Informatischen Kolloquium Hamburg
Termine unter: http://www.informatik.uni-hamburg.de/Info/Kolloquium/
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* Modelling Incentives and Protocols for Collaboration in Mobile Ad Hoc Networks *
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Prof. Anthony E. Krzesinski
Department of Computer Science
University of Stellenbosch, South Africa
Montag, 22. Juni 2009
um 17 Uhr c.t.
Vogt-Kölln-Straße 30
Konrad-Zuse-Hörsaal
Gebäude B
Ad hoc networks are self-configuring networks of mobile nodes,
connected by wireless links. If a destination node is beyond the
transmission range of an origin node, then the nodes must cooperate to
provide a multi-hop route. Any node can act as a sender, receiver
or transit node. It is in a node's interest to be a sender or receiver,
but it is less clear what the value is of forwarding traffic on behalf
of other nodes. The nodes should therefore be given incentives to
act as transit nodes, because otherwise the network would fail to
function. A way to do so is by introducing for each node a credit
balance, where nodes use credits to pay for the costs of sending their
own traffic, and earn credits by forwarding traffic from other nodes.
The incentive scheme requires that the information needed to compute
the credit balance at each node must be locally available at the node.
We present a model of a signalling protocol that obtains
and distributes the prices that the nodes charge for processing
flows so that the credit balances can be locally computed at each
node. Simulation experiments show that the protocol can efficiently
gather and distribute the control information such that effective
flow allocation takes place for reasonable values of the signalling
rate and signal processing delays.
Kontakt: Prof. Dr. Bernd Page
page@informatik.uni-hamburg.de, Tel. 42883-2426
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