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Network Working Group                                       T. Dreibholz
Internet-Draft                                                  M. Becke
Intended status: Experimental               University of Duisburg-Essen
Expires: November 6, 2011                                   May 05, 2011


      SCTP Socket API Extensions for Concurrent Multipath Transfer
           draft-dreibholz-tsvwg-sctpsocket-multipath-01.txt

Abstract

   This document describes extensions to the SCTP sockets API for
   configuring the CMT-SCTP and CMT/RP-SCTP extensions.

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
   Task Force (IETF).  Note that other groups may also distribute
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   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on November 6, 2011.

Copyright Notice

   Copyright (c) 2011 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
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   (http://trustee.ietf.org/license-info) in effect on the date of
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   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.






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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . . 3
   2.  Concurrent Multipath Transfer and Resource Pooling
       Activation/Deactivation (SCTP_CMT_ON_OFF) . . . . . . . . . . . 3
   3.  Security Considerations . . . . . . . . . . . . . . . . . . . . 3
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 4
   5.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . 4
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . . . 4
     6.1.  Normative References  . . . . . . . . . . . . . . . . . . . 4
     6.2.  Informative References  . . . . . . . . . . . . . . . . . . 4
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . . . 5







































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1.  Introduction

   This draft describes extensions to the SCTP sockets API (see
   [I-D.ietf-tsvwg-sctpsocket], [RFC4960]) which allow an application to
   configure the behaviour of the Concurrent Multipath Transfer (CMT)
   extensions CMT-SCTP, CMT/RPv1-SCTP and CMT/RPv2-SCTP (see
   [I-D.tuexen-tsvwg-sctp-multipath], [Globecom2010], [ConTEL2011],
   [AINA2010], [IAS2006]).


2.  Concurrent Multipath Transfer and Resource Pooling Activation/
    Deactivation (SCTP_CMT_ON_OFF)

   This socket option activates or deactivates CMT and sets the
   corresponding Resource Pooling variant to be applied.  The
   sctp_assoc_value structure is used to specify the association for
   which the CMT state should be changed and the new CMT state.

   Definition of the sctp_assoc_value structure:

   struct sctp_assoc_value {
      sctp_assoc_t assoc_id;
      uint32_t     assoc_value;
   };

   assoc_id:  Holds the identifier for the association of which the CMT
      state should be changed.  Ignored for one-to-one style sockets.

   assoc_value:

      0  Turns CMT off.

      1  Turns plain CMT-SCTP on.  No Resource Pooling is applied.

      2  Turns CMT-SCTP on.  CMT/RPv1 Resource Pooling as defined in
         [AINA2010] is applied.

      3  Turns CMT-SCTP on.  CMT/RPv2 Resource Pooling as defined in
         [ConTEL2011] is applied.


3.  Security Considerations

   Security considerations for the SCTP sockets API are described by
   [I-D.ietf-tsvwg-sctpsocket].






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4.  IANA Considerations

   This document does not require IANA actions.


5.  Acknowledgments

   The authors would like to thank Michael Tuexen for his support.


6.  References

6.1.  Normative References

   [RFC4960]  Stewart, R., "Stream Control Transmission Protocol",
              RFC 4960, September 2007.

   [I-D.ietf-tsvwg-sctpsocket]
              Stewart, R., Tuexen, M., Poon, K., Lei, P., and V.
              Yasevich, "Sockets API Extensions for Stream Control
              Transmission Protocol (SCTP)",
              draft-ietf-tsvwg-sctpsocket-29 (work in progress),
              April 2011.

   [I-D.tuexen-tsvwg-sctp-multipath]
              Becke, M., Dreibholz, T., Iyengar, J., Natarajan, P., and
              M. Tuexen, "Load Sharing for the Stream Control
              Transmission Protocol (SCTP)",
              draft-tuexen-tsvwg-sctp-multipath-01 (work in progress),
              December 2010.

6.2.  Informative References

   [ConTEL2011]
              Dreibholz, T., Becke, M., Adhari, H., and E. Rathgeb, "On
              the Impact of Congestion Control for Concurrent Multipath
              Transfer on the Transport Layer", Proceedings of the 11th
              IEEE International Conference on
              Telecommunications (ConTEL), April 2011.

   [AINA2010]
              Dreibholz, T., Becke, M., Pulinthanath, J., and E.
              Rathgeb, "Applying TCP-Friendly Congestion Control to
              Concurrent Multipath Transfer", Proceedings of the IEEE
              24th International Conference on Advanced Information
              Networking and Applications (AINA), April 2010.

   [Globecom2010]



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              Dreibholz, T., Becke, M., Rathgeb, E., and M. Tuexen, "On
              the Use of Concurrent Multipath Transfer over Asymmetric
              Paths", Proceedings of the IEEE Global Communications
              Conference (GLOBECOM), December 2010.

   [IAS2006]  Iyengar, J., Amer, P., and R. Stewart, "Concurrent
              Multipath Transfer Using SCTP Multihoming Over Independent
              End-to-End Paths", Journal IEEE/ACM Transactions on
              Networking, October 2006.


Authors' Addresses

   Thomas Dreibholz
   University of Duisburg-Essen, Institute for Experimental Mathematics
   Ellernstrasse 29
   45326 Essen, Nordrhein-Westfalen
   Germany

   Phone: +49-201-1837637
   Fax:   +49-201-1837673
   Email: dreibh@iem.uni-due.de
   URI:   http://www.iem.uni-due.de/~dreibh/


   Martin Becke
   University of Duisburg-Essen, Institute for Experimental Mathematics
   Ellernstrasse 29
   45326 Essen, Nordrhein-Westfalen
   Germany

   Phone: +49-201-183-7667
   Fax:   +49-201-183-7673
   Email: martin.becke@uni-due.de

















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