Thomas
Kunz
Systems
and Computer Engineering
Typical Scenario
nA. Domain Discovery
Ø1- PoA
§Recognizes
the existence of an AP, and access domain.
§Verifies
whether access domain requires authentication (basic vs. private domain).
§Broadcasts
message to all ad-hoc nodes.
Ø2- Ad-hoc Node
§Receives the
gateway announcement. Registers the PoA as a possible gateway with expiry time
and metric.
nB. QoS Negotiation
Ø3- Ad-hoc Node
§Selects best
PoA to use as a gateway for its extranet traffic, could be biased towards most
recent PoA, or to rely more
on the cost / hop count.
§If
application decides to use IntServ, and full E2E reservation, it can send the
E2E to the selected PoA. In this case
reserving resources all the way to the other end is the responsibility of the
MANET ad-hoc node.
§Otherwise,
it needs to submit the packets to the network. Packets will reach the PoA.
Ø4- PoA
§If PoA
“knows” what to do with packet, forward the packets, else
§broadcast
(or send to a specific node) a solicit aRSVP request.
Ø5- AN
§Conducts
aRSVP negotiation with AP on behalf of the network for the new DSCP.
§Acknowledges
PoA with the newly established connection with AP.
Ø6- PoA
§Receives
acknowledgement from AN, and starts packet marking, and forwarding to AP.