RFC 3807 (rfc3807) - Page 2 of 24

V5

RFC 3807           V5.2-User Adaptation Layer (V5UA)           June 2004


Table of Contents

   1.  Introduction .................................................  2
       1.1.  Scope ..................................................  3
       1.2.  Terminology ............................................  3
       1.3.  V5.2 Overview ..........................................  5
       1.4.  Distribution of responsibilities between MGC and SG ....  7
       1.5.  Client/Server Model ....................................  7
       1.6.  Addition to boundary primitives ........................  7
             1.6.1.  V5 specific boundary primitives ................  7
   2.  Conventions ..................................................  9
   3.  SCTP Stream Management ....................................... 10
   4.  Proposed V5.2 Backhaul Architecture .......................... 10
       4.1.  V5UA Message Header .................................... 11
       4.2.  V5 Naming Conventions for Interface Identifier ......... 12
       4.3.  V5 Additions to IUA Boundary Primitives ................ 13
       4.4.  Link Status Messages ................................... 14
       4.5.  Sa-Bit Messages ........................................ 16
       4.6.  Error Indication Message ............................... 17
   5.  Procedures ................................................... 18
       5.1.  V5 Layer 1 failure ..................................... 18
       5.2.  Loss of V5UA peer ...................................... 19
       5.3.  C-channel overload on SG ............................... 19
   6.  Examples ..................................................... 20
       6.1.  Link Identification Procedure (successful) ............. 20
   7.  Security Considerations ...................................... 21
   8.  IANA Considerations .......................................... 21
       8.1.  SCTP Payload Protocol Identifier ....................... 21
       8.2.  V5UA Port Number ....................................... 22
   9.  Acknowledgements ............................................. 22
   10. References ................................................... 22
       10.1. Normative References ................................... 22
       10.2. Informative References ................................. 23
   11. Authors' Addresses ........................................... 23
   12. Full Copyright Statement ..................................... 24

1.  Introduction

   This document describes a method of implementing V5.2 backhaul
   messaging over IP using a modified version of the ISDN User
   Adaptation Layer Protocol (IUAP) [1].  V5UA builds on top of IUA,
   defining the necessary extensions to IUA for a V5.2 implementation.

   Since V5UA is meant to be an extension to IUAP, everything defined in
   [1] is also valid for V5UA unless otherwise specified in this
   document.





Weilandt, et al.            Standards Track