1、 STD-ITU-R RECMN M-8Lb-L-ENGL 1997 4855232 0532205 O70 Rec. ITU-R M.816-1 103 RECOMMENDATION ITU-R M.816-1 FRAMEWORK FOR SERVICES SUPPORTED ON INTERNATIONAL MOBILE TELECOMMUNICATIONS-2000 (IMT-2000) (Question ITU-R 39/8) ( 1992- 1997) 1 Introduction International Mobile Telecommunications-2000 (IMT-
2、2000) are third generation mobile systems which are scheduled to start service around the year 2000 subject to market considerations. They will provide access, by means of one or more radio links, to a wide range of telecommunication services supported by the fixed telecommunication networks (e.g. p
3、ublic switched telephone networkhntegrated services digital network (PSTN/ISDN), and to other services which are specific to mobile users. A range of mobile terminal types is encompassed, linking to terrestrial or satellite based networks, and the terminals may be designed for mobile or fixed use. K
4、ey features of IMT-2000 are: - - - - high service quality; - IMT-2000 are defined by a set of interdependent IT-R Recommendations of which this one on services is a member. This Recommendation forms a framework for continued development towards detailed IMT-2000 service descriptions such as ITU-T Re
5、commendation F.115. A goal for third generation mobile systems is to provide universal coverage and to enable terminals to be capable of seamless roaming between multiple networks. The users application will need to negotiate to establish a communication path having the required characteristics of b
6、andwidth, delay and quality, recognising that many multimedia communications will be highly asymmetric. The need to provide for future non-standardized services, which can be created independently in a competitive, multi-operator environment places radically new requirements on the radio interface c
7、oncept. No longer will the various elements of the radio interface (e.g. channel coder, modulator, transcoder, etc.) have fixed parameters, rather, they would be in the form of a “toolbox“ whereby the key parameters of bandwidth, transmission quality and delay can be selected, negotiated, mixed and
8、matched by the requirements of the teleservice, according to the instantaneous capability of the radio channel. incorporation of a variety of systems; high degree of commonality of design worldwide; compatibility of services within IMT-2000 and with the fixed networks; use of a small pocket terminal
9、 worldwide. 2 Scope A phased approach is adopted for the definition of IMT-2000. In this Recommendation the services required for Phase 1 are described, and an outline of the services for Phase 2 is also given. Phase 1 includes those services supported by user bit rates up to approximately 2 Mbit/s.
10、 Phase 2 is envisaged as augmenting Phase 1 with new services, some of which may require higher bit rates. * This Recommendation should be brought to the attention of the Telecommunication Standardization Sector. COPYRIGHT International Telecommunications Union/ITU RadiocommunicationsLicensed by Inf
11、ormation Handling ServicesSTD=ITU-R RECMN M-BLb-L-ENGL 1997 485521i2 053220b TO7 104 Rec. ITU-R M.816-1 3 Considerations The IT-R considers that IMT-2000 will operate in a complex environment which requires recognition of the following factors : - the involvement of a number of commercial interests
12、(such as service providers, re-sellers, network operators, value-added service suppliers, etc.); - the possible involvement of, or the cascading of, networks which may be of different types; - increasing technical developments and opportunities; - the changing regulatory framework for those involved
13、 in supplying services (e.g. competition for users and customers, and deregulation in various forms by administrations); - the needs of many users for services which are not bounded by constraints of geography or operator; - that the mobile user of the services may be a persodpersons or a machine. T
14、hat these users could have different service requirements by virtue of either the desires of the user or the economics of providing for that service to the users mode of mobility; - that service availability will be dependant on a number of factors which could include: mobile terminal type, speed of
15、 motion, and geographic factors; for example hand portable sizedvehicle mounted terminals, indoor/outdoor, residential or business areas, urbadsuburbadrural areas etc.; - that it is to be expected that the number and content of the service offerings will change with time, and will not be the same in
16、 every location; - the increasing importance of the various types of non-voice telecommunication services; - that mobile terminals of IMT-2OOO may be used to access mobile satellite systems for use on land, ships and aircraft; - that there is a need for mobile terminals to roam between public land m
17、obile telecommunication networks in different countries and between networks in the same country; - that a standardized radio interface would facilitate the roaming of mobile terminals between networks; - that users may want to be able to use the same terminal equipment and procedures as in the fixe
18、d networks to access similar telecommunications services in IMT-2000; - that there is a need to provide for fixed wireless access services particularly in developing countries. 4 General service objectives and requirements 4.1 Structure The service recommendations for IMT-2000 are achieved in three
19、stages. The first gives general objectives and requirements. This provides an outline description of the services offered and can be used to provide a framework within which the services are defined. These objectives are given in this section. The second stage lists, in descriptive form, the detaile
20、d services offered on IMT-2000. These are given in $ 7, 8 and 9 of this Recommendation. Third stage descriptions involve more quantitative definitions and also involve definitions produced by non-IT-R bodies (IT-T, etc.). The IT-R recommends that the services supported by IMT-2000 be in compliance w
21、ith the following general objectives and requirements: COPYRIGHT International Telecommunications Union/ITU RadiocommunicationsLicensed by Information Handling ServicesSTDmITU-R RECMN H*BLb-L-ENGL 1797 4855212 0532207 743 W Rec. ITU-R M.816-1 105 4.2 General service objectives - To provide a capabil
22、ity that enables existing as well as new audio, video, data and multimedia services, which are significantly more advanced than pre-IMT-2000 technologies. Both packet and circuit switched and connection oriented and connectionless services are envisaged; To provide flexible radio bearer services; To
23、 provide capability for bandwidth-on-demand supporting a wide range of data rates, from simple low-rate paging messages, voice, to significantly higher rates associated with video or file transfer; To support asymmetrical data capabilities, which require high rates in one direction but much lower ra
24、tes in the other; To provide a wide range of telecommunications services to mobile or fixed users by means of one or more radio links; To ensure that the services provided by IMT-2000 should, as far as possible, be identical to those offered to users of fixed telecommunications terminals (connected
25、to fixed telecommunication networks) and with a comparable quality of service; To provide a robust signalling interface that is required to support those services not dependent upon a bearer capability; To make these services available for mobile terminals located anywhere subject only to constraint
26、s of economic provision, and to limitations of implementation timing; To provide for flexibility of service provision, for example, between mobile terminal categories and on a geographical or user density basis; To ensure that the user of the personal station, when roaming between networks, should h
27、ave available (provided the personal station has the necessary capabilities): - an indication of the service availability; - access to voice telephony; - - To provide for services subject to mobile terminal type, location, and availability from the network operator; To provide for worldwide roaming.
28、 - - - - - - - - - Universal Personal Telecommunication (UPT), and access to a selection of data services; - - 4.3 Requirements on Service Creation IMT-2000 services are provided for the mass market but should be offered in a flexible way so that individual requirements can be met. This requires fle
29、xible service creation instead of rigidly specified individual services. Support for intersystem roaming will require access to, and invocation of, the users personalized services where these services are supported by the concerned radio operating environment and access system. 4.4 General service r
30、equirements - To provide validation and authentication procedures to facilitate billing and accounting (see ITU-T Recommendation X.509); to provide for additional levels of security for telecommunication services; to provide privacy of location of a roaming user when desired by the called or calling
31、 party. - - 4.5 General access requirements - For access to the fuced networks: IMT-2000 may be either an adjunct to or an integral part of the PSTNfiSDN. Services offered in the PSTNfiSDN should, as far as possible, be offered to IMT-2000 users; for international operation: IMT-2000 should allow in
32、ternational operation and automatic roaming of mobile users and stations to the extent practical or permitted; - COPYRIGHT International Telecommunications Union/ITU RadiocommunicationsLicensed by Information Handling ServicesSTD-ITU-R RECMN N-BLb-L-ENGL 3997 m 4855232 0532208 88T m 106 Rec. ITU-R M
33、.816-1 - for maritime and aeronautical: IMT-2000 should allow operation in the maritime and aeronautical environment to the extent permitted by national and international regulatory authorities; - for satellite systems: IMT-2000 should allow operation either directly or indirectly via satellite. 4.6
34、 Quality of service requirements Quality of service is the subject of separate Recommendations, ITU-R M. 1079 related to speech and voiceband data performance requirements and IT-T G. 174 (Transmission Performance Objectives for Terrestrial Digital Wireless Systems Using Portable Terminals to Access
35、 the PSTN) which give the detailed requirements. The quality of services offered over IMT-2000 should be closely comparable to the quality of the same services achieved when using the contemporary fixed networks (e.g. PSTNASDN) alone. 4.7 Support of User Identity Module (VIM) functionality Originati
36、ng and terminating calls should require a UIM as a physical device or as a functionality to be present in the mobile terminal, subject to legal constraints concerning the requirement for UIM functionality in order to place an emergency call. The capability to record user and terminal identities shou
37、ld be provided. Whether such recording capability is actually used and the information provided to emergency service authorities is subject to national regulations. 5 UPT UPT is a service which allows a user to access any suitably equipped terminai and obtain from it a range of telecommunications se
38、rvices which are specific to the user requirements. UPT provides personal mobility as opposed to terminal mobility provided by IMT-2000. UPT is defined in IT-T Recommendation F.851. The IT-R recommends that IMT-2000 have the objective of supporting UPT and maintaining UPTs common presentation to use
39、rs. It should be noted that the details of UPT, and the implications for IMT-2000, are dependant on the work currently being performed by the IT-T on the subject. 6 Support of fixed network services IMT-2000 will interwork or be integrated with fixed networks such as PSTN, ISDN, B-ISDN and others. 6
40、.1 PSTN IMT-2000 should support PSTN services. 6.2 ISDN The ISDN is a fixed network which provides digital highways, digital signalling channel(s), and associated services to users terminals. ISDN is defined in the ITU-T I-Series of Recommendations. IMT-2000 will operate in an era when ISDN will be
41、widely available; ISDN will provide users with high quality speech and data connections and se - messaging services offer user-to-user communication between individual users via storage units with store-and-forward, mailbox and/or message handling (e.g. information editing, processing and conversion
42、) functions; - the retrieval and storage services can retrieve and/or store information in information centres. 7.3 Distribution services Distribution services provide a continuous flow of information which is distributed from a central source to an unlimited number of authorized receivers connected
43、 to the network. They include broadcast services. The user may or may not be able to control the presentation and the information may be broadcast to all receivers or addressed to one or more specific receivers. 8 Recommendations on IMT-2000 telecommunication services The IT-R recommends that the se
44、t of bearer services supported by IMT-2000 should be selected from the services listed below, which require a specific bearer capability to meet the requirements of the ITU-T defined services. In addition, the ITU-R recommepds that a high quality, reliable, robust signalling interface within IMT-200
45、0 and between IMT-2000 and fixed networks such as PSTN, ISDN, B-ISDN and others be incorporated into the overall IMT-2000 design. This will ensure that the large majority of services which do not require a unique bearer capability, but rely on signalling, can be provided. 8.1 Network services The fo
46、llowing matrix identifies the telecommunication services to be provided by IMT-2000, the type of service and the bearer bit rate required. COPYRIGHT International Telecommunications Union/ITU RadiocommunicationsLicensed by Information Handling ServicesSTD-ITU-R RECMN M-8Lb-1-ENGL 1997 = 4855212 0532
47、210 438 108 Rec. ITU-R M.816-1 TABLE 1 ITU-T Recommendation Title of the User Service support Recommendation IMT-2Ooo initial B-ISDN bearer service category A A Bit rate required 14 400 bis 64 kbis F.812 Broadband connectionless data Yes None bearer service F.Pag International paging service Yes E.1
48、05 International telephone service Yes Speech 1.231 series Circuit-mode bearer service Yes All categories 1.232 series Packet mode bearer service Yes All categories 1.240 series Tele-Services supported by ISDN Yes - 1.241.7 Telephony 7 kHz tele-service Yes - A+B+C Basic bearer service specification
49、bearer service specification Very low per user D Basic A() 64 kbit/s(l) A I2 Mbit/d2) B+C+D I2 Mbis A+B (3) A 64 kbit/d2) Telecommunication services versus required bearer services in IMT-2000 Service support RNIS associ F. 182 Operational provisions for the international public facsimile service between subscribers with Group 3 facsimile terminals (Telefax 3) Yes Speech Operational provisions for the intemational public facsimile service between subscriber stations with group 4 facsimile machines Yes Unrestricted digital data F. 184 Unrestricted digital data A
