NEMO RO Problem Statement and Analysis <draft-zhao-nemo-ro-ps-00>

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NEMO RO Problem Statement and Analysisltdraft-zhao
-nemo-ro-ps-00gt

• Fan Zhao, S. Felix Wu, Souhwan Jung
• Fanzhao_at_ucdavis.edu

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Outline

• NEMO RO scenarios
• Terminology
• NEMO RO problem statement
• NEMO RO problem analysis
• NEMO RO solution space analysis
• Summary

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Scenario 1 CN is in the infrastructure
MIP6 RO
NEMO RO
BU
HA
HA1
RO
Internet
Internet
CN
RO
CN
BU
HA2
AR
AR
full binding info ?
partial binding info
CoA
MR1
MN
CoA2
MR2
RO the full binding information between location
and node is needed.
MNN
MNN
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Scenario2 CN is in the NEMO network
1. The solution to the scenario 1 could work in
the scenario 2 without large modification. 2. RO
The full binding information is still needed in
the scenario 2.
Internet
AR
AR
MR0
?
MR3
MR1
MR1
MR3
MR4
MR2
MR2
MR4
LFN2
LFN1
LFN1
LFN2
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Terminology

• Correspondent Agent (CA)
• A NEMO_enable entity (router or host) forwarding
  the traffic for CN
• The peer of MR when signaling the binding
  information
• Could be CN or CR (HA in some sense).
• Does not intend to replace CN or CR, but used to
  describe the NEMO RO problem.

HA
Internet
MR
AR
CN1
MNN
CA
CR
CN2
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Why CA is introduced?

• The current related terms are not sufficient in
  the context of NEMO RO.
• CR is explicitly defined as a router.
• CN is defined from the perspective of
  communication (data or signaling message?), not
  specific in the context of NEMO RO.
• CA is introduced
• to abstract the differences between CR and CN,
  thus to facilitate the description of NEMO RO
  problem.
• to emphasize on CNs capability of NEMO RO
  support, thus avoids the confusion that the same
  node is the CN of both MR and one of MNNs behind
  that MR.
• NEMO Basic Support and NEMO RO Support can be
  seamlessly unified under the term of CA.

CN
MNN
CR
MR
Internet

CA
CN
MNN
MR
MR
CN

MNN
MNN
CN
CA
MR
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Terminology

• Anchor Point (AP)
• Knowing at least partial binding information of a
  node/network
• Capable of forwarding the data packets destined
  for a host to its location directly.
• The Internet router changes into such kind of AP
  by running routing protocols.
• In NEMO network, the set of APs for a specific
  MNP includes MR and its HA (after BU) as well as
  CA (after RO).
• The closer to MR or CA AP is, the more optimal
  route.

BU
Internet
RO
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NEMO RO problem statement

• NEMO RO problem
• The traffic to or from the nested NEMO network
  goes through multiple HAs
• Other consequences resulted from this
  unnecessarily long route
• The optimal route and non-optimal route are
  described
• in two typical scenarios (More complicated
  scenarios can be deduced into these two.)
• with multi-homing issues in mind
• The limitations of NEMO Basic Support protocol
• Reverse tunneling
• HA as the only globally available AP
• Incomplete information about the next hop when
  forwarding inside the nested NEMO network
• Data plane based method
• The overhead of data payload and processing due
  to bi-directional tunneling

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NEMO RO problem analysis

• NEMO network formalization
• Multi-homing and/or nested NEMO network.
• The related tradeoffs
• Data plane method vs. signaling plane method
• Optimization vs. the scalability issue in MR, CA
  and HA
• Optimization vs. the scope of change
• Location privacy vs. optimal route
• Security vs. optimal route
• Scalability vs. reliability
• The current draft analyzes the tradeoffs in an
  abstract fashion, but it can be easily applied to
  analyze each potential solution.

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NEMO RO solution space analysis

• NEMO RO solution
• makes AP close to either CN or MNN
• Achieves the full binding information and informs
  AP about it
• Solution space analysis
• ltfrom, to, initiator, method, othersgt
• From the source of binding information, either
  MR or HA
• To the destination of binding information, CA or
  the infrastructure AR or other MRs inside the
  (nested) NEMO
• Initiator either from or to, the solicitor of
  the binding information
• Method the one used to achieve the full binding
  information and inform AP about it. The proposed
  methods includes keeping a chain of CoAs in one
  data packet, prefix delegation, and information
  aggregation from multiple packets.
• Others other possible elements, which depends on
  how deep the solution space analysis should be.
• The advantages
• Towards a complete solution space exploration.
• To discover more new solutions as the solution
  space is big.

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Summary

• The draft describes and analyzes the NEMO RO
  problem based on the rigorously defined terms
  specific in the context of NEMO RO and the
  reasonable assumptions.
• The draft explores the related tradeoffs and
  describes a way to formalize the potentially very
  complicated NEMO network in order to help the
  problem analysis.
• The draft will be updated to reflect the recent
  thoughts and feedbacks.

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Questions?