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2013 IEEE International Conference on Communications Workshops (ICC)最新文献

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A modified joint uplink-downlink opportunistic scheduling for Quality of Service guarantees 一种改进的服务质量保证联合上行下行机会调度
Pub Date : 2013-06-09 DOI: 10.1109/ICCW.2013.6649382
N. Zorba, E. Yaacoub, Ahmad M. El-Hajj, Z. Dawy
Quality of Service (QoS) is a very important metric in wireless communication systems, where both Uplink (UL) and Downlink (DL) connections request strict QoS demands in terms of rate, delay, etc. for their proper operation. The development of wireless communications standards and the emergence of new interactive and conversational services with bi-directional QoS requirements changes the scheduling context from a link-level to a system level. To this end, this paper presents a joint UL-DL bandwidth allocation approach that considers outage as the main QoS parameter to be minimized. The well-known opportunistic scheduling algorithm is first modified to account for the UL-DL coupling and a mathematical expression of the outage probability is derived. Then the expression is employed in the joint UL-DL bandwidth allocation problem. The formulated problem is shown to be a convex optimization problem. Simulation results demonstrate the merits of the proposed approach compared to traditional techniques.
在无线通信系统中,服务质量(QoS)是一个非常重要的度量,上行链路(UL)和下行链路(DL)连接都要求在速率、延迟等方面有严格的QoS要求才能正常运行。无线通信标准的发展以及具有双向QoS需求的新型交互和会话服务的出现,将调度上下文从链路级更改为系统级。为此,本文提出了一种以最小化中断为主要QoS参数的联合UL-DL带宽分配方法。首先对著名的机会调度算法进行了改进,以考虑UL-DL耦合,并推导出停机概率的数学表达式。然后将该表达式应用于联合UL-DL带宽分配问题。结果表明,该问题是一个凸优化问题。仿真结果表明了该方法与传统方法相比的优越性。
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引用次数: 6
Converged fiber-wireless access networks for next generation mobile backhaul enabling CoMP 融合光纤无线接入网络的下一代移动回程支持CoMP
Pub Date : 2013-06-09 DOI: 10.1109/ICCW.2013.6649360
Yizhuo Yang, Feng Li, C. Lim, A. Nirmalathas
We propose a converged fiber-wireless access network based on radio-over-fiber technologies as future mobile backhaul incorporating base station cooperation schemes (CoMP). Both analog and digitized RoF technologies are discussed as possible solutions, in terms of base station configuration, system performance and energy efficiency. The implementation approach and the capacity gain of CoMP are analyzed. To reduce the processing overhead, CoMP should only be enabled with a significant CoMP gain. Experimental demonstration of the proposed scheme is presented with more than 2-dB SNR improvement.
我们提出了一种基于光纤上无线电技术的融合光纤-无线接入网,作为结合基站合作方案(CoMP)的未来移动回程。从基站配置、系统性能和能源效率方面讨论了模拟和数字化RoF技术作为可能的解决方案。分析了CoMP的实现方法和容量增益。为了减少处理开销,应该只启用具有显著CoMP增益的CoMP。实验证明,该方案的信噪比提高了2 db以上。
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引用次数: 7
Low complexity disparity estimation for immersive 3D video transmission 沉浸式3D视频传输的低复杂度视差估计
Pub Date : 2013-06-09 DOI: 10.1109/ICCW.2013.6649306
B. Micallef, C. J. Debono, R. Farrugia
Bandwidth-limited channels demand the transmission of the per-pixel depth maps with the texture data to provide immersive 3D video services that allow arbitrary 3D viewpoint reconstruction. This auxiliary depth data offers geometric information, which together with the multi-view and epipolar geometries, can be exploited during 3D video coding to calculate geometric positions for the search areas of disparity estimation. These positions represent a more accurate estimate match to compensate the current macro-block from than those provided by the median adopted by the H.264/MVC standard. The result is smaller search areas that reduce the encoder's computational requirement. In this work, we exploit this fact together with the largest depth variation within the macro-block to encode, to calculate and adaptively adjust these areas along the epipolar lines. The proposed solution achieves a speedup gain of up-to 32 times over the original disparity estimation, with negligible influence on the rate-distortion performance of 3D video coding. This highly reduces the computational cost of the H.264/MVC encoder and eases its need to be implemented on highly expensive systems that are otherwise necessary to meets the stringent latency requirement of broadcast transmissions. Moreover, it provides similar coding efficiencies required for such scenarios.
带宽有限的通道要求传输带有纹理数据的逐像素深度图,以提供允许任意3D视点重建的沉浸式3D视频服务。这些辅助深度数据提供了几何信息,可以在3D视频编码过程中利用这些几何信息与多视图和极面几何信息计算视差估计搜索区域的几何位置。这些位置代表了比H.264/MVC标准采用的中位数提供的位置更准确的估计匹配来补偿当前宏块。结果是更小的搜索区域,减少了编码器的计算需求。在这项工作中,我们利用这一事实以及宏块内最大的深度变化来编码、计算和自适应地调整这些区域沿极线。该方案在原有视差估计的基础上实现了高达32倍的加速增益,对3D视频编码的率失真性能影响可以忽略不计。这大大降低了H.264/MVC编码器的计算成本,并减轻了在昂贵的系统上实现它的需要,否则必须满足广播传输的严格延迟要求。此外,它还提供了此类场景所需的类似编码效率。
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引用次数: 7
SAR image superpixels by minimizing a statistical model and ratio of mean intensity based energy SAR图像的超像素是通过最小化统计模型和基于平均强度的能量比
Pub Date : 2013-06-09 DOI: 10.1109/ICCW.2013.6649365
Jilan Feng, Y. Pi, Jianyu Yang
Superpixel based SAR image classification methods can take advantage of the contextual information in SAR images effectively, leading to robust classification results. The accuracy of superpixel generation has great impact on the performance of the following classification stage. In this paper, based on the property of SAR images, an energy minimizing based superpixel generation approach is proposed for SAR images. The energy function is composed of two parts. The data term is defined according to the statistical characteristic of SAR images, and the regularization term is defined by using the ratio of mean intensity. Then the superpixel generation is performed by energy minimizing with graph cut based energy minimization method. Experimental results on both synthetic and real SAR image data verify the good performance of the proposed approach. Compared with several superpixel approaches, the proposed approach can deal with speckle noise more effectively, resulting in better applicability for SAR images.
基于超像素的SAR图像分类方法可以有效地利用SAR图像中的上下文信息,从而获得鲁棒性强的分类结果。超像素生成的准确性对后续分类阶段的性能影响很大。本文根据SAR图像的特点,提出了一种基于能量最小化的SAR图像超像元生成方法。能量函数由两部分组成。根据SAR图像的统计特性定义数据项,利用平均强度比定义正则化项。然后利用基于图割的能量最小化方法进行能量最小化,实现超像素生成。在合成和真实SAR图像数据上的实验结果验证了该方法的良好性能。与几种超像素方法相比,该方法能更有效地处理散斑噪声,对SAR图像具有更好的适用性。
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引用次数: 2
Spectrum breathing and cell load balancing for self organizing wireless networks 自组织无线网络的频谱呼吸和小区负载平衡
Pub Date : 2013-06-09 DOI: 10.1109/ICCW.2013.6649408
Hongseok Kim, Hyea Youn Kim, Y. Cho, Seung-Hwan Lee
In this paper, we develop a self organizing mechanism for spectrum breathing and user association in cellular networks employing fractional frequency reuse. In doing this we specifically focus on flow-level cell load balancing under spatially inhomogeneous traffic distributions. Our work adaptively changes the spectrum bandwidth of each base station (BS) so that spectrums of the BSs breathe in and out to balance the loads of the BSs. Spectrum breathing is further combined with α-optimal user association for better load balancing. Our problem is challenging in the sense that the problem is not necessarily a convex optimization. To tackle the difficulty we decouple spectrum breathing and user association by introducing the concept of reference load, which is independent of the spectrum bandwidth. We propose an iterative algorithm that always converges to a fixed point, which is possibly an optimal solution. We verify that the proposed algorithm achieves the optimality by performing exhaustive search. Our extensive simulations demonstrate that the proposed algorithm significantly improves the system performs: decreasing the delay more than 10 times or increasing the admittable traffic load by more than 125%.
在本文中,我们开发了一种自组织机制,用于蜂窝网络中使用分数频率复用的频谱呼吸和用户关联。在此过程中,我们特别关注空间非均匀流量分布下的流级单元负载平衡。我们的工作自适应地改变每个基站的频谱带宽,使基站的频谱吸入和排出,以平衡基站的负载。频谱呼吸进一步与α-最优用户关联相结合,以实现更好的负载平衡。我们的问题很有挑战性,因为这个问题不一定是凸优化。为了解决这一难题,我们引入了独立于频谱带宽的参考负载概念,将频谱呼吸和用户关联解耦。我们提出了一个迭代算法,它总是收敛到一个不动点,这可能是一个最优解。通过穷举搜索验证了算法的最优性。我们的大量仿真表明,所提出的算法显着改善了系统性能:将延迟降低10倍以上或将可接受的流量负载增加125%以上。
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引用次数: 8
Transmission strategies for joint wireless information and energy transfer in a two-user MIMO interference channel 双用户MIMO干扰信道中联合无线信息和能量传输策略
Pub Date : 2013-06-09 DOI: 10.1109/ICCW.2013.6649302
Jaehyun Park, B. Clerckx
This paper investigates transmission strategies for joint wireless information and energy transfer in a two-user MIMO interference channel, in which each receiver either decodes the incoming information data (information decoding, ID) or harvests the RF energy (energy harvesting, EH) to operate with a potentially perpetual energy supply. In the two-user interference channel, we have four different scenarios according to the receiver mode - (ID1, ID2), (EH1, EH2), (EH1, ID2), and (ID1, EH2). For single-operation modes such as (ID1, ID2) and (EH1, EH2), the optimal transmission strategies achieving either maximum information bit rate or maximum harvested energy are derived - iterative water filling and rank-one energy beamforming. For (EH1, ID2), and (ID1, EH2), the achievable rate-energy (R-E) tradeoff region is investigated when one of the transmitters takes a rank-one energy beamforming and the other transmitter takes “water-filling-like” approach. Here, for the rank-one energy beamforming, the transmitter can take two different strategies - maximum energy beamforming (MEB) and minimum leakage beamforming (MLB). Finally, a new rank-one energy beamforming strategy - signal-to-leakage-and-energy ratio (SLER) maximization beamforming - is proposed.
本文研究了双用户MIMO干扰信道中联合无线信息和能量传输的传输策略,其中每个接收器要么解码传入的信息数据(信息解码,ID),要么收集射频能量(能量收集,EH),以便在潜在的永久能量供应下运行。在双用户干扰信道中,根据接收机模式,我们有四种不同的场景- (ID1, ID2), (EH1, EH2), (EH1, ID2)和(ID1, EH2)。对于(ID1, ID2)和(EH1, EH2)等单操作模式,导出了实现最大信息比特率或最大能量收集的最佳传输策略-迭代注水和一级能量波束形成。对于(EH1, ID2)和(ID1, EH2),研究了当一个发射机采用一级能量波束形成而另一个发射机采用“类注水”方式时,可实现的速率-能量(R-E)权衡区域。其中,对于一级能量波束形成,发射机可以采用最大能量波束形成(MEB)和最小泄漏波束形成(MLB)两种不同的策略。最后,提出了一种新的一级能量波束形成策略——信漏能比最大化波束形成策略。
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引用次数: 17
Power charging and discharging scheduling for V2G networks in the smart grid 智能电网中V2G网络的充放电调度
Pub Date : 2013-06-09 DOI: 10.1109/ICCW.2013.6649392
M. Zeng, S. Leng, Yan Zhang
In the last few decades, environmental impact of the petroleum-based transportation system, along with the lack of oil, has led to renewed interest in Electric Vehicles (EVs). The electric power grid has to supply sufficient electric power as the energy source of EV. In order to satisfy the huge demand of electric power by the continuously growing EVs, the grid should be innovated towards smart grid with scattered structure, intermittent renewable energy, efficient scheduling policies as well as the advanced Information and Communication Technologies (ICT). With the aid of the Vehicle-to-Grid (V2G) system, EVs are able to be charged or discharge according to the varying electric load and price of electricity. In this paper, we propose adaptable scheduling schemes for the electric charging/feedback of EVs in either a mobile mode or a parking mode. The charging scheduling scheme in the mobile mode focuses on minimizing the delay of charge, whereas the scheme of parking mode dedicates to minimizing the peak-to-average ratio of power grid load and the charging cost. Moreover, electricity feedback is integrated into the parking mode for the decrease of the load offered by grid. Based on the actual daily load of electric power in a city of China, simulation experiments have been conducted to validate the efficiency of the proposed schemes.
在过去的几十年里,以石油为基础的交通系统对环境的影响,以及石油的缺乏,重新引起了人们对电动汽车(ev)的兴趣。电网必须提供足够的电能作为电动汽车的能量来源。为了满足不断增长的电动汽车对电力的巨大需求,电网应向结构分散、可间歇性再生、高效调度政策和先进信息通信技术的智能电网创新。在V2G系统的帮助下,电动汽车可以根据不同的电力负荷和电价进行充电或放电。本文针对移动模式和停车模式下的电动汽车充电/反馈问题,提出了适应性强的调度方案。移动模式下的充电调度方案以最小化充电延迟为重点,而停车模式下的充电调度方案以最小化电网负荷峰均比和充电成本为重点。此外,停车模式中还集成了电力反馈,以减少电网提供的负荷。以中国某城市的实际日用电负荷为例,进行了仿真实验,验证了所提方案的有效性。
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引用次数: 18
Detection and protection of the attacks to the sheep and goats using an intelligent wireless sensor network 利用智能无线传感器网络检测和保护对绵羊和山羊的攻击
Pub Date : 2013-06-09 DOI: 10.1109/ICCW.2013.6649385
F. Llario, S. Sendra, L. Parra, J. Mauri
Wolves attacks to sheep and goats are very frequent at night. It has caused great economic losses in some countries. When an animal feels the presence of people or different animals, it experiences an increase of its cardiac frequency and corporal temperature. In this paper, we present a network of wireless nodes using IEEE 802.15.4 technology, which are capable of monitoring the vital signs of the sheep and goats. This smart system allows us to detect the collective stress caused by the attack of any predator during the night. It uses a learning system which decision is taken after having received 5 messages. When the system detects these anomalies in the animal's behavior, it sends an alarm signal to alert the person in charge of the livestock facility and activates visual and acoustic alarms capable of frighten the predators and prowlers.
狼在夜间袭击绵羊和山羊是非常频繁的。它给一些国家造成了巨大的经济损失。当动物感受到人或其他动物的存在时,它的心跳频率和体温都会增加。本文提出了一种采用IEEE 802.15.4技术的无线节点网络,该网络能够监测绵羊和山羊的生命体征。这个智能系统可以让我们在夜间探测到任何掠食者攻击所造成的集体压力。它使用一个学习系统,在收到5条信息后做出决定。当系统检测到动物行为中的这些异常时,它会发出警报信号,提醒牲畜设施的负责人,并激活视觉和声音警报,从而吓唬捕食者和潜行者。
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引用次数: 16
Online IRC botnet detection using a SOINN classifier 在线IRC僵尸网络检测使用SOINN分类器
Pub Date : 2013-06-09 DOI: 10.1109/ICCW.2013.6649447
Francesco Carpine, Claudio Mazzariello, Carlo Sansone
IRC botnets have been rapidly growing in number, in infected network hosts, and, most of all, in size of caused damages. Hence, there is the need of a real-time detection solution, as accurate as possible; the earlier a botnet is discovered, the smaller will be its potential impact. In order to tackle these issues, our approach to IRC Botnet detection considers both the online context and the time consumption problem. In particular, we use both statistical and digrams-based features to build a two-class behavioral model. Then, we setup a fast detection engine based on an unsupervised incremental learning method. Several tests performed on real data (botnet and non-botnet IRC channels) revealed the effectiveness of the entire proposed solution.
IRC僵尸网络在数量上迅速增长,在受感染的网络主机中,最重要的是,在造成损害的规模上。因此,需要一种尽可能准确的实时检测解决方案;僵尸网络越早被发现,其潜在影响就越小。为了解决这些问题,我们的IRC僵尸网络检测方法同时考虑了在线环境和时间消耗问题。特别是,我们同时使用统计和基于图的特征来构建两类行为模型。然后,我们建立了一个基于无监督增量学习方法的快速检测引擎。在真实数据(僵尸网络和非僵尸网络IRC通道)上进行的几次测试显示了所提出的整个解决方案的有效性。
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引用次数: 8
A secure WLAN access sharing system using SNS 基于SNS的安全无线局域网接入共享系统
Pub Date : 2013-06-09 DOI: 10.1109/ICCW.2013.6649335
Jun-Hyuk Choi, Y. Woo, Seung-Man Chun, Jongtae Park
In order to provide the mobile multimedia service cost-effectively, the smartphone user's demand on free access to widely deployed Wireless LAN (WLAN) systems has been greatly increasing. This is because 3G or 4G mobile networks are usually expensive, and slower than WLAN. Unfortunately, although secure WLANs are installed widely, they are usually not shared. In this article, we have designed and implemented secure WLAN access sharing system using Social Network Service (SNS). A new secure WLAN access sharing model has been designed and implemented, in which the social trust strength between people is employed for secure WLAN access control.
为了经济有效地提供移动多媒体服务,智能手机用户对免费接入广泛部署的无线局域网(WLAN)系统的需求大大增加。这是因为3G或4G移动网络通常价格昂贵,而且速度比WLAN慢。不幸的是,尽管安全的无线局域网被广泛安装,但它们通常不被共享。本文设计并实现了基于社交网络服务(SNS)的安全无线局域网接入共享系统。设计并实现了一种新的无线局域网安全访问共享模型,该模型利用人与人之间的社会信任强度对无线局域网进行安全访问控制。
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引用次数: 0
期刊
2013 IEEE International Conference on Communications Workshops (ICC)
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