2012 IEEE International Symposium on Dynamic Spectrum Access Networks最新文献_第3页

Distributed TV spectrum allocation for cognitive cellular network under game theoretical framework 博弈论框架下认知蜂窝网络的分布式电视频谱分配

2012 IEEE International Symposium on Dynamic Spectrum Access Networks Pub Date : 2012-10-01 DOI: 10.1109/DYSPAN.2012.6478156

Di Li, J. Gross

{"title":"Distributed TV spectrum allocation for cognitive cellular network under game theoretical framework","authors":"Di Li, J. Gross","doi":"10.1109/DYSPAN.2012.6478156","DOIUrl":"https://doi.org/10.1109/DYSPAN.2012.6478156","url":null,"abstract":"This paper proposes efficient schemes for wireless cellular base stations to utilize TV white spectrum (such base stations referred to as white base stations - WBS), so that WBSes can provide good services to their end terminals without violating the incumbent TV services. In particular, we consider two complementary problems. On the one hand, given a set of TV stations and white base stations, maximum permitted transmit power levels on all channels for each base stations needs to be determined. By use of convex programming, we propose here an improved, centralized mechanism. On the other hand, once the maximum transmit powers are determined, each white base station needs to choose a channel with the maximal permitted power on that channel such that the resulting cell performance is improved. Allocating channels with nonidentical transmission power and asymmetric interference is formulated into congestion game for the first time, and an algorithm is derived thereafter which converges after a small number of iterations in simulation. However, the scheme requires geo information coupled with a radio map to decide at each WBS in a decentralized manner about the channel usage. We find that in comparison to several other decentralized schemes, our proposed approach first of all converges after a small number of iterations while on the other hand it is able to achieve the same network performance spending significantly lower transmit power.","PeriodicalId":224818,"journal":{"name":"2012 IEEE International Symposium on Dynamic Spectrum Access Networks","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124419925","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

Capacity of cellular networks deployed in TV White Space 在电视空白空间中部署的蜂窝网络容量

2012 IEEE International Symposium on Dynamic Spectrum Access Networks Pub Date : 2012-10-01 DOI: 10.1109/DYSPAN.2012.6478136

Torsten Dudda, T. Irnich

{"title":"Capacity of cellular networks deployed in TV White Space","authors":"Torsten Dudda, T. Irnich","doi":"10.1109/DYSPAN.2012.6478136","DOIUrl":"https://doi.org/10.1109/DYSPAN.2012.6478136","url":null,"abstract":"This paper investigates how suitable TV White Space (TVWS) is for use by cellular networks. Unlike in licensed bands, transmit power in TVWS is limited and considerable interference from TV towers exists. This suggests that evaluating TVWS only in terms of available bandwidth can be misleading, since performance of wireless networks in TVWS is likely lower than in the same amount of dedicated spectrum. We quantify TVWS at the example of Germany, using the European methodology developed in CEPT ECC SE 43. In the second step, we determine the performance of a cellular network operating in TVWS using a calibrated multi-cell and multi-user system level simulation tool. This way we also consider interference between TVWS users, which in previous TVWS studies has not been investigated in detail. Not all locally available TV channels are equally useful. We thus compare different channel selection algorithms a TVWS operator could apply to select from the set of available TVWS channels. We found that while the available spectrum for TVWS usage is in theory quite high, its actual utility strongly depends on the channel selection method and the requirements it is based on. Due to the high interference from TV towers, cellular networks based on frequency re-use one (like LTE) have difficulties finding channels that allow good performance at the cell edge. The inner part of a cell can however considerably benefit from TVWS. This indicates that for cellular networks TVWS is primarily suitable for traffic offloading and spotty coverage rather than for building large contiguous coverage networks.","PeriodicalId":224818,"journal":{"name":"2012 IEEE International Symposium on Dynamic Spectrum Access Networks","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129325916","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: 34

Optimizing power limits for white space devices under a probability constraint on aggregated interference 在聚合干扰的概率约束下优化空白空间器件的功率限制

2012 IEEE International Symposium on Dynamic Spectrum Access Networks Pub Date : 2012-10-01 DOI: 10.1109/DYSPAN.2012.6478131

Y. Selén, Jonas Kronander

{"title":"Optimizing power limits for white space devices under a probability constraint on aggregated interference","authors":"Y. Selén, Jonas Kronander","doi":"10.1109/DYSPAN.2012.6478131","DOIUrl":"https://doi.org/10.1109/DYSPAN.2012.6478131","url":null,"abstract":"This paper presents a solution to the problem of setting power limits for white space devices sharing a spectrum band. It is desired to utilize the available white space efficiently while also protecting the primary system from harmful interference. Power limits are set individually for each white space device by maximizing a joint utility measure, e.g., sum capacity. The aggregated interference caused by the white space devices to the primary system is controlled by constraining the probability of harmful aggregated interference to be below a defined threshold. First, the problem of single white space channel sharing is given a mathematical formulation in the form of an optimization problem. Under the common assumption of lognormal fading the distribution of the aggregate interference is unknown and the optimization problem becomes infeasible to solve. A computationally feasible approximation of the initial optimization problem is formulated in which the distribution of the aggregated interference is modeled using the Fenton-Wilkinson approximation. We derive the expressions needed for efficiently solving the simplified optimization problem with a numerical solver, including the gradients of the constraint and objective functions. We show by means of simulations that the solutions to the simplified optimization problem typically fulfill the original probability constraints with good precision. Further, the resulting sum-capacity values are higher than what can typically be obtained by using fixed margins for coping with the aggregate interference. We also discuss multi channel extensions which are able to handle not only interference to primary systems operating on adjacent channels, but also the joint problem of selecting the channels for white space operation and deciding the associated power limits.","PeriodicalId":224818,"journal":{"name":"2012 IEEE International Symposium on Dynamic Spectrum Access Networks","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117121143","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: 19

Eigenvalue-based signal detection in cognitive femtocell networks using a decentralized Lanczos algorithm 基于特征值的认知飞蜂窝网络信号检测中分散式Lanczos算法

2012 IEEE International Symposium on Dynamic Spectrum Access Networks Pub Date : 2012-10-01 DOI: 10.1109/DYSPAN.2012.6478146

F. Penna, S. Stańczak

引用次数: 2

Should primaries be considered victims or police? 初选应该被视为受害者还是警察?

2012 IEEE International Symposium on Dynamic Spectrum Access Networks Pub Date : 2012-10-01 DOI: 10.1109/DYSPAN.2012.6478160

K. Woyach, A. Sahai

{"title":"Should primaries be considered victims or police?","authors":"K. Woyach, A. Sahai","doi":"10.1109/DYSPAN.2012.6478160","DOIUrl":"https://doi.org/10.1109/DYSPAN.2012.6478160","url":null,"abstract":"This paper investigates spectrum-jail-based enforcement from the perspective of a primary. We first treat the primary as a victim, to understand the expense of protecting primaries in different situations. In all cases, the overhead can be limited by reducing the rate of wrongful convictions. We then allow the primary to participate in its own protection - ideally, we want the primary to report interference but otherwise operate as though the secondary were not present. However, the primary can report interference when there is none; it can also transmit “gibberish” to claim more than its required transmit time. Because the primary will be affected in some way by secondary presence, it unfortunately has incentive to use these behaviors to kick the secondary out of the band. Crying wolf, an obviously undesirable behavior, is too easily done if reporting is free. So, it must be countered by making reporting interference sufficiently expensive. “Gibberish,” on the other hand, requires more serious thought because it is not easily deterred and may in fact be useful in encouraging compatible subcontracting. Finally, we show that both primary and secondary do better with better coexistence strategies, so the jail system gives natural incentives for better receiver designs, registration in a database, or other approaches for making coexistence simpler.","PeriodicalId":224818,"journal":{"name":"2012 IEEE International Symposium on Dynamic Spectrum Access Networks","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123358591","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

Business model analysis for spectrum sharing with the spectrum broker 与频谱代理共享频谱的业务模型分析

2012 IEEE International Symposium on Dynamic Spectrum Access Networks Pub Date : 2012-10-01 DOI: 10.1109/DYSPAN.2012.6478161

M. Szydelko

引用次数: 12

LTE signal classification and center frequency detection without Priori information 无先验信息的LTE信号分类和中心频率检测

2012 IEEE International Symposium on Dynamic Spectrum Access Networks Pub Date : 2012-10-01 DOI: 10.1109/DYSPAN.2012.6478153

T. Erpek, K. Steadman, Ram Krishnan, Qiao Chen

{"title":"LTE signal classification and center frequency detection without Priori information","authors":"T. Erpek, K. Steadman, Ram Krishnan, Qiao Chen","doi":"10.1109/DYSPAN.2012.6478153","DOIUrl":"https://doi.org/10.1109/DYSPAN.2012.6478153","url":null,"abstract":"Creating a cognitive Long Term Evolution (LTE) network on an arbitrary frequency requires an LTE specific classifier. This paper explains a novel LTE signal classification method that requires no a priori information about the signal parameters including its frequency. The classification method consists of multiple steps. The first step is using a correlation-based discriminator which exploits the characteristics of the LTE cyclic prefix, cell-specific reference symbol sequence and physical broadcast channel. A set of candidate LTE signal frequencies and confidence factors are determined at the end of this step. The candidate frequency set is narrowed down in the second step using the confidence factors. The third step is to estimate the center frequency of the LTE signal. This step relies on known signal characteristics including the synchronization sequences. The time-domain LTE signal is represented in frequency and time grids and two-dimensional cross-correlation is performed. The algorithms were simulated and then implemented on a real-time platform. The results show that an LTE signal with signal-to-noise ratio (SNR) of less than 0 dB can be classified within 0.23 sec.","PeriodicalId":224818,"journal":{"name":"2012 IEEE International Symposium on Dynamic Spectrum Access Networks","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130703717","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

Seeing the bigger picture: Context-aware regulations 看到更大的图景:环境感知法规

2012 IEEE International Symposium on Dynamic Spectrum Access Networks Pub Date : 2012-10-01 DOI: 10.1109/DYSPAN.2012.6478112

Kate Harrison, A. Sahai

{"title":"Seeing the bigger picture: Context-aware regulations","authors":"Kate Harrison, A. Sahai","doi":"10.1109/DYSPAN.2012.6478112","DOIUrl":"https://doi.org/10.1109/DYSPAN.2012.6478112","url":null,"abstract":"The TV whitespaces represent an incredible opportunity for innovation. Along with this opportunity come significant challenges: the whitespaces are very heterogeneous in terms of channel availability as well as quality. This poses a challenge to anyone wishing to achieve uniform or even similar quality of service nationwide. In this paper, we consider using heterogeneity in the emissions limits to counteract the inherent heterogeneity of the whitespaces, ultimately resulting in a more homogeneous quality of service for secondary users. However, heterogeneity cannot be added to regulations in a haphazard manner. Rather, it must be carefully crafted as a result of looking at the bigger picture and fully exploiting the capabilities of databases. Databases should not be seen as a necessary evil but rather as an exciting opportunity for improvement and innovation. In particular, rather than being viewed as a simple repository of data, the “database” can be viewed as a cloud-based entity that reports the result of a default kind of Coasian-bargaining that could be expected to occur among frequency-agile radios. We conclude by showing a few small examples of positive heterogeneity as it applies to real-world data for the TV whitespaces in parts of the United States.","PeriodicalId":224818,"journal":{"name":"2012 IEEE International Symposium on Dynamic Spectrum Access Networks","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133748206","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: 14

Opportunistic spectrum access in TVWS: A comparative coexistence study for LTE TVWS中的机会频谱接入:LTE的比较共存研究

2012 IEEE International Symposium on Dynamic Spectrum Access Networks Pub Date : 2012-10-01 DOI: 10.1109/DYSPAN.2012.6478152

Christoph Thein, Martin Fuhrwerk, J. Peissig, M. Schellmann

{"title":"Opportunistic spectrum access in TVWS: A comparative coexistence study for LTE","authors":"Christoph Thein, Martin Fuhrwerk, J. Peissig, M. Schellmann","doi":"10.1109/DYSPAN.2012.6478152","DOIUrl":"https://doi.org/10.1109/DYSPAN.2012.6478152","url":null,"abstract":"In this paper, we study the coexistence issues of LTE systems operating in the TV white spaces. The study includes a proposal for an appropriate system design as well as a discussion on the LTE system's self-configurability to avoid potential interference to other systems when the resource allocation is made flexible. This is evaluated in terms of achievable PHY-layer throughput and block error rates (BLER) in coexistence scenarios with digital terrestrial TV (DTT) and wireless microphones (WM). Furthermore, the study makes exclusive comparisons between the current LTE PHY interface of cyclic-prefix OFDM (CP-OFDM) and one of its alternatives, the offset-QAM OFDM (OQAM-OFDM) scheme. Therefore, the aspects of interference robustness, system flexibility and complexity issues are considered. The main outcome of this study is that an LTE system based on OQAM-OFDM offers higher data rates and conforms better to potential regulatory rules than the current CP-OFDM implementation. The OQAM-OFDM scheme is significantly more robust and delivers higher data rates, in particular for the coexistence with narrow-band services. Finally, through the complexity analysis, we conclude that such performance-complexity trade-off may be reasonable in the future as the overall system complexity of OQAM-ODFM is only incremental.","PeriodicalId":224818,"journal":{"name":"2012 IEEE International Symposium on Dynamic Spectrum Access Networks","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134604839","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

TV white space databases: Algorithms for the calculation of maximum permitted radiated power levels 电视空白数据库。计算最大允许辐射功率水平的算法

2012 IEEE International Symposium on Dynamic Spectrum Access Networks Pub Date : 2012-10-01 DOI: 10.1109/DYSPAN.2012.6478179

V. Petrini, H. Karimi

引用次数: 27