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Communications Magazine, IEEE

Issue 3 • Date March 1985

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Displaying Results 1 - 24 of 24
  • [Front cover and table of contents]

    Page(s): 0
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  • President's message

    Page(s): 3
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  • Guest editorial

    Page(s): 6
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  • ISDN protocol architecture

    Page(s): 15 - 22
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    IT IS NOW widely recognized that the Integrated Services Digital Network (ISDN) concept is providing a useful framework for the development of future telecommunications networks and services. An ISDN can be regarded as a generalpurpose digital network capable of supporting (or integrating) a wide range of services (voice and non-voice) using a small set of standard multipurpose user-network interfaces. Relevant CCITT Recommendations (or standards) on ISDN interfaces were expected to be available in 1984, the final year of the current study period. This paper reviews CCITT progress on the architectural studies of protocols associated with ISDN's, in particular, the ISDN Protocol Reference Model being developed by Study Group XVIII. This Model, based on the concepts and principles of the ISO/CCITT Open Systems Interconnection (OSI) Reference Model, aims at providing a unified framework for modeling ISDN multiservice communications and capabilities. The new Model is applied to several possible ISDN communications configurations, enabling a number of technical issues to be easily identified. View full abstract»

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  • The DARPA internet protocol suite

    Page(s): 29 - 34
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    THE MILITARY requirement for computer communications between heterogeneous computers on heterogeneous networks has driven the development of a standard suite of protocols to permit such communications to take place in a robust and flexible manner. These protocols support an architecture consisting of multiple packet switched networks interconnected by gateways. The DARPA experimental internet system consists of satellite, terrestrial, radio, and local networks, all interconnected through a system of gateways and a set of common protocols. View full abstract»

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  • An informal overview of formal protocol specification

    Page(s): 46 - 52
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    A RAPIDLY GROWING area of research in computer communications is formal protocol specification. The importance of protocols arises from the fact that protocols form the nervous system of teleprocessing networks and, as such, are responsible for ensuring that the pieces of the system work as a harmonious whole. The complexity and size of today's systems and the fact that they are put together from subsystem components manufactured in different locations and even by different companies, virtually demand formal specification. And, there are many side benefits, as this tutorial points out. View full abstract»

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  • Mobile packet radio networks: State-of-the-art

    Page(s): 53 - 61
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    MUCH WORK HAS been done in the areas of packet switching, packet radio, and random communication channels. However, efforts combining these areas are not as plentiful. There are several reasons for this. One reason is, the packet communications area is relatively young. Much of the research into packet communications has been accomplished by computer scientists rather then communications engineers, with a resulting emphasis on architecture, protocols, software, and so on. Even the development of packet radio has not fostered extensive examination of link effects on system performances. The UHF line-of-sight links and SHF satellite links have been assumed to be perfect with packet collisions as the dominant error source, which is a good assumption under normal circumstances. However, abnormal circumstances including ionospheric scintillations and multipath fading are another source of error on degraded packet radio links, which characterize Mobile Packet Radio Networks (MPRNET). In this paper we define and discuss Mobile Packet Radio Networks and presend their channel characteristics. The performance avaluation of some channel access protocols for a Mobile Packet Radio Network link, which is a typical example of a degraded packet radio channel, is descirbed. View full abstract»

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  • GLOBECOM '84

    Page(s): 66 - 67
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  • From the board of governors

    Page(s): 68
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  • Book reviews - Data communications techniques and technologies

    Page(s): 69
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  • Book reviews - Principles of digital data transmission(second edition)

    Page(s): 69
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  • JSAC/transactions: Looking ahead

    Page(s): 70
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  • Scanning the literature

    Page(s): 71 - 73
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  • News from the ITU

    Page(s): 74 - 75
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  • Solution to puzzle no. 30

    Page(s): 75
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  • Conference calendar

    Page(s): 76 - 77
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  • Future conferences

    Page(s): 78
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  • Communicrostic no. 31

    Page(s): 79
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  • Classified ads

    Page(s): 80
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  • Advertisers' index

    Page(s): 80
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  • [Back cover]

    Page(s): c4
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Aims & Scope

IEEE Communications Magazine covers all areas of communications such as lightwave telecommunications, high-speed data communications, personal communications systems (PCS), ISDN, and more.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Osman Gebizlioglu
Huawei Technologies