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Sensing Optimization Considering Sensing Capability of Cognitive Terminal in Cognitive Radio System 考虑认知无线电系统中认知终端感知能力的感知优化
2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008) Pub Date : 2008-05-15 DOI: 10.1109/CROWNCOM.2008.4562450
Woongsup Lee, D. Cho
{"title":"Sensing Optimization Considering Sensing Capability of Cognitive Terminal in Cognitive Radio System","authors":"Woongsup Lee, D. Cho","doi":"10.1109/CROWNCOM.2008.4562450","DOIUrl":"https://doi.org/10.1109/CROWNCOM.2008.4562450","url":null,"abstract":"Cognitive radio is a promising technology to over-come the insufficiency of available communication spectrums. In the cognitive radio system, many important issues exist. Spectrum sensing is one of the important issues, which has been studied throughout recently. In this paper, we propose a new distributed spectrum sensing scheme which considers the difference of sensing capabilities among cognitive terminals. By using our proposed scheme, we can effectively measure the sensing capability of a cognitive terminal and optimize the performance of the spectrum sensing by differentiating the number of spectrum sensing that each cognitive terminal performs. Through performance analysis and numerical results, we show that our proposed scheme can achieve desired performance in view of the probability of false alarm and the probability of miss detection compared to a conventional scheme.","PeriodicalId":409408,"journal":{"name":"2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117001679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 13
State of the Art in Opportunistic Spectrum Access Medium Access Control Design 机会频谱接入介质访问控制设计的研究现状
2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008) Pub Date : 2008-05-15 DOI: 10.1109/CROWNCOM.2008.4562475
P. Pawełczak, S. Pollin, H. W. So, Ali Motamedi, A. Bahai, R. V. Prasad, R. Hekmat
{"title":"State of the Art in Opportunistic Spectrum Access Medium Access Control Design","authors":"P. Pawełczak, S. Pollin, H. W. So, Ali Motamedi, A. Bahai, R. V. Prasad, R. Hekmat","doi":"10.1109/CROWNCOM.2008.4562475","DOIUrl":"https://doi.org/10.1109/CROWNCOM.2008.4562475","url":null,"abstract":"Opportunistic spectrum access (OSA) allows unlicensed secondary networks to share licensed spectrum in space and time, but only when licensed users are not using the spectrum. Thus this novel spectrum management technique started drawing the attention of researchers recently. Although many interesting approaches have been proposed, most techniques are early proposals that often only cover a subset of the problems related to OSA. In this paper, we give an extensive overview of medium access control design challenges specific to OSA, while discussing the main approaches proposed so far in the literature. We give an extensive survey of protocols proposed and discuss which features are not explored yet and which one need to be looked at more carefully.","PeriodicalId":409408,"journal":{"name":"2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123016849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 25
Plant-Floor Bluetooth Sensors with Adaptive Interference Management 具有自适应干扰管理的车间蓝牙传感器
2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008) Pub Date : 2008-05-15 DOI: 10.1109/CROWNCOM.2008.4562514
B. Ramanjaneyulu, E. Gopinathan
{"title":"Plant-Floor Bluetooth Sensors with Adaptive Interference Management","authors":"B. Ramanjaneyulu, E. Gopinathan","doi":"10.1109/CROWNCOM.2008.4562514","DOIUrl":"https://doi.org/10.1109/CROWNCOM.2008.4562514","url":null,"abstract":"When different wireless devices of various technologies that operate in the same frequency band, are deployed at sensor and controller levels of plant floors, it is possible for them to cause interference to each other's transmissions. In general Bluetooth or ZigBee like low power solutions are used at sensor levels and high-power solutions like Wi-Fi are used at controller levels. In these contexts, the low-power sensor transmissions suffer more. It results in lesser throughput and higher latencies of sensor data. Because of these increased latencies, sensors may fail to satisfy their real-time data transfer obligations. In such cases, techniques like selective retransmissions of high-priority data and hop-sequence rearrangement of frequency-hopping devices would be useful to manage the interference problems of sensor level devices. Three such methods are proposed in this work. By employing these methods, wireless sensors that operate in interfered environments can be made to support real-time data transfers that are possible with wired sensor buses like controller area network (CAN).","PeriodicalId":409408,"journal":{"name":"2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115634190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Dynamic Spectrum Access Techniques: TPC-resilient Initial Access in Open Spectrum Bands 动态频谱接入技术:开放频段的tpc弹性初始接入
2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008) Pub Date : 2008-05-15 DOI: 10.1109/CROWNCOM.2008.4562489
Moonwon Lee, Gwangzeen Ko, Sunmin Lim, M. Song, Chang-Joo Kim
{"title":"Dynamic Spectrum Access Techniques: TPC-resilient Initial Access in Open Spectrum Bands","authors":"Moonwon Lee, Gwangzeen Ko, Sunmin Lim, M. Song, Chang-Joo Kim","doi":"10.1109/CROWNCOM.2008.4562489","DOIUrl":"https://doi.org/10.1109/CROWNCOM.2008.4562489","url":null,"abstract":"Fast frequency channel saturation is one of big challenges in open spectrum bands. System designers may easily come up with TPC (transmission power control) applied to the down-streams of a network, to increase the cell reuse factor, but this scheme alone is likely to encounter initial access issues where beacons are not either receivable or decodable inside the network's maximum transmission range. Such problems can be handled in two major approaches: first, relaying beacons in a distributed manner to statistically sweep out hidden areas; and second, explicit demand of beacons from a connecting device. The latter is called active scan (or sending probes) and can guarantee successful connections to the network if, and only if, appropriate mechanisms are provided to avoid interference to neighboring networks. In that context, we will explore a wide span of DSA (dynamic spectrum access) techniques and introduce a system, called DPA (discrete probe access)-OFDMA, where probe frames are transmitted with orthogonality maintained in the power and code domain. A group of cognitive techniques to boost the efficiency of active scans will be presented too.","PeriodicalId":409408,"journal":{"name":"2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008)","volume":"240 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124636865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Low Complexity Reconfigurable Filter Bank Architecture for Spectrum Sensing in Cognitive Radios 面向认知无线电频谱感知的低复杂度可重构滤波器组结构
2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008) Pub Date : 2008-05-15 DOI: 10.1109/CROWNCOM.2008.4562506
R. Mahesh, A. P. Vinod, C. Moy, J. Palicot
{"title":"A Low Complexity Reconfigurable Filter Bank Architecture for Spectrum Sensing in Cognitive Radios","authors":"R. Mahesh, A. P. Vinod, C. Moy, J. Palicot","doi":"10.1109/CROWNCOM.2008.4562506","DOIUrl":"https://doi.org/10.1109/CROWNCOM.2008.4562506","url":null,"abstract":"The primary task in any cognitive radio (CR) network is to dynamically sense the radio spectrum so as to reliably determine portion(s) of the frequency band that may be used for communication link(s). Recently spectrum sensing for CRs based on filter banks have been addressed in literature. It was suggested that using filter banks for spectrum sensing would offer new opportunities of communicating at no extra cost. This means the reuse of sensing filter banks for transmission purpose also. But there was no consideration on the complexity issues associated with filter banks for CR. In this paper, we present a new low complexity reconfigurable filter bank architecture for multi-standard CR. The proposed filter bank is compared with other approaches and comparison results show that the proposed architecture is ideally suited for the CR systems.","PeriodicalId":409408,"journal":{"name":"2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121229778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 27
Security in Cognitive Radio Networks: The Required Evolution in Approaches to Wireless Network Security 认知无线网络中的安全:无线网络安全方法的必要演变
2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008) Pub Date : 2008-05-15 DOI: 10.1109/CROWNCOM.2008.4562536
J. Burbank
{"title":"Security in Cognitive Radio Networks: The Required Evolution in Approaches to Wireless Network Security","authors":"J. Burbank","doi":"10.1109/CROWNCOM.2008.4562536","DOIUrl":"https://doi.org/10.1109/CROWNCOM.2008.4562536","url":null,"abstract":"This paper discusses the topic of wireless security in cognitive radio networks, delineating the key challenges in this area. With the ever-increasing scarcity of spectrum, cognitive radios are expected to become an increasingly important part of the overall wireless networking landscape. However, there is an important technical area that has received little attention to date in the cognitive radio paradigm: wireless security. The cognitive radio paradigm introduces entirely new classes of security threats and challenges, and providing strong security may prove to be the most difficult aspect of making cognitive radio a long-term commercially-viable concept. This paper delineates the key challenges in providing security in cognitive networks, discusses the current security posture of the emerging IEEE 802.22 cognitive radio standard, and identifies potential vulnerabilities along with potential mitigation approaches.","PeriodicalId":409408,"journal":{"name":"2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122263256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 138
Spectrum Sensing Prototype for Sensing ATSC and Wireless Microphone Signals 频谱传感原型感应ATSC和无线麦克风信号
2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008) Pub Date : 2008-05-15 DOI: 10.1109/CROWNCOM.2008.4562520
M. Ghosh, V. Gaddam, Gene Turkenich, K. Challapali
{"title":"Spectrum Sensing Prototype for Sensing ATSC and Wireless Microphone Signals","authors":"M. Ghosh, V. Gaddam, Gene Turkenich, K. Challapali","doi":"10.1109/CROWNCOM.2008.4562520","DOIUrl":"https://doi.org/10.1109/CROWNCOM.2008.4562520","url":null,"abstract":"Spectrum sensing is the key enabler for dynamic spectrum access in the television (TV) bands as it can allow secondary networks to reuse spectrum without causing harmful interference to primary users. In this paper we describe a sensing prototype that has been developed to demonstrate robust sensing of TV signals as well as wireless microphone signals in the laboratory and field. We will present the algorithms as well as simulation, lab and field test results that validate the prototype's capability to identify these signals down to a level of -116 dBm.","PeriodicalId":409408,"journal":{"name":"2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128272004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 46
A New Approach to Improve Signal Classification in Low SNR Environment in Spectrum Sensing 频谱感知中提高低信噪比环境下信号分类的新方法
2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008) Pub Date : 2008-05-15 DOI: 10.1109/CROWNCOM.2008.4562526
Hang Liu, Dan Yu, Xiangwei Kong
{"title":"A New Approach to Improve Signal Classification in Low SNR Environment in Spectrum Sensing","authors":"Hang Liu, Dan Yu, Xiangwei Kong","doi":"10.1109/CROWNCOM.2008.4562526","DOIUrl":"https://doi.org/10.1109/CROWNCOM.2008.4562526","url":null,"abstract":"The performance of cognitive radio is sensitive to the accuracy of signal classification. The proposed method can increase the accuracy of existing methods on the certain degree at SNR=0 dB and below. In simulation, we classify five types of signals which are AM, BPSK, FSK, MSK and QPSK. The experiments show that above 99.9% received signals are correctly classified at SNR=-12 dB and above.","PeriodicalId":409408,"journal":{"name":"2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008)","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127330803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 16
Statistical Test Based on Finding the Optimum Lag in Cyclic Autocorrelation for Detecting Free Bands in Cognitive Radios 基于循环自相关最佳滞后的认知无线电自由频段检测统计检验
2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008) Pub Date : 2008-05-15 DOI: 10.1109/CROWNCOM.2008.4562528
Hao Feng, Yanbo Wang, Shiju Li
{"title":"Statistical Test Based on Finding the Optimum Lag in Cyclic Autocorrelation for Detecting Free Bands in Cognitive Radios","authors":"Hao Feng, Yanbo Wang, Shiju Li","doi":"10.1109/CROWNCOM.2008.4562528","DOIUrl":"https://doi.org/10.1109/CROWNCOM.2008.4562528","url":null,"abstract":"Cognitive radios sense the radio spectrum in order to find free bands for transmission. In this paper, a novel method is proposed for detecting free bands by exploiting a statistical test based on finding the optimum lag in cyclic autocorrelation of primary user signals within the framework of cyclostationarity theory. This approach has a satisfying detecting performance under low SNR conditions and is computational efficient. Meanwhile, due to signals' cyclostationarity, the method also has a good anti-interference property which can be utilized to detect the primary user signals in the presence of interference. Finally, simulations are performed to verify those properties of the proposed method.","PeriodicalId":409408,"journal":{"name":"2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131915623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Power and Rate Control for Cognitive Radios: A Dynamic Programming Approach 认知无线电的功率和速率控制:一种动态规划方法
2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008) Pub Date : 2008-05-15 DOI: 10.1109/CROWNCOM.2008.4562462
Long Gao, Shuguang Cui
{"title":"Power and Rate Control for Cognitive Radios: A Dynamic Programming Approach","authors":"Long Gao, Shuguang Cui","doi":"10.1109/CROWNCOM.2008.4562462","DOIUrl":"https://doi.org/10.1109/CROWNCOM.2008.4562462","url":null,"abstract":"In this paper, we investigate the power and rate control schemes for multiple cognitive radio (CR) links in the same neighborhood, which operate over multiple channels (frequency bands) in the presence of licensed primary radios (PRs). Specifically, by considering a practical delay in spectrum sensing, an efficient algorithm based on dynamic programming (DP) is proposed to maximize the average sum-rate of the CR links over a finite time horizon under the constraints on the CR-to-PR interference and the average transmit power for each CR link. In the proposed algorithm, the PR occupancy of each channel is modeled as a discrete-time Markov chain (DTMC). Based on such a model, a novel power and rate control strategy is derived, which is a function of the delayed spectrum sensing output, the instantaneous channel gains for the CR links, and the remaining power budgets for the CR transmitters. Simulation results show that the proposed algorithm leads to significant performance improvement over heuristic algorithms.","PeriodicalId":409408,"journal":{"name":"2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133299297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
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