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lpwan Working Group                                          A. Minaburo
Internet-Draft                                                    Acklio
Intended status: Informational                                  E. Ramos
Expires: September 6, 2018                                      Ericsson
                                                       S. Shanmugalingam
                                                                  Acklio
                                                          March 05, 2018


       LPWAN Static Context Header Compression (SCHC) over NB-IoT
                    draft-minaburo-lpwan-nbiot-hc-00

Abstract

   The Static Context Header Compression (SCHC) specification describes
   a header compression and fragmentation functionalities for LPWAN (Low
   Power Wide Area Networks) technologies.  SCHC was designed to be
   adapted over any of the LPWAN technologies.

   This document describes the use of SCHC over the NB-IoT channels, and
   provides elements for an efficient parameterization.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   Internet-Drafts are draft documents valid for a maximum of six months
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   This Internet-Draft will expire on September 6, 2018.

Copyright Notice

   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents



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   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Architecture  . . . . . . . . . . . . . . . . . . . . . . . .   3
     3.1.  The Control Plane . . . . . . . . . . . . . . . . . . . .   3
     3.2.  The Data Plane  . . . . . . . . . . . . . . . . . . . . .   3
     3.3.  SCHC entities . . . . . . . . . . . . . . . . . . . . . .   4
     3.4.  NB-IoT Channels . . . . . . . . . . . . . . . . . . . . .   4
   4.  Static Context Header Compression . . . . . . . . . . . . . .   4
     4.1.  SCHC Rules  . . . . . . . . . . . . . . . . . . . . . . .   4
       4.1.1.  Rule ID . . . . . . . . . . . . . . . . . . . . . . .   4
     4.2.  Packet processing . . . . . . . . . . . . . . . . . . . .   4
     4.3.  SCHC Context  . . . . . . . . . . . . . . . . . . . . . .   4
   5.  Fragmentation . . . . . . . . . . . . . . . . . . . . . . . .   4
     5.1.  Fragmentation modes . . . . . . . . . . . . . . . . . . .   4
     5.2.  Fragmentation Parameters  . . . . . . . . . . . . . . . .   5
   6.  Padding . . . . . . . . . . . . . . . . . . . . . . . . . . .   5
   7.  Security considerations . . . . . . . . . . . . . . . . . . .   5
   8.  3GPP References . . . . . . . . . . . . . . . . . . . . . . .   5
   9.  Informative References  . . . . . . . . . . . . . . . . . . .   5
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   6

1.  Introduction

   The Static Context Header Compression (SCHC)
   [I-D.ietf-lpwan-ipv6-static-context-hc] defines a header compression
   scheme and fragmentation functionality, both specially tailored for
   Low Power Wide Area Networks (LPWAN) networks defined in
   [I-D.ietf-lpwan-overview].

   Header compression is needed to efficiently bring Internet
   connectivity to the node within an NB-IoT network.  SCHC uses an
   static context to performs header compression with specific
   parameters that need to be adapted into the NB-IoT channels.

   This document describes the use of SCHC and its parametrizing over
   the NB-IoT channels.







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2.  Terminology

   This document will follow the terms defined in
   [I-D.ietf-lpwan-ipv6-static-context-hc], in
   [I-D.ietf-lpwan-overview], and the (TGPP23720).

   o  UE.  User Equipment

   o  eNB.  Node B.  Base Station that controls the UE

   o  MME.  Mobility Management Entity.  Handle mobility of the UE

   o  S-GW.  Serving Gateway.  Routes and forwards the user data packets
      through the access network

   o  HSS.  Home Subscriber Server.  It is a database that performs
      mobility management

   o  P-GW.  Packet Data Node Gateway.  Interface between the internal
      with the external network

   TBD

3.  Architecture

     +--+
      |UE| \              +------+      +------+
      +--+  \             | MME  |------| HSS  |
             \          / +------+      +------+
      +--+    \+-----+ /      |
      |UE| ----| eNB |-       |
      +--+    /+-----+ \      |
             /          \ +--------+
            /            \|        |    +------+     Service PDN
      +--+ /              |  S-GW  |----| P-GW |---- e.g. Internet
      |UE|                |        |    +------+
      +--+                +--------+


3.1.  The Control Plane

3.2.  The Data Plane

   TDB







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3.3.  SCHC entities

   TBD

3.4.  NB-IoT Channels

   (Rule ID on L2)

   TBD

4.  Static Context Header Compression

   TBD

4.1.  SCHC Rules

   TBD

4.1.1.  Rule ID

   The Rule ID the SCHC identifies are: * In the SCHC C/D context the
   Rule used to keep the Field Description of the header packet.

   o  In SCHC Fragmentation the specific modes and settings.

   o  And at least one Rule ID may be reserved to the case where no SCHC
      C/D nor SCHC fragmentation were possible.

   TBD

4.2.  Packet processing

   TBD

4.3.  SCHC Context

   TBD

5.  Fragmentation

   ## Fragmentation Headers TBD

5.1.  Fragmentation modes

   TBD






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5.2.  Fragmentation Parameters

   o  Rule ID

   o  DTag

   o  FCN

   o  Retransmission Timer

   o  Inactivity Timer

   o  MAX_ACK_Retries

   o  MAX_ATTEMPS

   TBD

6.  Padding

   TBD

7.  Security considerations

   3GPP access security is specified in (TGPP33203).

8.  3GPP References

   o  TGPP23720 3GPP, "TR 23.720 v13.0.0 - Study on architecture
      enhancements for Cellular Internet of Things", 2016.

   o  TGPP33203 3GPP, "TS 33.203 v13.1.0 - 3G security; Access security
      for IP-based services", 2016.

9.  Informative References

   [I-D.ietf-lpwan-ipv6-static-context-hc]
              Minaburo, A., Toutain, L., and C. Gomez, "LPWAN Static
              Context Header Compression (SCHC) and fragmentation for
              IPv6 and UDP", draft-ietf-lpwan-ipv6-static-context-hc-10
              (work in progress), February 2018.

   [I-D.ietf-lpwan-overview]
              Farrell, S., "LPWAN Overview", draft-ietf-lpwan-
              overview-10 (work in progress), February 2018.






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Authors' Addresses

   Ana Minaburo
   Acklio
   2bis rue de la Chataigneraie
   35510 Cesson-Sevigne Cedex
   France

   Email: ana@ackl.io


   Edgar Ramos
   Ericsson
   Stockholm
   Stockholm
   Sweden

   Email: edgar.ramos@ericsson.com


   Sivasothy Shanmugalingam
   Acklio
   2bis rue de la Chataigneraie
   35510 Cesson-Sevigne Cedex
   France

   Email: sothy@ackl.io
























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