bubble sensing 17

8/3/2019 Bubble Sensing 17

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WELCOME


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BYMANU RAJ KM (08420017)

UNDER THE GUIDANCE OFSHEENA N(HOD CSE)

BUBBLESEN

SING


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COTENTS33

INTRODUCTION

BUBBLE SENSING

KEYWORDS

BUBBLE CREATION

BUBBLE MAINTENANCE

BUBBLE RESTORATION

IMPLEMENTATION

TESTBED EVALUATION

FUTURE USES


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ON

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Binding sensing tasks to the physical world

It is based on adhoc and delay tolerent

Mobile phones&PDAs are used

N80,N95,i-phone etc


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BUBBLE SENSING55

A number of virtual roles ,create andmaintain the Bubble Sensing TASK.

A task is a tuple ACTION

CONTEXT


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KEYWORDS66

Bubble creator

Bubble anchor

Bubble carrier

Sensing node

Bubble server


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BUBBLE SENSING

ARCHITECTURE77


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BUBBLE CREATION88

Bubble creator:

device whose user initiates the sensing

request that leads to the creation of the sensing

bubble

Mobile phone

Any device that registers a task with the bubble

server


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BUBBLE

MAINTENANCE99 Reason for maintaining the bubble is:

Uncontrolled mobility of the creator

Bubble anchor

All sensing nodes that are able to hear the

broadcast messages are called potential

anchors.


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1010

Two variants for bubble anchor selection are:

Location based:

In this location based maintenance , the bubbles

are maintained based on the location of the bubble

created

Mobility based:

In this mobility based maintenance , the bubbles are

maintained based on the radio range of the mobile


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1111

Increased Bubble Sizes

Bubble Drift

Anchor moves

can be reduced timeout to the probabilisticlimit the bubble drift is limited to desired level

Mobility based maintenance

CHALLENGES TO BUBBLE

MAINTENANCE


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BUBBLE RESTORATION1212

Due to node mobility, it may happen that no

nodes are available to anchor the bubble to

desired location and bubble may temporarily

disappear.

We can overcome this scenario by using bubble

restoration through the actions of the bubblecarrier nodes.

Mobile phones filling this role require localization


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IMPLEMENTATION1313

Symbian based high end phones are used(N

95,N80)

Symbian OS S60 v3.

GPS,accelerometer,wi-fi Etc Enabled Phones Or

PDAs Used


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THE BUBBLE-SENSING ARCHITECTURE

IMPLEMENTED ON EACH MOBILE DEVICE1414


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PROGRAMMINGLANGUAGE1515

We use PyS60

It has access to the phones functionssuch ascamera,accelerometer,microphone,gpsetc.

Developer can add access to the nativesymbian apis using the c/c++ extensionmodule


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COMMUNICATION1616

Equipped with GPRS/EDGE, 3G, Bluetooth and

Wi-Fi interfaces

For data uplink, they can leverage GPRS, SMS,

and MMS

Wi-Fi/Bluetooth access points can used for local

peer-to-peer communication


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SENSORS1717

We use lower resolution pictures

record sound in 2 sec sound clips in .auformat,about 28 kB

N95 comes with an on-board GPS and a built-in3D accelerometer

N80 has an extended BLUCEL accelerometer


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3D ACCELEROMETER VIA BLUETOOTH1818


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SENSOR MANAGER

1919Coordinates the interleaved

sampling of the various sensors

Configures the sensors to sampleaccording to the parameters passedto it by the task manager.


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CLASSIFIER2020

A preprocessor and an activity classifier

Preprocessor normalizes the raw accelerometer

data from sensor manager

Activity classifier classifies various conditions

Virtual role manager maintain the stationary

property of the sensing bubble.


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LOCALIZATION2121

GSM fingerprint

Bluetooth indoor localization

Wi-Fi localization systems such

Skyhook & Navizon.


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TESTBED EVALUATION2222

The aim of this evaluation is to validate the

performance of a mobile cell phone network and

how it can benefit from the use of bubble

sensing mechanisms, mainly in terms of thenumber of data samples collected and the time

coverage of those samples

Experiment Setup During the experiment, we play music in

the bubble and the

task is sim l ca turin sound cli s in this


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FUTURE USE2323

Sensing bubbles can be used for people tomore easily self-organize

A bubble could be established near afactory to monitor pollution

Recreational communities of joggers,cyclists can form groups within whichthey share information about routes,conditions and performance.


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CONCLUSIONS2424

To support persistent location-specific task in a

wireless sensor network composed of mobile

phones.

Mobile sensor nodes collaborate and share

sensing and communication resources with each

other in a cooperative sensing environment.

Virtual roles nodes can assume in support of

bubble-sensing, including the required local and


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REFERENCES2525

http://www.apple.com/ipod/nike/

http://spectrum.ieee.org /bubble sensing

www.future.wikia.com

http://library.thinkquest.org/03oct/00760


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THANK YOU2727

bubble sensing 17

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