TR-042 ATM Transport Over ADSL Recommendation (Update to TR-017)
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TECHNICAL REPORT TR-042 ATM Transport over ADSL Recommendation (Update to TR-017) Issue: 1.0 Issue Date: August 2001 © The Broadband Forum. All rights reserved. ATM Transport over ADSL Recommendation TR-042 (Update to TR-017) Notice The Broadband Forum is a non-profit corporation organized to create guidelines for broadband network system development and deployment. This Broadband Forum Technical Report has been approved by members of the Forum. This Broadband Forum Technical Report is not binding on the Broadband Forum, any of its members, or any developer or service provider. This Broadband Forum Technical Report is subject to change, but only with approval of members of the Forum. This Technical Report is copyrighted by the Broadband Forum, and all rights are reserved. Portions of this Technical Report may be copyrighted by Broadband Forum members. This Broadband Forum Technical Report is provided AS IS, WITH ALL FAULTS. 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No assurance is given that licenses to patents necessary to implement this Technical Report will be available for license at all or on reasonable and non-discriminatory terms. ANY PERSON HOLDING A COPYRIGHT IN THIS BROADBAND FORUM TECHNICAL REPORT, OR ANY PORTION THEREOF, DISCLAIMS TO THE FULLEST EXTENT PERMITTED BY LAW (A) ANY LIABILITY (INCLUDING DIRECT, INDIRECT, SPECIAL, OR CONSEQUENTIAL DAMAGES UNDER ANY LEGAL THEORY) ARISING FROM OR RELATED TO THE USE OF OR RELIANCE UPON THIS TECHNICAL REPORT; AND (B) ANY OBLIGATION TO UPDATE OR CORRECT THIS TECHNICAL REPORT. Broadband Forum Technical Reports may be copied, downloaded, stored on a server or otherwise re-distributed in their entirety only, and may not be modified without the advance written permission of the Broadband Forum. The text of this notice must be included in all copies. August 2001 © The Broadband Forum. All rights reserved. 2 ATM Transport over ADSL Recommendation TR-042 (Update to TR-017) Table of Contents 1. SCOPE .................................................................................................................................................................6 1.1. INTRODUCTION ................................................................................................................................................6 2. SPECIFIC REFERENCE MODEL....................................................................................................................6 2.1. DEFINITION OF FUNCTIONAL BLOCKS .............................................................................................................7 2.1.1. Access Node (AN).................................................................................................................................7 2.1.2. Broadband Network Termination (B-NT).........................................................................................8 2.2. DEFINITION OF INTERFACES ...........................................................................................................................8 2.2.1. V Interface............................................................................................................................................8 2.2.2. U Interface............................................................................................................................................8 2.2.3. T or S Interface ....................................................................................................................................8 2.2.4. S or R Interface....................................................................................................................................9 3. TRANSPORT OF ATM OVER ADSL..............................................................................................................9 3.1. GENERAL.........................................................................................................................................................9 3.2. CHANNELIZATION............................................................................................................................................9 3.3. DYNAMIC RATE CHANGE BEHAVIOR..............................................................................................................9 4. QUALITY OF SERVICE (QOS)......................................................................................................................10 4.1. DATA RATES .................................................................................................................................................10 4.2. BIT ERROR RATIO (BER).............................................................................................................................10 4.3. LATENCY .......................................................................................................................................................10 4.4. TRAFFIC MANAGEMENT FOR ATM OVER ADSL .........................................................................................10 5. DESCRIPTION OF FUNCTIONAL BLOCKS...............................................................................................11 5.1. ACCESS NODE ..............................................................................................................................................11 5.1.1. Core ATM Network Interface Element ...........................................................................................11 5.1.2. VPI/VCI Translation and Higher-Layer Function .........................................................................12 5.1.3. ATU-C.................................................................................................................................................12 5.2. BROADBAND NETWORK TERMINATION (B-NT)...........................................................................................13 5.2.1. ATU-R.................................................................................................................................................14 5.2.2. ATM Layer.........................................................................................................................................14 5.2.3. PDN/TE Interface Element ...............................................................................................................15 5.2.4. AAL Function.....................................................................................................................................15 6. SIGNALING.......................................................................................................................................................15 6.1. ATM FORUM SIGNALING ..............................................................................................................................15 6.1.1. Signaling at the U, T, and S Interfaces.............................................................................................15 6.1.2. Signaling at the V Interface ..............................................................................................................15 6.1.2.1. The ATM Inter-Network Interface (AINI).................................................................................16 6.1.2.2. The ATM User-Network Interface (UNI) ...................................................................................16 6.2. ITU-T SIGNALING .........................................................................................................................................16 6.2.1. Signaling at the U, T, and S Interfaces.............................................................................................16 6.2.2. Signaling at the V Interface ..............................................................................................................16 7. MANAGEMENT ................................................................................................................................................16 7.1. GENERAL.......................................................................................................................................................16 7.2. NETWORK MANAGEMENT AT THE U, S, AND T INTERFACES .......................................................................17 7.3. NETWORK MANAGEMENT ACROSS THE V INTERFACE.................................................................................17 7.4. OPERATION, ADMINISTRATION AND MAINTENANCE (OAM)........................................................................17 7.4.1 Minimum requirements fault management ITU-T I.610 CPE for residential use.......................17 7.4.2