Google Ex. 1213, pg. 1
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`Google Ex. 1213, pg. 1
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`Stanford University L hraries
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`A 3.“ 9- Be rn ad ette PA _
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`361 05009663647
`
`Google Ex. 1213, pg. 2
`
`Google Ex. 1213, pg. 2
`
`

`

`The GSM System for
`
`Mobile Communications
`
`A comprehensive overview of the
`European Digital Cellular" Systems
`
`Google Ex. 1213, pg. 3
`
`Google Ex. 1213, pg. 3
`
`

`

`The‘ G S M
`' S ystem for
` . “ Obile
`
`
`Communications .
`
`' Michel MOULY
`'
`.
`%% 7 fl Marie-Bemadette PAUTET
`
`
`
`Google Ex. 1213, pg. 4
`
`Google Ex. 1213, pg. 4
`
`

`

`This book is published by the authors. Correspondence,,in~ particular for
`orders, but also for comments, should be mailed to; '
`"
`
`M. MOULY et Marie—B. PAUTET '
`49, rue Louise Bruneau
`F—91 120 PALAISEAU
`FRANCE
`
`'
`
`’
`
`Telephone : +33 1 69 31 03 18
`Facsimile : +33 1 69 31 03 38
`
`Copyright © 1992, Michel MOULY and Marie-Bernadette PAUTET
`
`All rights reserved. No part of this book may be reproduced, translated, or
`utilised in any form or any means, electronic or mechanical, including
`photocopying, recording, or any information storage or retrieval system,
`without permission in writing from the authors.
`
`All drawings are original, and all corresponding rights reserved.
`
`The name and logo GSM (and “Global System for Mobile
`communications”) are registered.
`
`International Standard Book Number: 2-9507190-0-7
`
`Google Ex. 1213, pg. 5
`
`Google Ex. 1213, pg. 5
`
`

`

`FOREWORD
`
`7
`
`FOREWORD
`
`by Thomas Haug,
`Farmer Chairman, ETSI ’I‘C/GSM
`
`the CEPT
`1982,
`June,
`in
`in Vienna
`its meeting
`At
`Telecommunications Commission decided to set up a group to work out
`specifications for a pan—European cellular communication system I"or the
`, 900 MHZ band which had recently been allocated to land mobile use. The
`idea behind this decision was to create for the first time a system that
`would end the traditional European fragmentation and incompatibility in
`the mobile field. It was clear to the CEPT that unless the opportunity was
`taken there and then, the 900 MHz band would rapidly be allocated for
`different and incompatible systems in different countries, and that in View
`of the difficulty of finding another commonly available band,
`the
`opportunity would then be gone for decades to create a system with pan—
`European roaming.
`
`From day one the work was directed towards a second—generation
`cellular
`system,
`since many countries already had first—generation
`systems (TACS, NMT, System C, etc.) in use or in the implementation
`stage. There was no decision or directive that the new system should be
`digital, since there was uncertainty as to what transmission mode would
`best meet the requirements. However, there was agreement that the new
`system must
`take
`into
`account
`recent
`developments
`in
`the
`telecommunication field, such as CCITT Signalling System No. 7, ISDN,
`081 and other powerful innovations. Gradually, it became clear that the
`most likely solution would be a fully digital one, provided the radio
`propagation problems could be overcome, since the digital mode would
`be far more adaptable to the needs of a modern system than the analogue
`one. The final proof of the feasibility of the digital system was given after
`a very thorough series of measurements in various countries had been
`performed, above all at CNET in Paris, and the decision for a digital
`solution could be taken. With that as a basis, the way forward to a totally
`new system, fit for the 1990s, was open.
`
`Google Ex. 1213, pg. 6
`
`Google Ex. 1213, pg. 6
`
`

`

`8
`
`THE GSM SYSTEM
`
`The work on the system was made possible by a united European
`effort, both in PTTs,
`research institutes
`and manufacturers, who
`participated from 1987 on. This kind of common effort towards a unified
`system is
`different
`from the
`earlier
`tradition
`in European
`telecommunications, where national concerns have frequently led to a
`protectionist attitude, with resulting incompatibility and poor economy.
`Also the European Community was strongly in favour of the common
`system and made a significant contribution in securing the legal basis for
`setting aside the necessary frequencies in its member states.
`
`The result of the work by the GSM (first a CEPT working group,
`later on an ETSI group, and recently renamed SMG) is available through
`ETSI in the form of some 5200 pages of technical specifications for the
`first phase of the system. The work has attracted a great deal of interest
`even outside Europe, notably in Australia and south—east Asia. In fact,
`several countries have already taken firm decisions to build GSM
`systems.
`
`For coming phases, more papers will follow in the years to come.
`Clearly,
`this huge amount of specifications is totally unreadable to
`anyone but a tiny group of specialists, just like a collection of law texts is
`incomprehensible to non—lawyers. This is inevitable, since an absolute
`requirement on a technical specification which is to be used by many
`different manufacturers, operators
`and regulatory bodies
`in many
`countries, often as a basis for legally binding contracts, is that it must be
`complete, consistent and unambiguous
`(unfortunately,
`it sometimes
`happens that this requirement is not fully met, despite all the efforts).
`Thus, the stringency requirement does not improve the legibility, and one
`may safely assume that very few people will ever master the whole set of
`specifications describing the system. At the same time, very many people
`will be involved in the implementation, procurement, operation and
`maintenance of the system, which means that they are in dire need of
`another type of description of GSM, which provides them with the
`necessary overview and a lot of details without resorting to the very
`formal description given in the specifications. This fact has been evident
`for a number of years, since the next lower level of description below the
`specification only consisted of various conference proceedings, useful in
`themselves, but in most cases very summary and usually without much
`co—ordination.
`
`Google Ex. 1213, pg. 7
`
`Google Ex. 1213, pg. 7
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`

`

`FOREWORD
`
`9
`
`To prepare a description that goes into details on virtually every
`point of the system in such a way that the interested person feels tempted
`to read more, not less, is a very difficult task, requiring experts with a
`good ability to make complicated things easy to understand in plain
`language and above all to explain how the various parts of the system,
`described
`in
`seemingly
`unrelated
`technical
`specifications,
`are
`interconnected. It is therefore extremely fortunate that the authors of this
`book, both of whom are experts in the field and have made very
`significant contributions to the GSM work, have on their own initiative
`produced a description of GSM which in my View very well Ineets the
`needs described above.
`I wish to congratulate the authors on their
`achievement and to express my thanks for the very great effort they have
`spent. 1 am sure the book will be of very great help to a large community,
`both in and outside Europe, in the years to conie.
`
`Thom as Hau g
`
`Google Ex. 1213, pg. 8
`
`Google Ex. 1213, pg. 8
`
`

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`Google Ex. 1213, pg. 9
`
`Google Ex. 1213, pg. 9
`
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