Transient Binding for Proxy Mobile IPv6
RFC 6058

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Internet Engineering Task Force (IETF)                   M. Liebsch, Ed.
Request for Comments: 6058                                           NEC
Category: Experimental                                        A. Muhanna
ISSN: 2070-1721                                                 Ericsson
                                                                O. Blume
                                                Alcatel-Lucent Bell Labs
                                                              March 2011

                Transient Binding for Proxy Mobile IPv6

Abstract

   This document specifies a mechanism that enhances Proxy Mobile IPv6
   protocol signaling to support the creation of a transient binding
   cache entry that is used to optimize the performance of dual radio
   handover, as well as single radio handover.  This mechanism is
   applicable to the mobile node's inter-MAG (Mobility Access Gateway)
   handover while using a single interface or different interfaces.  The
   handover problem space using the Proxy Mobile IPv6 base protocol is
   analyzed and the use of transient binding cache entries at the local
   mobility anchor is described.  The specified extension to the Proxy
   Mobile IPv6 protocol ensures optimized forwarding of downlink as well
   as uplink packets between mobile nodes and the network infrastructure
   and avoids superfluous packet forwarding delay or even packet loss.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for examination, experimental implementation, and
   evaluation.

   This document defines an Experimental Protocol for the Internet
   community.  This document is a product of the Internet Engineering
   Task Force (IETF).  It represents the consensus of the IETF
   community.  It has received public review and has been approved for
   publication by the Internet Engineering Steering Group (IESG).  Not
   all documents approved by the IESG are a candidate for any level of
   Internet Standard; see Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc6058.

Liebsch, et al.               Experimental                      [Page 1]
RFC 6058         Transient Binding for Proxy Mobile IPv6      March 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
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   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.

Liebsch, et al.               Experimental                      [Page 2]
RFC 6058         Transient Binding for Proxy Mobile IPv6      March 2011

Table of Contents

   1. Introduction ....................................................4
   2. Conventions and Terminology .....................................5
      2.1. Conventions Used in This Document ..........................5
      2.2. Terminology and Functional Components ......................5
   3. Analysis of the Problem Space ...................................6
      3.1. Handover Using a Single Interface ..........................6
      3.2. Handover between Interfaces ................................6
           3.2.1. Issues with Downlink Traffic ........................7
           3.2.2. Issues with Uplink Traffic ..........................9
      3.3. Need for a Common Solution ................................10
   4. Use of Transient Binding Cache Entries .........................11
      4.1. General Approach ..........................................11
      4.2. Impact on Binding Management ..............................13
      4.3. Role of the LMA and nMAG in Transient State Control .......14
           4.3.1. Control at the nMAG ................................14
           4.3.2. Control at the LMA .................................15
      4.4. LMA Forwarding State Diagram ..............................15
      4.5. MAG Operation .............................................18
      4.6. LMA Operation .............................................19
           4.6.1. Initiation of a Transient BCE ......................19
           4.6.2. Activation of a Transient BCE ......................20
      4.7. MN Operation ..............................................22
      4.8. Status Values .............................................22
      4.9. Protocol Stability ........................................22