PSIST ETR 185:1998

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Digital Enhanced Cordless Telecommunications (DECT); Data Services Profile (DSP); Profile overview33.070.30'(&7Digital Enhanced Cordless Telecommunications (DECT)ICS:Ta slovenski standard je istoveten z:ETR 185 Edition 1PSIST ETR 185:1998en01-avgust-1998PSIST ETR 185:1998SLOVENSKI
STANDARD



PSIST ETR 185:1998



ETSIETR 185TECHNICALDecember 1995REPORTSource: ETSI TC-RESReference: DTR/RES-03030ICS:33.020, 33.060.50Key words:DECT, Profile, Data, LAN, WAN, PABX, Fax, ModemRadio Equipment and Systems (RES);Digital European Cordless Telecommunications (DECT);Data Services Profile (DSP);Profiles overviewETSIEuropean Telecommunications Standards InstituteETSI SecretariatPostal address: F-06921 Sophia Antipolis CEDEX - FRANCEOffice address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCEX.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: secretariat@etsi.frTel.: +33 92 94 42 00 - Fax: +33 93 65 47 16Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and theforegoing restriction extend to reproduction in all media.© European Telecommunications Standards Institute 1995. All rights reserved.PSIST ETR 185:1998



Page 2ETR 185: December 1995Whilst every care has been taken in the preparation and publication of this document, errors in content,typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to"ETSI Editing and Committee Support Dept." at the address shown on the title page.PSIST ETR 185:1998



Page 3ETR 185: December 1995ContentsForeword.51Scope.72References.73Definitions and abbreviations.83.1Definitions.83.2Abbreviations.94User scenarios.94.1Wireless private access to data networks.104.1.1Wireless Local Area Network (LAN)/Private Automatic Branch Exchange(PABX).104.1.2Roaming between wireless LANs/PABXs.114.2Wireless public access to data networks.114.2.1Initial users.114.2.2Why will the market take off?.124.3Vertical applications.134.4Residential environment.144.5Multimedia communication.144.6Security.154.7Summary.155DECT features essential to the DECT DSPs.155.1General.155.2Capacity.165.3Security.165.4Mobility.165.5Profiles.166The DECT DSPs.176.1Objective of the DECT DSPs.176.2Description of services.176.2.1Service types.176.2.2Mobility support.186.2.3Application examples.196.3Structure of the DECT DSPs.206.4The DECT DSPs - Summary.207Profile implementation.217.1Base standard (A.1 and B.1 profiles).217.2Generic Data Link Services (C.2).218Future developments.22History.23PSIST ETR 185:1998



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Page 5ETR 185: December 1995ForewordThis ETSI Technical Report (ETR) has been produced by the Radio Equipment and Systems (RES)Technical Committee of the European Telecommunications Standards Institute (ETSI).ETRs are informative documents resulting from ETSI studies which are not appropriate for EuropeanTelecommunication Standard (ETS) or Interim European Telecommunication Standard (I-ETS) status. AnETR may be used to publish material which is either of an informative nature, relating to the use or theapplication of ETSs or I-ETSs, or which is immature and not yet suitable for formal adoption as an ETS oran I-ETS.PSIST ETR 185:1998



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Page 7ETR 185: December 19951ScopeThis ETR describes the objectives, structure and content of the Digital European CordlessTelecommunications (DECT) Data Services Profiles (DSPs), which define a set of profile standards forsystems conforming to the DECT standard. They are a family of profile standards which build upon, andextend, each other, aimed at the general connection of terminals offering non-voice services betweenthemselves or to other communications network, both public and private, via a DECT Fixed Part (FP).This ETR also describes possible user scenarios in wireless mobile computing. These scenarios haveformed the guidelines of the DECT DSPs.2ReferencesFor the purposes of this ETR, the following references apply:[1]ETS 300 175-1: "Radio Equipment and Systems (RES); Digital EuropeanCordless Telecommunications (DECT); Common Interface (CI); Part 1:Overview".[2]ETS 300 175-2: "Radio Equipment and Systems (RES); Digital EuropeanCordless Telecommunications (DECT); Common Interface (CI); Part 2: Physical(PHL) layer".[3]ETS 300 175-3: "Radio Equipment and Systems (RES); Digital EuropeanCordless Telecommunications (DECT); Common Interface (CI); Part 3: MediumAccess Control (MAC) layer".[4]ETS 300 175-4: "Radio Equipment and Systems (RES); Digital EuropeanCordless Telecommunications (DECT); Common Interface (CI); Part 4: DataLink Control (DLC) layer".[5]ETS 300 175-5: "Radio Equipment and Systems (RES); Digital EuropeanCordless Telecommunications (DECT); Common Interface (CI); Part 5: Network(NWK) layer".[6]ETS 300 175-6: "Radio Equipment and Systems (RES); Digital EuropeanCordless Telecommunications (DECT); Common Interface (CI); Part 6:Identities and addressing".[7]ETS 300 175-7: "Radio Equipment and Systems (RES); Digital EuropeanCordless Telecommunications (DECT); Common Interface (CI); Part 7: Securityfeatures".[8]ETS 300 175-8: "Radio Equipment and Systems (RES); Digital EuropeanCordless Telecommunications (DECT); Common Interface (CI); Part 8: Speechcoding and transmission".[9]ETS 300 175-9: "Radio Equipment and Systems (RES); Digital EuropeanCordless Telecommunications (DECT); Common Interface (CI); Part 9: PublicAccess Profile (PAP)".[10]ETR 043: "Radio Equipment and Systems (RES); Digital European CordlessTelecommunications (DECT); Common Interface; Services and facilitiesrequirements specification".[11]ETR 056: "Radio Equipment and Systems (RES); Digital European CordlessTelecommunications (DECT); System description document".[12]ETS 300 435: "Radio Equipment and Systems (RES); Digital EuropeanCordless Telecommunications (DECT); Data Services Profile (DSP); Basestandard including inter-working to connectionless networks (service types Aand B, Class 1)".PSIST ETR 185:1998



Page 8ETR 185: December 1995[13]ETS 300 651: "Radio Equipment and Systems (RES); Digital EuropeanCordless Telecommunications (DECT); Data Services Profile (DSP); Genericdata link service; Service Type C, Class 2".[14] ETR 178: "Radio Equipment and System (RES); Digital European CordlessTelecommunications (DECT); A high level guide to the DECT standardization".[15]Arik Elberse Teltec Ireland; IEE Colloquium on Teleworking andTeleconferencing: "DECT: The Ideal Telework Access Technology", June 1994.[16]Commission of the European Communities: "Towards the PersonalCommunications Environment: GREEN PAPER on a common approach in thefield of mobile communications in the European Union.", September 1994.[17]Telecomeuropa's Personal Communications Newsletter; June 20th 1994.[18]Andrew Bud, Olivetti Systems & Networks, Italy; 5th IEE InternationalConference on Mobile Radio & Personal Communications: "Data Services inDECT", December 1989.[19]Jan Libenga, MOBILE europe March 1994, "Communicating into the Future withPDAs".[20]ETS 300 444: "Radio Equipment and Systems (RES); Digital EuropeanCordless Telecommunications (DECT); Generic Access Profile (GAP)".3Definitions and abbreviations3.1DefinitionsFor the purpose of this ETR, the following definitions apply:authentication: The process whereby a DECT subscriber is positively verified to be a legitimate user of aparticular Fixed Part (FP) and vice versa.frame relay: Transmission of an Service Data Unit (SDU) with frame boundaries maintained but withoutnotification of correct or otherwise receipt of that SDU.Fixed Part (FP): A physical grouping that contains all of the elements in the DECT network between thelocal network and the DECT air interface.interoperability: The ability of a FP from one manufacturer and a Portable Part (PP) from anothermanufacturer to communicate, exclusively by means of reliance on a common protocol profile.mobile computing: The use of portable computer type equipment in different locations.on-line media: The availability of a wide range of copyright material, such as encyclopedias, maps,directories, timetables and newspapers, to users for access via telecommunications networks.Personal Intelligent Communicator (PIC): A hand held computer, possibly with a pen based userinterface, and the ability to communicate via data networks.Portable Part (PP): A physical grouping that contains all elements between the user and the DECT airinterface. PP is a generic term that may describe one or several physical pieces.roaming: The movement of a PP from one FP coverage area to another FP coverage area, where thecapabilities of FPs enable the PP to make or receive calls in both areas.teleservices: A type of telecommunications services that provides the complete capability, includingterminal equipment functions, for communication between users, according to protocols that areestablished by agreement.PSIST ETR 185:1998



Page 9ETR 185: December 1995terminal mobility: The ability to access a set of communications services, associated with a specificterminal, in different locations.3.2AbbreviationsFor the purposes of this ETR, the following abbreviations apply:ATMAsynchronous Transfer ModeDECT CIDigital European Cordless Telecommunications Common InterfaceDSPData Services ProfileFPFixed PartGAPGeneric Access ProfileGSMGlobal System for Mobile communicationIPX/SPXInternetwork Packet Exchange/Sequenced Packet ExchangeISDNIntegrated Services Digital NetworkLANLocal Area NetworkLAPLink Access ProtocolMANMetropolitan Area NetworkPABXPrivate Automatic Branch ExchangePADPacket Assembly/DisassemblyPCMCIAPersonal Computer Memory Card International AssociationPDAPersonal Digital AssistantPICPersonal Intelligent CommunicatorPOSPoint Of SalePPPortable PartSDUService Data UnitTCP/IPTransmission Control Protocol/Internet ProtocolWANWide Area NetworkPINPersonal Identification Number4User scenariosThe rapid evolution in mobile computing is one of the key trends in the development of the informationsociety. Today more laptop computers than desktop computers are sold. In addition the market forPersonal Intelligent Communicators (PICs) is predicted to be on the verge of mass-market takeoff. Somemarket analysts estimate that more than 100 million personal communicators will be sold by theyear 2 000 (see Libenga [19]).A major trend towards multimedia communications can also be seen. The number of users of variouson-line services is increasing dramatically every day. There are over 20 million subscribers to the Internet,and new commercial services appear frequently. New software for teleconferencing and teleworking iscontinuously being developed.The result of these two trends will be an exploding demand for systems and networks which permit usersof mobile computers to communicate on the move, and, therefore, without wires. Such a possibility willtransform the mobile computer and the PIC into terminals for telecommunications services thusenhancing their role as personal productivity tools. This will create opportunities for many new applicationsand services, in areas such as on-line media and business process re-engineering.From this perspective, standards for wireless multi-media communications are urgent requirements toexpand the market, reduce costs and permit the establishment of wireless networks.The following subclauses describes user scenarios related to wireless data communication. The purposeof these subclauses is to give a background for user requirements and an introduction to the services andfacilities that the DECT DSPs are aiming to support.PSIST ETR 185:1998



Page 10ETR 185: December 19954.1Wireless private access to data networks4.1.1Wireless Local Area Network (LAN)/Private Automatic Branch Exchange (PABX)A wireless LAN can extend or even substitute for a standard wired LAN. The wireless LAN will function asa wired LAN does, using the same network protocols as wired LANs today (e.g. TCP/IP, IPX/SPX). Theusers of wireless LANs can be organizations which:-need local terminal mobility;-need to be flexible in re-configuring their LAN;-require a temporary LAN;-are situated in buildings where the installation of extra cabling is costly, disruptive or forbidden(such as historic buildings or those containing asbestos).Relevant applications will include those running on most LANs today (such as MS-OfficeÔ,Word PerfectÔ and Lotus NotesÔ) and new applications specially designed for mobile terminals. Thenew opportunities offered by cordless terminal mobility will create brand new markets for informationtechnology.In cases where terminal mobility is needed, the communications hardware for wireless access to a LAN orPABX has to be small enough to allow portable terminals (e.g. laptop computers) to be used withoutadding excessive weight or volume.It is extremely important that the wireless LAN is at least as dependable as a wired LAN. The reason forthis is the dependency placed on LANs to work without failure in modern businesses. This means that thewireless LAN has to give the user a very high degree of confidence that it will avoid corruption of data anddeliver a minimum level of throughput in all places where coverage is defined.The addition of data services to a wireless PABX can offer value added services with very little additionalcomplexity and can use the same installed set of base stations that already provide speech services. Inparticular, services such as fax and access to files stored on a LAN can be provided. There is also thepossibility of adding new cordless services such as cordless data entry and inventory control.An infrastructure that can offer both wireless speech and data services over the same infrastructure willoffer extremely flexible and cost effective solutions to users for whom staff mobility is a requirement.Figure 1: Wireless speech and data services over the same infrastructurePSIST ETR 185:1998



Page 11ETR 185: December 19954.1.2Roaming between wireless LANs/PABXsAnother important scenario is when roaming between networks such as LANs or PABXs is needed, theuser is allowed to continue to use his network identity or "address" when moving between differentnetworks. For instance, this would make it possible for an employee of a large company to travel from themain office to a branch office, still being connected via the local networks to his/her home networks,receiving electronic mail and retrieving documents from his or her home server. In this scenario, additionalfunctions such as roaming and authentication procedures, have to be supported by the wireless networks.The scope of the mobility offered to the user is increased in this scenario. Therefore, applications whichare specially designed for mobile terminals will be able to offer even greater added value than in thescenario in subclause 4.1.1.Roaming between wireless LANs/PABXs allows users' speech and data services to be available andautomatically re-routed to them as they move between different LAN/PABX sites either within onecompany or between several companies. This can make possible enormous cost savings to userorganizations as the productivity of their employees is increased.4.2Wireless public access to data networksWhen a user becomes accustomed to the idea of terminal mobility, there will be a natural wish to extendthis mobility. "Since I have coverage at work, I would also like to have access at the airport, hotel,conference center, at home,.".To meet this demand, new public access networks may be created to provide multi-media wirelesscommunications to mobile computers and PICs in key locations. Such an access service, referred to as"Datapoint", will not only give users access to existing network services, but will also probably give rise tothe creation of new network services. These will be specifically targeted at the Datapoint user, providinginformation about local geography, support services, accommodation, transport connections andentertainment.In addition, the interesting difference from a market point of view between this scenario and the two insubclause 4.1, is that the number of users could grow towards a mass market, including public andresidential users.To facilitate this migration towards public access, it is important that the communications adapter used ina wireless LAN also functions in a public access environment without hardware modifications.Furthermore, in a public environment inter-operability between equipment from different manufacturers willbe essential.4.2.1Initial usersThe initial users of a public service would probably be white collar workers, including executives and salespeople, who travel a lot and need to stay in touch with their home office. In general, they will need accessto a particular set of services, which is often referred to as a “mobile office”. Some relevant applicationsare listed in figure 2.PSIST ETR 185:1998



Page 12ETR 185: December 1995Figure 2: Applications in a system for wireless public access to data networksThese applications illustrate the trend towards higher throughput demands on the communications link.This trend has been very clear in the data communications world for several years, where ever fastervoice-band modems have become available. Consequently, even an e-mail application might demand thelevel of throughput available from the Integrated Services Digital Network (ISDN), if the message sentincludes a picture or even a video sequence.This means that in planning for the future, a system for wireless public access to data networks may needto support throughputs comparable to those of basic rate ISDN.4.2.2Why will the market take off?As has already been stated, the first users of wireless public access to data networks will probably be thebusiness and professional community.A comparison may be made with the development of the mobile telephony market. In early June 1994 thetotal number of subscribers using Nordic Mobile Telephone (NMT) handsets exceeded 2,5 million. Whenthe technology was first proposed in the 1970’s the estimated numbers of users by the end of the centurywas around 100 000 newsletter [17]. Initially, the cellular telephone systems were aimed strictly at thebusiness community. Today, these systems are in everyday use among the general public. A similarhistory exists for the personal computer.Factors contributing to similar growth in the market for wireless public access to data networks, a logicalextension of the existing wireless telephony markets described above, include the increasing number ofportable computers sold in the consumer market and the rapid expansion in the on-line media sector. Ofcourse, this would demand a much wider geographical coverage, including city centers and other areaswhere people might want to access data networks, such as airports, stations, conference centers, hotelsand shopping centers. It would also demand new applications, to enable customers to gain the full benefitfrom the service. Such applications would be tailor-made for mobile access to on-line media, but couldalso extend to other sectors of potential use, such as teleworking (an example of this application is givenin Elberse [15]).PSIST ETR 185:1998



Page 13ETR 185: December 1995Figure 3: The evolution towards wireless public access to data networks4.3Vertical applicationsA number of specific applications environments ("vertical applications") could gain particular benefit fromwireless data communications, by virtue of their special operational needs. Examples include the industrialand medical sectors.PSIST ETR 185:1998



Page 14ETR 185: December 1995Industrial environments are envisaged as an area with a huge potential for wireless data communications,since mobility, flexibility and seamless reconfiguration of the production line is required. Four main areasfor wireless data communications in industrial environments are foreseen:-as part of the logistics in stock control and warehouses;-as the communication part of the production line;-as support for the maintenance and management functions;-to provide wireless surveillance.The usage of wireless data communications in stock warehouses has already been shown as a marketthat is expanding. The main reason is the mobility made possible by wireless data communications. Usingwireless data communications together with bar code readers and pen based computers makes dataacquisition more efficient and inventory control more reliable.The increasing demand on manufacturing efficiency makes the ability to quickly rearrange the productionline a necessity. Furthermore, as manufacturing is being more computerized, the provision of a wirelessdata communications standard provides the tools for this flexibility.The operation of modern factories also requires that staff move around and are available where they areneeded for management or maintenance tasks, and yet have access to all the available informationregarding a given problem. Wireless data networks can provide the support necessary to improve theproductivity of such personnel.Wireless surveillance could include alarm acquisition from environmental equipment or picturetransmission from cameras which are surveilling factories.Hospitals are another example of an environment in which staff are highly mobile, and yet can gainenormous benefit from instant access to information data-bases. Such information may include patientrecords, drug data-bases or instrument logs. Wireless access to such data can save great amounts oftime wasted on fetching information.Conversely, the efficiency of a hospital can be greatly improved if doctors' notes, prescriptions andannotations can be integrated into the hospital information system immediately, without delay oradministrative overhead, directly from the bedside. The use of PICs equipped with wireless datacommunications have been shown to be highly effective in this context.4.4Residential environmentThe usage of wireless data communications in private homes, is expected to be a spin off from the use ofsmall wireless PABXs for telephony. When the market for small PABXs takes off, prices will drop as aresult of the increasing competition. In order to gain market share the manufactures will look for ways todifferentiate their products. One way is to add new features like wireless modem, fax and/or LANinterworking. With a common standard these extra facilities will be relatively easy to implement. Users'increasing familiarity with wireless networks, first encountered in a professional or public environment,may also contribute to the growth of demand in the residential context.With the penetration of personal computers and computer-based products in private homes, the ability tointerconnect them into networks will be crucial.The provision of a common standard that caters for both the business and private market segments willeventually benefit the total market. The prices for wireless data communications adapters is foreseen toevolve in the same way as for wired LAN adapters, modems, mobile phones and faxes.4.5Multimedia communication"Tomorrow’s communicator will integrate the features of telephone, agenda and organizer, combined withPC functions." This is a quote from the European Commission's Green Paper on mobile communications[16], which stresses that the range of personal communicators of the future will include multimediaterminals with modest communications requirements.PSIST ETR 185:1998



Page 15ETR 185: December 1995The Green Paper continues "Industry has already introduced very small PCs ("palm-tops"). Ultimatelythese devices are likely to integrate all features that modern telephony offers. This will include video-phone and fax features, as well as the possibility to "plug" into office or private computers. They willintegrate multimedia and telecommunications applications", a scenario which will demand ISDN-likethroughput if video-telephony is to be supported.4.6SecuritySecurity will be a major issue when wireless access is applied to data networks. A company installing awireless LAN will demand wireless access to be comparable to wired access with respect to avoidingunauthorized access and eavesdropping.Security will also be crucial in a public access environment if public confidence is to be maintained.The various elements of this topic are summarized in the Green Paper "With regard to mobile andpersonal communications systems, major issues are also raised, inter alia, by encryption, authentication,prevention of fraud, protection of network management, data bases, and service providers."4.7SummaryThis subclause lists some requirements for wireless access to data networks. Not all of theserequirements must necessarily be met for a wireless data network to be able to function in a givenenvironment. Nevertheless the more of these requirements can be met, the more versatile and acceptablethe wireless network will be.The requirements are:1)a reliable system that will keep on functioning even under severe conditions;2)very strong security features to avoid unauthorized access and eavesdropping;3)mobility support to cater for terminal mobility in public and private environments;4)throughput high enough to support relevant applications;5)the ability to support multimedia, in particular voice and data, using the same infrastructure;6)interoperability between equipment from different manufacturers;7)small and light user kit;8)the ability to use equipment designed for private use in a public environment without hardwaremodifications.In the remainder of this ETR it will be shown how DECT can meet these requirements.5DECT features essential to the DECT DSPsThis clause describes some features of the DECT standard that are important for the data servicesoutlined in clause 4.5.1GeneralThe DECT standard was developed by ETSI for a wide range of high-density cordless applications, bo
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