The authors present the staggered multicast protocol with collision-free acknowledgement, which is suitable for unicasting and broadcasting as well as multicasting in multihop spread spectrum packet radio networks. The common-header/transmitter-based spreading code is used for data packet transmission and the receiver-based code is used for acknowledgement packet transmission. By staggering packet transmission the protocol can significantly reduce broadcasting delay. A special addressing method and packet format are also proposed to achieve collision-free acknowledgement and multicast capability. The simulation result shows that the protocol provides better throughput-delay performance than the common-header/transmitter-based slotted ALOHA protocol.<>
{"title":"Staggered multicast protocol with collision-free acknowledgement in multihop spread spectrum packet radio networks","authors":"Kang-Wei Hung, T. Yum","doi":"10.1109/ICC.1992.268123","DOIUrl":"https://doi.org/10.1109/ICC.1992.268123","url":null,"abstract":"The authors present the staggered multicast protocol with collision-free acknowledgement, which is suitable for unicasting and broadcasting as well as multicasting in multihop spread spectrum packet radio networks. The common-header/transmitter-based spreading code is used for data packet transmission and the receiver-based code is used for acknowledgement packet transmission. By staggering packet transmission the protocol can significantly reduce broadcasting delay. A special addressing method and packet format are also proposed to achieve collision-free acknowledgement and multicast capability. The simulation result shows that the protocol provides better throughput-delay performance than the common-header/transmitter-based slotted ALOHA protocol.<<ETX>>","PeriodicalId":170618,"journal":{"name":"[Conference Record] SUPERCOMM/ICC '92 Discovering a New World of Communications","volume":"349 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115894742","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}
The author provides a methodology to determine the system reliability of any candidate dense wavelength division multiplexed (WDM) network architecture and uses it as a basis to perform cost versus reliability comparisons among the architectures. Results indicate that the subcarrier multiplexed/WDM architecture is the most promising architecture for implementation. Three dedicated 1:1 optical diversity path protection and equipment protection schemes using mechanical optical switches are proposed for survivable operation. The improvement in system reliability and the implementation cost are determined. The proposed protection schemes are not unique to the candidate architecture chosen and could be used for any other architecture, with a few modifications.<>
{"title":"Reliability evaluation and protection schemes for dense WDM network architectures","authors":"V. Bhagavath, H. Sobol","doi":"10.1109/ICC.1992.268267","DOIUrl":"https://doi.org/10.1109/ICC.1992.268267","url":null,"abstract":"The author provides a methodology to determine the system reliability of any candidate dense wavelength division multiplexed (WDM) network architecture and uses it as a basis to perform cost versus reliability comparisons among the architectures. Results indicate that the subcarrier multiplexed/WDM architecture is the most promising architecture for implementation. Three dedicated 1:1 optical diversity path protection and equipment protection schemes using mechanical optical switches are proposed for survivable operation. The improvement in system reliability and the implementation cost are determined. The proposed protection schemes are not unique to the candidate architecture chosen and could be used for any other architecture, with a few modifications.<<ETX>>","PeriodicalId":170618,"journal":{"name":"[Conference Record] SUPERCOMM/ICC '92 Discovering a New World of Communications","volume":"6 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132455361","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}
A direct sequence code division multiple access (DS-CDMA) system operating over a Rayleigh fading channel and sharing a common spectrum with various narrowband waveforms is discussed. Because of the presence of these narrowband waveforms, a suppression filter at a receiver is employed to reduce the interference. The average bit error rate (BER) performance is evaluated, and how the performance is influenced by various parameters, such as the number of taps of the suppression filter, the number of multiple-access users, the ratio of the narrowband interference bandwidth to the spread spectrum bandwidth, the interference power-to-signal power ratio, and the ratio of the offset of the interference carrier frequency from the spread spectrum carrier frequency to the half spread spectrum signal bandwidth, is investigated.<>
{"title":"Applications of suppression filters for CDMA overlay situations","authors":"J. Wang, L. Milstein","doi":"10.1109/ICC.1992.268254","DOIUrl":"https://doi.org/10.1109/ICC.1992.268254","url":null,"abstract":"A direct sequence code division multiple access (DS-CDMA) system operating over a Rayleigh fading channel and sharing a common spectrum with various narrowband waveforms is discussed. Because of the presence of these narrowband waveforms, a suppression filter at a receiver is employed to reduce the interference. The average bit error rate (BER) performance is evaluated, and how the performance is influenced by various parameters, such as the number of taps of the suppression filter, the number of multiple-access users, the ratio of the narrowband interference bandwidth to the spread spectrum bandwidth, the interference power-to-signal power ratio, and the ratio of the offset of the interference carrier frequency from the spread spectrum carrier frequency to the half spread spectrum signal bandwidth, is investigated.<<ETX>>","PeriodicalId":170618,"journal":{"name":"[Conference Record] SUPERCOMM/ICC '92 Discovering a New World of Communications","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130292409","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}
The effect of message-class dependent threshold-type scheduling on the queueing delay and resequencing delay for the M/M/n queueing system is analyzed. The authors derive the expressions for the mean queueing delay and resequencing delay for the M/M/n queueing system shared by C different message classes. A numerical calculation is carried out for the queueing system with two servers. It is found the message-class dependent threshold-type scheduling is effective in reducing the resequencing delay of some specific message class, and, thus, the proposed scheduling can satisfy the different requirements of the different message classes.<>
{"title":"The effect of message-class dependent threshold-type scheduling on the delay for the M/M/n queue","authors":"I. Sasase, Y. Nishio, H. Nakamura","doi":"10.1109/ICC.1992.268079","DOIUrl":"https://doi.org/10.1109/ICC.1992.268079","url":null,"abstract":"The effect of message-class dependent threshold-type scheduling on the queueing delay and resequencing delay for the M/M/n queueing system is analyzed. The authors derive the expressions for the mean queueing delay and resequencing delay for the M/M/n queueing system shared by C different message classes. A numerical calculation is carried out for the queueing system with two servers. It is found the message-class dependent threshold-type scheduling is effective in reducing the resequencing delay of some specific message class, and, thus, the proposed scheduling can satisfy the different requirements of the different message classes.<<ETX>>","PeriodicalId":170618,"journal":{"name":"[Conference Record] SUPERCOMM/ICC '92 Discovering a New World of Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130438018","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}
An expression is derived for outage probabilities in a microcellular radio system in which the desired radio signal is Rayleigh faded while an interfering signal is Rician faded. At low average signal-to-interference ratio (SIR) this Rayleigh/Rician fading environment is shown to exhibit a higher outage probability than that expected in cellular systems in which both desired and interfering signals are Rayleigh faded. However, at high average SIR the performance predicted by either model is the same.<>
{"title":"Outage probability of microcellular radio systems in a Rayleigh/Rician fading environment","authors":"J. Haug, D. Ucci","doi":"10.1109/ICC.1992.268243","DOIUrl":"https://doi.org/10.1109/ICC.1992.268243","url":null,"abstract":"An expression is derived for outage probabilities in a microcellular radio system in which the desired radio signal is Rayleigh faded while an interfering signal is Rician faded. At low average signal-to-interference ratio (SIR) this Rayleigh/Rician fading environment is shown to exhibit a higher outage probability than that expected in cellular systems in which both desired and interfering signals are Rayleigh faded. However, at high average SIR the performance predicted by either model is the same.<<ETX>>","PeriodicalId":170618,"journal":{"name":"[Conference Record] SUPERCOMM/ICC '92 Discovering a New World of Communications","volume":"140 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134193986","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}
A method based on a higher Petri net is introduced for implementing highspeed protocols. It provides a very efficient implementation on a multiple processor system as well as formal methods for analyzing and improving the software. A formal protocol specification technique has been modified and is presented. It leads to a simple extension of conventional sequential programming languages and two new methods of optimizing the granularity of the parallel program.<>
{"title":"Concurrent execution of communication protocols in high speed networks","authors":"M. Rupprecht, C. Engel","doi":"10.1109/ICC.1992.268269","DOIUrl":"https://doi.org/10.1109/ICC.1992.268269","url":null,"abstract":"A method based on a higher Petri net is introduced for implementing highspeed protocols. It provides a very efficient implementation on a multiple processor system as well as formal methods for analyzing and improving the software. A formal protocol specification technique has been modified and is presented. It leads to a simple extension of conventional sequential programming languages and two new methods of optimizing the granularity of the parallel program.<<ETX>>","PeriodicalId":170618,"journal":{"name":"[Conference Record] SUPERCOMM/ICC '92 Discovering a New World of Communications","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134050674","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}
Several different methods are available for computing the power spectral density (PSD) of a general continuous phase modulated (CPM) signal. For the case of rectangular frequency pulses with L=1 (that is, M-ary continuous phase frequency shift keying (CPFSK) or M-ary 1REC CPM), an analytical expression is known for the PSD when the data symbols are equally likely. An analytic expression is obtained for the PSD of an M-ary LREC CPM signal where L is an arbitrary positive integer and the data symbols are not necessarily equally likely. The technique employed does not require the tedious evaluation of integrals. Rather, the integrals are recognized as convolutions and the PSD is obtained using simple Fourier transform properties. Some numerical results and computational aspects of the method are discussed.<>
{"title":"An analytical expression for power spectra of M-ary LREC continuous phase modulation signals","authors":"R.A. Korkosz, Dilip V. Sarwate","doi":"10.1109/ICC.1992.268205","DOIUrl":"https://doi.org/10.1109/ICC.1992.268205","url":null,"abstract":"Several different methods are available for computing the power spectral density (PSD) of a general continuous phase modulated (CPM) signal. For the case of rectangular frequency pulses with L=1 (that is, M-ary continuous phase frequency shift keying (CPFSK) or M-ary 1REC CPM), an analytical expression is known for the PSD when the data symbols are equally likely. An analytic expression is obtained for the PSD of an M-ary LREC CPM signal where L is an arbitrary positive integer and the data symbols are not necessarily equally likely. The technique employed does not require the tedious evaluation of integrals. Rather, the integrals are recognized as convolutions and the PSD is obtained using simple Fourier transform properties. Some numerical results and computational aspects of the method are discussed.<<ETX>>","PeriodicalId":170618,"journal":{"name":"[Conference Record] SUPERCOMM/ICC '92 Discovering a New World of Communications","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132606401","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}
The authors present an approach for analyzing the performance of banyan-network-based asynchronous transfer mode (ATM) switches built with switching modules (SMs) that can be of arbitrary sizes and contain buffers of arbitrary sizes at each output. This approach is based on a refined model that takes the blocking interdependence between SM stages into account by the introduction of the virtual queue. A comparison with simulation data indicates that the results obtained by this approach are fairly accurate for the whole range of offered load.<>
{"title":"Performance analysis of banyan network based ATM switches","authors":"Yanhe Fan, Jianli Wang, Chuan Wang","doi":"10.1109/ICC.1992.268020","DOIUrl":"https://doi.org/10.1109/ICC.1992.268020","url":null,"abstract":"The authors present an approach for analyzing the performance of banyan-network-based asynchronous transfer mode (ATM) switches built with switching modules (SMs) that can be of arbitrary sizes and contain buffers of arbitrary sizes at each output. This approach is based on a refined model that takes the blocking interdependence between SM stages into account by the introduction of the virtual queue. A comparison with simulation data indicates that the results obtained by this approach are fairly accurate for the whole range of offered load.<<ETX>>","PeriodicalId":170618,"journal":{"name":"[Conference Record] SUPERCOMM/ICC '92 Discovering a New World of Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130757513","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}
The relation between Centrex service and integrated services digital network (ISDN) technology is discussed. The advantages and the synergies arising in the introduction of Centrex in ISDN are described, with particular emphasis on the access/network signaling and on the offered services aspects. In addition, two different ways of providing ISDN users with Centrex services and relevant ISDN-based central office local area network (CO-LAN) issues are analyzed.<>
{"title":"Centrex services and CO-LAN in an ISDN environment","authors":"C. Gilardi, E. Garetti, R. Munno","doi":"10.1109/ICC.1992.267972","DOIUrl":"https://doi.org/10.1109/ICC.1992.267972","url":null,"abstract":"The relation between Centrex service and integrated services digital network (ISDN) technology is discussed. The advantages and the synergies arising in the introduction of Centrex in ISDN are described, with particular emphasis on the access/network signaling and on the offered services aspects. In addition, two different ways of providing ISDN users with Centrex services and relevant ISDN-based central office local area network (CO-LAN) issues are analyzed.<<ETX>>","PeriodicalId":170618,"journal":{"name":"[Conference Record] SUPERCOMM/ICC '92 Discovering a New World of Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130814791","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}
The authors propose an integrated satellite digital video system for business video communications which realizes multipoint to multipoint dynamic channel assignment, simultaneous plural video signal transmission, and efficient use of the transponder transmission power. An offset quadrature phase shift keying (QPSK) modulation scheme with a high-coding-gain high-coding-rate forward error correction scheme obtains compact spectrum characteristics and highly interference-resistant characteristics in nonlinear satellite channels. For backward voice channel transmission from video signal receive-only terminals, a superposed spread spectrum multiple access voice signal transmission scheme over a time division multiple access video signal through one transponder that employs a cochannel interference cancellation technique is proposed.<>
{"title":"Novel satellite digital video TDMA system for business video communications","authors":"S. Kato, S. Kubota, H. Kazama, M. Morikura","doi":"10.1109/ICC.1992.268022","DOIUrl":"https://doi.org/10.1109/ICC.1992.268022","url":null,"abstract":"The authors propose an integrated satellite digital video system for business video communications which realizes multipoint to multipoint dynamic channel assignment, simultaneous plural video signal transmission, and efficient use of the transponder transmission power. An offset quadrature phase shift keying (QPSK) modulation scheme with a high-coding-gain high-coding-rate forward error correction scheme obtains compact spectrum characteristics and highly interference-resistant characteristics in nonlinear satellite channels. For backward voice channel transmission from video signal receive-only terminals, a superposed spread spectrum multiple access voice signal transmission scheme over a time division multiple access video signal through one transponder that employs a cochannel interference cancellation technique is proposed.<<ETX>>","PeriodicalId":170618,"journal":{"name":"[Conference Record] SUPERCOMM/ICC '92 Discovering a New World of Communications","volume":"134 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130980660","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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