routing in mobile ad-hoc networks

Nov 13, 20031

Routing in Mobile Ad-Hoc Networks

Ernst W Grundke

Faculty of Computer ScienceDalhousie University

Halifax NS

Nov 13, 20032

The Ant Colony

Nur Zincir-HeywoodErnst Grundke

Allan JostOwen Yue

Donald MorrisonNick PilonWei Guo

Nov 13, 20033

5-Layer Model

Application

Network

Link

Physical

Transport

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In a mobile ad-hoc network, ... •… there is no wired infrastructure•… communication is short-range wireless•… node power is scarce •…

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• Network topology is dynamic

Ad-hoc network

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• Network topology is dynamic

Ad-hoc network

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• Network topology is dynamic

Ad-hoc network

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In a mobile ad-hoc network, ... •… there is no wired infrastructure•… communication is short-range wireless•… node power is scarce •… topology is dynamic:

nodes move, nodes join & leave the network

•...hosts = routers

How to do routing?

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RIP

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Mobile Agent Routing (“Ants”)

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Ants

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Ants

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Ants

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• Ant history lists collect and disseminate routing data.

Ants

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• How many ants?

– What about “kidnapped” ants?

• Ant lifetimes?

• Ant history length?

• Should mobility affect ant birth rates?

• How best to incorporate ants in protocol stacks?

• Constraint: No global data.

Ants: Lots of Open Questions

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Continuum Modelling

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• Nodes randomly distributed• Routing data arrives randomly

Continuum Modelling

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• Surprise! CM can predict:– scaling behaviour– breakdown due to routing traffic– effects of mobility on routing tables– transient effects

• CM produces dimensionless parameters that characterize the network.

Continuum Modelling

Nov 13, 200319

The Ant Colony

Nur Zincir-HeywoodErnst Grundke

Allan JostOwen Yue

Donald MorrisonNick PilonWei Guo

Nov 13, 200320

?Comments?

Questions?

Ernst.Grundke@dal.caNur.Zincir@dal.ca