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2016 International Computer Symposium (ICS)最新文献

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Joint Beamforming and Power Allocation Design in Non-Orthogonal Multiple Access Systems 非正交多址系统的联合波束形成与功率分配设计
Pub Date : 2016-12-01 DOI: 10.1109/ICS.2016.0145
Jia-Yu Yang, Wan-Jen Huang
Nonorthogonal multiple access (NOMA) transmission is a popular candidate technology for the next generation broadband mobile communication systems because of high spectrum efficiency. In this paper, we proposed two beamforming scheme, namely, matched-to-the-stronger-channel (MSC) beamforming and optimal beamforming schemes for a two-user downlink NOMA system. Moreover, we also develop optimal power allocation for both schemes. It shows through simulation results that the optimal scheme is capable to combat the near-far effect and provides high achievable sum rate especially when the geographical angle between two users is small.
非正交多址(NOMA)传输因其频谱效率高而成为下一代宽带移动通信系统的热门候选技术。本文针对双用户下行NOMA系统,提出了两种波束形成方案,即匹配-强信道(MSC)波束形成方案和最优波束形成方案。此外,我们还开发了两种方案的最优功率分配。仿真结果表明,该方案具有较强的抗远近效应能力,在用户地理夹角较小的情况下具有较高的可达和率。
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引用次数: 4
Efficient Emergency Forwarding to Prevent Message Broadcasting Storm in Mobile Society via Vehicle-to-X Communications for 5G LTE-V 利用5G LTE-V的车对x通信实现高效应急转发,防止移动社会中的消息广播风暴
Pub Date : 2016-12-01 DOI: 10.1109/ICS.2016.0102
Ben-Jye Chang, Ying-Hsin Liang, Yao-De Huang
The self-driving car become a completely novel application to fulfill highly safe driving era, in which the Vehicle-to-X (V2X) communications and cloud computing act as the key technologies. In such new-trend applications, for shortening the emergency messages transmitting or sharing among the self-driving cars and human-driving cars, the message broadcasting is adopted, but suffers from the broadcasting storm and message flooding. Clearly, for the mobile society via V2X, the message broadcasting protocol leads to an unpredictable long forwarding delay and degrades the QoS of real-time transmission and the synchronization interval of the adaptive cruise control (ACC). This paper thus proposes an efficient emergency message forwarding approach to guarantee the broadcasting delay and to prevent the broadcasting storm for V2X communications in 5G mobile society. Numerical results demonstrate that the proposed approach outperforms the compared approaches in transmission range, connectivity probability, total number of forwarding messages, number of hop-counts, and end-to-end delay.
自动驾驶汽车是实现高度安全驾驶时代的全新应用,其中V2X通信和云计算是关键技术。在这种新趋势的应用中,为了缩短自动驾驶汽车和人类驾驶汽车之间的紧急信息传输或共享,采用了消息广播,但遭受了广播风暴和消息洪水的困扰。显然,对于通过V2X的移动社会,消息广播协议导致不可预测的长转发延迟,降低了实时传输的QoS和自适应巡航控制(ACC)的同步间隔。为此,本文提出了一种高效的应急报文转发方法,以保证5G移动社会中V2X通信的广播延迟,防止广播风暴的发生。数值结果表明,该方法在传输距离、连通性概率、转发消息总数、跳数和端到端延迟等方面都优于其他方法。
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引用次数: 16
Comprehensive DDF Link Protection with a Bus-Connected SIEPON Architecture 采用总线连接SIEPON架构的综合DDF链路保护
Pub Date : 2016-12-01 DOI: 10.1109/ICS.2016.0043
I. Hwang, Andrew Fernando Pakpahan
Currently a massive amount of traffic per second is delivered through EPON systems, one of the prominent access network technologies for delivering the next generation network. Therefore, it is vital to keep the EPON optical distribution network (ODN) working by providing the necessity protection mechanism in the deployed devices, otherwise, when failures occur it will cause a great loss for both network operators and business customers. In this paper, we propose a bus-connected architecture to protect and recover distribution drop fiber (DDF) link faults or transceiver failures at ONU(s) in SIEPON system. The proposed architecture provides a cost-effective architecture, which delivers the high fault-tolerance in handling multiple DDF faults, while also providing flexibility in choosing the backup ONU assignments. Simulation results show that the proposed architecture provides the reliability and maintains quality of service (QoS) performance in terms of mean packet delay, system throughput, packet loss and EF jitter when DDF link failures occur.
EPON系统是下一代网络的重要接入网技术之一,目前每秒都有大量的流量通过EPON系统传输。因此,通过在部署的设备中提供必要的保护机制来保证EPON optical distribution network (ODN)的正常运行至关重要,否则一旦发生故障,将给网络运营商和企业客户造成巨大的损失。在本文中,我们提出了一种总线连接架构来保护和恢复SIEPON系统中ONU(s)的DDF链路故障或收发器故障。所提出的体系结构提供了一种经济高效的体系结构,在处理多个DDF故障时提供了高容错性,同时还提供了选择备份ONU分配的灵活性。仿真结果表明,当DDF链路发生故障时,所提出的体系结构在平均数据包延迟、系统吞吐量、丢包和EF抖动方面提供了可靠性并保持了服务质量(QoS)性能。
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引用次数: 1
A Software Maintenance Project Size Estimation Tool Based On Cosmic Full Function Point 基于Cosmic全功能点的软件维护项目规模估算工具
Pub Date : 2016-12-01 DOI: 10.1109/ICS.2016.0115
Chi-Jui Lin, Dowming Yeh
Software size estimation is a good reference to assess the project's manpower, schedule and budget in the initial project planning. Nowadays, many organizations are concerned about the cost of software maintenance, because the cost of software maintenance is constantly growing. It takes almost eighty-percent budget of software companies on maintenance, which means that the costs of software development are out-weighted by maintenance costs. Function point methods are widely adopted in estimating the size of a software under development. However, the function point calculation of a maintenance project is different from a development project. In COSMIC-FFP, when analyzing a system developed from scratch, all messages in a sequence diagram will be accumulated as function points. However, when analyzing maintenance project, if the messages passed to objects which are the same as the previous version rather than the newly added or changed, such messages will not be counted as function points. It is necessary to distinguish between the unchanged and new or enhanced functions in order to distinguish between the maintenance costs in the future and the development costs in the past. This study proposes a method to distinguish between existing and new or changed function points for maintenance projects and develops a supporting tool for COSMIC-FFP. By comparing the differences between two versions of a system, we obtained the number of lines of code per Cfsu from a regression analysis, so that we can assess more accurately the size involved in a maintenance project.
软件规模估算是在项目初始规划中评估项目人力、进度和预算的一个很好的参考。如今,很多组织都很关心软件维护的成本,因为软件维护的成本在不断增长。软件公司在维护上花费了几乎80%的预算,这意味着软件开发的成本被维护成本所压倒。功能点方法被广泛应用于软件开发规模的估算。但是,维护项目的功能点计算与开发项目不同。在COSMIC-FFP中,当分析从零开始开发的系统时,序列图中的所有消息将作为功能点累积。但是,在分析维护项目时,如果传递给对象的消息与以前的版本相同,而不是新添加或更改的,则这些消息将不被计算为功能点。为了区分未来的维护成本和过去的开发成本,有必要区分不变的和新的或增强的功能。本研究提出了一种方法来区分维护项目的现有和新的或改变的功能点,并开发了COSMIC-FFP的支持工具。通过比较系统的两个版本之间的差异,我们从回归分析中获得了每个Cfsu的代码行数,这样我们就可以更准确地评估维护项目中涉及的规模。
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引用次数: 8
An Adaptive Buffer Cache Management Scheme 一种自适应缓存管理方案
Pub Date : 2016-12-01 DOI: 10.1109/ICS.2016.0033
Hsung-Pin Chang, Cheng-Pang Chiang, Yu-Cheng Yu
Previous cache replacement algorithms utilize the access history information to make replacement decisions. However, they fail to deliver utmost performance since the history information exploited is incomplete. Motivated by the limitations of existing algorithms, this paper proposes a novel replacement scheme, called the Pattern-assisted Adaptive Recency Caching (PARC). PARC simultaneously utilizes the history information of recency, frequency, and access patterns to estimate the locality strength and to select the victim block. Specifically, PARC exploits the reference regularities exhibited in past behaviors, including looping or sequential references, to actively and rapidly adapt the recency and frequency information of blocks so as to exactly distill blocks with long-term utility from those with only short-term utility. Through comprehensive simulations on a variety of traces of different access patterns, we show that PARC is robust since, except for random workloads where the performance of each cache replacement algorithm is similar, PARC always outperforms the least recently used (LRU) scheme and other existing cache replacement algorithms.
以前的缓存替换算法利用访问历史信息来进行替换决策。然而,由于利用的历史信息不完整,它们无法提供最佳性能。鉴于现有算法的局限性,本文提出了一种新的替代方案,称为模式辅助自适应近因缓存(PARC)。PARC同时利用频度、频率和访问模式的历史信息来估计局部性强度并选择受害块。具体来说,PARC利用了在过去的行为中所表现出的参考规律,包括循环或顺序引用,主动快速地适应区块的近距和频率信息,从而精确地从只有短期效用的区块中提取出具有长期效用的区块。通过对不同访问模式的各种轨迹的综合模拟,我们表明PARC是鲁棒的,因为除了每种缓存替换算法的性能相似的随机工作负载外,PARC总是优于最近最少使用(LRU)方案和其他现有的缓存替换算法。
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引用次数: 4
On the Design of Multi-User Streaming Feedback System for Application of Cooperative Learning 面向合作学习应用的多用户流反馈系统设计
Pub Date : 2016-12-01 DOI: 10.1109/ICS.2016.0134
Chih-Tsan Chang, Cheng-Yu Tsai, Song Peng, Hung-Hsu Tsai, Pao-Ta Yu
This paper develops a multi-user streaming feedback system for cooperative learning in classroom learning. The system offers Android Apps to perform mobile interactive learning. Therefore, the system can be applied for interactive teaching. It also provides a game-based approach to improve students' cooperative learning. On the cognitive development of the game-based learning, the students use mobile devices camera and record their screen activity to play from streaming server and broadcast the contest on the streaming video wall such that the whole class can be able to see the contest. Moreover, the teacher can observe students' learning status and problems in real-time. That students have more willing to concentrate on their learning in the lecture. In other words, the streaming feedback system for cooperative learning in game-based theory classroom learning increases interactive between the teacher and students. Therefore, it improves learners' interest and efficiency in learning.
本文开发了一种用于课堂合作学习的多用户流反馈系统。该系统提供Android应用程序,实现移动交互学习。因此,该系统可以应用于互动式教学。它还提供了一种基于游戏的方法来提高学生的合作学习。在游戏化学习的认知发展上,学生使用移动设备摄像头,记录自己的屏幕活动,从流媒体服务器播放比赛,并在流媒体视频墙上播放比赛,让全班同学都能看到比赛。此外,教师可以实时观察学生的学习状况和问题。学生在课堂上更愿意集中精力学习。也就是说,游戏理论课堂学习中合作学习的流反馈系统增加了师生之间的互动性。因此,它提高了学习者的学习兴趣和效率。
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引用次数: 3
Total k-Domatic Partition on Some Classes of Graphs 若干图类上的全k-域划分
Pub Date : 2016-12-01 DOI: 10.1109/ICS.2016.0023
Chuan-Min Lee
For any positive integer k, the total k-domatic partition problem is to partition the vertices of a graph G into k pairwise disjoint total dominating sets. In this paper, we study the problem for planar graphs, chordal bipartite graphs, convex bipartite graphs, and bipartite permutation graphs. We show that the total 3-domatic partition problem on planar graphs is NP-complete. Moreover, we give an alternative algorithm to solve the total k-domatic partition problem for chordal bipartite graphs with weak elimination orderings, and adapt it to solve the problem in linear time for bipartite permutation graphs and convex bipartite graphs even if Gamma-free forms of the adjacency matrices of the considered graphs are not given.
对于任意正整数k,总k域划分问题是将图G的顶点划分为k对不相交的总控制集。本文研究了平面图、弦二部图、凸二部图和二部置换图的问题。我们证明了平面图上的全3域划分问题是np完全的。此外,我们给出了求解弱消序弦二部图的全k域划分问题的一种替代算法,并将其应用于求解二部置换图和凸二部图的线性时间问题,即使所考虑的图的邻接矩阵的Gamma-free形式没有给出。
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引用次数: 2
Research on Q-Learning Based Channel Access Control Algorithm for Internet of Vehicles 基于q学习的车联网通道访问控制算法研究
Pub Date : 2016-12-01 DOI: 10.1109/ICS.2016.0104
Zhao Hai-tao, Du Ai-Qian, Zhu Hong-bo, Li Dapeng, LI Nan-jie
A Q-Learning based back-off algorithm was proposed in this paper because the traditional DCF approach used for IEEE 802.11p MAC protocol to access the channel has some problems of the low packet delivery rate, high delay and the poor scalability in VANETs. The proposed algorithm which is quite different from the traditional BEB algorithm was adopted by the nodes(agents) to interact with surroundings continuously and learn from each other. The vehicle nodes adjust the size of CW(Contention Window) dynamically according to the results learned from the surroundings so that the nodes can access the channel with the optimal CW eventually minimizing the packet collisions and end-to-end delay. The simulation results show that the communication nodes using the proposed algorithm can adapt to the unknown vehicular environment rapidly, and simultaneously the high packet delivery ratio, low end-to-end delay and high fairness can be achieved for vehicular network with various load.
针对传统的IEEE 802.11p MAC协议接入信道的DCF方法在VANETs中存在数据包传输速率低、时延高和可扩展性差的问题,提出了一种基于Q-Learning的back-off算法。该算法与传统的BEB算法有很大不同,节点(agent)与周围环境不断交互,相互学习。车辆节点根据从周围环境学习到的结果动态调整竞争窗口(CW)的大小,从而使节点能够以最优的CW访问信道,最终最大限度地减少数据包冲突和端到端延迟。仿真结果表明,采用该算法的通信节点能够快速适应未知的车载环境,并能在不同负载的车载网络中实现高数据包传输率、低端到端时延和高公平性。
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引用次数: 6
Parallel Design of Background Subtraction and Template Matching Modules for Image Objects Tracking System 图像目标跟踪系统中背景减法与模板匹配模块的并行设计
Pub Date : 2016-12-01 DOI: 10.1109/ICS.2016.0013
Kuei-Chung Chang, P. Liu, Yu-Shun Wang
In recent years, many researchers have proposed intelligent systems based on the IoT (Internet of Things). Among these smart systems, one of the most common applications is intelligent surveillance system. Due to the development of the camera, some applications adopt higher resolution of images to get more accurate results. Therefore, how to process these high-resolution images in real time has become more and more important. In this paper, we design two efficient libraries to detect and track objects. Background subtraction and template matching techniques are our basic approaches which are usually applied to object detection and tracking systems. In order to process high-resolution images, we optimize these two modules by parallel technique to enhance the performance. Experimental results show that the performance of the tracking system using the proposed approach can be increased about 52%.
近年来,许多研究者提出了基于IoT (Internet of Things)的智能系统。在这些智能系统中,最常见的应用之一就是智能监控系统。由于相机的发展,一些应用采用更高分辨率的图像来获得更准确的结果。因此,如何对这些高分辨率图像进行实时处理变得越来越重要。在本文中,我们设计了两个高效的库来检测和跟踪目标。背景减法和模板匹配技术是我们通常应用于目标检测和跟踪系统的基本方法。为了处理高分辨率图像,我们采用并行技术对这两个模块进行优化,以提高性能。实验结果表明,采用该方法的跟踪系统性能可提高约52%。
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引用次数: 10
A Study on Interference-Free Multicast in Multi-Channel Multi-Radio Multi-Rate Wireless Mesh Networks 多通道多无线电多速率无线网状网络中无干扰组播的研究
Pub Date : 2016-12-01 DOI: 10.1109/ICS.2016.0035
Wen-Lin Yang
In this paper, we investigate the problem concerning about how to construct an interference-free multicast tree in the multi-channel multi-radio multi-rate wireless mesh networks with the goal of maximizing the number of clients served by the tree. This problem is referred as the profit-based multi-rate multicast tree (PMMT) problem. With the joint consideration of multicast routing, channel assignment and transmitting data rate, a cross-layer based heuristic named the profit-oriented and multi-rate (POM) algorithm is proposed for the PMMT problem. A set of preliminary experiments is also provided for evaluating the performance of the POM algorithm.
本文研究了如何在多通道多无线电多速率无线网状网络中构造一棵无干扰的组播树,并以该树所服务的客户端数量最大化为目标。这个问题被称为基于利润的多速率组播树(PMMT)问题。针对PMMT问题,综合考虑组播路由、信道分配和传输数据速率等因素,提出了一种基于跨层启发式算法的利润导向多速率(POM)算法。本文还提供了一组初步的实验来评估POM算法的性能。
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引用次数: 3
期刊
2016 International Computer Symposium (ICS)
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