PAD-MAC: Primary User Activity-Aware Distributed MAC for Multi-Channel Cognitive Radio Networks

Ali, Amjad; Piran, Mohammad Jalil; Kim, Han‐Soo; Yun, Jihyeok; Suh, Doug Young

doi:10.3390/s150407658

Cited by 13 publications

(12 citation statements)

References 42 publications

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“…Thus, selecting a channel based on Ch Rank provides the minimum channel switching rates as well as the opportunity to make known switching decisions. Ch Rank is calculated as follows [29]:…”

Section: B Parameters Selectionmentioning

confidence: 99%

Hybrid Fuzzy Logic Scheme for Efficient Channel Utilization in Cognitive Radio Networks

et al. 2019

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The proliferation of mobile devices and the heterogeneous environment of wireless communications have increased the need for additional spectrum for data transmission. It is not possible to altogether allocate a new band to all networks, which is why fully efficient use of the already available spectrum is the demand of the day. Cognitive radio (CR) technology is a promising solution for efficient spectrum utilization, where CR devices, or secondary users (SUs), can opportunistically exploit white spaces available in the licensed channels. SUs have to immediately vacate the licensed channel and switch to another available channel when they detect the arrival of the incumbent primary user. However, performance for the SU severely degrades if successive channel switching happens. Moreover, taking the channel-switching decisions based on crisp logic is not a suitable approach in the brain-empowered CR networks (CRNs) where sensing information is not only imprecise and inaccurate but also involves a major uncertainty factor. In this paper, we propose a fuzzy logic-based decision support system (FLB-DSS) that jointly deals with channel selection and channel switching to enhance the overall throughput of CRNs. The proposed scheme reduces the SU channel switching rate and makes channel selection more adaptable. The performance of the proposed scheme is evaluated using a Matlab simulator, and a comprehensive comparison study with a baseline scheme is presented. The simulation results are promising in terms of the throughput and the number of handoffs and making our proposed FLB-DSS a good candidate mechanism for SUs while making judicious decisions in the CR environment. INDEX TERMS Cognitive radio network, fuzzy logic, resource allocation, channel selection, handoff rate.

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Section: B Parameters Selectionmentioning

confidence: 99%

Hybrid Fuzzy Logic Scheme for Efficient Channel Utilization in Cognitive Radio Networks

et al. 2019

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“…22 working group has been standardized MAC protocol for wireless regional area networks and that is allocated TV services. For a decade ago the concept of CR was introduced and the MAC design in CRWMN is an open research problem.…”

Section: Related Workmentioning

confidence: 99%

“…The IEEE 802. 22 working group has been standardized MAC protocol for wireless regional area networks and that is allocated TV services. 7 The architecture of the IEEE 802.22 is centralized, while ATMAC is designed for distributed environment.…”

Section: Related Workmentioning

confidence: 99%

“…21 In this paper, they have proposed a scheme called overheard ACK where explicit ACK frame has been removed using packet overhearing mechanism. In Ali et al, 22 2-state Markov chain model is used to identify the PU activity identification scheme. Moreover, they estimated the future idle slots using the previous observations of the channel.…”

Section: Related Workmentioning

confidence: 99%

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ATMAC: adaptive token‐based medium access control protocol for cognitive radio wireless mesh network

Battula

Gaur

Gopalani

2016

Int J Communication

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In next generation wireless communication, cognitive radio technology facilitates to utilize underutilized licensed frequency bands that help to enhance the spectrum utilization. Cognitive radio wireless mesh network (CRWMN) is a promising and reliable technology to experience high throughput with low cost. Existing IEEE 802.11 based medium access control (MAC) protocols offer high data rates with decreasing efficiency at the MAC layer. Hence, most of the researchers applied aggregation mechanisms to provide the solution to bandwidth craving applications. In CRWMN, MAC design is significant because stability, efficient resource utilization, and scalability are predominating problems; however, the specified MAC issues are not yet resolved. The proposed MAC is novel, which aims to ensure reliability and scalability for CRWMN. The common control channel is used to exchange handshaking frames between the transmitter and receiver. It helps us to schedule the data transmission as well as reserve the channel in a discrete time interval. It introduces a token-based channel accessing mechanism with resource-aware channel assignment, which resolves the problems of efficiency and stability. The proposed MAC simulated using the network simulator (ns-2), and the simulation results demonstrate that the proposed protocol improved the performance compared with the existing protocols.

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“…A simple approach that is widely adopted in the literature for rendezvous is the common control channel (CCC), e.g., [4,5,6,7,8,9]. In this approach, one channel which assumed to be globally available for all SUs is dedicated for exchanging control messages.…”

Section: Introductionmentioning

confidence: 99%

Efficient Matrix-Based Channel Hopping Schemes for Blind Rendezvous in Distributed Cognitive Radio Networks

Al-Mqdashi

Sali

Noordin

et al. 2018

Sensors

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Channel rendezvous is an initial and important process for establishing communications between secondary users (SUs) in distributed cognitive radio networks. Due to the drawbacks of the common control channel (CCC) based rendezvous approach, channel hopping (CH) has attracted a lot of research interests for achieving blind rendezvous. To ensure rendezvous within a finite time, most of the existing CH-based rendezvous schemes generate their CH sequences based on the whole global channel set in the network. However, due to the spatial and temporal variations in channel availabilities as well as the limitation of SUs sensing capabilities, the local available channel set (ACS) for each SU is usually a small subset of the global set. Therefore, following these global-based generated CH sequences can result in extensively long time-to-rendezvous (TTR) especially when the number of unavailable channels is large. In this paper, we propose two matrix-based CH rendezvous schemes in which the CH sequences are generated based on the ACSs only. We prove the guaranteed and full diversity rendezvous of the proposed schemes by deriving the theoretical upper bounds of their maximum TTRs. Furthermore, extensive simulation comparisons with other existing works are conducted which illustrate the superior performance of our schemes in terms of the TTR metrics.

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PAD-MAC: Primary User Activity-Aware Distributed MAC for Multi-Channel Cognitive Radio Networks

Cited by 13 publications

References 42 publications

Hybrid Fuzzy Logic Scheme for Efficient Channel Utilization in Cognitive Radio Networks

Hybrid Fuzzy Logic Scheme for Efficient Channel Utilization in Cognitive Radio Networks

ATMAC: adaptive token‐based medium access control protocol for cognitive radio wireless mesh network

Efficient Matrix-Based Channel Hopping Schemes for Blind Rendezvous in Distributed Cognitive Radio Networks

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