ITU-T G 967 2-1999 V-Interfaces at the Service Node (SN) VB5 2 Reference Point Specification - Series G Transmission Systems and Media Digital Systems and Networks Digital Transmisi.pdf
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1、STD*ITU-T RECMN G-9b7-2-ENGL 2999 48b2592 ObbL340 Ob2 INTERNATIONAL TELECOMMUNICATION UNION ITU=T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU G.967.2 (02199) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Digital transmission systems - Digital sections and digital line sy
2、stem - Digital section and digital transmission systems for customer access to ISDN V-interfaces at the service node (SN): VB5.2 reference point specification ITU-T Recommendation G. 967.2 (Previously CCITT Recommendation) STD.1TU-T RECON G-967.2-ENGL LTT? .II 4862591 Obbb341 TTT = ITU-T G-SERIES RE
3、COMMENDATIONS TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS INTERNATIONAL TELEPHONE CONNECTIONS AND CIRCUITS INTERNA TIONA L A NA LOWE CARRIER SYSTEM TRANSMISSION SYSTEMS INDIVIDUAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE SYSTEMS ON METALLIC LINES GENERAL CHARACTERISTICS CO
4、MMON TO ALL ANALOGUE CARRIER- GENERAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE WITH METALLIC LINES SYSTEMS ON RADIO-RELAY OR SATELLITE LINKS AND INTERCONNECTION COORDINATION OF RADIOTELEPHONY AND LINE TELEPHONY TES TING E QUIPMEN TS TRANSMISSION MEDIA CHARACTERISTICS DIGITAL TRANSMISSION S
5、YSTEMS TERMINAL EQUIPMENTS DIGITAL NETWORKS DIGITAL SECTIONS 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 sy
6、stems provided by FDM transmission bearers Digital line systems G. 1 00-G. i 99 G.200-G.299 G.300-G.399 G.400-G.449 G.450-G.499 G. 600-G .699 G.700-G.799 G. 800-G . 899 G.900-G.999 G.900-G.909 G.910-G.919 G.920-G.929 G. 9304.939 G ,940-(3.949 G. 950-G. 959 .96 Optical fibre submarine cable systems O
7、ptical line systems for local and access networks Access networks G. 970-G . 979 G. 980-G. 989 G.990-G.999 Far further details, please refe. to ITU-T List of Recommendations V-INTERFACES AT THE SERVICE NODE (SN): VB5.2 REFERENCE POINT SPECIFICATION Summary This Recommendation specifies the physical,
8、 procedural and protocol requirements for interfaces at the VB5.2 reference point between an Access Network (AN) and a Service Node (SN). The VB5.2 reference point provides flexible (provisioned) virtual path link allocation and flexible (provisioned) virtual channel link allocation (controlled by t
9、he 43 interfaces) as well as on-demand virtual channel link allocation controlled by the SN via the broadband bearer connection control (B-BCC) protocol. That is the VB5.2 reference point is a superset of the VB5.1 reference point, enabling on-demand virtual channel link allocation in the AN and acr
10、oss the VB5 reference point via the additional B-BCC function. Source ITU-T Recommendation G.967.2 was prepared by ITU-T Study Group 13 (1997-2000) and was approved under the WTSC Resolution No. 1 procedure on the 15th of February 1999. Keywords Access Network, Service Node, VB5 reference point. Rec
11、ommendation 6.967.2 (02/99) I .STD-ITU-T RECMN G.9b3.2-ENGL 1999 = 48b259L ObbL343 871 FOREWORD ITU (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of th
12、e 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, establishes th
13、e 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 areas of information technology which fall within ITU-T?s pu
14、rview, 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 Administra
15、tion, 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 take
16、s 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 intellectual pr
17、operty, 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 publicatio
18、n 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. Recommendation G.967.2 (02/99) 11 1 2 3 3.1 3.2 4 5 5.1 5.2 5.3 5.4 5.5 6 6.1 6.2 6.3 6.4 - STDmITU-T RECMN G*9h72-ENGL 3999 H 4862
19、593 Obh1344 708 CONTENTS Scope References Definitions. symbols and abbreviations . Definitions Abbreviations . Field of application . Introduction to the VB5.2 reference point concept General VB5.2 design principles General reference model for the VB5.2 reference point . General characteristics of i
20、ndividual functional groups . User port function characteristics 5.3.1 5.3.2 5.3.3 ATM connection function characteristics . Service port function characteristics . Functional modelling 5.4.1 Modelling of user port function 5.4.2 Modelling of service port function 5.4.3 Modelling of ATM connection f
21、unction . AN view and SN view of physical and logical ports Procedural interface requirements Introduction Physical layer requirements ATM layer requirements 6.3.1 Cell header format and encoding and pre-assigned cell headers for use by the ATM layer . 6.3.2 Cell Loss Priority (CLP) . 6.3.3 VPC carr
22、ying RTMC and B-BCC protocol VCCs . 6.3.4 OAM Higher layer interface requirements . 6.4.1 User plane 6.4.2 Control plane . 6.4.3 Management plane 6.4.4 Establishment of VP and VC linkskonnections . 6.4.5 ATM adaptation layer for the RTMC protocol . 6.4.6 ATM adaptation layer for the B-BCC protocol P
23、age 1 2 5 5 5 8 8 8 9 9 9 10 10 10 10 10 10 11 11 11 12 12 12 13 13 13 13 13 13 13 14 14 14 . Recommendation 6.967.2 (02/99) 111 6.5 6.6 6.7 7 7.1 7.2 7.3 7.4 7.5 7.6 8 8.1 8.2 8.3 9 9.1 9.2 9.3 9.4 10 Meta-signalling . Interface Management Application Usage information transfer . Broadband access n
24、etwork connection types . Introduction to connections/connection elements Multipoint requirements . Broadband access network connection element identifiers 7.3.1 Connection element identifiers in user-to-network signalling messages 7.3.2 Connection element identifiers in RTMC messages . 7.3.3 Connec
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