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A queueing model for ATM-based multi-media communication systems 基于atm的多媒体通信系统的排队模型
IEEE International Conference on Communications, Including Supercomm Technical Sessions Pub Date : 1990-04-16 DOI: 10.1109/ICC.1990.117089
X. Jiang, J. Meditch
{"title":"A queueing model for ATM-based multi-media communication systems","authors":"X. Jiang, J. Meditch","doi":"10.1109/ICC.1990.117089","DOIUrl":"https://doi.org/10.1109/ICC.1990.117089","url":null,"abstract":"The authors present analytic results for a discrete-time nonpreemptive priority queuing system which can be used to model ATM (asynchronous transfer mode)-based multimedia communication systems which give different priorities to various types of traffic. In addition to specifying the average waiting times, they provide a closed-form solution for the queuing system delay. Thus, higher order moments and probability mass function of delay can be obtained and used to evaluate the performance for delay constrained traffic. The derivation for the moment generating function of the time a customer spends in the system is presented. The results are briefly discussed. Although only the moment generating functions for class-1 and class-2 customers have been derived, the procedures developed can be used to extend the results to additional priority classes and can also be applied to preemptive priority queuing systems.<<ETX>>","PeriodicalId":126008,"journal":{"name":"IEEE International Conference on Communications, Including Supercomm Technical Sessions","volume":"150 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133278912","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
Evolution of the local switched network 本地交换网络的发展
IEEE International Conference on Communications, Including Supercomm Technical Sessions Pub Date : 1990-04-16 DOI: 10.1109/ICC.1990.117145
T. Starr, C. Yu
{"title":"Evolution of the local switched network","authors":"T. Starr, C. Yu","doi":"10.1109/ICC.1990.117145","DOIUrl":"https://doi.org/10.1109/ICC.1990.117145","url":null,"abstract":"The major directions for the multidimensional evolution of the local switched network are discussed together with the forces behind these changes. These directions fit within three themes: improved network operations, increased bandwidth, and service flexibility. It is projected that network operations efficiency will improve, especially in the area of ISDN (integrated services digital network) OAM&P (operations, administration, maintenance, and provisioning). Bandwidth capabilities in switching and transmission will expand through MANs (metropolitan area networks), BISDN (broadband ISDN) and 1.5 Mb/s switched services. Flexibility will increase for service customization and vendor selection. The intelligent network will restructure the positioning of service control to permit more rapid feature introduction. In a cooperative effort, vendors and network providers will form industry standards that will provide the directions for this evolution.<<ETX>>","PeriodicalId":126008,"journal":{"name":"IEEE International Conference on Communications, Including Supercomm Technical Sessions","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132034004","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
Monitoring integrated networks for performance management 监控集成网络，进行性能管理
IEEE International Conference on Communications, Including Supercomm Technical Sessions Pub Date : 1990-04-16 DOI: 10.1109/ICC.1990.117094
S. Mazumdar, A. Lazar
{"title":"Monitoring integrated networks for performance management","authors":"S. Mazumdar, A. Lazar","doi":"10.1109/ICC.1990.117094","DOIUrl":"https://doi.org/10.1109/ICC.1990.117094","url":null,"abstract":"An object-oriented model for network independent monitoring and performance evaluation in real-time is presented. the model describes the behavior of network objects by a set of state variables and a set of invariants. The model is used to evaluate quality-of-service characteristics of different classes of traffic in an integrated network testbed. An objective-driven measurement strategy to establish the dynamic database of the network is discussed. A statistical database derived from the dynamic database is also obtained.<<ETX>>","PeriodicalId":126008,"journal":{"name":"IEEE International Conference on Communications, Including Supercomm Technical Sessions","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122876606","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: 25
Applications of CASE for requirements and design in communications systems CASE在通信系统需求和设计中的应用
IEEE International Conference on Communications, Including Supercomm Technical Sessions Pub Date : 1990-04-16 DOI: 10.1109/ICC.1990.117099
J. Krist
{"title":"Applications of CASE for requirements and design in communications systems","authors":"J. Krist","doi":"10.1109/ICC.1990.117099","DOIUrl":"https://doi.org/10.1109/ICC.1990.117099","url":null,"abstract":"The author discusses the application of CASE (computer-aided software engineering) to the requirements and design specification (front-end process) of communications software. It is noted that CASE tools do not yet scale up to the requirements imposed by very large systems. Current automation technologies are limited and overemphasis on automation can decrease productivity. Incremental approaches to using CASE tools are appropriate given their current capabilities and the scale of problem being addressed. It is concluded that CASE technology can help people communicate more clearly during front-end analysis of requirements and design. Understanding technology transfer is essential to achieving benefits from CASE.<<ETX>>","PeriodicalId":126008,"journal":{"name":"IEEE International Conference on Communications, Including Supercomm Technical Sessions","volume":"195 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123087795","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
Bit-rate reduction techniques based on DCT for HDTV transmission 基于DCT的HDTV传输比特率降低技术
IEEE International Conference on Communications, Including Supercomm Technical Sessions Pub Date : 1990-04-16 DOI: 10.1109/ICC.1990.117334
M. Barbero, R. Del Pero, M. Muratori, M. Stroppiana
{"title":"Bit-rate reduction techniques based on DCT for HDTV transmission","authors":"M. Barbero, R. Del Pero, M. Muratori, M. Stroppiana","doi":"10.1109/ICC.1990.117334","DOIUrl":"https://doi.org/10.1109/ICC.1990.117334","url":null,"abstract":"A hybrid discrete cosine transform system has been developed within the framework of the European project EU 256, with the goal of transmitting high-definition television signals of contribution quality at about 140 Mb/s and 4:2:2 signals at 32 to 45 Mb/s. The joint optimization of coding algorithms, framing structure, and codec architecture will provide for good picture quality and performance with regard to channel errors. The choice of variable-length code has been demonstrated to be very important not only for the coding efficiency but also for performance in the presence of errors.<<ETX>>","PeriodicalId":126008,"journal":{"name":"IEEE International Conference on Communications, Including Supercomm Technical Sessions","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121306631","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
Construction of M-PSK trellis codes and performance analysis over fading channels M-PSK网格码的构造及衰落信道性能分析
IEEE International Conference on Communications, Including Supercomm Technical Sessions Pub Date : 1990-04-16 DOI: 10.1109/ICC.1990.117152
B. Vucetic, J. Nicolas
{"title":"Construction of M-PSK trellis codes and performance analysis over fading channels","authors":"B. Vucetic, J. Nicolas","doi":"10.1109/ICC.1990.117152","DOIUrl":"https://doi.org/10.1109/ICC.1990.117152","url":null,"abstract":"By using derived analytical bounds, the authors show that to minimize the error probability of MPSK TCM (trellis coded modulation) codes on fading channels the free Euclidean distance should be maximized for large ECL (effective code length) codes. For short ECLs, however, the ECL and the minimum PD (product distance) are used as the design criteria to obtain better codes than corresponding Ungerboeck codes. By using a simulation method, it is shown that the code performance is extremely sensitive to interleaving depths and that the penalty due to nonideal interleaving is high. The results also indicate much less sensitivity of trellis codes to decoding decision depths on fading channels than on Gaussian channels, allowing higher interleaving degrees on delay-constrained communication systems. Error performance bounds are derived for MPSK trellis codes over Gaussian and fading channels in the presence of phase noise. Coherent demodulation combined with the transparent tone in band technique (TTIB) for phase recovery is evaluated.<<ETX>>","PeriodicalId":126008,"journal":{"name":"IEEE International Conference on Communications, Including Supercomm Technical Sessions","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129018732","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: 7
Efficient and modified round-robin protocols for fiber optic networks 光纤网络的高效和改进的轮询协议
IEEE International Conference on Communications, Including Supercomm Technical Sessions Pub Date : 1990-04-16 DOI: 10.1109/ICC.1990.117349
A. C. Lantz, B. Mukherjee
{"title":"Efficient and modified round-robin protocols for fiber optic networks","authors":"A. C. Lantz, B. Mukherjee","doi":"10.1109/ICC.1990.117349","DOIUrl":"https://doi.org/10.1109/ICC.1990.117349","url":null,"abstract":"Several packet-switched, multiaccess protocols based on round-robin scheduling have been proposed for fiber-optic networks, e.g. D-Net, Expressnet, and Fasnet. The authors study simple modifications to these round-robin protocols in order to improve the channel capacity for fixed packet length. A representative example modification of D-Net based on generating periodic locomotives is called scheduled D-Net. A further modification, which combines the beneficial properties of unmodified and scheduled D-Net, results in an even more efficient mixed D-Net protocol. The authors outline, approximately model, and analyze scheduled and mixed D-Net protocols, and demonstrate quantitatively how these protocols outperforms unmodified D-Net. For this comparison, the protocols' delay-throughput characteristics are sued as the performance metric. Simulation results are also included.<<ETX>>","PeriodicalId":126008,"journal":{"name":"IEEE International Conference on Communications, Including Supercomm Technical Sessions","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129373675","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
A simplified theory of shuffling (HDTV applications) 一种简化的洗牌理论(HDTV应用)
IEEE International Conference on Communications, Including Supercomm Technical Sessions Pub Date : 1990-04-16 DOI: 10.1109/ICC.1990.117363
G. Cariolaro, R. Rinaldo, L. Tomba
{"title":"A simplified theory of shuffling (HDTV applications)","authors":"G. Cariolaro, R. Rinaldo, L. Tomba","doi":"10.1109/ICC.1990.117363","DOIUrl":"https://doi.org/10.1109/ICC.1990.117363","url":null,"abstract":"Shuffling is a standard technique used in compatible high-definition television systems where, in connection with subsampling, it permits the halving of the number of lines, e.g. from a 1250/2:1/50 format to a 625/2:1/50 format. The authors analyze the process in detail considering only the first quincunx field of the four subsampled fields (the two-dimensional model). First, the two-dimensional shuffling operation is formulated in an appropriate signal theory framework. An equivalent model for shuffling is then derived: it consists of two vertical filters and one horizontal modulator, which is useful for shuffling frequency-domain analysis. As an example of shuffling theory application, spectral analysis of the shuffling error in MAC compatible systems is carried out.<<ETX>>","PeriodicalId":126008,"journal":{"name":"IEEE International Conference on Communications, Including Supercomm Technical Sessions","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128821241","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
The implications of window sharing for a virtual terminal protocol 虚拟终端协议中窗口共享的含义
IEEE International Conference on Communications, Including Supercomm Technical Sessions Pub Date : 1990-04-16 DOI: 10.1109/ICC.1990.117037
J. Patterson
{"title":"The implications of window sharing for a virtual terminal protocol","authors":"J. Patterson","doi":"10.1109/ICC.1990.117037","DOIUrl":"https://doi.org/10.1109/ICC.1990.117037","url":null,"abstract":"Window sharing permits simultaneous presentation of information on multiple workstations. As a ubiquitous capability, it requires a virtual terminal standard that is in widespread use. Ways in which window sharing can affect the definition of a virtual terminal protocol are considered. Guidelines are offered to suggest how a virtual terminal protocol might best accommodate window sharing. The guidelines address the need to support extra-application communication, such as annotation; the need to encourage application-relative references; the need to avoid autonomous output from the virtual terminal; and the need to maintain the state of the shared windows.<<ETX>>","PeriodicalId":126008,"journal":{"name":"IEEE International Conference on Communications, Including Supercomm Technical Sessions","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128758023","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
Overmodulated single-octave subcarrier multiplexed optical networks for multichannel FM video distribution 用于多通道调频视频分发的过调制单倍频子载波多路光网络
IEEE International Conference on Communications, Including Supercomm Technical Sessions Pub Date : 1990-04-16 DOI: 10.1109/ICC.1990.117112
F. Mendis, B. T. Tan
{"title":"Overmodulated single-octave subcarrier multiplexed optical networks for multichannel FM video distribution","authors":"F. Mendis, B. T. Tan","doi":"10.1109/ICC.1990.117112","DOIUrl":"https://doi.org/10.1109/ICC.1990.117112","url":null,"abstract":"In subcarrier multiplexed (SCM) multichannel FM video systems, the carrier-to-noise ratio per channel may be increased by overmodulating the laser diode source. The authors predict the overmodulation that may be employed in practice for single-octave SCM transmission in passive optical networks. It is shown that optical modulation indices (OMI) exceeding 500% may be used if the number of subcarriers is large. A 47 dB signal-to-noise ratio (with 4 dB margin) is deemed sufficient for acceptable picture quality in cable distribution systems, while a 56 dB value would be required for long-distance point-to-point optical links.<<ETX>>","PeriodicalId":126008,"journal":{"name":"IEEE International Conference on Communications, Including Supercomm Technical Sessions","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129052389","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
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