opportunistic spectrum access
Goodput and channel allocation in opportunistic spectrum access networks
... Cognitive radio [3] also known as opportunistic spectrum access (OSA) has emerged as a promising solution to in- crease the spectrum efficiency [4]. Cognitive radio enables the unlicensed ...
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User Based Discrete Time Queuing Analysis for Opportunistic Spectrum Access in Cognitive Radio Networks
... for opportunistic spectrum access in CR networks was firstly provided by ...dynamic spectrum access in dis- tributed CR networks were summarized in [3] ...optimized spectrum ...
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Proof-of-Concept System for Opportunistic Spectrum Access in Multi-user Decentralized Networks
... electromagnetic spectrum and ever increasing demand for spectrum to support data intensive services envisioned in 5G have led academia as well as industrial partners to explore the feasibility of ...
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FSMA A topology transparent scheme for opportunistic spectrum access
... for spectrum access can achieve near-optimal spectrum utilization by letting users sense and utilize available spectrum ...optimal spectrum allocations for a given network ...reallocate ...
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Opportunistic Spectrum Access in Self-Similar Primary Traffic
... 1.1. Opportunistic Spectrum Access. The “spectrum paradox” is by now widely ...projected spectrum need for wireless devices and services continues to grow, and virtually all usable ...
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A Unified Approach to Optimal Opportunistic Spectrum Access under Collision Probability Constraint in Cognitive Radio Systems
... open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly ...fundamental ...
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Fuzzy Prediction Based Opportunistic Spectrum Access for Cognitive Radio
... based opportunistic spectrum access for cognitive radio is ...Based Opportunistic Spectrum Access (FPBOSA) consists of Fuzzy Prediction Based Opportunistic Spectrum ...
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Analysis of opportunistic spectrum access in cognitive radio networks using hidden Markov model with state prediction
... The spectrum resources are rare, and a large part of the spectrum licensed for various applications are not fully used in times or in ...of spectrum sharing is referred to as opportunistic ...
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Opportunistic Spectrum Access Using Greedy And Optimal Approach in Cognitive Radios
... frequency spectrum. Spectrum sensing to detect the presence of primary signals is one of the most important functionalities of cognitive radio’s since the devices need to reliably detect weak primary ...
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Implementing opportunistic spectrum access in LTE advanced
... allocated spectrum band ...these spectrum opportunities and to exploit them as long as the opportunity remains, ...available spectrum awareness techniques, we adopt spectrum sen- ...
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Spectrum sharing in cognitive radio networks
... interweave access. In interweave access, the SU finds spectrum holes (white space) by sensing the radio frequency ...of spectrum holes in the PU channels are highlighted in ...These ...
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Design and Analysis of an OSA BR MAC Protocol for Cognitive Radio Ad Hoc Networks
... Opportunistic Spectrum Access with Backup Channel (SWITCH) [7] and DCA-MAC protocol [8] are exam- ples of this ...the Opportunistic Spectrum Access (OSA-MAC) protocol ...channel ...
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International Journal of Computer Science and Mobile Computing
... Dynamic Spectrum Allocation in Cognitive Radio Ad Hoc Networks” works on Throughput ...local spectrum resources may change from time to time and ...cross-layer opportunistic spectrum ...
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The effect of the spectrum opportunities diversity on opportunistic access
... Opportunistic spectrum access may rely on a combination of geolocation databases and spectrum sensing to detect spectrum ...for spectrum holes, secondary radios (SRs) can learn ...
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Opportunistic relaying and jamming with robust design in hybrid full/half duplex relay system
... efficient solution to enhance the legitimate transmission is through cooperative relaying or confusing the eaves- droppers via cooperative jamming. Recently, relay co- operation diversity has attracted more and more ...
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Quantitative social relations based on trust routing algorithm in opportunistic social network
... between the model and other existing models in optimiz- ing the network structure and increasing the success rate of information transmission and (2) adaptability analysis: through the process of dynamic changes in ...
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A Fair Opportunistic Access Scheme for Multiuser OFDM Wireless Networks
... First we focus on the fairness provided by each sched- uler. Figures 7(a), 7(b), 7(c), and 7(d) display the overall PDOR for different traffic loads considering the influence of the distance on the scheduling. The classical ...
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Optimizing cooperative cognitive radio networks with opportunistic access
... limited spectrum. Due to the fixed spectrum allocation policy, only the licensed users, oth- erwise known as primary users, are able to access the licensed ...the spectrum is being used [1]. ...
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Clinical spectrum of paediatric HIV infection in a tertiary care centre in South India
... In all these studies wide variation was particularly noted in respiratory conditions like pulmonary tuberculosis, recurrent/persistent pneumonia, LIP and PCP. This indirectly reflects the difficulty in making proper ...
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Game theoretic analysis of opportunistic spectrum sharing with imperfect sensing
... In this paper, we considered the SUs’ joining behavior in cognitive radio network with a single bandwidth under imperfect spectrum sensing. We used the constant retrial queueing system with server breakdowns to ...
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