2000 10th Mediterranean Electrotechnical Conference. Information Technology and Electrotechnology for the Mediterranean Countries. Proceedings. MeleCon 2000 (Cat. No.00CH37099)最新文献
Pub Date : 2000-05-29DOI: 10.1109/MELCON.2000.880419
H. Leligou, J. Sifnaios, G. Pikrammenos
Tree-shaped topologies present attractive cost advantages for broadband access networks by allowing many customers to share the expensive head-end equipment and the feeder section and provide a graceful upgrade path towards the photoionization of the local loop. In addition they offer reuse of the copper last drops to the customer at least during the crucial introductory phase and probably for many years to come. Typical examples are hybrid fiber coaxial (HFC) and passive optical network (PON) systems. The TDMA multiplexing of traffic entering such a system is governed by the MAC protocol, which arbitrates the allocation of bandwidth to the shared feeder. At the same time the need to integrate telecom services presenting different quality requirements with plain best effort services over the same infrastructure brings new issues to the design of such an access mechanism. The MAC protocol as the only arbiter of the upstream bandwidth directly affects the QoS provided to each upstream traffic flow and must meet several constraints. Such constraints include the adequate speed of operation exploiting in the highest degree the speed of H/W implementation, flexibility to support efficiently the largest number of services and applications offering an adequate number of QoS classes and independence of higher layers, protocols and future extensions to traffic management specifications. The implementation of a MAC protocol targeting these goals in the framework of the AROMA research system is presented in this paper. We discuss the details and the implementation cost of the solutions followed and we evaluate the implemented mechanisms using computer simulation.
{"title":"Hardware implementation of multimedia driven HFC MAC protocol","authors":"H. Leligou, J. Sifnaios, G. Pikrammenos","doi":"10.1109/MELCON.2000.880419","DOIUrl":"https://doi.org/10.1109/MELCON.2000.880419","url":null,"abstract":"Tree-shaped topologies present attractive cost advantages for broadband access networks by allowing many customers to share the expensive head-end equipment and the feeder section and provide a graceful upgrade path towards the photoionization of the local loop. In addition they offer reuse of the copper last drops to the customer at least during the crucial introductory phase and probably for many years to come. Typical examples are hybrid fiber coaxial (HFC) and passive optical network (PON) systems. The TDMA multiplexing of traffic entering such a system is governed by the MAC protocol, which arbitrates the allocation of bandwidth to the shared feeder. At the same time the need to integrate telecom services presenting different quality requirements with plain best effort services over the same infrastructure brings new issues to the design of such an access mechanism. The MAC protocol as the only arbiter of the upstream bandwidth directly affects the QoS provided to each upstream traffic flow and must meet several constraints. Such constraints include the adequate speed of operation exploiting in the highest degree the speed of H/W implementation, flexibility to support efficiently the largest number of services and applications offering an adequate number of QoS classes and independence of higher layers, protocols and future extensions to traffic management specifications. The implementation of a MAC protocol targeting these goals in the framework of the AROMA research system is presented in this paper. We discuss the details and the implementation cost of the solutions followed and we evaluate the implemented mechanisms using computer simulation.","PeriodicalId":151424,"journal":{"name":"2000 10th Mediterranean Electrotechnical Conference. Information Technology and Electrotechnology for the Mediterranean Countries. Proceedings. MeleCon 2000 (Cat. No.00CH37099)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125790380","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}
Pub Date : 2000-05-29DOI: 10.1109/MELCON.2000.880013
N. Pavesic, S. Ribaric
Investigating the Kapur et al. (1985) image thresholding method, we found, that taking the sum of the Havrda and Charvat entropies as a criterion for threshold selection instead of the Shannon entropies, can result in a better image segmentation in the sense of greater uniformity of the partitioned segments, as well as greater contrast among segments.
{"title":"Gray level thresholding using the Havrda and Charvat entropy","authors":"N. Pavesic, S. Ribaric","doi":"10.1109/MELCON.2000.880013","DOIUrl":"https://doi.org/10.1109/MELCON.2000.880013","url":null,"abstract":"Investigating the Kapur et al. (1985) image thresholding method, we found, that taking the sum of the Havrda and Charvat entropies as a criterion for threshold selection instead of the Shannon entropies, can result in a better image segmentation in the sense of greater uniformity of the partitioned segments, as well as greater contrast among segments.","PeriodicalId":151424,"journal":{"name":"2000 10th Mediterranean Electrotechnical Conference. Information Technology and Electrotechnology for the Mediterranean Countries. Proceedings. MeleCon 2000 (Cat. No.00CH37099)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114175311","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}
Pub Date : 2000-05-29DOI: 10.1109/MELCON.2000.880364
Adrian Gogu, Marina Topa
This paper presents the coefficients' computation method for implementing a digital reverberator based on the algorithm proposed by Jean-Marc Jot (1997). Applying the source image method the impulse response of a certain room can be derived, which approximates, especially for low frequency, the early reflections part of the natural impulse response. Considering the taps resulted from the mentioned method, a solution for Jot's reverberator design is offered, generating the early reflections and the desired shape for the late reverberation part. The method uses some approximations, which do not affect significantly the perception of the reverberated sound.
{"title":"Coefficients' computation for Jot's reverberation algorithm","authors":"Adrian Gogu, Marina Topa","doi":"10.1109/MELCON.2000.880364","DOIUrl":"https://doi.org/10.1109/MELCON.2000.880364","url":null,"abstract":"This paper presents the coefficients' computation method for implementing a digital reverberator based on the algorithm proposed by Jean-Marc Jot (1997). Applying the source image method the impulse response of a certain room can be derived, which approximates, especially for low frequency, the early reflections part of the natural impulse response. Considering the taps resulted from the mentioned method, a solution for Jot's reverberator design is offered, generating the early reflections and the desired shape for the late reverberation part. The method uses some approximations, which do not affect significantly the perception of the reverberated sound.","PeriodicalId":151424,"journal":{"name":"2000 10th Mediterranean Electrotechnical Conference. Information Technology and Electrotechnology for the Mediterranean Countries. Proceedings. MeleCon 2000 (Cat. No.00CH37099)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122892594","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}
Pub Date : 2000-05-29DOI: 10.1109/MELCON.2000.879723
R. A. Guinee
Normal and inverse repeat pseudorandom binary sequences (PRBS) are very effective as persistent excitation stimuli in dynamic testing and parameter extraction in motor drive systems. In general a simple linear time invariant (LTI) second order transfer function model can he deployed in conjunction with PRBS correlation methods for adjustable speed drive (ASD) parameter identification. Very accurate parameter extraction from correlation based impulse response evaluation is achieved using data training records from pseudonoise (pN) testing, in both the online and off-line mode of operation of a PWM controlled variable speed DC motor drive system. The alternative approach of motor parameter extraction from spectral analysis, based on sinusoidal test signals, is used for comparison purposes as a secondary check on the effectiveness and accuracy of the PBBS method and to validate the LTI model used.
{"title":"Variable speed motor drive testing and parameter identification using pseudorandom binary sequences","authors":"R. A. Guinee","doi":"10.1109/MELCON.2000.879723","DOIUrl":"https://doi.org/10.1109/MELCON.2000.879723","url":null,"abstract":"Normal and inverse repeat pseudorandom binary sequences (PRBS) are very effective as persistent excitation stimuli in dynamic testing and parameter extraction in motor drive systems. In general a simple linear time invariant (LTI) second order transfer function model can he deployed in conjunction with PRBS correlation methods for adjustable speed drive (ASD) parameter identification. Very accurate parameter extraction from correlation based impulse response evaluation is achieved using data training records from pseudonoise (pN) testing, in both the online and off-line mode of operation of a PWM controlled variable speed DC motor drive system. The alternative approach of motor parameter extraction from spectral analysis, based on sinusoidal test signals, is used for comparison purposes as a secondary check on the effectiveness and accuracy of the PBBS method and to validate the LTI model used.","PeriodicalId":151424,"journal":{"name":"2000 10th Mediterranean Electrotechnical Conference. Information Technology and Electrotechnology for the Mediterranean Countries. Proceedings. MeleCon 2000 (Cat. No.00CH37099)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127674459","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}
Pub Date : 2000-05-29DOI: 10.1109/MELCON.2000.880073
D. Dres, P. Constantinou, A. Kastereli
The paper examines the conditions under which analog television and a spread spectrum system can share spectrum. After a preliminary assessment and a limited number of laboratory measurements which support the conclusions of the paper, the paper concludes that the interference caused by a constant amplitude spread spectrum system should be comparable to that caused by a conventional, narrowband FM signal of same total power, provided the spread spectrum signal has an RF bandwidth less than 2 MHz. With spectrum spreads greater than 8 MHz the spread spectrum system should have some advantage. Furthermore, in order to examine the interference caused by the TV signal in the spread spectrum system a simple mathematical equation representing the power spectrum of the TV signal is derived, and a general formulation of the bit error rate of a conventional BPSK/QPSK spread spectrum system is represented.
{"title":"Spectral overlay of spread spectrum broadcasting system for digital video delivery on analog TV band: a preliminary estimate","authors":"D. Dres, P. Constantinou, A. Kastereli","doi":"10.1109/MELCON.2000.880073","DOIUrl":"https://doi.org/10.1109/MELCON.2000.880073","url":null,"abstract":"The paper examines the conditions under which analog television and a spread spectrum system can share spectrum. After a preliminary assessment and a limited number of laboratory measurements which support the conclusions of the paper, the paper concludes that the interference caused by a constant amplitude spread spectrum system should be comparable to that caused by a conventional, narrowband FM signal of same total power, provided the spread spectrum signal has an RF bandwidth less than 2 MHz. With spectrum spreads greater than 8 MHz the spread spectrum system should have some advantage. Furthermore, in order to examine the interference caused by the TV signal in the spread spectrum system a simple mathematical equation representing the power spectrum of the TV signal is derived, and a general formulation of the bit error rate of a conventional BPSK/QPSK spread spectrum system is represented.","PeriodicalId":151424,"journal":{"name":"2000 10th Mediterranean Electrotechnical Conference. Information Technology and Electrotechnology for the Mediterranean Countries. Proceedings. MeleCon 2000 (Cat. No.00CH37099)","volume":"195 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123013138","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}
Pub Date : 2000-05-29DOI: 10.1109/MELCON.2000.880408
C. Pantjiaros, C. Combes, R. van Wolfswinkel, P. McDonagh, K.I. Sletta, S. Panis, N. Charalambous
The specification of a cost-effective full services access network (FSAN) has been the target and ambition of telecommunications operators. With such fully managed architecture the telecommunications operator can be sure of providing the variety of narrowband and broadband services including digital broadcast services, video on demand, IP services and traditional telecommunication services including POTs, ISDN, ATM and circuit emulation. In 1999, EURESCOM has launched the BOBAN project which considers the evaluation and testing of new broadband access technologies in a field, or lab trial environment. A primary consideration is the evaluation of FSAN-like systems and the interconnection to service platforms for the provisioning of symmetric and asymmetric broadband services, including point-to-point and point-to-multipoint broadcast services. More specifically, the scope of part of this program is to evaluate, in the field or laboratory, FTTCab/B/H solutions with connections to service platforms. The document presents a description of this on-going project.
{"title":"Broadband services delivery over an ATM PON FTTx system","authors":"C. Pantjiaros, C. Combes, R. van Wolfswinkel, P. McDonagh, K.I. Sletta, S. Panis, N. Charalambous","doi":"10.1109/MELCON.2000.880408","DOIUrl":"https://doi.org/10.1109/MELCON.2000.880408","url":null,"abstract":"The specification of a cost-effective full services access network (FSAN) has been the target and ambition of telecommunications operators. With such fully managed architecture the telecommunications operator can be sure of providing the variety of narrowband and broadband services including digital broadcast services, video on demand, IP services and traditional telecommunication services including POTs, ISDN, ATM and circuit emulation. In 1999, EURESCOM has launched the BOBAN project which considers the evaluation and testing of new broadband access technologies in a field, or lab trial environment. A primary consideration is the evaluation of FSAN-like systems and the interconnection to service platforms for the provisioning of symmetric and asymmetric broadband services, including point-to-point and point-to-multipoint broadcast services. More specifically, the scope of part of this program is to evaluate, in the field or laboratory, FTTCab/B/H solutions with connections to service platforms. The document presents a description of this on-going project.","PeriodicalId":151424,"journal":{"name":"2000 10th Mediterranean Electrotechnical Conference. Information Technology and Electrotechnology for the Mediterranean Countries. Proceedings. MeleCon 2000 (Cat. No.00CH37099)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124536656","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}
Pub Date : 2000-05-29DOI: 10.1109/MELCON.2000.880033
Y. Grishin, A. Zankiewicz
A new compression filter for binary coded wideband digital signals with sidelobe reduction capabilities using a feedforward time-delay neural network is considered. This filter uses powers-of-two synaptic weights and the backpropagation learning algorithm. Using digital hardware implementation of such a filter for pulse compression is easier owing to elimination of multipliers. The simulation results showed that the time sidelobes of the output signal can be reduced up to about 60 dB. The quantization of the filter weights causes additional losses of about 6-14 dB depending on the input signal to noise ratio.
{"title":"A neural network sidelobe suppression filter for a pulse-compression radar with powers-of-two weights","authors":"Y. Grishin, A. Zankiewicz","doi":"10.1109/MELCON.2000.880033","DOIUrl":"https://doi.org/10.1109/MELCON.2000.880033","url":null,"abstract":"A new compression filter for binary coded wideband digital signals with sidelobe reduction capabilities using a feedforward time-delay neural network is considered. This filter uses powers-of-two synaptic weights and the backpropagation learning algorithm. Using digital hardware implementation of such a filter for pulse compression is easier owing to elimination of multipliers. The simulation results showed that the time sidelobes of the output signal can be reduced up to about 60 dB. The quantization of the filter weights causes additional losses of about 6-14 dB depending on the input signal to noise ratio.","PeriodicalId":151424,"journal":{"name":"2000 10th Mediterranean Electrotechnical Conference. Information Technology and Electrotechnology for the Mediterranean Countries. Proceedings. MeleCon 2000 (Cat. No.00CH37099)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128676491","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}
Pub Date : 2000-05-29DOI: 10.1109/MELCON.2000.880055
S. Amon, D. Vrtacnik, D. Rsnik, D. Križaj, U. Aljancic, M. Mozek
A new PTAT temperature sensor is studied. Sensor structure is based on the recently introduced SJFET approach, enabling device isolation/integration on the same chip and being compatible with micromachining. The approach is based on the well-established discrete silicon device bipolar technology. Test PTAT structures were designed, fabricated and characterized. Measurements on fabricated test PTAT structures revealed good sensitivity, stability and linearity of sensor response.
{"title":"PTAT sensors based on SJFETs","authors":"S. Amon, D. Vrtacnik, D. Rsnik, D. Križaj, U. Aljancic, M. Mozek","doi":"10.1109/MELCON.2000.880055","DOIUrl":"https://doi.org/10.1109/MELCON.2000.880055","url":null,"abstract":"A new PTAT temperature sensor is studied. Sensor structure is based on the recently introduced SJFET approach, enabling device isolation/integration on the same chip and being compatible with micromachining. The approach is based on the well-established discrete silicon device bipolar technology. Test PTAT structures were designed, fabricated and characterized. Measurements on fabricated test PTAT structures revealed good sensitivity, stability and linearity of sensor response.","PeriodicalId":151424,"journal":{"name":"2000 10th Mediterranean Electrotechnical Conference. Information Technology and Electrotechnology for the Mediterranean Countries. Proceedings. MeleCon 2000 (Cat. No.00CH37099)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115840199","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}
Pub Date : 2000-05-29DOI: 10.1109/MELCON.2000.879677
A. Lazkano, J. Ruiz, L. Leturiondo, E. Aramendi
A new approach to a high impedance fault (HIF) detector is presented, suitable for the European scene where the power distribution systems are usually three-phase and three-wire configured. This paper aims to be a contribution to the proposals that, in the last twenty years, have been trying to solve the HIF problem with no definitive solution known yet. The purpose of the study presented is to design an electric arc detector and characterise the danger of the fault looking at fault context conditions. The detector system input signals are the three individual phase currents which comply with 3I/sub 0/=I/sub 1/+I/sub 2/+I/sub 3//spl ne/0 at the three-wire configuration. First, a continuous HIF context conditions study is proposed: overcurrent or reclosing in every phase, noticeable load variation monitoring and 3I/sub 0/ monitoring. Secondly, a short, medium and long-term statistical analysis is performed both with odd harmonics (third, fifth, seventh and ninth) and even harmonics (second and fourth) of the I/sub 0/ current. Thirdly, the estimated arc probability is calculated and combined with context conditions in order to determine a diagnosis. The proposed detector has been tested on 100 unfaulted condition event records (some have leakage current) and 32 staged fault records on different surfaces. The test results presented in the paper are satisfactory both in the sense of dependability and sensitivity.
{"title":"High impedance arcing fault detector for three-wire power distribution networks","authors":"A. Lazkano, J. Ruiz, L. Leturiondo, E. Aramendi","doi":"10.1109/MELCON.2000.879677","DOIUrl":"https://doi.org/10.1109/MELCON.2000.879677","url":null,"abstract":"A new approach to a high impedance fault (HIF) detector is presented, suitable for the European scene where the power distribution systems are usually three-phase and three-wire configured. This paper aims to be a contribution to the proposals that, in the last twenty years, have been trying to solve the HIF problem with no definitive solution known yet. The purpose of the study presented is to design an electric arc detector and characterise the danger of the fault looking at fault context conditions. The detector system input signals are the three individual phase currents which comply with 3I/sub 0/=I/sub 1/+I/sub 2/+I/sub 3//spl ne/0 at the three-wire configuration. First, a continuous HIF context conditions study is proposed: overcurrent or reclosing in every phase, noticeable load variation monitoring and 3I/sub 0/ monitoring. Secondly, a short, medium and long-term statistical analysis is performed both with odd harmonics (third, fifth, seventh and ninth) and even harmonics (second and fourth) of the I/sub 0/ current. Thirdly, the estimated arc probability is calculated and combined with context conditions in order to determine a diagnosis. The proposed detector has been tested on 100 unfaulted condition event records (some have leakage current) and 32 staged fault records on different surfaces. The test results presented in the paper are satisfactory both in the sense of dependability and sensitivity.","PeriodicalId":151424,"journal":{"name":"2000 10th Mediterranean Electrotechnical Conference. Information Technology and Electrotechnology for the Mediterranean Countries. Proceedings. MeleCon 2000 (Cat. No.00CH37099)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116767252","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}
Pub Date : 2000-05-29DOI: 10.1109/MELCON.2000.880404
S. Holgado, S. López-Buedo, A. Pearmain
One of the main problems in modern broadband networks is the variation of quality of service (QoS) that can occur. A very common technology used for broadband networks is ATM (asynchronous transfer mode). ATM can offer QoS guarantees for a number of different traffic classes. In an ATM switch it is possible to discard low-priority cells when the buffer is full. This can be done using logic implemented on a FPGA (field programmable gate array) chip, used because of its flexibility and easy re-configuration. This paper presents the FPGA implementation of an ATM cell priority classifier, which can be used in QoS management. The circuit directly receives a 155 Mbps ATM serial stream from a physical medium device, and performs cell delineation, serial to parallel conversion and classification according to the cell loss priority (CLP) bit. It has been implemented on a Xilinx Virtex XCV50PQ240-6 FPGA occupying 8252 equivalent gates. Simulation results show that the circuit can directly process a 155 Mbps ATM stream.
{"title":"FPGA implementation of an ATM traffic classifier for quality of service management","authors":"S. Holgado, S. López-Buedo, A. Pearmain","doi":"10.1109/MELCON.2000.880404","DOIUrl":"https://doi.org/10.1109/MELCON.2000.880404","url":null,"abstract":"One of the main problems in modern broadband networks is the variation of quality of service (QoS) that can occur. A very common technology used for broadband networks is ATM (asynchronous transfer mode). ATM can offer QoS guarantees for a number of different traffic classes. In an ATM switch it is possible to discard low-priority cells when the buffer is full. This can be done using logic implemented on a FPGA (field programmable gate array) chip, used because of its flexibility and easy re-configuration. This paper presents the FPGA implementation of an ATM cell priority classifier, which can be used in QoS management. The circuit directly receives a 155 Mbps ATM serial stream from a physical medium device, and performs cell delineation, serial to parallel conversion and classification according to the cell loss priority (CLP) bit. It has been implemented on a Xilinx Virtex XCV50PQ240-6 FPGA occupying 8252 equivalent gates. Simulation results show that the circuit can directly process a 155 Mbps ATM stream.","PeriodicalId":151424,"journal":{"name":"2000 10th Mediterranean Electrotechnical Conference. Information Technology and Electrotechnology for the Mediterranean Countries. Proceedings. MeleCon 2000 (Cat. No.00CH37099)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116719046","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}
2000 10th Mediterranean Electrotechnical Conference. Information Technology and Electrotechnology for the Mediterranean Countries. Proceedings. MeleCon 2000 (Cat. No.00CH37099)
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：