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IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond最新文献

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Delay analysis of a single server queue with Poisson cluster arrival process arising in ATM networks ATM网络中具有泊松集群到达过程的单服务器队列延迟分析
IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond Pub Date : 1989-11-27 DOI: 10.1109/GLOCOM.1989.64042
K. Sohraby
{"title":"Delay analysis of a single server queue with Poisson cluster arrival process arising in ATM networks","authors":"K. Sohraby","doi":"10.1109/GLOCOM.1989.64042","DOIUrl":"https://doi.org/10.1109/GLOCOM.1989.64042","url":null,"abstract":"Poisson cluster processes (PCPs) can be used to model arrival processes in ATM (asynchronous transfer mode) networks. These processes are bursty, and there is a strong correlation between the successive arrivals. Different approximation methods which capture the burstiness and the correlation between the successive events on the average waiting time for the PCP/D/1 queue are examined. The notion of effective batchiness is introduced, and its properties are given. In particular, it is shown that, in light traffic, the correlation between arrivals has little effect on the average wait, and it approaches to that of the classical M/D/1 queue, i.e. a minimum effective batchiness of 1. In heavy traffic, the average wait approaches to that of the M/sup x//D/1 queue, i.e. a batch Poisson arrival which results in the maximum effective batchiness given in terms of the first two moments of the cluster size.<<ETX>>","PeriodicalId":256305,"journal":{"name":"IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129043489","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: 23
An adaptive QAM linearizer using data postdistortion 使用数据后失真的自适应QAM线性化器
IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond Pub Date : 1989-11-27 DOI: 10.1109/GLOCOM.1989.64004
J. P. Moffatt, J.P. MacEachern
{"title":"An adaptive QAM linearizer using data postdistortion","authors":"J. P. Moffatt, J.P. MacEachern","doi":"10.1109/GLOCOM.1989.64004","DOIUrl":"https://doi.org/10.1109/GLOCOM.1989.64004","url":null,"abstract":"An adaptive Volterra linearizer for reducing channel nonlinearities in QAM (quadrature amplitude modulation) data transmission systems is described, and its performance is evaluated. The linearizer is implemented as a modern receiver digital circuit which employs two read-only memories that are programmed to cancel either third- or fifth-order nonlinearities. The memory outputs are scaled by adaptive coefficients which minimize the channel nonlinearity. The linearizer has been shown to be effective for input nonlinear bit error rates up to 10/sup -3/. At input error rates up to 10/sup -6/, the linearizer reduces the nonlinear error rate by five orders of magnitude in a 64-QAM digital radio system, and the linearized system has a selective fading performance approximately equal to that of a linear system. The circuit is entirely digital and can be manufactured with automated processes.<<ETX>>","PeriodicalId":256305,"journal":{"name":"IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129208795","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Supporting multi-phase groupware over long distances 支持远距离多相群件
IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond Pub Date : 1989-11-27 DOI: 10.1109/GLOCOM.1989.64150
S. Ahuja, J. Ensor, J. Koszarek, M. Pack
{"title":"Supporting multi-phase groupware over long distances","authors":"S. Ahuja, J. Ensor, J. Koszarek, M. Pack","doi":"10.1109/GLOCOM.1989.64150","DOIUrl":"https://doi.org/10.1109/GLOCOM.1989.64150","url":null,"abstract":"Multiphase groupware supports people during both the individual and interactive phases of a collaboration. The integration of one such multiphase program into a real-time multimedia conferencing environment is discussed. The discussion is based on descriptions of two implementations of a multiphase groupware program, Collaborative Annotator, each using the real-time multimedia conferencing environment provided by the Rapport system. These descriptions highlight design decision and functional capabilities of each implementation approach.<<ETX>>","PeriodicalId":256305,"journal":{"name":"IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127333591","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 FD/DAMA network architecture for the first generation land mobile satellite services 面向第一代陆地移动卫星业务的FD/DAMA网络体系结构
IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond Pub Date : 1989-11-27 DOI: 10.1109/GLOCOM.1989.63929
T. Yan, C. Wang, U. Cheng, K. Dessouky, W. Rafferty
{"title":"A FD/DAMA network architecture for the first generation land mobile satellite services","authors":"T. Yan, C. Wang, U. Cheng, K. Dessouky, W. Rafferty","doi":"10.1109/GLOCOM.1989.63929","DOIUrl":"https://doi.org/10.1109/GLOCOM.1989.63929","url":null,"abstract":"A frequency division/demand assigned multiple access (FD/DAMA) network architecture for the first-generation land mobile satellite services is presented. Rationales and technical approaches are described. In this architecture, each mobile subscriber must follow a channel access protocol to make a service request to the network management center before transmission for either open-end or closed-end services. Open-end service requests will be processed on a blocked call cleared basis, while closed-end requests will be processed on a first-come-first-served basis. Two channel access protocols are investigated, namely a recently proposed multiple channel collision resolution scheme which provides a significantly higher useful throughput, and the traditional slotted ALOHA scheme. The number of channels allocated for either open-end or closed-end services can be adaptively changed according to aggregated traffic requests. Both theoretical and simulation results are presented. Theoretical results have been verified by simulation on the JPL network testbed.<<ETX>>","PeriodicalId":256305,"journal":{"name":"IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond","volume":"164 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132608581","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
Practical applications of human reliability analyses 人的可靠性分析的实际应用
IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond Pub Date : 1989-11-27 DOI: 10.1109/GLOCOM.1989.64070
D. K. Lorenzo
{"title":"Practical applications of human reliability analyses","authors":"D. K. Lorenzo","doi":"10.1109/GLOCOM.1989.64070","DOIUrl":"https://doi.org/10.1109/GLOCOM.1989.64070","url":null,"abstract":"The author discusses some ways in which HRA (human reliability analysis) results have been used to: (1) identify error-likely situations in industrial facilities; and (2) assess the benefits of proposed improvements. Typically, an HRA identifies ways to improve the man-machine interface; the operating, maintenance, and/or emergency procedures; the hardware design; and the management systems related to the task being performed. It is noted that, in many cases, only a qualitative HRA need be performed; the error-likely situations and possible improvements are obvious. In other cases, the HRA must be quantified so that decision makers can judge whether the probability of hyman errors is tolerable and whether the benefits of system changes outweigh the costs. It is concluded that HRA is a practical tool that should be one element of any company's risk management program.<<ETX>>","PeriodicalId":256305,"journal":{"name":"IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133585254","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 multibeam active antenna for an European contiguous coverage at Ku-band 用于欧洲ku波段连续覆盖的多波束有源天线
IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond Pub Date : 1989-11-27 DOI: 10.1109/GLOCOM.1989.64130
G. Bartolucci, G. Leuzzi, C. Paoloni, M. Ruggieri, P. Russo
{"title":"A multibeam active antenna for an European contiguous coverage at Ku-band","authors":"G. Bartolucci, G. Leuzzi, C. Paoloni, M. Ruggieri, P. Russo","doi":"10.1109/GLOCOM.1989.64130","DOIUrl":"https://doi.org/10.1109/GLOCOM.1989.64130","url":null,"abstract":"An active multibeam antenna has been studied with the aim of providing multispot European coverage at Ku-band according to ESA study requirements. The coverage characteristics have been optimized to meet the required directivity, and a compromise has been reached between antenna and payload complexity. The impact of the active concept on system performance and reliability has been evaluated, considering both uniform and unbalanced traffic distribution among the coverage beams. The possible adoption of frequency reuse has also been investigated.<<ETX>>","PeriodicalId":256305,"journal":{"name":"IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130873065","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
Phase-noise and polarization state insensitive coherent optical receivers 相位噪声和偏振状态不敏感相干光接收机
IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond Pub Date : 1989-11-27 DOI: 10.1109/GLOCOM.1989.63997
G. De Marchis, S. Betti, F. Curti, E. Iannone, B. Daino
{"title":"Phase-noise and polarization state insensitive coherent optical receivers","authors":"G. De Marchis, S. Betti, F. Curti, E. Iannone, B. Daino","doi":"10.1109/GLOCOM.1989.63997","DOIUrl":"https://doi.org/10.1109/GLOCOM.1989.63997","url":null,"abstract":"Different schemes that make it possible to compensate both phase-noise and polarization fluctuations due to single mode fibers are presented. The first two systems, double-frequency phase shift keying (DFPSK) and Jones matrix inversion PSK (JMPSK) rely on the principle of transmitting a reference carrier to compensate for the phase noise effect at the receiver. The polarization independence is attained in DFPSK by polarization diversity detection and in JMPSK by the electronic feedforward technique. The second pair of systems, antipodal Stokes parameters shift keying (ASPSK) and differential Stokes parameters shift keying (DSPSK), is based on polarization modulation and Stokes parameter detection. Because the Stokes parameters are independent of the phase terms common to both polarization components, the systems are widely tolerant with respect to the phase noise. The polarization fluctuation insensitivity is realized in ASPSK by means of a feedforward electronic control circuit, while in DSPSK the adopted decision criterion allows instantaneous polarization fluctuation compensation. The first class of systems is suitable for long-haul applications, the second class for local and metropolitan area networks.<<ETX>>","PeriodicalId":256305,"journal":{"name":"IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond","volume":"424 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116693219","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
Meeting the challenge: congestion and flow control strategies for broadband information transport 迎接挑战:宽带信息传输的拥塞和流量控制策略
IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond Pub Date : 1989-11-27 DOI: 10.1109/GLOCOM.1989.64246
A. E. Eckberg, D. Luan, D. Lucantoni
{"title":"Meeting the challenge: congestion and flow control strategies for broadband information transport","authors":"A. E. Eckberg, D. Luan, D. Lucantoni","doi":"10.1109/GLOCOM.1989.64246","DOIUrl":"https://doi.org/10.1109/GLOCOM.1989.64246","url":null,"abstract":"Determining approaches to congestion and flow control, especially real-time components in an overall strategy, is recognized as one of the fundamental challenges facing broadband packet-based information transport, e.g. in the case of B-ISDN/ATM (broadband integrated services digital network/asynchronous transfer mode). Basic issues underlying this subject are summarized and a particular approach to achieving a broadband congestion-, flow-, and error control architecture, based on a core congestion-control strategy called bandwidth management, is described. The modular and layered nature of this control architecture is described and shown to lend itself to a structured approach to characterizing the control architecture performance.<<ETX>>","PeriodicalId":256305,"journal":{"name":"IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116771893","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: 118
A distributed queue metropolitan area network for combined video, voice, wideband data and narrowband data 用于综合视频、语音、宽带和窄带数据的分布式队列城域网
IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond Pub Date : 1989-11-27 DOI: 10.1109/GLOCOM.1989.63958
M. Kadoch, A. Elhakeem
{"title":"A distributed queue metropolitan area network for combined video, voice, wideband data and narrowband data","authors":"M. Kadoch, A. Elhakeem","doi":"10.1109/GLOCOM.1989.63958","DOIUrl":"https://doi.org/10.1109/GLOCOM.1989.63958","url":null,"abstract":"The authors examine a distributed queue metropolitan area network that serves video, voice, and wideband and narrowband data traffic. The protocol that is required for such combined services in the QPSX (queue packet and synchronous circuit exchange) network is proposed, and the performance of this protocol is computed. An integration scheme of the movable frame type is proposed to guarantee different types of services, a basic capacity plus a capacity on the demand. In light of the proposed protocol, the flexibility of the QPSX network was realized. The mathematical model of the proposed system is formulated, and the computation of the performance of a network example is derived. The results show the high capacity potential of such a network. It was found that the best priority scheme is the so-called restricted priority scheme.<<ETX>>","PeriodicalId":256305,"journal":{"name":"IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131451614","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
A growable packet (ATM) switch architecture: design principles and applications 可增长分组(ATM)交换体系结构:设计原则和应用
IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond Pub Date : 1989-11-27 DOI: 10.1109/GLOCOM.1989.64138
K. Eng, M. Karol, Y. Yeh
{"title":"A growable packet (ATM) switch architecture: design principles and applications","authors":"K. Eng, M. Karol, Y. Yeh","doi":"10.1109/GLOCOM.1989.64138","DOIUrl":"https://doi.org/10.1109/GLOCOM.1989.64138","url":null,"abstract":"The authors consider the generic problem of designing a large N*N(N>1000) high-performance, broadband packet (or asynchronous transfer mode) switch. They provide ways to construct arbitrarily large switches out of modest-size packet switches, without sacrificing overall delay/throughput performance. They propose and study a growable switch architecture based on three key principles: (a) a generalized knockout principle which exploits the statistical behavior of packet arrivals and thereby reduces the interconnect complexity; (b) output queuing, which yields the best possible delay/throughput performance; and (c) distributed intelligence in routing packets through the interconnect fabric. Other features include the guarantee of a first-in first-out packet sequence, broadcast and multicast capabilities, and compatibility with variable-length packets. In a broadband ISDN (integrated services digital network) example, the authors show a 2048*2048 switch configuration with building blocks of 42*16 packet switch modules and 128*128 interconnect modules.<<ETX>>","PeriodicalId":256305,"journal":{"name":"IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128180509","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: 122
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