If you are struggling to find your way through the ATM jungle, this book will help you find your way without getting lost in specialized technical detail. This third edition of ATM Networks reflects the accelerated development of recent ATM specifications and provides a comprehensive overview of all the current trends. This book gives a thorough introduction to the whole technical concept of ATM, from architecture and functions to networking techniques and performance issues, as laid down in various specifications from the ATM Forum and the ITU. It explains the rationale for introducing ATM networking into your organization, and illustrates its potential in terms of the applications and services that ATM networks can offer. This third edition has been completely revised and expanded to cover: recently defined ATM interfaces such as UTOPIA, WIRE, FUNI, IMA and the protocols P-NNI, B-ICI and AIN LAN emulation and Multi-Protocol Over ATM (MPOA Internet support by ATM network voice and telephony over ATM wireless ATM and mobile AT security in ATM networks Whether you are a professional engineer involved in the planning, development or implementation of telecommunication networks or a student of electrical engineering or computer science, this revised and thoroughly updated edition of ATM Networks will provide you with a comprehensive overview of all the latest ATM technology.
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ATM is commonplace now, isn't it? Even in ordinary newspapers the term ATM can be found now and then, mostly in the context of the 'information society' and its need for powerful and efficient data highways.
So all's well that ends well? Despite the tremendous developments in terms of ATM standardization, product roll-outs, network implementations and, last but not least, public service offerings, the big commercial success of ATM is still missing. Many analysts agree that ATM has a big future, but it is a future that still has to be realized.
The ATM story so far has not been straightforward: originally invented by researchers as a hybrid switching technique combining the merits of channel and packet-switching and (at least in Europe) optimized for real-time applications such as telephony, its success started only after the data transmission experts had had a closer look at the new network transfer (that is, switching and transmission) method and decided that after some modifications and adaptations to the data world's needs it would be a concept promising enough to follow. This approach first led to the well-known 53-byte ATM cell size compromise and then to a lot of other measures to define a standard which reconciles the data community with the telecommunications community.
'Most service providers, equipment vendors, and industry analysts agree that ATM is the technology of the future, unfortunately it is a future that is yet to arrive' (Broadband Networking News, 21 January 1997). In 1996, ATM equipment sales represented more than 90% of total ATM market revenue, and this tendency will last for some years to come according to market forecasts. This clearly indicates that ATM is still in its implementation phase, and the time for ATM service revenue will only come after 2000.
ATM networks are true multi-service networks with the potential to offer broadband services; they support network consolidation and ATM has the capability to meet different quality of service requirements. ATM network infrastructure is appealing for both private and public operators even if the market for native ATM services may be limited for a while:
Corporate networks will be increasingly based on ATM as it is a 'key technology to reduce the overall cost of ownership of an enterprise ... ATM's most important strengths are QoS and ABR services' (Gartner Group presentation at ATM-F TC Meeting, Vancouver, December 1996)
Public ATM network implementations will mainly be used as broadband backbone networks to support: IP traffic transit telephony traffic leasedlines ATM native traffic others (for example, frame relay, SMDS).
A common network infrastructure for the provision of multiple services is a very cost-effective solution, it especially assists in traffic consolidation by allowing optimum usage of transmission facilities.
These ATM backbones will be based on SDH/SONET transport systems, ATM nodes and IP routers. Optimization of connectionless service support and, at the same time, provision of native (connectionoriented) ATM may lead to two distinct subnetworks based on a unique ATM technique.
Currently ATM technology succeeds mainly in backbone networks which require more and more bandwidth; however, genuine ATM to the desktop is still a rare bird. Nevertheless the ATM Forum is pushing ahead towards specification of multimedia applications including voice to the desktop, assuming that in the near or medium term bit rates of some 10 Mbit/s provided via ATM interfaces will be used by personal computers or workstations. In wide area networks, ATM-based backbone infrastructure is being deployed in corporate networks and in public networks where customers can either lease a (virtual) permanent line or demand a switched (virtual) connection - the latter deemed the most cost-effective solution in the future and therefore favored especially by network operators.
ATM and the Internet: the two may well liaise to their mutual benefit. ATM can provide the reliable and efficient network infrastructure that the Internet badly needs to become a commercially usable network which really can satisfy the needs of its users in terms of availability, throughput and other performance parameters, security and privacy, and accountability. ATM network providers may draw from the Internet's globally established user base and know-how concerning 'real-life' applications. Internet applications would then generate huge amounts of traffic which large ATM networks can handle, and which per se justify large-scale ATM implementations. So one can expect that a next-generation Internet offering advanced multimedia capabilities and better supporting real-time services may boost ATM deployment.
This third edition of ATM Networks - Concepts, Protocols, Applications is a completely revised and enlarged version of our book on ATM networking. The following new items have been included in the third edition:
Recently defined ATM interfaces (such as UTOPIA, WIRE, FUNI, IMA) and protocols (P-NNI, B-ICI, AINI) New AAL type 2 LAN emulation and Multi-Protocol Over ATM (MPOA) Internet supported by ATM networks Service classes, quality of service definitions, and traffic management for variable bit rate services (statistical multiplexing) Voice and telephony over ATM Wireless ATM and mobile ATM Residential broadband solutions Security in ATM networks ATM Application Programming Interface (API).
The host of recently defined new standards and specifications and the current focus of ATM developments forced us to concentrate on key issues, to give sometimes short overviews rather than detailed technical descriptions, and to restructure the book in some parts. We think this will assist the reader in finding his/her path through the ATM jungle. Information on where to find the complete up-to-date version of a standard specification is provided, as was the case with former editions. A brief glossary illustrating the key terms of ATM or ATM-related topics has been added, and we also provide the reader with checking questions relating to the ATM networking techniques described. R. Händel
M. N. Huber
October 1997 0201178176P04062001
Rainer Händel is with the Public Communication Networks Group of Siemens in Munich, where he has been active in technical planning and standardization of ATM for many years. The author's education in ATM matters has also been fostered by his manifold activities in international standardization bodies (ITU-T, ETSI, TI), the ATM forum and RACE projects.
Manfred Huber is with the Public Communication Networks Group of Siemens in Munich, where he has been active in technical planning and standardization of ATM for many years. The author's education in ATM matters has also been fostered by his manifold activities in international standardization bodies (ITU-T, ETSI, TI), the ATM forum and RACE projects.
Stefan Schröder is with the Public Communication Networks Group of Siemens in Munich, where he has been active in technical planning and standardization of ATM for many years. The author's education in ATM matters has also been fostered by his manifold activities in international standardization bodies (ITU-T, ETSI, TI), the ATM forum and RACE projects.
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