Protection and fairness oriented cognitive radio MAC protocol for ad hoc networks (PROFCR)

Kahraman, Beycan; Buzluca, Feza

doi:10.1109/ew.2010.5483429

Cited by 6 publications

(5 citation statements)

References 13 publications

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“…For the convenience of calculating ( ) A t , we use Laplace and inverse Laplace transitions to solve (2) in Section IV. While with the aid of l'Hospitale law and Bettol Theorem, we can get the stable value of ( )…”

Section: T T ≥mentioning

confidence: 99%

“…However, the resource assignment of PS should not actually be regulated because of the request of SUs. [2] lets SUs trying to use one SH as long as possible to decrease the frequency of spectrum handover. The scheme omits spectrum sensing which brings a high risk of interfering with PUs.…”

Section: Introductionmentioning

confidence: 99%

“…Researches on spectrum handover assume that wireless resources are divided in time domain, either by fixed length time slot [1] or by the marks of "currently released/used by Primary Users (PUs) " [2][3][4]. The basic idea of time domain solutions is to lower the probability that the reappearance of PUs happens when SUs reuse the SH.…”

Section: Introductionmentioning

confidence: 99%

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Anticipated spectrum handover in cognitive radios

Wang

et al. 2011

2011 18th International Conference on Telecommunications

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Spectrum handover becomes one of the hot topics of Cognitive Radio recently. Spectrum handover happens when the primary users and secondary users collide on the same spectrum hole, and the secondary users need to switch to other spectrum holes to continue the communication. Therefore, the reliability of spectrum Q-learning handover, which is reflected by the quality of service of secondary users and the reduction of interference of primary users, needs deeper research. This paper proposes the scheme of Anticipated Spectrum Handover Scheme (ASHS), which models the primary channel with the consideration of the activity of secondary users based on renewal theory. Secondary users would anticipate the trigger of spectrum handover and select proper spectrum hole as the target one according to the anticipation. The simulation results show that the drop ratio of secondary users is decreased and the frequency of spectrum handovers and passive handovers are decreased.

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Section: T T ≥mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Anticipated spectrum handover in cognitive radios

Wang

et al. 2011

2011 18th International Conference on Telecommunications

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“…Recent research efforts choose slot length from the range between 1 and 200 ms . In , the authors found that the optimal slot size for time division multiple access systems is between 10 and 20 ms.…”

Section: System Model and Basic Conceptsmentioning

confidence: 99%

An efficient and adaptive channel handover procedure for cognitive radio networks

Kahraman

Buzluca

2013

Wirel. Commun. Mob. Comput.

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In designing cognitive radio systems, one of the most critical issues is handling the channel handover process (CHP). The CHP consists of spectrum sensing, spectrum decision, negotiation on the common control channel, and adjustment of frequency and modulation settings, and such, it can be a time-consuming process. Consequently, initiating the CHP after each detected user activity (UA) can decrease the aggregate spectrum utilization. To alleviate this problem, we introduce a novel handover strategy to find the optimal trade-off between the durations of the CHP and UAs. With the use this model, secondary users (SUs) track only local information on their current data channel to make the decision to initiate the CHP or to wait for the termination of the ongoing UA. The system adapts to the dynamic conditions of the data channels and reduces the frequency of handovers to increase throughput and decrease access delay. We give analytical utilization bounds for SUs and also compare the performance of our model to those of other channel handover strategies by using extensive simulations. Our results for channels with heterogeneous loads and dynamic environments show that this model can clearly decrease the frequency of handover and consequently increase the aggregate SU utilization.

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“…In distributed cooperative systems, CCC is established between both the sender and the receiver for establishing a handshaking protocol [14,54,80,82,84,[90][91]. In addition, CCC can be used to communicate with a base station through an existing centralised entity system [92].…”

Section: C) Dynamic Local CCCmentioning

confidence: 99%

Spectrum Sharing Security and Attacks in CRNs: a Review

Alhakami¹,

Mansour²,

Safdar³

2014

IJACSA

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Abstract-Cognitive Radio plays a major part in communication technology by resolving the shortage of the spectrum through usage of dynamic spectrum access and artificial intelligence characteristics. The element of spectrum sharing in cognitive radio is a fundamental approach in utilising free channels. Cooperatively communicating cognitive radio devices use the common control channel of the cognitive radio medium access control to achieve spectrum sharing. Thus, the common control channel and consequently spectrum sharing security are vital to ensuring security in the subsequent data communication among cognitive radio nodes. In addition to well known security problems in wireless networks, cognitive radio networks introduce new classes of security threats and challenges, such as licensed user emulation attacks in spectrum sensing and misbehaviours in the common control channel transactions, which degrade the overall network operation and performance. This review paper briefly presents the known threats and attacks in wireless networks before it looks into the concept of cognitive radio and its main functionality. The paper then mainly focuses on spectrum sharing security and its related challenges. Since spectrum sharing is enabled through usage of the common control channel, more attention is paid to the security of the common control channel by looking into its security threats as well as protection and detection mechanisms. Finally, the pros and cons as well as the comparisons of different CR-specific security mechanisms are presented with some open research issues and challenges.

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Protection and fairness oriented cognitive radio MAC protocol for ad hoc networks (PROFCR)

Cited by 6 publications

References 13 publications

Anticipated spectrum handover in cognitive radios

Anticipated spectrum handover in cognitive radios

An efficient and adaptive channel handover procedure for cognitive radio networks

Spectrum Sharing Security and Attacks in CRNs: a Review

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