A Throughput-Aimed MAC Protocol with QoS Provision for Cognitive Ad Hoc Networks

Wang, Yichen; Ren, Pinyi; Wu, Guangen

doi:10.1587/transcom.e93.b.1426

Cited by 24 publications

(29 citation statements)

References 6 publications

(4 reference statements)

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“…Through exploitation of channel reciprocity, other potential transmitters are prevented from interfering by first listening to the busy signal. [13], proposed a novel slotted DSA protocol named T-MAC protocol. In the work, the super frame structure of T-MAC consists of one reservation frame, K information frames and one acknowledgment frame.…”

Section: Over View Of Mac Protocols For Cognitive Radio Systemsmentioning

confidence: 99%

Performance Analysis of Hybrid MAC Protocol for Cognitive Radio Networks

Фарук¹,

Gumel²,

Oloyode³

et al. 2013

IJCNS

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The rapid growth in demand for broadband wireless services coupled with the recent developmental work on wireless communications technology and the static allocation of the spectrum have led to the artificial scarcity of the radio spectrum. The traditional command and control model (Static allocation) of spectrum allocation policy allows for severe spectrum underutilization. Spectrum allocated to TV operators can potentially be shared by wireless data services, either when the primary service is switched off or by exploiting spatial reuse opportunities. This paper describes a hybrid access scheme based on CSMA/CA and TDMA MAC protocols for use in the TV bands. The approach allows secondary users (SU) to operate in the presence of the primary users (PU) and the OPNET simulation and modelling software has been used to model the performance of the scheme. An analysis of the results shows that, the proposed schemes protect the primary user from harmful Interference from the secondary user. In terms of delay, it was found that packet arrival rates, data rates and the number of secondary users have significant effects on delay.

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Section: Over View Of Mac Protocols For Cognitive Radio Systemsmentioning

confidence: 99%

Performance Analysis of Hybrid MAC Protocol for Cognitive Radio Networks

Фарук¹,

Gumel²,

Oloyode³

et al. 2013

IJCNS

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“…Therefore, the power control mechanism is a critically important component for the spectrum access protocols. Although some distributed DSA protocols with power control mechanism have been proposed, such as [40][41][42][43][44], etc., designing efficient power control mechanism is still a complex and challenging task for distributed CWNs. First, compared with traditional distributed wireless networks, not only the interferences among different SUs should be considered, but also the interference constraints imposed by PUs should be taken into consideration in the distributed CWNs.…”

Section: Power Control Mechanismmentioning

confidence: 99%

“…It is clear that the multi-channel hidden terminal problem is harmful for the network performances. The multi-channel hidden terminal problem can be solved by using a control radio to operate on the CCC [20][21][22]40], but additional costs will be caused. Moreover, the multichannel hidden terminal problem is not well solved in the distributed CWNs without using the dedicated CCC [27,46].…”

Section: Multi-channel Hidden and Exposed Terminal Problemsmentioning

confidence: 99%

“…The multi-channel exposed terminal problem is another critical issue in the distributed CWNs, but has been neither well understood nor comprehensively studied [40]. So-called multi-channel exposed terminal problem is that, when one sending node discovers its neighbor nodes are sending data packets in some data channels through carrier sense, the sending node will give up choosing those channels for transmission.…”

Section: Multi-channel Hidden and Exposed Terminal Problemsmentioning

confidence: 99%

“…In overlay protocols, SUs can only access the spectrum that are not currently occupied by PUs, which causes that spectrum sensing is specially important [21,22,24,26,35,40,50]. In the underlay protocols, SUs are allow to share the spectrums that are occupying by PUs, only need to subject to the pre-defined maximal transmit power, i.e., power mask [41,44].…”

Section: Spectrum Sharing Mode Based Classificationmentioning

confidence: 99%

See 2 more Smart Citations

A survey on dynamic spectrum access protocols for distributed cognitive wireless networks

Ren

Wang

et al. 2012

J Wireless Com Network

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With the rapid development of wireless communications technologies, radio spectrum has become a type of extremely scarce resources in meeting the increasing demands for broadband wireless services. However, the traditional static spectrum allocation policy leads to severe spectrum underutilization and spectrum shortage problems. The cognitive radio (CR) technology can detect the occupancy of the spectrum and enable the dynamic spectrum access (DSA) to fill the spectrum hole caused by the static allocation policy, and thus has been widely recognized as an efficient approach to solve the above problems. The distributed cognitive wireless network (CWN), which does not have central entities, is one of the major networking architectures applying the CR technology. Correspondingly, the design of DSA in distributed CWNs is crucial, yet challenging, to increasing the utilization efficiency of the wireless spectrum with dynamically-varying occupancy statuses. In this article, we present a survey on DSA protocols for distributed CWNs. In particular, we first address the challenges in the design and implementation of distributed DSA protocols. Then, we categorize the existing distributed DSA protocols based on different criteria, such as spectrum sharing modes, spectrum allocation behaviors, spectrum access modes, the usage of common control channel, spectrum usage strategies, the number of radios, and spectrum sensing techniques. We also discuss the advantages and disadvantages of each category under diverse classification criterion. Moreover, we make a comprehensive survey of the state-of-the-art distributed DSA protocols using different spectrum access modes, which can be categorized into contention-based, time-slotted, and hybrid protocols. Through the study, we find out that most of distributed DSA protocols fall into the contention-based and hybrid protocols. In addition, the ongoing standardization efforts are also reviewed. Finally, several open research issues for the distributed DSA protocols are presented, such as spectrum handoff based protocols, spectrum prediction based protocols, adaptation of the spectrum-sharing modes, protocols with cooperative spectrum sensing, as well as distributed collision avoidance mechanisms.

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An analytical performance model considering access strategy of an opportunistic spectrum sharing system

Tang

Han

et al. 2011

Concurrency and Computation

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SUMMARY In an opportunistic spectrum sharing system, secondary users (SUs) opportunistically access the white space spectrum that is not occupied by the primary user (PU). Some analytical performance models have been available based on Markov chain modeling. In these models, SUs and PUs access the spectrum by randomly selecting the available channels with equal probability. However, how SUs and PUs use the spectrum are controlled by the access strategy designed in their MAC layer in an ad‐hoc network or centralized radio resource management layer in an infrastructure‐based network. To analyze the grade of service (GoS) of the secondary system under consideration for the access strategy, we propose an access rule transition matrix to model the access behavior of radio resource management, and apply it into the continuous‐time Markov chain model. It was proved that the proposed model is equivalent to the original models assuming the random access strategy by simulation. Moreover, we analyzed the GoS performance of the secondary system by assuming an ordered hunt access strategy. The results showed that the GoS performance of secondary systems can be improved greatly if it knows the spectrum access strategy of the primary system. Copyright © 2011 John Wiley & Sons, Ltd.

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A Throughput-Aimed MAC Protocol with QoS Provision for Cognitive Ad Hoc Networks

Cited by 24 publications

References 6 publications

Performance Analysis of Hybrid MAC Protocol for Cognitive Radio Networks

Performance Analysis of Hybrid MAC Protocol for Cognitive Radio Networks

A survey on dynamic spectrum access protocols for distributed cognitive wireless networks

An analytical performance model considering access strategy of an opportunistic spectrum sharing system

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