Design of MAC protocol and performance analysis for heterogeneous nodes separating CRSN by Deyue MENG, Errong PEI, Youlin HUANG

“…Cognitive wireless sensor network (CRSN) is a new type of network that introduces cognitive radio (CR) technology into traditional WSN,and has certain application value and developmental prospect.However,the additional energy consumption,processing requirements and its high cost implementation have hindered its further development and application.Based on this,transfering cognitive functions to another nodes——cognitive nodes which have ability of processing and collecting energy was proposed.The cognitive nodes were deployed with the ordinary sensor nodes according to the certain proportion.They form a new type of network——heterogeneous node CRSN (HT-CRSN).The new network can improve network performance and reduce the deployment cost.Then a work schedule which can be applied to this kind of heterogeneous node sensor networks and a series of feasible MAC protocols was proposed.The analysis of the proposed MAC protocol proves that energy consumption can be balanced by adjusting the deployed ratio of the two kinds of heterogeneous nodes and the network life cycle is improved.…”
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Delay-optimal spectrum decision method for cognitive network by Wu-jian SUN, Na LI, Yang LIU, Le SUN, Tao CHEN, Hao LI, Ou LI

“…Spectrum decision was investigated within the confine of spectrum management framework for cognitive radio networks.Sensing errors in PHY layer,outage probability on wireless channel and multiple interruptions of primary user were taken into consideration.Probability-based and sensing-based spectrum decision methods were proposed,which were capable of balancing traffic evenly among licensed.For the probability-based method,short-time first discipline was employed to further shorten average residual time,closed-formed expression were presented based on dynamical programing.For the sensing based method,new channel could be chosen for uncompleted transmission,which alleviated the time spent in waiting primary user.Optimal residual time was obtained by choosing the minimal value of the two methods.Furthermore,spectrum heterogeneity was taken into consideration and theoretical analysis was of general sense.Simulation results validate the approach is efficient.…”
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Research on the spectrum sensing and sharing technology in the dynamic spatiotemporal data driven cognitive Internet of vehicles by Caili GUO, Jiujiu CHEN, Yidi XUAN, He ZHANG

“…With the explosive development of the intellectualization and network connection of the global automobile industry,the communication technology as a crucial support of the Internet of vehicles (IoV) is facing the problem of spectrum shortage.In addition to providing security services,the diverse service demands of the IoV make the introduction of the cognitive radio technology an effective solution,which can share heterogeneous spectrum resources integrating the sub-6 GHz and millimeter-wave spectrum resources with primary users.But the performance is limited due to the influence of the complex dynamic environment of the IoV.To address this issue,a novelty method was proposed which aimed to make full use of the potential multi-source dynamic spatiotemporal data,mine and learn the changing rules of the vehicle trajectory and traffic flow,and the rules were used to guide the sensing and sharing of the spectrum resource.The system-level simulation platform was built for simulation analysis,the results showed that the performance of the proposed scheme was effectively improved.…”
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Outage performance analysis of IRS-aided cognitive satellite-terrestrial network by Min LIN, Huaibo GUO, Xiaoyu LIU, Lue HAN, Miaomiao TAN, Lyuxi YANG

“…The outage performance of intelligent reflecting surface (IRS) aided cognitive satellite-terrestrial network was analyzed.Firstly, for the scenario where the point beam was enabled at the satellite to serve the earth station, and the IRS and non-orthogonal multiple access (NOMA) were deployed at the base station to expand the communication range and serve multiple users, respectively, under the condition that cognitive radio technology was employed to enable spectrum sharing between the satellite primary network and the terrestrial secondary network, an optimization problem was established to maximize the average signal-to-noise ratio of terrestrial users.Secondly, a low complexity IRS phase shift design was proposed by using channel state information based on the angle domain, and the phase shift matrix of IRS was obtained.Then, the closed-form expressions of outage probabilities of terrestrial users were derived when users were static and moving, respectively.Furthermore, the asymptotic outage probability formulas at high signal-to-noise ratio were also derived to analyze the system performance.Finally, the correctness of derivation and the influence of main parameters on outage performance were verified by computer simulations.…”
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Jamming-resilient algorithm for underwater cognitive acoustic networks by Zixiang Wang, Fan Zhen, Senlin Zhang, Meiqin Liu, Qunfei Zhang

“…In the underwater cognitive acoustic networks, the anti-jamming problem is quite different from cognitive radio networks. It calls for an effective anti-jamming strategy in the cognitive acoustic channel access. …”
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A Novel Decentralized Scheme for Cooperative Compressed Spectrum Sensing in Distributed Networks by Huang Jijun, Zha Song

“…However, the computation overhead incurred by compressed reconstruction is nontrivial, especially in a power-constrained cognitive radio (CR). Moreover, additional information, which is generally unavailable in practice, is needed in conventional CS-based wideband spectrum sensing schemes to improve the reconstruction quality as well as the detection performance. …”
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Cooperative Sequential Sensing of Radio Transmissions in 5G with Improved Cost-Delay Tradeoff by Xiaoyu Qiao, Weiliang Xie, Fengyi Yang

“…Especially for deployment of cognitive radio in 5G, spectrum sensing is regarded as a key technique. …”
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A Review of Cognitive Control: Advancement, Definition, Framework, and Prospect by Zhenfei Liu, Xunhe Yin

“…Cognitive control is then compared with similar concepts, such as cognitive radio and cognitive radar, and similar control methods, such as intelligent control, robust control, and adaptive control. …”
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Smart contract-based secure cooperative spectrum sensing algorithm by Chu Ji, Qi Zhu

“…Spectrum sensing is the key technology of cognitive radio. In this article, we apply blockchain technology in spectrum sensing process and propose a related algorithm based on reputation. …”
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Convergence Research Directions in Cognitive Sensor Networks for Elderly Housing Design by Shinil Suh, Byung-Seo Kim, Jae Hee Chung

“…The proposed directions are to utilize cognitive radio technologies, to classify sensor network technologies according to the types of the elderly, to expand sensor networks services for the elderly housing to the wider area such as blocking unnecessary energy loss, to embed sensor network modules into BIM system, and to research sensor networks fit to modular construction.…”
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Differentiated services dynamic spectrum access strategy for cognitive wireless mesh network by Rui-fang LI, Quan LIU, Ren-fa LI

“…Dynamic spectrum access (DSA) is an important design aspect for cognitive radio network.Common access of multi-type services having different quality of service (QoS) requirements is the important characteristic of cognitive wireless mesh network.Differentiated service (DS) is the key to realize the high efficiency use of spectrum resources and to guarantee the high quality transmission of services.In order to satisfy the demand for multi-type services,a differentiated services dynamic spectrum access strategy was proposed.In this strategy,the unlicensed user traffic was divided into three priority classes.The DSA scheme uses different access mechanisms for the three classes of unlicensed users.The real-time traffic selectes available channel set according to the shortest expected delay to reduce the transmission time and the probability of appearance of licensed user during data transmission process.The general traffic selectes the channel of largest successful transmission probability to avoid spectrum handoff.The theoretical and experimental results show that,when compared with the traditional cognitive networks DSA strategy,the proposed strategy is able to guarantee different QoS for the various services,shorter transmission delay for higher priority services,reducing the probability of transmission interruption and better throughput performance when the vacancy rate of licensed channel is major and heavy network load.…”
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SPECTRUMNET: Cooperative Spectrum Monitoring Using Deep Neural Networks by M. Suriya, M. G. Sumithra

“…Spectrum monitoring is one of the significant tasks required during the spectrum sharing process in cognitive radio networks (CRNs). Although spectrum monitoring is widely used to monitor the usage of allocated spectrum resources, this work focuses on detecting a primary user (PU) in the presence of secondary user (SU) signals. …”
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High-Level Design Space and Flexibility Exploration for Adaptive, Energy-Efficient WCDMA Channel Estimation Architectures by Zoltán Endre Rákossy, Zheng Wang, Anupam Chattopadhyay

“…To tackle the flexibility requirement, software-defined radio (SDR) is emerging as an obvious solution, where the underlying hardware implementation is tuned via software layers to the varied standards depending on power-performance and quality requirements leading to adaptable, cognitive radio. In this paper, we conduct a case study for representatives of two complexity classes of WCDMA channel estimation algorithms and explore the effect of flexibility on energy efficiency using different implementation options. …”
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Defense against Malicious Users in Cooperative Spectrum Sensing Using Genetic Algorithm by Noor Gul, Ijaz Mansoor Qureshi, Atif Elahi, Imtiaz Rasool

“…In cognitive radio network (CRN), secondary users (SUs) try to sense and utilize the vacant spectrum of the legitimate primary user (PU) in an efficient manner. …”
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Multiantenna Spectrum Sensing in the Presence of Multiple Primary Users over Fading and Nonfading Channels by Dayan Adionel Guimarães, Rausley Adriano Amaral de Souza, Guilherme Pedro Aquino

“…The basis of this paper is Wei and Tirkkonen, 2012, in which expressions for the key performance metrics of the sphericity test applied to the multiantenna cooperative spectrum sensing of multiple primary transmitters in cognitive radio networks over nonfading channels are provided. …”
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Cognitive Scout Node for Communication in Disaster Scenarios by Rajesh K. Sharma, Anastasia Lavrenko, Dirk Kolb, Reiner S. Thomä

“…The cognitive radio (CR) concept has appeared as a promising technology to cope with the spectrum scarcity caused by increased spectrum demand due to the emergence of new applications. …”
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A Distance-Aware Safety-Related Message Broadcasting Algorithm for Vehicular Networks by Xiaohuan Li, Bin-jie Hu, Hongbin Chen, Jin Ye

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Robust Spectrum Sensing Demonstration Using a Low-Cost Front-End Receiver by Daniele Borio, Emanuele Angiuli, Raimondo Giuliani, Gianmarco Baldini

“…Spectrum Sensing (SS) is an important function in Cognitive Radio (CR) to detect primary users. The design of SS algorithms is one of the most challenging tasks in CR and requires innovative hardware and software solutions to enhance detection probability and minimize low false alarm probability. …”
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Simulation and analysis of software defined cognitive frequency hopping multi beam satellite system by Heng-zhi LI, Chun-feng WANG

“…Traditional multi-beam satellites cannot adapt to the changing traffic because of the fixed bandwidth and cannot adjust dynamically for the traffic load.In the future,the multi-beam broadband satellite system must have great flexibility and can be dynamically adjusted according to the change of the traffic flow.Beam hopping for multi-beam broadband satellite network system has been proposed to improve the traditional multi-beam broadband satellite network system performance,whose principle is to assign different beams to different time slots,rather than the allocation of bandwidth,so that in each time slot,the entire available bandwidth is allocated to each beam,and the time window is periodically applied to the beam selection system ,in the full band hopping mode,the band can be selected optimally in the duration of each beam to meet user transmission bandwidth and delay requirements.With the development of cognitive radio technology,cognitive beam hopping for multi-beam satellite system can further improve the efficiency of spectrum utilization,to meet the growing shortage of spectrum resources,to achieve large-capacity high-bandwidth broadband satellite network system,and to support the rising user service capacity and the transmission efficiency of user services under different load conditions.In addition,software definition technology is also used in satellite networks,which could achieve effective management of satellite resources to improve the utilization of satellite resources.In this paper,the principle of software-defined cognitive hopping multi-beam broadband satellite network system is discussed.The spectrum utilization efficiency and throughput are analyzed,which can be used as a reference for broadband satellite network system design.…”
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A Virtualization Approach to Correct Systematic Errors in Measured TDOA and FDOA for Low Orbit Dual-Satellite Positioning Systems by Gang Li, Min Zhou, Hongwen Tang, Hongbin Chen

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