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Candidate Access Router Discovery (CARD) (RFC4066)

IP.com Disclosure Number: IPCOM000126206D
Original Publication Date: 2005-Jul-01
Included in the Prior Art Database: 2005-Jul-07

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

M. Liebsch: AUTHOR [+7]

Abstract

To enable seamless IP-layer handover of a mobile node (MN) from one access router (AR) to another, the MN is required to discover the identities and capabilities of candidate ARs (CARs) for handover prior to the initiation of the handover. The act of discovery of CARs has two aspects: identifying the IP addresses of the CARs and finding their capabilities. This process is called "candidate access router discovery" (CARD). At the time of IP-layer handover, the CAR, whose capabilities are a good match to the preferences of the MN, is chosen as the target AR for handover. The protocol described in this document allows a mobile node to perform CARD.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 2% of the total text.

Network Working Group                                    M. Liebsch, Ed.
Request for Comments: 4066                                 A. Singh, Ed.
Category: Experimental                                        H. Chaskar
                                                               D. Funato
                                                                 E. Shim
                                                               July 2005


                Candidate Access Router Discovery (CARD)

Status of This Memo

   This memo defines an Experimental Protocol for the Internet
   community.  It does not specify an Internet standard of any kind.
   Discussion and suggestions for improvement are requested.
   Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2005).

Abstract

   To enable seamless IP-layer handover of a mobile node (MN) from one
   access router (AR) to another, the MN is required to discover the
   identities and capabilities of candidate ARs (CARs) for handover
   prior to the initiation of the handover.  The act of discovery of
   CARs has two aspects: identifying the IP addresses of the CARs and
   finding their capabilities.  This process is called "candidate access
   router discovery" (CARD).  At the time of IP-layer handover, the CAR,
   whose capabilities are a good match to the preferences of the MN, is
   chosen as the target AR for handover.  The protocol described in this
   document allows a mobile node to perform CARD.

Table of Contents

   1.  Introduction..................................................  2
   2.  Terminology...................................................  3
   3.  CARD Protocol Functions.......................................  4
       3.1.  Reverse Address Translation.............................  4
       3.2.  Discovery of CAR Capabilities...........................  4
   4.  CARD Protocol Operation.......................................  4
       4.1.  Conceptual Data Structures..............................  7
       4.2.  Mobile Node - Access Router Operation...................  8
       4.3.  Current Access Router - Candidate Access Router
             Operation............................................... 11
       4.4.  CARD Protocol Message Piggybacking on the MN-AR
             Interface............................................... 13

Liebsch, et al.               Experimental                      [Page 1]
RFC 4066        Candidate Access Router Discovery (CARD)       J...