July 12, 2006

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IETF-66 Autoconf WG
A Common Framework for Autoconfiguration of
Stand-Alone Ad Hoc Networks
Draft-mase-autoconf-framework-02, June 8, 2006

Kenichi Mase, Niigata University Cedric Adjih,
INRIA
July 12, 2006
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The major change from ver.01

• A concept of duplicate address advertisement
  (DAA) is newly incorporated.
• The redundant descriptions are removed.

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A concept of DAA
A
B
Duplicate address detected
C
Detect duplicate address ? Advertise
detected
duplicate address
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The baselines of the framework

• Each node SHOULD perform pre-service MANET DAD
  and in-service MANET-DAD, before and after
  address assignment, respectively.
• A node, that detects duplicate address between
  other nodes, SHOULD perform MANET-DAA.
• Pre-service MANET-DAD, in-service MANET-DAD and
  MANET-DAA functions could be embedded in routing
  control messages regardless of whether reactive
  or proactive routing protocol is employed

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Appendix
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Aims

• Autoconfiguration of unique local address for a
  stand-alone MANET.
• Not a solution, but a common framework.
• Background
• Address compression can be used in MANET routing
  protocol.
• The smaller the host address space, the greater
  the benefit of the address compression.
• Duplicated address detection is indispensable
  when host address space is limited.

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MANET-DAD Interaction between Nodes
NO_ADDRESS_STATE
ADVERTISING_STATE (Pre-service MANET-DAD)
NORMAL_STATE (In-service MANET-DAD)
Node A (New comer)
Time
Tentative address generated
Address assigned
Node B (Existing node)
Time
NORMAL-STATE (In-service MANET-DAD)

• Generalized routing control messages can be used
  both for pre-service and
• in-service MANET-DAD
• Nodes in ADVERTISING-STATE and those in
  NORMAL-STATE can interact
• to each other with regard to MANET-DAD

Benefits

• Minimize MANET-DAD overhead
• Minimize erroneous route formulation

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(Address generation)
(In-service MANET-DAD)
Duplicate address detected
NORMAL_STATE
NO_ADDRESS_STATE
Full routing
Duplicate address detected
Tentative addressgenerated
Time-out
ADVERTISING_STATE
LOCAL_AD_STATE
GLOBAL_AD_STATE
Time-out
(Pre-service MANET-DAD)
No forwarding
Fig.1 Autoconfiguration state transition diagram.