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Network Working Group                                       T. Dreibholz
Internet-Draft                                                  M. Becke
Intended status: Experimental               University of Duisburg-Essen
Expires: April 28, 2012                                 October 26, 2011


      SCTP Socket API Extensions for Concurrent Multipath Transfer
           draft-dreibholz-tsvwg-sctpsocket-multipath-02.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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   Internet-Drafts are draft documents valid for a maximum of six months
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   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 April 28, 2012.

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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   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, CMT/RPv2-SCTP and MPTCP-like (see
   [I-D.tuexen-tsvwg-sctp-multipath], [Globecom2010], [PAMS2011],
   [SoftCOM2011], [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.

      4  Turns CMT-SCTP on.  MPTCP-like Resource Pooling as defined in
         [SoftCOM2011], [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-32 (work in progress),
              October 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-02 (work in progress),
              July 2011.

6.2.  Informative References

   [SoftCOM2011]
              Dreibholz, T., Becke, M., Adhari, H., and E. Rathgeb,
              "Evaluation of A New Multipath Congestion Control Scheme
              using the NetPerfMeter Tool-Chain", Proceedings of the
              19th IEEE International Conference on Software,
              Telecommunications and Computer
              Networks (SoftCOM), ISBN 978-953-290-027-9,
              September 2011.

   [PAMS2011]
              Adhari, H., Dreibholz, T., Becke, M., Rathgeb, E., and M.
              Tuexen, "Evaluation of Concurrent Multipath Transfer over
              Dissimilar Paths", Proceedings of the 1st International
              Workshop on Protocols and Applications with Multi-Homing
              Support (PAMS), Pages 708-714, ISBN 978-0-7695-4338-3,



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              DOI 10.1109/WAINA.2011.92, March 2011.

   [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), Pages 397-404, ISBN 978-953-
              184-152-8, June 2011.

   [AINA2010]
              Dreibholz, T., Becke, M., Pulinthanath, J., and E.
              Rathgeb, "Applying TCP-Friendly Congestion Control to
              Concurrent Multipath Transfer", Proceedings of the 24th
              IEEE International Conference on Advanced Information
              Networking and Applications (AINA), Pages 312-319,
              ISSN 1550-445X, DOI 10.1109/AINA.2010.117, April 2010.

   [Globecom2010]
              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), ISBN 978-1-4244-5637-6,
              DOI 10.1109/GLOCOM.2010.5683579, December 2010.

   [IAS2006]  Iyengar, J., Amer, P., and R. Stewart, "Concurrent
              Multipath Transfer Using SCTP Multihoming Over Independent
              End-to-End Paths", IEEE/ACM Transactions on
              Networking, Volume 14, Number 5, Pages 951-964, ISSN 1063-
              6692, DOI 10.1109/TNET.2006.882843, 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/







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   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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