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2008 5th IFIP International Conference on Wireless and Optical Communications Networks (WOCN '08)最新文献

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Compensation of delay time uncertainties on industrial control ethernet networks using LMI based robust H∞ PID controller 基于LMI鲁棒H∞PID控制器的工业控制以太网时延不确定性补偿
2008 5th IFIP International Conference on Wireless and Optical Communications Networks (WOCN '08) Pub Date : 2008-05-05 DOI: 10.1109/WOCN.2008.4542491
E. Joelianto, H. Sutarto, A. Wicaksono
{"title":"Compensation of delay time uncertainties on industrial control ethernet networks using LMI based robust H∞ PID controller","authors":"E. Joelianto, H. Sutarto, A. Wicaksono","doi":"10.1109/WOCN.2008.4542491","DOIUrl":"https://doi.org/10.1109/WOCN.2008.4542491","url":null,"abstract":"Industrial Ethernet and wireless network become a common platform to implement industrial control in industries. Network control systems are subjected to delay time uncertainties due to the load traffic in the networks. As the PID controller is a major control algorithm in industries, this paper proposes a LMI based robust Hinfin PID controller using robust integral backstepping method to compensate the delay time uncertainties. To design using robust integral backstepping method, the plant and the PID controller are represented as a full state feedback control system in state space representation. The obtained parameters can then be used in the installed PID controller in the network based industrial control systems.","PeriodicalId":363625,"journal":{"name":"2008 5th IFIP International Conference on Wireless and Optical Communications Networks (WOCN '08)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123548440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Ultra wideband technology and its applications 超宽带技术及其应用
2008 5th IFIP International Conference on Wireless and Optical Communications Networks (WOCN '08) Pub Date : 2008-05-05 DOI: 10.1109/WOCN.2008.4542537
Y. Rahayu, T. A. Rahman, R. Ngah, P. Hall
{"title":"Ultra wideband technology and its applications","authors":"Y. Rahayu, T. A. Rahman, R. Ngah, P. Hall","doi":"10.1109/WOCN.2008.4542537","DOIUrl":"https://doi.org/10.1109/WOCN.2008.4542537","url":null,"abstract":"The demand for wireless wideband communications is rapidly increasing due to the need to support more users and to provide more information with higher data rates. Ultra wideband (UWB) technology based on the use of very narrow pulses on the order of nanoseconds, covering a very wide bandwidth in the frequency domain, could be a possible solution to this problem. UWB is a wireless technology developed to transfer data at high rates over very short distances at very low power densities and an area of immense current interest, with numerous potential applications. This paper presents the currently UWB technology and its potential applications. How this technology implemented without causing interference to other existing communication is also discussed. The advantages and disadvantages of this technology are looked into deep as well.","PeriodicalId":363625,"journal":{"name":"2008 5th IFIP International Conference on Wireless and Optical Communications Networks (WOCN '08)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124480162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 97
Optical networks design with multicriteria and open capacity analysis 基于多准则和开放容量分析的光网络设计
2008 5th IFIP International Conference on Wireless and Optical Communications Networks (WOCN '08) Pub Date : 2008-05-05 DOI: 10.1109/WOCN.2008.4542488
K. Assis, R.M.O. Santos, M. Freitas, H. Waldman
{"title":"Optical networks design with multicriteria and open capacity analysis","authors":"K. Assis, R.M.O. Santos, M. Freitas, H. Waldman","doi":"10.1109/WOCN.2008.4542488","DOIUrl":"https://doi.org/10.1109/WOCN.2008.4542488","url":null,"abstract":"The physical topology design (PTD) of optical networks is typically obtained as solution to a mixed integer linear program (MILP) that optimizes a performance measure, such as link length, total number of hops, maximum link load, number of wavelengths, etc. In this work, we investigate a multi- objective formulation to compute the Pareto set of solutions from static PTD or routing and wavelength assignment (RWA) problem. This approach allows a better perception of the gains and the losses of choosing any given solution. At last, we use a Pareto solution to preserve the open capacity of the network for the accommodation of future unknown demands.","PeriodicalId":363625,"journal":{"name":"2008 5th IFIP International Conference on Wireless and Optical Communications Networks (WOCN '08)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124612805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Tuning the dispersion and single/multi-modeness in a hole-assisted fiber: A finite-element study 孔辅助光纤中色散和单/多模态的调整:有限元研究
2008 5th IFIP International Conference on Wireless and Optical Communications Networks (WOCN '08) Pub Date : 2008-05-05 DOI: 10.1109/WOCN.2008.4542503
H. Uranus, H. Hoekstra, E. van Groesen
{"title":"Tuning the dispersion and single/multi-modeness in a hole-assisted fiber: A finite-element study","authors":"H. Uranus, H. Hoekstra, E. van Groesen","doi":"10.1109/WOCN.2008.4542503","DOIUrl":"https://doi.org/10.1109/WOCN.2008.4542503","url":null,"abstract":"Using a vectorial finite element mode solver developed earlier, we studied a hole-assisted multi-ring fiber. We report the role of the holes in tuning the waveguide dispersion and the single/multi-modeness of the particular fiber. By correctly selecting the hole's size and position, a single-mode fiber with a relatively flat and low dispersion in the S-band of the third telecom window was obtained. We also report the observation of a mode-type which has never been reported before for ordinary fibers, which we label as a \"ring\" mode. This mode exists as a consequence of structural symmetry breaking due to the inclusion of the microstructural holes.","PeriodicalId":363625,"journal":{"name":"2008 5th IFIP International Conference on Wireless and Optical Communications Networks (WOCN '08)","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127382046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A vertical Media-Independent Handover decision algorithm across Wi-Fi™ and WiMAX™ networks 跨Wi-Fi™和WiMAX™网络的垂直媒体独立切换决策算法
2008 5th IFIP International Conference on Wireless and Optical Communications Networks (WOCN '08) Pub Date : 2008-05-05 DOI: 10.1109/WOCN.2008.4542508
Shun-Fang Yang, Jung-Shyr Wu, Hsu-Hung Huang
{"title":"A vertical Media-Independent Handover decision algorithm across Wi-Fi™ and WiMAX™ networks","authors":"Shun-Fang Yang, Jung-Shyr Wu, Hsu-Hung Huang","doi":"10.1109/WOCN.2008.4542508","DOIUrl":"https://doi.org/10.1109/WOCN.2008.4542508","url":null,"abstract":"The hybrid networks of Wi-Fi and WiMAX networks can provide high data rate and enhanced multimedia services, but it is challenging to obtain optimized handover decision based dynamic QOS information. Users can improve their perceived QOS by using the terminal-controlled handover decision in a single device equipped with multiple radio interfaces. The IEEE 802.21 aims at providing a framework that defines Media Independent Handover (MIH) mechanism that supports seamless handover across heterogeneous networks. In this paper, we propose a handover decision algorithm using MIH services in Wi-Fi and WiMAX networks with QOS provision. The simulation results show that the proposed algorithm provides smaller handover times and lower dropping rate than the basic vertical handover method.","PeriodicalId":363625,"journal":{"name":"2008 5th IFIP International Conference on Wireless and Optical Communications Networks (WOCN '08)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125350562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 50
Performance evaluation of IEEE 802.15.4 for mobile sensor networks IEEE 802.15.4在移动传感器网络中的性能评估
2008 5th IFIP International Conference on Wireless and Optical Communications Networks (WOCN '08) Pub Date : 2008-05-05 DOI: 10.1109/WOCN.2008.4542536
K. Zen, D. Habibi, A. Rassau, I. Ahmad, E. Cowan
{"title":"Performance evaluation of IEEE 802.15.4 for mobile sensor networks","authors":"K. Zen, D. Habibi, A. Rassau, I. Ahmad, E. Cowan","doi":"10.1109/WOCN.2008.4542536","DOIUrl":"https://doi.org/10.1109/WOCN.2008.4542536","url":null,"abstract":"The IEEE 802.15.4 standard medium access control (MAC) protocol for low rate wireless personal area networks (LRWPAN) is design mainly for static sensor networks and its capability to support mobile sensor networks has not yet been established. To the best knowledge of authors, this is the first paper that evaluates the suitability of IEEE 802.15.4 MAC in mobile sensor networks environment. We evaluate the performance based on node's speed and beacon order, and observe the effect on energy usage, packet delivery ratio and time required to associate with its coordinator. From the experiment we observe that the moving nodes experienced serious problems in association and synchronization and show results on energy usage, throughput , association and reassociation rate with different speeds of moving node. We also identify some key research problems that need to be addressed for successful implementations of IEEE 802.15..4 in mobile sensor networks environment.","PeriodicalId":363625,"journal":{"name":"2008 5th IFIP International Conference on Wireless and Optical Communications Networks (WOCN '08)","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126793299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 74
Enhancing feasibility analysis of IEEE 802.5 Token Ring 增强IEEE 802.5令牌环的可行性分析
2008 5th IFIP International Conference on Wireless and Optical Communications Networks (WOCN '08) Pub Date : 2008-05-05 DOI: 10.1109/WOCN.2008.4542510
N. Min-Allah, M. Elahi, Jiansheng Xing, Yongji Wang
{"title":"Enhancing feasibility analysis of IEEE 802.5 Token Ring","authors":"N. Min-Allah, M. Elahi, Jiansheng Xing, Yongji Wang","doi":"10.1109/WOCN.2008.4542510","DOIUrl":"https://doi.org/10.1109/WOCN.2008.4542510","url":null,"abstract":"Schedulability analysis of real-time system has been a central focus of research in scheduling theory and a remarkable progress is made in recent years. This progress provides the opportunity to integrate these state of the art results into real-time networks, so that the analysis time for the feasibility of periodic messages is reduced. In this paper, we employ such advancement in the widely studied IEEE 802.5 protocol for scheduling real-time packets. Our technique avoids false points, the point (time) at which a particular packet is not schedulable, that arise during feasibility analysis and eventually the analysis is done more efficiently.","PeriodicalId":363625,"journal":{"name":"2008 5th IFIP International Conference on Wireless and Optical Communications Networks (WOCN '08)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126334410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Spectral efficiency comparison of two multirate O-CDMA schemes 两种多速率O-CDMA方案的频谱效率比较
2008 5th IFIP International Conference on Wireless and Optical Communications Networks (WOCN '08) Pub Date : 2008-05-05 DOI: 10.1109/WOCN.2008.4542480
Hung-Wei Chen, Guu-chang Yang, Cheng-Yuan Chang, W. Kwong
{"title":"Spectral efficiency comparison of two multirate O-CDMA schemes","authors":"Hung-Wei Chen, Guu-chang Yang, Cheng-Yuan Chang, W. Kwong","doi":"10.1109/WOCN.2008.4542480","DOIUrl":"https://doi.org/10.1109/WOCN.2008.4542480","url":null,"abstract":"Various multirate transmission techniques, such as the multiple-code (MC) and multicode-keying (MK) schemes, have been proposed for optical code division multiple access (O-CDMA) systems with multimedia services. In this paper, a metric of comparison, so-called the normalized spectral efficiency (NSE), is derived to compare, as a whole, the performance and system efficiency of these two schemes. The NSE of the conventional single-rate on-off-keying (OOK) O-CDMA scheme is also derived for a baseline comparison. Our numerical results show that the MC scheme always has larger NSE than the single-rate OOK scheme, while the MK scheme has the largest NSE under certain conditions.","PeriodicalId":363625,"journal":{"name":"2008 5th IFIP International Conference on Wireless and Optical Communications Networks (WOCN '08)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121171928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Low complexity subspace fitting method for wideband signal location 宽带信号定位的低复杂度子空间拟合方法
2008 5th IFIP International Conference on Wireless and Optical Communications Networks (WOCN '08) Pub Date : 2008-05-05 DOI: 10.1109/WOCN.2008.4542533
Jin Wang, Yongjun Zhao, Zhigang Wang
{"title":"Low complexity subspace fitting method for wideband signal location","authors":"Jin Wang, Yongjun Zhao, Zhigang Wang","doi":"10.1109/WOCN.2008.4542533","DOIUrl":"https://doi.org/10.1109/WOCN.2008.4542533","url":null,"abstract":"Weighted subspace fitting (WSF) method has superior performance compared to other subspace-based techniques in broadband signal location, but it is a heavy computational task. An adaptive Particle Swarm Optimization algorithm (PSO) is proposed to solve nonlinear global optimization problem of WSF. The multi-stage Wiener filter is applied to construct the aim function for complexity reduction. Since DOA is estimated without eigen-decomposition and multidimensional search is done in an intelligent way, significant reduction in complexity is achieved. Simulation results demonstrate the effectiveness of the proposed methods.","PeriodicalId":363625,"journal":{"name":"2008 5th IFIP International Conference on Wireless and Optical Communications Networks (WOCN '08)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131253165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
VPN over satellite: Performance improving of E2E secured TCP flows VPN over satellite:提高端到端安全TCP流的性能
2008 5th IFIP International Conference on Wireless and Optical Communications Networks (WOCN '08) Pub Date : 2008-05-05 DOI: 10.1109/WOCN.2008.4542482
A. Parichehreh, B. Eliasi
{"title":"VPN over satellite: Performance improving of E2E secured TCP flows","authors":"A. Parichehreh, B. Eliasi","doi":"10.1109/WOCN.2008.4542482","DOIUrl":"https://doi.org/10.1109/WOCN.2008.4542482","url":null,"abstract":"A unique characteristic of satellite networks, lying in their high Latency and high bit error rate, is their use of PEPs to improve the performance of some protocols such as TCP. However usage of end-to-end IPSec algorithms in VPNs, affects the TCP PEP's function as the encryption schemes hide the TCP header. One approach applicable to TCP PEPs is to generate a cryptographic hash of flow identification information. We propose a header compression method to improve the performance of the satellite based VPNs, using a similar hash value. Our approach also facilitates the TCP PEP and end-to-end IPSec coexistence.","PeriodicalId":363625,"journal":{"name":"2008 5th IFIP International Conference on Wireless and Optical Communications Networks (WOCN '08)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127925655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
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