The China Mobile, Huawei, and ZTE BNG Simple Control and User Plane Separation Protocol (S-CUSP)
draft-chz-simple-cu-separation-bng-protocol-00

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Network Working Group                                              S. Hu
Internet-Draft                                              China Mobile
Intended status: Informational                               D. Eastlake
Expires: December 5, 2019                                        M. Chen
                                                     Huawei Technologies
                                                                  F. Qin
                                                                   Z. Li
                                                            China Mobile
                                                                 T. Chua
                                    Singapore Telecommunications Limited
                                                                D. Huang
                                                                     ZTE
                                                           June 03, 2019

  The China Mobile, Huawei, and ZTE BNG Simple Control and User Plane
                      Separation Protocol (S-CUSP)
             draft-chz-simple-cu-separation-bng-protocol-00

Abstract

   To support Control Plane (CP) and User Plane (UP) Separation (CUPS)
   for fixed network Broadband Network Gateway (BNG) service providers,
   China Mobile, Huawei Technologies, and ZTE have developed a simple
   CUPS control channel Protocol (S-CUSP).  This document is intended to
   make the S-CUSP specification conveniently available to the Internet
   community.

Status of This Memo

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   This Internet-Draft will expire on November 24, 2019.

Hu, et al.              Expires November 24, 2019               [Page 1]
Internet-Draft               S-CUSP for BNG                     May 2019

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   document authors.  All rights reserved.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   5
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   5
   3.  BNG CUPS Overview . . . . . . . . . . . . . . . . . . . . . .   8
     3.1.  BNG CUPS Motivation . . . . . . . . . . . . . . . . . . .   8
     3.2.  BNG CUPS Architecture Overview  . . . . . . . . . . . . .   8
     3.3.  BNG CUPS Interfaces . . . . . . . . . . . . . . . . . . .  10
       3.3.1.  Service Interface . . . . . . . . . . . . . . . . . .  11
       3.3.2.  Management Interface  . . . . . . . . . . . . . . . .  11
       3.3.3.  Control Interface . . . . . . . . . . . . . . . . . .  11
     3.4.  BNG CUPS Procedure Overview . . . . . . . . . . . . . . .  12
   4.  S-CUSP Protocol Overview  . . . . . . . . . . . . . . . . . .  14
     4.1.  Control Channel Related Procedures  . . . . . . . . . . .  14
       4.1.1.  S-CUSP Session Establishment  . . . . . . . . . . . .  14
       4.1.2.  Keep Alive  . . . . . . . . . . . . . . . . . . . . .  16
     4.2.  Node Related Procedures . . . . . . . . . . . . . . . . .  16
       4.2.1.  UP Board and Interface Status Report  . . . . . . . .  16
       4.2.2.  Enable BAS Function on Access Interface . . . . . . .  17
       4.2.3.  Advertise Subscriber Network Routing  . . . . . . . .  17
       4.2.4.  CGN Public IP Address Allocation  . . . . . . . . . .  18
       4.2.5.  Data Synchronization Between CP and UP  . . . . . . .  19
     4.3.  Subscriber Session Related Procedures . . . . . . . . . .  20
       4.3.1.  Create Subscriber Session . . . . . . . . . . . . . .  21
       4.3.2.  Update Subscriber Session . . . . . . . . . . . . . .  22
       4.3.3.  Delete Subscriber Session . . . . . . . . . . . . . .  23
       4.3.4.  Subscriber Session Events Report  . . . . . . . . . .  23
   5.  S-CUSP Call Flows . . . . . . . . . . . . . . . . . . . . . .  24
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