OS-MAC: An Efficient MAC Protocol for Spectrum-Agile Wireless Networks

Hamdaoui, Bechir; Shin, Kang G.

doi:10.1109/tmc.2007.70758

Cited by 187 publications

(84 citation statements)

References 17 publications

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“…Control signals are synchronized amongst nodes in complex self-organizing CR network through time slots, and actual data transmission occurs following the random channel access mechanism. The OS-MAC protocol for cognitive wireless networks (Hamdaoui and Shin 2008) devotes one channel as a CCC, where inter-channel control traffic takes place. In OS-MAC, devices are needed to be equipped with a half-duplex transceiver only.…”

Section: Hybrid Access Macmentioning

confidence: 99%

A survey on MAC protocols for complex self-organizing cognitive radio networks

Shah

Zhang

Kamran

et al. 2016

Complex Adapt Syst Model

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Complex self-organizing cognitive radio (CR) networks serve as a framework for accessing the spectrum allocation dynamically where the vacant channels can be used by CR nodes opportunistically. CR devices must be capable of exploiting spectrum opportunities and exchanging control information over a control channel. Moreover, CR nodes should intelligently coordinate their access between different cognitive radios to avoid collisions on the available spectrum channels and to vacate the channel for the licensed user in timely manner. Since inception of CR technology, several MAC protocols have been designed and developed. This paper surveys the state of the art on tools, technologies and taxonomy of complex self-organizing CR networks. A detailed analysis on CR MAC protocols form part of this paper. We group existing approaches for development of CR MAC protocols and classify them into different categories and provide performance analysis and comparison of different protocols. With our categorization, an easy and concise view of underlying models for development of a CR MAC protocol is provided.

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Section: Hybrid Access Macmentioning

confidence: 99%

A survey on MAC protocols for complex self-organizing cognitive radio networks

Shah

Zhang

Kamran

et al. 2016

Complex Adapt Syst Model

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“…The SU coordination is performed by a CR MAC protocol such as C-MAC [19] and OS-MAC [20], which is beyond the scope of this paper. Using the proposed sensing sequence in Section 5, the controller can assign as many SUs/sensors as necessary to achieve the PU protection requirements (e.g., PMD and PFA).…”

Section: Network Modelmentioning

confidence: 99%

Optimal Online Sensing Sequence in Multichannel Cognitive Radio Networks

Kim

Shin

2013

IEEE Trans. on Mobile Comput.

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Abstract-We address the problem of rapidly discovering spectrum opportunities for seamless service provisioning in cognitive radio networks (CRNs). In particular, we focus on multichannel communications via channel-bonding with heterogeneous channel characteristics of ON/OFF patterns, sensing time, and channel capacity. Using dynamic programming (DP), we derive an optimal online sensing sequence incurring a minimal opportunity-discovery delay, and propose a suboptimal sequence that presents a nearoptimal performance while incurring significantly less computational overhead than the DP algorithm. To facilitate fast opportunity discovery, we also propose a channel-management strategy that maintains a list of backup channels to be used at building the optimal sequence. A hybrid of maximum likelihood (ML) and Bayesian inference is introduced as well for flexible estimation of ON/OFF channel-usage patterns, which selectively chooses the better between the two according to the frequency of sensing and ON/OFF durations. The performance of the proposed schemes, in terms of the opportunity-discovery delay, is evaluated via in-depth simulation, and for the scenarios we considered, the proposed suboptimal sequence achieves a near-optimal performance with only an average of 0.5 percent difference from the optimal delay, and outperforms the previously proposed probabilistic scheme by up to 50.1 percent. In addition, the backup channel update scheme outperforms the no-update case by up to 49.9 percent.

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“…In the cross-layer opportunistic MAC [12], the spectrum sensing policy at the physical layer and the packet scheduling at the MAC layer are integrated. OS MAC [13] is based on a group of nodes (SU group) using the same data channel.…”

Section: D-cccmentioning

confidence: 99%

A concurrent access MAC protocol for cognitive radio ad hoc networks without common control channel

Timalsina

Moh

Chung

et al. 2013

EURASIP J. Adv. Signal Process.

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Cognitive radio ad hoc networks (CRAHNs) consist of autonomous nodes that operate in ad hoc mode and aim at efficient utilization of spectrum resources. Usually, the cognitive nodes in a CRAHN exploit a number of available channels, but these channels are not necessarily common to all nodes. Such a network environment poses the problem of establishing a common control channel (CCC) as there might be no channel common to all the network members at all. In designing protocols, therefore, it is highly desirable to consider the network environment with no CCC. In this article, we propose a MAC protocol called concurrent access MAC (CA-MAC) that operates in the network environment with no CCC. The two devices in a communication pair can communicate with each other even if they have only one common channel available. Therefore, the problems with CCC (such as channel saturation and denial of service attacks) can also be resolved. In CA-MAC, channel accesses are distributed over communication pairs, resulting in increased network connectivity. In addition, CA-MAC allows different communication pairs to access multiple channels concurrently. According to our performance study, CA-MAC provides higher network connectivity with shorter channel access delay compared to SYN-MAC, which is the conventional key MAC protocol for the network environment with no CCC, resulting in better network throughput.

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OS-MAC: An Efficient MAC Protocol for Spectrum-Agile Wireless Networks

Cited by 187 publications

References 17 publications

A survey on MAC protocols for complex self-organizing cognitive radio networks

A survey on MAC protocols for complex self-organizing cognitive radio networks

Optimal Online Sensing Sequence in Multichannel Cognitive Radio Networks

A concurrent access MAC protocol for cognitive radio ad hoc networks without common control channel

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