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Optimal entropy-based spectrum sensing for cognitive radio networks under severe path loss conditions 基于最优熵的认知无线电网络频谱感知在严重路径损耗条件下
8th International Conference on Cognitive Radio Oriented Wireless Networks Pub Date : 2013-07-08 DOI: 10.4108/icst.crowncom.2013.252065
W. Ejaz, M. K. Atiq, H. Kim, G. Shah
{"title":"Optimal entropy-based spectrum sensing for cognitive radio networks under severe path loss conditions","authors":"W. Ejaz, M. K. Atiq, H. Kim, G. Shah","doi":"10.4108/icst.crowncom.2013.252065","DOIUrl":"https://doi.org/10.4108/icst.crowncom.2013.252065","url":null,"abstract":"Recently maritime cognitive radio network is proposed to provide high bandwidth and low communication cost for maritime users. Spectrum sensing is one of the key issues to develop cognitive radio networks. Radio propagation is one of the main differences between maritime and land environment. Traditional detectors such as matched filter, energy detector and cyclostationary detector are not robust under low signal-to-noise ratio and at high sea state conditions. To deal with maritime environmental challenges, an entropy-based spectrum sensing scheme with the optimal number of samples is presented in this paper. Since spectrum sensing is sensitive to the number of samples, the optimal number of samples has been introduced in the proposed scheme to get minimum sensing time and maximum detection probability. Results reveal that existing scheme works well for the lower sea states but failed to perform at higher sea states. Moreover, simulation results show that the entropy-based scheme is robust at higher sea states in comparison with the traditional energy detector.","PeriodicalId":425536,"journal":{"name":"8th International Conference on Cognitive Radio Oriented Wireless Networks","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128081586","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: 6
Whitespace networks relying on dynamic control channels 空白网络依赖于动态控制通道
8th International Conference on Cognitive Radio Oriented Wireless Networks Pub Date : 2013-07-08 DOI: 10.4108/icst.crowncom.2013.252068
Jacek Kibiłda, J. Tallon, K. Nolan, L. A. Daxilva
{"title":"Whitespace networks relying on dynamic control channels","authors":"Jacek Kibiłda, J. Tallon, K. Nolan, L. A. Daxilva","doi":"10.4108/icst.crowncom.2013.252068","DOIUrl":"https://doi.org/10.4108/icst.crowncom.2013.252068","url":null,"abstract":"The emergence of whitespace networks, and whitespace communications in general, provides an opportunity to, at least partially, meet the ever-growing demand for mobile data communication. Most of the whitespace network solutions proposed so far realize coordination and rendezvous over licensed or unlicensed spectrum. In this paper we propose a protocol for networks that rely solely on whitespace spectrum. The proposed protocol allows both communication to the broader network (via the access point) and direct device-to-device links over whitespaces. To showcase the capabilities of the proposed solution we have implemented a proof-of-concept software defined radio experiment. Using the experimental platform we have evaluated the overheads of whitespace operation, which come in the form of an extra delay in association and a throughput loss of around 15% of that achievable with licensed spectrum. Our goal is to provide the groundwork for future radio systems that will operate in whitespace spectrum.","PeriodicalId":425536,"journal":{"name":"8th International Conference on Cognitive Radio Oriented Wireless Networks","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132409559","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: 3
Harvesting MDT data: Radio environment maps for coverage analysis in cellular networks 收集MDT数据:用于蜂窝网络覆盖分析的无线电环境图
8th International Conference on Cognitive Radio Oriented Wireless Networks Pub Date : 2013-07-08 DOI: 10.4108/icst.crowncom.2013.252055
Ana Galindo-Serrano, B. Sayraç, S. B. Jemaa, Janne Riihijärvi, P. Mähönen
{"title":"Harvesting MDT data: Radio environment maps for coverage analysis in cellular networks","authors":"Ana Galindo-Serrano, B. Sayraç, S. B. Jemaa, Janne Riihijärvi, P. Mähönen","doi":"10.4108/icst.crowncom.2013.252055","DOIUrl":"https://doi.org/10.4108/icst.crowncom.2013.252055","url":null,"abstract":"Despite the remarkable progress in radio access technology to support the rapidly increasing wireless data demand, coverage analysis remains as one of the indispensable topics on which mobile operators still need innovations, above all, in terms of operational efficiency together with performance. Manual coverage detection and prediction is an inefficient and costly task. In this paper we show how Radio Environment Maps (REMs) developed as part of the research on cognitive wireless networks can be used as a basis for a powerful coverage estimation and prediction solution for present-day cellular networks. Applying powerful spatial interpolation techniques on the information coming from location-aware devices, REMs provide a realistic and remote representation of the ground-truth. The proposed approach automatically identifies the number, location and shape of the existing coverage holes and therefore constitutes a perfect example of a novel application of the Cognitive Radio concept on next generation cellular networks. Results on urban and rural environments show that the use of REM brings promising gains in coverage hole detection and prediction with respect to the case where only measurements are used.","PeriodicalId":425536,"journal":{"name":"8th International Conference on Cognitive Radio Oriented Wireless Networks","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121400036","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: 35
A feature partitioning approach to casebased reasoning in cognitive radios 认知无线电基于案例推理的特征划分方法
8th International Conference on Cognitive Radio Oriented Wireless Networks Pub Date : 2013-07-08 DOI: 10.4108/icst.crowncom.2013.252035
Daniel Ali, J. Park, A. Amanna
{"title":"A feature partitioning approach to casebased reasoning in cognitive radios","authors":"Daniel Ali, J. Park, A. Amanna","doi":"10.4108/icst.crowncom.2013.252035","DOIUrl":"https://doi.org/10.4108/icst.crowncom.2013.252035","url":null,"abstract":"Cognitive radios have applied various forms of artificial intelligence (AI) to wireless systems in order to solve the complex problems presented by proper link management, network traffic balance, and system efficiency. Case-based reasoning (CBR) has seen attention as a prospective avenue for storing and organizing past information in order to allow the cognitive engine to learn from previous experience. CBR uses past information and observed outcome to form empirical relationships that may be difficult to model using theory. As wireless systems become more complex and more tightly time constrained, scalability becomes an apparent concern to store large amounts of information over multiple dimensions. This paper presents a quickly accessible data structure designed to reduce access time several orders of magnitude as opposed to traditional similarity calculation methods. A framework is presented for case representation, which provides the core of useful information contained within a case. By grouping possible similarity dimension values into distinct partitions called buckets, we develop a data structure with constant (O(1)) access time.","PeriodicalId":425536,"journal":{"name":"8th International Conference on Cognitive Radio Oriented Wireless Networks","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131750053","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
Inference-driven dynamic access scheme for interference management in heterogeneous networks 异构网络中干扰管理的推理驱动动态接入方案
8th International Conference on Cognitive Radio Oriented Wireless Networks Pub Date : 2013-07-08 DOI: 10.4108/icst.crowncom.2013.252172
A. Elsherif, Z. Ding, Xin Liu, Jyri Hämäläinen, R. Wichman
{"title":"Inference-driven dynamic access scheme for interference management in heterogeneous networks","authors":"A. Elsherif, Z. Ding, Xin Liu, Jyri Hämäläinen, R. Wichman","doi":"10.4108/icst.crowncom.2013.252172","DOIUrl":"https://doi.org/10.4108/icst.crowncom.2013.252172","url":null,"abstract":"We propose a scheme for interference management in wireless heterogeneous networks. We, specifically, consider the problem of downlink interference of a Home eNB (HeNB) to nearby macrocell user equipments (MUEs) served by a macrocell base station. We propose a distributed, self-learning channel access mechanism that enables the HeNB to adaptively change its access to channels shared with neighboring MUEs. Basically, the HeNB accesses the channel with a probability that is updated based on the overheard uplink feedback information from neighboring MUEs. We formulate an optimization problem with the goal of maximizing the achieved rate for the HeNB under the constraint of maintaining a quality of service (QoS) requirement for neighboring MUEs.","PeriodicalId":425536,"journal":{"name":"8th International Conference on Cognitive Radio Oriented Wireless Networks","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124796960","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
Combinatorial auction based channel allocation in cognitive radio networks 基于组合拍卖的认知无线网络信道分配
8th International Conference on Cognitive Radio Oriented Wireless Networks Pub Date : 2013-07-08 DOI: 10.4108/icst.crowncom.2013.252028
Wei Zhou, Tao Jing, Wei Cheng, Tao Chen, Yan Huo
{"title":"Combinatorial auction based channel allocation in cognitive radio networks","authors":"Wei Zhou, Tao Jing, Wei Cheng, Tao Chen, Yan Huo","doi":"10.4108/icst.crowncom.2013.252028","DOIUrl":"https://doi.org/10.4108/icst.crowncom.2013.252028","url":null,"abstract":"Combinatorial auction with flexible bidding formats is proposed in this paper for the channel allocation problem in cognitive radio networks. Different from other auction mechanisms, our solution includes the channel characteristic and user requirements in the biding, and therefore has more freedom to reflect the preference of secondary users on the channel selection. Four bidding formats are introduced, each of which has different emphasis to maximize social welfare of the spectrum resource. The details of each bidding format are explained, followed by the optimal solution or approximation solution proposed for each format. The approximation ratio of proposed algorithms is analyzed. Finally a numerical test is conducted in terms of social welfare and spectrum utilization. The test shows that actual approximation ratio is close to the optimal one.","PeriodicalId":425536,"journal":{"name":"8th International Conference on Cognitive Radio Oriented Wireless Networks","volume":"271 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123365059","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: 9
Observations on Sum User Rate for Cellular Downlink 蜂窝下行总用户速率的观察
8th International Conference on Cognitive Radio Oriented Wireless Networks Pub Date : 2013-07-08 DOI: 10.4108/icst.crowncom.2013.252376
Alex Fridman, J. Wildman, S. Weber
{"title":"Observations on Sum User Rate for Cellular Downlink","authors":"Alex Fridman, J. Wildman, S. Weber","doi":"10.4108/icst.crowncom.2013.252376","DOIUrl":"https://doi.org/10.4108/icst.crowncom.2013.252376","url":null,"abstract":"In this paper, we consider cellular downlink communication from a set of fixed stations to a set of users with uncertain locations modeled by a spatial distribution. Each user is associated with a transmitter through association zones that maximize the signal-to-interference-plus-noise ratio (SINR) to that user. We define an expected spatial capacity metric that captures the expected rate summed over all of these zones. Network performance is measured using an expectation of the spatial capacity, subject to the assumed user density function. We examine the sensitivity of this performance metric to the number of stations and the number of orthogonal (frequency or time) channels, and present some counter-intuitive properties of this metric through illustrative examples, simulation, and optimization.","PeriodicalId":425536,"journal":{"name":"8th International Conference on Cognitive Radio Oriented Wireless Networks","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129533359","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
Analysis on the probability of electromagnetic compatibility in cognitive radio 认知无线电中电磁兼容概率分析
8th International Conference on Cognitive Radio Oriented Wireless Networks Pub Date : 2013-07-08 DOI: 10.4108/icst.crowncom.2013.252031
Kun Xu, Ming-xue Liao, Xiao-Xin He, Changwen Zheng, Hai-yu Ren
{"title":"Analysis on the probability of electromagnetic compatibility in cognitive radio","authors":"Kun Xu, Ming-xue Liao, Xiao-Xin He, Changwen Zheng, Hai-yu Ren","doi":"10.4108/icst.crowncom.2013.252031","DOIUrl":"https://doi.org/10.4108/icst.crowncom.2013.252031","url":null,"abstract":"How to determine an optimal topology is extremely important during the spectrum decision procedure for a cognitive radio network. In a multi-transceiver cognitive radio network, transceivers of a cognitive user will work in a parallel mode, by which the throughput of the network can be increased. Each cognitive user working in such mode should keep electromagnetic compatible (EMC) which will increase the time-complexity of spectrum decision dramatically. In order to solve this problem, an approximate decision model with lower time complexity is given. To evaluate the reliability of the approximate model, a method for EMC probability analysis is presented, which covers co-channel/adjacent channel interference, harmonic interference and intermodulation interference. With a network scene under development, both a theoretic EMC probability and a simulated estimation value are obtained and the good consistency between both results shows that the method is practicable in engineering.","PeriodicalId":425536,"journal":{"name":"8th International Conference on Cognitive Radio Oriented Wireless Networks","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129650732","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
On the capacity of Wi-Fi System in TV white space with aggregate interference constraint 基于聚合干扰约束的电视白空间Wi-Fi系统容量研究
8th International Conference on Cognitive Radio Oriented Wireless Networks Pub Date : 2013-07-08 DOI: 10.4108/icst.crowncom.2013.252022
Yanpeng Yang, Lei Shi, J. Zander
{"title":"On the capacity of Wi-Fi System in TV white space with aggregate interference constraint","authors":"Yanpeng Yang, Lei Shi, J. Zander","doi":"10.4108/icst.crowncom.2013.252022","DOIUrl":"https://doi.org/10.4108/icst.crowncom.2013.252022","url":null,"abstract":"In this paper, we present a quantitative assessment of the performance of a Wi-Fi like system in TV white space and compare it with the traditional Wi-Fi system in the ISM band. Particular emphasis is given to the constraint on the aggregate secondary interference on TV reception, which is regarded as the premise of the link throughput analysis that followed. Numerical evaluation is performed over different scenarios where the TV receive signal strength, number of unoccupied TV channels, user density are varied. Our results show that the primary interference constraint has only significant impact on the secondary system performance in rural scenario with low TV receive signal strength. In other cases, where higher transmit power does not guarantee better performance, the capacity of the system is limited by the secondary self-interference or collisions rather than the interference constraint. Therefore, efficient TV White Space utilization can be achieved by properly setting the secondary transmit power adaptive to different environments.","PeriodicalId":425536,"journal":{"name":"8th International Conference on Cognitive Radio Oriented Wireless Networks","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129956466","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: 17
Adaptive modulation in multi-user cognitive radio networks over fading channels 衰落信道上多用户认知无线网络的自适应调制
8th International Conference on Cognitive Radio Oriented Wireless Networks Pub Date : 2013-07-08 DOI: 10.4108/icst.crowncom.2013.252053
F. Foukalas, T. Khattab, H. Vincent Poor
{"title":"Adaptive modulation in multi-user cognitive radio networks over fading channels","authors":"F. Foukalas, T. Khattab, H. Vincent Poor","doi":"10.4108/icst.crowncom.2013.252053","DOIUrl":"https://doi.org/10.4108/icst.crowncom.2013.252053","url":null,"abstract":"In this paper, the performance of adaptive modulation in multi-user cognitive radio networks over fading channels is analyzed. Multi-user diversity is considered for opportunistic user selection among multiple secondary users. The analysis is obtained for Nakagami-m fading channels. Both adaptive continuous rate and adaptive discrete rate schemes are analysed in opportunistic spectrum access and spectrum sharing. Numerical results are obtained and depicted to quantify the effects of multiuser fading environments on adaptive modulation operating in cognitive radio networks.","PeriodicalId":425536,"journal":{"name":"8th International Conference on Cognitive Radio Oriented Wireless Networks","volume":"194 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116301880","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
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