bubble sensing

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Bubble Sensing: Binding a Sensing Task to the Physical World using mobile phonesANIKET.P.JOSHI 35027

AGENDA Introduction Bubble Sensing Architecture Problems and Security Concerns Advantages Related Work Conclusion References

IntroductionHere we present the bubble-sensing system that support the persistent sensing of a particular location, as required by user requests. Conceptually, a user with a phone that has opted into the bubble-sensing system visits a location of interest, presses a button on his phone to affix the sensing request to the location, and then walks away. The sensing request persists at the location until the timeout set by the initiator is reached.

Bubble SensingSensing tasks are created and maintained in the bubble-sensing system through the interaction of a number of virtual roles.

Virtual rolesBubble creator Bubble anchor Bubble carrier Sensing node

Bubble sensing

Bubble Creation PhaseBubble Server

Bubble Anchor Bubble Creator Mobile Sensor Mobile Sensor

Bubble Maintenance PhaseDue to uncontrolled mobility of the creator ,the creator may leave the bubble location while task is still active. So to anchor the bubble to the location of intrest we use bubble anchors. Two variants for bubble anchor selection: 1. Location based 2. Mobility based

Challenges to maintenancey As we do not require sensing nodes to have

knowledge of their absolute location, recipients of the task broadcast that are outside of the bubble area defined in the broadcast may still collect and upload data to the bubble server. This potentially makes the effective bubble size larger than the specified bubble size.y The bubble drift.

Bubble Restoration Phase

Bubble Server Bubble carrier

Bubble AnchorMobile Sensor Mobile Sensor

ArchitectureProgramming languages Communication Sensor Classifier System integration

Problems1. Hold the bubble in the area of interest.2. Recover from lost bubble. 3. Exploit heterogeneous devices.

Privacy and security concerns1 . The sharing of device resources with unknown third parties. 2. Individuals privacy concerning their daily activities is at risk from other users if bubble sensing system is misused.



Related workAs the mobile phone is ubiquitous, and the discussion of a mobile phones used as a sensing device has some history no largescale mobile cell phone sensor networks have yet been deployed in practice. I n the last few years, the smart phone market has grown rapidly (e.g., Nokia N95, Apple iPhone), cultivating ground for research 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 o mobile sensor nodes collaborate and S share sensing and communication resources with each other in a cooperative sensing environment. o we presented an approach to support S persistent location-specific task in a wireless sensor network composed of mobile phones.

ReferencesA .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. on Wireless 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 Wireless Sensor 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 Pervasive Computing 6 (2) (2007) S .B. Eisenman, A.T. Campbell, SkiScape sensing, in: Proc. of ACM 4th Int l Conf. Embedded Networked Sensor Systems, SENSYS 04, 2006.

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