ITU-T X 46-1998 Access to FRDTS Via B-ISDN - Series X Data Networks and Open System Communications Public Data Networks - Interfaces《通过B-ISDN接入FRDTS 系列X》.pdf

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1、STD-ITU-T RECMN X-Qb-ENGL 1998 48b2591 Ob59b51 TLO INTERNATIONAL TELECOMMUNICATION UNION ITU=T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU X.46 (09/98) SERIES X: DATA NETWORKS AND OPEN SYSTEM COM M U N 1 CAT I O N S Public data networks - Interfaces Access to FRDTS via B-ISDN ITU-T Recommendatio

2、n X.46 (Previously CCITT Recommendation) ITU-T X-SERIES RECOMMENDATIONS DATA NETWORKS AND OPEN SYSTEM COMMUNICATIONS UBLIC DATA NETWORKS Services and facilities X. 1-X.19 Interfaces I . x20-x49 . Transmission, signalling and switching Network aspects Maintenance Administrative arrangements )PEN SYST

3、EMS INTERCONNECTION Model and notation Service definitions Connection-mode protocol specifications Connectionless-mode protocol specifications PICS proformas Protocol Identification Security Protocols Layer Managed Objects Conformance testing General Satellite data transmission systems MESSAGE HANDL

4、ING SYSTEMS DIRECTORY OS1 NETWORKING AND SYSTEM ASPECTS INTERWORKING BETWEEN NETWORKS Networking Efficiency Quality of service Naming, Addressing and Registration Abstract Syntax Notation One (ASN.l) Systems Management framework and architecture Management Communication Service and Protocol Structur

5、e of Management Information Management functions and ODMA functions OS1 MANAGEMENT SECURITY OS1 APPLICATIONS Commitment, Concurrency and Recovery Transaction processing Remote operations OPEN DISTRTBUTED PROCESSING X.50-X.89 X.90-X. 149 X.150-X.179 X. 180-X.199 x.200-x.209 X.2 10-X.219 X.220-X.229 X

6、.230-X.239 X.240-X.259 X.260-X.269 X.270-X.279 X.280-X.289 X.290-X.299 x.300-x.349 X.350-X.399 x.400-x.499 x.500-x.599 X.600-X.629 X.630-X.639 X .640-X.649 X.650-X.679 X.680-X.699 X.700-X.709 X.710-X.719 X.720-X.729 x.730-x.799 X.800-X.849 X.850-X.859 X.860-X.879 X.880-X.899 x.900-x.999 For further

7、details, please refer to ITU-T List of Recommendations. STD-ITU-T RECMN X*Lib-ENGL 1978 W 48b257L Ob57b53 893 W ITU-T RECOMMENDATION Xe46 ACCESS TO FRDTS VIA B-ISDN Summary This Recommendation defines services available and signalling procedures operated at the SB/TB reference point of a B-ISDN for

8、access to fiame relay data transmission service via the B-ISDN. Procedures defined in this Recommendation are based on the Network interworking scenario and port access method of interworking. Source IT-T Recommendation X.46 was prepared by ITU-T Study Group 7 (1997-2000) and was approved under the

9、WTSC Resolution No. 1 procedure on the 25* of September 1998. Recommendation X.46 (09/98) 1 FOREWORD IT (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommuni- cations. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ

10、 of the ITU. The ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Conference (WTSC), which meets every four years, establis

11、hes the topics for study by the IT-T Study Groups which, in their turn, produce Recommendations on these topics. The approval of Recommendations by the Members of the ITU-T is covered by the procedure laid down in WTSC Resolution No. 1. In some areas of information technology which fall within ITU-T

12、s purview, the necessary standards are prepared on a collaborative basis with IS0 and IEC. NOTE In this Recommendation the term recognized operating agency (ROA) includes any individual, company, corporation or governmental organization that operates a public correspondence service. The terms Admini

13、stration, ROA and public correspondence are defined in the Constitution of the ITU (Geneva, 1992). INTELLECTUAL PROPERTY RIGHTS The ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. The ITU

14、takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, the ITU had not received notice of intellectua

15、l property, protected by patents, which may be required to implement this Recommendation. However, implementors are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. O ITU 1999 All rights reserved. No part of this public

16、ation may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the ITU. 11 Recommendation X.46 (09198) - - STD-ITU-T RECMN X-Lib-ENGL 1998 48b259L 0659b55 bbb 7 8 9 10 11 CONTENTS Page Scope . 1 Refe

17、rences 1 Terms and definitions . 3 Abbreviations . 3 General service aspects . 4 Reference configurations. . 4 6.1 Configuration when accessing FRPDN via a B-ISDN 4 6.2 Configuration when accessing the fiame relay data transmission services of an ISDN via a B-ISDN 6 Service aspects 7 7.1 General 7 7

18、.2 Service characteristics . 7 7.3 User access capabilities . 8 7.4 Basic rules . 9 Addressing and routing aspects 9 8.1 Outgoing calls . 9 8.2 Incoming calls . 9 . Interworking with dedicated networks . 11 9.1 General 11 9.2 Access to FRDTS via a B-ISDN . 11 Procedures 1 1 10.1 General 12 10.2 Proc

19、edures . 12 10.3 ATM switched virtual channel connection clearing. . 14 10.4 ATM switched virtual channel connection clear collision 14 10.5 Restart procedures . 14 10.6 Handling of error conditions . 14 10.7 ATM status monitoring procedure 15 Terminal adapter functionalities . 15 1 1.1 General 15 1

20、1.2 Access to FRDTS via a B-ISDN . 16 Recommendation X.46 (09/98) . 111 STD-ITU-T RECMN Xa4b-ENGL 1998 48b2591 Ob59656 5T2 Recommendation X.46 ACCESS TO FRDTS VIA B-ISDN (Geneva, 1998) 1 Scope This Recommendation defines the procedures of access to Frame Relay Data Transmission Service (FRDTS) via a

21、 B-ISDN. It includes two cases: a) FRPDN provides the FRDTS. b) ISDN provides the FRDTS. The Interworking scenario used in this Recommendation is the Network interworking scenario as specified in Recommendation 1.555, and the port access method of interworking as specified in the X.300-series Recomm

22、endations. 2 References The following IT-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were valid. All Recommendations and other references are subject

23、to revision; all users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of currently valid ITU-T Recommendations is regularly published. IT-T Recommendation E. 164 (1997

24、), The international public telecommunication numbering plan. ITU-T Recommendation E.166BC. 122 (1998), Numbering plan intenuorking for the E. 164 and X.121 numbering plan. IT-T Recommendation 1.21 1 (1993), B-ISDN service aspects. IT-T Recommendation 1.356 (1996), B-ISDN ATM layer cell transfer per

25、formance. ITU-T Recommendation 1.36 1 (1995), B-ISDN ATMlayer specification. ITU-T Recommendation 1.362 (1993 - withdrawn in 1997), B-ISDN ATM adaptation layer (AAL) functional description. ITU-T Recommendations I.363.X. series, B-ISDN ATM adaptation layer specification. ITU-T Recommendation 1.365.1

26、 (1993), B-ISDN ATM adaptation layer sublayers: Frame Relaying Service Specific Convergence Sub layer (FR-SSCS). IT-T Recommendation 1.41 3 (1993), B-ISDN user-network interface. ITU-T Recommendation 1.43 O ( 1995), Basic user-network interface - Layer 1 specification. ITU-T Recommendations 1.43 1 (

27、1993), Primary rate user-network interface - Layer 1 specification. IT-T Recommendations 1.432.X series, B-ISDN user-network interface - Physical layer specificaion. IT-T Recommendation 1.580 (1995), General arrangements for interworking between B-ISDN and 64 kbit/s based ISDN. Recommendation X.46 (

28、09/98) 1 1291 3 11 1321 1331 i341 2 ITU-T Recommendation 1.6 10 (1 993, B-ISDN operation and maintenance principles andfunctions. ITU-T Recommendation 4.933 (1995), Signalling specifications for frame mode switched and permanent virtual connection control and status monitoring. ITU-T Recommendation

29、Q.2110 (1994), B-ISDN ATM adaptation layer - Service Specific Connection Oriented Protocol (SSCOP). IT-T Recommendation 4.2130 (1994), B-ISDN signalling ATM adaptation layer - Service Specific Coordination Function for support of signalling at the User-Network Interface (SSCF at UNI). ITU-T Recommen

30、dation 4.2761 (1999, Functional description of the B-ISDN user part (B-ISUP) of signalling System No. 7. IT-T Recommendation 4.293 1 (1995 - modified by 4.297 1, 1995), Digital Subscriber Signalling System No. 2 - User Network Interface (UNI) layer 3 specijcation for basic call/connection control. I

31、T-T Recommendation 4.2933 (1996), Digital subscriber signalling system No. 2 - Signalling specifcation forframe relay service. IT-T Recommendation 4.296 1.2 (1997), Digital subscriber signalling system No. 2 - Additional trafic parameters: Support of ATM transfer capabiliy in the broadband bearer ca

32、pabiliy information element. ITU-T Recommendation V.25 bis (1 996), Synchronous and asynchronous automatic dialling procedures on switched networks. ITU-T Recommendation X.l (1996), International user classes of service in, and categories of access to, public data networks and Integrated Services Di

33、gital Networks (ISDNs). CCITT Recommendation X.21 (1992), Interface between Data Terminal Equipment and Data Circuit- terminating Equipment for synchronous operation on public data networks. CCITT Recommendation X.21 bis (1988), Use on public data networks of Data Terminal Equipment (DTE) which is d

34、esigned for interfacing to synchronous V-series modems. ITU-T Recommendation X.25 (1996), 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. ITU-T Recomme

35、ndation X.30I.461 (1993), Support of X21, X.21 bis and X.20 bis based Data Terminal Equipments (DTEs) by an Integrated Services Digital Network (ISON). ITU-T Recommendation X.32 (1996), Interface between Data Terminal Equipment (DTE) and Data Circuit- terminating Equipment (DCE) for terminals operat

36、ing in the packet mode and accessing a Packet-Switched Public Data Network through a public switched telephone network or an Integrated Services Digital Network or a Circuit-Switched Public Data Network. ZTU-T Recommendation X.36 (1999, Interface between Data Terminal Equipment (DTE) and Data Circui

37、t- terminating Equipment (DCE) for public data networks providing frame relay data transmission service by dedicated circuit, ITU-T Recommendation X.76 (1 995), Network-to-network interface between public data networks providing the pame relay data transmission service. IT-T Recommendation X. 12 1 (

38、1996), International numberingplan for public data networks. ITU-T Recommendation X. 122E.166 (1998), Numbering plan interworking for the E. 164 and X. 121 num bering plans. ITU-T Recommendation X.213 (1995) 1 ISOAEC 8348:1996, Information technology - Open Systems Interconnection - Network service

39、definition. IT-T Recommendations X.300 series, Interworking between networks. Recommendation X.46 (09/98) - STD-ITU-T RECMN Xn4b-ENGL 1998 W 48b2591 Ob59bS8 375 W 3 Terms and definitions The Recommendation defines the following terms: 3.1 interworking between AAL and LAPF. FR SSCS (Frame Relay Servi

40、ce Specific Convergence Sublayer): FR SSCS is used at the TE and AU to 4 Abbreviations The Recommendation uses the following abbreviations: AAL ATM AU BCOB B-ET B-ISDN B-NT B-TA CH CPCS CPCS-CI CPCS-LP CPCS-uu DNIC DTE FH FRBS FRDTS FRPDN ISDN IWF NT PVC QOS sscs svc TA TE VCI VPCI ATM Adaptation La

41、yer Asynchronous Transfer Mode Access Unit Broadband Connection Chiented Bearer class Exchange Terminal for Broadband ISDN Broadband ISDN Network Termination for Broadband ISDN Terminal Adapter for Broadband ISDN Cell Handler Common Part Convergence Sublayer CPCS-Congestion Indication CPCS-Loss Prio

42、rity CPCS-User-to-User indication Data Network Identification Code Data Terminal Equipment Frame Handler Frame Relay Bearer Service Frame Relay Data Transmission Service Frame Relay Public Data Network Integrated Services Digital Network Interworking Function Network Termination Permanent Virtual Ci

43、rcuit Quality of Service Service Specific Convergence Sublayer Switched Virtual Call Terminal Adapter Terminal Equipment Virtual Channel Identifier Virtual Path Connection Identifier Recommendation X.46 (09/98) 3 5 General service aspects Frame Relay Data Transmission Services (FRDTSs) are provided

44、by Frame Relay Public Data Networks (FRPDNs) or by Integrated Services Digital Networks (ISDNs). These FRDTSs may be accessed by users of Broadband ISDNs (B-ISDNs). This Recommendation defines the aspects of frame relay data transmission services provided by an FRPDN or an ISDN to the users of B-ISD

45、N in accordance with the services defined in Recommendations 1.21 1 and X. 1. This Recommendation defines the procedures at the user-network interface of a B-ISDN to access frame relay data transmission services provided by an FRPDN or an ISDN in alignment with Recommendations 4.2931, X.36 or 4.933,

46、 respectively. This Recommendation defines the procedures at the user-network interface of a B-ISDN to access f-ame relay data transmission services provided by an FRPDN or an ISDN in alignment with Recommendations 1.432,1.361,1.363, 1.365.1,4.2110 and 4.2130. This Recommendation defines the Termina

47、l Adaptation functions to adapt existing frame relay terminals for use at the user-network interface of a B-ISDN in order to access frame relay data transmission services provided by an FRPDN or an ISDN. Reference configurations There are two reference configurations: Type-A: Access to the Frame Rel

48、ay Data Transmission Service (FRDTS) provided by a Frame Relay Public Data Network (FRPDN) using the B-ISDN. Type-B: Access to the FRDTS provided by an ISDN using the B-ISDN. In the configurations given below, a Terminal Equipment (TE) with frame relay and ATM capabilities is equivalent to a combina

49、tion consisting of a Frame Relay Data Terminal Equipment (FR DTE) and a Terminal Adapter (TA) with ATM capabilities. NOTE 1 - ATM capabilities are in accordance with Recommendations 1.211, 1.432, 1.361, 1.363, 1.365.1, 4.2110 and 4.2130 for TEs/TAs attached to a B-ISDN. In this Recommendation, every reference to the combination of an FR DTE and its TA should always be considered as being applicable to a TE with X.36 or 4.933, and also TA and TE should support AAL type 5 function (CPCS + FR-SSCS) to convey X.36 or 4.933 frames. NOTE 2 -Use of AAL type 1 instead of AA