ETSI GSM 09 06-1996 Digital Cellular Telecommunications System (Phase 2+) Interworking between a Public Land Mobile Network (PLMN) and a Packet Switched Public Data Network Integra.pdf

1、GSM IC I ECHNICAL n a PECI FICATION GSM 09.06 July 1996 Version 5.0.0 Source: ETSI TC-SMG Reference: TS/SMG-O40906Q ICs: 33.060.50 Key words: Digital cellular telecommunications system, Global System for Mobile communications (GSM) GLOBAL SYSTEM FOR MOBILE COMMUNICATIONS Digital ce1 I ular telecomm

2、u n cat ions system (Phase 2+); Interworking between a Public Land Mobile Network (PLMN) and a Packet Switched Public Data NetworMntegrated Services Digital Network (PSPDMSDN) for the support of packet switched data transmission services (GSM 09.06) ETSI European Telecommunications Standards Institu

3、te ETSI Secretariat Postal address: F-O6921 Sophia Antipolis CEDEX - FRANCE Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: secretariatQetsi.fr Tel.: +33 92 94 42 O0 - Fax: +33 93 65 47 16 Copyright Notiication: No

4、 part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. O European Telecommunications Standards Institute 1996. All rights resewed. ETSI GSM*O-Ob b I 3400855 OL278l.1 472 Page 2 GSM 09.06 Version 5.0.0: July

5、 1996 Whilst 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. ETSI

6、. 96 3400855 0327872 329 Page 3 GSM 09.06 Version 5.0.0: July 1996 Contents Foreword . 5 1 2 3 4 5 6 7 8 9 scope . 7 Normative references . 7 Definitions and abbreviations 9 Introduction . 11 Network characteristics 12 5.1 Characteristics of GSM PLMNs 12 5.2 Characteristics of PSPDNs . 12 5.3 Charac

7、teristics of ISDN 12 5.4 Characteristics of the packet service provided by the PH 12 5.5 Characteristics of the packet service provided by a PH assuming the role of an AU or by X.32 . 12 Interworking classifications . 13 6.1 Service interworking 13 6.2 Network interworking . 13 Network interworking

8、scenarios 13 7.1 General 13 7.2 Interworking through transit networks 13 7.3 Direct Interworking 14 Basic packet mode service . 15 8.1 General 15 8.2 Service provided by the GSM PLMN network 15 8.3 Mobile originated calls . 16 8.3.1 Subscriber on home PLMN 16 8.3.2 Subscriber on visited PLMN . 16 Mo

9、bile terminated calls 18 8.4.1 Subscriber on home PLMN 18 8.4.2 Subscriber on visited PLMN . 18 8.5 Mobile originated mobile terminated calls 18 8.6 Subscriber profiles . 18 8.7 GSM bearer services quality of service . 18 8.4 Dedicated packet mode service 19 9.1 General 19 9.2 General application ru

10、les 20 9.3 Specific application of rules for dedicated packet mode service 20 9.4 Mobile originated calls . 21 9.4.1 General . 21 9.4.2 Short code . 22 Particular packet access functionality 22 9.5 History . 23 ETSI GSM*OS-Ob 7b M 3g0085.5 0127873 265 M Page 4 GSM 09.06 Version 5.0.0: July 1996 Blan

11、k page ETSI GSfl*OOb b m 3400855 0127874 1TL M Page 5 GSM 09.06 Version 5.0.0: July 1996 Foreword This Global System for Mobile communications Technical Specification (GTS) has been produced by the Special Mobile Group (SMG) Technical Committee (TC) of the European Telecommunications Standards Insti

12、tute (ETSI). This GTS identifies the Interworking Functions (IWFs) and requirements for the interworking between a GSM Public Land Mobile Network (PLMN) and a Packet Switched Public Data NetworWlntegrated Services Digital Network (PSPDNISDN) for the support of packet services in GSM PLMW within the

13、digital cellular telecommunications system (Phase 2/Phase 2+). The specification from which this GTS has been derived was originally based on CEPT documentation, hence the presentation of this GTS may not be entirely in accordance with the ETSVPNE rules. This GTS is a TC-SMG approved GSM technical s

14、pecification version 5, which contains GSM Phase 2+ enhancementdfeatures to the version 4 GSM technical specification. The ETS from which this Phase 2+ GTS has evolved is Phase 2 GSM ETS 300 603 + Amendment 1 (GSM 09.06 version 4.5.0). GTS are produced by TC-SMG to enable the GSM Phase 2 + specifica

15、tions to become publicly available, prior to submission for the formal ETSI standards approval procedure to become European Telecommunications Standards (ETC). This ensures the earliest possible access to GSM Phase 2 + specifications for all Manufacturers, Network operators and implementors of the G

16、lobal System for Mobile communications. The contents of this GTS are subject to continuing work within TC-SMG and may change following formal TC-SMG approval. Should TC-SMG modify the contents of this GTS it will then be republished by ETSI with an identifying change of release date and an increase

17、in version number as follows: Version 5.x.y where: y the third digit is incremented when editorial only changes have been incorporated in the specif cation; x the second digit is incremented for all other types of changes, .e. technical enhancements, corrections, updates, etc. NOTE: TC-SMG has produ

18、ced documents which give the technical specifications for the implementation of the digital cellular telecommunications system. Historically, these documents have been identified as GSM Technical Specifications (GSM-TSs). These TSs may have subsequently become I-ETSs (Phase l), or ETSdETSI Technical

19、 Reports (ETRs) (Phase 2). TC-SMG has also produced ETSI GSM TSs which give the technical specifications for the implementation of Phase 2+ enhancements of the digital cellular telecommunications system. These version 5.xx GSM Technical Specifications may be referred to as GTSs. ETSI GSbl*09-ab 96 U

20、 3400855 0127875 038 Page 6 GSM 09.06 Version 5.0.0: July 1996 Blank page ETSI GSM*i support of the according addresses and for calls to roaming foreign subscribers via the PH, the PSPDN to provide redirection functionality as the gateway of home PLMNs does for routing circuit switched calls for the

21、ir roaming subscribers. The scenarios described in section 7 shall apply. The mobile user may have to subscribe separately to the services offered by the PSPDN port of a PSPDN or by the PH of the ISDN or PSPDN and/or home PLMN, which may depend on the policy or agreements reached between GSM PLMN op

22、erator and ISDN or PSPDN operators. The GSM PLMN networks shall provide only the circuit connection to/from the PH or the PSPDN port. The routing is based on the E.WVE.163 numbering plan because the location of both PH and PSPDN port is identified by E.164/E.163 numbers. Once the connection to the P

23、H or PSPDN port has been established the GSM PLMN is transparent for the user information and in-band control information. The mobile user shall set in the SETUP message the GSM WIE, LLC-IE, and HLGIE according to GSM 07.01 for 30-series type of seMces and the applicable variant and shall insert as

24、the called address the E.164/E.163 number associated with the PH or the PSPDN port. That kind of access allows for mobile users to use customized and standard profiles according to CCITT X.32. These profiles are invisible to the GSM PLMNs. The characteristics of the service are those offered via the

25、 packet handler interface for X.31 Case A. The address of the called subscriber for mobile originated calls is sent to the PH or PSPDN port in the “called address“ field of the X.25 CALL REQUEST packet and is a number in the format as required by the PH or the PSPDN port. On the basis of this number

26、 the PH or the PSPDN port is able to initiate the call establishment to the called subscriber. 8.2 Service provided by the GSM PLMN network Within the GSM PLMN a subscription to the bearer services BS 32, 33 and/or 34 is required. In order to select the basic packet mode service the mobile subscribe

27、r indicates during the call setup the GSM bearer capability IE according to GSM 07.01 “Bearer service 3x; X.32 case“ and as the called address the E.1641E.163 address of the PH or the PSPDN port. The MSC-A shall insert for this type of call the calling party information element containing the Basic

28、MSisdn of the calling mobile subscriber. This information shall be free for being used in conjunction with the calling line identification presentation supplementary service to be performed by the PH, unless the respective GSM PLMN supports the supplementary service Calling Line Identification Restr

29、iction and the mobile subscriber wants to apply Calling Line Identification Restriction also to the basic packet mode senke. In this case only packet services for unidentified subscribers (see ETS300099) would be available to the mobile subscriber. ETSI GSM*O9-06 Page 16 GSM 09.06 Version 5.0.0: Jul

30、y 1996 For roaming subscribers using the basic packe 96 m 3400855 0327885 T87 m mode services the connection shall be establish by the visited PLMN to the PSPDN port or to the PH either in the home country of the respective mobile subscriber or in any other couiitry to which the subscriber is entitl

31、ed to establish calls, .e. via an international ISDN/PSTN link. 8.3 Mobile originated calls 8.3.1 Subscriber on home PLMN This case illustrates a mobile subscriber being in its own GSM PLMN area. The subscriber requires the packet services to be supported by the GSM PLMN network he is subscribed to.

32、 The subscriber requests the appropriate 3x-series service stated in GSM 02.02 by using the BC-IE setting according to GSM 07.01 (restrictions see section 8.7). The SETUP message shall contain the E.164/E.163 address of the PH or PSPDN port. The MSC-A shall select the appropriate IWF and shall estab

33、lish a circuit connection to the addressed PH or to the PSPDN port. “In case where the PH only supports X.31 case 6, the PLMN shall take care of the X.31 case NB conversion to proceed the call.“ 8.3.2 Subscriber on visited PLMN In this case the MSC-A of the VPLMN shall allocate the appropriate inter

34、working functions within the VPLMN, identified from the mobile call set-lp request. If the subscriber is accordingly entitled to, the call shall be routed via the visited PLMNs national transit ISDN or PSTN to the PH or PSPDN port identified by the E.164lE.163 (“Dial-in“-case of Figure 4 and 5/GSM 0

35、9.06). The location of this PH or PSPDN port can be the ISDN or PSTN of the home PLMN or the home PLMN itself or any other ISDN or PSTN. The routing is exactly as for normal data or telephony call addressed to any other subscriber. “In case where the PH only supports X.31 case BI the PLMN shall take

36、 care of the X.31 case A/B conversion to proceed the call“. In this case the visited PLMN may not have any knowledge that the mobile subscriber requests a packet service and no additional functions are required, to those necessary for a corresponding “data circuit duplex synchronous“ (3x-series) ser

37、vice. ETSI GSM*O.Qb 96 E 3400855 0127886 913 m Page 17 GSM 09.06 Version 5.0.0: July 1996 Home Country Visited Country ISDN/ Figure 4/GSM 09.06 VPLMN and ISDWSTN transit network; 3,l kHz audio ex PLMN dial out and in to PH (Note) -_ I- case -I- B 7 1 NOTE: In case of a PH only supporting case B, the

38、 case AIB conversion is necessary in the HPLMN. This is indicated by the mobile using a service number (see section 3). Figure 5/GSM 09.06 VPLMN and ISDN transit network; unrestricted digital information ETSI GS!I*I37*06 96 3400855 0127887 85T = Page 18 GSM 09.06 Version 5.0.0: July 1996 8.4 Mobile

39、terminated calls 8.4.1 Subscriber on home PLMN The scenarios applicable are those given in Figures 1 to WGSM 09.06. The PH or PSPDN port translates, if required, the called address received in the X.25 INCOMING CALL packet to the E.164 mobile subscriber number and initiates a circuit connection to b

40、e routed firstly through to the GMSC of the home PLMN. From there on, the call shall be managed in the same manner as any other data call (see GSM 09.07 and 07.03). In case of more than one subscribed basic packet mode service in the HLR, the highest subscribed user rate is used. If in the Visited P

41、LMN this user rate is not supported, the call will fail.“ 8.4.2 Subscriber on visited PLMN “The scenarios applicable are those given in Figure 1 to 3. In this case the call will be handled as for any other data call for MS in VPLMN (see “Dial out“-case of Figures 4 and 5/GSM 09.06).“ 8.5 Mobile orig

42、inated mobile terminated calls The call will be handled for the mobile originated part according to section8.3 and for the mobile terminated part according to section8.4. The X.25 packet switching function will be performed in the PSPDN. 8.6 Subscriber prof iles All in-band access identification pro

43、cedures between the DTE associated with the MS and the PSPDN port or the PH, if applicable, shall be passed “transparently“ through the GSM PLMN. The service profile selection at the PSPDN port or the PH shall be established on the basis of those identification procedures. The subscriber may have a

44、“default“, a “standard“ or a “customized service profile“ according to ETS 300 099K32. 8.7 GSM bearer services quality of service GSM 03.1 O identifies the protocol layer structures for both the transparent and the non-transparent mode. Both transparent and non-transparent mode of operation are appl

45、icable to the PSPDN Port scenario identified in Figure 1. For the PH scenario shown in Figure 2 only the non-transparent mode is possible. The scenario shown in Figure 2 assumes a 64 kbit/s service provided via the ISDN and supported by the PH using “X.31 flag stuffing“ capabilities. This form of se

46、rvice is not supportable by means of the transparent mode because of the inherent higher throughput rate required, .e. 64 kbit/s. The non-transparent mode can support this form of service because it is able to remodadd flags and bring the actual “real“ throughput rate down/up to one, which GSM and t

47、he PH, respectively, can support. For the transparent mode the GSM PLMN shall provide a synchronous data service with no provision for higher layer capabilities over and above layer 1 (see GSM 09.07 and 07.03). In case of the non-transparent mode, the call Set-up procedures are comparable to those i

48、dentified above with the exception that the “connection element“ in the call Set-up message indicates “non-transparent“. The receipt of this attribute value causes the MT and the IWF to select the L2WRLP capabilities (see GSM 07.03 and 09.07). The X.25 data link layer is terminated by the UR at the

49、MT towards the terminal and reconstituted at the IWF towards the transit network. In case of access to packet handler flag stuffing type of rate adaptation is used between the IWF and the PH. The data link layer parameters to be used at the R and S reference points, respectively, are listed in Table 3/GSM 09.06. ETSI GSM*OS-Ob 96 3400855 0127888 796 Page 19 GSM 09.06 Version 5.0.0: July 1996 The following is applicable for mobile terminated calls: The IWF will not initiate the establishment of the LAPB link to the PWPSPDN port, b