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2016 IEEE International Conference on Communications (ICC)最新文献

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Localization algorithm design and performance analysis in probabilistic LOS/NLOS environment 概率LOS/NLOS环境下定位算法设计及性能分析
Pub Date : 2016-05-22 DOI: 10.1109/ICC.2016.7510963
Xiufang Shi, Guoqiang Mao, Zaiyue Yang, Jiming Chen
Non-line-of-sight (NLOS) propagation, which widely exists in wireless systems, will degrade the performance of wireless positioning system if it is not taken into consideration in the localization algorithm design. The 3rd Generation Partnership Project (3GPP) suggests that the probabilities of line-of-sight (LOS) and NLOS are related to the distance between the receiver and the transmitter. In this paper, we propose a Maximum Likelihood Estimator (MLE) for localization, which incorporates the distance dependent LOS/NLOS probabilities. Then, the position error bound is derived using Cramer-Rao Lower Bound (CRLB). Through numerical analysis, the impact of NLOS propagation on the position error bound is evaluated. The performance of our proposed algorithm is verified by real world experimental data.
在无线系统中广泛存在的非视距传播问题,如果在定位算法设计中不加以考虑,将会降低无线定位系统的性能。第三代合作伙伴计划(3GPP)表明,视距(LOS)和非视距(NLOS)的概率与接收机和发射机之间的距离有关。在本文中,我们提出了一种最大似然估计器(MLE)用于定位,它结合了距离依赖的LOS/NLOS概率。然后,利用Cramer-Rao下界法(CRLB)推导了定位误差界。通过数值分析,评估了NLOS传播对定位误差界的影响。通过实际实验数据验证了算法的有效性。
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引用次数: 14
Four-dimensional constellations for dual-polarized satellite communications 用于双极化卫星通信的四维星座
Pub Date : 2016-05-22 DOI: 10.1109/ICC.2016.7511493
Nicolò Mazzali, F. Kayhan, B. Shankar
In this paper, we investigate the performance of constellations optimized for transmissions in dual-polar mobile satellite applications. These four-dimensional constellations (inphase and quadrature per polarization) are designed for joint transmission over the two polarizations. Such constellations enhance the reliability of the system by providing certain redundancy into their design. Their performance is compared with transmission of independent 2D constellations over each polarization. As performance metrics, the pragmatic achievable mutual information and the bit error rate have been considered. The gains serve to indicate the need to further investigate 4D constellation design and its application in dual-polar MIMO systems.
在本文中,我们研究了在双极移动卫星应用中优化传输星座的性能。这些四维星座(相位和正交每偏振)被设计为联合传输在两个偏振。这种星座通过在其设计中提供一定的冗余来增强系统的可靠性。将它们的性能与独立二维星座在每个偏振上的传输进行了比较。作为性能指标,考虑了可实现的互信息和误码率。这些增益表明需要进一步研究四维星座设计及其在双极MIMO系统中的应用。
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引用次数: 4
Measurement-based massive MIMO channel modeling in 13–17 GHz for indoor hall scenarios 13-17 GHz室内大厅场景下基于测量的大规模MIMO信道建模
Pub Date : 2016-05-22 DOI: 10.1109/ICC.2016.7511276
Jiajing Chen, X. Yin, Stephen Wang
In this contribution, a recently conducted measurement campaign is introduced for investigating the characteristics of propagation channels for massive multiple-input multiple-output (MIMO) scenarios in a lecture hall environment. The channel responses for waves of higher frequency band ranging from 13 GHz to 17 GHz was measured with a vertically standing virtual two-dimensional (2-D) 20 × 20 = 400-element planar antenna array at the receiver (Rx) side, and an omni-directional antenna at the transmitter (Tx) side. Measurements were performed for four different locations of the Tx antenna in line-of-sight (LoS) scenarios. The variation of channel characteristics such as the narrowband channel gain, the K-factor and the composite delay spread, across the 2-D array aperture is investigated. The results are important for generating realistic channel realizations for the designing and performance evaluation of the algorithms for massive MIMO communication in the context of the fifth generation (5G) wireless networks.
在这篇文章中,介绍了最近进行的一项测量活动,用于研究演讲厅环境中大规模多输入多输出(MIMO)场景的传播通道特性。采用垂直站立的虚拟二维(2d) 20 × 20 = 400元平面天线阵列在接收端(Rx)和全向天线在发射端(Tx)分别测量了13 GHz ~ 17 GHz更高频段的信道响应。在视距(LoS)场景下,对Tx天线的四个不同位置进行了测量。研究了窄带信道增益、k因子和复合延迟扩展等信道特性在二维阵列孔径上的变化。研究结果对于第五代(5G)无线网络环境下大规模MIMO通信算法的设计和性能评估具有重要意义。
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引用次数: 24
Device-to-device communication in cellular networks under statistical queueing constraints 统计排队约束下蜂窝网络中的设备对设备通信
Pub Date : 2016-05-22 DOI: 10.1109/ICC.2016.7510856
Yi Li, M. C. Gursoy, Senem Velipasalar
Device-to-device (D2D) communication underlaid with cellular networks is a new paradigm, proposed to enhance the performance of cellular networks. By allowing a pair of D2D users to communicate directly and share the same spectral resources with the cellular users, D2D communication can achieve higher spectral efficiency, improve the energy efficiency, and lower the traffic delay. In this paper, transmission mode selection and resource allocation in a time-division multiplexed (TDM) cellular network with one cellular user, one base station, and a pair of D2D users is investigated under rate and queueing constraints. In particular, four possible modes are considered, namely the cellular mode, dedicated mode, uplink reuse mode, and downlink reuse mode. Using tools from stochastic network calculus, the system throughput under statistical queueing constraints is formulated, efficient resource allocation algorithms for all possible modes are proposed, and the influence of the positions of each node and the queueing constraints is analyzed via numerical results. Scenarios and conditions for different modes to be optimal in the sense of maximizing the sum-throughput are identified.
基于蜂窝网络的设备对设备通信(D2D)是一种新的通信模式,旨在提高蜂窝网络的性能。通过允许一对D2D用户直接通信,与蜂窝用户共享相同的频谱资源,D2D通信可以实现更高的频谱效率,提高能源效率,降低业务延迟。本文研究了一个蜂窝用户、一个基站和一对D2D用户的时分复用蜂窝网络在速率和排队约束下的传输模式选择和资源分配问题。特别地,考虑了四种可能的模式,即蜂窝模式、专用模式、上行复用模式和下行复用模式。利用随机网络微积分的工具,给出了统计排队约束下的系统吞吐量,提出了各种可能模式下的有效资源分配算法,并通过数值结果分析了各节点位置和排队约束对系统吞吐量的影响。在总吞吐量最大化的意义上,确定了不同模式的最优方案和条件。
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引用次数: 6
A transport layer approach to improve energy efficiency 采用传输层方法提高能源效率
Pub Date : 2016-05-22 DOI: 10.1109/ICC.2016.7510675
Muhammad Usman, D. Kliazovich, F. Granelli, P. Bouvry, P. Castoldi
Incorporating energy efficiency into the design of modern communication systems has become an important area of research. However, while most of the proposed solutions are devoted to making network hardware energy efficient, very few works focus on energy efficiency as a fundamental design parameter of network protocols. This paper proposes an analytical model for energy consumption of TCP which relates energy consumption to protocol operation cycles. Based on this model a number of optimization techniques are proposed to reduce energy consumption of TCP. The experiments, performed using NS2 simulations, demonstrate that energy savings can be as high as 93% for multiple TCP flows.
将能源效率纳入现代通信系统的设计已成为一个重要的研究领域。然而,虽然大多数提出的解决方案都致力于使网络硬件节能,但很少有工作将能效作为网络协议的基本设计参数。本文提出了一个TCP能耗分析模型,将能耗与协议运行周期联系起来。在此模型的基础上,提出了降低TCP能耗的优化技术。使用NS2模拟进行的实验表明,对于多个TCP流,节能可高达93%。
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引用次数: 4
Wideband THz communication channel measurements for 5G indoor wireless networks 5G室内无线网络的宽带太赫兹通信信道测量
Pub Date : 2016-05-22 DOI: 10.1109/ICC.2016.7511280
Nabil Khalid, Ö. Akan
The emerging technology Terahertz Band (0.3-10 THz) communication is envisioned to accommodate high speed wireless communication. Large bandwidth makes it a good candidate for 5G mobile networks. In this paper, fundamental experiments on channel modeling at THz Band are presented with detailed analysis of the setup. The measurement setup consisted of subharmonic mixer and vector network analyzer. Path loss and phase delay measurements from 260 GHz to 400 GHz for different distances, angles of arrival and objects acting as reflectors were examined along with their capacity limits. We have shown that LOS link can reach speeds of terabits per second. In addition, reflections from materials were also examined and results indicated that, in case of signal obstruction, a reflector can be used for establishing NLOS link.
新兴技术太赫兹波段(0.3-10太赫兹)通信被设想为适应高速无线通信。大带宽使其成为5G移动网络的良好候选者。本文介绍了太赫兹波段信道建模的基本实验,并对实验装置进行了详细的分析。测量装置由次谐波混频器和矢量网络分析仪组成。在260 GHz至400 GHz范围内,对不同距离、到达角度和作为反射器的物体进行了路径损耗和相位延迟测量,并对其容量限制进行了检查。我们已经证明,LOS链路可以达到每秒太比特的速度。此外,还检测了材料反射,结果表明,在信号受阻的情况下,可以使用反射器建立NLOS链路。
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引用次数: 51
Sentiment analysis: From binary to multi-class classification: A pattern-based approach for multi-class sentiment analysis in Twitter 情感分析:从二元到多类分类:一种基于模式的Twitter多类情感分析方法
Pub Date : 2016-05-22 DOI: 10.1109/ICC.2016.7511392
Mondher Bouazizi, T. Ohtsuki
Most of the state of the art works and researches on the automatic sentiment analysis and opinion mining of texts collected from social networks and microblogging websites are oriented towards the classification of texts into positive and negative. In this paper, we propose a pattern-based approach that goes deeper in the classification of texts collected from Twitter (i.e., tweets). We classify the tweets into 7 different classes; however the approach can be run to classify into more classes. Experiments show that our approach reaches an accuracy of classification equal to 56.9% and a precision level of sentimental tweets (other than neutral and sarcastic) equal to 72.58%. Nevertheless, the approach proves to be very accurate in binary classification (i.e., classification into “positive” and “negative”) and ternary classification (i.e., classification into “positive”, “negative” and “neutral”): in the former case, we reach an accuracy of 87.5% for the same dataset used after removing neutral tweets, and in the latter case, we reached an accuracy of classification of 83.0%.
在社交网络和微博网站文本的自动情感分析和观点挖掘方面,目前的研究大多是将文本分为积极和消极两类。在本文中,我们提出了一种基于模式的方法,该方法对从Twitter(即tweets)收集的文本进行更深入的分类。我们将推文分为7个不同的类别;但是,可以运行该方法将其分类为更多的类。实验表明,我们的方法达到了56.9%的分类准确率,情感推文(除了中性和讽刺)的准确率为72.58%。然而,该方法在二元分类(即分为“正面”和“负面”)和三元分类(即分为“正面”、“负面”和“中性”)中被证明是非常准确的:在前一种情况下,我们在删除中性推文后使用的相同数据集达到了87.5%的准确率,在后一种情况下,我们达到了83.0%的分类准确率。
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引用次数: 47
MIMO HetNets with wireless backhaul: An energy-efficient design 带无线回程的MIMO HetNets:一种节能设计
Pub Date : 2016-05-22 DOI: 10.1109/ICC.2016.7511180
H. Yang, Giovanni Geraci, Tony Q. S. Quek
Dense and heterogeneous networks (HetNets) are being deployed to provide better coverage and throughput, thus improving the quality of experience at mobile users. Besides the important implications for energy consumption, the trend towards densification calls for more and more wireless links to forward a massive backhaul traffic into the core network. It is critically important to take into account the presence of a wireless backhaul for the energy-efficient design of HetNets. In this paper, we provide a general framework to analyze the energy efficiency of a two-tier MIMO heterogeneous network with wireless backhaul under spatial multiplexing and dynamic time division duplex. We find that a two-tier HetNet with wireless backhaul can be significantly more energy efficient than a one-tier cellular network. However, this requires the backhaul bandwidth to be carefully allocated according to the network load conditions.
正在部署密集和异构网络(HetNets),以提供更好的覆盖和吞吐量,从而提高移动用户的体验质量。除了对能源消耗的重要影响外,致密化趋势要求越来越多的无线链路将大量回程流量转发到核心网。考虑到无线回程的存在对于HetNets的节能设计至关重要。在本文中,我们提供了一个总体框架来分析空间复用和动态时分双工下具有无线回程的两层MIMO异构网络的能量效率。我们发现,具有无线回程的两层HetNet比单层蜂窝网络节能得多。但是,这需要根据网络负载情况仔细分配回程带宽。
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引用次数: 7
A K-means-based network partition algorithm for controller placement in software defined network 一种基于k均值的软件定义网络控制器布局网络划分算法
Pub Date : 2016-05-22 DOI: 10.1109/ICC.2016.7511441
Guodong Wang, Yanxiao Zhao, Jun Huang, Q. Duan, Jun Yu Li
Software Defined Networking (SDN), the novel paradigm of decoupling the control logic from packet forwarding devices, has been drawing considerable attention from both academia and industry. As the latency between a controller and switches is a significant factor for SDN, selecting appropriate locations for controllers to shorten the latency becomes one grand challenge. In this paper, we investigate multi-controller placement problem from the perspective of latency minimization. Distinct from previous works, the network partition technique is introduced to simplify the problem. Specifically, the network partition problem and the controller placement problem are first formulated. An optimized K-means algorithm is then proposed to address the problem. Extensive simulations are conducted and results demonstrate that the proposed algorithm can remarkably reduce the maximum latency between centroid and their nodes compared with the standard K-means. Specifically, the maximum latency can reach 2.437 times shorter than the average latency achieved by the standard K-means.
软件定义网络(SDN)是一种将控制逻辑与包转发设备解耦的新范式,已经引起了学术界和工业界的广泛关注。由于控制器和交换机之间的延迟是SDN的一个重要因素,因此为控制器选择合适的位置以缩短延迟成为一项重大挑战。本文从时延最小化的角度研究了多控制器的布局问题。与以往的工作不同,本文引入了网络划分技术来简化问题。具体来说,首先阐述了网络划分问题和控制器放置问题。然后提出了一种优化的K-means算法来解决这个问题。大量的仿真结果表明,与标准K-means相比,该算法可以显著降低质心与其节点之间的最大延迟。具体来说,最大延迟可以比标准K-means实现的平均延迟短2.437倍。
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引用次数: 121
Network coding-aware IEEE 802.11 MAC protocol using batch transmissions and multiple reverse direction exchanges 网络编码感知IEEE 802.11 MAC协议使用批传输和多个反向交换
Pub Date : 2016-05-22 DOI: 10.1109/ICC.2016.7510781
Raúl Palacios, Biniam Hailu Dabi, J. Alonso-Zarate, F. Granelli, F. Fitzek, N. Fonseca
It has been shown in the literature that Network Coding (NC) can boost the performance of wireless networks. However, to really obtain the potential gain of NC, efficient Medium Access Control (MAC) protocols that operate with awareness of the NC functions are necessary. In this paper, we propose a novel NC-aware MAC protocol for IEEE 802.11 wireless networks that combines k-batch transmissions and multiple receiver-initiated reverse direction exchanges involving NC data to boost the overall network performance. The proposed protocol allows any node to transmit a burst of data packets in a single channel access invocation. Then, an intermediate node can transmit an NC data packet when receiving a valid data packet from a source node, without contending for channel access. Both analytical and simulation results presented in this paper show the high throughput and energy efficiency of the proposed protocol with gains ranging from 33% to 298% when compared to existing mechanisms based on the IEEE 802.11 Standard.
已有文献表明,网络编码(NC)可以提高无线网络的性能。然而,为了真正获得NC的潜在增益,有效的介质访问控制(MAC)协议是必要的,该协议可以感知NC功能。在本文中,我们为IEEE 802.11无线网络提出了一种新的NC感知MAC协议,该协议结合了k批传输和多个接收方发起的涉及NC数据的反向交换,以提高整体网络性能。提出的协议允许任何节点在单个通道访问调用中传输数据包的突发。然后,当从源节点接收到有效数据包时,中间节点可以传输NC数据包,而无需争夺通道访问。本文的分析和仿真结果表明,与基于IEEE 802.11标准的现有机制相比,所提出的协议具有高吞吐量和高能效,增益范围为33%至298%。
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引用次数: 2
期刊
2016 IEEE International Conference on Communications (ICC)
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