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10Gbps bidirectional transmission GPON network based on single fiber 基于单光纤的10Gbps双向传输GPON网络
Pub Date : 2015-12-01 DOI: 10.1109/ICET.2015.7389193
Taifoor Ul Islam, A. Hussain, S. S. Ashraf
We proposed and demonstrated a bidirectional GPON architecture supporting 10Gbps data transmission through single fiber cable network. Data is transmitted utilizing a Non Return to Zero Differential Phase Shift Keying (NRZ-DPSK) and re-modulate the downstream signal using intensity modulator (on-off keying OOK) in Return to Zero (RZ) format to transmit upstream data, supporting data rate of 10Gbps/channel is an optimized network in full duplex mode. Simulation results confirmed that successful transmission using 50GHz channel spacing is achieved over a distance of 25km.
我们提出并演示了一种双向GPON架构,支持通过单光纤电缆网络传输10Gbps数据。数据传输采用不归零差分相移键控(NRZ-DPSK),下游信号使用强度调制器(开关键控OOK)以归零(RZ)格式重新调制传输上游数据,支持10Gbps/信道的数据速率,是全双工模式下的优化网络。仿真结果证实,利用50GHz信道间距,在25km的距离上实现了成功的传输。
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引用次数: 4
High Q-factor photonic crystal cavities 高q因子光子晶体腔
Pub Date : 2015-12-01 DOI: 10.1109/ICET.2015.7389173
A. Khan, A. Khan
The optical properties of two dimensional photonic crystal cavities are numerically investigated. The cavities are designed by introducing defects in the structure, which will break the periodicity of photonic crystal. It is established that the resonant modes trapped in the cavity can be well controlled by varying the nature and size of the cavity. The field distribution and the Q-factor of the trap resonant modes in the cavity are computed. It is found that the Q-factor of the resonant modes can be made very large by increasing the size of the crystal.
对二维光子晶体腔的光学特性进行了数值研究。通过在结构中引入缺陷来设计空腔,从而打破光子晶体的周期性。通过改变腔体的性质和大小,可以很好地控制腔体中的谐振模式。计算了腔内阱谐振模式的场分布和q因子。通过增大晶体的尺寸,可以使共振模式的q因子变得很大。
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引用次数: 1
Quality of Service aware dynamic BBU-RRH mapping in Cloud Radio Access Network 云无线接入网中服务质量感知的动态BBU-RRH映射
Pub Date : 2015-12-01 DOI: 10.1109/ICET.2015.7389166
M. Khan, R. Alhumaima, H. Al-Raweshidy
Cloud Radio Access Network (C-RAN) is considered to be the candidate for enabling the next generation mobile communication networks (5G). C-RAN has the ability to dynamically adjust the logical connections between the BBUs and RRHs according to traffic conditions. This paper explores the capacity routing ability of C-RAN to enable load balancing in the network. A self organised C-RAN is proposed and formulated as an optimisation problem, which aims to balance network traffic by reducing the number of blocked calls in the network and improving the QoS. The QoS in this paper is represented by a KPI, which is the inverse of blocked calls. A Genetic Algorithm is proposed for optimisation. A scenario of 19 RRHs distributed over a geographical area is considered. The RRHs are managed by 2 BBUs in the pool. The RRHs are divided into 6 sectors with each BBU handling 3 sectors. The initial BBU-RRH configuration causes 80 blocked calls in the entire network with a QoS evaluation value of 0.0125. After performing the algorithm, it is observed that the network is balanced by reconfiguring the BBU-RRH connections, finding the optimum solution, reducing the blocked calls to zero and improving the QoS of the network i.e., QoS=1.
云无线接入网(C-RAN)被认为是实现下一代移动通信网络(5G)的候选网络。C-RAN能够根据交通情况动态调整bbu与RRHs之间的逻辑连接。本文探讨了C-RAN的容量路由能力,以实现网络中的负载均衡。提出了一种自组织的C-RAN,并将其作为一个优化问题,旨在通过减少网络中阻塞呼叫的数量和提高QoS来平衡网络流量。本文中的QoS由KPI表示,KPI是阻塞调用的倒数。提出了一种遗传算法进行优化。考虑在一个地理区域内分布19个rrh的情景。rrh由池中的2个bbu管理。rrh分为6个扇区,每个BBU处理3个扇区。初始配置的BBU-RRH导致全网阻塞呼叫80个,QoS评价值为0.0125。执行算法后,可以观察到网络通过重新配置BBU-RRH连接,找到最优解决方案,将阻塞呼叫减少到零,提高网络的QoS (QoS=1)来实现平衡。
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引用次数: 23
Performance comparison of Impulse Radio Ultra Wideband receivers 脉冲无线电超宽带接收机的性能比较
Pub Date : 2015-12-01 DOI: 10.1109/ICET.2015.7389218
Pir Meher Ali Shah, Latif Jan, M. Waqas
Ultra Wideband (UWB) is a communication technique that uses a very narrow radio pulses for communication over a large bandwidth between transmitter and receiver. UWB technique is gaining popularity day by day because of its certain characteristics like simple architecture, cost reliability and low power consumption which is quite desirable in the field of short range wireless communication. Transmitting such a short duration pulses in a multipath environment create a critical problem in designing the transceiver for Impulse Radio (IR) UWB systems. Several research activities have been carried on for effective and efficient transmission of very short duration pulses for IR-UWB systems. Here, in the this paper, we presented a performance comparison between Transmitted Reference (TR), Multi differential frequency shift reference(MD-FSR) and code shift reference (CSR) which are the three primary pulse sending techniques in UWB communication. These techniques have been evaluated by comparing its systems BER performance. Simulations have been performed in MATLAB. The simulation results validate that CSR-UWB system has a better BER performance compared to TR and MD-FSR UWB systems under the desired parameters.
超宽带(UWB)是一种使用非常窄的无线电脉冲在发射机和接收机之间进行大带宽通信的通信技术。超宽带技术以其结构简单、成本可靠、功耗低等特点,在短距离无线通信领域得到越来越广泛的应用。在多径环境下传输如此短持续时间的脉冲给脉冲无线电(IR)超宽带系统的收发器设计带来了一个关键问题。为了实现短波脉冲在红外-超宽带系统中的有效和高效传输,已经进行了一些研究活动。本文对UWB通信中三种主要的脉冲发送技术——发射基准(TR)、多差分频移基准(MD-FSR)和码移基准(CSR)进行了性能比较。通过比较其系统的误码率性能,对这些技术进行了评估。在MATLAB中进行了仿真。仿真结果验证了在期望参数下,CSR-UWB系统比TR和MD-FSR UWB系统具有更好的误码率性能。
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引用次数: 1
Robust control of a customized robotic arm with unstructured uncertainties 具有非结构不确定性的定制机械臂鲁棒控制
Pub Date : 2015-12-01 DOI: 10.1109/ICET.2015.7389204
T. Qaisar, A. Mahmood
Owing to the recent advancement in the field of `Robotics', the use of robots can now be modified to fit our own requirements. A potential field of expansion in this domain is the design and implementation of prosthetic limbs. In this paper we discuss the robust control of a customized robotic gripper arm. We also incorporate unstructured uncertainties and analyze responses of both H2 and H∞ compensators. This comparison show the advantage of integrating the aforementioned compensators on system stability.
由于最近在“机器人技术”领域的进步,机器人的使用现在可以修改,以满足我们自己的要求。这一领域的一个潜在扩展领域是假肢的设计和实现。本文讨论了一种定制机器人抓取臂的鲁棒控制问题。我们还考虑了非结构化不确定性,并分析了H2和H∞补偿器的响应。这一比较表明了集成上述补偿器对系统稳定性的好处。
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引用次数: 4
mSCTP & P2P (2-layered CHORD) supported decentralized seamless mobility framework 支持mSCTP和P2P(2层CHORD)的去中心化无缝移动框架
Pub Date : 2015-12-01 DOI: 10.1109/ICET.2015.7389214
Aizaz Ullah
To get overall advantages of the omnipresent mobile computing, Mobile Node (MN) should be capable to move seamlessly through various networks. But the Internet Protocol (IP) address of the remote Mobile Nodes should be considered in specific time duration, prior to the blockage of services. In 3G, 4G and LAN technologies, it is needed to have a proficient system for location management that accepts the dynamic environments and add issues as failure based on central point, latency and deficiency of consistency. One way is to utilize CHORD for location management that is decentralized, and its key value mapping should better consider to IP mapping, the desired name. But the main problem regarding this mechanism is the existence of chord nodes that are not stable, and this creates instability in the framework. Nodes having low computation abilities can retard the look-up technique and thus ends the active session. Here we give a solution to the issue, utilizing two-layered CHORD design against single Layered CHORD. Nodes having high computation capabilities and stability will perform as location servers, and will be liable for saving and allocation the temporary locators that is IP address of the remote MN. Appropriation of suggested framework is analyzed utilizing analytical analysis in distinguished with current CHORD mobility protocol. The said way can stabilizes the framework using its de-centralizing feature, yet intact.
为了获得无处不在的移动计算的整体优势,移动节点(MN)应该能够在各种网络中无缝移动。但远程移动节点的IP (Internet Protocol)地址应该在特定的时间段内考虑,以免业务中断。在3G、4G和LAN技术中,需要有一个熟练的位置管理系统,能够接受动态环境,增加基于中心点的故障、延迟、一致性不足等问题。一种方法是利用CHORD进行分散的位置管理,它的键值映射应该更好地考虑到IP映射,所需的名称。但是这种机制的主要问题是存在不稳定的弦节点,这在框架中造成了不稳定。计算能力低的节点可能会延迟查找技术,从而结束活动会话。在这里,我们给出了一个解决方案,利用双层CHORD设计来对抗单层CHORD。具有较高计算能力和稳定性的节点作为位置服务器,负责保存和分配临时定位器,即远程MN的IP地址。利用解析分析方法对建议框架的占用进行了分析,并与现有的CHORD迁移协议进行了区分。上述方法可以利用其去中心化特性来稳定框架,但不受影响。
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引用次数: 1
An evaluation of software fault tolerance techniques for optimality 软件容错技术的最优性评价
Pub Date : 2015-12-01 DOI: 10.1109/ICET.2015.7389208
M. Rizwan, A. Nadeem, Muhammad Bilal Ahmad Khan
Chances of occurrence of fault increases when program goes beyond few thousand lines, even with the use of formal methods for fault prevention. These faults need very exhaustive testing to be removed, which is infeasible. This implies the indispensability of software fault tolerance (SFT) before facing the consequences of faults. Since 1972, several different SFT techniques have been proposed. But still occurrence of failures imply the failure of existing SFT techniques in considering all the required parameters. In this paper we analyze 16 replication based SFT techniques proposed after 1972 that have long-term influence or some paramount significance. We put them in classification based upon diversity they offer, adjudication mechanism they use & whether or not they are adaptive. Then we catalog the essential parameters for optimal adjudication, diversity & adaptiveness along with suggestions to incorporate those parameters. Finally, we map the listed techniques on these parameters. We came up with the result that none amongst the existing technique addresses all the essential parameters. This paper serves as a touch stone to evaluate any SFT technique & provides substantial guide for the researchers in proposing new SFT technique.
当程序超过几千行时,即使使用正式的方法来预防故障,发生故障的机会也会增加。这些故障需要非常详尽的测试才能消除,这是不可行的。这意味着在面对故障的后果之前,软件容错(SFT)是不可或缺的。自1972年以来,已经提出了几种不同的SFT技术。但是,故障的发生仍然意味着现有的SFT技术在考虑所有所需参数方面的失败。本文分析了1972年以后提出的16种具有长期影响或重要意义的基于复制的SFT技术。我们根据它们提供的多样性、它们使用的裁决机制以及它们是否具有适应性来对它们进行分类。然后,我们对最佳裁决的基本参数、多样性和适应性进行了编目,并提出了将这些参数纳入其中的建议。最后,我们将列出的技术映射到这些参数上。我们得出的结果是,现有的技术中没有一个能解决所有的基本参数。本文可以作为评价任何SFT技术的试金石,并为研究人员提出新的SFT技术提供了实质性的指导。
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引用次数: 5
A comparative study of target tracking with Kalman filter, extended Kalman filter and particle filter using received signal strength measurements 利用接收信号强度测量对卡尔曼滤波、扩展卡尔曼滤波和粒子滤波进行了目标跟踪的比较研究
Pub Date : 2015-12-01 DOI: 10.1109/ICET.2015.7389222
M. Khan, N. Salman, A. Ali, A. Khan, A. Kemp
Tracking of wireless nodes such as robots in wireless sensor network (WSN) has been widely studied in literature. Most of these studies are based on the Kalman filter (KF) for linear models corrupted by Gaussian noise, the extended Kalman filter (EKF) for non linear models and the particles filter (PF) which does no require the model o be linear nor the noise be Gaussian. In his paper, we present a comparative study of mobile target node (TN) racking via the KF, EKF and PF based on the received power of the signal. A constant velocity model is considered for the motion of TN, depicting an indoor environment. The performance of the filters are compared in terms of the root mean square error (RMSE). Extensive simulations are performed to evaluate the performance of the discussed filters.
无线传感器网络(WSN)中机器人等无线节点的跟踪问题已得到广泛的研究。这些研究大多是基于卡尔曼滤波(KF)来处理受高斯噪声破坏的线性模型,扩展卡尔曼滤波(EKF)来处理非线性模型,以及粒子滤波(PF),它既不要求模型是线性的,也不要求噪声是高斯的。本文对基于接收信号功率的KF、EKF和PF对移动目标节点(TN)的跟踪进行了比较研究。对于TN的运动,考虑了一个恒定的速度模型,描绘了一个室内环境。根据均方根误差(RMSE)对滤波器的性能进行了比较。进行了大量的仿真来评估所讨论的滤波器的性能。
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引用次数: 30
Performance assessment of an on-grid 178.08kW Photovoltaic system Islamabad, Pakistan 178.08kW并网光伏系统性能评估巴基斯坦伊斯兰堡
Pub Date : 2015-12-01 DOI: 10.1109/ICET.2015.7389174
S. M. H. Bukhari, P. Akhter, A. Mehmood
It is anticipated that renewable energy will meet a considerable fraction of future energy demands of Pakistan. Since solar energy is abundant in most parts of the country, on grid solar PV systems are becoming increasingly important. Electric energy provided by the solar power plant to the grid depends upon seasonal variation of the solar resource, losses by temperature changes, system losses and losses due to grid conditions. This paper presents the monitoring result of a 178.08 kW grid connected photovoltaic system installed in Pakistan engineering commission, Islamabad (Longitude 73.0667° & Latitude E 33.7167° N). System was monitored between Jan 2013 to Dec 2013. Daily solar irradiation, ambient temperature, wind speed, daily power generation were measured and analyzed during this monitoring period. Performance ratio manually calculated from the recorded data is 0.63. Furthermore, the PV performance was studied by performance ratio variation with solar inclined irradiation. Average monthly performance ratio was found to be decreasing with increasing ambient temperature and solar inclined irradiation. A decreasing trend in AC power was seen with rise in temperature and conversion losses.
预计可再生能源将满足巴基斯坦未来能源需求的相当一部分。由于我国大部分地区太阳能资源丰富,并网太阳能光伏系统变得越来越重要。太阳能发电厂向电网提供的电能取决于太阳能资源的季节变化、温度变化造成的损耗、系统损耗和电网条件造成的损耗。本文介绍了安装在巴基斯坦工程委员会伊斯兰堡(经度73.0667°和东经33.7167°N)的178.08 kW并网光伏系统在2013年1月至2013年12月期间的监测结果。对监测期间的日太阳辐照度、环境温度、风速、日发电量进行了测量和分析。手动计算的性能比为0.63。在此基础上,研究了太阳能倾斜辐照下光伏性能比的变化规律。月平均性能比随环境温度的升高和太阳倾斜照射的增加而降低。随着温度和转换损耗的升高,交流功率呈下降趋势。
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引用次数: 1
Makespan as a design tool for CMS design Makespan作为CMS设计的设计工具
Pub Date : 2015-12-01 DOI: 10.1109/ICET.2015.7389194
Ayesha Maroof, A. Tariq, S. Maqsood
Industries have to cope with millions of parts for production on daily basis. Scheduling of those parts for production is a complex process. Parts having properly scheduled processing rarely get delayed and therefore generally delivered on time. Cellular Manufacturing System (CMS) is a proficient production system and can be used as an effective replacement of Batch type manufacturing. Cell Formation (CF) is the fundamental part of Cell design and its effectiveness is checked using a performance index called Grouping Efficacy (GE).Part scheduling is very rarely used as a design tool for Cell Formation Problem (CFP). A software based solution is developed in this research to solve CFP by applying Genetic Algorithm (GA), which is an Artificial Intelligence (AI) technique. The uniqueness of this approach is that it presents an integrated approach for grouping parts into families and machines into cells using Makespan as the performance factor. Results show that minimizing the Make span maximizes the GE.
工业每天都要处理数以百万计的零件。这些零件的生产调度是一个复杂的过程。经过适当安排处理的零件很少会延迟,因此通常会按时交付。元胞制造系统(CMS)是一种熟练的生产系统,可以有效地替代批量生产。细胞形成(CF)是细胞设计的基本部分,其有效性是通过称为分组效率(GE)的性能指标来检查的。零件调度很少被用作单元形成问题(CFP)的设计工具。本研究开发了一种基于软件的解决方案,利用遗传算法求解CFP,这是一种人工智能(AI)技术。这种方法的独特之处在于,它提出了一种集成的方法,将部件分组为家族,将机器分组为单元,使用Makespan作为性能因素。结果表明,最小的Make跨度使GE最大化。
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引用次数: 0
期刊
2015 International Conference on Emerging Technologies (ICET)
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