Transcript
Bubble Sensing: Binding aSensing Task
to the Physical World usingmobile phones
D.SRINATHREDDY 08301A0596
AGENDA• Introduction• Bubble Sensing• Architecture• Problems and Security Concerns• Advantages• Related Work• Conclusion• References
IntroductionHere we present the bubble-sensing system thatsupport the persistent sensing of a particular location,as required by user requests.
Conceptually, a user with a phone that hasopted into the bubble-sensing system visits a locationof interest, presses a button on his phone to affix thesensing request to the location, and then walks away.The sensing request persists at the location until thetimeout set by the initiator is reached.
Bubble Sensing
Sensing tasks are created and maintained in thebubble-sensing system through the interaction of anumber of virtual roles.
Virtual roles-
Bubble creatorBubble anchorBubble carrierSensing node
Bubble sensing
Bubble Creation Phase
Bubble Server
Bubble AnchorBubble Creator
Mobile Sensor Mobile Sensor
Bubble Maintenance Phase
Due to uncontrolled mobility of the creator ,the
creator may leave the bubble location while task isstill active.
So to anchor the bubble to the location of intrest weuse bubble anchors.
Two variants for bubble anchor selection:
1. Location based
2. Mobility based
Challenges to maintenance
y As we do not require sensing nodes to haveknowledge of their absolute location, recipients ofthe task broadcast that are outside of the bubblearea defined in the broadcast may still collect andupload data to the bubble server. This potentiallymakes the effective bubble size larger than thespecified bubble size.
y The bubble drift.
Bubble Restoration Phase
Bubble Server
Bubble carrierBubble Anchor
Mobile Sensor
Mobile Sensor
ArchitectureProgramming languagesCommunicationSensorClassifierSystem integration
Problems
1. Hold the bubble in the area of interest.
2. Recover from lost bubble.
3. Exploit heterogeneous devices.
Privacy and security concerns
‡1. The sharing of device resources with unknown third parties.
2. Individual’s privacy concerning� their daily activities is at risk from other users if bubble sensing system is misused.
ADVANTAGES
u1
Related work‡ As the mobile phone is ubiquitous, and thediscussion of a mobile phones used as asensing device has some history no large-scale mobile cell phone sensor networkshave yet been deployed in practice.
‡In the last few years, the smart phonemarket has grown rapidly (e.g., Nokia N95,
Apple iPhone), cultivating ground forresearch on mobile sensor networking.
SOAP BUBBLE SENSING
• An electronic soap bubble sensing and responsive device which is activated upon making contact between a soap bubble and an electronic sensor
• 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 the number of data samples collected and the time coverage of those samples.
Conclusion‡So mobile sensor nodes collaborate andshare sensing and communication resourceswith each other in a cooperative sensingenvironment.‡So we presented an approach to supportpersistent location-specific task in a wirelesssensor network composed of mobile phones.
References‡A.T. Campbell, S.B. Eisenman, N.D. Lane, E. Miluzzo, R.A. Peterson,People-centric urban sensing, in: Proc. of 2nd ACM/IEEE Int l Conf. onWireless Internet, WICON 06, ACM Int l Conf. Proc. Series, vol. 220, No. 18,Boston, Aug 2 5, 2006, (Invited Paper).
‡J. Burke, D. Estrin, M. Hansen, A. Parker, N. Ramanathan, S. Reddy, M.B.Srivastava, Participatory sensing, in: Proc. of 1st Workshop on WirelessSensor Web, WSW 06, Boulder, October 31, 2006.
‡T. Abdelzaher, Y. Anokwa, P. Boda, J. Burke, D. Estrin, L. Guibas, A. Kansal,S. Madden and J. Reich, Mobiscopes for human spaces, IEEE PervasiveComputing 6 (2) (2007)
‡S.B. Eisenman, A.T. Campbell, SkiScape sensing, in: Proc. of ACM 4th Int lConf. Embedded Networked Sensor Systems, SENSYS 04, 2006.
Thank you
top related