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Communications Magazine, IEEE

Issue 7 • Date July 1993

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Displaying Results 1 - 14 of 14
  • An overview of telecommunications planning in China

    Publication Year: 1993 , Page(s): 18 - 19
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (228 KB)  

    An overview of planning for the public switched telephone network (PSTN) in China is presented. Telecommunications planning is performed by the Ministry of Posts and Telecommunications (MPT), the government agency responsible for telecommunications research and development, planning, and operation of the overall telecommunications networks in China. The planning process, which produces both fundamental (requirements) and developmental (implementation) plans, is described.<> View full abstract»

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  • Driving forces behind China's explosive telecommunications growth

    Publication Year: 1993 , Page(s): 20 - 22
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    The driving forces behind rapid growth of telecommunications in China and the potential developments in the telecommunications industry in that country are described. The driving forces include investment and tariff charges, growth-enabling technologies, and employee incentives established at the local and national level.<> View full abstract»

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  • New concept and hierarchy for telecommunications standards

    Publication Year: 1993 , Page(s): 24 - 28
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    The factors leading to the formulation of standards to meet the rapid expansion of telecommunications in China are discussed. The categories chosen for the standards and their use in managing the deployment of telecommunications networks in China are described. The standards development approach used creates standards that involve the adoption of a layered approach to networking and the definition of sets of open standards for each of these layers. The resulting integrated network is divided into three layers: the bearer layer, support layer, and service layer. To provide this layered approach, four types of telecommunications standards, appropriate to the functional needs of organizations using the standards, have been developed. The four functional types are: telecommunications basic technical standards, engineering and construction standards, operations and maintenance standards, and telecommunications general standards.<> View full abstract»

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  • Telecommunications services in China

    Publication Year: 1993 , Page(s): 30 - 33
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (382 KB)  

    An overview of telecommunications services in the public switched telephone network (PSTN) and public switched packet data network (PSDN) in China is presented. Public telephone, data, telegraph, telematic, and future directory services provided by these networks are discussed.<> View full abstract»

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  • Network planning methodology and practice in China

    Publication Year: 1993 , Page(s): 34 - 37
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (477 KB)  

    The methods used in local network planning for the public telecommunications network in China are discussed. Network modeling, computer simulation, and planning software used in the planning process are described. A computer-aided planning tool for local telephone networks (CAPTLN), composed of three software modules that provide traffic forecasting, network optimization, and network economic analysis for the local network of the public switched telephone network (PSTN), is also discussed. Other tools are similarly used for all other parts of the PSTN network, such as international access, toll switching and trunking, signaling and synchronization.<> View full abstract»

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  • Satellite and terrestrial microwave communications in China

    Publication Year: 1993 , Page(s): 38 - 40
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    China deploys satellite communications, microwave radio links, and optical fiber systems as three major transmission infrastructures for its public switched telephone network (PSTN). The deployment of the first two of these infrastructures, satellite communications and radio links, is described.<> View full abstract»

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  • R&D activities on wireless systems in China

    Publication Year: 1993 , Page(s): 42 - 45
    Cited by:  Papers (1)
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    Various wireless systems and the research preceding their practical use in China are described. The topics discussed include research establishments, research and development projects underway, challenges inherent to digital radio, and expansion opportunities afforded by satellite communications.<> View full abstract»

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  • Present status and outlook of line transmission systems in China

    Publication Year: 1993 , Page(s): 46 - 47
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    The various line transmission media, including open wires, symmetrical pair cables, coaxial cables, and optical fiber cable, that are used in the different regions of China are described. Both analog transmission systems and the newer digital transmission systems are discussed. The standardized physical transmission media deployed throughout China-symmetrical pair cables, coaxial cables, and optical fiber cables-are also discussed.<> View full abstract»

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  • Status of R&D on optical fiber communications systems in China

    Publication Year: 1993 , Page(s): 48 - 50
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    Research and development in China on optical fiber communications systems, including traditional high bit rate, coherent, and optical soliton systems is described. Their potential for telecommunications systems applications are outlined.<> View full abstract»

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  • Public switching deployment in China

    Publication Year: 1993 , Page(s): 52 - 55
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    An overview of telecommunications switching systems currently deployed in China is presented. The hierarchy of China's automatic public switched telephone network (PSTN) and the common channel signaling that is being deployed in the PSTN are discussed. China's national synchronization network, switching deployment, and numbering plan are also discussed.<> View full abstract»

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  • Switching systems and switching software development in China

    Publication Year: 1993 , Page(s): 56 - 60
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    The architectures of two medium-sized digital telephone switching systems that were developed in China, the DS-30 and HJD-04 systems, are discussed. The DS-30 is a 30000 line digital telephone switching system, with a total capacity of 300000 busy hour call attempts (BHCA) using digital line concentration and a time-space-time switch fabric. Its architecture is a distributed control, multistage, multiprocessor system with load and function sharing. The HJD-04 is a 30000 line digital telephone switching system, with a total capacity of 2 million BHCA. The significant feature of the HJD-04 system is its switching network, which consists of a single time switch. The structure of the switching software support environment used in China is discussed.<> View full abstract»

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  • An overview of optical device research in China

    Publication Year: 1993 , Page(s): 62 - 65
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    An overview of research activities in China on the following optical communications devices is presented: quantum-well semiconductor lasers; distributed feedback laser diodes; wideband, tunable, narrow-linewidth, external-cavity laser diodes, semiconductor and doped-fiber amplifiers; laser-diode-pumped solid state and single-crystal fiber lasers; doped fiber ring lasers, optical modulators; switches; bistable devices; experimental wavelength-division-multiplexed (WDM) systems; and time-division photonic switching systems. The most important of these technologies are highlighted with respect to demonstrated achievements in China. The potential uses of these technologies in future telecommunications systems are discussed.<> View full abstract»

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  • VLSI technology in China

    Publication Year: 1993 , Page(s): 66 - 69
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    Very-large-scale integration (VLSI) technology applications, developments, and markets in China are discussed. It is suggested that VLSI technology is gaining momentum in China, especially in the area of application specific integrated circuits (ASICs) development. The key issues in ASIC design are outlined, and research and development in microelectronics for telecommunications is described.<> View full abstract»

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  • Advances in coding and compression

    Publication Year: 1993 , Page(s): 70 - 72
    Cited by:  Patents (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (381 KB)  

    The significant activity that has taken place in China on source coding is reviewed. This includes three of the most important source coding techniques used for speech compression-waveform coders, vocoders, and hybrid coders-and a number of techniques used to implement image compression. Two other areas of active communications research, channel coding and cryptography, are discussed.<> View full abstract»

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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.

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Editor-in-Chief
Osman Gebizlioglu
Huawei Technologies