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2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing最新文献

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WAP over TETRA trial services 基于TETRA的WAP试用服务
2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing Pub Date : 2008-07-25 DOI: 10.1109/CSNDSP.2008.4610793
A. Štern, M. Volk, G. Kandus, T. Javornik, A. Hrovat, J. Bester
{"title":"WAP over TETRA trial services","authors":"A. Štern, M. Volk, G. Kandus, T. Javornik, A. Hrovat, J. Bester","doi":"10.1109/CSNDSP.2008.4610793","DOIUrl":"https://doi.org/10.1109/CSNDSP.2008.4610793","url":null,"abstract":"IP over TETRA is a solid and robust platform for secure and reliable data communications in the field of public safety and in for other PMR applications. In the paper the basic concepts of WAP application over TETRA network are presented. WAP over TETRA trial architecture is shown and an example of Web application ldquodangerous goodsrdquo is demonstrated. TETRA enhanced data services offered by TETRA release 2 are discussed and an introduction of the IP multimedia subsystem into the TETRA environment is given at the end of the paper.","PeriodicalId":241330,"journal":{"name":"2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122658331","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
Code design for coordinate interleaved coded cooperation 坐标交错编码合作的代码设计
2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing Pub Date : 2008-07-25 DOI: 10.1109/CSNDSP.2008.4610827
Özgür Oruç, U. Aygolu
{"title":"Code design for coordinate interleaved coded cooperation","authors":"Özgür Oruç, U. Aygolu","doi":"10.1109/CSNDSP.2008.4610827","DOIUrl":"https://doi.org/10.1109/CSNDSP.2008.4610827","url":null,"abstract":"In this paper, code design criteria for coded cooperation systems with coordinate interleaving are derived from pairwise error probability upper bounds. Optimum 4, 8 and 16-state trellis codes are designed by means of exhaustive computer search. The error performances of the new codes evaluated by the computer simulations show their superiority compared to the corresponding best space-time codes used in cooperation with coordinate interleaving.","PeriodicalId":241330,"journal":{"name":"2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123346616","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
Pulsed Digital Oscillators 脉冲数字振荡器
2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing Pub Date : 2008-07-25 DOI: 10.1109/CSNDSP.2008.4610805
M. Domínguez, J. Ricart, J. Pons, F. Rubio
{"title":"Pulsed Digital Oscillators","authors":"M. Domínguez, J. Ricart, J. Pons, F. Rubio","doi":"10.1109/CSNDSP.2008.4610805","DOIUrl":"https://doi.org/10.1109/CSNDSP.2008.4610805","url":null,"abstract":"The objective of this paper is to collect the main latest results on pulsed digital oscillators. Rigorous and experimental results are presented that show what kind of sequences are at their output, the relation between these sequences and those of first-order sigma-delta modulators and how is their performance in practical applications. A new variation of the standard topology of PDOs, on which the feedback variable is not position but the velocity of the resonator, is also presented. The first preliminary results obtained with a PDO working with a MEMS cantilever for chemical sensing are presented, which show that it is possible to infer the oscillation frequency directly from the bitstream at the output of the oscillator. Finally, the dependence of the oscillation frequency as a function of the initial conditions of the resonator are also analyzed with simulations.","PeriodicalId":241330,"journal":{"name":"2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127895474","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
Triple-wavelength fiber ring laser based on a hybrid gain medium actively mode-locked at 10 GHz 基于混合增益介质的10 GHz主动锁模三波长光纤环形激光器
2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing Pub Date : 2008-07-25 DOI: 10.1109/CSNDSP.2008.4610779
C. O'Riordan, M. Connelly, P. Anandarajah, R. Maher, L. Barry
{"title":"Triple-wavelength fiber ring laser based on a hybrid gain medium actively mode-locked at 10 GHz","authors":"C. O'Riordan, M. Connelly, P. Anandarajah, R. Maher, L. Barry","doi":"10.1109/CSNDSP.2008.4610779","DOIUrl":"https://doi.org/10.1109/CSNDSP.2008.4610779","url":null,"abstract":"A fiber ring laser based on a hybrid gain medium that produces three simultaneously mode-locked wavelength channels is presented. The lithium niobate based modulator used to actively mode-lock the laser cavity at 10 GHz is birefringence compensated to reduce its polarization sensitivity. A Lyot filter defines the lasers multiwavelength spectrum which has a wavelength spacing of 1 nm. The polarization sensitive nature of the laser cavity and its affect on the performance of the laser is discussed.","PeriodicalId":241330,"journal":{"name":"2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124551587","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
Physical architectures for packet-switching network nodes based on nonlinear logic gates 基于非线性逻辑门的分组交换网络节点物理体系结构
2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing Pub Date : 2008-07-25 DOI: 10.1109/CSNDSP.2008.4610753
H. Teimoori, D. Apostolopoulos, K. Vlachos, C. Ware, D. Petrantonakis, K. Yiannopoulos, L. Stampoulidis, H. Avramopoulos, D. Erasme
{"title":"Physical architectures for packet-switching network nodes based on nonlinear logic gates","authors":"H. Teimoori, D. Apostolopoulos, K. Vlachos, C. Ware, D. Petrantonakis, K. Yiannopoulos, L. Stampoulidis, H. Avramopoulos, D. Erasme","doi":"10.1109/CSNDSP.2008.4610753","DOIUrl":"https://doi.org/10.1109/CSNDSP.2008.4610753","url":null,"abstract":"Two new architectures are proposed for designing physical network nodes in packet-switched structures. They allow transparent optical packet networking and are based on the association of various subsystems, which have previously been proposed, and demonstrated. These elements are mainly based on the application of nonlinear behavior in semiconductor optical amplifiers.","PeriodicalId":241330,"journal":{"name":"2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124617392","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: 2
Facility location and mobile transactions in a university environment 大学环境中的设施位置和移动交易
2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing Pub Date : 2008-07-25 DOI: 10.1109/CSNDSP.2008.4610803
J. Bravo, R. Carrasco, B. Sharif, I. Soto
{"title":"Facility location and mobile transactions in a university environment","authors":"J. Bravo, R. Carrasco, B. Sharif, I. Soto","doi":"10.1109/CSNDSP.2008.4610803","DOIUrl":"https://doi.org/10.1109/CSNDSP.2008.4610803","url":null,"abstract":"In this paper a solution for the facility location problem is presented over an m-commerce infrastructure. An extensive comparison is performed for different scenario. Also delay studies and comparisons on m-transactions are carried out. Numeric and analytical results are presented.","PeriodicalId":241330,"journal":{"name":"2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121321049","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
Controlled loops: A new QoS differentiation framework for delay-sensitive OBS networks 可控环路:延迟敏感OBS网络的一种新的QoS区分框架
2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing Pub Date : 2008-07-25 DOI: 10.1109/CSNDSP.2008.4610755
J. Perelló, S. Spadaro, J. Comellas, G. Junyent
{"title":"Controlled loops: A new QoS differentiation framework for delay-sensitive OBS networks","authors":"J. Perelló, S. Spadaro, J. Comellas, G. Junyent","doi":"10.1109/CSNDSP.2008.4610755","DOIUrl":"https://doi.org/10.1109/CSNDSP.2008.4610755","url":null,"abstract":"This paper introduces a novel QoS differentiation framework for OBS networks. Two different methods are provided and subsequently validated. Particularly, both proposals aim at using controlled loops as deflection routes, which assures an upper bounded number of hops from source to destination. This yields a twofold outcome. First, the insufficient offset time problematic of standard deflection routing under just-enough-time (JET) is solved. Second, excessively long delays due to uncontrolled deflections are avoided. In both methods, the number of allowed loops is proposed as a QoS metric, giving support for class differentiation. This applies to a scenario with heterogeneous traffic demands, each one with different latency and burst loss requirements. The benefits of these proposals are quantified and further compared against existent alternatives by simulations.","PeriodicalId":241330,"journal":{"name":"2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123798884","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
Laser attenuation by falling snow 降雪对激光的衰减
2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing Pub Date : 2008-07-25 DOI: 10.1109/CSNDSP.2008.4610768
R. Nebuloni, C. Capsoni
{"title":"Laser attenuation by falling snow","authors":"R. Nebuloni, C. Capsoni","doi":"10.1109/CSNDSP.2008.4610768","DOIUrl":"https://doi.org/10.1109/CSNDSP.2008.4610768","url":null,"abstract":"The effect of snow on a FSO link is here addressed both theoretically and experimentally. Data collected during the snowfalls occurred in Milan, Italy, in the winter time of 2005 and 2006 are presented and discussed. It is shown that attenuation due to snow is not at all negligible because it could largely exceed the one caused by heavy rainstorms. Further, as in the case of rain events, the use of a visibility sensor is not appropriate to infer the correct fade levels experienced by the laser beam.","PeriodicalId":241330,"journal":{"name":"2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124140662","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: 29
Response time analysis for composite Web services 复合Web服务的响应时间分析
2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing Pub Date : 2008-07-25 DOI: 10.1109/CSNDSP.2008.4610706
S. Haddad, L. Mokdad, S. Youcef
{"title":"Response time analysis for composite Web services","authors":"S. Haddad, L. Mokdad, S. Youcef","doi":"10.1109/CSNDSP.2008.4610706","DOIUrl":"https://doi.org/10.1109/CSNDSP.2008.4610706","url":null,"abstract":"Service oriented computing (SOC) strives for applications with services as the fundamental items of design, and Web services acting as the enabling technology. Web services use open XML-based standards and are becoming the most important technology for communication between heterogeneous business applications over Internet. In this paper, we focus on mean response times. Thus we propose analytical formulas for mean response times for structured BPEL constructors such as sequence, flow and switch. We propose also a response time formula for multi-choice pattern which is a generalization of switch constructor. Contrarily to previous studies in the literature, we consider that the servers can be heterogeneous and the number of invoked elementary Web services can be variable.","PeriodicalId":241330,"journal":{"name":"2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126789186","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
System analysis of non-mechanical compact optical transceiver for wireless communications with a VCSEL array VCSEL阵列无线通信非机械紧凑型光收发器系统分析
2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing Pub Date : 2008-07-25 DOI: 10.4304/jcm.4.8.582-587
M. Toyoshima, N. Miyashita, Y. Takayama, H. Kunimori, S. Kimura
{"title":"System analysis of non-mechanical compact optical transceiver for wireless communications with a VCSEL array","authors":"M. Toyoshima, N. Miyashita, Y. Takayama, H. Kunimori, S. Kimura","doi":"10.4304/jcm.4.8.582-587","DOIUrl":"https://doi.org/10.4304/jcm.4.8.582-587","url":null,"abstract":"A non-mechanical, compact optical terminal equipped with a two-dimensional laser array is proposed. A laser beam is transmitted by selecting the laser pixel corresponding to the direction of the optical signal received from the counter terminal. The beams are not deflected by a mechanical mirror. Instead, they are turned on and off one after the other in accordance with the direction from which optical signals are received. Multiple-input multiple-output operation is possible in this configuration. The non-mechanical transceiver can facilitate a reduction in the size of the optical system. This paper presents the basic concept of a non-mechanical compact transceiver with a two-dimensional laser array for optical wireless communications.","PeriodicalId":241330,"journal":{"name":"2008 6th International Symposium on Communication Systems, Networks and Digital Signal Processing","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126086996","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
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