Showing papers on "GSM published in 1988"
28 Nov 1988
TL;DR: It is shown that a (2, 3) decision-feedback equalizer meets the CEPT/GSM objectives over the whole specified range of echo delays and also at high vehicle speeds (up to about 300 km/h), whereas the Viterbi equalizer can cope with the channel distortions produced by echo delays less than about 14-15 mu m.
Abstract: The authors study the performance of adaptive equalizers using the complex fast-Kalman adaptation algorithm (CFKA) and of receivers using the maximum-likelihood sequence estimation method called the Viterbi algorithm in the framework of current research on the pan-European digital mobile radio system in the 900-MHz band. The CEPT/GSM (Conference Europeenne des Postes et Telecommunications/Groupe Special Mobile) system working assumptions, envisaging the use of a synchronization word or preamble sequence, are taken into account. Four types of propagation channels are considered. It is shown that a (2, 3) decision-feedback equalizer using the CFKA meets the CEPT/GSM objectives over the whole specified range of echo delays and also at high vehicle speeds (up to about 300 km/h), whereas the Viterbi equalizer can cope with the channel distortions produced by echo delays less than about 14-15 mu m. >
26 citations
13 Jun 1988
TL;DR: The network functions of the GSM (CEPT's Groupe Special Mobile) system are discussed, e.g., all the functions related to cellular operation.
Abstract: The network functions of the GSM (CEPT's Groupe Special Mobile) system are discussed. They can be divided into four broad categories: network functions required for basic service provision (call handling, subscriber authentication, emergency call, and supplementary services); network functions required for cellular operation (location registration and handover); additional network functions for call handling (queueing, off air call setup, security-related services); and operation and maintenance-oriented network functions. Several of these functions are unique for mobile networks, e.g., all the functions related to cellular operation. Most of the other functions require different or additional implementation in mobile networks as compared to fixed networks. >
15 citations
15 Jun 1988
TL;DR: The authors discuss the PLMN standard with emphasis on the design principles and performance aspects of the control functions and protocols used at the radio interface.
Abstract: A new digital public land mobile network (PLMN) standard is being specified by working group GSM (Groupe Special Mobile) of CEPT (Conference Europeen des Administrations des Postes et des Telecommunications). This standard defines the digital cellular access to voice and nonvoice services provided by the fixed public networks. The key interface of the new standard is the mobile station to base station interface (radio interface). It is specified in a way to offer high-traffic capacity combined with a high quality of service and to accommodate vehicle-mounted and hand-held mobile stations. The authors discuss the PLMN standard with emphasis on the design principles and performance aspects of the control functions and protocols used at the radio interface. >
12 citations
TL;DR: A Regular Pulse Excitation/Long-Term Prediction LPC (RPE-LTP) coding algorithm has been selected as the basis for the standard for the Pan-European cellular system.
10 citations
13 Jun 1988
TL;DR: An insight is provided into the methodology applied to the CEPT GSM (Groupe Special Mobile) pan-European digital cellular mobile radio system and how decisions and system requirements have shaped the specification methodology.
Abstract: An insight is provided into the methodology applied to the CEPT GSM (Groupe Special Mobile) pan-European digital cellular mobile radio system. A description is given of how decisions and system requirements have shaped the specification methodology. The approach is based on proven practice used in other international specifications. The GSM has supplemented the practice with a comprehensive review procedure. The principal goal now is the complete validation of the mandatory interfaces. This activity will then form the final component of the GSM specification methodology. >
8 citations
13 Jun 1988
TL;DR: Type approval of GSM (CEPT Groupe Special Mobile) stations has administrative and technical aspects and the way in which specifications are drafted for individual areas to be tested is indicated.
Abstract: Type approval of GSM (CEPT Groupe Special Mobile) stations has administrative and technical aspects. The administrative procedures are the ones prepared for application to all nets. Broad areas for the testing of technical characteristics are derived from a model of the mobile station. The way in which specifications are drafted for individual areas to be tested is indicated. >
4 citations
13 Jun 1988
TL;DR: The authors describe an adaptive forward error correction (AFEC) protocol in which the information symbols are sent first and subsequently more and more redundancy symbols are added until the receiver has enough symbols to correct the detected errors.
Abstract: The authors describe an adaptive forward error correction (AFEC) protocol in which the information symbols are sent first and subsequently more and more redundancy symbols are added until the receiver has enough symbols to correct the detected errors. Thus, the required redundancy is automatically adapted to the actual channel state. The AFEC works best with maximum distance separable codes, such as Reed-Solomon codes. The authors discuss the throughput and residual error rate performance of this method to facilitate a comparison with existing protocols. When AFEC is used in connection with a fixed-rate data source or communication network, buffers can be used to level out channel fluctuations. Two applications (the wideband CD 900 cellular digital mobile phone system and the pan-European GSM standard) are presented, verifying the efficiency of the proposed data transmission method. >
4 citations
13 Jun 1988
TL;DR: The author describes the course and present status of the GSM (Groupe Special Mobile), to study the possibility of a pan-European system for mobile communication in Europe.
Abstract: During the 1970s and 1980s, many European countries introduced mobile communication systems. Most of these are totally incompatible, and CEPT therefore decided in 1982 to create a working group, GSM (Groupe Special Mobile), to study the possibility of a pan-European system. The author describes the course and present status of this work. >
4 citations
13 Jun 1988
TL;DR: The GSM (CEPT's Groupe Special Mobile) system simulator is a collection of emulation and measurement tools to be used when testing mobile stations for conformance with the CEPT/GSM recommendations.
Abstract: The GSM (CEPT's Groupe Special Mobile) system simulator is a collection of emulation and measurement tools to be used when testing mobile stations for conformance with the CEPT/GSM recommendations. The author presents functions and requirements for the system simulator. The emphasis is placed on functions for signalling testing, since detailed information on the radio measurement equipment is not yet available. >
4 citations
CNET1
TL;DR: The methodology used to select and to adapt a low-bit-rate coding scheme for that system, the GSM system, as well as the major characteristics of the selected algorithm are outlined.
Abstract: A digital cellular mobile system is being studied by CEPT (European Conference of Post and Telecommunication Administration) in order to offer public mobile services throughout Europe. The methodology used to select and to adapt a low-bit-rate coding scheme for that system, the GSM system, as well as the major characteristics of the selected algorithm are outlined. >
TL;DR: The 16 kbit/s speech codec developed by British Telecom Research Laboratories and selected as the UK candidate to the GSM Pan-European study on digital cellular land mobile radio offers several important features including low delay, low computational complexity and a good tolerance to transmission errors.
13 Jun 1988
TL;DR: The various bodies involved in setting European standards in telecommunications and information technology are described and standards for ISDN and the Pan-European mobile communication system are examined.
Abstract: Selection and standardization of network services, as well as standardization of interfaces between various parts of the networks, are considered. The various bodies involved in setting European standards in telecommunications and information technology are described. European standards for ISDN (integrated-services digital network) and standards for the Pan-European mobile communication system are examined. >
13 Jun 1988
TL;DR: It is concluded that careful transmission planning will result in almost unnoticeable performance differences of most mobile conversations as compared to the fixed network.
Abstract: The author addresses the end-to-end transmission performance of speech and data connections involving a GSM (CEPT's Groupe Special Mobile) mobile radio link. The impact of the various GSM subsystems and features on transmission parameters is discussed and the resulting transmission planning implications for both mobile and fixed network operators are outlined. The author concludes that careful transmission planning will result in almost unnoticeable performance differences of most mobile conversations as compared to the fixed network. >
CNET1
TL;DR: The methodology used by the European Conference of Post and Telecommunication Administration to select and to adapt a low bit-rate speech coding scheme for the GSM system, a pan-European mobile telecommunications system, as well as the major characteristics of the selected algorithm are presented.
Abstract: The methodology used by the European Conference of Post and Telecommunication Administration (CEPT) to select and to adapt a low bit-rate speech coding scheme for the GSM system, a pan-European mobile telecommunications system, as well as the major characteristics of the selected algorithm, is presented. An overview of the radio transmission system is included. >
02 Nov 1988
TL;DR: The main features of the GSM mobile radio system are presented and a special attention is devoted to channel coding and the key design issues of the transmission schemes are discussed.
Abstract: The main features of the GSM mobile radio system are presented. A special attention is devoted to channel coding and the key design issues of the transmission schemes are discussed.
13 Jun 1988
TL;DR: A brief overview of the GSM (CEPT's Groupe Special Mobile) base station system (BSS) is given and the equipment needed to support this network entity and the specification of the equipment are presented.
Abstract: A brief overview of the GSM (CEPT's Groupe Special Mobile) base station system (BSS) is given. The equipment needed to support this network entity and the specification of the equipment are presented. The use of the BSS equipment specification is described and the testing of the GSM base station systems is discussed. BSS network functions are outlined and the A-bis-interface is described. >