2017 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN)最新文献_第4页

A standard method for modeling spectrum consumption 一种模拟频谱消耗的标准方法

2017 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN) Pub Date : 2017-03-01 DOI: 10.1109/DySPAN.2017.7920772

Carlos E. Caicedo Bastidas, A. Rennier, A. Lackpour, R. Schrage, J. Stine, M. Sherman, M. Kokar

{"title":"A standard method for modeling spectrum consumption","authors":"Carlos E. Caicedo Bastidas, A. Rennier, A. Lackpour, R. Schrage, J. Stine, M. Sherman, M. Kokar","doi":"10.1109/DySPAN.2017.7920772","DOIUrl":"https://doi.org/10.1109/DySPAN.2017.7920772","url":null,"abstract":"Wireless services that rely on Dynamic Spectrum Access (DSA) or spectrum sharing mechanisms require a well-defined means to communicate how each device or system is using spectrum resources in a particular environment or situation so that the devices that receive such information can make rational decisions on the possible use of the spectrum. Spectrum consumption models (SCMs) address this issue by providing a means to capture the spectral, spatial, and temporal characteristics of spectrum usage for any specific transmitter, receiver, system, or collection of systems. Since 2012 the 1900.5 working group of the IEEE Dynamic Spectrum Access Networks Standardization Committee (DySPAN-SC) has been working on the IEEE 1900.5.2 standard which defines a data model for SCMs and procedures to arbitrate compatibility among combinations of RF devices and/or systems that have expressed the boundaries of their spectrum use with SCMs. This poster provides an overview of SCMs with a focus on example use cases related to current spectrum management scenarios (i.e. SAS, AWS-3, etc.) to illustrate how SCMs can enable innovative and efficient spectrum use interactions in the near future.","PeriodicalId":221877,"journal":{"name":"2017 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN)","volume":"2013 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116958495","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

Probabilistic reasoning and risk-constrained dynamic spectrum access 概率推理与风险约束动态频谱接入

2017 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN) Pub Date : 2017-03-01 DOI: 10.1109/DySPAN.2017.7920795

Todd W. Martin, Kuo-Chu Chang

{"title":"Probabilistic reasoning and risk-constrained dynamic spectrum access","authors":"Todd W. Martin, Kuo-Chu Chang","doi":"10.1109/DySPAN.2017.7920795","DOIUrl":"https://doi.org/10.1109/DySPAN.2017.7920795","url":null,"abstract":"Uncertainties regarding wireless propagation environments pose challenges for spectrum management in general and specifically hinder the implementation of dynamic spectrum sharing systems. Without the ability to reliably evaluate interference risks, spectrum sharing policies specify spectrum access behaviors such as exclusion zones and maximum transmit powers based on risk thresholds applied to statistical results from propagation models and measurements. Because the models can contain significant levels of uncertainty, establishing behavior limits for low interference risk necessarily results in significant spectrum access inefficiencies. It is only by reducing the degree of uncertainty that risk thresholds can be maintained while increasing spectrum access efficiency. Probabilistic reasoning applied to dynamic spectrum sharing systems provides potential to increase spectrum sharing by reducing situational uncertainty. Further, probabilistic reasoning approaches enable risk-constrained spectrum access, a concept in which regulators and spectrum users establish spectrum access rules defining acceptable levels of interference and spectrum access risks. This paper develops the concepts and underlying theory of probabilistic reasoning and risk-constrained spectrum access for spectrum sharing. It further presents simulation results showing that situation-specific probabilistic reasoning combined with risk-constrained spectrum access potentially enables greater spectrum sharing. Specifically, probabilistic reasoning with real-time spectrum sensing is shown to greatly reduce situational uncertainty, which then results in better interference prevention and more effective spectrum sharing as measured by user capacity and overall network density.","PeriodicalId":221877,"journal":{"name":"2017 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114967514","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

Coverage and rate analysis of super Wi-Fi networks using stochastic geometry 基于随机几何的超级Wi-Fi网络覆盖率和速率分析

2017 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN) Pub Date : 2017-03-01 DOI: 10.1109/DySPAN.2017.7920794

N. Krishnan, G. Sridharan, I. Seskar, N. Mandayam

{"title":"Coverage and rate analysis of super Wi-Fi networks using stochastic geometry","authors":"N. Krishnan, G. Sridharan, I. Seskar, N. Mandayam","doi":"10.1109/DySPAN.2017.7920794","DOIUrl":"https://doi.org/10.1109/DySPAN.2017.7920794","url":null,"abstract":"Recent regulatory changes proposed by the Federal Communications Commission (FCC) permitting unlicensed use of television white space (TVWS) channels present new opportunities for designing wireless networks that make efficient use of this spectrum. The favorable propagation characteristics of these channels and their widespread availability, especially in rural areas, make them well-suited for providing broadband services in sparsely populated regions where economic factors hinder deployment of such services on licensed spectrum. In this context, this paper explores the deployment of an outdoor Wi-Fi-like network operating in TVWS channels, referred to commonly as a Super Wi-Fi network. Since regulations governing unlicensed use of these channels allow (a) mounting fixed devices up to a height of 30 m and operation at transmit powers of up to 4 W EIRP, and (b) operation at transmit powers of up to 100 mW EIRP for portable devices, such networks can provide extended coverage and higher rates than traditional Wi-Fi networks. However, these gains are subject to the viability of the uplink from the portable devices (clients) to the fixed devices (access points (AP)) because of tighter restrictions on transmit power of clients compared to APs. This paper leverages concepts from stochastic geometry to study the performance of such networks with specific focus on the effect of (a) transmit power asymmetry between APs and clients and its impact on uplink viability and coverage, and (b) the interplay between height and transmit power of APs in determining the network throughput. Such an analysis reveals that (a) maximum coverage of no more than 700 m is obtained even when APs are deployed at 30 m height, and (b) operating APs at transmit power of more than 1 W is beneficial only at sparse deployment densities when rate is prioritized over coverage.","PeriodicalId":221877,"journal":{"name":"2017 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN)","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126256185","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

Geographic information system benefits for the radio frequency interference monitoring system lifecycle 地理信息系统有利于射频干扰监测系统的全生命周期

2017 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN) Pub Date : 2017-03-01 DOI: 10.1109/DySPAN.2017.7920767

Rachel Soobitsky, Steven Grippando

引用次数: 1

An agile OFDM cognitive radio engine 一个灵活的OFDM认知无线电引擎

2017 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN) Pub Date : 2017-03-01 DOI: 10.1109/DySPAN.2017.7920783

Stefanos Papadakis, M. Surligas, Kostis Triantafyllakis, George Vardakis, A. Gkiolias, Nikolaos Karamolegos, Antonis Makrogiannakis

引用次数: 1

Measurement procedures for design and enforcement of harm claim thresholds 损害索赔阈值的设计和执行的测量程序

2017 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN) Pub Date : 2017-03-01 DOI: 10.1109/DySPAN.2017.7920779

Janne Riihijärvi, P. Mähönen, J. P. D. Vries

{"title":"Measurement procedures for design and enforcement of harm claim thresholds","authors":"Janne Riihijärvi, P. Mähönen, J. P. D. Vries","doi":"10.1109/DySPAN.2017.7920779","DOIUrl":"https://doi.org/10.1109/DySPAN.2017.7920779","url":null,"abstract":"Harm claim thresholds (HCTs) are a promising approach for regulators to specify interference limits in a technology-neutral fashion, and a useful parameter spectrum access systems can use to manage the aggregate interference caused by transmitters they control. However, existing literature provides very little guidance how HCTs should be set and enforced. In this paper we propose a detailed regulatory framework for gathering and processing of measurement data for enforcing and setting harm claim thresholds. We introduce the central concepts of stratification and weighting of measurement data, and show their importance in ensuring representativeness of measurements and enabling robust estimation of statistical confidence on results. For deriving HCT thresholds from measurements, we propose additional representativeness criteria that a regulator should apply to avoid underestimation of field strength levels related to existing wireless services. We demonstrate application of our proposed framework using an extensive drive test data set, and show that the chosen HCT percentile is critical in determining how much data needs to be gathered for enforcement. We also discuss the various design choices and parameters needed by our framework, and show through examples how they can be derived in cooperation with the different stakeholders. The developed framework has several applications beyond HCT enforcement, some of which are briefly described in the paper.","PeriodicalId":221877,"journal":{"name":"2017 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122463559","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

COTA: Channel occupancy time adaptation for LTE in unlicensed spectrum COTA: LTE在非授权频谱中的信道占用时间调整

2017 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN) Pub Date : 2017-03-01 DOI: 10.1109/DySPAN.2017.7920786

Kangjin Yoon, Taejun Park, Jihoon Kim, Weiping Sun, Sunwook Hwang, Ingab Kang, Sunghyun Choi

{"title":"COTA: Channel occupancy time adaptation for LTE in unlicensed spectrum","authors":"Kangjin Yoon, Taejun Park, Jihoon Kim, Weiping Sun, Sunwook Hwang, Ingab Kang, Sunghyun Choi","doi":"10.1109/DySPAN.2017.7920786","DOIUrl":"https://doi.org/10.1109/DySPAN.2017.7920786","url":null,"abstract":"LTE operation in unlicensed spectrum is emerging as a promising technology in achieving higher data rate with LTE since ultra-wide unlicensed spectrum, e.g., about 500 MHz at 5–6 GHz range, is available in most countries. Recently, 3GPP has finalized standardization of licensed assisted access (LAA) for LTE operation in 5 GHz unlicensed spectrum, which has been a playground only for Wi-Fi. LAA defines downlink transmission over 5 GHz spectrum, where channel sensing, i.e., listen before talk (LBT) operation similar to Wi-Fi medium access control (MAC) protocol, is performed before each transmission of eNodeB. LAA has a fixed 8 ms maximum channel occupancy time (COT), which is the maximum continuous transmission time after channel sensing, while Wi-Fi may transmit for much shorter time duration. As a result, when Wi-Fi coexists with LAA, Wi-Fi airtime and throughput can be much less than those achieved when Wi-Fi coexists with another Wi-Fi. To guarantee fair airtime and improve throughput of Wi-Fi, we propose a COT adaptation (COTA) algorithm, which observes Wi-Fi aggregate MAC protocol data unit (A-MPDU) frames and matches LAA's COT to the duration of A-MPDU frames. Moreover, COTA detects saturation of Wi-Fi traffic and adjusts COT only if Wi-Fi traffic is saturated. We prototype saturation detection algorithm of COTA with commercial off-the-shelf Wi-Fi device and show that COTA detects saturation of Wi-Fi networks accurately. Through ns-3 simulations, we demonstrate that COTA achieves up to 153% Wi-Fi throughput gain while providing airtime fairness between LAA and Wi-Fi.","PeriodicalId":221877,"journal":{"name":"2017 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114336365","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

The impact of short-term permits on competition in unlicensed spectrum 短期牌照对无牌频谱竞争的影响

2017 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN) Pub Date : 2017-03-01 DOI: 10.1109/DySPAN.2017.7920790

Xu Wang, R. Berry

{"title":"The impact of short-term permits on competition in unlicensed spectrum","authors":"Xu Wang, R. Berry","doi":"10.1109/DySPAN.2017.7920790","DOIUrl":"https://doi.org/10.1109/DySPAN.2017.7920790","url":null,"abstract":"Motivated in part by the success of WiFi, there is much interest in expanding the amount of spectrum available for unlicensed access, even at lower “prime” frequencies. Having easy access to new spectrum can provide a means of increasing competition in the wireless service market and promote the development of new technologies. On the other hand, potential risks are that such spectrum may have a higher risk of becoming congested and can make it more difficult for service providers (SPs) to differentiate their services from each other. Indeed, several papers have shown that when SPs compete on price in such a setting, the price can get competed to zero. This may lead to SP's being unwilling to invest and offer service. Here, we consider a different market structure, in which SPs must buy short-term permits from a regulator in order use the spectrum band. We argue that under such an approach, the SPs are better modeled as competing on quantity (number of permits) instead of price. We analyze a model for such a market and show that in this case, multiple SPs can maintain a non-zero profit. Moreover, there is a range of bandwidth over which this achieves a higher welfare than price competition even accounting for the additional permit cost charged to the SPs.","PeriodicalId":221877,"journal":{"name":"2017 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127824687","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

Location privacy from dummy devices in database-coordinated spectrum sharing 数据库协调频谱共享中虚拟设备的位置隐私

2017 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN) Pub Date : 2017-03-01 DOI: 10.1109/DySPAN.2017.7920796

Nirajan Rajkarnikar, J. Peha, Ana Aguiar

{"title":"Location privacy from dummy devices in database-coordinated spectrum sharing","authors":"Nirajan Rajkarnikar, J. Peha, Ana Aguiar","doi":"10.1109/DySPAN.2017.7920796","DOIUrl":"https://doi.org/10.1109/DySPAN.2017.7920796","url":null,"abstract":"One way to make more spectrum available is through white space sharing, where secondary spectrum users are allowed to transmit from any location except inside exclusion zones (EZs) that are drawn around primary spectrum users (PUs). However, EZ boundaries reveal the locations of PUs, and for some devices, location privacy is extremely important. Location privacy can be improved by increasing the area blocked inside EZs, but this decreases spectrum utilization efficiency. This paper derives a Pareto optimal strategy that builds on two such approaches: generating dummy PUs and creating EZs around them, and making EZs larger than needed for interference protection alone. We find that in many circumstances, including cases where an attacker threatens a jamming attack, the optimal strategy is to maximize the number of dummy PUs while making EZs as small as possible. In the remaining circumstances, the optimal strategy is to generate no dummy EZs. We derive the Pareto optimal results achieved by using whichever of these strategies is best for given circumstances, and show that the results are far superior to those achieved with some previously proposed algorithms. Moreover, with our approach, even a small increase in the amount of area blocked from secondary use can greatly improve location privacy for PUs, although as more and more area is blocked, there are diminishing returns.","PeriodicalId":221877,"journal":{"name":"2017 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126798663","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

Impact of asynchronous transmissions in noncontiguous OFDMA 非连续OFDMA中异步传输的影响

2017 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN) Pub Date : 2017-03-01 DOI: 10.1109/DySPAN.2017.7920788

Ratnesh Kumbhkar, G. Sridharan, N. Mandayam, I. Seskar, S. Kompella

{"title":"Impact of asynchronous transmissions in noncontiguous OFDMA","authors":"Ratnesh Kumbhkar, G. Sridharan, N. Mandayam, I. Seskar, S. Kompella","doi":"10.1109/DySPAN.2017.7920788","DOIUrl":"https://doi.org/10.1109/DySPAN.2017.7920788","url":null,"abstract":"Multiple point-to-point (p2p) communication links that share noncontiguously available spectrum via noncontiguous orthogonal frequency division multiple access (NC-OFDMA) are considered in this paper. NC-OFDMA divides the spectrum into orthogonal subcarriers and assigns nonoverlapping subsets of these subcarriers to each of the links. Such a setup is motivated by the need for dynamic and opportunistic access of a large pool of spectrum that is fragmented due to the presence of incumbent transmissions. The transmissions of the p2p links are assumed to be asynchronous, i.e., the start and end of the NC-OFDM symbol is not time synchronized across the links. In such a setting, this paper studies the inter-carrier-interference (ICI) arising from the loss of orthogonality between the subcarriers due to (a) the asynchronous nature of the communications and (b) the frequency offset between the links. An analytical characterization of this ICI reveals that in the absence of transmit power control, the impact of this ICI can be severe enough to disable the concurrent transmissions of the other p2p links. Experimental results using a Universal Software Radio Peripheral (USRP) platform validate our analysis and show that the negative effects of asynchronous transmission which are particularly significant at high SNR. To remedy this, a decentralized synchronization scheme is presented wherein beacons appended to the transmitted signal are used to enable timing coordination between two NC-OFDM links, thereby eliminating the ICI resulting from asynchronous transmission. Effectiveness of such a scheme is validated using experiments. In cases where such timing coordination cannot be enabled, our analysis is then used to provide guidelines on the choice of basic system parameters for the p2p links such as the number of contiguous subcarriers to be allocated to a link and length of guard band and range of operating SNRs to mitigate the effect of asynchronous NC-OFDM transmission.","PeriodicalId":221877,"journal":{"name":"2017 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN)","volume":"120 12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124484830","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