Transcript A Fast Handoff Mechanism Using The Neighbor FA Information

Proactive Approach for DNA
- Preliminary Overview -
March 2, 2004
Eunsoo Shim
Kyungtae Kim
Jens-Peter Redlich
Richard D. Gitlin
NEC Labs America, Inc.
Possible Approaches for DNA

Reactive Approach


Proactive Approach


Acquire all the necessary information after the link
change has occurred (Probably after the L2 trigger).
o The whole DNA process is in the time-critical
path.
Acquire (some of ) the necessary information
before the link change and use it for the DNA
process after the link change.
o Complementary to the reactive approach.
Embedding L3 info into L2 Approach

Acquire (all or most of) the necessary information
from the L2 messages or L2 Trigger
03/02/2004
Proactive Approach for DNA
Detecting
establishment
of a new link
Checking
the subnet
of the new link
Checking
the validity
of the current IP
configuration
Acquiring
Information
for the new IP
configuration
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How to Get Information about the Neighbors

Memorized information about the old links
(locally stored and managed by the MN)


Limited by the roaming history of the MN.
Information provisioning by the network

Possible tool: Candidate Access Router Discovery
(CARD) Protocol
o Submitted to the IESG for an experimental RFC
recently.
o The CARD protocol provides means to request
and deliver the information between the MN and
the current AR.
o Need more work for DNA
•
03/02/2004
Ex. Defining the information types and their formats,
Proactive Approach for DNA
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