Pub Date : 2002-08-07DOI: 10.1109/IZSBC.2002.991755
M. Singh
We propose techniques for incorporating QoS mechanisms into routing path computation and path selection algorithms for use in the the next generation Internet. We believe that using such techniques will help to provide a complete solution to the QoS problem. The problem of QoS routing is essentially one of finding a optimal path which will satisfy one or more constraints such as bandwidth, delay, jitter delay and minimize some cost function. This problem belongs to the class of problems known as multiobjective constrained path optimization which are known to be NP-hard. Several approximate solutions have been suggested for this problem, one of them being Orda's (see IEEE/ACM Transactions on Networking, vol.7, no.3, p.365-74, 1999). We build on some of the suggested schemes therein and apply them to a Cos network. We propose techniques which will compute a set of feasible paths which satisfy the bandwidth constraints of a path set-up request or a service level agreement (SLA). We then choose a path from amongst the feasible paths such that we have good utilization of available bandwidth and balance the load in the network. These techniques are Cos aware and adaptive, they respond to congestion in the network by routing higher classes of traffic away from congested links and nodes. The techniques are shown to be computationally tractable.
{"title":"Efficient techniques for QoS based path computation and selection in differentiated service networks","authors":"M. Singh","doi":"10.1109/IZSBC.2002.991755","DOIUrl":"https://doi.org/10.1109/IZSBC.2002.991755","url":null,"abstract":"We propose techniques for incorporating QoS mechanisms into routing path computation and path selection algorithms for use in the the next generation Internet. We believe that using such techniques will help to provide a complete solution to the QoS problem. The problem of QoS routing is essentially one of finding a optimal path which will satisfy one or more constraints such as bandwidth, delay, jitter delay and minimize some cost function. This problem belongs to the class of problems known as multiobjective constrained path optimization which are known to be NP-hard. Several approximate solutions have been suggested for this problem, one of them being Orda's (see IEEE/ACM Transactions on Networking, vol.7, no.3, p.365-74, 1999). We build on some of the suggested schemes therein and apply them to a Cos network. We propose techniques which will compute a set of feasible paths which satisfy the bandwidth constraints of a path set-up request or a service level agreement (SLA). We then choose a path from amongst the feasible paths such that we have good utilization of available bandwidth and balance the load in the network. These techniques are Cos aware and adaptive, they respond to congestion in the network by routing higher classes of traffic away from congested links and nodes. The techniques are shown to be computationally tractable.","PeriodicalId":336991,"journal":{"name":"2002 International Zurich Seminar on Broadband Communications Access - Transmission - Networking (Cat. No.02TH8599)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116753652","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 : 2002-08-07DOI: 10.1109/IZSBC.2002.991762
W. Henkel, G. Taubock, Per Ödling, P. Börjesson, N. Petersson
We address the impact of a too short cyclic prefix on multicarrier systems such as orthogonal frequency division multiplexing (OFDM) and discrete multitone (DMT). The main result is that the intersymbol interference (ISI) and intercarrier interference (ICI) may be spectrally concentrated and analytical expressions showing this are given. A practical implication is, e.g., that the cyclic prefix in some xDSL systems can be surprisingly short, as shown in one example of ADSL transmission.
{"title":"The cyclic prefix of OFDM/DMT - an analysis","authors":"W. Henkel, G. Taubock, Per Ödling, P. Börjesson, N. Petersson","doi":"10.1109/IZSBC.2002.991762","DOIUrl":"https://doi.org/10.1109/IZSBC.2002.991762","url":null,"abstract":"We address the impact of a too short cyclic prefix on multicarrier systems such as orthogonal frequency division multiplexing (OFDM) and discrete multitone (DMT). The main result is that the intersymbol interference (ISI) and intercarrier interference (ICI) may be spectrally concentrated and analytical expressions showing this are given. A practical implication is, e.g., that the cyclic prefix in some xDSL systems can be surprisingly short, as shown in one example of ADSL transmission.","PeriodicalId":336991,"journal":{"name":"2002 International Zurich Seminar on Broadband Communications Access - Transmission - Networking (Cat. No.02TH8599)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130643299","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 : 2002-08-07DOI: 10.1109/IZSBC.2002.991754
S. Norden, M. Waldvogel
Typically, multicast data distribution uses rendezvous points (PIM, CBT), multicast distribution tree building protocols, and multicast forwarding. Whereas the first two approaches have been extensively studied, scaling multicast forwarding state without increasing forwarding complexity has not been addressed in detail. Having a scalable strategy for aggregation of multicast forwarding state is essential for inter-domain multicast which could have any number of concurrent multicast groups, especially in applications such as event notification and web cache invalidation mechanisms. We first present the essential characteristics of a scalable multicast routing mechanism. We then introduce and analyze, according to these metrics, a scalable aggregation mechanism for multicast-based update and change distribution based on imprecise (too generous) aggregation. Our mechanism is simple to implement, requires no additional information about the groups, and allows important savings in routing table size and routing protocol overhead, at a minimal expense in additional network and end-system traffic.
{"title":"Imprecise multicast routing for scalable information distribution","authors":"S. Norden, M. Waldvogel","doi":"10.1109/IZSBC.2002.991754","DOIUrl":"https://doi.org/10.1109/IZSBC.2002.991754","url":null,"abstract":"Typically, multicast data distribution uses rendezvous points (PIM, CBT), multicast distribution tree building protocols, and multicast forwarding. Whereas the first two approaches have been extensively studied, scaling multicast forwarding state without increasing forwarding complexity has not been addressed in detail. Having a scalable strategy for aggregation of multicast forwarding state is essential for inter-domain multicast which could have any number of concurrent multicast groups, especially in applications such as event notification and web cache invalidation mechanisms. We first present the essential characteristics of a scalable multicast routing mechanism. We then introduce and analyze, according to these metrics, a scalable aggregation mechanism for multicast-based update and change distribution based on imprecise (too generous) aggregation. Our mechanism is simple to implement, requires no additional information about the groups, and allows important savings in routing table size and routing protocol overhead, at a minimal expense in additional network and end-system traffic.","PeriodicalId":336991,"journal":{"name":"2002 International Zurich Seminar on Broadband Communications Access - Transmission - Networking (Cat. No.02TH8599)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132876434","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 : 2002-08-07DOI: 10.1109/IZSBC.2002.991799
M. Hannikainen, I. Lehtoranta, M. Kuorilehto, J. Suhonen, M. Niemi, T. Hamalainen
This paper presents the architecture of a wireless video transfer demonstrator. The demonstrator has been implemented for developing control protocols and QoS support for real-time video streaming services. The demonstrator contains modules for video capture, encoding, stream protection and transfer for wireless link or network, as well as for decoding and displaying at the receiver. H.263 encoding is performed in real-time using dedicated hardware. A video control protocol has been designed and implemented for managing the stream transfer and for collecting measurement information. The current implementation operates over wireless LAN, GSM data, Bluetooth and a proprietary wireless LAN called TUTWLAN. In addition, a special module has been implemented for simulating different wireless links or networks locally.
{"title":"Architecture of a wireless video transfer demonstrator","authors":"M. Hannikainen, I. Lehtoranta, M. Kuorilehto, J. Suhonen, M. Niemi, T. Hamalainen","doi":"10.1109/IZSBC.2002.991799","DOIUrl":"https://doi.org/10.1109/IZSBC.2002.991799","url":null,"abstract":"This paper presents the architecture of a wireless video transfer demonstrator. The demonstrator has been implemented for developing control protocols and QoS support for real-time video streaming services. The demonstrator contains modules for video capture, encoding, stream protection and transfer for wireless link or network, as well as for decoding and displaying at the receiver. H.263 encoding is performed in real-time using dedicated hardware. A video control protocol has been designed and implemented for managing the stream transfer and for collecting measurement information. The current implementation operates over wireless LAN, GSM data, Bluetooth and a proprietary wireless LAN called TUTWLAN. In addition, a special module has been implemented for simulating different wireless links or networks locally.","PeriodicalId":336991,"journal":{"name":"2002 International Zurich Seminar on Broadband Communications Access - Transmission - Networking (Cat. No.02TH8599)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133230856","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 : 2002-08-07DOI: 10.1109/IZSBC.2002.991779
Y. Bian, A. Nix, J. McGeehan
In a practical DS-CDMA (direct sequence code division multiple access) system, the desired user suffers from significant multiple access interference (MAI) resulting from the presence of other users in a time varying multipath channel. This problem is particularity limiting on the uplink (UL), where time asynchronous users transmit over independent fading channels. This paper presents a novel receiver architecture that is reconfigurable to optimize performance adaptively in a multiuser scenario under time varying frequency selective fading channels plus additive white Gaussian noise (AWGN). the UMTS TDD (time division duplex) CDMA UL format is considered. System performance in terms of uncoded BER (bit error rate) and overall capacity are presented. The results demonstrate that the proposed architecture can greatly reduce the interference floor at the base station (BS) and thus significantly improve the performance and capacity.
{"title":"Base station 2-dimensional reconfigurable receiver architecture for DS-CDMA","authors":"Y. Bian, A. Nix, J. McGeehan","doi":"10.1109/IZSBC.2002.991779","DOIUrl":"https://doi.org/10.1109/IZSBC.2002.991779","url":null,"abstract":"In a practical DS-CDMA (direct sequence code division multiple access) system, the desired user suffers from significant multiple access interference (MAI) resulting from the presence of other users in a time varying multipath channel. This problem is particularity limiting on the uplink (UL), where time asynchronous users transmit over independent fading channels. This paper presents a novel receiver architecture that is reconfigurable to optimize performance adaptively in a multiuser scenario under time varying frequency selective fading channels plus additive white Gaussian noise (AWGN). the UMTS TDD (time division duplex) CDMA UL format is considered. System performance in terms of uncoded BER (bit error rate) and overall capacity are presented. The results demonstrate that the proposed architecture can greatly reduce the interference floor at the base station (BS) and thus significantly improve the performance and capacity.","PeriodicalId":336991,"journal":{"name":"2002 International Zurich Seminar on Broadband Communications Access - Transmission - Networking (Cat. No.02TH8599)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134249604","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 : 2002-08-07DOI: 10.1109/IZSBC.2002.991777
C. Fischer, D. Slock
We investigate the application of multiple stage filters in the context of pathwise processing. Pathwise processing proposes to overcome one of the major difficulties encountered with linear DS-CDMA receivers in time-varying multipath propagation, namely the estimation of a large number of parameters from scarce training data. Pathwise interference estimation allows the separation of the parameters into rapidly and slowly varying parameters, thereby allowing the scarce training data to be used in the estimation of the rapidly varying parameters with a short time constant while the slowly varying parameters can be estimated over a much larger time interval. This paper focuses on the application of polynomial expansion (PE) filters to pathwise processing and proposes the use of a weighting factor per signal component. We show that these weighting coefficients not only achieve significant improvements in the presence of power imbalances between users and paths w.r.t. scalar weighting, but also achieve further improvement due to the better estimation of the rapidly varying parameters.
{"title":"Multistage DS-CDMA receivers with pathwise interference mitigation","authors":"C. Fischer, D. Slock","doi":"10.1109/IZSBC.2002.991777","DOIUrl":"https://doi.org/10.1109/IZSBC.2002.991777","url":null,"abstract":"We investigate the application of multiple stage filters in the context of pathwise processing. Pathwise processing proposes to overcome one of the major difficulties encountered with linear DS-CDMA receivers in time-varying multipath propagation, namely the estimation of a large number of parameters from scarce training data. Pathwise interference estimation allows the separation of the parameters into rapidly and slowly varying parameters, thereby allowing the scarce training data to be used in the estimation of the rapidly varying parameters with a short time constant while the slowly varying parameters can be estimated over a much larger time interval. This paper focuses on the application of polynomial expansion (PE) filters to pathwise processing and proposes the use of a weighting factor per signal component. We show that these weighting coefficients not only achieve significant improvements in the presence of power imbalances between users and paths w.r.t. scalar weighting, but also achieve further improvement due to the better estimation of the rapidly varying parameters.","PeriodicalId":336991,"journal":{"name":"2002 International Zurich Seminar on Broadband Communications Access - Transmission - Networking (Cat. No.02TH8599)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114197555","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 : 2002-08-07DOI: 10.1109/IZSBC.2002.991765
M. Gotz, K. Dostert
The design and testing of high speed powerline communication systems requires an efficient channel emulation environment fulfilling real-time constraints. Typical powerline channel distortions and disturbances must be covered. The development of a system to perform these tasks is presented.
{"title":"A universal high speed powerline channel emulation system","authors":"M. Gotz, K. Dostert","doi":"10.1109/IZSBC.2002.991765","DOIUrl":"https://doi.org/10.1109/IZSBC.2002.991765","url":null,"abstract":"The design and testing of high speed powerline communication systems requires an efficient channel emulation environment fulfilling real-time constraints. Typical powerline channel distortions and disturbances must be covered. The development of a system to perform these tasks is presented.","PeriodicalId":336991,"journal":{"name":"2002 International Zurich Seminar on Broadband Communications Access - Transmission - Networking (Cat. No.02TH8599)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121263977","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 : 2002-08-07DOI: 10.1109/IZSBC.2002.991788
H. Mathis
Vestigial sideband modulation is the modulation scheme of choice for the American standard for high-definition television (HDTV). The symbol-error rate of this modulation formal is highly dependent on the carrier phase estimation. Although a PLL tracks both carrier frequency as well as carrier phase in such a system, the residual phase noise needs further suppression. Phase synchronizers can either work in a data-aided manner or blindly. We focus on the latter and show the relationship between phase synchronization and blind source separation (BSS). A method suitable for the phase synchronization of VSB signals is presented and evaluated. Its performance is measured against that of the decision-directed approaches that have been suggested in the literature. Depending on the SNR of the VSB signal, either the blind or decision-directed approach exhibit superior performance. A semi-blind method, which combines the advantages of the decision-directed and the blind mode in their respective SNR regions, is introduced and set in perspective with the other algorithms.
{"title":"Blind carrier phase synchronization for HDTV","authors":"H. Mathis","doi":"10.1109/IZSBC.2002.991788","DOIUrl":"https://doi.org/10.1109/IZSBC.2002.991788","url":null,"abstract":"Vestigial sideband modulation is the modulation scheme of choice for the American standard for high-definition television (HDTV). The symbol-error rate of this modulation formal is highly dependent on the carrier phase estimation. Although a PLL tracks both carrier frequency as well as carrier phase in such a system, the residual phase noise needs further suppression. Phase synchronizers can either work in a data-aided manner or blindly. We focus on the latter and show the relationship between phase synchronization and blind source separation (BSS). A method suitable for the phase synchronization of VSB signals is presented and evaluated. Its performance is measured against that of the decision-directed approaches that have been suggested in the literature. Depending on the SNR of the VSB signal, either the blind or decision-directed approach exhibit superior performance. A semi-blind method, which combines the advantages of the decision-directed and the blind mode in their respective SNR regions, is introduced and set in perspective with the other algorithms.","PeriodicalId":336991,"journal":{"name":"2002 International Zurich Seminar on Broadband Communications Access - Transmission - Networking (Cat. No.02TH8599)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130015069","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 : 2002-08-07DOI: 10.1109/IZSBC.2002.991792
M. Kirsch, F. Berens
In cellular mobile radio systems, determination of the speed of the mobile is of an essential importance for the optimization of receiver algorithms. This paper describes a method for estimating the speed of a mobile wireless terminal using the normalized autocovariance of the power of the received signal. The presented algorithm can be deployed in both the mobile terminal and the base station. Existing methods based on autocorrelations only make the distinction between slow and fast mobiles. Furthermore, they are sensitive to the number of channel taps. By using the normalized autocovariance function the speed estimation can achieve much better results in a broad range of mobile radio environments. We show how to derive the speed information from the normalized autocovariance of the power of the received signal assuming a multipath Rayleigh fading channel model. We evaluate the performance of the proposed speed estimation method in different channel configurations through simulation results in the particular case of a WCDMA-FDD system.
{"title":"Mobile speed estimation for 3G mobile radio systems using the normalized autocovariance function","authors":"M. Kirsch, F. Berens","doi":"10.1109/IZSBC.2002.991792","DOIUrl":"https://doi.org/10.1109/IZSBC.2002.991792","url":null,"abstract":"In cellular mobile radio systems, determination of the speed of the mobile is of an essential importance for the optimization of receiver algorithms. This paper describes a method for estimating the speed of a mobile wireless terminal using the normalized autocovariance of the power of the received signal. The presented algorithm can be deployed in both the mobile terminal and the base station. Existing methods based on autocorrelations only make the distinction between slow and fast mobiles. Furthermore, they are sensitive to the number of channel taps. By using the normalized autocovariance function the speed estimation can achieve much better results in a broad range of mobile radio environments. We show how to derive the speed information from the normalized autocovariance of the power of the received signal assuming a multipath Rayleigh fading channel model. We evaluate the performance of the proposed speed estimation method in different channel configurations through simulation results in the particular case of a WCDMA-FDD system.","PeriodicalId":336991,"journal":{"name":"2002 International Zurich Seminar on Broadband Communications Access - Transmission - Networking (Cat. No.02TH8599)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116922595","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 : 2002-08-07DOI: 10.1109/IZSBC.2002.991769
O. Ertug, Berna Sayraq Gnal, B. Baykal
We analyze the spectral efficiency - sum-rates capacity per temporal degrees of freedom - and error-exponents of the uplink of randomly-spread CDMA systems with diversity-combining linear multiuser receivers over time-varying frequency-selective multipath Rayleigh fading channels. Assuming equal-rate/equal-energy identical users and statistically identical channels for each user, the analysis of the closed-form spectral efficiency and the corresponding sum-rates error-exponent expressions in terms of the key system parameters for both the correlated-waveform vector multi-access channel model with optimum joint-ML multiuser decoding as well as with the linear RAKE, decorrelating and MMSE multiuser receivers followed by suboptimal single-user ML decoding sheds light on to asymptotic system behaviour of large-dimensional channel-coded CDMA systems with linear multiuser receivers over multipath Rayleigh fading channels.
{"title":"Spectral efficiency and error-exponents of randomly-spread CDMA with linear multiuser receivers over multipath Rayleigh fading channels","authors":"O. Ertug, Berna Sayraq Gnal, B. Baykal","doi":"10.1109/IZSBC.2002.991769","DOIUrl":"https://doi.org/10.1109/IZSBC.2002.991769","url":null,"abstract":"We analyze the spectral efficiency - sum-rates capacity per temporal degrees of freedom - and error-exponents of the uplink of randomly-spread CDMA systems with diversity-combining linear multiuser receivers over time-varying frequency-selective multipath Rayleigh fading channels. Assuming equal-rate/equal-energy identical users and statistically identical channels for each user, the analysis of the closed-form spectral efficiency and the corresponding sum-rates error-exponent expressions in terms of the key system parameters for both the correlated-waveform vector multi-access channel model with optimum joint-ML multiuser decoding as well as with the linear RAKE, decorrelating and MMSE multiuser receivers followed by suboptimal single-user ML decoding sheds light on to asymptotic system behaviour of large-dimensional channel-coded CDMA systems with linear multiuser receivers over multipath Rayleigh fading channels.","PeriodicalId":336991,"journal":{"name":"2002 International Zurich Seminar on Broadband Communications Access - Transmission - Networking (Cat. No.02TH8599)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133275787","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}
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