1、STD-ITU-T RECflN G=Sbb-ENGL 1999 m 48b2591 Obb1503 “53 m INTERNATIONAL -TELECOM MUN KATION UN ION ITU=T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU G.966 (02199) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Digital transmission systems - Digital sections and digital lin
2、e system - Digital section and digital transmission systems for customer access to ISDN Access digital section for B-ISDN ITU-T Recommendation G.966 (Previously CCITT Recommendation) ITU-T G-SERIES RECOMMENDATIONS TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS iNTERNATIONAL TELEPHONE C
3、ONNECTIONS AND CIRCUITS NTERNA TIONA L A NA LOG UE CARRIER SYSTEM ENERAL CHARACTERISTICS COMMON TO ALL ANALOGUE CARRIER- TRANSMISSION SYSTEMS INDIVIDUAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE SYSTEMS ON METALLIC LINES G.100-G.199 G.200-G.299 G.300-G.399 GENERAL CHARACTERISTICS OF INTERNA
4、TIONAL CARRIER TELEPHONE SYSTEMS ON RADIO-RELAY OR SATELLITE LINKS AND INTERCONNECTION WITH METALLIC LINES G.400-G.449 COORDINATION OF RADIOTELEPHONY AND LINE TELEPHONY TESTING EQUIPMEN TS TRANSMISSION MEDIA CHARACTERISTICS DIGITAL TRANSMISSION SYSTEMS TERMINAL EQUIPMENTS DIGITAL NETWORKS DIGITAL SE
5、CTIONS AND DIGITAL LINE SYSTEM General Parameters for optical fibre cable systems Digital sections at hierarchical bit rates based on a bit rate of 2048 kbis Digital line transmission systems on cable at non-hierarchical bit rates Digital line systems provided by FDM transmission bearers G.450-G.499
6、 G.600-G.699 G.700-G.799 G.800-G.899 G.900-G.999 G.900-G.909 G. 9 I O-G. 9 1 9 G.920-G.929 G.930-G.939 G. 940-G. 949 Digital line systems G.950-G.959 Optical fibre submarine cable systems G.970-G.979 Optical line systems for local and access networks Access networks G.980-G.989 G.990-G.999 For furth
7、er details, please refer to ITU-T List of Recommendations. STD-ITU-T RECflN GmSbb-ENGL 1999 Li8b2591 Obb1505 8aT w ITU-T RECOMMENDATION G.966 4. ACCESS DIGITAL SECTION FOR B-ISDN Summary The purpose of this Recommendation is to define the characteristics of a B-ISDN access digital section for the B-
8、ISDN customer access between the broadband user-network interface (at the TB reference point) and the first ATM equipment on the network side of the B-NT1 (at V, reference i I point). Source ITU-T Recommendation G.966 was prepared by ITU-T Study Group 13 (1997-2000) and was approved under the WTSC R
9、esolution No. 1 procedure on the 26th of February 1999. 1 Recommendation 6.966 (02/99) STD-ITU-T RECMN Goqhh-ENGL 2999 = 48b2591 Ohb150b 766 0 4, FOREWORD ITU (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommunications. The ITU Telecommunicatio
10、n Standardization Sector (ITU-T) is a permanent organ 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 Conf
11、erence (WTSC), which meets every four years, establishes the topics for study by the ITU-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 a
12、reas of information technology which fall within ITU-Ts 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 oper
13、ates a public correspondence service. The terms Administration, 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
14、use of a claimed Intellectual Property Right. The ITU 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 Recommen
15、dation, the ITU had not received notice of intellectual 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.
16、O ITU 1999 All rights reserved. No part of this publication 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 G.966 (02/99) I - _ 1 2 3 3.1 3.2 4 4.1 5 5.1 6 6.1 6.2
17、 6.3 7 8 8.1 8.2 CONTENTS Page Scope 1 References 1 . Definitions and abbreviations 2 Definitions 2 Abbreviations 3 . Reference configuration . Application . Functional configuration Relationship between TMN and the B-ISDN access digitai section Main functions Functions of B-ISDN access digital sect
18、ion . ATM cell stream transfer 6.1.2 Transmission path functions 6.1.3 Digital section functions 6.1.4 Bit timing 6.1.5 OAM functions 6.1.6 Management information transfer . 6.1.7 Power feeding General functional architecture of B-NT1 6.2.1 Transfer functions . 6.2.2 Layer management functions 6.2.3
19、 Plane management functions . 6.2.4 Timing functions . General functional architecture of B-LT 6.3.1 Transfer functions . 6.3.2 Layer management functions 6.3.3 Plane management functions . 6.1.1 6.3.4 Timing functions . 4 5 6 6 8 8 8 8 9 9 9 9 9 9 10 11 11 11 12 12 12 13 13 . Network performance 13
20、 Operation and maintenance OAM functions . 8.1.1 Monitoring functions . 8.1.2 Control functions . OAM procedures 13 13 14 15 15 . Recommendation 6.966 (02/99) 111 STD-ITU-T RECMN G-Sbb-ENGL 48b25L ObbL508 539 m Annex A - B-ET physical layer state transition table . Annex B - B-ISDN access digital se
21、ction state transition tables Page 17 21 iv Recommendation 6.966 (02/99) - - Recommendation G.966 *. ACCESS DIGITAL SECTION FOR B-ISDN (Geneva, 1999) 1 Scope This Recommendation defines the characteristics of the B-ISDN access digital section for the B-ISDN customer access between the B-ISDN user-ne
22、twork interface (at the TB reference point, defined in Recommendation 1.413 9) and the first ATM equipment on the network side of the B-NT1 (at V, reference point). Both homogeneous and non-homogeneous access digital sections are possible, depending on the functionality required. This Recommendation
23、 applies to the non-homogeneous B-ISDN access digitai section where the bit rate used for the UNI is different from the bit rate of other parts of the section. In this case, transmission path termination and TC sublayer functions are provided by the access digital section. In the case of a homogeneo
24、us B-ISDN access digital section, where the bit rates are the same for the UNI and the other parts of the section, transmission path termination and TC sublayer functions are not required. This case is outside the scope of this Recommendation. In this Recommendation and unless otherwise indicated, t
25、he term B-TE is used to indicate terminating layer 1 aspects of B-TE, B-TA and B-NT2 functional groups (as defined in Recommendation 1.413 9). The term B-ET is used to indicate terminating layer 1 aspects of the first ATM equipment on the network side of the B-NT1 (at VB, reference point). When the
26、term B-TE indicates terminating layer 1 aspects of B-TE, then according to Recommendation 1.413 9, the S, and TB reference points coincide. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Re
27、commendation. At the time of publication, the editions indicated were valid. All Recommendations and other references are subject 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
28、 references listed below. A list of the currently valid ITU-T Recommendations is regularly published. 11 ITU-T Recommendation G.704 (1 998), Synchronous pame structure used at 1544, 6312, 2048, 8448 and 44 736 kbith hierarchical levels. 2 ITU-T Recommendation G.803 (1997), Architecture of transport
29、networks based on the synchronous digital hierarchy (SDH). 3 ITU-T Recommendation G.821 (1996), Error performance of an international digital connection operating at a bit rate below the primary rate and forming part of an integrated services digital network. ITU-T Recommendation G.826 (1 999), Erro
30、r performance parameters and objectives for international, constant bit rate digital paths at or above the primary rate. ITU-T Recommendation G.827 (1 996), Availability parameters and objectives for path elements of international constant bit rate digital paths at or above the primary rate. 4 5 Rec
31、ommendation G.966 (02/99) 1 3 3.1 ITU-T Recommendation G.902 (1 999, Framework Recornmendation on Jiznctional access networks - Architecure and functions, access types, management and service node aspects. ITU-T Recommendation 1.3 1 i ( 1996), B-ISDN general network aspects. CCITT Recommendation 1.3
32、2 1 (1 991), B-ISDN protocol reference model and its application. ITU-T Recommendation 1.4 13 (1 993), B-ISDN user-network interface. ITU-T Recommendation 1.414 (1997), Overview of Recommendations on layer I for ISDN and B-ISDN customer accesses. ITU-T 1.432.-series Recommendations, B-ISDN user-netw
33、ork interface - Physical layer specijcation. NOTE - This reference applies to Recommendations 1.432.1,1.432.2,1.432.3,1.432.4 and 1.432.5. ITU-T Recommendation 1.610 (1999), B-ISDN operation and maintenance principles and functions. ITU-T Recommendation 1.732 (1 996), Functional characteristics of A
34、TM equipment. ITU-T Recommendation 1.75 1 (1 996), Asynchronous transfer mode management of the network element view. ITU-T Recommendation M.3610 (1996), Principles for applying the TMN concept to the management of B-ISDN. ITU-T Recommendation G.783 (1 997), Characteristics of synchronous digital hi
35、erarchy (SDH) equipmenthnctional blocks. ITU-T Recommendation G.784 (1 994), Synchronous digital hierarchy (SOH) management. CCITT Recommendation G.774 (1 992), Synchronous digital hierarchy (SOH) management information model for the network element view. ITU-T Recommendation G.805 (1 999, Generic h
36、nctional architecture of transport network. Definitions and abbreviations Definitions This Recommendation defines the following terms: 3.1.1 between the user-network interface at reference point TB and the reference point V, . broadband access digital section: is defined in Recommendation 1.414 lo a
37、s the section 3.1.2 rate used for the UNI is the same as the bit rate of other parts of the section. homogeneous access digital section: is defined as an access digital section where the bit 3.1.3 bit rate used for the UNI is different from the bit rate of other parts of the section. non-homogeneous
38、 access digital section: is defined as an access digital section where the In addition, this Recommendation uses terms defined in other ITU-T Recommendations: Broadband exchange termination (B-ET), Broadband network termination 1 (B-NT1): Recommendation 1.413 9. I B-ISDN customer access: Recommendat
39、ion 1.414 101. Communication function (CF): Recommendation M.3610 151. 2 Recommendation G.966 (02/99) STDmITU-T RECMN GOShh-ENGL 1997 W 4Bb259L Ohhl1511 023 I 3.2 Abbreviations This Recommendation uses the following abbreviations: AIS Alarm Indication Signal AN Access Network ATM Asynchronous Transf
40、er Mode BER Bit Error Ratio B-ET Broadband Exchange Termination BIP Bit Interleaved Parity B-ISDN B-LT Broadband Line Termination B-NT1 Broadband Network Termination 1 B-NT2 Broadband Network Termination 2 B-TA Broadband Terminal Adapter B-TE Broadband Terminal Equipment CF Communication Function CL
41、P Cell Loss Priority CRC Cyclic Redundancy Check DS Digital Section EDC Error Detection Code FC Failure Condition GFC Generic Flow Control HEC Header Error Control HOP High Order Path HOPA High Order Path Adaptation HOPT High Order Path Termination LCD Loss of Cell Delineation LOC Loss of Continuity
42、 LOF Loss of Frame synchronization LOM Loss of Multifiame LOP Loss of Pointer LOS Loss of Signal MPH MI“-EI MI“ Error Indication MS Multiplex Section MSA Multiplex Section Adaptation MST Multiplex Section Termination OAM Operations and Maintenance OCD Out of Cell Delineation PDH Plesiochronous Digit
43、al Hierarchy Broadband Integrated Services Digital Network Management (entity) PHysical (layer) primitive Recommendation G.966 (02/99) 3 STD-ITU-T RECMN G-Sbb-ENGL 1997 b 48b2591 Obb15L2 TbT M PH P-LOP P-PLM P-TIM P-UNEQ RAI RDI Reg RS RSA RST SDH SN SNI STM TC TM TML, TMN TP-A TP-ALM PAT TP-TLh4 TP
44、TT TP-T UNI VCI VP VPI VPT PHysical (layer) Path Loss of Pointer Path Payload Mismatch Path Trace Identifier Mismatch Path Unequipped Remote Alm Indication Remote Defect Indication Regenerator Regenerator Section Regenerator Section Adaptation Regenerator Section Termination Synchronous Digital Hier
45、archy Service Node Service Node Interface Synchronous Transmission Multiplex Transmission Convergence Transmission Media Transmission Layer for Layer Management Telecommunications Management Network Transmission Path Adaptation Transmission Path Adaptation for Layer Management Transmission Path Adap
46、tation for Transfer function Transmission Path Termination Transmission Path Termination for Layer Management Transmission Path Termination for Transfer function User-Network Interface Virtual Channel Identifier Virtual Path Virtual Path Identifier Virtual Path Termination a. 4 Reference configurati
47、on Figure 1 shows the boundaries of the B-ISDN access digital section, which consists of the functional groups broadband network termination 1 (B-NTl), broadband line termination (B-LT) and the digital transmission system. 4 Recommendation 6.966 (02199) - - STDeITU-T RECMN G-7bb-ENGL I- I l Figure U
48、G.966 - B-ISDN access digital section and access digital transmission system The concept of the B-ISDN access digital section is used in order to allow a functional description and a definition of the requirements of this part of public broadband networks. NOTE - From a functional point of view, the
49、 information transferred via the reference points TB and VB, is different and therefore the B-ISDN access digital section is not symmetrical. At the B-ISDN access digital section termination points, Recommendations 1.413 9 and I.432.x i i (TB reference point) and 1.414 lo FBI reference point) apply. The concept of a digital transmission system is used in order to describe the characteristics of an implementation, using a specific medium, in support of the B-ISDN access digital section. Implementation rules
