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ARC Special Research Centre for Ultra-BroadbandInformation Networks

Cubin : Applied Research

Graeme Pendock

27/1/04

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Outline

Rationale - why make stuff Obstacles - why we tend not to make stuff Proposal idea of something to make

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Rationale or why make stuff ? its an Engineering Department .. its a real (not abstract) world

we are surrounded by stuff that we use, control, interactwith

balance theory vs. applied helps make research relevant

awareness from even understanding how stuff is made,works

practical limits, implementation difficulties, tradeoffs increase employability

broader range of useful skills e.g. real software/OS programming, linux, networking,device driver, VHDL, FPGA/CPLD, DSP etc

creates questions fun, satisfaction in making something

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Obstacles why we shy away? no previous experience

if all youve done is write Hello World programs then startwith applied software (e.g. IO/device driver/networkprogramming) rather than hardware

fear of unknown, intimidated by learning curve never as bad as anticipated

fear of failure cultural. so what ? it will work next time..

money optics ($$$), rf ($$), computers ($), software ()

lack of infrastructure/support (external) IT/computer, technical, purchasing reduced publication output

Australia : publication volume is dominant metric (notuniversal)

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Proposal (1)

flavour of the month : wireless sensor networks pin head size wireless sensors scattered from

airplanes, float down rivers, go around your arteries,and report all back to big brotherblah..blah..yeah

reality check : need electronic integration what turned me on last week : Berkley Motes + TinyOS

standard off-shelf electronics : atmel 8-bit processor +wireless module

cc/coin size power 2xAA batteries for year simple sensing : temp, pressure, motion etc custom, simple open-source OS (self-forming network) research group (team of 9, 16 publications)

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Proposal (2) what drives wireless sensors is power, size and cost; but this

limits functionality and range envision Australian applications (farming, forestry,

environmental, mining) where require greater range (~km)desirable and cost and power less critical (eg. solar powered)

relaxed power and size allow more powerful uCs and functionality

eg. 32-bit embedded processors linux

existing applications, networking, devices aid development. use lab PCs reuse port later to target uC platform

prototype hardware wireless module to PC (parallel port / i2c bus on memory ?) later to existing embedded module

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Proposal (3)

low-hardware, low-capital, min-tech support vertical project requires range of people with different

skills, expertise work required

interface of wireless module to PC/uC device driver media access network stack routing, networking

applications interested ? volunteers ?

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ARC Special Research Centre for Ultra-BroadbandInformation Networks

An IP Network Test-bedTao Peng

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Why an IP network test-bed?

Real-time performance It is important to publish source code as well asresearch papers

Experiment is a good way to reduce the gap

between theory and practice. It is better to study attack defense schemes in

test-bed than waiting for an attack to appear inthe Internet.

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Our Proposal

Worm Traffic Modeling

Evaluation of Combined Defense Models.

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Worm Traffic Modeling

: Infected computer

: vulnerable computer

collecting the trafficcollecting the traffic

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Evaluation of Combined Defense Models

Attack source

Filtering at the target

Selective Pushback

Filtering atthe source

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Something more

An IP network test-bed can also benefit thefollowing research issues: Quality of Service (QoS) TCP flow control IP V.6

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WLAN multi-user diversity

Core Network

m c

q(t)

Access Point

(Router)

S 1

S 2

S k

60%80%95%

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Testbed

Access point monitors channel Reception quality? Explicit signalling from mobiles? Told bit rate of previous transmission?

Chooses as next user the one which would getthe highest rate

Fairness constraints Several existing algorithms

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Requirements

WLAN cards which give: Signal strength from last transfer Rate of last transfer (May be enough) Minimal internal buffering

Signalling scheme for receivers & BS? Time to learn about drivers...

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Benefits

Study interaction with higher layers CLAMP flow control

Gather statistics of actual channel use: Simultaneous users? Rates achieved Time-scale of variation of rates

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Hurdles / disincentives

Finding suitable cards Time investment What recognition?

Not publishable research Wont attract grant funding

Would real users use the setup? Benefit only if many users on the network Need drivers on individual (MS) notebooks?

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