2014 IEEE Globecom Workshops (GC Wkshps)最新文献_第5页

MLFS: A multiple layers share file system for cloud computing MLFS:用于云计算的多层共享文件系统

2014 IEEE Globecom Workshops (GC Wkshps) Pub Date : 2014-12-01 DOI: 10.1109/GLOCOMW.2014.7063413

Xiao Zhang, Wan Guo, Zhanhuai Li, Xiaonan Zhao, X. Qin

引用次数: 3

A unified approach for representing wireless channels using EM-based finite mixture of gamma distributions 使用基于em的有限混合伽马分布表示无线信道的统一方法

2014 IEEE Globecom Workshops (GC Wkshps) Pub Date : 2014-12-01 DOI: 10.1109/GLOCOMW.2014.7063565

Omar Alhussein, S. Muhaidat, Jie Liang, Paul Yoo

引用次数: 9

Dynamic resource allocation for video transcoding with QoS guaranteeing in cloud-based DASH system 基于云的DASH系统中具有QoS保证的视频转码动态资源分配

2014 IEEE Globecom Workshops (GC Wkshps) Pub Date : 2014-12-01 DOI: 10.1109/GLOCOMW.2014.7063421

Yongyi Ran, Youkang Shi, E. Yang, Shuangwu Chen, Jian Yang

{"title":"Dynamic resource allocation for video transcoding with QoS guaranteeing in cloud-based DASH system","authors":"Yongyi Ran, Youkang Shi, E. Yang, Shuangwu Chen, Jian Yang","doi":"10.1109/GLOCOMW.2014.7063421","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2014.7063421","url":null,"abstract":"Due to diverse network conditions and heterogeneous devices, there may be various video demands with different video qualities and formats from the client side. Compared to keeping all necessary copies for the same video, video transcoding in real-time should be an essential solution. The complex nature of video transcoding enables cloud computing to be uniquely suitable for dynamically providing transcoding resource. However, due to the fluctuation and uncertainty of the future transcoding demand, it is still a challenge to dynamically determine the optimal resource allocation to save cost while guaranteeing the Quality of Service (QoS). Overload may result in the transcoding jitter and increase the lateness which directly affects video freezes while over-provisioning naturally increases the cost. To address this problem, in this paper, by defining the transcoding jitter probability as a metric of QoS, we proposed a dynamic resource allocation algorithm based on the large deviation principle, which is capable of proactive calculating the optimal number of transcoding nodes for the upcoming transcoding demand subject to the transcoding jitter probability below a desired threshold. Finally, the experiments are performed on a cloud-based prototype system to show the attainable performance of the proposed resource allocation algorithm and verify that the proposed algorithm can make a good tradeoff between cost saving and QoS guaranteeing.","PeriodicalId":354340,"journal":{"name":"2014 IEEE Globecom Workshops (GC Wkshps)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127798437","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: 8

Physical-layer secret key generation with untrusted relays 使用不可信中继生成物理层密钥

2014 IEEE Globecom Workshops (GC Wkshps) Pub Date : 2014-12-01 DOI: 10.1109/GLOCOMW.2014.7063627

C. Thai, Jemin Lee, Chi Cheng, Tony Q. S. Quek

引用次数: 11

Jammer placement to partition wireless network 干扰器放置分区无线网络

2014 IEEE Globecom Workshops (GC Wkshps) Pub Date : 2014-12-01 DOI: 10.1109/GLOCOMW.2014.7063644

Jixin Feng, Xin Li, E. Pasiliao, J. Shea

{"title":"Jammer placement to partition wireless network","authors":"Jixin Feng, Xin Li, E. Pasiliao, J. Shea","doi":"10.1109/GLOCOMW.2014.7063644","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2014.7063644","url":null,"abstract":"Wireless communication systems are susceptible to jamming attacks, and the use of unmanned vehicles brings new opportunities for coordinated jamming attacks. At the same time, systems of autonomous vehicles that coordinate their movements over a wireless network may be particularly vulnerable to jamming attacks that disrupt the control information. Much research has been conducted on how to efficiently jam single communication links and how to protect such links from jamming. However, less research has focused on problems of jamming attacks on the overall network. In this paper, we consider the problem of determining how to efficiently position jammers so as to partition a wireless network. The communication network is represented as a graph with the vertices representing the radios, and the edges representing the communication links. Although there has been extensive research into the problem of efficiently partitioning a graph via edge separators, the action of a jammer in a wireless network is more closely analogous to blocking reception at one or more radios, which may be modeled as partitioning a graph via node separators. We formulate several optimization problems for jammer placement. Since the optimal solution to these problems are computationally complex, we develop suboptimal solutions using spectral partitioning followed by greedy jammer placement and also a harmony search. The results show that these algorithms offer a tradeoff between complexity and performance. In the scenarios where we were able to compare performance with the optimal solution, the harmony search algorithm offered performance close to that of the optimal solution while requiring a much lower complexity.","PeriodicalId":354340,"journal":{"name":"2014 IEEE Globecom Workshops (GC Wkshps)","volume":"227 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131787032","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

Low-complexity multiuser detection in massive spatial modulation MIMO 大规模空间调制MIMO中的低复杂度多用户检测

2014 IEEE Globecom Workshops (GC Wkshps) Pub Date : 2014-12-01 DOI: 10.1109/GLOCOMW.2014.7063528

Shengchu Wang, Yunzhou Li, Jing Wang, Ming Zhao

{"title":"Low-complexity multiuser detection in massive spatial modulation MIMO","authors":"Shengchu Wang, Yunzhou Li, Jing Wang, Ming Zhao","doi":"10.1109/GLOCOMW.2014.7063528","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2014.7063528","url":null,"abstract":"In this paper, we research the multiuser detection (MUD) in a new massive Spatial Modulation Multiple Input Multiple Output (SM-MIMO) system, where the Base Station (BS) is equipped with massive antennas, and every User Equipment (UE) has multiple Transmit Antennas (TAs) but only one Radio-Frequency (RF) chain. In the uplink, UEs transmit data to the BS over frequency selective channels by the Cyclic-Prefix Single-Carrier (CP-SC) SM. We construct a new Generalized Approximate Message Passing Detector (GAMPD), and analyzes its mean square error performance theoretically by the State Evolution (SE) tool. By exploiting both the prior probability distribution and sparsity of the transmitted signal, GAMPD shows superior detection performances and works well even when the number of TAs at the UEs is larger than the number of BS antennas. GAMPD calls for parallelized matrix-vector multiplication as the most complex operation, so it has low computational complexity and is suitable for hardware implementation. Simulation results show that GAMPD outperforms the linear detectors significantly, and is analyzed by SE successfully. In addition, compared to the classical massive MIMO, massive SM-MIMO shows better detection performance and higher spectral efficiency.","PeriodicalId":354340,"journal":{"name":"2014 IEEE Globecom Workshops (GC Wkshps)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115033166","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

Wavelength dependence of a fiber-bundle based FSO link 基于光纤束的FSO链路的波长依赖性

2014 IEEE Globecom Workshops (GC Wkshps) Pub Date : 2014-12-01 DOI: 10.1109/GLOCOMW.2014.7063480

P. Lopresti, N. Hutchins, Steven Kohrmann, M. F. Babelli, H. Refai

引用次数: 7

Clean relaying in cognitive radio networks with variational distance secrecy constraint 变距离保密约束下认知无线网络中的干净中继

2014 IEEE Globecom Workshops (GC Wkshps) Pub Date : 2014-12-01 DOI: 10.1109/GLOCOMW.2014.7063619

Pin-Hsun Lin, Frederic Gabry, R. Thobaben, Eduard Axel Jorswieck, M. Skoglund

{"title":"Clean relaying in cognitive radio networks with variational distance secrecy constraint","authors":"Pin-Hsun Lin, Frederic Gabry, R. Thobaben, Eduard Axel Jorswieck, M. Skoglund","doi":"10.1109/GLOCOMW.2014.7063619","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2014.7063619","url":null,"abstract":"In this paper we investigate the cooperative secure communication in a four-node cognitive channel where the secondary receiver is treated as a potential eavesdropper with respect to the primary transmission with variational distance constraint. And the primary user's secrecy rate is required to be unchanged. We propose the clean relaying with the cooperative jamming scheme to achieve this goal, where the secondary transmitter splits its transmitting phase into two non-overlapped intervals after successfully decoding the primary message. Due to the considered secrecy metric, we resort to the information spectrum method, to derive the achievable secrecy rates for the primary user. Then we formulate the secondary user's rate maximization problem over the power allocation and time splitting at the cognitive transmitter under the constraint that primary user's secrecy rate is unchanged. Numerical results show that the secondary transmitter can choose clean relaying or pure cooperative jamming according to the relative positions of the nodes to achieve better performance than the one without any clean phase.","PeriodicalId":354340,"journal":{"name":"2014 IEEE Globecom Workshops (GC Wkshps)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123178515","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

Boosting capacity through small cell data offloading: A comparative performance study of LTE femtocells and Wi-Fi 通过小蜂窝数据卸载提高容量:LTE飞蜂窝和Wi-Fi的性能比较研究

2014 IEEE Globecom Workshops (GC Wkshps) Pub Date : 2014-12-01 DOI: 10.1109/GLOCOMW.2014.7063603

Andra M. Voicu, L. Simić, M. Petrova

{"title":"Boosting capacity through small cell data offloading: A comparative performance study of LTE femtocells and Wi-Fi","authors":"Andra M. Voicu, L. Simić, M. Petrova","doi":"10.1109/GLOCOMW.2014.7063603","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2014.7063603","url":null,"abstract":"Due to the significant increase in mobile data traffic volume during the last few years, offloading techniques have been considered for alleviating the traffic load from cellular networks. Two principal small cell offloading solutions are LTE femtocells and Wi-Fi. Femtocells are low power user-deployed LTE base stations that overlay the macro-cellular network and share its licensed spectrum, whereas Wi-Fi devices operate in unlicensed bands using the distributed CSMA/CA MAC protocol to coordinate neighbouring transmissions. Given the fundamentally different spectrum use regulations, MAC, and PHY layer capabilities of these two technologies, the resulting interference environments of the respective small cell networks are significantly different. It is thus not trivially obvious which offloading solution realistically provides a better and future-proof capacity extension for service providers. In this paper we present a thorough system-level comparative study of IEEE 802.1 In Wi-Fi against LTE femtocell performance for a range of representative network densities and deployment scenarios, considering realistic propagation effects, multiple interference sources, and several resource allocation schemes. Our results show that in low density suburban and rural scenarios the high spectral efficiency of LTE femtocells yields a higher throughput than Wi-Fi, but that the CSMA/CA MAC protocol enables Wi-Fi to outperform LTE femtocells in dense urban scenarios, where the need for extra capacity is most urgent. We show that future high density heterogeneous networks may be best served by a new hybrid small cell offloading solution, combining the superior PHY of LTE and the distributed co-tier interference coordination afforded by the MAC of Wi-Fi.","PeriodicalId":354340,"journal":{"name":"2014 IEEE Globecom Workshops (GC Wkshps)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123690414","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

Enable concurrent transmissions with beamforming for broadband wireless access in CSMA/CA-based WLANs 在基于CSMA/ ca的wlan中，通过波束成形实现宽带无线接入的并发传输

2014 IEEE Globecom Workshops (GC Wkshps) Pub Date : 2014-12-01 DOI: 10.1109/GLOCOMW.2014.7063576

Zhaohan Jia, Xin He, F. Li

引用次数: 2