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The double-slot slotted ring protocol (DSR) 双槽槽环协议(DSR)
SBT/IEEE International Symposium on Telecommunications Pub Date : 1990-09-03 DOI: 10.1109/ITS.1990.175605
D. Greaves
{"title":"The double-slot slotted ring protocol (DSR)","authors":"D. Greaves","doi":"10.1109/ITS.1990.175605","DOIUrl":"https://doi.org/10.1109/ITS.1990.175605","url":null,"abstract":"The DSR protocol combines a multilevel priority and fairness guarantee mechanism over a destination-release slotted ring. The fairness mechanism ensures fair bandwidth division within each priority level and operates through a distributed reservations algorithm entirely within the media-access control layer. In common with other destination-release slotted rings, the DSR protocol can offer network bandwidth which exceeds the channel bandwidth. However, unlike some quota-based load-balancing mechanisms, the DSR priority mechanism is effective, even when supporting bursty sources at high priority. There is no rule restricting one transmission per ring revolution. Therefore the protocol efficiency is virtually independent of the number of slots and the ring latency. The DSR protocol is therefore not only for LAN (local area network) applications, but for multimedia, metropolitan area applications, supporting in excess of 100 km of fiber and line rates in the gigahertz region.<<ETX>>","PeriodicalId":405932,"journal":{"name":"SBT/IEEE International Symposium on Telecommunications","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127818338","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
Queuing analysis of a shared buffer strategy for transport-layer connections 传输层连接共享缓冲策略的排队分析
SBT/IEEE International Symposium on Telecommunications Pub Date : 1990-09-03 DOI: 10.1109/ITS.1990.175591
A. J. Vernon, J. Field, J. W. Wong
{"title":"Queuing analysis of a shared buffer strategy for transport-layer connections","authors":"A. J. Vernon, J. Field, J. W. Wong","doi":"10.1109/ITS.1990.175591","DOIUrl":"https://doi.org/10.1109/ITS.1990.175591","url":null,"abstract":"The performance of transport-layer connections with buffer sharing is investigated. The authors consider the scenario of multiple sender hosts and a single receiver host which are connected through a transport network. Application-layer processes in the sender hosts generate messages which are transferred to a peer process in the receiver host. Messages are transferred over window flow-controlled end-to-end connections between transport-layer entities. Buffer space in the host machines is assumed to be limited and thus process blocking can occur. It is assumed that the buffers are shared between the transport and higher layer entities. The performance model developed considers the system to be composed of two submodels: sender and receiver. The analysis technique used develops a queuing model for each submodel, and approximate results are obtained through an iterative solution method, using the results of one submodel as input to the other. This analysis is then applied to obtain performance characteristics for two example systems.<<ETX>>","PeriodicalId":405932,"journal":{"name":"SBT/IEEE International Symposium on Telecommunications","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117328489","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
PC workstation for Ethernet monitoring and management 用于以太网监控和管理的PC工作站
SBT/IEEE International Symposium on Telecommunications Pub Date : 1990-09-03 DOI: 10.1109/ITS.1990.175668
J. Pinto, J.L. Oliveira, J. Martins
{"title":"PC workstation for Ethernet monitoring and management","authors":"J. Pinto, J.L. Oliveira, J. Martins","doi":"10.1109/ITS.1990.175668","DOIUrl":"https://doi.org/10.1109/ITS.1990.175668","url":null,"abstract":"The authors present a monitoring and management workstation for IEEE 802.3 networks (Ethernet) based on a PC-AT. The monitor performs traffic analysis, detects active machines in the network, maintains a network database with information regarding network topology and machines, filters specific packets or protocols, and can also work as a traffic generator. The system has a user friendly interface simplifying the interaction with the network manager.<<ETX>>","PeriodicalId":405932,"journal":{"name":"SBT/IEEE International Symposium on Telecommunications","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125747969","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
A novel baud-length memory FSE 一种新颖的波特长度存储器FSE
SBT/IEEE International Symposium on Telecommunications Pub Date : 1990-09-03 DOI: 10.1109/ITS.1990.175615
M. Barton
{"title":"A novel baud-length memory FSE","authors":"M. Barton","doi":"10.1109/ITS.1990.175615","DOIUrl":"https://doi.org/10.1109/ITS.1990.175615","url":null,"abstract":"The author presents a novel fractionally spaced equalizer (FSE) that spans a single symbol period. It is derived from the parametric estimates of a time-invariant or slowly time-varying baseband equivalent channel. The parametric channel estimates are assumed to be obtainable from a training sequence prior to data acquisition. The performance of the FSE depends to a large extent on how well the channel parameters can be estimated, and on the input signal-to-noise ratio (SNR) during training.<<ETX>>","PeriodicalId":405932,"journal":{"name":"SBT/IEEE International Symposium on Telecommunications","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132491548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A terminal adaptor to explore variable-bit-rate services for multi-Gb/sec broadband networks 一种终端适配器，用于探索多gb /秒宽带网络的可变比特率服务
SBT/IEEE International Symposium on Telecommunications Pub Date : 1990-09-03 DOI: 10.1109/ITS.1990.175610
A. Albanese
{"title":"A terminal adaptor to explore variable-bit-rate services for multi-Gb/sec broadband networks","authors":"A. Albanese","doi":"10.1109/ITS.1990.175610","DOIUrl":"https://doi.org/10.1109/ITS.1990.175610","url":null,"abstract":"A prototype implementation of a terminal adaptor for broadband network applications is described. This experimental prototype is used to explore protocols, applications, and internetworking functions needed to support variable-bit-rate services across future broadband networks. Each service or network interface has a processor that communicates with other processors in asynchronous transfer mode (ATM) through an electrical backplane and through an optical backbone if needed to interconnect two distant processors. The internetworking of services is facilitated because all processors have a common ATM interface. The same hardware may be used initially as a multi-service node for a cell-based dual-bus MAN (metropolitan area network) and later as an ATM terminal adaptor for the broadband integrated services digital network. The transport, management, and control protocols are outlined.<<ETX>>","PeriodicalId":405932,"journal":{"name":"SBT/IEEE International Symposium on Telecommunications","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130444867","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: 1
Software tools SDL systems 软件工具SDL系统
SBT/IEEE International Symposium on Telecommunications Pub Date : 1990-09-03 DOI: 10.1109/ITS.1990.175623
M. Ramos, Johnny Cardoso Marques, N. D. Bretas
{"title":"Software tools SDL systems","authors":"M. Ramos, Johnny Cardoso Marques, N. D. Bretas","doi":"10.1109/ITS.1990.175623","DOIUrl":"https://doi.org/10.1109/ITS.1990.175623","url":null,"abstract":"The authors address the development of software tools to support the documentation, analysis, and implementation of specification and description language (SDL) systems. These tools consist of a graphical SDL editor and analyzer, a high-level programming language and its compiler, an operating system, and a debugger, all of which are currently being used in the development of small-capacity switching systems. The most important characteristics of these tools are presented along with the results obtained with their practical adoption. The authors also present plans for further development and an example.<<ETX>>","PeriodicalId":405932,"journal":{"name":"SBT/IEEE International Symposium on Telecommunications","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129217581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A 400 Mbps multimedia LAN 一个400mbps的多媒体局域网
SBT/IEEE International Symposium on Telecommunications Pub Date : 1990-09-03 DOI: 10.1109/ITS.1990.175607
T. Matsuda, H. Fukuda, M. Hirome, K. Kobayashi, T. Minami
{"title":"A 400 Mbps multimedia LAN","authors":"T. Matsuda, H. Fukuda, M. Hirome, K. Kobayashi, T. Minami","doi":"10.1109/ITS.1990.175607","DOIUrl":"https://doi.org/10.1109/ITS.1990.175607","url":null,"abstract":"A 400 Mb/s multimedia LAN (local area network) with a slotted-ring architecture is described. This LAN provides communication network functions necessary for multimedia communication for offices, plants, and campuses. The LAN features integration of multiple media such as voice, data, image, and video; and interconnection of low- to medium-speed LANs. The authors also discuss the future of multimedia LANs based on optical techniques such as optical signal processing, optical amplification, and coherent optical transmission.<<ETX>>","PeriodicalId":405932,"journal":{"name":"SBT/IEEE International Symposium on Telecommunications","volume":"182 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121723816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A rigorous method for the calculation of loss in waveguiding structures 一种精确计算波导结构损耗的方法
SBT/IEEE International Symposium on Telecommunications Pub Date : 1990-09-03 DOI: 10.1109/ITS.1990.175572
A. Sapienza, H. Figueroa
{"title":"A rigorous method for the calculation of loss in waveguiding structures","authors":"A. Sapienza, H. Figueroa","doi":"10.1109/ITS.1990.175572","DOIUrl":"https://doi.org/10.1109/ITS.1990.175572","url":null,"abstract":"An algorithm is developed to analyze the dissipation of electromagnetic power in waveguide of arbitrary cross section, based on the finite-element method and the Galerkin principle. This procedure is applicable to inhomogeneous media characterized by their loss tangent and resistivity. The wave equation, which is complex due to the presence of dissipative media, is discretized into a complex matrix eigenvalue problem. This matrix system is solved by an iterative procedure with the aid of the Newton-Raphson method, reducing the complex matrices simultaneously, one to upper Hessenberg form and the other to upper triangular form. To verify the accuracy of this method the fundamental mode of propagation in a rectangular waveguide with conductive walls with a slab of dissipative material placed along the symmetry plane of waveguide is analyzed. An image line formed by a silicon rod with two different values for the loss tangent (5.0*10/sup -4/; 1.0*10/sup -3/) is also studied.<<ETX>>","PeriodicalId":405932,"journal":{"name":"SBT/IEEE International Symposium on Telecommunications","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124959714","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
An assessment of the performance of slant-path attenuation prediction methods in tropical and equatorial regions 热带和赤道地区倾斜路径衰减预测方法的性能评价
SBT/IEEE International Symposium on Telecommunications Pub Date : 1990-09-03 DOI: 10.1109/ITS.1990.175604
M. Pontes, C. Migliora, L. Mello
{"title":"An assessment of the performance of slant-path attenuation prediction methods in tropical and equatorial regions","authors":"M. Pontes, C. Migliora, L. Mello","doi":"10.1109/ITS.1990.175604","DOIUrl":"https://doi.org/10.1109/ITS.1990.175604","url":null,"abstract":"As the demands for larger capacity and new satellite services increase, so does the importance of the problem of slant-path attenuation prediction at frequencies above 10 GHz. The authors present a comparison between the attenuation predicted by nine of the currently available methods, using point rainfall data measured at four Brazilian locations, and the attenuations actually obtained from concurrently performed radiometric measurements. These results constitute a first step towards the improvement of slant-path attenuation predictions above 10 GHz in tropical and equatorial regions.<<ETX>>","PeriodicalId":405932,"journal":{"name":"SBT/IEEE International Symposium on Telecommunications","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122716514","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
Performance analysis of two nonblocking space-division packet switches 两种非阻塞空间分组交换机的性能分析
SBT/IEEE International Symposium on Telecommunications Pub Date : 1990-09-03 DOI: 10.1109/ITS.1990.175585
P. Lau, A. Leon-Garcia
{"title":"Performance analysis of two nonblocking space-division packet switches","authors":"P. Lau, A. Leon-Garcia","doi":"10.1109/ITS.1990.175585","DOIUrl":"https://doi.org/10.1109/ITS.1990.175585","url":null,"abstract":"The authors analyze and compare two classes of space-division packet switches: rearrangeable nonblocking and strictly nonblocking. Switch capacity, delay, and packet loss probability are used as the performance measures. Some insights into the rearrangeable nonblocking switch are also provided.<<ETX>>","PeriodicalId":405932,"journal":{"name":"SBT/IEEE International Symposium on Telecommunications","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115593328","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
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