scholarly journals Database-assisted end-to-end theoretical and simulation framework for cognitive radio networks

2014 ◽  
Author(s):  
Abdulla K. Al-Ali
Keyword(s):  
Cognitive Radio ◽  
Cognitive Radio Networks ◽  
Radio Networks ◽  
Simulation Framework ◽  
End To End

scholarly journals Efficient Channel Selection and Routing Algorithm for Multihop, Multichannel Cognitive Radio Networks with Energy Harvesting under Jamming Attacks

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Pham-Duy Thanh ◽  
Hiep Vu-Van ◽  
Insoo Koo
Keyword(s):  
Cognitive Radio ◽  
Energy Harvesting ◽  
Cognitive Radio Networks ◽  
Time Slot ◽  
Radio Networks ◽  
Switching Behavior ◽  
Jamming Attacks ◽  
Battery Capacity ◽  
Energy Constrained ◽  
End To End

We study jamming attacks in the physical layer of multihop cognitive radio networks (MHCRNs) where energy-constrained relays forward information from the source to the destination. Meanwhile, a jammer can transmit interfering signals on a channel such that all ongoing transmissions on this channel will be corrupted. In this paper, all jammers can attack only one of the predefined channels in each time slot. Moreover, they can randomly switch channels to start jamming another channel at the beginning of every time slot. The switching behavior is assumed to follow a Gaussian distribution. Due to limited battery capacity in the relays, energy harvesting is utilized to solve the energy-constrained problem in the cognitive radio network. Subsequently, relays are able to harvest energy from non-radio frequency (non-RF) signals such as solar, wind, or temperature. In this paper, we determine the throughput/delay ratio as a key metric to evaluate the performance in MHCRNs. Owing to the limited battery capacity in the relays and the jamming problem, the source needs to select proper relays and channels for each data transmission frame to optimize overall network performance in terms of end-to-end delay, throughput, and energy efficiency. Therefore, we provide two novel multihop allocation schemes to maximize achievable end-to-end throughput while minimizing delay in the presence of jammers. Through simulation results, we validate the effectiveness of the proposed schemes under multiple jamming attacks in MHCRNs.

Path-Permutation Codes for End-to-End Transmission in Ad Hoc Cognitive Radio Networks

2015 ◽  
Vol 14 (6) ◽  
pp. 3309-3321 ◽  
Author(s):  
I-Wei Lai ◽  
Chia-Han Lee ◽  
Kwang-Cheng Chen ◽  
Ezio Biglieri
Keyword(s):  
Cognitive Radio ◽  
Cognitive Radio Networks ◽  
Ad Hoc ◽  
Radio Networks ◽  
Permutation Codes ◽  
End To End

Simulation framework for security threats in cognitive radio networks

2012 ◽  
Vol 6 (8) ◽  
pp. 984 ◽  
Author(s):  
E. Romero ◽  
A. Mouradian ◽  
J. Blesa ◽  
J.M. Moya ◽  
A. Araujo
Keyword(s):  
Cognitive Radio ◽  
Cognitive Radio Networks ◽  
Radio Networks ◽  
Security Threats ◽  
Simulation Framework

CogNS: A Simulation Framework for Cognitive Radio Networks

2013 ◽  
Vol 72 (4) ◽  
pp. 2849-2865 ◽  
Author(s):  
Vahid Esmaeelzadeh ◽  
Reza Berangi ◽  
Seyyed Mohammad Sebt ◽  
Elahe Sadat Hosseini ◽  
Moein Parsinia
Keyword(s):  
Cognitive Radio ◽  
Cognitive Radio Networks ◽  
Radio Networks ◽  
Simulation Framework

AN ENERGY EFFICIENT SPECTRUM AWARE ROUTING FOR COGNITIVE RADIO NETWORKS

2019 ◽  
Vol 13 ◽  
Author(s):  
Dileep Reddy Bolla ◽  
Shivashankar
Keyword(s):  
Cognitive Radio ◽  
Spectrum Sensing ◽  
Cognitive Radio Networks ◽  
Energy Efficient ◽  
Multipath Fading ◽  
Spectrum Management ◽  
Radio Networks ◽  
Traffic Load ◽  
End To End Delay ◽  
End To End

Background: Now a days Due to rapid increase in the internet the Spectrum available is been overcrowded and thus the spectrum Sensing can be achieved by using the predominant technology i.e., Cognitive Radio as the spectrum is been under-utilized by the wireless communication technologies. Objective: The prime objective of the research work carried out is to achieve the energy efficiency and to use the spectrum effectively by using the spectrum management concept and achieve better throughput, end to end delay etc., Methods: The detection of the spectrum hole plays a vital role in the routing of the cognitive radio networks. As the hidden node problems and the multipath fading and the shadowing are considered to be impacting the sensing of the spectrum to overcome these issues Cooperative spectrum Sensing Mechanism is been adopted to sense the spectrum in an optimal manner and over cum the issues. Along with these issues the spectrum resources changes time to time in the routing. Result: An Energy Efficient Spectrum aware Routing (ESR) is been proposed which involves the timeslot and the routing schemes were been discussed. The simulation parameters have been proposed and the improvement in the performance of network through and a decrease in the end-to end delay have been observed and analyzed. Conclusion: An Energy Efficient spectrum management and the routing is successfully established to communication in the network and further traffic load is observed to be balanced in the protocol based on the residual energy in a node and further it prologs the Network Lifetime of the Overall Network and the Individual CR user. Further the end-to-end Delay has been observed to be lower which ensure higher throughput in the network and improves the network life time.

scholarly journals Improved Buffer-Aided Multi-Hop Relaying with Reduced Outage and Packet Delay in Cognitive Radio Networks

Electronics ◽  
2019 ◽  
Vol 8 (8) ◽  
pp. 895
Author(s):  
Shakeel Alvi ◽  
Riaz Hussain ◽  
Qadeer Hasan ◽  
Shahzad Malik
Keyword(s):  
Cognitive Radio ◽  
Outage Probability ◽  
Cognitive Radio Networks ◽  
Communication Systems ◽  
Performance Metrics ◽  
Packet Delay ◽  
Radio Spectrum ◽  
Radio Networks ◽  
Cooperative Relaying ◽  
End To End

Cognitive radio networks have emerged to exploit optimally the scarcely-available radio spectrum resources to enable evolving 5G wireless communication systems. These networks tend to cater to the ever-increasing demands of higher data rates, lower latencies and ubiquitous coverage. By using the buffer-aided cooperative relaying, a cognitive radio network can enhance both the spectral efficiency and the range of the network; although, this could incur additional end-to-end delays. To mitigate this possible limitation of the buffer-aided relaying in the underlay cognitive network, a virtual duplex multi-hop scheme, referred as buffer-aided multi-hop relaying, is proposed, which improves throughput and reduces end-to-end delays while keeping the outage probability to a minimum as well. This scheme simultaneously takes into account the inter-relay interference and the interference to the primary network. The proposed scheme is modeled as a Markov chain, and Monte Carlo simulations under various scenarios are conducted to evaluate several key performance metrics such as throughput, outage probability, and average packet delay. The results show that the proposed scheme outperforms many non-buffer-aided relaying schemes in terms of outage performance. When compared with other buffer-aided relaying schemes such as max-max, max-link, and buffer-aided relay selection with reduced packet delay, the proposed scheme demonstrated better interference mitigation without compromising the delay performance as well.

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