IEEE International Conference on Communications, Including Supercomm Technical Sessions

16-19 April 19906

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  • IEEE International Conference on Communications ICC '90 Including Supercomm Technical Sessions. SUPERCOMM ICC '90 Conference Record (Cat. No.90CH2829-0)

    Publication Year: 1990
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    Freely Available from IEEE
  • The impact of evolving telecommunications technology on radio spectrum utilization

    Publication Year: 1990
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    Summary form only given. Presents a broad cross section of participating engineers from organizations involved in the coordination, design, and operation of radio systems. Present-day digital switching and multiplex techniques have shifted the emphasis from analog radio and metallic cable to digital radio and fiber-optic cable. The radio industry was once dominated by long-haul designs in 4- and 6... View full abstract»

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  • Technology for millimetre wave systems

    Publication Year: 1990
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    Summary form only given. The use of the millimeter-wave spectrum above 30 GHz for telecommunications offers considerable bandwidth for broadband services, but power limitations and rain attenuation constrain its prospects to small 'cell' or short-hop systems. Nevertheless, given suitable low-cost 'consumer' technology, there is considerable attraction for local access and interconnect services whe... View full abstract»

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  • Shifting demands for radio spectrum

    Publication Year: 1990
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    Summary form only given. The past decade has signaled fundamental new trends in the use of radio spectrum. The trends relate to telecommunications market drivers, as well as technological developments. The market drivers include increasing demands for data transmission, higher capacity facilities, flexibility, and greater personal control of communications. Technological responses to these demands... View full abstract»

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  • Network planning for the 1990s

    Publication Year: 1990
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    Summary form only given, as follows. The deregulation of the US telecommunications industry has resulted in increased use of the electromagnetic spectrum. Although fiber-optics transmission uses segment of this spectrum, the microwave frequency bands from 1.0 to 20.0 GHz have encountered increased usage as additional capacity requirements arise. With this increased usage by industry, the spectrum ... View full abstract»

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  • Capacity/modulation tradeoffs in going from 64 QAM to 256 QAM

    Publication Year: 1990
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    Summary form only given. Increasing the modulation complexity permits significant improvements in bandwidth efficiency. However, the higher level modulation schemes must include additional countermeasures to minimize increased susceptibility to dispersion, loss of threshold, further transmitter power backoff, and increased interference susceptibility.<> View full abstract»

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  • The impact of emerging cellular technologies on radio spectrum utilization in the 1990s

    Publication Year: 1990
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    Summary form only given. Many new potentially spectral efficiency technologies have emerged recently, e.g. digital cellular radio, linear radio channels, microcellular technology, and low-bit-rate speech encoding. The author examines the characteristics of these emerging cellular technologies, particularly in terms of spectrum utilization, cost, and availability. He also examines the potential gai... View full abstract»

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  • Increased complexities of frequency coordination due to telecommunications advances

    Publication Year: 1990
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    Summary form only given. Changes in the telecommunications industry in recent years have produced a major impact on the utilization of the radio spectrum. First, the regulatory changes of the seventies opened telecommunications to a wide array of companies, and whole new industries began to put tremendous pressure on the available radio spectrum. Next, technological advances that were made in resp... View full abstract»

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  • Problems in telecommunication development and application of modern information technology in the USSR

    Publication Year: 1990
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    Summary form only given. The problems of creating new means of telecommunication and the application of modern information technology in the USSR are addressed. Some specific features of communications technology development in the USSR are outlined. It is concluded that the process of integrating communication equipment and computers should lead to the creation of an entire digital switching and ... View full abstract»

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  • Optical fibre transmission system equipment in the USSR

    Publication Year: 1990
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    Summary form only given. The development of the communication network in the USSR is largely provided by installation of urban and long-distance optical fiber communication lines. Equipment that allows bit rates of 8, 34, and 140 Mb/s in data transmission over graded-index and single-mode fiber-optic cables at 1.3- mu m wavelength is designed and manufactured. Equipment for transmission of digital... View full abstract»

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  • Professional communication in the USSR

    Publication Year: 1990
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    Summary form only given. Aspects of the Soviet state system of scientific-technical information, i.e. professional communication, are discussed, and the problems of setting up and developing an automatic center network are considered. The methods and forms of information services and the information-logic analysis of knowledge and processing in the USSR are discussed. Also considered are the probl... View full abstract»

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  • Optical transmitters and receivers for fast optoelectronics

    Publication Year: 1990
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    Summary form only given. The increasing bit rate of optical communication systems and the possibility of developing very fast optoelectronic functional elements have stimulated intensive investigations of the dynamic properties of semiconductor lasers (SLs) and fast photodiodes. The influence of optical feedback on the spectral and noise properties of different kinds of SLs, including distributed-... View full abstract»

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  • High-power quantum-well InGaAsP/InP lasers and their coupling with the optical fibers

    Publication Year: 1990
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    Summary form only given. An investigation of high-power broad-stripe lasers and the possibility of their effective coupling with multimode optical fiber was carried out. Laser wafers were grown by a modified LPE (liquid-phase-epitaxy) growth technique utilizing short-term active layer deposition on a moving substrate. Optical fibers with central core diameters of 50, 100, and 200 mu m and NALFA of... View full abstract»

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  • Travelling-wave integrated-optical modulator with spread frequency response

    Publication Year: 1990
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    Summary form only given. The authors fabricated planar electrode structures for travelling-wave integrated optical modulators which allow the spread of the FR (frequency response) and simultaneous decrease of drive power in a fixed-frequency band. This is achieved by a smooth change of value and sign or electrooptical interaction according to the appropriate functional dependence, which, in the ab... View full abstract»

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  • Automatic routing of integrated circuit connections: a tutorial

    Publication Year: 1990, Page(s):801 - 805 vol.3
    Cited by:  Patents (2)
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    An introduction to automatic integrated-circuit routing is presented. Particular attention is given to the types of routing algorithm, global and detailed routing, and improving routing and routability.<> View full abstract»

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  • On optimal self-orthogonal quasi-cyclic codes

    Publication Year: 1990, Page(s):1256 - 1260 vol.3
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    Some infinite classes of optimal self-orthogonal quasi-cycle (SOQC) equal/unequal error protection codes are presented. These codes are specified by corresponding block designs. Several optimal SOQC codes which were not found by Townsend and Weldon (1967) are also given. From the point of view of implementation, the systematic form of the code has some important advantages. Because of the quasi-cy... View full abstract»

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  • Adaptive signalling in distributed self-organizing mobile packet radio networks

    Publication Year: 1990, Page(s):1221 - 1225 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (452 KB)

    Adaptive signaling policies are developed that increase the utilization of the signaling channel without the requisite decrease in the data channel capacity. The increased responsiveness of a packet radio network obtained using the adaptive signaling policies is examined as an example. Improved network responsiveness was obtained for those networks where the signaling channel cycle length must be ... View full abstract»

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  • An optimal topology design algorithm for multiple traffic using both dialed up and rented capacities

    Publication Year: 1990, Page(s):1215 - 1220 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (372 KB)

    An optimal multitraffic topology design algorithm is presented. It is used to find the optimal topology with respect to a set of input traffic patterns when the operating budget is fixed. The long-haul trunks are assumed to be rented from a carrier in a continuously rented or dialed-up manner. A numerical example is given View full abstract»

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  • A capacity assignment method with different types of channel capacities for packet switched networks

    Publication Year: 1990, Page(s):1210 - 1214 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    A novel capacity assignment method for packet switched networks, accepting different types of channel capacities, is proposed. The average packet time delay for each origin destination node pair is taken as a constraint. The method converts a capacity assignment problem into three stages. The first two stages are nonlinear optimization problems and the third is an integralization stage. In the thi... View full abstract»

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  • Requirements and prospects for multiservice business networks

    Publication Year: 1990, Page(s):1446 - 1450 vol.4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (484 KB)

    The authors address new architectural concepts for organizing heterogeneous network components into a system framework. Reference scenarios foreseeable in the following decade are given, with the interaction of market trends and technical achievements taken into account. After a requirements analysis, a multiservice business network architecture suitable for early deployment and with the possibili... View full abstract»

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  • Switched vs. broadcast video for fiber-to-the-home systems

    Publication Year: 1990, Page(s):1109 - 1119 vol.3
    Cited by:  Papers (1)  |  Patents (32)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (532 KB)

    The potential benefits of the state of the art in fiber-based video transmission for both broadcast and switched network configurations are examined, and these designs are compared based on performance, channel capacities, compatibility, ability to provide new interactive services, and cost per subscriber. Analysis results show that the broadcast network provides the best compatibility with video ... View full abstract»

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  • Simulated annealing for throughput optimization in communication networks with window flow control

    Publication Year: 1990, Page(s):1202 - 1209 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    A queuing model of a multichain network is presented where the network is window flow controlled on its virtual channel of the communication network. Its performance is optimized based on simulated annealing. The solution space is assumed to be the set of all admissible service rates of all stations with the nonlinear cost constraint. The optimum total throughput of the network is determined for d... View full abstract»

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  • Leased private network management: the CNO experience

    Publication Year: 1990, Page(s):223 - 227 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    In October 1988, AT&T successfully implemented the Custom Network Option (CNO) service. CNO provides large-business customers with a shared private digital switched network. To fulfil customer requirements, extensive network management capabilities had to be provided. Specifically, customers required real-time call, traffic, and network status information, along with on-demand testing capabili... View full abstract»

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  • Extending the range of high-speed servers

    Publication Year: 1990, Page(s):1440 - 1445 vol.4
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    It is pointed out that the increasing speeds of fiber-optic data networks provide the ability to move large quantities of data into and out of very-high-speed computers. The emerging IEEE 802.6 standard on metropolitan area networks will provide high-speed access over full metropolitan areas without limitations imposed by the use of private fibers, data rates of 310 Mb/s with full-time bidirection... View full abstract»

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  • Digital picture code transmission by carrier phase modulation in AM radio transmitter

    Publication Year: 1990, Page(s):1622 - 1626 vol.4
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (292 KB)

    A novel system for concurrently transmitting audio signals and digital codes from an AM radio station to each receiver is presented. Experiments for sending a still picture from the AM radio station to the receiver have been carried out to check whether the present system is satisfactory. Digital codecs were transmitted at a baud rate of 300 b/s with 2-φ to 4-φ phase-shift keying, and the ... View full abstract»

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