article]
2014
arXiv
pre-print
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utilization and avoids the spectrum scarcity. ...
The paper focuses on improving the spectrum sharing using NSU, FLS and Traffic Pattern Prediction and also made comparison that traffic pattern prediction provides a better way of improving the spectrum ...
Spectrum Sharing The spectrum access and sharing among licensed and unlicensed users is regulated in a way that the unlicensed or secondary user accesses the spectrum. ...
arXiv:1410.2360v1
fatcat:skip6z446fazpm76ku3hf6tkty
THE ISSUES AND CHALLENGES IN FUTURISTIC DEVELOPMENT OF COGNITIVE RADIO NETWORKS
2017
International Journal of Advanced Research in Computer Science
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The opportunistic use of the accessible channels in the wireless environment requires dynamic channel assignment to efficiently utilize the available resources while minimizing the interference in the ...
The cognitive radio is an emerging technology that enables dynamic spectrum access in wireless networks. ...
In comparison with interference-free CR networks, interference-tolerant CR networks can attain enhanced spectrum utilization by opportunistically sharing the radio spectrum resources with licensed users ...
doi:10.26483/ijarcs.v8i7.4004
fatcat:p36fx5gs3zfqvhmq4mwzkbhw6a
A survey of cognitive radio technologies and their optimization approaches
2013
2013 8th International Conference on Communications and Networking in China (CHINACOM)
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Although Cognitive radio (CR) is regarded as a promising technology to provide high bandwidth to mobile users via heterogeneous wireless network architectures and dynamic spectrum access techniques, cognitive ...
In this paper, fundamentals of CR, including spectrum sensing, spectrum management, spectrum mobility and spectrum sharing, are surveyed, with their paradigms of self-organization being emphasized. ...
In overlay spectrum sharing, CR users access the network using a portion of the spectrum that has not been used by licensed users. ...
doi:10.1109/chinacom.2013.6694736
fatcat:btl6do2wjfay7gzb5k7vuh5h4m
A Multi-Agent Collaborative Model for Bayesian Opportunistic Channel Accessibility in Railway Cognitive Radio
2017
International Journal of Performability Engineering
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Many researchers have greatly contributed to addressing this issue in railway Cognitive Radio (rail-CR), such as spectrum sensing, management technique, licensed user activity prediction, and so on [5, ...
Section 2 presents a formulation of our problem in detail, in which a mathematic model for the channel opportunistic access is given. ...
Licensed user activity: When an unlicensed user and a licensed user have a collision while using the same channel in a CR network, the spectrum shared by the unlicensed user would seriously affect the ...
doi:10.23940/ijpe.17.04.p15.479489
fatcat:fzsx4cepazeljozx4dwimhv5lu
Hybrid Common Control Channel Based MAC Protocol for Cognitive Radio Ad-Hoc Networks
2014
International Journal of Information and Electronics Engineering
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Moreover, multi-channel hidden terminal problem and node synchronization cannot be effectively resolved due to link based (sequence) and group based CCC design in opportunistic licensed spectrum bands. ...
With out-of-band CCC, network setup with dedicated licensed or unlicensed channel is relatively fast compared with In-band technique. ...
One way to enhance the spectrum utilization is by allowing heterogeneous unlicensed radio services in the licensed spectrum band through dynamic spectrum access (DSA) and opportunistic routing. ...
doi:10.7763/ijiee.2014.v4.437
fatcat:j2qebocmnnaljidu42rsnie2my
Performance Evaluation Cognitive Medium Access Control Protocols
2020
Zenodo
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Simulation results prove that common control multi channels cognitive medium access control protocol outperforms non common control multi channels cognitive medium access control protocol in all aspects ...
Finally, we evaluate the performance of two systems for medium access control protocols common control multi channels cognitive medium access control protocol and non common control multi channels cognitive ...
Control channel in licensed band or unlicensed band Common control channels (CCC) may be in licensed band, in unlicensed bans, or construct in both. ...
doi:10.5281/zenodo.3842953
fatcat:lapjktx7yraybcc6fky7uahn4a
Impact of Cognitive Radio on Future Management of Spectrum
[article]
2009
arXiv
pre-print
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Both a near-term view involving the opportunistic spectrum access model and a longer-term view involving a self-regulating dynamic spectrum access model within a society of cognitive radios are discussed ...
Cognitive radio is a breakthrough technology which is expected to have a profound impact on the way radio spectrum will be accessed, managed and shared in the future. ...
Acknowledgements The views expressed in this paper are those of the author and do not necessarily reflect those of BT. ...
arXiv:0903.0276v1
fatcat:ssffihk7bndurc7ln2pdzyjhe4
Impact of Cognitive Radio on Future Management of Spectrum
2008
2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008)
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Both a near-term view involving the opportunistic spectrum access model and a longer-term view involving a self-regulating dynamic spectrum access model within a society of cognitive radios are discussed ...
Cognitive radio is a breakthrough technology which is expected to have a profound impact on the way radio spectrum will be accessed, managed and shared in the future. ...
ACKNOWLEDGEMENTS The views expressed in this paper are those of the author and do not necessarily reflect those of BT. ...
doi:10.1109/crowncom.2008.4562455
dblp:conf/crowncom/Nekovee08
fatcat:ovvsez6ccbfibiwlzbb43t7ubm
Application of Game Theory to Cognitive Radio Networks for Power Allocation: An Overview
2015
International Journal of Hybrid Information Technology
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CR technology senses spectrum, selects best available channel, access channel and then also vacates channel if any PU activity is detected. ...
A CR has a cognitive process that can perceive current network and environmental conditions, and then plan, decide and act on those conditions. ...
Based on this sensed information, CR users access these white holes opportunistically and vacate the channel immediately upon any primary user activity detection. ...
doi:10.14257/ijhit.2015.8.5.27
fatcat:vxvpo7iv6fgqvikpnc5cxwmrd4
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