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2019 28th Wireless and Optical Communications Conference (WOCC)最新文献

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Research on Modeling of Radio Propagation in Vacuum Pipeline Scene 真空管道场景中无线电传播建模研究
Pub Date : 2019-05-01 DOI: 10.1109/WOCC.2019.8770638
Yan Wang, Y. Wen, Jinbao Zhang, Dan Zhang, Yue Xu
The low air resistance and low friction characteristics of vacuum piping make it a new type of transportation system. Due to the influence of the train body, the radio propagation in the vacuum pipe needs to consider the multipath loss of the train body reflection and the diffraction loss of the obstacle. According to the Huygens-Fresnel principle, this paper studies the application criteria of basic models such as vehicle reflection multipath interference and obstacle diffraction by using standard interference and diffraction algorithms for the propagation mechanism of radio waves in a limited space. A radio propagation model along the surface of the vehicle body based on the above algorithm is established, which can provide design references for engineering applications.
真空管道的低空气阻力和低摩擦特性使其成为一种新型的输送系统。由于列车本体的影响,无线电在真空管中的传播需要考虑列车本体反射的多径损耗和障碍物的衍射损耗。根据惠更斯-菲涅耳原理,利用无线电波在有限空间内传播机理的标准干涉和衍射算法,研究了车辆反射多径干扰和障碍物衍射等基本模型的应用准则。基于上述算法建立了车辆车身表面的无线电传播模型,可为工程应用提供设计参考。
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引用次数: 3
Joint Iteration Belief Propagation Decoding for Generalized Polar Coded BICM System 广义极坐标编码BICM系统的联合迭代信念传播译码
Pub Date : 2019-05-01 DOI: 10.1109/WOCC.2019.8770658
Fengyi Cheng, A. Liu, Jing Ren, Xiaohu Liang, Yurong Wang, Cai Biao, Hao Liang
Bit-interleaved coded modulation with soft iterative decoding (BICM-ID) system has desirable performance with many channel codes. But for polar code, there are at least two problems to overcome: the high decoding complexity and the undesirable correlation among the decoded bits. The former prohibits its application in practical engineering, while the latter engenders performance degradation for no iterative gains. To solve these problems, a joint iteration BP decoding algorithm based on generalized BICM-ID scheme is presented. In this algorithm, we combine the demodulation and decoding into one factor graph so that the noise corrupted symbols can be simply seen as the extended information nodes of BP decoder. Further, asymptotic performance bound of the proposed system is calculated to analyze its advantages and drawbacks. Simulation results show that the proposed scheme can significantly improve the performance of the unmodified BIPCM-ID scheme with lower complexity.
比特交织编码调制软迭代译码(BICM-ID)系统具有较好的多信道编码性能。但对于极性码,至少有两个问题需要克服:解码的高复杂性和译码位之间的不良相关性。前者阻碍了其在实际工程中的应用,而后者在没有迭代增益的情况下导致性能下降。为了解决这些问题,提出了一种基于广义BICM-ID方案的联合迭代BP解码算法。在该算法中,我们将解调和解码合并成一个因子图,使得噪声损坏符号可以简单地看作是BP解码器的扩展信息节点。进一步计算了系统的渐近性能界,分析了系统的优缺点。仿真结果表明,该方案能显著提高未修改BIPCM-ID方案的性能,且复杂度较低。
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引用次数: 0
Target Localization in Industrial Environment based on TOA Ranging 基于TOA测距的工业环境下目标定位
Pub Date : 2019-05-01 DOI: 10.1109/WOCC.2019.8770570
Vue Qi, Pan Luo, Cheng Xu, Jiawang Wan, Jie He
In recent years, wireless positioning technology has penetrated into various fields of society. The GPS and Beidou Navigation Satellite System has done an excellent job in outdoor positioning, and the indoor positioning based on positioning technologies such as RFID, Wi-Fi and Bluetooth has been rapidly developed. In the industrial environment, the positioning of specific targets is faced with many problems such as occlusion and multipath effect. This paper introduces a positioning system based on TOA ranging in industrial environment. The system can solve the problem of inaccurate or abnormal positioning data in industrial environment.
近年来,无线定位技术已经渗透到社会的各个领域。GPS和北斗卫星导航系统在室外定位方面做得非常出色,基于RFID、Wi-Fi、蓝牙等定位技术的室内定位也得到了快速发展。在工业环境下,特定目标的定位面临着遮挡、多径效应等诸多问题。介绍了一种工业环境下基于TOA测距的定位系统。该系统可以解决工业环境中定位数据不准确或异常的问题。
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引用次数: 1
A Multi-Controller Placement Strategy Based on Delay and Reliability Optimization in SDN 基于SDN时延和可靠性优化的多控制器配置策略
Pub Date : 2019-05-01 DOI: 10.1109/WOCC.2019.8770551
Zi-fu Fan, Jie Yao, Xianhui Yang, Zheng-qiang Wang, Xiaoyu Wan
Software Defined Network (SDN) as a novel network architecture is a subversive revolution of traditional network. It realizes the centralized control of the network by decoupling the forwarding and controlling functions, which greatly improves the flexibility and controllability of the network. Obviously, the layout of controllers affects the networks ability to respond to network events. Therefore, the controller placement is an important problem in SDN community. In this paper, we take the link failure factors into consideration, and make a comprehensive consideration of the number of control path rerouting and the worst-case delay between the controller and the switch in each link failure state, and formulate the problem as a multi-objective optimization problem. To solve the problem, we propose a heuristic method based on particle swarm optimization. Numerical results demonstrate the effectiveness of the proposed algorithm. It also shows that the proposed strategy can guarantee the delay and reliability of the control layer in most link failure states.
软件定义网络(SDN)作为一种新型的网络架构,是对传统网络的颠覆性变革。通过对转发和控制功能的解耦,实现了对网络的集中控制,大大提高了网络的灵活性和可控性。显然,控制器的布局会影响网络对网络事件的响应能力。因此,控制器的放置是SDN社区的一个重要问题。本文考虑了链路失效因素,综合考虑了各链路失效状态下控制路径重路由的次数和控制器与交换机之间的最坏延时,将问题表述为多目标优化问题。为了解决这一问题,我们提出了一种基于粒子群优化的启发式方法。数值结果表明了该算法的有效性。结果表明,该策略在大多数链路故障状态下都能保证控制层的时延和可靠性。
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引用次数: 21
Low Supply Voltage Control Oscillator with Transformer Feedback for Photoplethysmography 具有变压器反馈的光电脉搏波低电压控制振荡器
Pub Date : 2019-05-01 DOI: 10.1109/WOCC.2019.8770574
W. Lai, S. Jang, Yan-Cu Lin
An ultra-low supply voltage differential voltage controlled oscillator (VCO) is designed and implemented using TSMC SiGe 0.18µm CMOS 3P6M process for biomedical application and photoplethysmography. The designed circuit topology is an native nMOS-core cross-coupled LC-tank VCO and extremely-low-voltage and low power operation is achieved using on-chip transformers in positive feedback loops to swing the output signals above the supply and below the ground potential. At the supply voltage of 0.2 V, the output phase noise of the VCO is −117.63 dBc/Hz at 1MHz offset frequency from the carrier frequency of 991MHz, and the figure of merit is − 180.2 dBc/Hz. Total power consumption is 0.536mW. Tuning range is about 111MHz, from 991 to 1102MHz, while the control voltage was tuned from 0 V to 2 V. The die area is 0.472 × 0.722 mm2.
采用台积电SiGe 0.18µm CMOS 3P6M工艺设计并实现了一种超低电源电压差分压控振荡器(VCO),用于生物医学应用和光电体积脉搏测量。所设计的电路拓扑是一个原生的nmos核心交叉耦合LC-tank VCO,并且使用片上变压器在正反馈回路中摆动输出信号,使其高于电源,低于地电位,从而实现极低电压和低功耗的工作。在电源电压为0.2 V时,在与991MHz载波频率偏移1MHz时,VCO输出相位噪声为- 117.63 dBc/Hz,优值为- 180.2 dBc/Hz。总功耗为0.536mW。调谐范围约为111MHz,从991到1102MHz,而控制电压从0 V调谐到2 V。模具面积为0.472 × 0.722 mm2。
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引用次数: 1
A User Mobility Prediction Method to Reduce Unnecessary Handover for Ultra Dense Network 一种减少超密集网络不必要切换的用户移动性预测方法
Pub Date : 2019-05-01 DOI: 10.1109/WOCC.2019.8770632
Rao Shi, Yunfeng Peng, Liang Zhang
Next generation wireless cellular networks will be ultra dense network(UDN) to increase system capacity through spatial reuse in a hot spot, but with the cost of increasing handover and delay for mobile users. In this paper, we try to find a solution to reduce unnecessary handover(UHO). The main contribution of this paper is that a user mobility prediction method based on Lagrange Interpolation is proposed and the transition probability of user equipment to its neighboring femtocells can be evaluated according to the slope of the trajectory polynomial and velocity. Then power offset of base station is achieved through prediction to avoid UHO. Simulations show that the proposed method can get 75%~90% prediction accuracy and decrease 17%~30% handover compared with traditional LTE handover method.
下一代无线蜂窝网络将是超密集网络(UDN),通过热点的空间复用来增加系统容量,但代价是移动用户的切换和延迟增加。在本文中,我们试图找到一个解决方案,以减少不必要的切换(UHO)。本文的主要贡献是提出了一种基于拉格朗日插值的用户迁移预测方法,该方法可以根据轨迹多项式的斜率和速度来评估用户设备向邻近飞基站的转移概率。然后通过预测得到基站的功率偏移,以避免UHO。仿真结果表明,与传统的LTE切换方法相比,该方法的预测准确率达到75%~90%,切换率降低17%~30%。
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引用次数: 10
Understanding and Partitioning Mobile Traffic using Internet Activity Records Data - A Spatiotemporal Approach 利用互联网活动记录数据理解和划分移动流量——一种时空方法
Pub Date : 2019-05-01 DOI: 10.1109/WOCC.2019.8770653
Kashif Sultan, Hazrat Ali, Haris Anwaar, K. Nkabiti, Adeel Ahmad, Zhongshan Zhang
The internet activity records (IARs) of a mobile cellular network posses significant information which can be exploited to identify the network's efficacy and the mobile users' behavior. In this work, we extract useful information from the IAR data and identify a healthy predictability of spatio-temporal pattern within the network traffic. The information extracted is helpful for network operators to plan effective network configuration and perform management and optimization of network's resources. We report experimentation on spatiotemporal analysis of IAR data of the Telecom Italia. Based on this, we present mobile traffic partitioning scheme. Experimental results of the proposed model is helpful in modelling and partitioning of network traffic patterns.
移动蜂窝网络的互联网活动记录(IARs)具有可用于识别网络有效性和移动用户行为的重要信息。在这项工作中,我们从IAR数据中提取有用的信息,并确定网络流量中时空模式的健康可预测性。提取的信息有助于网络运营商规划有效的网络配置,对网络资源进行管理和优化。我们报告了意大利电信IAR数据的时空分析实验。在此基础上,提出了移动流量分区方案。该模型的实验结果有助于网络流量模式的建模和划分。
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引用次数: 2
Dynamic Multicast Traffic Grooming Using Light Trails in Elastic Optical Networks 弹性光网络中基于光尾的动态组播流量疏导
Pub Date : 2019-05-01 DOI: 10.1109/WOCC.2019.8770675
Hwa-Chun Lin, Yuan-Xi Zhuang
Traffic grooming is a technique that integrates multiple low-rate traffic into a single communication channel to improve bandwidth usage efficiency. Light trail is a technology that allows traffic to be optically groomed into an optical channel at source and intermediate nodes. Traffic on a light trail can be dropped at multiple nodes along the light trail such that multicast connections can be efficiently provisioned. This paper considers using light trail technology in elastic optical networks and studies dynamic multicast grooming problem in such networks. An auxiliary graph is devised to study the dynamic traffic grooming problem. Based on the auxiliary graph, a dynamic multicast traffic grooming algorithm that employs both light trail and light path grooming is proposed. The proposed dynamic multicast traffic grooming algorithm is shown via simulations to yield better performance than an algorithm that uses only light path grooming.
流量疏导是一种将多个低速率流量集成到单个通信通道中以提高带宽使用效率的技术。光迹是一种技术,它允许通信在源节点和中间节点上以光学方式进入光通道。轻轨上的流量可以在轻轨沿线的多个节点上丢弃,这样可以有效地提供多播连接。考虑在弹性光网络中应用光迹技术,研究弹性光网络中的动态组播疏导问题。设计了一个辅助图来研究动态流量疏导问题。在辅助图的基础上,提出了一种同时采用光迹和光路滤波的动态组播流量滤波算法。仿真结果表明,所提出的动态组播流量疏导算法比仅使用光路疏导的算法具有更好的性能。
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引用次数: 2
Blocking-triggered Defragmentation Mechanism based on the Selected Path for Elastic Optical Network 基于选择路径的弹性光网络阻塞触发碎片整理机制
Pub Date : 2019-05-01 DOI: 10.1109/WOCC.2019.8770540
Lingqi Luo, Xiaoling Liu, Jingwen Zhang, Cong Yu, J. Shen
A blocking-triggered defragmentation mechanism based on the selected path (SP-D) is proposed to solve spectrum fragments in elastic optical networks (EONs). The proposed mechanism analyzes the arriving traffic requirement as well as the current spectrum condition, and then takes the effectiveness and the complexity of spectrum defragmentation into consideration simultaneously. When service blocking is detected, a path from source node to destination node is selected according to the proposed policy and then the spectrum reallocation is performed sequentially based on the selected path to ease the blocking situation. Theoretical analysis and numerical simulation results show that compared with the previous mechanisms, the proposed SP-D mechanism can reduce the network latency as 7.67% and decrease the bandwidth blocking probability (BBP) as 5.3%, respectively.
针对弹性光网络中的频谱碎片问题,提出了一种基于选择路径(SP-D)的阻塞触发碎片整理机制。该机制分析了到达的业务需求和当前频谱状况,同时考虑了频谱碎片整理的有效性和复杂性。当检测到业务阻塞时,根据策略选择从源节点到目的节点的路径,然后根据选择的路径顺序重新分配频谱,缓解阻塞情况。理论分析和数值模拟结果表明,与之前的机制相比,所提出的SP-D机制可将网络延迟降低7.67%,将带宽阻塞概率(BBP)降低5.3%。
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引用次数: 1
A Resource Allocation Algorithm Based on Overall User Satisfaction of Internet of Things 基于用户整体满意度的物联网资源分配算法
Pub Date : 2019-05-01 DOI: 10.1109/WOCC.2019.8770646
Anqi Zhu, Songtao Guo, Mingfang Ma, Hao Feng, Bei Liu, Xin Su, Qiucen Jiang
With the continuous innovation of Internet of Things (IoT) technology, multi-network convergence has become the mainstream of the IoT. In order to ensure that the IoT users can normally perform information exchange in different services, how to optimize network resource allocation in multiple networks is a key issue. In this paper, we propose a resource allocation algorithm for heterogeneous IoT based on overall user satisfaction. On the basis of considering user satisfaction based on energy efficiency and transmission rate, an efficient online algorithm is obtained through calculating the optimal bandwidth of users in different access networks. The simulation results show that comparing to transmission rate based algorithm and load-balancing algorithm, the network resource allocation algorithm proposed can significantly improve the overall user satisfaction.
随着物联网技术的不断创新,多网融合已成为物联网的主流。为了保证物联网用户在不同业务中能够正常进行信息交换,如何在多网络中优化网络资源分配是一个关键问题。本文提出了一种基于整体用户满意度的异构物联网资源分配算法。在考虑基于能源效率和传输速率的用户满意度的基础上,通过计算不同接入网中用户的最优带宽,得到一种高效的在线算法。仿真结果表明,与基于传输速率的算法和负载均衡算法相比,所提出的网络资源分配算法能显著提高用户的整体满意度。
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引用次数: 3
期刊
2019 28th Wireless and Optical Communications Conference (WOCC)
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