1. A Common Framework for Autoconfiguration
IETF-65 Autoconf WG
A Common Framework for Autoconfiguration
of Stand-Alone Ad Hoc Networks
Draft-mase-autoconf-framework-01
　　　　　　　　　　　　　　　　 　　　　　　　　
Kenichi Mase, Niigata University
Cedric Adjih, INRIA
March 23, 2006
Niigata University

2. 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.
Niigata University

3. The major change from ver.00
The 00 version has two state-transition diagrams, one for proactive and the other for reactive routing protocols.
The 01 version has a common state-transition diagram both for proactive and reactive routing protocols.
Niigata University

4. Basic Terminologies (1)
Tentative address – an address whose uniqueness in a MANET is being verified, prior to its assignment to an interface.
Address generation – a procedure for a node, that has currently no address, to obtain a tentative address in the MANET.
(RFC2461/2462)
Niigata University

5. Basic Terminologies (2)
MANET-wide Duplicate Address Detection (MANET-DAD) – The action of detecting address conflict in the MANET.
Pre-Service MANET-DAD – verify that a tentative address is out of address conflict with other MANET nodes.
In-Service MANET-DAD – continuously verify that a used address is out of address conflict with other MANET nodes.
Niigata University

6. 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
Niigata University

7. Duplicate address detected NO_ADDRESS _STATE NORMAL _STATE
(Address generation)
(In-service MANET-DAD)
Duplicate address detected
NO_ADDRESS _STATE
NORMAL _STATE
Full routing
Duplicate address detected
Tentative address generated
Time-out
ADVERTISING_STATE
LOCAL_AD _STATE
Time-out
GLOBAL_AD _STATE
(Pre-service MANET-DAD)
No forwarding
Fig.1 Autoconfiguration state transition diagram.
Niigata University