FMIPv6 on Point-to-Point Link

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FMIPv6 on Point-to-Point Link

• Frank Xia
• Behcet Sarikaya
• March 2007

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Problem Statement -1

• Shared Link
• All MSs attached to an AR share one or more
  prefixes
• for constructing their global IPv6 addresses
• Point-to-Point Link
• Each link between an MS and the AR is allocated
  a
• separate, unique prefix or a set of unique
  prefixes by
• the AR

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Problem Statement - 2

• FMIPv6 is based on shared link model
• MN formulates prospective NCoA using prefixes on
  the physical interface to which the new access
  point is attached

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Problem Statement - 3

• Physical prefix cant be used by MN for
  formulating NCoA in a Point-to-Point link
• It is very difficult to formulate NCoA in
  Point-to-Point link
• -Prefixes for MNs NCoA are allocated dynamically
• -PAR cant get prefixes from NAR for MNs
  formulation of NCoA easily

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Proposed Solution -1

• Aggregate Prefix
• In Point-to-Point Link Model, AR should
  broadcast the prefixes (MNs route information)
  dynamically upstream, and this causes high
  routing protocol traffic ( OSPF, etc.). To solve
  the problem, route aggregation should be used.
  For example, each AR can be assigned a /48
  prefix, while an MN's /64 prefix is derived from
  the /48 prefix extension. The main, higher-level
  prefix is called the Aggregate Prefix. An AR
  only broadcasts the aggregate prefix
• Dedicated Prefix
• The prefix derived from the aggregate prefix
  and allocated for an MN
• Provisional NCoA
• NCoA obtained from the aggregate prefix
• Modified NCoA
• NCoA obtained from the dedicated prefix

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Proposed Solution - 2

• In FMIPv6 Predictive Mode Scenario
• Step 1 PAR advertises Aggregate Prefix to MN
  in PrRtAdv
• Step 2 MN formulates a provisional NCoA using
  Aggregate Prefix
• Step 3 MN sends FBU to PAR with Provisional
  NCoA
• Step 4 PAR sends HI to NAR with Provisonal
  NCoA
• Step 5 NAR allocates dedicated prefix to MN
  generates a new NCoA, and replies with HAck
  containing the new (modified) NCoA
• Step 6 The modified NCoA is delivered to MN
  through PAR, and MN MUST use the modified NCoA

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Next Steps
What does WG think about the problem?
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Thank You. Questions?