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2010 Proceedings of the Fifth International Conference on Cognitive Radio Oriented Wireless Networks and Communications最新文献

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Feasibility of voice service in cognitive networks over the TV spectrum 电视频谱上认知网络语音业务的可行性
2010 Proceedings of the Fifth International Conference on Cognitive Radio Oriented Wireless Networks and Communications Pub Date : 2010-06-09 DOI: 10.1049/iet-com.2010.0572
K. Koufos, K. Ruttik, R. Jäntti
{"title":"Feasibility of voice service in cognitive networks over the TV spectrum","authors":"K. Koufos, K. Ruttik, R. Jäntti","doi":"10.1049/iet-com.2010.0572","DOIUrl":"https://doi.org/10.1049/iet-com.2010.0572","url":null,"abstract":"We consider a cognitive network where the secondary users generate voice traffic and search for sharing opportunities over the TV spectrum. From the cognitive network perspective the TV bands can be idle, occupied or acceptable. A band is classified as acceptable when the TV signal is present but the secondary users can still share the band by lowering their transmission power. Therefore, the acceptable bands offer a lower rate transmission opportunity compared to the idle bands, while the occupied bands cannot be utilized at all for secondary transmission. When most of the measured bands are detected to be occupied, there might not be enough capacity to serve all the secondary users' calls. In this paper we identify the number of measured TV bands so that with a high probability all the secondary users are scheduled on some of the measured bands. The results of this paper are promising. It is shown that the number of secondary users sharing the spectrum grows much quicker than the number of TV bands required to be measured.","PeriodicalId":193648,"journal":{"name":"2010 Proceedings of the Fifth International Conference on Cognitive Radio Oriented Wireless Networks and Communications","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124711704","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
Priority channel selection based on detection history database 基于检测历史数据库的优先级通道选择
2010 Proceedings of the Fifth International Conference on Cognitive Radio Oriented Wireless Networks and Communications Pub Date : 2010-06-09 DOI: 10.4108/icst.crowncom2010.9178
J. Vartiainen, M. Höyhtyä, Janne J. Lehtomäki, Timo Bräysy
{"title":"Priority channel selection based on detection history database","authors":"J. Vartiainen, M. Höyhtyä, Janne J. Lehtomäki, Timo Bräysy","doi":"10.4108/icst.crowncom2010.9178","DOIUrl":"https://doi.org/10.4108/icst.crowncom2010.9178","url":null,"abstract":"This paper proposes a new database-based two-stage channel selection method for cognitive radios. The proposed method consists of two stages, namely the database collection and signal detection parts. The database collects information about channels. When a cognitive radio needs to find an unoccupied channel for a transmission, it sends a query to the database. Based on the information collected to the database, the most probably unoccupied channels at requesting time are the best candidates when searching unoccupied channels, and these channels are submitted to the cognitive radio. The cognitive radio performs first the power level detection. Based on the power level information delivered from the database, a full signal detection is performed next to the channel with low enough power level to ensure that the channel is really unoccupied.","PeriodicalId":193648,"journal":{"name":"2010 Proceedings of the Fifth International Conference on Cognitive Radio Oriented Wireless Networks and Communications","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129592308","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: 49
Reappearing primary user detection in FBMC/OQAM cognitive radios 在FBMC/OQAM认知无线电中再现主用户检测
2010 Proceedings of the Fifth International Conference on Cognitive Radio Oriented Wireless Networks and Communications Pub Date : 2010-06-09 DOI: 10.4108/ICST.CROWNCOM2010.9234
T. Ihalainen, Ari Viholainen, T. H. Stitz, M. Renfors
{"title":"Reappearing primary user detection in FBMC/OQAM cognitive radios","authors":"T. Ihalainen, Ari Viholainen, T. H. Stitz, M. Renfors","doi":"10.4108/ICST.CROWNCOM2010.9234","DOIUrl":"https://doi.org/10.4108/ICST.CROWNCOM2010.9234","url":null,"abstract":"This paper investigates the problem of detecting the reappearance of a primary user signal during ongoing secondary data transmission. The high frequency containment of filter bank multicarrier (FBMC) waveforms is exploited to construct, in spectrally efficient manner, continuous silent subbands within the transmission band for spectrum monitoring. Energy detection is carried out on these monitoring subbands in secondary receivers. The distribution of the test statistic is derived to characterize the detector performance in the transient phase where the reappearance of the primary signal falls arbitrarily within the integration window. The experimental data obtained from an FBMC/OQAM secondary multiplexing testbed verifies the derived analytic model. Further, the impact of the transmit power amplifier nonlinearity on the proposed spectrum monitoring scheme is discussed.","PeriodicalId":193648,"journal":{"name":"2010 Proceedings of the Fifth International Conference on Cognitive Radio Oriented Wireless Networks and Communications","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132522850","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: 11
Cooperative sensing with adaptive sensing ranges in cognitive radio ad-hoc networks 认知无线电自组织网络中自适应感知范围的协同感知
2010 Proceedings of the Fifth International Conference on Cognitive Radio Oriented Wireless Networks and Communications Pub Date : 2010-06-09 DOI: 10.4108/ICST.CROWNCOM2010.9175
Jongwon Shim, Qi Cheng, V. Sarangan
{"title":"Cooperative sensing with adaptive sensing ranges in cognitive radio ad-hoc networks","authors":"Jongwon Shim, Qi Cheng, V. Sarangan","doi":"10.4108/ICST.CROWNCOM2010.9175","DOIUrl":"https://doi.org/10.4108/ICST.CROWNCOM2010.9175","url":null,"abstract":"Cognitive radio has been proposed as an innovative and effective technology to exploit the efficient reuse of the precious radio spectrum. In spectrum sensing which is a crucial step in cognitive radio networks, an adequate sensing range needs to be defined to avoid the hidden transmitter/receiver problems. Moreover, a secondary user may have unreliable detection of the existent primary users due to multipath fading and/or shadowing. To solve these issues, we propose a cooperative spectrum sensing scheme with adaptive sensing ranges, especially for the hidden receiver problem. We explain the idea of using the adaptive sensing range at a secondary user transmitter and show with the simulation results that cooperative spectrum sensing with adaptive sensing ranges achieves a higher detection accuracy than that with a fixed sensing range.","PeriodicalId":193648,"journal":{"name":"2010 Proceedings of the Fifth International Conference on Cognitive Radio Oriented Wireless Networks and Communications","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132898187","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
Distributed multichannel random access networks with selfish users 具有自私用户的分布式多信道随机接入网络
2010 Proceedings of the Fifth International Conference on Cognitive Radio Oriented Wireless Networks and Communications Pub Date : 2010-06-09 DOI: 10.4108/ICST.CROWNCOM2010.9284
Ali Ozyagci, Ömer Ileri, J. Zander
{"title":"Distributed multichannel random access networks with selfish users","authors":"Ali Ozyagci, Ömer Ileri, J. Zander","doi":"10.4108/ICST.CROWNCOM2010.9284","DOIUrl":"https://doi.org/10.4108/ICST.CROWNCOM2010.9284","url":null,"abstract":"Dynamic spectrum access (DSA) schemes allow the users to share spectrum resources by taking advantage of the variations in spectrum demand over time and space. Carrying out dynamic spectrum allocation centrally, however, can be a complex task. For this reason, distributed schemes in which users can access the available channels independently may be preferable to centralized DSA schemes. Cognitive radio systems, which enable user terminals to sense their environment and form their action accordingly, are particularly well-suited for distributed systems. On the other hand, the freedom in distributed schemes gives the users the option to act selfishly, which has decisive effects on system performance. In this paper we consider a distributed multichannel wireless random access system where users selfishly access the channels in the system. We analyze the behavior of the selfish users by modeling the system as a non-cooperative game and we identify all stable operating points (Nash equilibria) of this game. We then compare the performance of this system with a number of cooperative distributed DSA schemes in terms of user utilities. Our results show that the performance of the selfish multichannel random access system can be comparable to cooperative schemes.","PeriodicalId":193648,"journal":{"name":"2010 Proceedings of the Fifth International Conference on Cognitive Radio Oriented Wireless Networks and Communications","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132899159","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: 4
Requirements on the information flow for intersystem coexistence and cooperation in the emerging cognitive wireless world 新兴认知无线世界对系统间共存与合作的信息流要求
2010 Proceedings of the Fifth International Conference on Cognitive Radio Oriented Wireless Networks and Communications Pub Date : 2010-06-09 DOI: 10.4108/ICST.CROWNCOM2010.9255
A. Georgakopoulos, K. Tsagkaris, V. Stavroulaki, P. Demestichas
{"title":"Requirements on the information flow for intersystem coexistence and cooperation in the emerging cognitive wireless world","authors":"A. Georgakopoulos, K. Tsagkaris, V. Stavroulaki, P. Demestichas","doi":"10.4108/ICST.CROWNCOM2010.9255","DOIUrl":"https://doi.org/10.4108/ICST.CROWNCOM2010.9255","url":null,"abstract":"The emerging cognitive wireless world considers new networking paradigms that have already started to intrigue the scientific community. In accordance to this, ETSI has proposed the Cognitive Control Network (CCN), which is based on an infrastructure-free network formation and it is an extension of the infrastructure-based Cognitive Wireless Networks (CWN) towards creating a more flexible and resource efficient, global cognitive network structure. The CCN is dynamically created, modified and terminated under the governance of CWN (governance is considered in terms of proper resources assignment, context provisioning and policies enforcement.) These are recognized as difficult management tasks that require the flow of appropriate control information among CWN and CCN and within the CCN. Framed within this statement, our work aims at addressing the requirements with respect to the control information flow for enabling the creation, modification and termination of CCN and thus, for supporting its efficient coexistence and cooperation with CWN in the emerging cognitive wireless world.","PeriodicalId":193648,"journal":{"name":"2010 Proceedings of the Fifth International Conference on Cognitive Radio Oriented Wireless Networks and Communications","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128829036","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
Learning from experts in cognitive radio networks: The docitive paradigm 向认知无线电网络中的专家学习:主动性范式
2010 Proceedings of the Fifth International Conference on Cognitive Radio Oriented Wireless Networks and Communications Pub Date : 2010-06-09 DOI: 10.4108/ICST.CROWNCOM2010.9173
Ana Galindo-Serrano, L. Giupponi, Pol Blasco, M. Dohler
{"title":"Learning from experts in cognitive radio networks: The docitive paradigm","authors":"Ana Galindo-Serrano, L. Giupponi, Pol Blasco, M. Dohler","doi":"10.4108/ICST.CROWNCOM2010.9173","DOIUrl":"https://doi.org/10.4108/ICST.CROWNCOM2010.9173","url":null,"abstract":"In this paper we introduce the novel paradigm of docition for cognitive radio (CR) networks. We consider that the CRs are intelligent radios implementing a learning process through which they interact with the surrounding environment to make self-adaptive decisions. However, in distributed settings the learning may be complex and slow, due to interactive decision making processes, which results in a non-stationary environment. The docitive paradigm proposes a timely solution based on knowledge sharing, which allows CRs to develop new capacities for selecting actions. We demonstrate that this improves the CRs' learning ability and accuracy, and gives them strategies for action selection in unvisited states. We evaluate the docitive paradigm in the context of a secondary system modeled as a multi-agent system, where the agents are IEEE 802.22 CR base stations, implementing a real-time multi-agent reinforcement learning technique known as decentralized Q-learning. Our goal is to solve the aggregated interference problem generated by multiple CR systems at the receivers of a primary system. We propose three different docitive algorithms and we show their superiority to the well know paradigm of independent learning in terms of speed of convergence and precision.","PeriodicalId":193648,"journal":{"name":"2010 Proceedings of the Fifth International Conference on Cognitive Radio Oriented Wireless Networks and Communications","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131555895","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: 23
Reconstructing geographical-spectral pattern in cognitive radio networks 认知无线电网络中地理频谱模式的重构
2010 Proceedings of the Fifth International Conference on Cognitive Radio Oriented Wireless Networks and Communications Pub Date : 2010-06-09 DOI: 10.4108/ICST.CROWNCOM2010.9109
Husheng Li
{"title":"Reconstructing geographical-spectral pattern in cognitive radio networks","authors":"Husheng Li","doi":"10.4108/ICST.CROWNCOM2010.9109","DOIUrl":"https://doi.org/10.4108/ICST.CROWNCOM2010.9109","url":null,"abstract":"The geographical-spectral pattern of interruptions from primary users within an area is important for upper layer issues like routing and congestion control in cognitive radio networks. The pattern can be considered as an image and can be recovered from reports of secondary users, like random samples for reconstructing an image. Gibbs random fields are used to model the image by employing an energy function to incorporate correlations between neighboring pixels and a priori hyperparameters. Bayesian compressed sensing is then used to reconstruct the image based on the assumption that the image is sparse in a certain transform domain. The performance of the image reconstruction is demonstrated by numerical simulations.","PeriodicalId":193648,"journal":{"name":"2010 Proceedings of the Fifth International Conference on Cognitive Radio Oriented Wireless Networks and Communications","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114519736","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: 10
Standard recognising self organizing map based cognitive radio transceiver 基于自组织地图的标准识别认知无线电收发器
2010 Proceedings of the Fifth International Conference on Cognitive Radio Oriented Wireless Networks and Communications Pub Date : 2010-06-09 DOI: 10.4108/ICST.CROWNCOM2010.9250
M. Taj, M. Akil, O. Hammami
{"title":"Standard recognising self organizing map based cognitive radio transceiver","authors":"M. Taj, M. Akil, O. Hammami","doi":"10.4108/ICST.CROWNCOM2010.9250","DOIUrl":"https://doi.org/10.4108/ICST.CROWNCOM2010.9250","url":null,"abstract":"Cognitive Radio (CR) Systems have transceivers with the ability to adjust their operating parameters after observing the results in order to decide to operate in a specific radio configuration, expecting to move the radio towards some optimized operational state. Framed within this statement, this paper introduces and evaluates the use of Self-Organizing Maps (SOM) and Linear Vector Quantization (LVQ), which are both Unsupervised Neural Network (NN) Schemes as an effective technique for reconfiguring transceivers after recognizing the specific standard based on input parameters extracted from the signal. We exploit the inherent property of SOM, tonotopy, to recognize the standard in our proposed multi-standard cognitive transceiver. We target at cognition incorporation in our Software Defined Radio (SDR) waveform, designed on a Network-on-chip (NoC) based multi-core, single chip Xilinx Virtex-4 FPGA.","PeriodicalId":193648,"journal":{"name":"2010 Proceedings of the Fifth International Conference on Cognitive Radio Oriented Wireless Networks and Communications","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130267276","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
A coupled multichannel filter bank and sniffer spectrum analyzer 耦合多通道滤波器组和嗅探器频谱分析仪
2010 Proceedings of the Fifth International Conference on Cognitive Radio Oriented Wireless Networks and Communications Pub Date : 2010-06-09 DOI: 10.4108/ICST.CROWNCOM2010.9237
F. Harris, R. McGwier, Benjamin Egg
{"title":"A coupled multichannel filter bank and sniffer spectrum analyzer","authors":"F. Harris, R. McGwier, Benjamin Egg","doi":"10.4108/ICST.CROWNCOM2010.9237","DOIUrl":"https://doi.org/10.4108/ICST.CROWNCOM2010.9237","url":null,"abstract":"The FFT, the efficient algorithm for implementing the DFT, enjoys great acceptance as the signal processing tool for spectrum analysis, for channelized receivers, and for fast convolution. In the first applications, spectrum analysis, the FFT is supported by a set of weights, the window, applied to data multiplicatively. In the second application the FFT is supported by a set of weights, the filter, applied to data convolutionally. Both operations accomplish the same task; that of spectral decomposition with controlled spectral response. In reality, the two operations are identically the same since the sliding windowed FFT is in fact a particular implementation of a resampling filter bank. Since the two processes are the same, when a system includes both a channelizer and a spectrum analyzer that steers the channelizer to spectral areas of interest the two can be combined or coupled to share their computational burden. In this paper we illustrate the benefit of this merged option.","PeriodicalId":193648,"journal":{"name":"2010 Proceedings of the Fifth International Conference on Cognitive Radio Oriented Wireless Networks and Communications","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131504786","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: 2
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