1、= 3404583 0078633 142 Released: July 1, 1993 GSM 03.43 Version: 4. i .I Date: April, 1993 Key words: Work Item No: European digital cellular telecommunication system (phase 2); Support of Videotex ETS I European Telecommunications Standards Institute ETSI Secretariat: Route des Lucioles, F-O6921 Sop
2、hia Antipolis Cedex . France TP. + 33 92 94 42 O0 TF. + 33 93 65 47 16 Tx. 47 O0 40 F This is an unpublished work the copyright in which vests in the European Telecommunications Standards Institute. All rights reserved. The information contained herein is the property of ETSI and no part may be repr
3、oduced or used except as authorised by contract or other written permission. The copyright and the foregoing restriction on reproduction and use extend to all media in which the information may be embodied. GSM 03.43 - version 4.1.1 - page 1 ETS I / SMG Issued by: ETSI PT12 Date: April 1993 ReRort :
4、 GSM 03.43 Title: SUPPORT OF VIDEOTEX List of contents: O. Scope 1. References 2. Definitions and Abbreviations 3. Service definition 4. Network architecture 5. Reference configuration of the mobile station 6. Bearer Service configuration and settings Orisinal Lansuase: English Number of isaaes: 11
5、Previous page is blank 3404583 0078635 TL5 GSM 03.43 - version 4.1.1 - page 2 O. SCOPE This Report describes the support of Videotex service within the GSM PLMN network, taking into account the service definition as per CCITT Rec. F.300 and Bearer Services specified in TS GSM 02.02 for a GSM PLMN. 1
6、 References This technical report incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any o
7、f these publications apply to this specification only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. ETS 300 072 ETS 300 073 ETS 300 075 ETS 300 079 ETS 300 080 ETS 300 218 ETS 300 221 ETC 300 222 ETS 300 223 TS GSM
8、 01.04 TS GSM 02.02 TS GSM 03.10 TS GSM 03.70 TS GSM 04.21 TS GSM 04.22 TS GSM 07.01 TS GSM 07.02 TS GSM 07.03 TS GSM 08.20 TS GSM 09.05 TS GSM 09.06 TS GSM 09.07 Terminal Equipment (TE); Videotex presentation layer protocol, Videotex presentation layer data syntax Videotex presentation layer data s
9、yntax; Geometric Display Terminal Equipment (TE); Videotex processable data Integrated Services Digital Network (ISDN); Syntax Based Videotex, End-to-end protocols circuit mode Integrated Services Digital Network (ISDN); Lower layer protocols for telematic terminals Integrated Services Digital Netwo
10、rk (ISDN); Syntax Based Videotex lower layer protocols using packet mode (X.31 case A and case B) Terminal Equipment (TE) ; Syntax Based Videotex lower layer protocols using packet mode access over the Public Switched Telephone Network (PSTN) Framework of Videotex Terminal Protocols Terminal Equipme
11、nt (TE) ; Syntax Based Videotex, end- to-end protocols Vocabulary in a GSM PLMN Beare Services supported by a GSM PLMN GSM PLMN Connection Types Routing of calls to/from PDNs Rate Adaption on MS-BSS Interface Radio Link Protocol for data and telematic services on the MS-BSS and the BSS-MSC interface
12、 General on Terminal Adaption Functions for MSs Terminal Adaption Functions for Services using Asynchronous Bearer capabilities Terminal Adaption Functions for Services using Synchronous Bearer capabilities rate Adaption on the BSS-MSC Interface Interworking between the PLMN and the PSPDN for PAD ac
13、cess. Interworking between a PLMN and a PSPDN/ISDN for support of mode Switched Data Transmission Services General requirements on Interworking between the PLMN and the ISDN or PSTN DTE-DTE 340Y583 0078636 951 GSM 03.43 - version 4.1.1 - page 3 CCITT Rec. E. 163 Numbering plan for the international
14、telephone CCITT Rec.E.164 Numbering plan for the ISDN era CCITT Rec.F.300 Videotex Service CCITT Rec.X.25 Interface between data terminal equipment (DTE) and data circuit terminating equipment (DCE) for terminals operating in the packet mode and connected to public data networks by dedicated circuit
15、 CCITT Rec.X.31 Support of packet mode terminal equipment by an ISDN CCITT Rec.X.32 Interface between data terminal equipment (DTE) and data circuit terminating equipment (DCE) for terminals operating in the packet mode and accessing a packet switched public data network through a public switched te
16、lephone network or an integrated services digital network or a circuit switched public data network Packet switched signalling system between public networks providing data transmission services. service CCITT Rec.X.75 2 Definitions and abbreviations For the purpose of this standard the following ab
17、breviations apply, beside the ones enlisted in TS GSM 01.04. AU BC BC-IE BS HLC LLC MTO MT1 MT2 PAD PH QOS SBVT TAF UD1 VAP vsc VTX host Access Unit Bearer Capability Bearer Capability Information Element Bearer Service High Layer Compatibility Low Layer Compatibility interface interface interface P
18、acket Assembly/Disassembly Packet Handler Quality Of Service Syntax Based Videotex Terminal Terminal Adaption Function Unrestricted Digital Information transfer capability Videotex Access Point Videotex Service Centre The computer dedicated to Videotex service Mobile Termination with no support for
19、terminal Mobile Termination with support for C-type terminal Mobile Termination with support for R-type terminal = 3404583 O078637 898 . GSM 03.43 - version 4.1.1 - page 4 3. SERVICE DEFINITION The Videotex service is proper access points access to data base an interactive service that by means and
20、standardized procedures provide information stored in host comput of the ers external to the PLMN, via public telecommunication networks. The basic elements considered for a Videotex system are: - the user terminal - the telecommunication network - the Videotex host computer or Videotex service acce
21、ss function (PAD/VAP/VSC) The specific features that are relevant to the service are: - a Videotex call is usually a mobile originated call, but mobile terminated call are supported as well; I - it is an interactive service; - the requested information is generally in form of text and/or pictures; -
22、 the information access is under the control of the user; - there are different Videotex syntax Standards, depending on high layer attributes of the service, as specified in ETC 300 072 (Profile 1, Profile 2, Profile 3, Profile 4, “ASCII“), ETS 300 073 (Geometric Display), ETC 300 075 (Processable D
23、ata), ETS 300 177 (Photographic Syntax). Common end-to-end protocols for syntax-based Videotex are specified in ETS 300 223 and ETC 300 079. 3.1 Videotex service in the GSM context Fig.1 shows the basic concept underlying all the GSM Bearer Services, as defined in TS GSM 02.02. The most general case
24、 is the GSM PLMN interworking with a Transit Network (PSTN and/or ISDN, none), interconnected to a Terminating Network (PSPDN, PSTN and/or ISDN). 3404583 0078638 724 GSM 03.43 - version 4.1.1 - page 5 Fig. 1/03.43 GSM Bearer Service scheme As the information transfer mode attribute on the PLMN is al
25、ways “Circuit“, and the information transfer capability is always “UDI“ , the end-to-end Bearer Service attributes depend mainly on the combination of Transit/Terminating networks utilized in the overall connection. This means that both “circuit mode“ and “packet mode“ bearer services are appropriat
26、e for Videotex on a GSM PLMN; in particular (see Table 4/GSM 02.02): - BS 21 to BS 26, covering rates up to 9600 bit/s; - BS 41 to BS 44 covering to 9600 bi.t/s; - BS 31 to BS 34, covering rates ip tt:! 9600 bit/s; - BS 51 Lo 53 53, covering to 9600 bit/s; data circuit duplex asynchrcnous PAD access
27、 asynchronous rates up data circuit duplex synchronous packet mode synchronous rates up Concerning packet mode services, Che GSM PLMN network supports both: - basic packet/PAD mode, allowing the GSM users to access dial-in asynchronous (PAD) or synchronous (AU/PH) ports of a PSPDN (to which individu
28、al subscriber is subscribed to) , using respectively BS 2x or BS 3x GSM Bearer Services; - dedicated packet/PAD mode, allowing the GSM users a “seemingly immediate“ access to the PSPDN world, without any explicit intermediate passage on the transit network ta access the PSPDN port; BS 4x and BS 5x a
29、re used in this case. 4. NETWORK ARCHITECTURE As identified in CCITT Rec. F.300, various configurations are permitted for the structure of a Videotex system. A terminal can be connected to a Videotex host server: - directly by a telecommunication network; m 3404583 0078637 660 m PSTN andat BSS - MSC
30、AWF GSM 03.43 - version 4.1.1 - page 6 host - via a Packet Assembiy/Disassembly (PAD); - via a Videotex Access Point (VAP); - via a Videotex Service Centre (VSC) which may also act as a Videotex host. All these configurations can be supported by a GSM PLMN, as detailed in the following network schem
31、es. 4.1 Videotex host directly connected to PSTN/ISDN When it is assumed that the Videotex centre is directly connected to the Fig.2/03.43. Fig.2/03.43 VTX PSTN/ISDN, the network scheme is as shown in Y 3.1 kHr audio I ISDN U host directly connected to PSTN/ISDN With reference to the general scheme
32、in Fig.1/03.43, the terminating network (in this case working as transit network as well) uses a 3.1 kHz audio information transfer capability; at both ends of the terminating network (MSC/IWF and VTX host) a voiceband modem is allocated, whose actual bit-rate is selected in the BC-IE at Call Establ
33、ishment, within the GSM standard rates (maximun 9600 bit/s). BS 2x series apply in this case. Note: The Vtx host and terminal have to cope with the additional delay introduced by the PLMN network (i.e., in the range of 200 ms 1 4.2 Videotex host accessed via PAD Fig. 3/03.43 summarizes this configur
34、ation, outlining all possible network alternatives. 3.1 kHr,audio A Y U m 3404583 0078640 382 m t I GSM 03.43 - version 4.1.1 - page 7 VTX host Fig. 3/03.43 VTX host accessed via PAD The main service alternative concerns basic/dedicated PAD access. In case of basic PAD access, the transit network (P
35、STN and/or ISDN) is utilized to access the PAD, remotely located with respect to MSC/IWF; the Videotex customer has to make a E.164 Call to the desired PAD, then a second step is necessary to access the Videotex host. BS 2x are utilized in this case; the information transfer capability on the transi
36、t network is 3.1 kHz audio (PSTN or ISDN). In case of dedicated PAD access, two options are still possible (see TS GSM 09.05): - the PAD is remotely located with respect to the IWF, and automatically connected to IWF, via a dedicated circuit or a data circuit on a public network (PSTN or ISDN), so t
37、hat the Videotex user has “direct“ access to the PAD; - the PAD is located in the MSC/IWF, and connected to the PSPDN via X.25 or X.75. I The dedicated PAD access provides the shortest possible connection from the PLMN to a PAD for both home subscribers staying in the home PLMN and foreign subscribe
38、rs roaming in a visited PLMN. BS 4x are utilized for dedicated PAD access. 4.3 Videotex host accesaed via VAP Fig. 4/03.43 summarizes this configuration, outlining all possible network alternatives. I I II - proprietary Fig. 4/03.43 VTX host accessed via VAP Circuit Mode access to the VAP via ISDN t
39、ransit network (and BS 3x1 is according to ETC 300 079 and ETS 300 080. GSM 03.43 - version 4.1.1 - page 8 Concerning Packet mode access to VAP, again the main choice is basic/dedicated packet mode. In case of basic packet mode configuration, the transit network is utilized to access a conventional
40、X.32 dial port in the PSPDN or a PH function (X.31 Case A), remotely located with respected to MSC/IWF and functionally operating as VAP with respect to Videotex service. The Videotex customer has to make a E.164/E.163 Call to the desired dial port/PH, then a second step is necessary to access the V
41、ideotex host. BS 3x are utilized in this case; the information transfer capability on the transit network is 3.1 kHz audio (PSTN or ISDN) or UD1 (ISDN) . In case of dedicated packet mode, the PH is logically part of the PLMN. The interface between the PH and the PSPDN is X.75 or proprietary; two opt
42、ions are still possible for its physical location : I - the PH is remotely located with respect to the IWF; - the PH (VAP function) is located in the PLMN. BS 5x are utilized in this case. The dedicated packet mode provides the shortest possible connection from the PLMN to a PSPDN for both home subs
43、cribers staying in the home PLMN and foreign subscribers roaming in a visited PLMN. 4.4 Videotex host accessed via VSC Though the Videotex Access Function is explicitly separate with respect to the Videotex host, no impact results on the overall Network architecture. Actually the VSC can be consider
44、ed a front-end function of the same Videotex host (either physically separate or integrated), so that all the above configuration in principle apply. In particular the network schemes in Figures 3, 4/03.43 are appropriate, and all the above considerations on basic/dedicated PAD access/packet mode ar
45、e still relevant. 5. REFERENCE CONFIGURATION OF THE MOBILE STATION The following types of reference configuration of the mobile station are possible: 3404583 0078642 155 D I 8 .R TA - s GSM 03.43 - version 4.1.1 - page 9 I I I I MT1 . bl I I I - Mobile station n I I TE 1 S R I 1 MT21-i I l l I MT1 I
46、 I I I I Um Fig. 5/03-43 Reference Configuration of the MS The definitiom of thi! functional blocks shown in Fig. 5 are reported in TS GCM 04.02. Concerning specific Videotex functions of the terminal, full support of end-to-end protocols for Syntax-based Videotex is granted in a GSM PLMN, within th
47、e limitation of 9600 bitis as maximum speed, due to inherent bounds of GSM system. In this respect, TE2 shall be: - either a conventional Videotex terminal operating in asynchronous circuit mode on a V.series standard interface; - or a fully compliant SBVT equipment operating in synchronous packet m
48、ode as per ETS 300 221 standard (lower layers) and ETS 300 223. TE1 shall be a typical ISDN-SBVT equipment, operating according to either ISDN Circuit mode (ETS 300 079 and ETS 300 080 standards) or ISDN packet mode (ETS 300 218 and 300 223 standards). MTO integrates in a single equipment both Video
49、tex and mobile termination functions. 6. BEARER SERVICE CONFIGURATION AND SETTINGS Support of Videotex service on the the GSM PLMN is via GSM standard Bearer Services, as specified in various GSM Technical m 3YOY583 0078643 Ol m GSM 03.43 - version 4.1.1 - page 10 h Specification. In the following specific reference on the main technical aspects are reviewed. 6.1 Connection Types Transparent or non-transparent network support can be requested to the GSM PLMN for Videotex service. The information transfer protocol models are those in Fig. 6/GSM 03.10, models la, 2a, 3a, 4a for ISDN-
