An overview of cognitive radio in 5G wireless communications

Sasipriya, S.; Vigneshram, R.

doi:10.1109/iccic.2016.7919725

Cited by 49 publications

(21 citation statements)

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“…The spectrum should be efficiently utilized in 5G networks since the 5G network supports higher data rate with minimal delay. The cognitive radio is a technology that paves the way for efficient utilization of spectrum by allowing unlicensed users to access the licensed spectrum. The licensed users are termed as primary users (PU) and the unlicensed users are termed as secondary users (SU).…”

Section: Introductionmentioning

confidence: 99%

Dynamic handover algorithm with interference cancellation in 5G networks for emergency communication

Kiruthika¹,

Sumathy²

2019

Int J Communication

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The integration of 5G networks with cognitive radio (CR) technology enables the software-defined networking (SDN) infrastructure to support emergency applications. In future, CR can be integrated with 5G and many wireless networks like Wi-Fi, WSN, and MANET for efficient spectrum utilization with higher data rate and lower latency. This CR technology allows unlicensed users to access the licensed spectrum, whenever it is free. In this paper, an efficient SDN architecture with cognitive ability for emergency network is proposed in which the SDN controller prolong communication between disaster victims and first responders and so the first responders can arrive at the spot directly and rescue the victims. The SDN controller has cognitive ability so that the victims can utilize the vacant licensed band to communicate with the first responders, thereby improving the spectrum utilization of the network.Another two main challenges during emergency are the occurrence of interference and link failure. The proposed dynamic handover algorithm with interference cancellation (DHAIC) cancels the interference between the nodes inside the network and performs dynamic handoff, whenever link failure occurs between the cluster head (CH) and the controller. An optimum throughput and minimal delay is achieved to ensure the network performance. KEYWORDScognitive radio (CR), emergency communication networks (ECN), interference cancellation, mobility management, software-defined networking (SDN) technology, so controlling the network task of different application is very difficult. Software-defined networks provide a better solution for simplifying the network tasks.Software-defined networking (SDN), an efficient framework integrated with 5G technology, 2 allows the present network administrators to dynamically manage and control the network resources without the need of tedious manual configuration. Here, the data plane and control plane get separated for improving the network performance. The open flow protocol of SDN enables the 5G network to be more flexible and reprogrammable.The spectrum should be efficiently utilized in 5G networks since the 5G network supports higher data rate with minimal delay. The cognitive radio is a technology 3 that paves the way for efficient utilization of spectrum by allowing unlicensed users to access the licensed spectrum. The licensed users are termed as primary users (PU) and the unlicensed users are termed as secondary users (SU). According to the Federal Communications Commission (FCC), the major portion of TV UHF band (470-590 MHz) is underutilized, ie, 100% of the TV UHF band is free, for at least 56.27% areas in the country. So to improve spectrum utilization, cognitive radio allows the unlicensed users to access the licensed spectrum whenever the spectrum is free. This improved spectrum utilization results in higher data rate with lower latency. | SDN-MANET architectureThe proposed SDN-MANET (software-defined networking-based MANET) architecture incorporates the technologies like 5G, cognit...

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Section: Introductionmentioning

confidence: 99%

Dynamic handover algorithm with interference cancellation in 5G networks for emergency communication

Kiruthika¹,

Sumathy²

2019

Int J Communication

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“…They also have excellent propagation characteristics which generally improves the indoor penetration [7]. In particular we focus at considering Cognitive Radio (CR) technology as the key technology to overcome the spectrum efficiency challenges [8]. We aim at allowing unlicensed or "secondary users (SUs)" to access the unused spectrum bands of GSM.…”

Section: Introductionmentioning

confidence: 99%

GSM‐RF Channel Characterization Using a Wideband Subspace Sensing Mechanism for Cognitive Radio Networks

Barrak

Gonnouni

Serrano

et al. 2018

Wireless Communications and Mobile Computing

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In this paper, we examine a spectrum sharing opportunities over the existing Global System of Mobile Communication (GSM) networks, by identifying the unused channels at a specific time and location. For this purpose, we propose a wideband spectrum sensing mechanism to analyze the status of 51 channels at once, belonging to the 10 MHz bandwidth centered at the frequency 945 MHz, in four different areas. We propose a subspace based spectral estimation mechanism, adapted to deal with real measurements. The process begins with data collection using Secondary User (SU) device enabled with Software Defined Radio (SDR) technology, configured to operate in the GSM band. Obtained samples are used then to feed the sensing mechanism. Spectral analysis is delivered to estimate power density peaks and corresponding frequencies. Decision making phase brings together power thresholding technique and GSM control channel decoding to identify idle and busy channels. Experiments are evaluated using detection and false alarm probabilities emulated via Receiver Operating Characteristic (ROC) curves. Obtained performances show better detection accuracy and robustness against variant noise/fading effects, when using our mechanism compared to Energy Detection (ED) based ones as Welch method, and Beamforming based ones as Minimum Variance Distortionless Response (MVDR) method. Occupancy results exhibit considerable potential of secondary use in GSM based primary network.

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“…Each cognitive radio identifies spectrum holes through spectrum sensing, spectrum sharing, adaptation, spectrum management, and so on. Due to higher levels of 5G data traffic, spectrum reuse is required . A 5G MIMO is a form of antennal technology that accommodates ultrawide bandwidths and that achieves higher levels of efficiency.…”

Section: Introductionmentioning

confidence: 99%

Secure cognitive radio‐based synchronized transmission of 5G signals using massive MIMO‐OFDM‐ES

Pari

Karuppiah

Islam

2018

Int J Communication

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Summary A cognitive radio network (CRN) can address spectrum scarcity issues to achieve higher levels of spectral efficiency. Fifth‐generation (5G) technologies are advanced telecommunication technologies that are built into CRNs. Network performance is enhanced when using a massive multiple input multiple output (MIMO) system that tolerates a large number of users based on the use of multiple antennas. Several previous research works have been conducted on 5G CRNs, although these works have failed to mitigate interference and the peak‐to‐average power ratio (PAPR). In this paper, a 5G CRN with massive MIMO that ensures secure data transmission is developed. Security is ensured via the standardized key–based secrecy method supported by a certificate authority. A CRN fusion centre (FC) plays a vital role in decision making. Fusion centre rotation is applied to mitigate interference. Massive MIMO‐OFDM effective signalling is used to address PAPR problems. The proposed CRN is experimentally modelled using network simulator 3, and its performance is evaluated. Our simulation results reveal improvements in channel capacity, a reduction in the PAPR and bit error rates, and improvements in spectral efficiency.

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An overview of cognitive radio in 5G wireless communications

Cited by 49 publications

References 0 publications

Dynamic handover algorithm with interference cancellation in 5G networks for emergency communication

Dynamic handover algorithm with interference cancellation in 5G networks for emergency communication

GSM‐RF Channel Characterization Using a Wideband Subspace Sensing Mechanism for Cognitive Radio Networks

Secure cognitive radio‐based synchronized transmission of 5G signals using massive MIMO‐OFDM‐ES

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