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Final program 最后的程序
Pub Date : 2022-01-16 DOI: 10.4269/ajtmh.2008.79.1a
J. Rosenthal, D. Gilliam, M. Alber, J. Ball, V. Blondel, K. Gałkowski, T. Georgiou, Koichi Hashimoto, B. Hanzon, M. E. Valcher, V. Vinnikov, Xiaochang A. Wang, S. Zampieri, B. Datta, J. Helton
s of Presented Talks Monday August 12, 2002 8:30-9:30 Room : 101 Plenary Talk Bruce Hajek (University of Illinois) A Basket of System Theoretic Problems in Communications Researchers are currently faced with a rich set of problems in the design and analysis of wireless communication systems and high-speed communication networks. The purpose of this talk is to survey several significant open problems which system theory could play a role in solving. The problems include: (a) Providing delay constraints in a large communication network in a distributed way, using delay calculus based on the max-plus algebra, (b) Finding the capacity of cellular networks (will survey the recent use of the theory of large random matrices and related free probability theory), (c) Predicting efficiency and fairness, and designing allocation mechanisms, for the Internet, as thousands of autonomous systems interact through self-interested pricing and congestion, and (d) Distributing limited routing information in a large amorphous network, such as a peer-to-peer network or ad hoc sensor array, to facilitate position location. 9:30-10:30 Room : 101 Invited Talk Roger Brockett (Harvard University) Optimal System Identification for NMR Applications In a wide variety of settings, the measurement of nuclear magnetic resonance (NMR) effects has proven to be a remarkably effective for investigating unknown structures on both large and small scales. Over the years a large body of technique has been developed for improving the sensitivity and resolution of NMR measurements and many recent advances in biochemistry and medicine are dependent on the sophisticated signal processing techniques now used routinely. From a system theoretic perspective, problems in this area can be thought of as identification problems involving bilinear systems. They are distinguished from linear system identification problems by the fact that the quality of the identification is strongly dependent upon the form of the excitatory input applied to the system. Many ingenious techniques, such as the “two dimensional” Fourier transform procedure have been developed based on particular types of input patterns. Because of the low signal to noise ratios inherent in NMR, the optimization of such methods requires the use of stochastic models for the dynamics and measurement processes. In this talk we take a fresh look at problems in this area with a view toward finding computational procedures that will determine the inputs which will optimize specific performance measures. In particular, we explore performance measures related to conditional entropy, and in this way develop a formalism for establishing the mathematical limits on what can be accomplished with better input design. 9:30-10:30 Room : 102 Invited Talk Hans-Andrea Loeliger (ETH) Factor Graphs, Least Squares and Kalman Filtering Factor graphs are graphical models with origins in coding theory and with close relations to Willems-type behavioral system t
讲座时间2002年8月12日星期一8:30-9:30教室:101全体会议布鲁斯·哈杰克(伊利诺伊大学)通信中的一篮子系统理论问题研究人员目前在无线通信系统和高速通信网络的设计和分析方面面临着一系列丰富的问题。这次演讲的目的是调查几个重要的开放性问题,系统理论可以在解决这些问题中发挥作用。这些问题包括:(a)使用基于max-plus代数的延迟演算,以分布式方式在大型通信网络中提供延迟约束;(b)寻找蜂窝网络的容量(将调查大型随机矩阵理论和相关自由概率论的最新使用);(c)预测互联网的效率和公平性,并设计分配机制,因为成千上万的自治系统通过自利定价和拥塞进行交互;(d)在大型无定形网络(如点对点网络或自组织传感器阵列)中分布有限的路由信息,以方便位置定位。罗杰·布罗克特(哈佛大学)核磁共振应用的最佳系统识别在各种各样的环境中,核磁共振(NMR)效应的测量已被证明是在大尺度和小尺度上研究未知结构的非常有效的方法。多年来,为了提高核磁共振测量的灵敏度和分辨率,已经开发了大量的技术,生物化学和医学的许多最新进展都依赖于现在常规使用的复杂信号处理技术。从系统理论的角度来看,这一领域的问题可以被认为是涉及双线性系统的识别问题。它们与线性系统识别问题的区别在于,识别的质量强烈依赖于应用于系统的兴奋性输入的形式。许多巧妙的技术,如“二维”傅立叶变换程序已经基于特定类型的输入模式开发出来。由于核磁共振固有的低信噪比,这种方法的优化需要使用动态和测量过程的随机模型。在这次演讲中,我们将以一种全新的视角来看待这一领域的问题,以期找到能够确定将优化特定性能度量的输入的计算程序。特别是,我们探索了与条件熵相关的性能度量,并以这种方式开发了一种形式化的方法,用于建立更好的输入设计可以完成的数学限制。Hans-Andrea Loeliger (ETH)因子图、最小二乘法和卡尔曼滤波因子图是起源于编码理论的图形模型,与williams型行为系统理论有着密切的关系。和(多)积算法是通过因子图中的信息传递来操作的,它包含了编码、信号处理和人工智能中的各种算法。在这次演讲中,我们将把福尼式因子图应用于具有二次成本函数的线性模型,并展示卡尔曼滤波和递归最小二乘算法的一般版本如何作为和积算法的实例出现。(这种因子图与电网络的“同构”将在单独的演讲中提出)9:30-10:30房间:136特邀演讲Sjoerd Verduyn Lunel(莱顿大学)时滞系统的控制与稳定对于受反馈律支配的动态系统,反馈回路中自然产生的时滞表示由于通信、传输、运输或术语效应而产生的影响。在微分方程系统中引入时滞会导致无限维的状态空间。本文概述了时滞系统控制与镇定的基本理论,并讨论了时滞系统控制与镇定的最新进展。
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引用次数: 0
An intelligent image-based customer analysis service 基于智能图像的客户分析服务
Pub Date : 2014-12-29 DOI: 10.1109/APNOMS.2014.6996534
Ting-Wei Lee, Yen-Lin Chiu, Yu-Shan Wu, Heng-Sung Liu
The customer analysis can be applied widely in many situations, such as surveillance system, digital signage, store entrance, etc. In digital signage application, when customers are viewing ads, the system can automatically analyze multiple attributes of customers, including customer's gender, age, height, viewing distance, the degree of interest and total number of visitors. The advertising companies or store owners can judge potential customers who might interest in some particular products and increase the probability of the products being purchased through those customer analysis data. Another application in the store entrance is to calculate the total number of customers, gender and age statistical results in each time interval. That significant information can be used not only to integrate with point of sale (POS) system for letting the customers has a relationship with their purchased products but also to make the staff arrangement more adequate. The important equipment used in this system is the RGB-D sensor (Xtion Pro Live) which can capture the 3D depth information and 2D color image simultaneously. According to the 3D depth information, the system can detect and track the human to get the viewing distance, height and total number of visitors. Then the 2D image recognition technology is adopted to detect the face from human contour region and to recognize their gender, age and attention time for degree of interest. Finally, the system returns the analysis results and statistical information to the advertising companies or store owners for providing a reference in their business strategy.
客户分析可以广泛应用于监控系统、数字标牌、店铺入口等场合。在数字标牌应用中,当客户在观看广告时,系统可以自动分析客户的多个属性,包括客户的性别、年龄、身高、观看距离、兴趣程度、访客总数等。广告公司或店主可以通过这些客户分析数据来判断可能对某些特定产品感兴趣的潜在客户,并增加购买该产品的概率。在商店入口的另一个应用是计算每个时间间隔内的顾客总数,性别和年龄统计结果。这些重要的信息不仅可以用于与销售点(POS)系统的集成,让客户与他们购买的产品建立关系,而且可以使人员安排更加充分。该系统使用的重要设备是RGB-D传感器(Xtion Pro Live),它可以同时捕获三维深度信息和二维彩色图像。系统根据三维深度信息,对人进行检测和跟踪,得到观看距离、高度和总人数。然后采用二维图像识别技术从人体轮廓区域检测人脸,识别其性别、年龄和关注时间的兴趣度。最后,系统将分析结果和统计信息返回给广告公司或店主,为他们的经营策略提供参考。
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引用次数: 10
Path capacity estimation by passive measurement for the constant monitoring of every network path 基于无源测量的路径容量估计,实现对每条网络路径的持续监控
Pub Date : 2014-12-29 DOI: 10.1109/APNOMS.2014.6996516
N. Ohkawa, Y. Nomura
Degradation of networking quality is a serious problem for service providers (e.g., on-demand video subscription service) since it causes customer defection in their services and results in a decline of their sales. Insufficient path capacity is one of the typical causes which degrade networking quality. Especially, the recent technical trend to shift virtualized network, in which the network is dynamically and autonomically reconfigured, increases the risk of unexpected insufficiency of the path capacity in the network. To detect such an unexpected insufficiency of path capacity, a constant monitoring of the whole network is highly expected. Path capacity estimation with passive measurement method is an approach which suits to such a purpose since it adds no additional load to the target network. However, existing passive measurement methods tend to either 1) have insufficient accuracy on their estimation or 2) require heavy computational cost for their histogram analyses. In this paper, we introduce a novel path capacity estimation method by passive measurement for a constant monitoring of a network 24hour, 365-day. Our method can estimate the capacity of each path with sufficient accuracy by eliminating the two factors of degrading the estimation accuracy, which are the influence of TCP window flow control and the influence of cross traffic on the path. We evaluated our method using packets captured from our in-company backbone network. Our method accurately estimated the capacity of the narrowest link in every 1524 connections, in which 80% of the connections were within approximately 15% of their actual values (in over 1MB traffic case), as shown in Fig. 8.
网络质量的下降对于服务提供商(例如,点播视频订阅服务)来说是一个严重的问题,因为它会导致客户对其服务的背叛,并导致其销售额的下降。路径容量不足是导致网络质量下降的典型原因之一。特别是最近的技术趋势转向虚拟化网络,网络是动态和自主的重新配置,增加了网络中路径容量意外不足的风险。为了检测这种意想不到的路径容量不足,需要对整个网络进行持续监控。基于被动测量的路径容量估计方法不给目标网络增加额外的负荷,是一种适合于此目的的方法。然而,现有的被动测量方法往往要么1)估计精度不足,要么2)直方图分析需要大量的计算成本。在本文中,我们提出了一种新的路径容量估计方法,通过被动测量来持续监测网络24小时,365天。该方法消除了影响估计精度的两个因素,即TCP窗口流量控制的影响和交叉流量对路径的影响,能够以足够的精度估计出每条路径的容量。我们使用从公司内部骨干网捕获的数据包来评估我们的方法。我们的方法准确地估计了每1524个连接中最窄链路的容量,其中80%的连接在其实际值的大约15%以内(在超过1MB的流量情况下),如图8所示。
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引用次数: 2
Dynamic internet pricing and bandwidth guarantees with nash equilibrium 基于纳什均衡的动态互联网定价与带宽保证
Pub Date : 2014-12-29 DOI: 10.1109/APNOMS.2014.6996519
Rohit Tripathi, G. Barua
The decrease in price of internet access has brought clients' focus on a good internet service. Clients now demand guarantees for the bandwidth promised. We present a scheme in which clients are assured connection and bandwidth and if assured service is not provided, service providers pay penalty to them. The use of multi-SIM handheld devices such as mobiles and tablets have enabled clients to make a “choice” between multiple service providers for communication services. With competition, a client will prefer to connect to that provider who is providing the lowest price with guarantees. In this paper, we present a scenario of dynamic pricing and guarantees with penalties and providers have to decide on pricing strategies which will maximize their income. We present a solution among two service providers which achieves a Nash equilibrium with the maximizing of the expected income being the decision criterion.
互联网接入价格的下降使客户把注意力集中在优质的互联网服务上。客户端现在要求保证所承诺的带宽。我们提出了一种方案,在该方案中,客户可以获得保证的连接和带宽,如果没有提供保证的服务,服务提供商将向客户支付罚款。多sim卡手持设备(如手机和平板电脑)的使用使客户能够在多个通信服务提供商之间做出“选择”。在竞争中,客户将更愿意与提供最低价格和保证的供应商联系。在本文中,我们提出了一个动态定价和带有惩罚的担保场景,供应商必须决定使其收益最大化的定价策略。本文提出了以期望收入最大化为决策准则的两个服务提供者之间的纳什均衡解决方案。
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引用次数: 6
Location-aware services based on Wi-Fi network 基于Wi-Fi网络的位置感知服务
Pub Date : 2014-12-29 DOI: 10.1109/APNOMS.2014.6996533
Yun-Hui Wen, H. Chang, Hsiao-Wen Kao, Gwo-hwa Ju
Modern Wi-Fi network has been a convinced way to connect to internet and widely accepted by people. Base on the Wi-Fi infra-structure, we can provide location-based services which could help to increase customers' experience and engagement in the services or activities provided by area owners. In this paper, we present a Wi-Fi hot zone based Location-Aware services which can dynamically cognize user's current location and automatically offer related contents, such as activities information and indoor map services. We also address the access control and verification method to restrict users from accessing the LBS content from outside the Wi-Fi hot zone venue. Through field trial provisioning a number of Wi-Fi APs, as well as system of network-side development and deployment, we execute an experiment to verify the viability of our location-aware service and analyze the performance. The results show that our system can correctly indicate user's current location within a period of reasonable reaction time.
现代Wi-Fi网络已经成为一种可靠的连接互联网的方式,并被人们广泛接受。基于Wi-Fi基础设施,我们可以提供基于位置的服务,这可以帮助增加客户体验和参与区域所有者提供的服务或活动。本文提出了一种基于Wi-Fi热区的位置感知服务,该服务可以动态识别用户的当前位置,并自动提供相关内容,如活动信息和室内地图服务。我们还解决了访问控制和验证方法,以限制用户从Wi-Fi热区以外的地点访问LBS内容。通过现场试验配置多个Wi-Fi ap,以及系统的网络端开发和部署,我们进行了一个实验来验证我们的位置感知服务的可行性,并分析了性能。结果表明,该系统能够在合理的反应时间内准确地显示用户当前的位置。
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引用次数: 5
Multi-layer fault diagnosis method in the Network Virtualization Environment 网络虚拟化环境下的多层故障诊断方法
Pub Date : 2014-12-29 DOI: 10.1109/APNOMS.2014.6996580
Congxian Yan, Ying Wang, Xue-song Qiu, Wenjing Li, Lu Guan
The performance and reliability of services relies on the network virtualization environment's capabilities to effectively detect and diagnose faults in both substrate and virtual network. However, Network Virtualization Environment (NVE) brings to fault diagnosis new challenges such as inaccessible substrate network information and multi-layer faults. To solve the above issues, a Multi-layer Fault Diagnosis Method (MFDM) is proposed. A layer-by-layer strategy is used to resolve the problem of inaccessible substrate network information. And a filtering algorithm is proposed to distinguish the multi-layer faults in the network virtualization environment. At last, a contribution-based hypothesis selection algorithm is proposed to infer the most possible faults. Simulations and experimental results show that MFDM has a higher performance in the accuracy ratio, false-positive ratio.
业务的性能和可靠性依赖于网络虚拟化环境有效检测和诊断底层网络和虚拟网络故障的能力。然而,网络虚拟化环境(Network Virtualization Environment, NVE)给故障诊断带来了难以获取底层网络信息和多层故障等新挑战。针对上述问题,提出了一种多层故障诊断方法。采用一层一层的策略来解决基板网络信息不可访问的问题。并提出了一种过滤算法来区分网络虚拟化环境中的多层故障。最后,提出了一种基于贡献的假设选择算法来推断最可能出现的故障。仿真和实验结果表明,MFDM在准确率、误报率等方面具有较高的性能。
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引用次数: 6
Implementation of a distributed web community crawler 一个分布式网络社区爬虫的实现
Pub Date : 2014-12-29 DOI: 10.1109/APNOMS.2014.6996586
Seonyoung Park, Youngseok Lee
A web community is an important space for online users to exchange information, ideas and thoughts. Due to collective intelligence of the web communities, marketing and advertisement activities have been highly focused on these sites. While articles in the web communities are open to the public, they cannot be easily collected and analyzed, because they are written in natural languages and their formats are diverse. Though many web crawlers are avaialble, they are not good at gathering web documents. First, the URLs of web articles are frequently changed and redundant, which will make the crawling job difficult. Second, the amount of articles is significantly large that the crawler should be designed in a scalable manner. Therefore, we propose a distributed web crawler optimized for collecting articles from popular communities. From the experiemnts we showed that our implementation achieves high throughput compared with the open-source crawler, Nutch.
网络社区是在线用户交流信息、观点和思想的重要空间。由于网络社区的集体智慧,营销和广告活动高度集中在这些网站上。虽然网络社区中的文章是向公众开放的,但它们不容易被收集和分析,因为它们是用自然语言编写的,格式也多种多样。虽然有许多网络爬虫可用,但它们都不擅长收集网络文档。首先,网络文章的url经常发生变化并且是冗余的,这将使爬行工作变得困难。其次,文章的数量非常大,因此应该以可伸缩的方式设计爬虫。因此,我们提出了一个分布式网络爬虫优化从热门社区收集文章。实验表明,与开源爬虫Nutch相比,我们的实现实现了更高的吞吐量。
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引用次数: 1
Quality of service test mechanism and management of broadband access network 宽带接入网业务质量测试机制与管理
Pub Date : 2014-12-29 DOI: 10.1109/APNOMS.2014.6996513
Wen-Che Yang, Jhih-Dao Jhan, Dong-Yie Chen, Kuo-Hsiang Lai, Rong-Ruey Lee
As the growth of digital home application, the quality of service (QoS) of network is a very critical issue and influences the satisfaction of end users to enjoy the desired service, especially for real-time sensitive service. It is important for service provider to verify the actual QoS parameters, such as delay, jitter and packet loss are satisfying the service requirement of their customers. The popular method to check the QoS is using ICMP ping function to gather the QoS parameters, but results in the precision argument and lacks of one-way information for IPTV downstream flow. The other issue is how to activate the QoS test function for the large scale CPEs (Customer Promise Equipment). In this research, we propose a QoS test mechanism at home gateway to exclude all factors of home networking. The proposed approach integrates the TR-069 remote management methodology to increase the scalability to activate the proposed QoS test action for a large number of home gateways. We illustrate the implementation and integration procedure of the proposed test approach and TR-069 mechanism of the managed home gateway. We also execute the proposed test by TR-069 management server, and comfirm its accuracy. The proposed mechanism provides a convenient way for the service providers to clarify the service quality of subscribed lines of broadband access network, and decreases the complaint and increases the satisfaction of their customers.
随着数字家庭应用的发展,网络的服务质量(QoS)是一个非常关键的问题,它直接影响到终端用户对服务的满意度,特别是对实时敏感的服务。对于服务提供商来说,验证实际的QoS参数,如延迟、抖动和丢包等是否满足客户的业务需求是很重要的。目前常用的QoS检测方法是利用ICMP ping功能采集QoS参数,但这种方法存在精度问题,且缺乏IPTV下行流的单向信息。另一个问题是如何激活大规模cpe(客户承诺设备)的QoS测试功能。在本研究中,我们提出了一种家庭网关的QoS测试机制,以排除家庭网络的所有因素。所提出的方法集成了TR-069远程管理方法,以增加可伸缩性,以便为大量家庭网关激活所提议的QoS测试动作。本文给出了所提出的测试方法与管理家庭网关的TR-069机制的实现和集成过程。并在TR-069管理服务器上进行了测试,验证了测试结果的准确性。该机制为运营商提供了一种方便的方式来明确其宽带接入网订阅线路的服务质量,减少了客户的投诉,提高了客户的满意度。
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引用次数: 7
A reliable multi-hop safety message broadcast in Vehicular Ad hoc Networks 车载自组织网络中可靠的多跳安全消息广播
Pub Date : 2014-12-29 DOI: 10.1109/APNOMS.2014.6996563
Duc Ngoc Minh Dang, Vandung Nguyen, Chuan Pham, Thant Zin Oo, C. Hong
Vehicular Ad hoc NETworks (VANETs) should provide the reliable safety message broadcasts and the efficient non-safety message transmissions to vehicles. The IEEE 1609.4 MAC, which supports multi-channel operations in VANETs, is not reliable enough for the safety message broadcast and not efficient in the Service CHannel (SCH) resources utilization. In this paper, we propose a MAC protocol which supports a Reliable Multi-hop Safety message Broadcast (RMSB-MAC) in VANETs. Each Multi-hop Forwarder (MF) collects the safety messages from the neighbor vehicle nodes, and then the MF uses its reserved time slot to broadcast them to all vehicle nodes in its transmission range as well as to forward them to the next MF. Moreover, by allowing vehicle nodes to exchange non-safety messages during the Control CHannel Interval (CCHI), the RMSB-MAC utilizes the SCH resources more efficiently.
车载自组织网络(vanet)应该向车辆提供可靠的安全信息广播和有效的非安全信息传输。IEEE 1609.4 MAC在vanet中支持多通道操作,但在安全消息广播方面不够可靠,在服务通道(SCH)资源利用方面效率不高。本文提出了一种支持可靠多跳安全消息广播(RMSB-MAC)的MAC协议。每个多跳转发器(Multi-hop Forwarder, MF)收集来自相邻车辆节点的安全消息,然后利用其预留的时隙将这些消息广播到其传输范围内的所有车辆节点,并转发给下一个MF。此外,通过允许车辆节点在控制通道间隔(CCHI)期间交换非安全消息,RMSB-MAC可以更有效地利用SCH资源。
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引用次数: 8
Evolution of network configurations: High-level analysis of an operational IP backbone network 网络配置的演进:一个可操作的IP骨干网的高级分析
Pub Date : 2014-12-29 DOI: 10.1109/APNOMS.2014.6996105
Fuliang Li, Jiahai Yang, Huijing Zhang, Suogang Li, Xingwei Wang, Jianping Wu
In this paper, we gather the weekly reports of an operational IP backbone network from January 2006 to January 2013, according to which, we can restore the truth and uncover the evolution of network configurations of the studied network. Our high-level analyses illustrate that rate limiting and launching routes for new customers are most frequently configured. We can identify and construct configuration templates by correlating each task to a certain set of commands in configuration files, based on which, automated configuration provisioning for an operational backbone network is feasible. In addition, we can configure redundant links for those with higher rate of failures according to our detailed analyses of link failures, which will enhance the stability and reliability of data transmission.
本文收集了某运营IP骨干网2006年1月至2013年1月的周报,根据周报可以还原真相,揭示所研究网络的网络配置演变。我们的高级分析表明,为新客户配置速率限制和启动路由是最常见的。我们可以通过将每个任务与配置文件中的特定命令集相关联来识别和构建配置模板,在此基础上,为可操作的骨干网自动提供配置是可行的。此外,我们可以根据对链路故障的详细分析,为故障率较高的链路配置冗余链路,增强数据传输的稳定性和可靠性。
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引用次数: 0
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The 16th Asia-Pacific Network Operations and Management Symposium
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